An output circuit with fast voltage switching and a switching method thereof

Abstract

This application relates to a voltage-fast switching output circuit and its switching method, belonging to the technical field of high-voltage generators. The circuit includes: N rectifier modules, where N is a positive integer greater than or equal to two; half-bridge modules, each corresponding to a rectifier module; and N-1 switching modules between adjacent rectifier modules. The first terminal of the m-th switching module is connected to the positive output terminal of the m-th rectifier module, and the second terminal is connected to the positive output terminal of the (m+1)-th rectifier module. The negative output terminal of the m-th rectifier module is connected to the output terminal of the corresponding half-bridge module of the (m+1)-th rectifier module, where m is a positive integer. The output terminal of the half-bridge module corresponding to the first rectifier module is connected to the first output terminal of the output circuit, and the negative output terminal of the N-th rectifier module is connected to the second output terminal of the output circuit. This application can quickly achieve voltage switching.

Description

Technical Field

[0001] This application relates to the technical field of high voltage generators, and in particular to an output circuit and switching method for rapid voltage switching. Background Technology

[0002] The CT tube is an important component of CT equipment, used to generate X-rays. Its working process is as follows: under a high voltage and strong electric field, an active free electron beam is driven to strike the anode molybdenum-based tungsten target at high speed by the cathode, and energy conversion occurs, so that one percent of the electrical energy is formed into X-rays.

[0003] As attached Figure 1 As shown, currently, the high-voltage generator used to power the CT tube 5 mostly adopts the LCC topology, which connects multiple rectifier units directly in series with the secondary side of the transformer 3 to obtain a high-voltage output. The power supply voltage of the CT tube 5 is adjusted by controlling the input voltage of the primary side of the transformer 3.

[0004] Regarding the aforementioned related technologies, the inventors discovered that because the capacitor in the rectifier unit prevents the output voltage of the rectifier unit from changing abruptly when controlling the input voltage on the primary side of the transformer, the capacitor needs time to charge or discharge when switching the output voltage of the high voltage generator. Therefore, it is not conducive to the high voltage generator achieving rapid switching of the output voltage. Summary of the Invention

[0005] In order to improve the switching speed of the output voltage of a high-voltage generator, this application provides an output circuit and switching method for fast output voltage switching.

[0006] In the first aspect, this application provides an output circuit for fast voltage switching, which adopts the following technical solution.

[0007] A voltage-fast switching output circuit includes:

[0008] A rectifier module, wherein there are N rectifier modules, where N is a positive integer greater than or equal to two;

[0009] A half-bridge module is provided, which is configured in a one-to-one correspondence with the rectifier module. The positive input terminal of the half-bridge module is connected to the positive output terminal of the rectifier module, and the negative input terminal of the half-bridge module is connected to the negative output terminal of the rectifier module. The half-bridge module is used to switch the output voltage of the output circuit.

[0010] A switch module is provided between adjacent rectifier modules. There are N-1 switch modules. The first end of the m-th switch module is connected to the positive output terminal of the m-th rectifier module, and the second end of the switch module is connected to the positive output terminal of the (m+1)-th rectifier module.

[0011] The negative terminal of the output of the m-th rectifier module is connected to the output of the half-bridge module corresponding to the (m+1)-th rectifier module, where m is a positive integer;

[0012] The output terminal of the half-bridge module corresponding to the first rectifier module is connected to the first output terminal of the output circuit, and the negative terminal of the output terminal of the Nth rectifier module is connected to the second output terminal of the output circuit.

[0013] By adopting the above technical solution, the rectifier modules are not directly connected in series. After AC power is applied to the input terminal of the rectifier module, DC power is output from the output terminal. By controlling the opening of the upper or lower bridge arm in multiple half-bridge modules, the series or parallel connection of multiple rectifier modules can be controlled. When it is necessary to switch the output voltage, it is only necessary to increase or decrease the number of rectifier modules connected in series. Since this application does not change the voltage of the rectifier unit, there is no need to wait for the capacitor to charge or discharge. By increasing or decreasing the number of rectifier modules connected in series through the half-bridge modules, voltage switching can be quickly achieved.

[0014] Optionally, there are two rectifier modules, with the first terminal of the switch module connected to the positive output terminal of the first rectifier module, and the second terminal of the switch module connected to the positive output terminal of the second rectifier module.

[0015] The negative terminal of the first rectifier module is connected to the output terminal of the corresponding half-bridge module of the second rectifier module;

[0016] The output terminal of the half-bridge module corresponding to the first rectifier module is connected to the first output terminal of the output circuit, and the negative terminal of the output terminal of the second rectifier module is connected to the second output terminal of the output circuit.

[0017] By adopting the above technical solution, when the two rectifier modules are connected in parallel, the output voltage of the output circuit is equal to the output voltage of a single rectifier module; when they are connected in series, the output voltage of the output circuit is equal to the output voltage of a double rectifier module; and when they are short-circuited, the output voltage of the output circuit is zero, and it can switch quickly.

[0018] Optionally, the switching module includes a first diode D1, the anode of the first diode D1 being connected to a second terminal of the switching module, and the cathode of the first diode D1 being connected to a first terminal of the switching module.

[0019] By adopting the above technical solution, the unidirectional conductivity of the diode automatically switches the switching module between on and off states.

[0020] Secondly, this application provides another output circuit with fast voltage switching, which adopts the following technical solution.

[0021] A voltage-fast switching output circuit includes:

[0022] A rectifier module, wherein there are N rectifier modules, where N is a positive integer greater than or equal to two;

[0023] A half-bridge module is provided, which is configured in a one-to-one correspondence with the rectifier module. The positive input terminal of the half-bridge module is connected to the positive output terminal of the rectifier module, and the negative input terminal of the half-bridge module is connected to the negative output terminal of the rectifier module. The half-bridge module is used to switch the output voltage of the output circuit.

[0024] A switch module is provided between adjacent rectifier modules. There are N-1 switch modules. The first terminal of the m-th switch module is connected to the negative output terminal of the m-th rectifier module, and the second terminal of the switch module is connected to the negative output terminal of the (m+1)-th rectifier module.

[0025] The output terminal of the m-th rectifier module corresponding to the half-bridge module is connected to the positive terminal of the (m+1)-th rectifier module, where m is a positive integer;

[0026] The positive terminal of the first rectifier module is connected to the first output terminal of the output circuit, and the output terminal of the half-bridge module corresponding to the Nth rectifier module is connected to the second output terminal of the output circuit.

[0027] Optionally, there are two rectifier modules, with the first terminal of the switch module connected to the negative output terminal of the first rectifier module, and the second terminal of the switch module connected to the negative output terminal of the second rectifier module.

[0028] The negative terminal of the first rectifier module is connected to the output terminal of the corresponding half-bridge module of the second rectifier module;

[0029] The output terminal of the half-bridge module corresponding to the first rectifier module is connected to the first output terminal of the output circuit, and the negative terminal of the output terminal of the second rectifier module is connected to the second output terminal of the output circuit.

[0030] Optionally, the switching module includes a first diode D1, the anode of the first diode D1 being connected to a second terminal of the switching module, and the cathode of the first diode D1 being connected to a first terminal of the switching module.

[0031] Thirdly, this application provides a method for rapid voltage switching, which adopts the following technical solution.

[0032] A method for rapid voltage switching, applied to the output circuit described in the first aspect above, includes:

[0033] In response to the series signal, the upper arms of the two half-bridge modules are turned on, the two rectifier modules are connected in series, and the output voltage of the output circuit is equal to the sum of the output voltages of the two rectifier modules.

[0034] or,

[0035] In response to the parallel signal, the upper arm of the first rectifier module corresponding to the half-bridge module is turned on, and the lower arm of the second rectifier module corresponding to the half-bridge module is turned on. The two rectifier modules are connected in parallel, and the output voltage of the output circuit is equal to the output voltage of the rectifier module.

[0036] or,

[0037] In response to the short-circuit signal, the lower arms of the two half-bridge modules are turned on, and the output voltage of the output circuit is equal to zero.

[0038] Fourthly, this application provides another method for rapid voltage switching, which adopts the following technical solution.

[0039] A method for rapid voltage switching, applied to the output circuit described in the second aspect above, includes:

[0040] In response to the series signal, the lower bridge arm of the two half-bridge modules is turned on, the two rectifier modules are connected in series, and the output voltage of the output circuit is equal to the sum of the output voltages of the two rectifier modules.

[0041] or,

[0042] In response to the parallel signal, the upper arm of the first rectifier module corresponding to the half-bridge module is turned on, and the lower arm of the second rectifier module corresponding to the half-bridge module is turned on. The two rectifier modules are connected in parallel, and the output voltage of the output circuit is equal to the output voltage of the rectifier module.

[0043] or,

[0044] In response to the short-circuit signal, the upper arms of the two half-bridge modules are turned on, and the output voltage of the output circuit is equal to zero.

[0045] Fifthly, this application provides a high-voltage switching module, which adopts the following technical solution.

[0046] A high-voltage switching module includes an output circuit as described in the first aspect or the second aspect above. The output circuit has one output circuit, a first input terminal of which is connected to a first input terminal of the high-voltage switching module, and a second input terminal of which is connected to a first input terminal of the high-voltage switching module. The first output terminal and the second output terminal of the high-voltage switching module are respectively connected to the two ends of the output circuit in a one-to-one correspondence.

[0047] or,

[0048] There are at least two output circuits. The two ends of the input terminals of all the output circuits connected in series or in parallel are connected to the first and second input terminals of the high-voltage switching module respectively. The output terminals of all the output circuits are connected in series. The first and second output terminals of the high-voltage switching module are respectively connected to the two ends of the series connection of all the output circuits.

[0049] By adopting the above technical solution, the high-voltage switching module has one output circuit or at least two output circuits, thereby enabling the output voltage of the high-voltage switching module to switch rapidly between 0 to 2 integer multiples or 0 to any integer multiple of the rectifier module output voltage.

[0050] Sixthly, this application provides a high-voltage generator, which adopts the following technical solution.

[0051] A high-voltage generator, comprising:

[0052] An inverter, wherein the input terminal of the inverter is connected to a DC power supply, and the output terminal of the inverter outputs a first AC power;

[0053] A transformer, wherein the primary side of the transformer is connected to the output terminal of the inverter for receiving the first AC power, and the secondary side of the transformer is used to output the second AC power;

[0054] The high-voltage switching module of the fifth aspect mentioned above, wherein the first input terminal of the high-voltage switching module is connected to one end of the secondary side of the transformer, and the second input terminal of the high-voltage switching module is connected to the other end of the secondary side of the transformer;

[0055] The high-voltage switching module is used to output high-voltage direct current with adjustable amplitude between its first and second output terminals.

[0056] In summary, this application includes at least the following beneficial effects:

[0057] 1. By setting up half-bridge modules and switching modules, the rectifier modules are not directly connected in series. After AC power is applied to the input terminal of the rectifier module, DC power is output from the output terminal. By controlling the opening of the upper or lower bridge arm of multiple half-bridge modules, the series or parallel connection of multiple rectifier modules can be controlled. When it is necessary to switch the output voltage, it is only necessary to increase or decrease the number of rectifier modules connected in series. Since this application does not change the voltage of the rectifier unit, there is no need to wait for the capacitor to charge or discharge. By increasing or decreasing the number of rectifier modules connected in series through half-bridge modules, voltage switching can be quickly achieved. Attached Figure Description

[0058] Figure 1 This is a schematic diagram of the circuit structure of the related technology;

[0059] Figure 2This is a schematic diagram of the circuit topology of one embodiment of the voltage fast switching output circuit of this application;

[0060] Figure 3 This is a circuit structure diagram of a preferred embodiment of the voltage fast switching output circuit in one embodiment of this application;

[0061] Figure 4 This is a schematic diagram of the on / off state of the corresponding half-bridge module when two rectifier modules are connected in series in one embodiment of this application;

[0062] Figure 5 This is a schematic diagram of the on / off state of the corresponding half-bridge module when two rectifier modules are connected in parallel in one embodiment of this application;

[0063] Figure 6 This is a schematic diagram of the on / off state of the corresponding half-bridge module when the two rectifier modules are short-circuited in one embodiment of this application;

[0064] Figure 7 The voltage fast switching output circuit of this application differs from... Figure 2 A schematic diagram of the circuit topology of another implementation method;

[0065] Figure 8 This is a circuit structure diagram of a preferred embodiment of the voltage fast switching output circuit in another embodiment of this application;

[0066] Figure 9 This is a schematic diagram of the on / off state of the corresponding half-bridge module when two rectifier modules are connected in series in another embodiment of this application;

[0067] Figure 10 This is a schematic diagram of the on / off state of the corresponding half-bridge module when two rectifier modules are connected in parallel in another embodiment of this application;

[0068] Figure 11 This is a schematic diagram of the on / off state of the corresponding half-bridge module when the two rectifier modules are short-circuited in another embodiment of this application;

[0069] Figure 12 This is a circuit structure diagram of one embodiment of the high-voltage switching module of this application;

[0070] Figure 13 This is a circuit structure diagram of another embodiment of the high-voltage switching module of this application;

[0071] Figure 14 This is a circuit diagram of one embodiment of the high-voltage generator of this application.

[0072] Explanation of reference numerals in the attached diagram: 1. DC power supply; 2. Inverter; 3. Transformer; 4. High-voltage switching module; 41. Output circuit; 411. Rectifier module; 4111. First rectifier module; 4112. Second rectifier module; 412. Half-bridge module; 413. Switching module; 5. CT tube. Detailed Implementation

[0073] To make the objectives, technical solutions, and advantages of this invention clearer, the following description is provided in conjunction with the appendix. Figure 1-14 The present invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0074] This application provides an output circuit for fast voltage switching.

[0075] Example 1, as shown in the appendix Figure 2 As shown, a voltage-fast switching output circuit includes:

[0076] A rectifier module 411 is provided, comprising N modules, where N is a positive integer greater than or equal to two. In this embodiment, the rectifier module 411 employs a bridge rectifier, which includes a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, and a capacitor C. The anode of the second diode D2 is connected to the cathode of the third diode D3 and is also connected to the first input terminal of the rectifier module 411. The anode of the fourth diode D4 is connected to the cathode of the fifth diode D5 and is also connected to the second input terminal of the rectifier module 411. The cathode of the second diode D2 is connected to the cathode of the fourth diode D4. The electrodes are connected as follows: the anode of the third diode D3 is connected to the anode of the fifth diode D5; one end of the capacitor C is connected to the cathode of the fourth diode D4; and the other end of the capacitor C is connected to the anode of the fifth diode D5. The two ends of the capacitor C are the output terminals of the rectifier module 411. The end connected to the cathodes of the second diode D2 and the fourth diode D4 is the positive output terminal of the rectifier module 411, and the end connected to the anodes of the fourth diode D4 and the fifth diode D5 is the negative output terminal of the rectifier module 411. In other embodiments, the rectifier module 411 may also employ half-wave rectification. In this embodiment, the half-bridge module 412 includes a first switch S1 and a second switch S2. One end of the first switch S1 is connected to the positive input terminal of the half-bridge module 412, and the other end of the first switch S1 is connected to one end of the second switch S2. The other end of the second switch S2 is connected to the negative input terminal of the half-bridge module 412, and the connection point of the first switch S1 and the second switch S2 is connected to the output terminal of the half-bridge module 412. The first switch S1 and the second switch S2 can be switching devices such as knife switches, push-button switches, relays, thyristors, MOSFETs, or transistors. The half-bridge module 412 and the rectifier module 411 are configured in a one-to-one correspondence. The positive input terminal of the half-bridge module 412 is connected to the positive output terminal of the rectifier module 411, and the negative input terminal of the half-bridge module 412 is connected to the negative output terminal of the rectifier module 411. The half-bridge module 412 is used to switch the output voltage of the output circuit 41.

[0077] It should be noted that the upper bridge arm of the half-bridge module 412 is connected to the positive terminal of the rectifier module 411 output, and the lower bridge arm of the half-bridge module 412 is connected to the negative terminal of the rectifier module 411 output. The upper and lower bridge arms of the same half-bridge module 412 cannot be turned on at the same time.

[0078] A switch module 413 is provided between adjacent rectifier modules 411. There are N-1 switch modules 413. The first end of the m-th switch module 413 is connected to the positive output terminal of the m-th rectifier module 411, and the second end of the switch module 413 is connected to the positive output terminal of the (m+1)-th rectifier module 411.

[0079] The negative terminal of the output of the m-th rectifier module 411 is connected to the output of the corresponding half-bridge module 412 of the (m+1)-th rectifier module 411, where m is a positive integer;

[0080] The output terminal of the half-bridge module 412 corresponding to the first rectifier module 411 is connected to the first output terminal of the output circuit 41, and the negative terminal of the output terminal of the Nth rectifier module 411 is connected to the second output terminal of the output circuit 41.

[0081] It should be noted that the N rectifier modules 411 have 2N input terminals. In this application, the input terminals of the N rectifier modules 411 are connected in series / parallel and then used as the two input terminals of the output circuit 41. In this embodiment, the rectifier modules 411 are not directly connected in series. After AC power is applied to the input terminals of the rectifier modules 411, DC power is output from the output terminals of the rectifier modules 411. By controlling the upper or lower bridge arm of the multiple half-bridge modules 412 to open, the series or parallel connection of the multiple rectifier modules 411 can be controlled. When it is necessary to switch the output voltage, it is only necessary to increase or decrease the number of rectifier modules 411 connected in series. Since this application does not change the voltage of the rectifier unit, there is no need to wait for the capacitor to charge or discharge. By increasing or decreasing the number of rectifier modules 411 connected in series through the half-bridge modules 412, the voltage switching can be quickly achieved.

[0082] As attached Figure 3 As shown, as one implementation of the output circuit, there are two rectifier modules 411, namely a first rectifier module 4111 and a second rectifier module 4112. The first terminal of the switch module 413 is connected to the positive terminal of the output of the first rectifier module 4111, and the second terminal of the switch module 413 is connected to the positive terminal of the output of the second rectifier module 4112. The negative terminal of the output of the first rectifier module 4111 is connected to the output of the corresponding half-bridge module 412 of the second rectifier module 4112. The output of the half-bridge module 412 corresponding to the first rectifier module 4111 is connected to the first output terminal of the output circuit 41, and the negative terminal of the output of the second rectifier module 4112 is connected to the second output terminal of the output circuit 41.

[0083] In this embodiment, when the two rectifier modules 411 are connected in parallel, the output voltage of the output circuit 41 is equal to the output voltage of a single rectifier module 411; when they are connected in series, the output voltage of the output circuit 41 is equal to the output voltage of a double rectifier module 411; and when they are short-circuited, the output voltage of the output circuit 41 is zero, and it can switch quickly.

[0084] It should be noted that this embodiment is only a preferred embodiment of this application. In other embodiments, the output circuit 41 may include 3, 4 or 5 rectifier modules 411.

[0085] As one implementation of the switching module, the switching module 413 includes a first diode D1, the anode of the first diode D1 is connected to the second terminal of the switching module 413, and the cathode of the first diode D1 is connected to the first terminal of the switching module 413.

[0086] In this embodiment, the unidirectional conductivity of the diode automatically switches the on and off states of the switching module 413. When connected in series, since the positive terminal of the output of the second rectifier module 4112 is connected to the negative terminal of the output of the first rectifier module 4111, the voltage at the positive terminal of the output of the first rectifier module 4111 is greater than the voltage at the positive terminal of the output of the second rectifier module 4112, and the first diode D1 is automatically turned off. When connected in parallel, the negative terminal of the output of the second rectifier module 4112 is connected to the negative terminal of the output of the first rectifier module 4111. Under the action of the load, the voltage at the positive terminal of the output of the first rectifier module 4111 is slightly less than the voltage at the positive terminal of the output of the second rectifier module 4112, and the first diode D1 is automatically turned on.

[0087] In other embodiments, the switching module 413 may also be a switching device such as a thyristor, MOSFET, or transistor.

[0088] This application provides a method for fast voltage switching, used to switch the output voltage of the output circuit in the above embodiment 1.

[0089] A method for rapid voltage switching includes:

[0090] As attached Figure 4 As shown, in response to the series signal, the upper arms of the two half-bridge modules 412 are turned on, the two rectifier modules 411 are connected in series, and the output voltage of the output circuit 41 is equal to the sum of the output voltages of the two rectifier modules 411.

[0091] Specifically, after the upper bridge arm of the two half-bridge modules 412, the positive output terminal of the second rectifier module 4112 is connected to the negative output terminal of the first rectifier module 4111 through the corresponding half-bridge module 412, so that the potential of the negative output terminal of the first rectifier module 4111 is equal to the potential of the positive output terminal of the second rectifier module 4112, thereby raising the potential of the positive output terminal of the first rectifier module 4111. The positive output terminal of the first rectifier module 4111 is connected to the output terminal of the output circuit 41 through the corresponding half-bridge module 412, so that the output voltage of the output circuit 41 is twice the output voltage of the rectifier module 411.

[0092] or,

[0093] As attached Figure 5As shown, in response to the parallel signal, the upper arm of the first rectifier module 4111 corresponding to the half-bridge module 412 is turned on, and the lower arm of the second rectifier module 4112 corresponding to the half-bridge module 412 is turned on. The two rectifier modules 411 are connected in parallel, and the output voltage of the output circuit 41 is equal to the output voltage of the rectifier module 411.

[0094] Specifically, the negative output terminal of the second rectifier module 4112 is connected to the negative output terminal of the first rectifier module 4111 through the corresponding half-bridge module 412, and the positive output terminal of the second rectifier module 4112 is connected to the positive output terminal of the first rectifier module 4111 through the first diode D1. The two rectifier modules 411 are connected in parallel, so that the output voltage of the output circuit 41 is one times that of the output voltage of the rectifier module 411.

[0095] or,

[0096] As attached Figure 6 As shown, in response to the short-circuit signal, the lower bridge arm of the two half-bridge modules 412 is turned on, and the output voltage of the output circuit 41 is equal to zero.

[0097] Specifically, when the lower bridge arm of the two half-bridge module 412 is turned on, the two output terminals of the output circuit 41 are short-circuited, and the output voltage is zero.

[0098] It should be noted that series signals, parallel signals, and short-circuit signals can be issued manually or by the controller. For example, when the half-bridge module 412 is composed of knife switches, the state of the half-bridge module 412 is decided and controlled manually. When the half-bridge module 412 is composed of controllable switching elements, the controller decides what signal to output to control the on / off state of the switching elements, thereby controlling the state of the half-bridge module 412.

[0099] This application provides another output circuit for fast voltage switching.

[0100] Example 2, as shown in the appendix Figure 7 As shown, a voltage-fast switching output circuit includes: a rectifier module 411, of which there are N rectifier modules 411, where N is a positive integer greater than or equal to two; and a half-bridge module 412, which is configured in a one-to-one correspondence with the rectifier modules 411, wherein the positive input terminal of the half-bridge module 412 is connected to the positive output terminal of the rectifier module 411, and the negative input terminal of the half-bridge module 412 is connected to the negative output terminal of the rectifier module 411; the half-bridge module 412 is used to switch the output voltage of the output circuit 41.

[0101] The difference from the above-described embodiment one is:

[0102] A switch module 413 is provided between adjacent rectifier modules 411. There are N-1 switch modules 413. The first end of the m-th switch module 413 is connected to the negative output terminal of the m-th rectifier module 411, and the second end of the switch module 413 is connected to the negative output terminal of the (m+1)-th rectifier module 411.

[0103] The output terminal of the half-bridge module 412 corresponding to the m-th rectifier module 411 is connected to the positive terminal of the output terminal of the (m+1)-th rectifier module 411, where m is a positive integer;

[0104] The positive terminal of the first rectifier module 411 is connected to the first output terminal of the output circuit 41, and the output terminal of the half-bridge module 412 corresponding to the Nth rectifier module 411 is connected to the second output terminal of the output circuit 41.

[0105] As attached Figure 8 As shown, as one implementation of the output circuit, there are two rectifier modules 411. The first end of the switch module 413 is connected to the negative output terminal of the first rectifier module 411, and the second end of the switch module 413 is connected to the negative output terminal of the second rectifier module 411.

[0106] The negative terminal of the output of the first rectifier module 411 is connected to the output of the corresponding half-bridge module 412 of the second rectifier module 411;

[0107] The output terminal of the half-bridge module 412 corresponding to the first rectifier module 411 is connected to the first output terminal of the output circuit 41, and the negative terminal of the output terminal of the second rectifier module 411 is connected to the second output terminal of the output circuit 41.

[0108] As one implementation of the switching module, the switching module 413 includes a diode D, the anode of the diode D is connected to the second terminal of the switching module 413, and the cathode of the diode D is connected to the first terminal of the switching module 413.

[0109] This application provides a method for rapid voltage switching, used to switch the output voltage of the output circuit in the above embodiment 2.

[0110] A method for rapid voltage switching includes:

[0111] As attached Figure 9 As shown, in response to the series signal, the lower bridge arm of the two half-bridge modules 412 is turned on, the two rectifier modules 411 are connected in series, and the output voltage of the output circuit 41 is equal to the sum of the output voltages of the two rectifier modules 411.

[0112] or,

[0113] As attached Figure 10As shown, in response to the parallel signal, the upper arm of the first rectifier module 411 corresponding to the half-bridge module 412 is turned on, and the lower arm of the second rectifier module 411 corresponding to the half-bridge module 412 is turned on. The two rectifier modules 411 are connected in parallel, and the output voltage of the output circuit 41 is equal to the output voltage of the rectifier module 411.

[0114] or,

[0115] As attached Figure 11 As shown, in response to the short-circuit signal, the upper bridge arm of the two half-bridge modules 412 is turned on, and the output voltage of the output circuit 41 is equal to zero.

[0116] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0117] This application provides a high-voltage switching module.

[0118] As attached Figure 12 As shown, a high-voltage switching module includes the aforementioned output circuit 41. The output circuit 41 has one output circuit. Its first input terminal is connected to the first input terminal of the high-voltage switching module 4, and its second input terminal is also connected to the first input terminal of the high-voltage switching module 4. The first and second output terminals of the high-voltage switching module 4 are respectively connected to the two ends of the output circuit 41.

[0119] or,

[0120] There are at least two output circuits 41. The first input terminal of each output circuit 41 is connected to the first input terminal of the high voltage switching module 4, and the second input terminal of each output circuit 41 is connected to the second input terminal of the high voltage switching module 4. The output terminals of all output circuits 41 are connected in series, and the first and second output terminals of the high voltage switching module 4 are respectively connected to the two ends of the series connection of all output circuits 41.

[0121] Additionally, as attached Figure 13 As shown, when there are at least two output circuits 41, the two ends of the series connection of the input terminals of all output circuits 41 can be connected to the first and second input terminals of the high voltage switching module 4.

[0122] In this embodiment, when the high-voltage switching module 4 has one output circuit 41, the output voltage of the high-voltage switching module 4 switches rapidly between 0 and 2 integer multiples of the output voltage of the rectifier module 411; when the high-voltage switching module 4 has two or more output circuits 41, such as three, the output voltage of the high-voltage switching module 4 switches rapidly between 0 and 6 integer multiples of the output voltage of the rectifier module 411.

[0123] This application provides a high-voltage generator, which adopts the following technical solution.

[0124] As attached Figure 14 As shown, a high-voltage generator includes:

[0125] Inverter 2 has a DC power supply 1 connected to its input terminal and outputs a first AC power.

[0126] Transformer 3, the primary side of transformer 3 is connected to the output terminal of inverter 2 to receive the first AC power, and the secondary side of transformer 3 is used to output the second AC power;

[0127] The high-voltage switching module 4 is described above. Its first input terminal is connected to one end of the secondary side of transformer 3, and its second input terminal is connected to the other end of the secondary side of transformer 3.

[0128] The high voltage switching module 4 is used to output high voltage DC power with adjustable amplitude between its first and second output terminals.

[0129] It should be noted that, for the sake of convenience and brevity, the above division of functional units and modules is used as an example. In actual applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the system can be divided into different functional units or modules to complete all or part of the functions described above.

[0130] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A voltage-fast switching output circuit, characterized in that, include: A rectifier module (411) is provided, wherein there are N rectifier modules (411), where N is a positive integer greater than or equal to two. A half-bridge module (412) is provided, which corresponds one-to-one with the rectifier module (411). The positive input terminal of the half-bridge module (412) is connected to the positive output terminal of the rectifier module (411), and the negative input terminal of the half-bridge module (412) is connected to the negative output terminal of the rectifier module (411). The half-bridge module (412) is used to switch the output voltage of the output circuit (41). A switch module (413) is provided between adjacent rectifier modules (411). There are N-1 switch modules (413). The first end of the m-th switch module (413) is connected to the positive output terminal of the m-th rectifier module (411), and the second end of the switch module (413) is connected to the positive output terminal of the (m+1)-th rectifier module (411). The negative terminal of the output of the m-th rectifier module (411) is connected to the output of the half-bridge module (412) corresponding to the (m+1)-th rectifier module (411), where m is a positive integer; The output terminal of the half-bridge module (412) corresponding to the first rectifier module (411) is connected to the first output terminal of the output circuit (41), and the negative terminal of the output terminal of the Nth rectifier module (411) is connected to the second output terminal of the output circuit (41).

2. The voltage fast switching output circuit according to claim 1, characterized in that: There are two rectifier modules (411). The first end of the switch module (413) is connected to the positive output terminal of the first rectifier module (411), and the second end of the switch module (413) is connected to the positive output terminal of the second rectifier module (411). The negative terminal of the output of the first rectifier module (411) is connected to the output terminal of the corresponding half-bridge module (412) of the second rectifier module (411); The output terminal of the half-bridge module (412) corresponding to the first rectifier module (411) is connected to the first output terminal of the output circuit (41), and the negative terminal of the output terminal of the second rectifier module (411) is connected to the second output terminal of the output circuit (41).

3. The voltage fast switching output circuit according to claim 2, characterized in that: The switching module (413) includes a first diode D1, the anode of the first diode D1 is connected to the second end of the switching module (413), and the cathode of the first diode D1 is connected to the first end of the switching module (413).

4. A voltage-fast switching output circuit, characterized in that, include: A rectifier module (411) is provided, wherein there are N rectifier modules (411), where N is a positive integer greater than or equal to two. A half-bridge module (412) is provided, which corresponds one-to-one with the rectifier module (411). The positive input terminal of the half-bridge module (412) is connected to the positive output terminal of the rectifier module (411), and the negative input terminal of the half-bridge module (412) is connected to the negative output terminal of the rectifier module (411). The half-bridge module (412) is used to switch the output voltage of the output circuit (41). A switch module (413) is provided between adjacent rectifier modules (411). There are N-1 switch modules (413). The first end of the m-th switch module (413) is connected to the negative output terminal of the m-th rectifier module (411), and the second end of the switch module (413) is connected to the negative output terminal of the (m+1)-th rectifier module (411). The output terminal of the m-th rectifier module (411) corresponding to the half-bridge module (412) is connected to the positive terminal of the (m+1)-th rectifier module (411), where m is a positive integer; The positive output terminal of the first rectifier module (411) is connected to the first output terminal of the output circuit (41), and the output terminal of the half-bridge module (412) corresponding to the Nth rectifier module (411) is connected to the second output terminal of the output circuit (41).

5. The voltage fast switching output circuit according to claim 4, characterized in that: There are two rectifier modules (411). The first end of the switch module (413) is connected to the negative output terminal of the first rectifier module (411), and the second end of the switch module (413) is connected to the negative output terminal of the second rectifier module (411). The negative terminal of the output of the first rectifier module (411) is connected to the output terminal of the corresponding half-bridge module (412) of the second rectifier module (411); The output terminal of the half-bridge module (412) corresponding to the first rectifier module (411) is connected to the first output terminal of the output circuit (41), and the negative terminal of the output terminal of the second rectifier module (411) is connected to the second output terminal of the output circuit (41).

6. The voltage fast switching output circuit according to claim 5, characterized in that: The switching module (413) includes a first diode D1, the anode of the first diode D1 is connected to the second end of the switching module (413), and the cathode of the first diode D1 is connected to the first end of the switching module (413).

7. A method for rapid voltage switching, applied to the output circuit as described in claim 3, characterized in that: In response to the series signal, the upper arms of the two half-bridge modules (412) are turned on, the two rectifier modules (411) are connected in series, and the output voltage of the output circuit (41) is equal to the sum of the output voltages of the two rectifier modules (411). or, In response to the parallel signal, the upper arm of the first rectifier module (411) corresponding to the half-bridge module (412) is turned on, and the lower arm of the second rectifier module (411) corresponding to the half-bridge module (412) is turned on. The two rectifier modules (411) are connected in parallel, and the output voltage of the output circuit (41) is equal to the output voltage of the rectifier module (411). or, In response to the short-circuit signal, the lower bridge arms of the two half-bridge modules (412) are turned on, and the output voltage of the output circuit is equal to zero.

8. A method for rapid voltage switching, applied to the output circuit (41) as described in claim 6, characterized in that: In response to the series signal, the lower bridge arm of the two half-bridge modules (412) is turned on, the two rectifier modules (411) are connected in series, and the output voltage of the output circuit (41) is equal to the sum of the output voltages of the two rectifier modules (411). or, In response to the parallel signal, the upper arm of the first rectifier module (411) corresponding to the half-bridge module (412) is turned on, and the lower arm of the second rectifier module (411) corresponding to the half-bridge module (412) is turned on. The two rectifier modules (411) are connected in parallel, and the output voltage of the output circuit (41) is equal to the output voltage of the rectifier module (411). or, In response to the short-circuit signal, the upper arms of the two half-bridge modules (412) are turned on, and the output voltage of the output circuit (41) is equal to zero.

9. A high-voltage switching module, characterized in that: The circuit includes the output circuit (41) described in claim 1 or 4 above. The output circuit (41) has one unit. The first input terminal of the output circuit (41) is connected to the first input terminal of the high voltage switching module (4), and the second input terminal of the output circuit (41) is connected to the second input terminal of the high voltage switching module (4). The first output terminal and the second output terminal of the high voltage switching module (4) are respectively connected to the two output terminals of the output circuit (41) in a one-to-one correspondence. or, There are at least two output circuits (41). The two ends of the input terminals of all the output circuits (41) connected in series or in parallel are connected to the first input terminal and the second input terminal of the high voltage switching module (4). The output terminals of all the output circuits (41) are connected in series. The first output terminal and the second output terminal of the high voltage switching module (4) are connected to the two ends of the series connection of all the output circuits (41) one by one.

10. A high-voltage generator, characterized in that, include: Inverter (2), the input terminal of the inverter (2) is connected to a DC power supply (1), and the output terminal of the inverter (2) outputs a first AC power; The transformer (3) has its primary side connected to the output terminal of the inverter (2) to receive the first AC power, and its secondary side is used to output the second AC power. The high-voltage switching module (4) of claim 9 above, wherein the first input terminal of the high-voltage switching module (4) is connected to one end of the secondary side of the transformer (3), and the second input terminal of the high-voltage switching module (4) is connected to the other end of the secondary side of the transformer (3); The high voltage switching module (4) is used to output high voltage DC power with adjustable amplitude between its first and second output terminals.

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