Pulse power supply circuit, power supply device, excitation power supply and control method

Abstract

The invention relates to the technical field of pulse power supplies, and provides a pulse power supply circuit, a power supply device, an excitation power supply and a control method. The input end of the hybrid full-bridge module is connected with the output end of the buck-boost module, and the output end of the hybrid full-bridge module is used for being connected with a load; the control module is connected with the controlled end of the buck-boost module and the controlled end of the hybrid full-bridge module; wherein the hybrid full-bridge module comprises a triode unit and a switch unit, and the triode unit is used for stabilizing the output current. By utilizing the linear region characteristic of the triode unit, even if the input voltage fluctuates, the output current of the triode unit is controlled by the controlled end, so that the output current is more stable and the output ripple is reduced, and the triode unit has the advantage of quick response, thereby being beneficial to improving the current output precision and reducing the tracking error.

Description

Technical Field

[0001] This invention relates to the field of pulse power supply technology, and in particular to a pulse power supply circuit, power supply device, excitation power supply and control method. Background Technology

[0002] In particle accelerators, the excitation power supply provides current to the magnet load to generate a magnetic field, which in turn confines the beam's motion. The flat-bottom and flat-top sections of the pulsed current correspond to the beam injection and extraction sections, respectively, both requiring stable current to ensure beam quality. Conventional pulsed power supplies use a fully switched-mode power supply to generate the pulsed current. In the flat-bottom section, the switched-mode power supply generates significant ripple, affecting magnetic field stability and consequently beam quality. Summary of the Invention

[0003] This invention provides a pulse power supply circuit, power supply device, excitation power supply and control method to solve the defect in the prior art that the pulse power supply will generate large ripple in the flat bottom section of the current.

[0004] This invention provides a pulse power supply circuit, comprising: A buck-boost module, wherein the input terminal of the buck-boost module is connected to a power supply; A hybrid full-bridge module, wherein the input terminal of the hybrid full-bridge module is connected to the output terminal of the buck-boost module, and the output terminal of the hybrid full-bridge module is used to connect to the load; The control module is connected to the controlled terminal of the buck-boost module and the controlled terminal of the hybrid full-bridge module; The hybrid full-bridge module includes a transistor unit and a switching unit, wherein the transistor unit is used to stabilize the output current.

[0005] According to a pulse power supply circuit provided by the present invention, an energy storage and recovery module is further included. The energy storage and recovery module is connected to the output terminal of the buck-boost module and the input terminal of the hybrid full-bridge module. The output terminal of the hybrid full-bridge module is connected to an inductive load. The energy storage and recovery module is used to store the electrical energy released by the inductive load.

[0006] According to a pulse power supply circuit provided by the present invention, the hybrid full-bridge module includes a first switching unit, a second switching unit, and a third switching unit. The transistor unit is connected to the first switching unit to form a first bridge arm circuit, and the second switching unit is connected to the third switching unit to form a second bridge arm circuit. The first bridge arm circuit and the second bridge arm circuit are connected in parallel, and the two ends of the parallel connection are connected to the output terminal of the buck-boost module. The connection midpoint of the first bridge arm circuit and the connection midpoint of the second bridge arm circuit are both connected to the load.

[0007] According to a pulse power supply circuit provided by the present invention, the transistor unit includes multiple transistors, the collectors of the multiple transistors are all connected to the output terminal of the buck-boost module, the emitters of the multiple transistors are connected to the first switching unit, and the bases of the multiple transistors are all connected to the control module.

[0008] According to the pulse power supply circuit provided by the present invention, the transistor is a Darlington transistor.

[0009] According to a pulse power supply circuit provided by the present invention, the first switching unit includes at least one first switching transistor, and when at least two first switching transistors are included, the first switching transistors are connected in parallel. One end of the first switching transistor is connected to the transistor unit and the load respectively, and the other end of the first switching transistor is connected to the output terminal of the buck-boost module. The control module is connected to the controlled terminal of the first switching transistor. The second switching unit includes at least one second switching transistor. When at least two second switching transistors are included, the second switching transistors are connected in parallel. One end of the second switching transistor is connected to the transistor unit and the load, respectively. The other end of the second switching transistor is connected to the output terminal of the buck-boost module. The control module is connected to the controlled terminal of the second switching transistor. The third switching unit includes at least one third switching transistor. When at least two third switching transistors are included, the third switching transistors are connected in parallel. One end of the third switching transistor is connected to the transistor unit and the load, respectively. The other end of the third switching transistor is connected to the output terminal of the buck-boost module. The control module is connected to the controlled terminal of the third switching transistor.

[0010] According to a pulse power supply circuit provided by the present invention, the buck-boost module includes a fourth switch, a fifth switch, and an inductor. One end of the fourth switch is connected to a power supply, and the other end of the fourth switch is connected to one end of the fifth switch and one end of the inductor. The other end of the inductor is connected to a hybrid full-bridge module. The other end of the fifth switch is connected to both the power supply and the hybrid full-bridge module. The control module is connected to the controlled terminals of the fourth and fifth switches.

[0011] The present invention also provides a power supply device, including the pulse power supply circuit described above.

[0012] The present invention also provides an excitation power supply for a particle accelerator, the excitation power supply including the pulse power supply circuit described above, wherein the output terminal of the hybrid full-bridge module is connected to a magnetic load.

[0013] The present invention also provides a power supply control method applied to the excitation power supply of a particle accelerator as described above, comprising: During the current rise phase, the buck-boost module is controlled to operate in buck mode, and the hybrid full-bridge module is controlled to make the transistor unit operate in the linear region to stabilize the output current. During the current decrease phase, the buck-boost module is controlled to operate in boost mode, and the hybrid full-bridge module is controlled to store the induced current generated by the magnetic load into the energy recovery module.

[0014] This invention provides a pulse power supply circuit, power supply device, particle accelerator, and control method, which have at least the following beneficial effects: The buck-boost module obtains electrical energy from the power supply. Under the control of the control module, it dynamically adjusts the voltage input to the hybrid full-bridge module. The hybrid full-bridge module includes transistor units and switching units, forming a hybrid full-bridge circuit. Under the action of the control module, it controls the pulse current output to the load. Utilizing the linear region characteristics of the transistor units, even if the input voltage fluctuates, the output current of the transistor units is controlled by the controlled terminal, making the output current more stable and reducing output ripple. Furthermore, the transistor units have the advantage of fast response, which helps improve current output accuracy and reduce tracking errors. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this invention or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a circuit diagram of one embodiment of a pulse power supply circuit provided by the present invention.

[0017] Figure 2 This is a structural block diagram of a pulse power supply circuit provided by the present invention.

[0018] Figure 3 This is a schematic diagram of the current path when outputting electrical energy in one embodiment of the pulse power supply circuit provided by the present invention.

[0019] Figure 4 This is a schematic diagram of the current path when the pulse power supply circuit provided by the present invention stops outputting electrical energy, according to one embodiment.

[0020] Figure 5 This is a timing waveform diagram of the output current according to one embodiment of the present invention.

[0021] Figure label: 100: Buck-Boost Module; 110: Fourth Switch; 120: Fifth Switch; 130: Inductor; 200: Hybrid Full-Bridge Module; 210: Transistor Unit; 220: First Switch Unit; 230: Second Switch Unit; 240: Third Switch Unit; 300: Control Module; 400: Energy Storage and Recovery Module; 500: Filter Capacitor. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0023] The following is combined Figures 1 to 4 A pulse power supply circuit according to the present invention includes: A boost / buck module 100, wherein the input terminal of the boost / buck module 100 is connected to a power supply; A hybrid full-bridge module 200, wherein the input terminal of the hybrid full-bridge module 200 is connected to the output terminal of the buck-boost module 100, and the output terminal of the hybrid full-bridge module 200 is used to connect to the load; The control module 300 is connected to the controlled end of the boost / buck module 100 and the controlled end of the hybrid full-bridge module 200. The hybrid full-bridge module 200 includes a transistor unit 210 and a switching unit, wherein the transistor unit 210 is used to stabilize the output current.

[0024] The step-up / step-down module 100 obtains electrical energy from the power supply and, under the control of the control module 300, dynamically adjusts the voltage input to the hybrid full-bridge module 200. The hybrid full-bridge module 200 includes a transistor unit 210 and a switching unit, which together form a hybrid full-bridge circuit. Under the control of the control module 300, it controls the pulse current output to the load. Utilizing the linear region characteristics of the transistor unit 210, even if the input voltage fluctuates, the output current of the transistor unit 210 is controlled by the controlled terminal, making the output current more stable and reducing output ripple. Furthermore, the transistor unit 210 has the advantage of fast response, which helps improve current output accuracy and reduce tracking error.

[0025] Understandably, in particle accelerator applications, making the output current more stable and reducing output ripple can make the generated magnetic field more stable. Especially in the flat-bottom section of the current, lower output ripple can improve the stability of beam injection and improve beam quality.

[0026] The transistor unit 210 includes a transistor. It can be understood that when the transistor is operating in the linear region, the current of the collector and emitter is determined by the base current. As long as the control module 300 controls the base current with no change in input, the output current can be kept stable.

[0027] In some embodiments of the present invention, the control module 300 may include implementations of devices with control functions such as microcontrollers and embedded chips. In some embodiments, the control module 300 may include implementations of a bias circuit and a controller, wherein the bias circuit is connected to the controlled terminal, i.e., the base, of the transistor unit 210 to ensure that the transistor unit 210 operates in the linear region.

[0028] refer to Figure 1 and Figure 2 In some embodiments of the pulse power supply circuit of the present invention, an energy storage and recovery module 400 is further included. The energy storage and recovery module 400 is connected to the output terminal of the buck-boost module 100 and the input terminal of the hybrid full-bridge module 200. The output terminal of the hybrid full-bridge module 200 is connected to an inductive load. The energy storage and recovery module 400 is used to store the electrical energy released by the inductive load.

[0029] When the load is inductive, it releases stored electrical energy as the current decreases. The hybrid full-bridge module 200 provides a path for this energy release. An energy recovery module 400 is connected to the input of the hybrid full-bridge module 200. When the inductive load releases energy, creating a current flowing through the hybrid full-bridge module 200, the current flows to the energy recovery module 400, thus recovering and storing the released energy. In this way, by recovering and storing the released energy from the inductive load through the energy recovery module 400, and then releasing the stored energy when outputting power to the inductive load later, the energy is reused, improving energy efficiency and reducing power loss.

[0030] refer to Figure 1 In some embodiments of the present invention, the energy storage and recovery module 400 includes a capacitor C2, which is connected in parallel with the output terminal of the buck-boost module 100 and the input terminal of the hybrid full-bridge module 200, thereby utilizing the energy storage function of the capacitor C2 to achieve the purpose of energy storage and recovery. In some embodiments, the energy storage and recovery module 400 may also include multiple parallel capacitors.

[0031] refer to Figure 1In some embodiments of a pulse power supply circuit of the present invention, the hybrid full-bridge module 200 includes a first switching unit 220, a second switching unit 230, and a third switching unit 240. The transistor unit 210 is connected to the first switching unit 220 to form a first bridge arm circuit, and the second switching unit 230 is connected to the third switching unit 240 to form a second bridge arm circuit. The first bridge arm circuit and the second bridge arm circuit are connected in parallel, and the two ends of the parallel connection are connected to the output terminal of the buck-boost module 100. The connection midpoint of the first bridge arm circuit and the connection midpoint of the second bridge arm circuit are both connected to the load.

[0032] Transistor unit 210 and first switching unit 220 are connected to form the first bridge arm circuit. The connection point between transistor unit 210 and first switching unit 220, i.e., the midpoint of the connection, serves as the first output terminal of the hybrid full-bridge module 200 and is connected to the load. Second switching unit 230 and third switching unit 240 are connected to form the second bridge arm circuit. The connection point between second switching unit 230 and third switching unit 240, i.e., the midpoint of the connection, serves as the second output terminal of the hybrid full-bridge module 200 and is connected to the load. Because the first and second bridge arm circuits combine transistor unit 210 and switching power supply, they form a hybrid full-bridge circuit. This allows the linear region characteristics of transistor unit 210 to reduce output ripple and provides a fast response. At the same time, the low conduction loss of the switching unit ensures the efficiency of the power supply.

[0033] In one embodiment of the present invention, the current path when outputting current to the load is as follows: Figure 3 As shown, in the hybrid full-bridge module 200, current flows from transistor unit 210 to the load. Transistor unit 210 stabilizes the output current to the load, reducing output ripple. After flowing through the load, the current returns through the third switching unit 240, forming a loop. The load is inductive. When the inductive load current decreases, the inductive load releases electrical energy. The current path is as follows: Figure 4 As shown, in the hybrid full-bridge module 200, the first switching unit 220 and the second switching unit 230 provide a circuit path for the inductive load to release electrical energy. The current flows from the first switching unit 220 through the inductive load and returns to the second switching unit 230 to form a loop. When an energy storage and recovery module 400 is provided, part of the current flows to the energy storage and recovery module 400 for recovery and storage.

[0034] In some embodiments of the present invention, depending on the actual application requirements, the hybrid full-bridge module 200 may also include an embodiment in which two transistor units 210 and two switching units form a hybrid full-bridge circuit, or an embodiment in which three transistor units 210 and one switching unit form a hybrid full-bridge circuit.

[0035] refer to Figure 1In some embodiments of a pulse power supply circuit of the present invention, the transistor unit 210 includes a plurality of transistors, the collectors of the plurality of transistors are all connected to the output terminal of the buck-boost module 100, the emitters of the plurality of transistors are connected to the first switching unit 220, and the bases of the plurality of transistors are all connected to the control module 300.

[0036] Transistor unit 210 includes multiple transistors connected in parallel, which can increase the maximum current flowing through transistor unit 210, improve current output capability, and adapt to high current application scenarios. At the same time, the base is independently controlled by control module 300 to ensure the consistency of operation in the linear region and enhance the ripple suppression stability under high current.

[0037] In some embodiments of a pulse power supply circuit of the present invention, the transistor is a Darlington transistor.

[0038] The transistor adopts a Darlington structure. Utilizing the high current amplification characteristic of the Darlington structure transistor, the control module 300 can control the Darlington structure transistor with a smaller output current, reducing the performance requirements of the control module 300 driving the transistor unit 210. Furthermore, it enables the control unit to achieve precise linear regulation of the load current with a smaller base drive current, thereby reducing the power consumption of the control module 300.

[0039] refer to Figure 1 In some embodiments of a pulse power supply circuit of the present invention, the first switching unit 220 includes at least one first switching transistor. When at least two first switching transistors are included, the first switching transistors are connected in parallel. One end of the first switching transistor is connected to the transistor unit 210 and the load, respectively. The other end of the first switching transistor is connected to the output terminal of the buck-boost module 100. The control module 300 is connected to the controlled terminal of the first switching transistor. The second switching unit 230 includes at least one second switching transistor. When at least two second switching transistors are included, the second switching transistors are connected in parallel. One end of the second switching transistor is connected to the transistor unit 210 and the load, respectively. The other end of the second switching transistor is connected to the output terminal of the buck-boost module 100. The control module 300 is connected to the controlled terminal of the second switching transistor. The third switching unit 240 includes at least one third switching transistor. When at least two third switching transistors are included, the third switching transistors are connected in parallel. One end of the third switching transistor is connected to the transistor unit 210 and the load, respectively. The other end of the third switching transistor is connected to the output terminal of the buck-boost module 100. The control module 300 is connected to the controlled terminal of the third switching transistor.

[0040] In the above embodiments, the first switching unit 220, the second switching unit 230, and the third switching unit 240 may include only one switching transistor in low-power scenarios, or multiple parallel switching transistors in high-power scenarios, depending on the application scenario requirements. By connecting them in parallel, the conduction current capacity can be expanded to adapt to the load requirements of different power levels. At the same time, the parallel current sharing design avoids overheating of local switching transistors and improves system reliability.

[0041] In some embodiments of the present invention, the first switching transistor, the second switching transistor, and the third switching transistor can be embodiments of devices with switching functions such as IGBTs or MOSFETs.

[0042] refer to Figure 1 In some embodiments of a pulse power supply circuit of the present invention, the buck-boost module 100 includes a fourth switch 110, a fifth switch 120, and an inductor 130. One end of the fourth switch 110 is connected to the power supply, and the other end of the fourth switch 110 is connected to one end of the fifth switch 120 and one end of the inductor 130, respectively. The other end of the inductor 130 is connected to the hybrid full-bridge module 200, and the other end of the fifth switch 120 is connected to the power supply and the hybrid full-bridge module 200, respectively. The control module 300 is connected to the controlled terminal of the fourth switch 110 and the controlled terminal of the fifth switch 120, respectively.

[0043] The fourth switch 110 can chop the input voltage, achieving a step-down effect on the power supply input voltage; the fifth switch 120, in conjunction with the inductor 130, allows the electrical energy released by the inductive load to be recovered and stored in the energy recovery module 400, achieving a step-up effect across the energy recovery module 400. Thus, when outputting electrical energy, the voltage drop across the transistor unit 210 is maintained, and the output voltage is provided; when outputting electrical energy stops, the energy recovery module 400 recovers and stores the electrical energy released by the load, improving power efficiency.

[0044] refer to Figure 3 When outputting electrical energy to the load, the fourth switch 110 is turned on and the fifth switch 120 is turned off. Current flows from the power supply through the fourth switch 110, inductor 130, and transistor unit 210 to the load, and then returns to the power supply through the third switch unit 240 to form a loop. When outputting electrical energy to the load, the buck-boost module 100 operates in buck mode to ensure the voltage drop across transistor unit 210 and to provide the output voltage.

[0045] refer to Figure 4When the load is inductive, upon ceasing power output to the inductive load, the fourth switch 110 is turned off and the fifth switch 120 is turned on. Current flows from the load through the second switch unit 230, inductor 130, fifth switch 120, and first switch unit 220 back to the inductive load, achieving freewheeling. A portion of the current flowing out of the second switch unit 230 returns to the inductive load via the energy recovery module 400, thus achieving energy recovery and storage. When ceasing power output to the inductive load, the buck-boost module 100 operates in boost mode, gradually increasing the voltage of the energy recovery module 400. This allows the energy released by the inductive load to be recovered and stored in the energy recovery module 400, achieving energy reuse and improving power efficiency.

[0046] refer to Figure 4 In some embodiments of the present invention, the first switching unit 220 and the second switching unit 230 employ MOSFETs, and the MOSFETs are connected in reverse parallel with diodes. When power output to the inductive load stops, the current can freewheel through the diodes connected in reverse parallel with the MOSFETs. In some embodiments of the present invention, the first switching unit 220 and the second switching unit 230 employ IGBTs, and the IGBTs are connected in reverse parallel with diodes. When power output to the inductive load stops, the current can flow through the diodes connected in reverse parallel with the IGBTs in the first switching unit 220 and the second switching unit 230, achieving the purpose of freewheeling.

[0047] refer to Figure 1 In some embodiments of a pulse power supply circuit of the present invention, a filter capacitor 500 is also included, which is connected to the input terminal of the buck-boost module 100.

[0048] A filter capacitor 500 is connected in parallel between the power supply and the buck-boost module 100. The filter capacitor 500 filters the power supply, i.e. the power source, to reduce the input voltage fluctuation of the buck-boost module 100, thereby ensuring the purity of the hybrid full-bridge input voltage and further improving the stability of the output current.

[0049] The following describes a power supply device provided by the present invention. The power supply device described below can be referred to in correspondence with the pulse power supply circuit described above.

[0050] The present invention also provides a power supply device, including the pulse power supply circuit described above.

[0051] In the power supply unit, the step-up / step-down module 100 obtains electrical energy from the power supply. Under the control of the control module 300, it dynamically adjusts the voltage input to the hybrid full-bridge module 200. The hybrid full-bridge module 200 includes a transistor unit 210 and a switching unit, which form a hybrid full-bridge circuit. Under the action of the control module 300, it controls the pulse current output to the load. Utilizing the linear region characteristics of the transistor unit 210, even if the input voltage fluctuates, the output current of the transistor unit 210 is controlled by the controlled terminal, making the output current more stable and reducing output ripple. Furthermore, the transistor unit 210 has the advantage of fast response, which helps to improve current output accuracy and reduce tracking error, thereby improving the output performance of the power supply.

[0052] The excitation power supply for a particle accelerator provided by the present invention is described below. The excitation power supply for a particle accelerator described below can be referred to in correspondence with the pulse power supply circuit described above.

[0053] refer to Figure 1 The present invention also provides an excitation power supply for a particle accelerator, the excitation power supply including a pulse power supply circuit, wherein the output terminal of the hybrid full-bridge module 200 is connected to a magnetic load.

[0054] The excitation power supply outputs electrical energy to the magnetic load, causing the magnetic load to form a magnetic field, thereby confining the beam's movement and facilitating particle acceleration. In the excitation power supply, the buck-boost module 100 obtains electrical energy from the power supply and, under the control of the control module 300, dynamically adjusts the voltage input to the hybrid full-bridge module 200. The hybrid full-bridge module 200 includes a transistor unit 210 and a switching unit, forming a hybrid full-bridge circuit. Under the control of the control module 300, it controls the current output to the magnetic load. Utilizing the linear region characteristics of the transistor unit 210, even with input voltage fluctuations, the output current of the transistor unit 210 is controlled by the controlled terminal, making the output current more stable and thus reducing output ripple.

[0055] Since the strength of the magnetic field generated by the magnet load is determined by the current flowing through it, the magnetic field generated by the magnet load can be made more stable and reliable. Furthermore, the transistor unit 210 has the advantage of fast response, which helps to improve the accuracy of current output and reduce tracking error. This makes it easier to control the strength of the magnetic field generated by the magnet load more accurately and improve the beam quality.

[0056] The following describes a power control method provided by the present invention. The power control method described below can be referred to in correspondence with the excitation power supply of a particle accelerator described above.

[0057] The present invention also provides a power supply control method applied to the excitation power supply of a particle accelerator as described above, comprising: During the current rise phase, the buck-boost module 100 is controlled to operate in buck mode, and the hybrid full-bridge module 200 is controlled to make the transistor unit 210 operate in the linear region to stabilize the output current. During the current decrease phase, the buck-boost module 100 is controlled to operate in boost mode, and the hybrid full-bridge module 200 is controlled to store the induced current generated by the magnetic load into the energy recovery module 400.

[0058] refer to Figure 5 , Figure 5 This is a timing waveform diagram of the excitation power supply output current to the magnet load. During the process of the current rising from the bottom to the top of the flat section, i.e. Figure 5 In the TR1 to TP2 stage, the control module 300 controls the buck-boost module 100 to operate in buck mode, ensuring the voltage drop across the transistor unit 210 and providing the output voltage. Simultaneously, the control module 300 provides base current to the transistor unit 210, ensuring it operates in the linear region, thus stabilizing the output current, reducing output ripple, and stabilizing the magnetic field generated by the magnet load. This provides a reliable magnetic field for beam injection, improving beam quality. During the current decrease phase, i.e. Figure 5 During the mid-TF stage, the control module 300 controls the buck-boost module 100 to operate in boost mode, so that the voltage of the energy recovery module 400 gradually increases, allowing the electrical energy released by the inductive load to be recovered and stored in the energy recovery module 400, realizing the reuse of energy and improving power efficiency.

[0059] refer to Figure 5 During the current rise phase, the output current has a flat bottom section TP1 to ensure that the magnetic load generates a stable magnetic field, facilitating beam injection. Subsequently, as the beam is accelerated, a stronger magnetic field is needed to confine the beam, thus the output current will continue to increase, corresponding to TR2.

[0060] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pulse power supply circuit, characterized in that, include: A boost / buck module (100), the input terminal of which is connected to a power supply; A hybrid full-bridge module (200) is provided, wherein the input terminal of the hybrid full-bridge module (200) is connected to the output terminal of the buck-boost module (100), and the output terminal of the hybrid full-bridge module (200) is used to connect to the load. The control module (300) is connected to the controlled end of the boost / buck module (100) and the controlled end of the hybrid full-bridge module (200); The hybrid full-bridge module (200) includes a transistor unit (210) and a switching unit, wherein the transistor unit (210) is used to stabilize the output current.

2. The pulse power supply circuit according to claim 1, characterized in that, It also includes an energy recovery module (400), which is connected to the output terminal of the buck-boost module (100) and the input terminal of the hybrid full-bridge module (200). The output terminal of the hybrid full-bridge module (200) is connected to the inductive load. The energy recovery module (400) is used to store the electrical energy released by the inductive load.

3. The pulse power supply circuit according to claim 2, characterized in that, The hybrid full-bridge module (200) includes a first switching unit (220), a second switching unit (230), and a third switching unit (240). The transistor unit (210) is connected to the first switching unit (220) to form a first bridge arm circuit. The second switching unit (230) is connected to the third switching unit (240) to form a second bridge arm circuit. The first bridge arm circuit and the second bridge arm circuit are connected in parallel, and the two ends of the parallel connection are connected to the output terminal of the buck-boost module (100). The connection midpoint of the first bridge arm circuit and the connection midpoint of the second bridge arm circuit are both connected to the load.

4. A pulse power supply circuit according to claim 3, characterized in that, The transistor unit (210) includes multiple transistors, the collectors of the multiple transistors are connected to the output terminal of the buck-boost module (100), the emitters of the multiple transistors are connected to the first switching unit (220), and the bases of the multiple transistors are connected to the control module (300).

5. A pulse power supply circuit according to claim 4, characterized in that, The transistor is a Darlington transistor.

6. A pulse power supply circuit according to claim 3, characterized in that, The first switching unit (220) includes at least one first switching transistor. When at least two first switching transistors are included, the first switching transistors are connected in parallel. One end of the first switching transistor is connected to the transistor unit (210) and the load, respectively. The other end of the first switching transistor is connected to the output terminal of the buck-boost module (100). The control module (300) is connected to the controlled terminal of the first switching transistor. The second switching unit (230) includes at least one second switching transistor. When at least two second switching transistors are included, the second switching transistors are connected in parallel. One end of the second switching transistor is connected to the transistor unit (210) and the load, respectively. The other end of the second switching transistor is connected to the output terminal of the buck-boost module (100). The control module (300) is connected to the controlled terminal of the second switching transistor. The third switching unit (240) includes at least one third switching transistor. When at least two third switching transistors are included, the third switching transistors are connected in parallel. One end of the third switching transistor is connected to the transistor unit (210) and the load, respectively. The other end of the third switching transistor is connected to the output terminal of the buck-boost module (100). The control module (300) is connected to the controlled terminal of the third switching transistor.

7. A pulse power supply circuit according to claim 2, characterized in that, The buck-boost module (100) includes a fourth switch (110), a fifth switch (120), and an inductor (130). One end of the fourth switch (110) is connected to the power supply, and the other end of the fourth switch (110) is connected to one end of the fifth switch (120) and one end of the inductor (130). The other end of the inductor (130) is connected to the hybrid full-bridge module (200). The other end of the fifth switch (120) is connected to the power supply and the hybrid full-bridge module (200). The control module (300) is connected to the controlled end of the fourth switch (110) and the controlled end of the fifth switch (120).

8. A power supply device, characterized in that, Includes a pulse power supply circuit as described in any one of claims 1 to 7.

9. An excitation power supply for a particle accelerator, characterized in that, The excitation power supply includes a pulse power supply circuit as described in any one of claims 2 to 7, wherein the output terminal of the hybrid full-bridge module (200) is connected to the magnet load.

10. A power supply control method, characterized in that, An excitation power supply for a particle accelerator according to claim 9, comprising: During the current rise phase, the buck-boost module (100) is controlled to operate in buck mode, and the hybrid full-bridge module (200) is controlled to make the transistor unit (210) operate in the linear region to stabilize the output current; During the current decrease phase, the buck-boost module (100) is controlled to operate in boost mode, and the hybrid full-bridge module (200) is controlled to store the induced current generated by the magnetic load into the energy recovery module (400).

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