Load balancing method of X-ray tube and load-balanced X-ray system

Abstract

The invention provides a load balancing method of an X-ray tube and a load-balanced X-ray system.The load balancing method of the X-ray tube comprises the steps that cathode high voltage and anode high voltage which are related in polarity are provided for the X-ray tube, and a winding of a first transformer and a winding of a second transformer of a high-voltage generator are adjusted based on a target voltage difference value to be output; therefore, the difference value between the leakage inductance of the first transformer and the leakage inductance of the second transformer is changed to reach a target leakage inductance difference value, and the adjusted leakage inductance of the first transformer and the adjusted leakage inductance of the second transformer carry out corresponding voltage division on an anode high-voltage output loop and a cathode high-voltage output loop respectively. Therefore, the voltage difference value of the target anode high voltage and the target cathode high voltage of the adjusted X-ray tube reaches the target voltage difference value, the purpose of balancing the output voltage is achieved, an additional inverter circuit structure does not need to be added, the structures of the high voltage generator and the X-ray system are simplified, the design cost is reduced, and the method is suitable for large-scale popularization and application. And the system reliability is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of X-ray tubes, and in particular relates to a load balancing method for an X-ray tube and a load balanced X-ray system. Background Art

[0002] Currently, X-ray computed tomography (CT) has made great progress both in basic technology and clinical application, and has become one of the widely used diagnostic methods in the field of medical imaging.

[0003] In the CT system, X-rays are mainly generated by high-voltage generators and X-ray tubes. The high-voltage generator outputs high voltage (kV) and filament current, which are loaded into the X-ray tube to generate X-rays. According to the different structures of X-ray tubes, they can be divided into unipolar X-ray tubes and bipolar X-ray tubes, and the corresponding high-voltage generators are unipolar high-voltage generators and bipolar high-voltage generators. Figure 1 The kV output by the bipolar high voltage generator includes both positive high voltage (kV1) and negative high voltage (kV2) to the ground.

[0004] In the actual application of CT, the current inside the X-ray tube is the current generated by the movement of free electrons emitted by the filament at the cathode end of the X-ray tube. In the process of free electrons reaching the other end (anode) of the tube inside the tube, some electrons will be emitted to the tube wall due to scattering. For bipolar X-ray tubes, the tube wall of the X-ray tube is grounded, and some of the free electrons emitted by the cathode reach the anode end to form an anode loop current, while the scattered electrons form a loop current through the grounded tube wall. Therefore, from the perspective of circuit principle, the cathode current and anode current of the bipolar X-ray tube are not equal due to the presence of scattered electrons. For the bipolar high-voltage generator, it works under the condition of unbalanced loads of the cathode and anode. The cathode high voltage of the high-voltage output will be less than the anode high voltage, resulting in an imbalance between the cathode high voltage and the anode high voltage.

[0005] In order to meet the balance of cathode kV and anode kV, the prior art designs a set of inverter power supply for the cathode circuit and the anode circuit respectively, and the two circuits independently control the cathode and anode kV, thereby solving the output kV imbalance problem caused by load imbalance. However, the two independent inverter circuits not only increase the cost of the high-voltage generator, but also increase the volume and weight of the high-voltage generator. For equipment working on a high-speed rotating CT frame, the whole machine operation increases the load and reduces the system reliability. Summary of the invention

[0006] The object of the present invention is to provide a load balancing method for an X-ray tube, aiming to solve the problems of high cost, complex structure and low reliability existing in the traditional load balancing method.

[0007] A first aspect of an embodiment of the present invention provides a load balancing method for an X-ray tube, the load balancing method comprising:

[0008] A high voltage generator is configured to connect the cathode and anode of the X-ray tube, and provide cathode high voltage to the cathode of the X-ray tube and provide anode high voltage to the anode of the X-ray tube, wherein the voltage polarities of the cathode high voltage and the anode high voltage are opposite, and the high voltage generator includes a first transformer and a second transformer, wherein the first transformer is arranged in the output circuit of the anode high voltage, and the second transformer is arranged in the output circuit of the cathode high voltage;

[0009] adjusting the winding of the first transformer and / or the winding of the second transformer based on the target voltage difference to be output, so as to adjust and output a target leakage inductance difference corresponding to the target voltage difference and the target voltage difference, wherein the target leakage inductance difference is not zero;

[0010] The target voltage difference is the voltage difference between the absolute value voltage of the target anode high voltage of the anode and the absolute value voltage of the target cathode high voltage of the cathode, and the target leakage inductance difference is the leakage inductance difference between the target leakage inductance of the first transformer and the target leakage inductance of the second transformer.

[0011] Optionally, the step of adjusting the winding of the first transformer and / or the winding of the second transformer based on the target voltage difference to be output so as to adjust the target leakage inductance difference corresponding to the target voltage difference and the target voltage difference to be output specifically includes:

[0012] Determine a theoretical leakage inductance difference between the first transformer and the second transformer based on a target voltage difference to be output, wherein the theoretical leakage inductance difference is a leakage inductance difference between a theoretical leakage inductance of the first transformer and a theoretical leakage inductance of the second transformer;

[0013] Determining adjustment parameters of the windings of the first transformer and / or adjustment parameters of the second transformer based on the theoretical leakage inductance difference;

[0014] The winding of the first transformer is adjusted based on the adjustment parameters of the first transformer, and / or the winding of the second transformer is adjusted based on the adjustment parameters of the second transformer to adjust the target leakage inductance difference and the target voltage difference to output corresponding to the target voltage difference.

[0015] Optionally, the adjustment parameter of the first transformer includes at least one parameter of a first overlap value of the primary and secondary windings of the first transformer along the direction of the wound magnetic column, a coil thickness of the primary winding of the first transformer, and a coil thickness of the secondary winding;

[0016] The adjustment parameters of the second transformer include at least one parameter of a second overlap value of the primary and secondary windings of the second transformer along the direction of the wound magnetic column, a coil thickness of the primary winding of the second transformer, and a coil thickness of the secondary winding;

[0017] Among them, the overlap value is the overlap between the size of the secondary winding along the magnetic column direction and the size of the corresponding primary winding along the magnetic column direction, and the coil thickness is the size of the radial direction of the entire winding along the magnetic column direction after winding.

[0018] Optionally, the high-voltage generator comprises a magnetic core, a first primary winding, a first secondary winding and a second secondary winding, the magnetic core, the first primary winding and the first secondary winding constitute the first transformer, and the magnetic core, the first primary winding and the second secondary winding constitute the second transformer;

[0019] The first primary winding is wound on the magnetic column of the magnetic core, and the first secondary winding and the second secondary winding are wound on the first primary winding side by side and spaced apart along the direction of the magnetic column, or the first primary winding is wound on the magnetic column of the magnetic core, the second secondary winding is wound on the first primary winding, and the first secondary winding is wound on the second secondary winding;

[0020] The adjustment parameters of the first transformer include a first overlap value of the first secondary winding and the first primary winding along the magnetic column direction, and / or include a coil thickness of the first secondary winding;

[0021] The adjustment parameters of the second transformer include a second overlap value of the second secondary winding and the first primary winding along the magnetic column direction, and / or include a coil thickness of the second secondary winding.

[0022] Optionally, the high-voltage generator comprises a magnetic core, a first primary winding, a second primary winding, a first secondary winding and a second secondary winding, the magnetic core, the first primary winding and the first secondary winding constitute the first transformer, and the magnetic core, the second primary winding and the second secondary winding constitute the second transformer;

[0023] The first primary winding is wound on the first magnetic column of the magnetic core, the first secondary winding is wound on the first primary winding, the second primary winding is wound on the second magnetic column of the magnetic core, the second secondary winding is wound on the second primary winding, and the first magnetic column and the second magnetic column are arranged opposite to each other;

[0024] The adjustment parameters of the first transformer include a first overlap value of the first secondary winding and the first primary winding along the magnetic column direction, and / or include a coil thickness of the first secondary winding;

[0025] The adjustment parameters of the second transformer include a second overlap value of the second secondary winding and the second primary winding along the magnetic column direction, and / or include a coil thickness of the second secondary winding.

[0026] Optionally, the step of adjusting the winding of the first transformer based on the adjustment parameter of the first transformer, and / or adjusting the winding of the second transformer based on the adjustment parameter of the second transformer, so as to adjust and output a target leakage inductance difference corresponding to the target voltage difference and the target voltage difference specifically includes:

[0027] adjusting the first coincidence value based on an adjustment parameter of the first transformer, and / or adjusting the second coincidence value based on an adjustment parameter of the second transformer, so that a coincidence difference between the first coincidence value and the second coincidence value corresponds to the target leakage inductance difference, wherein the coincidence difference is not zero;

[0028] And / or, adjusting the coil thickness of the first secondary winding based on the adjustment parameters of the first transformer and / or adjusting the coil thickness of the second secondary winding based on the adjustment parameters of the second transformer, so that the thickness difference between the coil thickness of the first secondary winding and the coil thickness of the second secondary winding corresponds to the target leakage inductance difference, so as to adjust the output to correspond to the target leakage inductance difference and the target voltage difference, wherein the thickness difference is not zero.

[0029] A second aspect of an embodiment of the present invention provides a load-balanced X-ray system, comprising:

[0030] An X-ray tube, the X-ray tube comprising a cathode and an anode;

[0031] A high voltage generator, the high voltage generator is used to connect the cathode and anode of the X-ray tube, and provide cathode high voltage to the cathode of the X-ray tube and provide anode high voltage to the anode of the X-ray tube, the voltage polarities of the cathode high voltage and the anode high voltage are opposite, the high voltage generator comprises a first transformer and a second transformer, the first transformer is arranged in the output circuit of the anode high voltage, and the second transformer is arranged in the output circuit of the cathode high voltage;

[0032] The leakage inductance difference between the leakage inductance of the first transformer and the leakage inductance of the second transformer is a target leakage inductance difference corresponding to the target voltage difference, and the target voltage difference is the voltage difference between the absolute value voltage of the target anode high voltage of the anode and the absolute value voltage of the target cathode high voltage of the cathode, and the target leakage inductance difference is not zero.

[0033] Optionally, the load-balanced X-ray system further includes:

[0034] A regulating device is connected to the high voltage generator, and the regulating device is used to implement the steps of the load balancing method as described above.

[0035] Optionally, the high-voltage generator comprises a magnetic core, a first primary winding, a first secondary winding and a second secondary winding, the magnetic core, the first primary winding and the first secondary winding constitute the first transformer, and the magnetic core, the first primary winding and the second secondary winding constitute the second transformer;

[0036] The first primary winding is wound on the magnetic column of the magnetic core, and the first secondary winding and the second secondary winding are wound on the first primary winding side by side and spaced apart along the direction of the magnetic column;

[0037] Alternatively, the first primary winding is wound on the magnetic column of the magnetic core, the second secondary winding is wound on the first primary winding, and the first secondary winding is wound on the second secondary winding;

[0038] The difference between the first coincidence value and the second coincidence value is a target coincidence difference corresponding to the target leakage inductance difference, and / or the difference between the thickness of the coil of the first secondary winding and the thickness of the coil of the second secondary winding is a target thickness difference corresponding to the target leakage inductance difference, and the target coincidence difference and / or the target thickness difference are not zero;

[0039] The first overlap value is an overlap value of the first secondary winding and the first primary winding along the magnetic column direction, and the second overlap value is an overlap value of the second secondary winding and the first primary winding along the magnetic column direction.

[0040] Optionally, the high-voltage generator comprises a magnetic core, a first primary winding, a second primary winding, a first secondary winding and a second secondary winding, the magnetic core, the first primary winding and the first secondary winding constitute the first transformer, and the magnetic core, the second primary winding and the second secondary winding constitute the second transformer;

[0041] The first primary winding is wound on the first magnetic column of the magnetic core, the first secondary winding is wound on the first primary winding, the second primary winding is wound on the second magnetic column of the magnetic core, the second secondary winding is wound on the second primary winding, and the first magnetic column and the second magnetic column are arranged opposite to each other;

[0042] The difference between the first coincidence value and the second coincidence value is a target coincidence difference corresponding to the target leakage inductance difference, and / or the difference between the thickness of the coil of the first secondary winding and the thickness of the coil of the second secondary winding is a target thickness difference corresponding to the target leakage inductance difference, and the target coincidence difference and / or the target thickness difference are not zero;

[0043] The first overlap value is an overlap value of the first secondary winding and the first primary winding along the magnetic column direction, and the second overlap value is an overlap value of the second secondary winding and the second primary winding along the magnetic column direction.

[0044] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: in the above-mentioned load balancing method for an X-ray tube, a high voltage generator is connected to the cathode and anode of the X-ray tube, and at the same time, a cathode high voltage and an anode high voltage with polarity related are provided to the X-ray tube, and the windings of the first transformer and the second transformer of the high voltage generator are adjusted based on the target voltage difference to be output, so as to change the difference between the leakage inductance of the first transformer and the leakage inductance of the second transformer to reach the target leakage inductance difference, and the leakage inductance of the adjusted first transformer and the second transformer respectively divides the output circuit of the anode high voltage and the output circuit of the cathode high voltage accordingly, so that the voltage difference between the target anode high voltage and the target cathode high voltage of the adjusted X-ray tube reaches the target voltage difference, and when it is necessary to achieve the purpose of balanced output voltage, the target voltage difference can be set to zero or close to zero, and the windings of the first transformer and the second transformer are adjusted to achieve the output voltage difference reaching the target voltage difference, so as to achieve the purpose of balanced output voltage, and the method does not need to add an additional inverter circuit structure, simplifies the structure of the high voltage generator and the X-ray system, reduces the design cost, and increases the system reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0046] Figure 1 A circuit diagram of a load-balanced X-ray system provided by an embodiment of the present invention;

[0047] Figure 2 A schematic diagram of a load balancing method according to an embodiment of the present invention;

[0048] Figure 3 A schematic diagram of the flow of step S20 in the load balancing method provided in an embodiment of the present invention;

[0049] Figure 4 A schematic diagram of a first structure of a first transformer and a second transformer provided in an embodiment of the present invention;

[0050] Figure 5 A second structural schematic diagram of a first transformer and a second transformer provided in an embodiment of the present invention;

[0051] Figure 6 A third structural schematic diagram of the first transformer and the second transformer provided in an embodiment of the present invention;

[0052] Figure 7 A fourth structural schematic diagram of the first transformer and the second transformer provided in an embodiment of the present invention;

[0053] Figure 8 A fifth structural schematic diagram of the first transformer and the second transformer provided in an embodiment of the present invention;

[0054] Fig. 9 A sixth structural schematic diagram of a first transformer and a second transformer provided in an embodiment of the present invention;

[0055] Fig.10 A seventh structural schematic diagram of a first transformer and a second transformer provided in an embodiment of the present invention;

[0056] Fig.11 An eighth structural schematic diagram of a first transformer and a second transformer provided in an embodiment of the present invention;

[0057] Fig.12 A ninth structural schematic diagram of the first transformer and the second transformer provided in an embodiment of the present invention.

[0058] Among them, the reference numerals in the figures are:

[0059] 100, high voltage generator; 110, inverter circuit; 120, resonant circuit; 130, first voltage doubling rectifier circuit; 140, second voltage doubling rectifier circuit; 10, X-ray tube; 11, anode; 12, cathode; 141, magnetic core; 1411, first magnetic column; 1412, second magnetic column; 142, first primary winding; 143, first secondary winding; 144, second secondary winding; 145, second primary winding;

[0060] Q1, switch on the first bridge arm; Q2, switch on the second bridge arm; Q3, switch on the first bridge arm; Q4, switch on the second bridge arm; T1, first transformer; T2, second transformer; L1, leakage inductance of the first transformer; L2, leakage inductance of the second transformer; N1, first coincidence value; N2, second coincidence value; X1, first direction; X2, second direction. DETAILED DESCRIPTION

[0061] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0062] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0063] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0064] A first aspect of an embodiment of the present invention provides a load balancing method for an X-ray tube 10. A first aspect of an embodiment of the present invention provides a load balancing method for an X-ray tube 10. The load balancing method includes:

[0065] S10, configuring a high voltage generator 100 to connect the cathode 12 and the anode 11 of the X-ray tube 10, and providing a cathode high voltage KV2 to the cathode 12 of the X-ray tube 10 and providing an anode high voltage KV1 to the anode 11 of the X-ray tube 10, wherein the voltage polarities of the cathode high voltage KV2 and the anode high voltage KV1 are opposite, and the high voltage generator 100 includes a first transformer T1 and a second transformer T2, the first transformer T1 is arranged in the output circuit of the anode high voltage KV1, and the second transformer T2 is arranged in the output circuit of the cathode high voltage KV2;

[0066] S20, adjusting the winding of the first transformer T1 and / or the winding of the second transformer T2 based on the target voltage difference to be output, so as to adjust the target leakage inductance difference and the target voltage difference corresponding to the target voltage difference, wherein the target leakage inductance difference is not zero;

[0067] The target voltage difference is the voltage difference between the absolute value voltage of the target anode high voltage of the anode 11 and the absolute value voltage of the target cathode high voltage of the cathode 12 , and the target leakage inductance difference is the leakage inductance difference between the target leakage inductance of the first transformer T1 and the target leakage inductance of the second transformer T2 .

[0068] like Figure 1 As shown, the high voltage generator 100 includes an inverter circuit 110, a resonant circuit 120, a transformer circuit, a first voltage doubling rectifier circuit 130 and a second voltage doubling rectifier circuit 140. The transformer circuit includes a first transformer T1 and a second transformer T2. The output end of the inverter circuit 110 is connected to the input end of the resonant circuit 120. The output end of the resonant circuit 120 is respectively connected to the input ends of the first transformer T1 and the second transformer T2. The output end of the first transformer T1 is connected to the input end of the first voltage doubling rectifier circuit 130. The first voltage doubling rectifier circuit 130 outputs an anode high voltage KV1 and an anode 11 current to the anode 11 of the X-ray tube 10. The output end of the second transformer T2 is connected to the input end of the second voltage doubling rectifier circuit 140. The second voltage doubling rectifier circuit 140 outputs a cathode high voltage KV2 and a cathode 12 current to the cathode 12 of the X-ray tube 10.

[0069] The inverter circuit 110 is composed of a plurality of parallel inverter bridge arms, the inverter bridge arms including bridge arm switches connected in series, the midpoint of the bridge arm switches being the output end of the inverter circuit 110, wherein Figure 1 As shown, the inverter circuit 110 includes a first inverter bridge arm and a second inverter bridge arm connected in parallel, the first inverter bridge arm includes a first bridge arm upper switch Q1 and a first bridge arm lower switch Q3 connected in series, and the second inverter bridge arm includes a second bridge arm upper switch Q2 and a second bridge arm lower switch Q4 connected in series. The inverter circuit 110 inverts the input DC power supply and outputs AC power to the resonant circuit 120.

[0070] The resonant circuit 120 is composed of corresponding inductors and capacitors, such as an LCC resonant circuit, etc. The resonant circuit 120 performs resonant conversion on the input AC power supply to improve power conversion efficiency.

[0071] Since the first transformer T1 and the second transformer T2 realize the voltage boost of the AC power supply, the primary windings of the first transformer T1 and the second transformer T2 are connected to the resonant circuit 120, and the first transformer T1 and the second transformer T2 can share the same magnetic core or use independent magnetic cores respectively. Correspondingly, the first transformer T1 and the second transformer T2 can share the same primary winding or include different primary windings respectively, that is, a transformer with independent cathode and anode can be selected, and a transformer with integrated cathode and anode can also be set. The secondary winding of the first transformer T1 is connected to the first voltage doubling rectifier circuit 130, and the secondary winding of the second transformer T2 is connected to the second voltage doubling rectifier circuit 140. The first voltage doubling rectifier circuit 130 and the second voltage doubling rectifier circuit 140 are used to realize the rectification of the AC power supply and amplify the output according to a preset multiple. The voltage doubling rectifier circuit can adopt corresponding rectifier bridge, amplifier circuit and other structures.

[0072] Among them, the first transformer T1 and the first voltage doubling rectifier circuit 130 form the output circuit of the anode high voltage KV1, and the second transformer T2 and the second voltage doubling rectifier circuit 140 form the output circuit of the cathode high voltage KV2. The two share the same inverter circuit 110 and the resonant circuit 120. According to the working principle of the LCC resonant circuit, the magnitude of the cathode high voltage KV2 and the anode high voltage KV1 is determined by the gain M of their respective output circuits and the inverter input voltage Vin. Assuming that the gain of the output circuit of the cathode high voltage KV2 is M1, the gain of the output circuit of the anode high voltage KV1 is M2. Anode high voltage KV1 = M1*Vin, cathode high voltage KV2 = M2*Vin. Due to the shared inversion, the inverter input voltages of the cathode 12 and the anode 11 are completely equal, and the relative magnitudes of M1 and M2 are completely determined by the magnitude of the load. The lighter the load, the greater the gain M.

[0073] Due to the electron scattering of the bipolar X-ray tube 10, the current of the anode 11 is smaller than the current of the cathode 12, that is, when the high-voltage generator 100 is working, the load of the anode 11 is lighter than the load of the cathode 12. If the high-voltage generator 100 only controls the total kV to meet the set target, then due to the difference in load weight, the cathode high voltage KV2 is smaller than the anode high voltage KV1, resulting in an imbalance between the two levels of high voltage.

[0074] An important difficulty in designing a bipolar high-voltage generator 100 is the insulation design of the high-voltage part. The absolute values ​​of the cathode and anode voltages are equal, and for the highest total kV output, the insulation stress of the cathode and anode 11 is minimal. However, due to the above-mentioned problem of imbalance between the cathode and anode 11 of the X-ray tube 10 load, the output of the anode 11 needs to meet a higher insulation design, which increases the cost of the high-voltage generator 100 and also brings greater challenges to its reliable operation. In addition, large-capacity X-ray tubes 10 all use a rotating anode 11 structure, so the structure of the anode 11 part of the X-ray tube is more compact, and the insulation design challenge is greater. An anode 11 that is too high will also affect the safe operation of the X-ray tube 10.

[0075] The cathode high voltage KV2 and the anode high voltage KV1 have opposite polarities. For example, the voltage range of the cathode high voltage KV2 is -70 kV to -75 kV, and the voltage range of the anode high voltage KV1 is +70 kV to +75 kV.

[0076] In practical applications, transformers all have an obvious leakage inductance. The generated leakage inductance is connected in series in the output circuit and divides the input voltage. The impedance value of the leakage inductance is Z=jωL, where ω is the frequency of the inverter circuit, j is an imaginary unit, and L is the inductance value of the leakage inductance. The larger the inductance value of the leakage inductance, the larger the impedance value of the leakage inductance, and the larger the voltage division value. When the input voltage and current of the first transformer T1 and the second transformer T2 are equal, the transformer with a larger leakage inductance has a smaller voltage at its output end.

[0077] Therefore, in order to solve the problem of high voltage imbalance between the cathode 12 and the anode 11 and output the required target anode 11 voltage, target cathode 12 voltage and target voltage difference, in the load balancing method of the X-ray tube 10, by obtaining the target voltage difference to be output, wherein the target voltage difference to be output is the voltage difference between the absolute value voltage of the target anode 11 voltage and the absolute value voltage of the target cathode 12 voltage, the winding of the first transformer T1 and the winding of the second transformer T2 are adjusted based on the target voltage difference, thereby changing the leakage inductance L1 of the first transformer T1 and the leakage inductance L2 of the second transformer T2, and the leakage inductance L1 of the first transformer T1 and the leakage inductance L2 of the second transformer T2. 2 reaches the target leakage inductance difference, the leakage inductance L1 of the first transformer T1 divides the input voltage of the first transformer T1, and the leakage inductance L2 of the second transformer T2 divides the input voltage of the second transformer T2, so that the output voltage of the first transformer T1 reaches the first preset voltage, and the output voltage of the second transformer T2 reaches the second preset voltage, thereby making the anode high voltage KV1 output to the anode 11 reach the target anode high voltage and the cathode high voltage KV2 of the cathode 12 reach the target cathode high voltage, and the voltage difference between the absolute value voltage of the target anode high voltage and the absolute value voltage of the target cathode high voltage reaches the required target voltage difference.

[0078] The leakage inductance of the transformer is related to the structure and position of its winding. Correspondingly, the adjustment parameters of the transformer winding may be the number of turns, thickness, overlap between windings, etc. The adjustment method may be adjusted according to the experience of the staff, or obtained through calculation according to the circuit model and the structural model, and adjusted accordingly based on the calculation results.

[0079] For example, after obtaining the target voltage difference and the current initial anode high voltage KV1 and the initial cathode high voltage KV2, the theoretical leakage inductance difference corresponding to the target voltage difference can be determined by circuit simulation or numerical calculation in combination with the target voltage difference and the circuit parameters of the high voltage generator 100. For example, by using simulation software such as mutlsim simulation software and Ansys simulation software, by building a circuit module with corresponding parameters, the leakage inductance L1 of the first transformer T1, the leakage inductance L2 of the second transformer T2 and the theoretical leakage inductance difference of the leakage inductances of the two transformers can be determined, and the leakage inductances of the two transformers corresponding to the theoretical leakage inductances can be determined in combination with the structural model of the transformers. The size of the parameter to be adjusted is determined, and the two transformers are adjusted in the corresponding structures, sizes, etc. according to the adjustment parameters manually or by an adjustment device, so as to actually obtain the required target leakage inductance of the first transformer T1, the target leakage inductance of the second transformer T2 and the target leakage inductance difference of the two transformers. The leakage inductances of the two transformers respectively divide the input voltage, so that the anode high voltage KV1 output to the anode 11 reaches the target anode high voltage and the cathode high voltage KV2 output to the cathode 12 reaches the target cathode high voltage, and the voltage difference between the absolute value voltage of the target anode high voltage and the absolute value voltage of the target cathode high voltage reaches the required target voltage difference.

[0080] In an alternative embodiment, if Figure 3 As shown, step S20 specifically includes:

[0081] S21 . Determine a theoretical leakage inductance difference between the first transformer T1 and the second transformer T2 based on a target voltage difference to be output, where the theoretical leakage inductance difference is a leakage inductance difference between the theoretical leakage inductance of the first transformer T1 and the theoretical leakage inductance of the second transformer T2 .

[0082] After determining the target voltage difference to be output, the adjustment range is determined by reading the current anode high voltage KV1 and the cathode high voltage KV2, and the theoretical leakage inductance difference between the current first transformer T1 and the second transformer T2 can be simulated or calculated based on the current circuit parameters and the circuit model of the high voltage generator 100, and the theoretical leakage inductance of the first transformer T1 to be adjusted and the theoretical leakage inductance of the second transformer T2 can be determined by selection.

[0083] S22. Determine adjustment parameters of the winding of the first transformer T1 and / or adjustment parameters of the second transformer T2 based on the theoretical leakage inductance difference.

[0084] After determining the theoretical leakage inductance of the first transformer T1 and the theoretical leakage inductance of the second transformer T2, as well as the difference in theoretical leakage inductance between the first transformer T1 and the second transformer T2, the adjustment parameter size of the winding of the first transformer and / or the adjustment parameter size of the winding of the second transformer T2 can be simulated or calculated through the structural model of the transformer.

[0085] S23, adjusting the winding of the first transformer T1 based on the adjustment parameters of the first transformer T1, and / or adjusting the winding of the second transformer T2 based on the adjustment parameters of the second transformer T2, so as to adjust the target leakage inductance difference and the target voltage difference to output corresponding to the target voltage difference.

[0086] After determining the adjustment parameters of the first transformer T1 and the second transformer T2, in the actual debugging process, disconnect the circuit connection between the first transformer T1 and the second transformer T2, and adjust the actual structural parameters of the first transformer T1 and the second transformer T2 to the adjustment parameters determined in step S22 through manual or automatic adjustment by the debugging device. After the adjustment is completed, re-establish the circuit connection between the first transformer T1 and the second transformer T2, read the current anode high voltage KV1 and the cathode high voltage KV2, and calculate the absolute value voltage of the anode high voltage KV1 and the absolute value voltage of the cathode high voltage KV2, and judge whether the voltage difference between the anode 11 and the cathode 12 reaches the target voltage difference. After determining that the target voltage difference is reached, complete the debugging of the transformer and put it back into use. If the target voltage difference is not reached, further fine-tuning can be performed until the voltage difference reaches the target voltage difference.

[0087] The adjustment parameter of the first transformer T1 may be one or more, and correspondingly, the adjustment parameter of the second transformer T2 may be one or more.

[0088] In an optional embodiment, the adjustment parameters of the first transformer T1 include at least one parameter of a first overlap value N1 of the primary and secondary windings of the first transformer T1 along the direction of the wound magnetic column, a coil thickness of the primary winding of the first transformer T1, and a coil thickness of the secondary winding;

[0089] The adjustment parameters of the second transformer T2 include at least one of a second overlap value N2 of the primary and secondary windings of the second transformer T2 along the winding magnetic column direction, a coil thickness of the primary winding of the second transformer T2, and a coil thickness of the secondary winding.

[0090] Among them, the coil thickness refers to the radial dimension of the entire winding along the magnetic column direction after winding, and the overlap value refers to the overlap between the dimension of the secondary winding along the magnetic column direction and the dimension of the corresponding primary winding along the magnetic column direction.

[0091] When the coil thickness of the primary and secondary windings of the transformer remains unchanged, the greater the overlap value of the primary and secondary windings along the direction of the wound magnetic column, the better the coupling effect of the primary and secondary windings of the transformer and the smaller the leakage inductance; and the smaller the overlap value of the primary and secondary windings along the direction of the wound magnetic column, the worse the coupling effect of the primary and secondary windings of the transformer and the greater the leakage inductance.

[0092] When the overlap value of the primary and secondary windings of the transformer remains unchanged, the greater the thickness of the wire package of the primary and secondary windings, the greater the distance between the primary and secondary windings, the worse the coupling effect, and the greater the leakage inductance. On the contrary, the smaller the thickness of the wire package of the primary and secondary windings, the closer the distance between the primary and secondary windings, the better the coupling effect, and the smaller the leakage inductance.

[0093] Based on this, before the need to output different target voltage differences, the leakage inductance L1 size that needs to be adjusted for the first transformer T1 and the leakage inductance L2 size that needs to be adjusted for the second transformer T2 can be calculated or simulated based on the different target voltage differences and the circuit model, and the overlap value size and / or wire wrap thickness that needs to be adjusted for each transformer can be determined by calculation or simulation based on the leakage inductance size.

[0094] Correspondingly, after determining the target voltage difference, the first overlap value N1 of the first transformer T1 and the coil thickness of the primary and secondary windings can be adjusted according to the calculated leakage inductance L1 of the first transformer T1 and the overlap value and / or the coil thickness, and the second overlap value N2 of the second transformer T2 and the coil thickness of the primary and secondary windings can be adjusted according to the leakage inductance L2 of the second transformer T2, thereby adjusting the leakage inductance L2 and the leakage inductance difference of the output first transformer T1 and the second transformer T2, and obtaining the desired target voltage difference.

[0095] Among them, during adjustment, the overlap value and the wire package thickness can be adjusted simultaneously, or one of the parameters can be fixed and the other parameter can be adjusted, and the specific conditions and methods are not limited.

[0096] The target voltage difference may be a fixed value such as 0, 5 kV, etc., or a voltage range such as 5 kV to 10 kV. Correspondingly, the target leakage inductance difference may be adjusted to a fixed value or a difference range.

[0097] When it is necessary to balance the output voltages of the anode 11 and the cathode 12, the target voltage difference can be set to zero or close to zero, and the windings of the first transformer T1 and the second transformer T2 can be adjusted to achieve an output voltage difference of zero or close to zero, thereby achieving a balanced output voltage.

[0098] And when the absolute value voltage difference between the anode 11 and the cathode 12 is required to reach another numerical range, for example, about 5kV, the target voltage difference can be set to about 5kV, and the windings of the first transformer T1 and the second transformer T2 can be adjusted to achieve an output voltage difference close to about 5kV, thereby achieving the purpose of outputting the target voltage difference.

[0099] This method does not require the addition of an additional inverter circuit structure, simplifies the structure of the high-voltage generator 100 and the X-ray system, reduces the design cost, increases system reliability, and can be adjusted accordingly according to the output voltage requirements to meet the needs of different working scenarios.

[0100] Furthermore, the parameters of the first transformer T1 and the second transformer T2 inside the high voltage generator 100 under the initial configuration may be the same or different, that is, the leakage inductance L1 of the first transformer T1 under the initial configuration may be equal to or different from the leakage inductance L2 of the second transformer T2, and the leakage inductance difference under the initial state may be zero or non-zero.

[0101] The adjustment of the windings of the first transformer T1 and / or the windings of the second transformer T2 may occur during the factory design stage of the transformer or during actual use after leaving the factory. During the factory design stage, the structures of the first transformer T1 and the second transformer T2 are almost the same, and their internal winding parameters, positions, and materials are consistent. The leakage inductance L1 of the first transformer T1 and the leakage inductance L2 of the second transformer T2 are equal, that is, the first leakage inductance difference is 0, and the first transformer T1 and the second transformer T2 are symmetrically arranged in the high voltage generator 100.

[0102] At this time, in order to meet the power supply requirements of the anode 11 and the cathode 12, the voltage difference between the absolute value voltage of the anode high voltage KV1 and the absolute value voltage of the cathode high voltage KV2 is the target voltage difference, by adjusting the coil parameters, position, material, etc. of the windings of the first transformer T1 and the second transformer T2, the leakage inductance L1 of the first transformer T1 and the leakage inductance L2 of the second transformer T2 are changed, so that the first transformer T1 and the second transformer T2 are transformed into an asymmetric state, and finally the leakage inductance L1 of the first transformer T1 reaches the first target leakage inductance and the leakage inductance L2 of the second transformer T2 reaches the second target leakage inductance, and the difference between the first target leakage inductance and the second target leakage inductance reaches the target leakage inductance difference, the first target leakage inductance divides the input voltage of the first transformer T1, and the second target leakage inductance divides the input voltage of the second transformer, so that the voltage difference output to the anode 11 and the cathode 12 reaches the target voltage difference.

[0103] Also, when in actual use, it is necessary to output a target voltage difference of another value, or the absolute value voltage difference between the current anode high voltage KV1 and the cathode high voltage KV2 changes due to factors such as device aging and temperature during use of the high-voltage generator 100, at this time, the leakage inductance L1 of the first transformer T1 and the leakage inductance L2 of the second transformer T2 are not equal, that is, the first leakage inductance difference before adjustment is not 0. In order to meet the power supply requirements of the anode 11 and the cathode 12, the voltage difference between the absolute value voltage of the anode high voltage KV1 and the absolute value voltage of the cathode high voltage KV2 is the adjusted target voltage difference or maintained at the target voltage difference. The coil parameters, position, material, etc. of the windings of the first transformer T1 and the second transformer T2 are adjusted to change the first leakage inductance L1 and the leakage inductance L2 of the second transformer T2. The leakage inductance L1 of a transformer T1 and the leakage inductance L2 of a second transformer T2 make the first transformer T1 and the second transformer T2 change from a previous asymmetric state to another asymmetric state, and finally make the leakage inductance L1 of the first transformer T1 reach the third target leakage inductance and the leakage inductance L2 of the second transformer T2 reach the fourth target leakage inductance, and the difference between the third target leakage inductance and the fourth target leakage inductance reaches the target leakage inductance difference corresponding to the adjusted target voltage difference, or maintains at the original target leakage inductance difference, the third target leakage inductance divides the input voltage of the first transformer T1, and the fourth target leakage inductance divides the input voltage of the second transformer, so that the voltage difference output to the anode 11 and the cathode 12 reaches the target voltage difference, which can achieve the purpose of balancing the output voltage and outputting the required target voltage difference.

[0104] The leakage inductance L1 of the first transformer T1 may be greater than the leakage inductance L2 of the second transformer T2, or may be smaller than the leakage inductance L2 of the second transformer T2. The specific size is determined according to the target voltage difference to be output.

[0105] In order to achieve that the leakage inductance L1 of the first transformer T1 is greater than the leakage inductance L2 of the second transformer T2, the leakage inductance L1 of the first transformer T1 may be kept unchanged and the leakage inductance L2 of the second transformer T2 may be reduced; or, the leakage inductance L2 of the second transformer T2 may be kept unchanged and the leakage inductance L1 of the first transformer T1 may be increased; or, the leakage inductance L1 of the first transformer T1 and the leakage inductance L2 of the second transformer T2 may be changed simultaneously, but the increment of the leakage inductance L1 of the first transformer T1 is greater than the increment of the leakage inductance L2 of the second transformer T2; or, the attenuation of the leakage inductance L1 of the first transformer T1 is less than the attenuation of the leakage inductance L2 of the second transformer T2.

[0106] Similarly, in order to achieve that the leakage inductance L1 of the first transformer T1 is smaller than the leakage inductance L2 of the second transformer T2, the leakage inductance L1 of the first transformer T1 may be kept unchanged and the leakage inductance L2 of the second transformer T2 may be increased; or, the leakage inductance L2 of the second transformer T2 may be kept unchanged and the leakage inductance L1 of the first transformer T1 may be reduced; or, the leakage inductance L1 of the first transformer T1 and the leakage inductance L2 of the second transformer T2 may be changed simultaneously, but the increment of the leakage inductance L1 of the first transformer T1 is smaller than the increment of the leakage inductance L2 of the second transformer T2; or, the attenuation of the leakage inductance L1 of the first transformer T1 is greater than the attenuation of the leakage inductance L2 of the second transformer T2.

[0107] For example, before adjustment, the leakage inductance L1 of the first transformer T1 is 10μH, the leakage inductance L2 of the second transformer T2 is 5μH, and the first leakage inductance difference is 5μH. Assuming that the anode high voltage KV1 before adjustment is 60kV, and the cathode high voltage KV2 is -50kV, the voltage difference between the absolute value of the anode high voltage KV1 and the absolute value of the cathode high voltage KV2 before adjustment is 10kV. Assuming that the target anode high voltage is 55kV, the target cathode high voltage is -50kV, and the target voltage difference is 5kV. At this time, the leakage inductance L1 of the first transformer T1 can be adjusted upward to 15μH, while keeping the leakage inductance L2 of the second transformer T2 unchanged, and increasing the voltage division of the leakage inductance L1 of the first transformer T1, so that the target leakage inductance difference after adjustment becomes larger than 10μH, so that the anode high voltage KV1 is reduced from 60kV to the target anode high voltage 55kV, and the voltage difference is changed to 5kV.

[0108] Alternatively, the leakage inductance L1 of the first transformer T1 is 10μH before adjustment, the leakage inductance L2 of the second transformer T2 is 5μH, and the first leakage inductance difference is 5μH. Assuming that the anode high voltage KV1 before adjustment is 60kV, the cathode high voltage KV2 is -50kV, and the voltage difference between the absolute value of the anode high voltage KV1 and the absolute value of the cathode high voltage KV2 before adjustment is 10kV. Assuming that the target anode high voltage is 55kV, the target cathode high voltage is -50kV, and the target voltage difference is 5kV. At this time, the leakage inductance L1 of the first transformer T1 can be adjusted upward to 20μH, and the leakage inductance L2 of the second transformer T2 can be adjusted upward to 10μH. The leakage inductance difference after adjustment is maintained at 10μH, so that the anode high voltage KV1 is reduced from 60kV to the target anode high voltage 55kV, and the target voltage difference is changed to 5kV. Thereby, the target anode high voltage and the target cathode high voltage outputted finally are stabilized within the target voltage difference range, so as to achieve the purpose of balancing the output voltage and outputting the required target voltage difference.

[0109] In an alternative embodiment, if Figure 4As shown, the high voltage generator 100 includes a magnetic core 141, a first primary winding 142, a first secondary winding 143 and a second secondary winding 144, the magnetic core 141, the first primary winding 142 and the first secondary winding 143 constitute a first transformer T1, and the magnetic core 141, the first primary winding 142 and the second secondary winding 144 constitute a second transformer T2;

[0110] The first primary winding 142 is wound on the magnetic column of the magnetic core 141, and the first secondary winding 143 and the second secondary winding 144 are wound on the first primary winding 142 in parallel and at intervals along the magnetic column direction;

[0111] The adjustment parameters of the first transformer T1 include a first overlap value N1 of the first secondary winding 143 and the first primary winding 142 along the magnetic column direction, and / or include a coil thickness of the first secondary winding 143;

[0112] The adjustment parameters of the second transformer T2 include a second overlap value N2 of the second secondary winding 144 and the first primary winding 142 along the magnetic column direction, and / or include a coil thickness of the second secondary winding 144 .

[0113] In this embodiment, the first transformer T1 and the second transformer T2 are integrated and share the same magnetic core 141 and the same primary winding. The first primary winding 142 is connected to the output end of the resonant circuit 120, the first secondary winding 143 is connected to the first voltage doubling rectifier circuit 130, and the second secondary winding 144 is connected to the second voltage doubling rectifier circuit 140. The first primary winding 142 and the first secondary winding 143 are coupled through the magnetic core 141 to transmit the AC power of the output circuit of the anode high voltage KV1, and the first primary winding 142 and the second secondary winding 144 are coupled through the magnetic core 141 to transmit the AC power of the output circuit of the cathode high voltage KV2.

[0114] The structures of the first transformer T1 and the second transformer T2 in the initial configuration may be the same or different, that is, the structures of the first secondary winding 143 and the second secondary winding 144 may be the same or different.

[0115] When the first secondary winding 143 and the second secondary winding 144 have the same structure, the leakage inductance L1 of the first transformer T1 and the leakage inductance L2 of the second transformer T2 are equal in the initial configuration, that is, the initial leakage inductance difference is equal to 0, the winding thickness of the first secondary winding 143 and the winding thickness of the second secondary winding 144 are equal, and along the magnetic column direction, the first overlap value N1 of the first secondary winding 143 and the first primary winding 142 is equal to the second overlap value N2 of the second secondary winding 144 and the first primary winding 142, for example Figure 4 As shown, the first secondary winding 143 and the second secondary winding 144 are symmetrically arranged relative to the central axis of the magnetic core 141 .

[0116] When the structures of the first secondary winding 143 and the second secondary winding 144 are different, the leakage inductance L1 of the first transformer T1 and the leakage inductance L2 of the second transformer T2 in the initial configuration are not equal, that is, the initial leakage inductance difference is not equal to zero, the winding thickness of the first primary winding 142 and the winding thickness of the second secondary winding 144 are not equal, and / or the first overlap value N1 and the second overlap value N2 are not equal, for example Figure 5 and Figure 6 As shown, a first overlap value N1 between the first secondary winding 143 and the first primary winding 142 is smaller than a second overlap value N2 between the second secondary winding 144 and the first primary winding 142 .

[0117] The first primary winding 142 , the first secondary winding 143 , and the second secondary winding 144 may each be composed of a group of windings, or may be composed of a plurality of groups of windings connected in series and in parallel.

[0118] The magnetic core 141 may be a U-shaped magnetic core 141 , an E-shaped magnetic core 141 , an RM-shaped magnetic core 141 , a PQ-shaped magnetic core 141 , or the like.

[0119] Based on the structure of the first transformer T1 and the second transformer T2, in order to achieve the output voltage of the anode 11 and the cathode 12 to reach the target voltage, and the output voltage difference to reach the target voltage difference, so as to meet voltage balance or different power supply requirements, when adjusting the leakage inductance L1 of the first transformer T1, the first overlap value N1 of the first transformer T1 or the coil thickness of the first secondary winding 143 can be adjusted, and correspondingly, when adjusting the leakage inductance L2 of the second transformer T2, the second overlap value N2 of the second transformer T2 or the coil thickness of the second secondary winding 144 can be adjusted, so as to adjust the target leakage inductance difference corresponding to the output, and the target voltage difference corresponding to the target leakage inductance difference.

[0120] In another alternative embodiment, if Fig. 9 As shown, the high voltage generator 100 includes a magnetic core 141, a first primary winding 142, a first secondary winding 143 and a second secondary winding 144, the magnetic core 141, the first primary winding 142 and the first secondary winding 143 constitute a first transformer T1, and the magnetic core 141, the first primary winding 142 and the second secondary winding 144 constitute a second transformer T2;

[0121] The first primary winding 142 is wound on the magnetic column of the magnetic core 141 , the second secondary winding 144 is wound on the first primary winding 142 , and the first secondary winding 143 is wound on the second secondary winding 144 .

[0122] The adjustment parameters of the first transformer T1 include a first overlap value N1 of the first secondary winding 143 and the first primary winding 142 along the magnetic column direction, and / or include a coil thickness of the first secondary winding 143;

[0123] The adjustment parameters of the second transformer T2 include a second overlap value N2 of the second secondary winding 144 and the first primary winding 142 along the magnetic column direction, and / or include a coil thickness of the second secondary winding 144 .

[0124] In this embodiment, the first secondary winding 143 and the second secondary winding 144 share the same primary winding and magnetic core 141, and the first primary winding 142, the first secondary winding 143 and the second secondary winding 144 are wound sequentially. The structures of the first transformer T1 and the second transformer T2 in the initial configuration may be the same or different, that is, the structures of the first secondary winding 143 and the second secondary winding 144 may be the same or different.

[0125] The first primary winding 142 is wound on the inner circle, the first secondary winding 143 and the second secondary winding 144 are wound on the outer circle and are spaced apart along the first direction X1. Along the direction of the magnetic column, a first overlap value N1 of the first secondary winding 143 and the first primary winding 142 may be equal to or different from a second overlap value N2 of the second secondary winding 144 and the first primary winding 142.

[0126] When the first secondary winding 143 and the second secondary winding 144 have the same structure, the leakage inductance L1 of the first transformer T1 and the leakage inductance L2 of the second transformer T2 are equal in the initial configuration, that is, the initial leakage inductance difference is equal to 0, the winding thickness of the first secondary winding 143 and the winding thickness of the second secondary winding 144 are equal, and along the direction of the magnetic column, the first overlap value N1 of the first secondary winding 143 and the first primary winding 142 is equal to the second overlap value N2 of the second secondary winding 144 and the first primary winding 142.

[0127] When the structures of the first secondary winding 143 and the second secondary winding 144 are different, the leakage inductance L1 of the first transformer T1 and the leakage inductance L2 of the second transformer T2 under the initial configuration are not equal, that is, the initial leakage inductance difference is not equal to zero, the winding thickness of the first primary winding 142 and the winding thickness of the second secondary winding 144 are not equal, and / or the first overlap value N1 and the second overlap value N2 are not equal. It is assumed that the first overlap value N1 of the first secondary winding 143 and the first primary winding 142 is less than the second overlap value N2 of the second secondary winding 144 and the first primary winding 142.

[0128] The first primary winding 142 , the first secondary winding 143 , and the second secondary winding 144 may each be composed of a group of windings, or may be composed of a plurality of groups of windings connected in series and in parallel.

[0129] The magnetic core 141 may be a U-shaped magnetic core 141 , an E-shaped magnetic core 141 , an RM-shaped magnetic core 141 , a PQ-shaped magnetic core 141 , or the like.

[0130] Based on the structure of the first transformer T1 and the second transformer T2, in order to achieve the output voltage of the anode 11 and the cathode 12 to reach the target voltage, and the output voltage difference to reach the target voltage difference, so as to meet voltage balance or different power supply requirements, when adjusting the leakage inductance L1 of the first transformer T1, the first overlap value N1 of the first transformer T1 or the coil thickness of the first secondary winding 143 can be adjusted, and correspondingly, when adjusting the leakage inductance L2 of the second transformer T2, the second overlap value N2 of the second transformer T2 or the coil thickness of the second secondary winding 144 can be adjusted, so as to adjust the target leakage inductance difference corresponding to the output, and the target voltage difference corresponding to the target leakage inductance difference.

[0131] In another alternative embodiment, if Fig.10 As shown, the high voltage generator 100 includes a magnetic core 141, a first primary winding 142, a second primary winding 145, a first secondary winding 143 and a second secondary winding 144. The magnetic core 141, the first primary winding 142 and the first secondary winding 143 constitute a first transformer T1, and the magnetic core 141, the second primary winding 145 and the second secondary winding 144 constitute a second transformer T2.

[0132] The first primary winding 142 is wound on the first magnetic column 1411 of the magnetic core 141, the first secondary winding 143 is wound on the first primary winding 142, the second primary winding 145 is wound on the second magnetic column 1412 of the magnetic core 141, the second secondary winding 144 is wound on the second primary winding 145, and the first magnetic column 1411 and the second magnetic column 1412 are arranged opposite to each other;

[0133] The adjustment parameters of the first transformer T1 include a first overlap value N1 of the first secondary winding 143 and the first primary winding 142 along the magnetic column direction, and / or include a coil thickness of the first secondary winding 143;

[0134] The adjustment parameters of the second transformer T2 include a second overlap value N2 of the second secondary winding 144 and the second primary winding 145 along the magnetic column direction, and / or include a coil thickness of the second secondary winding 144 .

[0135] In this embodiment, the first transformer T1 and the second transformer T2 are integrated and share the same magnetic core 141, but use different primary windings, that is, they are wound on different magnetic column positions on the same magnetic core 141. The first primary winding 142 and the second primary winding 145 are respectively connected to the output end of the resonant circuit 120, the first secondary winding 143 is connected to the first voltage doubling rectifier circuit 130, and the second secondary winding 144 is connected to the second voltage doubling rectifier circuit 140. The first primary winding 142 and the first secondary winding 143 are coupled through the magnetic core 141 to transmit the AC power supply of the output circuit of the anode high voltage KV1, and the second primary winding 145 and the second secondary winding 144 are coupled through the magnetic core 141 to transmit the AC power supply of the output circuit of the cathode high voltage KV2.

[0136] The first primary winding 142 and the second primary winding 145 are wound on the inner circle, and the first secondary winding 143 and the second secondary winding 144 are wound on the outer circle. Along the direction of the magnetic column, the overlap value of the first secondary winding 143 and the first primary winding 142 may be equal to or different from the overlap value of the second secondary winding 144 and the second primary winding 145. The turns ratio of the first primary winding 142 and the first secondary winding 143 may be equal to the turns ratio of the second primary winding 145 and the second secondary winding 144. The number of turns of the first primary winding 142 and the second primary winding 145 may be equal or different, and the number of turns of the first secondary winding 143 and the second secondary winding 144 may be equal or different.

[0137] The first primary winding 142 , the second primary winding 145 , the first secondary winding 143 and the second secondary winding 144 may each be composed of one group of windings, or may be composed of a plurality of groups of windings connected in series and in parallel.

[0138] The magnetic core 141 may be a U-shaped magnetic core 141 , an E-shaped magnetic core 141 , an RM-shaped magnetic core 141 , a PQ-shaped magnetic core 141 , or the like.

[0139] Based on the structure of the first transformer T1 and the second transformer T2, in order to achieve the output voltage of the anode 11 and the cathode 12 to reach the target voltage, and the output voltage difference to reach the target voltage difference, so as to meet voltage balance or different power supply requirements, when adjusting the leakage inductance L1 of the first transformer T1, the first overlap value N1 of the first transformer T1 or the coil thickness of the first secondary winding 143 can be adjusted, and correspondingly, when adjusting the leakage inductance L2 of the second transformer T2, the second overlap value N2 of the second transformer T2 or the coil thickness of the first secondary winding 143 can be adjusted, so as to adjust the target leakage inductance difference corresponding to the output, and the target voltage difference corresponding to the target leakage inductance difference.

[0140] Based on this, when it is necessary to output a target voltage difference, the leakage inductance L1 of the first transformer T1 and the leakage inductance L2 of the second transformer T2, as well as the overlap value and / or the coil thickness value corresponding to the leakage inductance can be calculated or simulated based on the target voltage difference and the circuit model, and the overlap value and / or the coil thickness of the two transformers can be adjusted accordingly based on the determined values.

[0141] Among them, during adjustment, the overlap value and the wire package thickness can be adjusted simultaneously, or one of the parameters can be fixed and the other parameter can be adjusted, and the specific conditions and methods are not limited.

[0142] Based on the structure of the above-mentioned high voltage generator 100, step S23 specifically includes:

[0143] S231, adjusting the first coincidence value N1 based on the adjustment parameters of the first transformer T1, and / or adjusting the second coincidence value N2 based on the adjustment parameters of the second transformer T2, so that the coincidence difference between the first coincidence value N1 and the second coincidence value N2 corresponds to the target leakage inductance difference, wherein the coincidence difference is not zero.

[0144] That is, in order to output the target voltage difference, the first coincidence value N1 of the first transformer T1 and the coincidence value of the second transformer T2 can be relatively adjusted, and different coincidence differences can be adjusted, so that the leakage inductance difference between the leakage inductance L1 of the first transformer T1 and the leakage inductance L2 of the second transformer T2 reaches the target leakage inductance difference, and then the output target voltage difference is adjusted.

[0145] For example, assuming that the first coincidence value N1 is equal to the second coincidence value N2 in the initial configuration, and the coil thickness of the two secondary windings is equal, that is, the leakage inductance L1 of the first transformer T1 is equal to the leakage inductance L2 of the second transformer T2. In order to achieve output voltage balance or achieve a target voltage difference less than zero, when the coil thickness of the first secondary winding 143 and the second secondary winding 144 is equal, by adjusting the first coincidence value N1 to be less than the second coincidence value N2, the leakage inductance L1 of the first transformer T1 and / or the leakage inductance L2 of the second transformer T2 are changed, so that the leakage inductance L1 of the first transformer T1 is greater than the leakage inductance L2 of the second transformer T2, and the adjusted leakage inductance L1 of the first transformer T1 performs voltage division processing on the output circuit of the anode high voltage KV1, and the voltage division value of the leakage inductance L1 of the first transformer T1 is greater than the voltage division value of the leakage inductance L2 of the second transformer T2, so that the absolute value voltage of the target anode high voltage finally output to the anode 11 is close to or equal to the absolute value voltage of the target cathode high voltage, so as to achieve the purpose of balancing the output voltage or outputting the target voltage difference less than zero.

[0146] Among them, when the coil thickness of the first secondary winding 143 and the second secondary winding 144 is equal, in order to achieve that the first overlap value N1 is less than the second overlap value N2, the first overlap value N1 of the first primary winding 142 and the first secondary winding 143 can be kept unchanged, and the second overlap value N2 of the first primary winding 142 and the second secondary winding 144 can be increased; or, the second overlap value N2 of the second secondary winding 144 and the first primary winding 142 can be kept unchanged, and the second overlap value N2 of the first primary winding 142 and the second secondary winding 144 can be reduced. The first overlap value N1 of the first secondary winding 143; or, the first overlap value N1 and the second overlap value N2 change simultaneously, but the attenuation of the first overlap value N1 is greater than the increment of the attenuation of the second overlap value N2; or, the increment of the first overlap value N1 is less than the increment of the second overlap value N2; thereby, the changing trend of the overlap difference between the first overlap value N1 and the second overlap value N2 is correlated with the changing trend of the difference between the absolute values ​​of the initial anode high voltage KV1 and the initial cathode high voltage KV2.

[0147] Wherein, the coil thickness of the two secondary windings is equal, in order to achieve that the first overlap value N1 is smaller than the second overlap value N2, for example Figure 5 As shown, the first secondary winding 143 and the second secondary winding 144 can be moved simultaneously along the second direction X2. At this time, the first coincidence value N1 becomes smaller, and the second coincidence value N2 remains unchanged. Therefore, the first coincidence value N1 is smaller than the second coincidence value N2, the leakage inductance L1 of the first transformer T1 increases, and the leakage inductance L2 of the second transformer T2 remains unchanged, and the voltage division value of the leakage inductance L1 of the first transformer T1 is larger than the voltage division value of the leakage inductance L2 of the second transformer T2.

[0148] Or Figure 6 and Fig.11 As shown, the position of the second secondary winding 144 is kept unchanged, and the first secondary winding 143 is moved along the second direction X2. At this time, the first coincidence value N1 becomes smaller, and the second coincidence value N2 remains unchanged. Therefore, the first coincidence value N1 is smaller than the second coincidence value N2, the leakage inductance L1 of the first transformer T1 increases, and the leakage inductance L2 of the second transformer T2 remains unchanged, and the voltage division value of the leakage inductance L1 of the first transformer T1 is larger than the voltage division value of the leakage inductance L2 of the second transformer T2.

[0149] Or Figure 7 As shown, the first secondary winding 143 is moved along the second direction X2 and the second secondary winding 144 is moved along the first direction X1, and the offset of the first secondary winding 143 is greater than the offset of the second secondary winding 144, therefore, the first coincidence value N1 is less than the second coincidence value N2, the leakage inductance L1 of the first transformer T1 and the leakage inductance L2 of the second transformer T2 are both increased, but the increment of the leakage inductance L1 of the first transformer T1 is greater than the increment of the leakage inductance L2 of the second transformer T2, and the voltage divider value of the leakage inductance L1 of the first transformer T1 is greater than the voltage divider value of the leakage inductance L2 of the second transformer T2.

[0150] Similarly, when the target voltage difference to be output is greater than zero, that is, the absolute value voltage of the target anode high voltage finally output is greater than the absolute value voltage of the target cathode high voltage, the leakage inductance L1 of the first transformer T1 needs to be smaller than the leakage inductance L2 of the second transformer T2. When the coil thickness of the first secondary winding 143 and the second secondary winding 144 are equal, by adjusting the first coincidence value N1 to be greater than the second coincidence value N2, the leakage inductance L1 of the first transformer T1 and / or the leakage inductance L2 of the second transformer T2 are changed, so that the leakage inductance L1 of the first transformer T1 is smaller than the leakage inductance L2 of the second transformer T2. The adjusted leakage inductance L1 of the first transformer T1 performs voltage division processing on the output circuit of the anode high voltage KV1. The voltage division value of the leakage inductance L1 of the first transformer T1 is smaller than the voltage division value of the leakage inductance L2 of the second transformer T2, so that the absolute value voltage of the target anode high voltage finally output to the anode 11 is greater than the absolute value voltage of the target cathode high voltage, thereby achieving the purpose of outputting a target voltage difference greater than zero.

[0151] Among them, when the coil thickness of the first secondary winding 143 and the second secondary winding 144 are equal, in order to achieve that the first overlap value N1 is greater than the second overlap value N2, the first overlap value N1 can be kept unchanged and the second overlap value N2 can be reduced; or, the second overlap value N2 can be kept unchanged and the first overlap value N1 can be increased; or, the first overlap value N1 and the second overlap value N2 can be changed at the same time, but the increment is greater than the second overlap value N2; thereby, the change trend of the overlap difference between the first overlap value N1 and the second overlap value N2 is correlated with the change trend of the difference between the absolute values ​​of the initial anode high voltage KV1 and the initial cathode high voltage KV2.

[0152] The wire package thickness of the two secondary windings is equal, which can be referred to Figure 4 and Fig.10 It is understood that in order to achieve the first overlap value N1 being greater than the second overlap value N2, the first secondary winding 143 and the second secondary winding 144 can be moved simultaneously along the first direction X1. At this time, the first overlap value N1 remains unchanged, and the second overlap value N2 decreases. Therefore, the first overlap value N1 is greater than the second overlap value N2, the leakage inductance L1 of the first transformer T1 remains unchanged, and the leakage inductance L2 of the second transformer T2 increases, and the voltage divider value of the leakage inductance L2 of the second transformer T2 is greater than the voltage divider value of the leakage inductance L1 of the first transformer T1.

[0153] Alternatively, the position of the first secondary winding 143 can be kept unchanged, and the second secondary winding 144 can be moved along the first direction X1. At this time, the first coincidence value N1 remains unchanged, and the second coincidence value N2 becomes smaller. Therefore, the first coincidence value N1 is greater than the second coincidence value N2, the leakage inductance L1 of the first transformer T1 remains unchanged, and the leakage inductance L2 of the second transformer T2 increases, and the voltage division value of the leakage inductance L2 of the second transformer T2 is greater than the voltage division value of the leakage inductance L1 of the first transformer T1.

[0154] Alternatively, the second secondary winding 144 can be moved along the first direction X1 and the first secondary winding 143 can be moved along the second direction X2, and the offset of the second secondary winding 144 is greater than the offset of the first secondary winding 143. Therefore, the second coincidence value N2 is less than the first coincidence value N1, and the leakage inductance L1 of the first transformer T1 and the leakage inductance L2 of the second transformer T2 are both increased, but the increment of the leakage inductance L2 of the second transformer T2 is greater than the increment of the leakage inductance L1 of the first transformer T1, and the voltage divider value of the leakage inductance L2 of the second transformer T2 is greater than the voltage divider value of the leakage inductance L1 of the first transformer T1.

[0155] And / or, S231, adjusting the coil thickness of the first secondary winding 143 based on the adjustment parameters of the first transformer T1 and / or adjusting the coil thickness of the second secondary winding 144 based on the adjustment parameters of the second transformer T2, so that the thickness difference between the coil thickness of the first secondary winding 143 and the coil thickness of the second secondary winding 144 corresponds to the target leakage inductance difference, so as to adjust the output to correspond to the target leakage inductance difference and the target voltage difference, wherein the thickness difference is not zero.

[0156] That is, in order to output the target voltage difference, the coil thickness of the first secondary winding 143 of the first transformer T1 and the coil thickness of the second transformer T2 can be relatively adjusted, and the different coil thicknesses can be adjusted so that the leakage inductance difference between the leakage inductance L1 of the first transformer T1 and the leakage inductance L2 of the second transformer T2 reaches the target leakage inductance difference, thereby adjusting the output target voltage difference.

[0157] For example, assuming that in the initial configuration, when the first coincidence value N1 is equal to the second coincidence value N2, the coil thicknesses of the two secondary windings are equal, that is, the leakage inductance L1 of the first transformer T1 is equal to the leakage inductance L2 of the second transformer T2. In order to achieve output voltage balance or to achieve a target voltage difference value less than zero, when the first coincidence value N1 is equal to the second coincidence value N2, the coil thicknesses of the two secondary windings are adjusted, and the coil thickness of the first secondary winding 143 is greater than the coil thickness of the second secondary winding 144, and the leakage inductance L1 of the first transformer T1 and / or the leakage inductance L2 of the second transformer T2 are changed. The leakage inductance L2 of the first transformer T2 makes the leakage inductance L1 of the first transformer T1 greater than the leakage inductance L2 of the second transformer T2. The adjusted leakage inductance L1 of the first transformer T1 performs voltage division processing on the output circuit of the anode high voltage KV1. The voltage division value of the leakage inductance L1 of the first transformer T1 is greater than the voltage division value of the leakage inductance L2 of the second transformer T2, so that the absolute value voltage of the target anode high voltage finally output to the anode 11 is close to or equal to the absolute value voltage of the target cathode high voltage, thereby achieving the purpose of balancing the output voltage or outputting the target voltage difference less than zero.

[0158] When the first overlap value N1 is equal to the second overlap value N2, Figure 4 and Fig.10It is understood that in order to achieve that the coil thickness of the first secondary winding 143 is greater than the coil thickness of the second secondary winding 144, the coil thickness of the first secondary winding 143 can be maintained and the coil thickness of the second secondary winding 144 can be reduced; or, the coil thickness of the second secondary winding 144 can be maintained and the coil thickness of the first secondary winding 143 can be increased; or, the coil thickness of the first secondary winding 143 and the second secondary winding 144 can be increased at the same time, and the increment of the coil thickness of the first secondary winding 143 is greater than the increment of the coil thickness of the second secondary winding 144; or, the coil thickness of the first secondary winding 143 and the second secondary winding 144 can be reduced at the same time, and the attenuation of the coil thickness of the first secondary winding 143 is less than the attenuation of the coil thickness of the second secondary winding 144.

[0159] When the first overlap value N1 is equal to the second overlap value N2, and the coil thickness of the first secondary winding 143 is greater than the thickness of the second secondary winding 144, the first secondary winding 143 is at a large distance from the corresponding primary winding, and has a large leakage inductance, while the second secondary winding 144 is at a small distance from the corresponding primary winding, and has a small leakage inductance. The voltage divider value of the leakage inductance L1 of the first transformer T1 is greater than the voltage divider value of the leakage inductance L2 of the second transformer T2.

[0160] Similarly, when the target voltage difference to be output is greater than zero, that is, the absolute value of the target anode high voltage output is greater than the absolute value of the target cathode high voltage, the leakage inductance L1 of the first transformer T1 can be smaller than the leakage inductance L2 of the second transformer T2. When the first coincidence value N1 is equal to the second coincidence value N2, as shown in FIG. Figure 8 or Fig.12 As shown, by adjusting the coil thickness of the first secondary winding 143 to be smaller than the coil thickness of the second secondary winding 144, the leakage inductance L1 of the first transformer T1 and / or the leakage inductance L2 of the second transformer T2 are changed, so that the leakage inductance L1 of the first transformer T1 is smaller than the leakage inductance L2 of the second transformer T2, and the leakage inductance L1 of the adjusted first transformer T1 performs voltage division processing on the output circuit of the anode high voltage KV1, and the voltage division value of the leakage inductance L1 of the first transformer T1 is smaller than the voltage division value of the leakage inductance L2 of the second transformer T2, so that the absolute value voltage of the target anode high voltage finally output to the anode 11 is greater than the absolute value voltage of the target cathode high voltage, thereby achieving the purpose of outputting a target voltage difference greater than zero.

[0161] Similarly, when the first overlap value N1 is equal to the second overlap value N2, in order to achieve that the coil thickness of the first secondary winding 143 is less than the coil thickness of the second secondary winding 144, reference may be made to Figure 4 and Fig.10It is understood that the coil thickness of the first secondary winding 143 can be maintained and the coil thickness of the second secondary winding 144 can be increased; or, the coil thickness of the second secondary winding 144 can be maintained and the coil thickness of the first secondary winding 143 can be reduced; or, the coil thickness of the first secondary winding 143 and the second secondary winding 144 can be increased at the same time, and the increment of the coil thickness of the first secondary winding 143 is smaller than the increment of the coil thickness of the second secondary winding 144; or, the coil thickness of the first secondary winding 143 and the second secondary winding 144 can be reduced at the same time, and the attenuation of the coil thickness of the first secondary winding 143 is greater than the attenuation of the coil thickness of the second secondary winding 144.

[0162] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: in the above-mentioned load balancing method of the X-ray tube 10, the high-voltage generator 100 is connected to the cathode 12 and the anode 11 of the X-ray tube 10, and at the same time, the cathode high voltage KV2 and the anode high voltage KV1 with related polarities are provided to the X-ray tube 10, and the windings of the first transformer T1 and the second transformer T2 of the high-voltage generator 100 are adjusted based on the target voltage difference to be output, so as to change the difference between the leakage inductance L1 of the first transformer T1 and the leakage inductance L2 of the second transformer T2 to reach the target leakage inductance difference, and the leakage inductance L2 of the first transformer T1 and the second transformer T2 after adjustment respectively affects the anode high voltage KV2 and the cathode high voltage KV1 of the X-ray tube 10. The output circuit of the cathode high voltage KV1 and the output circuit of the cathode high voltage KV2 are correspondingly divided, so that the voltage difference between the target anode high voltage and the target cathode high voltage of the adjusted X-ray tube 10 reaches the target voltage difference. When it is necessary to achieve the purpose of balanced output voltage, the target voltage difference can be set to zero or close to zero, and the windings of the first transformer T1 and the second transformer T2 are adjusted to achieve the output voltage difference reaching the target voltage difference, so as to achieve the purpose of balanced output voltage. In addition, the method does not need to add an additional inverter circuit structure, simplifies the structure of the high voltage generator 100 and the X-ray system, reduces the design cost, and increases the system reliability.

[0163] like Figure 1 As shown, a second aspect of an embodiment of the present invention provides a load-balanced X-ray system, comprising:

[0164] An X-ray tube 10, the X-ray tube 10 comprises a cathode 12 and an anode 11;

[0165] A high voltage generator 100, the high voltage generator 100 is used to connect the cathode 12 and the anode 11 of the X-ray tube 10, and provide a cathode high voltage KV2 to the cathode 12 of the X-ray tube 10 and provide an anode high voltage KV1 to the anode 11 of the X-ray tube 10, the voltage polarities of the cathode high voltage KV2 and the anode high voltage KV1 are opposite, the high voltage generator 100 includes a first transformer T1 and a second transformer T2, the first transformer T1 is arranged in the output circuit of the anode high voltage KV1, and the second transformer T2 is arranged in the output circuit of the cathode high voltage KV2;

[0166] The leakage inductance difference between the leakage inductance L1 of the first transformer T1 and the leakage inductance L2 of the second transformer T2 is a target leakage inductance difference corresponding to the target voltage difference. The target voltage difference is the voltage difference between the absolute value voltage of the target anode high voltage of the anode 11 and the absolute value voltage of the target cathode high voltage of the cathode 12. The target leakage inductance difference is not zero.

[0167] In this embodiment, Figure 1 As shown, the high voltage generator 100 includes an inverter circuit 110, a resonant circuit 120, a transformer circuit, a first voltage doubling rectifier circuit 130 and a second voltage doubling rectifier circuit 140. The transformer circuit includes a first transformer T1 and a second transformer T2. The output end of the inverter circuit 110 is connected to the input end of the resonant circuit 120. The output end of the resonant circuit 120 is respectively connected to the input ends of the first transformer T1 and the second transformer T2. The output end of the first transformer T1 is connected to the input end of the first voltage doubling rectifier circuit 130. The first voltage doubling rectifier circuit 130 outputs an anode high voltage KV1 and an anode 11 current to the anode 11 of the X-ray tube 10. The output end of the second transformer T2 is connected to the input end of the second voltage doubling rectifier circuit 140. The second voltage doubling rectifier circuit 140 outputs a cathode high voltage KV2 and a cathode 12 current to the cathode 12 of the X-ray tube 10.

[0168] The inverter circuit 110 is composed of a plurality of parallel inverter bridge arms, the inverter bridge arms including bridge arm switches connected in series, the midpoint of the bridge arm switches being the output end of the inverter circuit 110, wherein Figure 1 As shown, the inverter circuit 110 includes a first inverter bridge arm and a second inverter bridge arm connected in parallel, the first inverter bridge arm includes a first bridge arm upper switch Q1 and a first bridge arm lower switch Q3 connected in series, and the second inverter bridge arm includes a second bridge arm upper switch Q2 and a second bridge arm lower switch Q4 connected in series. The inverter circuit 110 inverts the input DC power supply and outputs AC power to the resonant circuit 120.

[0169] The resonant circuit 120 is composed of corresponding inductors and capacitors, such as an LCC resonant circuit, etc. The resonant circuit 120 performs resonant conversion on the input AC power supply to improve power conversion efficiency.

[0170] Since the first transformer T1 and the second transformer T2 realize the voltage boost of the AC power supply, the primary windings of the first transformer T1 and the second transformer T2 are connected to the resonant circuit 120. The first transformer T1 and the second transformer T2 can use the same magnetic core or use independent magnetic cores. Correspondingly, the first transformer T1 and the second transformer T2 can share the same primary winding or include different primary windings respectively, that is, a transformer with independent cathode and anode can be selected, or a transformer with integrated cathode and anode can be set. The secondary winding of the first transformer T1 is connected to the first voltage doubling rectifier circuit 130, and the secondary winding of the second transformer T2 is connected to the second voltage doubling rectifier circuit 140. The first voltage doubling rectifier circuit 130 and the second voltage doubling rectifier circuit 140 are used to realize the rectification of the AC power supply and amplify the output according to a preset multiple. The voltage doubling rectifier circuit can adopt corresponding rectifier bridge, amplifier circuit and other structures.

[0171] In practical applications, transformers all have an obvious leakage inductance. The generated leakage inductance is connected in series in the output circuit and divides the input voltage. The impedance value of the leakage inductance is Z=jωL, where ω is the frequency of the inverter circuit, j is an imaginary unit, and L is the inductance value of the leakage inductance. The larger the inductance value of the leakage inductance, the larger the impedance value of the leakage inductance, and the larger the voltage division value. When the input voltage and current of the first transformer T1 and the second transformer T2 are equal, the transformer with a larger leakage inductance has a smaller voltage at its output end.

[0172] When configuring and connecting the high-voltage generator 100, based on the load balancing method of the X-ray tube 10, the target voltage difference to be output can be obtained in advance, and the windings of the first transformer T1 and the windings of the second transformer T2 are adjusted during the configuration and connection process, so as to change the leakage inductance L1 of the first transformer T1 and the leakage inductance L2 of the second transformer T2, so that the difference between the leakage inductance L1 of the first transformer T1 and the leakage inductance L2 of the second transformer T2 reaches the target leakage inductance difference, the leakage inductance L1 of the first transformer T1 divides the input voltage of the first transformer T1, and the leakage inductance L2 of the second transformer T2 divides the input voltage of the second transformer T2, so that the output voltage of the first transformer T1 reaches the first preset voltage, and the output voltage of the second transformer T2 reaches the second preset voltage, thereby making the anode high voltage KV1 output to the anode 11 reach the target anode high voltage and the cathode high voltage KV2 of the cathode 12 reach the target cathode high voltage, and the voltage difference between the absolute value voltage of the target anode high voltage and the absolute value voltage of the target cathode high voltage reaches the required target voltage difference.

[0173] The leakage inductance of the transformer is related to the structure and position of its winding. Correspondingly, the adjustment parameters of the transformer winding may be the number of turns, thickness, overlap between windings, etc. The adjustment method may be adjusted according to the experience of the staff, or obtained through calculation according to the circuit model and the structural model, and adjusted accordingly based on the calculation results.

[0174] For example, after obtaining the target voltage difference and the current initial anode high voltage KV1 and the initial cathode high voltage KV2, the theoretical leakage inductance difference corresponding to the target voltage difference can be determined by circuit simulation or numerical calculation in combination with the target voltage difference and the circuit parameters of the high voltage generator 100. For example, by using simulation software such as mutlsim simulation software and Ansys simulation software, by building a circuit module with corresponding parameters, the leakage inductance L1 of the first transformer T1, the leakage inductance L2 of the second transformer T2 and the theoretical leakage inductance difference of the leakage inductances of the two transformers can be determined, and the leakage inductances of the two transformers corresponding to the theoretical leakage inductances can be determined in combination with the structural model of the transformers. The size of the parameter to be adjusted is determined, and the two transformers are adjusted in the corresponding structures, sizes, etc. according to the adjustment parameters manually or by an adjustment device, so as to actually obtain the required target leakage inductance of the first transformer T1, the target leakage inductance of the second transformer T2 and the target leakage inductance difference of the two transformers. The leakage inductances of the two transformers respectively divide the input voltage, so that the anode high voltage KV1 output to the anode 11 reaches the target anode high voltage and the cathode high voltage KV2 output to the cathode 12 reaches the target cathode high voltage, and the voltage difference between the absolute value voltage of the target anode high voltage and the absolute value voltage of the target cathode high voltage reaches the required target voltage difference.

[0175] In order to improve the adjustment efficiency, in an optional embodiment, the load-balanced X-ray system further includes:

[0176] The regulating device is connected to the high voltage generator 100, and is used to implement the steps of the load balancing method.

[0177] The regulating device may include a sampling circuit, a control circuit, etc. The sampling circuit is used to sample the anode high voltage KV1, the cathode high voltage KV2, the input voltage of the first transformer T1, etc. The control circuit can obtain the target voltage difference through a load balancing method, calculate the theoretical leakage inductance difference between the first transformer T1 and the second transformer T2, and the adjustment parameters of the winding of the first transformer T1 and the adjustment parameters of the winding of the second transformer T2, and adjust the first transformer T1 and the second transformer T2 based on the adjustment parameters, and read the anode high voltage KV1 and the cathode high voltage KV2 during the adjustment process, and calculate the absolute value voltage of the anode high voltage KV1 and the absolute value voltage of the cathode high voltage KV2, and judge whether the voltage difference between the anode 11 and the cathode 12 reaches the target voltage difference. After determining that the target voltage difference is reached, the transformer is debugged and put back into use. If the target voltage difference is not reached, further fine-tuning can be performed until the voltage difference reaches the target voltage difference.

[0178] In an alternative embodiment, if Figure 4As shown, the high voltage generator 100 includes a magnetic core 141, a first primary winding 142, a first secondary winding 143 and a second secondary winding 144, the magnetic core 141, the first primary winding 142 and the first secondary winding 143 constitute a first transformer T1, and the magnetic core 141, the first primary winding 142 and the second secondary winding 144 constitute a second transformer T2;

[0179] The first primary winding 142 is wound on the magnetic column of the magnetic core 141 , and the first secondary winding 143 and the second secondary winding 144 are wound on the first primary winding 142 in parallel and at intervals along the magnetic column direction.

[0180] The overlap difference between the first overlap value N1 and the second overlap value N2 is a target overlap difference corresponding to the target leakage inductance difference, and / or the thickness difference between the coil thickness of the first secondary winding 143 and the coil thickness of the second secondary winding 144 is a target thickness difference corresponding to the target leakage inductance difference, and the target overlap difference and / or the target thickness difference are not zero;

[0181] The first overlap value N1 is the overlap value of the first secondary winding 143 and the first primary winding 142 along the magnetic column direction, and the second overlap value N2 is the overlap value of the second secondary winding 144 and the first primary winding 142 along the magnetic column direction.

[0182] In this embodiment, the coil thickness refers to the radial dimension of the entire winding after winding along the magnetic column direction, and the overlap value refers to the overlap between the dimension of the secondary winding along the magnetic column direction and the dimension of the corresponding primary winding along the magnetic column direction.

[0183] The first transformer T1 and the second transformer T2 are integrated and share the same magnetic core 141 and the same primary winding. The first primary winding 142 is connected to the output end of the resonant circuit 120, the first secondary winding 143 is connected to the first voltage doubling rectifier circuit 130, and the second secondary winding 144 is connected to the second voltage doubling rectifier circuit 140. The first primary winding 142 and the first secondary winding 143 are coupled through the magnetic core 141 to transmit the AC power supply of the output circuit of the anode high voltage KV1, and the first primary winding 142 and the second secondary winding 144 are coupled through the magnetic core 141 to transmit the AC power supply of the output circuit of the cathode high voltage KV2.

[0184] The first primary winding 142 , the first secondary winding 143 , and the second secondary winding 144 may each be composed of a group of windings, or may be composed of a plurality of groups of windings connected in series and in parallel.

[0185] The magnetic core 141 may be a U-shaped magnetic core 141 , an E-shaped magnetic core 141 , an RM-shaped magnetic core 141 , a PQ-shaped magnetic core 141 , or the like.

[0186] Before the need to output different target voltage differences, the adjustment device can calculate or simulate the leakage inductance L1 required to be adjusted for the first transformer T1 and the leakage inductance L2 required to be adjusted for the second transformer T2 based on the different target voltage differences and the circuit model, and determine the overlap value size and / or wire wrap thickness required to be adjusted for each transformer based on the leakage inductance size by calculation or simulation.

[0187] Before the configuration connection, based on the structure of the first transformer T1 and the second transformer T2, in order to achieve the output voltage of the anode 11 and the cathode 12 to reach the target voltage, and the output voltage difference to reach the target voltage difference, so as to meet the voltage balance or different power supply requirements, when adjusting the leakage inductance L1 of the first transformer T1, the first overlap value N1 of the first transformer T1 or the coil thickness of the first secondary winding 143 can be adjusted based on the overlap value size or coil thickness determined by calculation or simulation. Correspondingly, when adjusting the leakage inductance L2 of the second transformer T2, the overlap value N2 of the second transformer T2 can be adjusted based on the overlap value size or coil thickness determined by calculation or simulation. The overlap value size or the coil thickness determined by the simulation adjusts the second overlap value N2 of the second transformer T2 or the coil thickness of the second secondary winding 144, thereby adjusting the target leakage inductance difference corresponding to the output, and the target voltage difference corresponding to the target leakage inductance difference, so that the overlap difference between the first transformer T1 and the second transformer T2 when the configuration is completed is the target overlap difference corresponding to the target leakage inductance difference, and / or the thickness difference between the coil thickness of the first secondary winding 143 and the coil thickness of the second secondary winding 144 is the target thickness difference corresponding to the target leakage inductance difference.

[0188] In another alternative embodiment, if Fig. 9 As shown, the high voltage generator 100 includes a magnetic core 141, a first primary winding 142, a first secondary winding 143 and a second secondary winding 144, the magnetic core 141, the first primary winding 142 and the first secondary winding 143 constitute a first transformer T1, and the magnetic core 141, the first primary winding 142 and the second secondary winding 144 constitute a second transformer T2;

[0189] The first primary winding 142 is wound on the magnetic column of the magnetic core 141 , the second secondary winding 144 is wound on the first primary winding 142 , and the first secondary winding 143 is wound on the second secondary winding 144 ;

[0190] The overlap difference between the first overlap value N1 and the second overlap value N2 is a target overlap difference corresponding to the target leakage inductance difference, and / or the thickness difference between the coil thickness of the first secondary winding 143 and the coil thickness of the second secondary winding 144 is a target thickness difference corresponding to the target leakage inductance difference, and the target overlap difference and / or the target thickness difference are not zero;

[0191] The first overlap value N1 is the overlap value of the first secondary winding 143 and the first primary winding 142 along the magnetic column direction, and the second overlap value N2 is the overlap value of the second secondary winding 144 and the first primary winding 142 along the magnetic column direction.

[0192] In this embodiment, the coil thickness refers to the radial dimension of the entire winding after winding along the magnetic column direction, and the overlap value refers to the overlap between the dimension of the secondary winding along the magnetic column direction and the dimension of the corresponding primary winding along the magnetic column direction.

[0193] The first secondary winding 143 and the second secondary winding 144 share the same primary winding and the magnetic core 141 . During configuration, the first primary winding 142 , the first secondary winding 143 , and the second secondary winding 144 are wound sequentially.

[0194] The first primary winding 142 , the first secondary winding 143 , and the second secondary winding 144 may each be composed of a group of windings, or may be composed of a plurality of groups of windings connected in series and in parallel.

[0195] The magnetic core 141 may be a U-shaped magnetic core 141 , an E-shaped magnetic core 141 , an RM-shaped magnetic core 141 , a PQ-shaped magnetic core 141 , or the like.

[0196] The first primary winding 142 is wound on the inner circle, and the first secondary winding 143 and the second secondary winding 144 are wound on the outer circle and are spaced apart along the first direction X1.

[0197] Before the need to output different target voltage differences, the adjustment device can calculate or simulate the leakage inductance L1 required to be adjusted for the first transformer T1 and the leakage inductance L2 required to be adjusted for the second transformer T2 based on the different target voltage differences and the circuit model, and determine the overlap value size and / or wire wrap thickness required to be adjusted for each transformer based on the leakage inductance size by calculation or simulation.

[0198] Before the configuration connection, based on the structure of the first transformer T1 and the second transformer T2, in order to achieve the output voltage of the anode 11 and the cathode 12 to reach the target voltage, and the output voltage difference to reach the target voltage difference, so as to meet the voltage balance or different power supply requirements, when adjusting the leakage inductance L1 of the first transformer T1, the first overlap value N1 of the first transformer T1 or the coil thickness of the first secondary winding 143 can be adjusted based on the overlap value size or coil thickness determined by calculation or simulation. Correspondingly, when adjusting the leakage inductance L2 of the second transformer T2, the overlap value N2 of the second transformer T2 can be adjusted based on the overlap value size or coil thickness determined by calculation or simulation. The overlap value size or the coil thickness determined by the simulation adjusts the second overlap value N2 of the second transformer T2 or the coil thickness of the second secondary winding 144, thereby adjusting the target leakage inductance difference corresponding to the output, and the target voltage difference corresponding to the target leakage inductance difference, so that the overlap difference between the first transformer T1 and the second transformer T2 when the configuration is completed is the target overlap difference corresponding to the target leakage inductance difference, and / or the thickness difference between the coil thickness of the first secondary winding 143 and the coil thickness of the second secondary winding 144 is the target thickness difference corresponding to the target leakage inductance difference.

[0199] In another alternative embodiment, if Fig.10 As shown, the high voltage generator 100 includes a magnetic core 141, a first primary winding 142, a second primary winding 145, a first secondary winding 143 and a second secondary winding 144. The magnetic core 141, the first primary winding 142 and the first secondary winding 143 constitute a first transformer T1, and the magnetic core 141, the second primary winding 145 and the second secondary winding 144 constitute a second transformer T2.

[0200] The first primary winding 142 is wound on the first magnetic column 1411 of the magnetic core 141, the first secondary winding 143 is wound on the first primary winding 142, the second primary winding 145 is wound on the second magnetic column 1412 of the magnetic core 141, the second secondary winding 144 is wound on the second primary winding 145, and the first magnetic column 1411 and the second magnetic column 1412 are arranged opposite to each other;

[0201] The overlap difference between the first overlap value N1 and the second overlap value N2 is a target overlap difference corresponding to the target leakage inductance difference, and / or the thickness difference between the coil thickness of the first secondary winding 143 and the coil thickness of the second secondary winding 144 is a target thickness difference corresponding to the target leakage inductance difference, and the target overlap difference and / or the target thickness difference are not zero;

[0202] The first overlap value N1 is the overlap value of the first secondary winding 143 and the first primary winding 142 along the magnetic column direction, and the second overlap value N2 is the overlap value of the second secondary winding 144 and the second primary winding 145 along the magnetic column direction.

[0203] In this embodiment, the coil thickness refers to the radial dimension of the entire winding after winding along the magnetic column direction, and the overlap value refers to the overlap between the dimension of the secondary winding along the magnetic column direction and the dimension of the corresponding primary winding along the magnetic column direction.

[0204] The first transformer T1 and the second transformer T2 are integrated and share the same magnetic core 141, but use different primary windings, that is, they are wound on different magnetic column positions on the same magnetic core 141. The first primary winding 142 and the second primary winding 145 are respectively connected to the output end of the resonant circuit 120, the first secondary winding 143 is connected to the first voltage doubling rectifier circuit 130, and the second secondary winding 144 is connected to the second voltage doubling rectifier circuit 140. The first primary winding 142 and the first secondary winding 143 are coupled through the magnetic core 141 to transmit the AC power supply of the output circuit of the anode high voltage KV1, and the second primary winding 145 and the second secondary winding 144 are coupled through the magnetic core 141 to transmit the AC power supply of the output circuit of the cathode high voltage KV2.

[0205] The first primary winding 142 , the second primary winding 145 , the first secondary winding 143 and the second secondary winding 144 may each be composed of one group of windings, or may be composed of a plurality of groups of windings connected in series and in parallel.

[0206] The magnetic core 141 may be a U-shaped magnetic core 141 , an E-shaped magnetic core 141 , an RM-shaped magnetic core 141 , a PQ-shaped magnetic core 141 , or the like.

[0207] Before the need to output different target voltage differences, the adjustment device can calculate or simulate the leakage inductance L1 required to be adjusted for the first transformer T1 and the leakage inductance L2 required to be adjusted for the second transformer T2 based on the different target voltage differences and the circuit model, and determine the overlap value size and / or wire wrap thickness required to be adjusted for each transformer based on the leakage inductance size by calculation or simulation.

[0208] When configuring the connection, the first primary winding 142 and the second primary winding 145 are wound on the inner circle. Based on the structure of the first transformer T1 and the second transformer T2, in order to achieve the output voltage of the anode 11 and the cathode 12 to reach the target voltage, and the output voltage difference to reach the target voltage difference, so as to meet the voltage balance or different power supply requirements, when adjusting the leakage inductance L1 of the first transformer T1, the first overlap value N1 of the first transformer T1 or the coil thickness of the first secondary winding 143 can be adjusted based on the overlap value size or coil thickness determined by calculation or simulation. Correspondingly, when adjusting the leakage inductance L2 of the second transformer T2, the second overlap value N2 of the second transformer T2 or the coil thickness of the second secondary winding 144 can be adjusted based on the overlap value size or coil thickness determined by calculation or simulation, so as to adjust the target leakage inductance difference corresponding to the output, and the target voltage difference corresponding to the target leakage inductance difference.

[0209] Based on this, when the target voltage difference needs to be output, the leakage inductance L1 of the first transformer T1 and the leakage inductance L2 of the second transformer T2 can be determined by calculation or simulation based on the target voltage difference and the circuit model, and the overlap value and / or coil thickness of the two transformers can be adjusted accordingly.

[0210] Among them, when configuring the connection, the overlap value and the wire package thickness can be adjusted at the same time, or one of the parameters can be fixed and the other can be adjusted. The specific conditions and methods are not limited.

[0211] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A method for load balancing of an X-ray tube, characterized in that: The load balancing method comprises: A high voltage generator (100) is configured to connect a cathode (12) and an anode (11) of an X-ray tube (10), and to provide a cathode high voltage to the cathode (12) of the X-ray tube (10) and an anode high voltage to the anode (11) of the X-ray tube (10), wherein the voltage polarities of the cathode high voltage and the anode high voltage are opposite, and the high voltage generator (100) comprises a first transformer and a second transformer, wherein the first transformer is arranged in an output circuit of the anode high voltage, and the second transformer is arranged in an output circuit of the cathode high voltage; adjusting the winding of the first transformer and / or the winding of the second transformer based on the target voltage difference to be output, so as to adjust and output a target leakage inductance difference corresponding to the target voltage difference and the target voltage difference, wherein the target leakage inductance difference is not zero; The target voltage difference is the voltage difference between the absolute value voltage of the target anode high voltage of the anode (11) and the absolute value voltage of the target cathode high voltage of the cathode (12), and the target leakage inductance difference is the leakage inductance difference between the target leakage inductance of the first transformer and the target leakage inductance of the second transformer.

2. The load balancing method for an X-ray tube according to claim 1, characterized in that: The step of adjusting the winding of the first transformer and / or the winding of the second transformer based on the target voltage difference to be output to adjust the target leakage inductance difference corresponding to the target voltage difference and the target voltage difference to be output specifically includes: Determine a theoretical leakage inductance difference between the first transformer and the second transformer based on a target voltage difference to be output, wherein the theoretical leakage inductance difference is a leakage inductance difference between a theoretical leakage inductance of the first transformer and a theoretical leakage inductance of the second transformer; Determining adjustment parameters of the windings of the first transformer and / or adjustment parameters of the second transformer based on the theoretical leakage inductance difference; The winding of the first transformer is adjusted based on the adjustment parameters of the first transformer, and / or the winding of the second transformer is adjusted based on the adjustment parameters of the second transformer to adjust the target leakage inductance difference and the target voltage difference to output corresponding to the target voltage difference.

3. The load balancing method for an X-ray tube according to claim 2, characterized in that: The adjustment parameters of the first transformer include at least one parameter of a first overlap value of the primary and secondary windings of the first transformer along the winding magnetic column direction, a coil thickness of the primary winding of the first transformer, and a coil thickness of the secondary winding; The adjustment parameters of the second transformer include at least one parameter of a second overlap value of the primary and secondary windings of the second transformer along the direction of the wound magnetic column, a coil thickness of the primary winding of the second transformer, and a coil thickness of the secondary winding; Among them, the overlap value is the overlap between the size of the secondary winding along the magnetic column direction and the size of the corresponding primary winding along the magnetic column direction, and the coil thickness is the size of the radial direction of the entire winding along the magnetic column direction after winding.

4. The load balancing method for an X-ray tube according to claim 3, characterized in that: The high-voltage generator (100) comprises a magnetic core (141), a first primary winding (142), a first secondary winding (143) and a second secondary winding (144); the magnetic core (141), the first primary winding (142) and the first secondary winding (143) constitute the first transformer; the magnetic core (141), the first primary winding (142) and the second secondary winding (144) constitute the second transformer; The first primary winding (142) is wound on the magnetic column of the magnetic core (141), and the first secondary winding (143) and the second secondary winding (144) are wound side by side and spaced apart on the first primary winding (142) along the direction of the magnetic column; or the first primary winding (142) is wound on the magnetic column of the magnetic core (141), the second secondary winding (144) is wound on the first primary winding (142), and the first secondary winding (143) is wound on the second secondary winding (144); The adjustment parameters of the first transformer include a first overlap value of the first secondary winding (143) and the first primary winding (142) along the magnetic column direction, and / or include a coil thickness of the first secondary winding (143); The adjustment parameters of the second transformer include a second overlap value of the second secondary winding (144) and the first primary winding (142) along the magnetic column direction, and / or include the coil thickness of the second secondary winding (144).

5. The load balancing method for an X-ray tube according to claim 3, characterized in that: The high-voltage generator (100) comprises a magnetic core (141), a first primary winding (142), a second primary winding (145), a first secondary winding (143) and a second secondary winding (144); the magnetic core (141), the first primary winding (142) and the first secondary winding (143) constitute the first transformer; the magnetic core (141), the second primary winding (145) and the second secondary winding (144) constitute the second transformer; The first primary winding (142) is wound on a first magnetic column (1411) of the magnetic core (141), the first secondary winding (143) is wound on the first primary winding (142), the second primary winding (145) is wound on a second magnetic column (1412) of the magnetic core (141), the second secondary winding (144) is wound on the second primary winding (145), and the first magnetic column (1411) and the second magnetic column (1412) are arranged opposite to each other; The adjustment parameters of the first transformer include a first overlap value of the first secondary winding (143) and the first primary winding (142) along the magnetic column direction, and / or include a coil thickness of the first secondary winding (143); The adjustment parameters of the second transformer include a second overlap value of the second secondary winding (144) and the second primary winding (145) along the magnetic column direction, and / or include a coil thickness of the second secondary winding (144).

6. The load balancing method for an X-ray tube according to claim 4 or 5, characterized in that: The step of adjusting the winding of the first transformer based on the adjustment parameter of the first transformer, and / or adjusting the winding of the second transformer based on the adjustment parameter of the second transformer to adjust and output a target leakage inductance difference corresponding to the target voltage difference and the target voltage difference specifically includes: adjusting the first coincidence value based on an adjustment parameter of the first transformer, and / or adjusting the second coincidence value based on an adjustment parameter of the second transformer, so that a coincidence difference between the first coincidence value and the second coincidence value corresponds to the target leakage inductance difference, wherein the coincidence difference is not zero; And / or, adjusting the coil thickness of the first secondary winding (143) based on the adjustment parameters of the first transformer and / or adjusting the coil thickness of the second secondary winding (144) based on the adjustment parameters of the second transformer, so that the thickness difference between the coil thickness of the first secondary winding (143) and the coil thickness of the second secondary winding (144) corresponds to the target leakage inductance difference, so as to adjust the output to correspond to the target leakage inductance difference and the target voltage difference, wherein the thickness difference is not zero.

7. A load-balanced X-ray system, characterized in that: include: An X-ray tube (10), the X-ray tube (10) comprising a cathode (12) and an anode (11); A high voltage generator (100), the high voltage generator (100) being used to connect a cathode (12) and an anode (11) of the X-ray tube (10), and to provide a cathode high voltage to the cathode (12) of the X-ray tube (10) and to provide an anode high voltage to the anode (11) of the X-ray tube (10), wherein the voltage polarities of the cathode high voltage and the anode high voltage are opposite, and the high voltage generator (100) comprises a first transformer and a second transformer, wherein the first transformer is arranged in an output circuit of the anode high voltage, and the second transformer is arranged in an output circuit of the cathode high voltage; The leakage inductance difference between the leakage inductance of the first transformer and the leakage inductance of the second transformer is a target leakage inductance difference corresponding to the target voltage difference, the target voltage difference is the voltage difference between the absolute value voltage of the target anode high voltage of the anode (11) and the absolute value voltage of the target cathode high voltage of the cathode (12), and the target leakage inductance difference is not zero.

8. The load-balanced X-ray system according to claim 7, characterized in that: The load-balanced X-ray system further comprises: An adjusting device is connected to the high voltage generator (100), and the adjusting device is used to implement the steps of the load balancing method for an X-ray tube as claimed in any one of claims 1 to 6.

9. The load-balanced X-ray system according to claim 7 or 8, characterized in that: The high-voltage generator (100) comprises a magnetic core (141), a first primary winding (142), a first secondary winding (143) and a second secondary winding (144); the magnetic core (141), the first primary winding (142) and the first secondary winding (143) constitute the first transformer; the magnetic core (141), the first primary winding (142) and the second secondary winding (144) constitute the second transformer; The first primary winding (142) is wound on the magnetic column of the magnetic core (141), and the first secondary winding (143) and the second secondary winding (144) are wound side by side and spaced apart on the first primary winding (142) along the direction of the magnetic column; Alternatively, the first primary winding (142) is wound on the magnetic column of the magnetic core (141), the second secondary winding (144) is wound on the first primary winding (142), and the first secondary winding (143) is wound on the second secondary winding (144); wherein the overlap difference between the first overlap value and the second overlap value is a target overlap difference corresponding to the target leakage inductance difference, and / or the thickness difference between the coil thickness of the first secondary winding (143) and the coil thickness of the second secondary winding (144) is a target thickness difference corresponding to the target leakage inductance difference, and the target overlap difference and / or the target thickness difference are not zero; The first overlap value is the overlap value of the first secondary winding (143) and the first primary winding (142) along the magnetic column direction, and the second overlap value is the overlap value of the second secondary winding (144) and the first primary winding (142) along the magnetic column direction.

10. The load-balanced X-ray system according to claim 7 or 8, characterized in that: The high-voltage generator (100) comprises a magnetic core (141), a first primary winding (142), a second primary winding (145), a first secondary winding (143) and a second secondary winding (144); the magnetic core (141), the first primary winding (142) and the first secondary winding (143) constitute the first transformer; the magnetic core (141), the second primary winding (145) and the second secondary winding (144) constitute the second transformer; The first primary winding (142) is wound on a first magnetic column (1411) of the magnetic core (141), the first secondary winding (143) is wound on the first primary winding (142), the second primary winding (145) is wound on a second magnetic column (1412) of the magnetic core (141), the second secondary winding (144) is wound on the second primary winding (145), and the first magnetic column (1411) and the second magnetic column (1412) are arranged opposite to each other; wherein the overlap difference between the first overlap value and the second overlap value is a target overlap difference corresponding to the target leakage inductance difference, and / or the thickness difference between the coil thickness of the first secondary winding (143) and the coil thickness of the second secondary winding (144) is a target thickness difference corresponding to the target leakage inductance difference, and the target overlap difference and / or the target thickness difference are not zero; The first overlap value is the overlap value of the first secondary winding (143) and the first primary winding (142) along the magnetic column direction, and the second overlap value is the overlap value of the second secondary winding (144) and the second primary winding (145) along the magnetic column direction.

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