500kV high-frequency high-voltage power supply device

Abstract

The utility model provides a 500kV high-frequency and high-voltage power supply device, which comprises a high-frequency and high-voltage controller and a high-frequency and high-voltage generator, the high-frequency high-voltage generator comprises a high-voltage output interface, a filament conversion module, a high-voltage voltage-multiplying module, a high-voltage interface circuit, a feedback module, an arc monitoring module and a protection module. The high-frequency and high-voltage controller comprises an STM32F103 processor, a high-voltage driving module, a protection circuit, a power supply circuit, a tube voltage closed-loop control circuit, a filament driving module, a tube current closed-loop control circuit, a control interface circuit, a signal acquisition circuit and a man-machine communication module; the high-frequency high-voltage generator automatically monitors the system by adopting an electric arc identification technical means, when the system has an electric arc, the generated strong electric arc or weak electric arc is identified, the electric arc monitoring module quickly sends out an electric arc monitoring action and transmits the electric arc monitoring action to the STM32F103 processor through the high-voltage interface circuit to make a series of electric arc processing actions, and the electric arc processing action is controlled by the high-frequency high-voltage generator. And the high-frequency high-voltage generator is protected.

Description

Technical Field

[0001] The present invention relates to a high-frequency and high-voltage power supply device, in particular to a high-frequency and high-voltage power supply device for 500kV. Background Art

[0002] High-frequency high-voltage power supply is an important part of X-ray system. The high voltage level of the power supply determines the occasions where the power supply is applied. With the application of modern industrial X-ray, there are extremely demanding requirements. With the increase of voltage level, the current technical means make it difficult for the existing high-frequency high-voltage power supply device to operate stably and reliably in the system. The stability is poor and the reliability is low. For the existing high-frequency high-voltage device, after being applied to voltage levels above 450kV or even higher, there will be arc problems at high voltage levels. The high-frequency high-voltage system with high voltage levels will have arc discharge problems. The cost of an X-ray tube is at least hundreds of thousands or even millions. If it is applied to a high-level high-frequency high-voltage device, when a strong arc is generated, the system does not make corresponding actions, which may cause irreparable damage to the X-ray tube. The application of modern industrial X-ray system is very limited. Only stable and reliable high-frequency high-voltage power supply system can be applied to high-level high-voltage devices. For the shortcomings of poor high-voltage stability and low reliability of the existing technology, there are arc discharge problems at high voltage, which cannot meet the demanding application requirements of modern industrial X-ray. There is an urgent need for a high-frequency high-voltage device that can be applied to high voltage levels in a high voltage of more than 450kV and is stable and reliable. Summary of the invention

[0003] In view of the problems existing in the above-mentioned existing high-frequency and high-voltage power supply system, the present invention proposes a high-frequency and high-voltage power supply device for 500kV.

[0004] To achieve the above object, the present invention provides a 500kV high-frequency high-voltage power supply device, such as Figure 1 The device shown includes: a high-frequency and high-voltage controller and a high-frequency and high-voltage generator;

[0005] The high-frequency high-voltage generator includes: a high-voltage output interface, a filament conversion module, a high-voltage voltage multiplier module, a high-voltage interface circuit, a feedback module, an arc monitoring module, and a protection module;

[0006] Among them, the high-frequency high-voltage controller includes: STM32F103 processor, high-voltage drive module, protection circuit, power supply circuit, tube voltage closed-loop control circuit, filament drive module, tube current closed-loop control circuit, control interface circuit, signal acquisition circuit, and human-computer communication module;

[0007] Among them, the interface PB15 of the STM32F103 processor is connected to the high-voltage drive module, the interface PB14 of the STM32F103 processor is connected to the filament drive module, the interface PA12 of the STM32F103 processor is connected to the power supply circuit, the high-voltage drive module and the filament drive module are respectively connected to the high-voltage interface circuit, the high-voltage interface circuit is respectively connected to the filament conversion module and the high-voltage voltage doubling module, the high-voltage interface circuit is respectively connected to the signal feedback module, the arc monitoring module and the protection module, the filament conversion module and the high-voltage voltage doubling module are simultaneously connected to the high-voltage output interface, the interface PB14 of the STM32F103 processor is connected to the tube flow closed-loop control circuit, the STM32 Interface PB10 of the F103 processor is connected to the protection circuit, interface PB12 of the STM32F103 processor is connected to the interface sending end of the human-machine communication module, interface PB13 of the STM32F103 processor is connected to the interface receiving end of the human-machine communication module, interface PB0, interface PB1, and interface PB2 of the STM32F103 processor are connected to the output interface of the signal acquisition circuit, interface PA3, interface PA4, and interface PA5 of the central processing unit are connected to the control interface circuit, interface PB10 of the central processing unit is connected to the protection circuit, and interface PA15 and interface PB5 of the STM32F103 processor are connected to the tube pressure closed-loop controller circuit 11.

[0008] A high-frequency and high-voltage power supply device for 500 kV adopts an STM32F103 processor as a control core. The control core of the device also includes a filament drive module, a high-voltage drive module, a signal acquisition circuit, a tube current closed-loop control circuit, and a tube voltage closed-loop control circuit; the STM32F103 processor is connected with a human-machine communication module, a power supply circuit, a protection circuit, and a control interface circuit.

[0009] A high-frequency high-voltage power supply device for 500kV, using a high-voltage voltage doubling module as a high-voltage core, the high-voltage core of the device also includes a filament conversion module, a signal feedback module, a protection module, a high-voltage interface circuit and a high-voltage output interface, the high-voltage interface circuit of the high-frequency high-voltage generator is connected to the high-voltage drive module and the filament drive module of the high-frequency high-voltage controller, and the high-voltage interface circuit is connected to the high-voltage voltage doubling module and the filament conversion module, the high-voltage voltage doubling module is connected to the high-voltage output interface, the filament conversion module is connected to the high-voltage output interface, and the high-voltage interface circuit of the high-frequency high-voltage generator is connected to the arc monitoring module;

[0010] The device adopts the double insulation technology of integral module casting insulation and 45# transformer oil insulation protection to ensure the reliable insulation of high voltage system;

[0011] Among them, the high-voltage insulation of this device adopts the voltage doubler module casting technology, and the voltage doubler module is integrally cast with insulating polyurethane material to further improve its insulation level;

[0012] Among them, the high-voltage insulation of this device adopts the filament module casting technology, and the filament module is integrally cast with insulating polyurethane material to further improve its insulation level;

[0013] Among them, the 45# transformer oil with extremely strong insulation is injected into the high-frequency high-voltage generator as the insulating medium to ensure the reliable insulation of the high-voltage system;

[0014] Among them, the high-frequency and high-voltage control circuit adopts a full-bridge circuit with high-stable output and pre-stage boost and voltage regulation; the high-frequency and high-voltage generator adopts a multi-voltage rectifier circuit with low output ripple;

[0015] Among them, the filament loading and high voltage control technology adopts filament closed-loop control technology, tube pressure closed-loop control technology, and dual closed-loop controller technology to ensure the stable operation of the system's tube pressure and tube flow;

[0016] Among them, interface PA3, interface PA4, and interface PA5 of the STM32F103 processor are connected to the interface control circuit, and interface PB0, interface PB1, and interface PB2 of the STM32F103 processor are connected to the signal acquisition circuit, which detects the peripheral temperature signal output port of the circulating heat dissipation in real time, reads the temperature and flow of the system in time, and then transmits the signal to the outside through the human-computer communication module.

[0017] The beneficial technical effects of the present invention are as follows: the above technology is adopted to overcome the shortcomings and disadvantages of the prior art. The 500kV high-frequency high-voltage power supply adopts the arc automatic identification technology, which automatically identifies the strong and weak arcs when the arc occurs and makes a series of protection actions to effectively protect the operation stability and reliability of the high-frequency high-voltage power supply device. The arc automatic identification technology can enable the high-frequency high-voltage generator to deliver a high voltage level of 500kV or even a higher voltage level; the system adopts the automatic identification technology of strong and weak arc double detection, which can effectively ensure that the system parameters are always operated and used at the optimal parameters, and can also ensure that the system can operate stably and reliably for a long time; at the same time, the high-voltage pressed modular casting and the filament part modular casting technology are adopted, and 45 transformer oil is injected into the generator, and the reliable insulation of the high-voltage system is ensured under the double insulation technology of the insulating medium and the casting modular insulating medium. The system collects the flow and temperature of the cooling device in real time, and transmits them through the human-machine communication port, and protects the high-voltage power supply device. This device not only has the characteristics of good stability and high reliability, but also solves the problem of arc discharge at high voltage, and can be applied to the application requirements of modern industrial X-rays, and has broad development space. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, 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 invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 :Structural block diagram of a high-frequency high-voltage power supply device for 500kV

[0020] Figure 2 : Partial enlarged view of the processor connection part

[0021] Figure 3 : Partial enlargement of the arc monitoring part

[0022] Figure 4 : A partial enlarged view of the high voltage multiplier and filament transmission part

[0023] Figure 5 : A partial enlarged view of the high voltage drive and filament drive parts

[0024] Figure 6 : Partial enlargement of the closed-loop control part of the pipe flow

[0025] In the figure: 1. high voltage output interface, 2. filament conversion module, 3. high voltage doubler module, 4. high voltage interface circuit, 5. feedback module, 6. arc monitoring module, 7. protection module, 8. high voltage drive module, 9. protection circuit, 10. power supply circuit, 11. tube voltage closed-loop control circuit, 12. filament drive module, 13. STM32F103 processor, 14. tube current closed-loop control circuit, 15. control interface circuit, 16. signal acquisition circuit, 17. human-computer communication module, 301. seventh monitoring capacitor, 302. fifth unidirectional diode, 303. first current limiting resistor, 304. 04, the fourth proportional resistor, 305, the first chip No. B, 306, the fifth proportional resistor, 401, the first step-up transformer, 402, the second high-voltage capacitor, 403, the third high-voltage silicon stack, 404, the ninth high-voltage capacitor, 405, the eighth high-voltage silicon stack, 406, the second filament transformer, 407, the third filament transformer, 501, the third chip No. A, 502, the third chip No. B, 601, the sixth current limiting resistor, 602, the first chip No. A, 603, the eleventh integrating capacitor, 604, the seventh proportional resistor, 605, the twelfth monitoring capacitor, 606, the thirteenth sampling capacitor. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] A high-frequency and high-voltage power supply device for 500 kV, as shown in the figure, comprises: a high-frequency and high-voltage controller 102 and a high-frequency and high-voltage generator 101;

[0030] The high frequency high voltage generator 101 includes: a high voltage output interface 1 , a filament conversion module 2 , a high voltage voltage doubling module 3 , a high voltage interface circuit 4 , a feedback module 5 , an arc monitoring module 6 , and a protection module 7 .

[0031] Among them, the high-frequency high-voltage controller includes: STM32F103 processor 13, high-voltage drive module 8, protection circuit 9, power supply circuit 10, tube voltage closed-loop control circuit 11, filament drive module 12, tube current closed-loop control circuit 14, control interface circuit 15, signal acquisition circuit 16, and human-computer communication module 17.

[0032] Among them, the interface PB15 of the STM32F103 processor 13 is connected to the high-voltage drive module 8 of model 2MBI100VA-120, the interface PB14 of the STM32F103 processor 13 is connected to the filament drive module 12 of model IRF540, the interface PA12 of the STM32F103 processor 13 is connected to the power supply circuit 10 of model IRF360P, the high-voltage drive module 8 and the filament drive module 12 are respectively connected to the high-voltage interface circuit 5, the high-voltage interface circuit 5 is respectively connected to the filament conversion module 2 and the high-voltage voltage doubling module 3, the high-voltage interface circuit 4 is respectively connected to the signal feedback module 5, the arc monitoring module 6 and the protection module 7, the filament conversion module 2 and the high-voltage voltage doubling module 3 are simultaneously connected to the high-voltage output interface 1, and the interface PB14 of the STM32F103 processor 13 A pipe flow closed-loop control circuit 14 with a model of AD822 is connected, an interface PB10 of the STM32F103 processor 13 is connected to a protection circuit 9, an interface PB12 of the STM32F103 processor 13 is connected to an interface transmitting end of a human-machine communication module 17, an interface PB13 of the STM32F103 processor 13 is connected to an interface receiving end of the human-machine communication module 17, interfaces PB0, PB1, and PB2 of the STM32F103 processor 13 are connected to an output interface of a signal acquisition circuit 16, interfaces PA3, PA4, and PA5 of the central processing unit 13 are connected to a control interface circuit 15, an interface PB10 of the central processing unit 13 is connected to a protection circuit 9, and interfaces PA15 and PB5 of the STM32F103 processor are connected to a pipe pressure closed-loop controller circuit 11.

[0033] The high voltage output interface 1 is used to receive the high level voltage generated by the high voltage voltage doubling module 3 and the filament voltage generated by the filament driving module 12 and connected to the X-ray tube for use.

[0034] The filament conversion module 2 is used to receive the filament voltage generated by the filament driving module 12 and convert the filament voltage for use by the X-ray tube filament.

[0035] The high-voltage voltage doubling module 3 is composed of a high-voltage module with a high-voltage capacitor of the FHV series and a high-voltage silicon stack of the ESJC37 series as the core, and is used to receive the primary high voltage generated by the high-voltage driving module and the voltage doubling and boosting to generate a high-voltage electric field for the X-ray tube.

[0036] The high-voltage interface circuit 4 is used to connect the high-frequency and high-voltage controller 102 and the high-frequency and high-voltage generator 101 .

[0037] The feedback module 5 is used to feedback the pipe pressure and pipe flow of the system.

[0038] The arc monitoring module 6 is used to monitor whether the high-frequency and high-voltage generator 101 generates an arc and to make corresponding response actions.

[0039] The protection module 7 is used to protect the ray source generator in time when the system is abnormal.

[0040] The high-voltage driving module 8 is used to generate a voltage that can be changed and adjusted in the front stage of the high-voltage voltage doubling module 3 .

[0041] The protection circuit 9 is used to receive device abnormality signals and shut down the device in time.

[0042] The power supply circuit 10 is used to transform the 380V AC power supply into a high-voltage power supply signal, a filament power supply signal, and a number of auxiliary power supply signals required by the system.

[0043] The filament driving module 12 generates an adjustable filament voltage and sends it to the filament conversion module 2 of the X-ray tube.

[0044] The central processor 13 , model STM32F103, serves as the control core of the high-frequency and high-voltage controller 102 .

[0045] The tube voltage closed-loop control circuit 11 is used to adjust and control the output tube voltage of the high-frequency high-voltage generator 101 to a set tube voltage.

[0046] The mA closed-loop control circuit 14 is used to adjust and control the output tube current of the high-frequency and high-voltage generator 101 to a set tube current.

[0047] The interface control circuit 15 is used to receive the filament, grid voltage, and high-voltage power supply, and send them to the load output after the voltage is stepped up in the high-voltage generator.

[0048] The signal acquisition circuit 16 is used to adjust the peripheral input signal into a useful signal recognizable by the microprocessor, and further make adjustments based on the acquired information.

[0049] The human-machine communication module 17 is used for upper computer display control, sending and receiving communication signals, and personnel operation control system operation.

[0050] A 500kV high-frequency and high-voltage power supply device adopts an STM32F103 processor 13 as a control core. The control core of the device also includes a filament drive module 12, a high-voltage drive module 8, a signal acquisition circuit 16, a tube current closed-loop control circuit 14, and a tube voltage closed-loop control circuit 11; the STM32F103 processor 13 controls the normal operation of the filament drive module 12 and the high-voltage drive module 8 respectively, processes the current signal acquired from the tube current, and then generates a corresponding filament control signal and a high-voltage control signal to control the filament drive module 12 and the high-voltage drive module 8, so that the 500kV high-frequency and high-voltage power supply device generates a system-controllable power supply for use by a high-frequency and high-voltage generator 101. The STM32F103 processor 13 is connected to the human-machine communication module 17, the power supply circuit 10, the protection circuit 9, and the control interface circuit 15. When the system is powered on, the upper computer human-machine communication module 17 sends instructions, and the STM32F103 processor 13 receives the instructions and sends real-time control signals according to the received instructions to make the system run normally. When an abnormality occurs in the system, the protection circuit 9 quickly sends a protection instruction to the STM32F103 processor 13. The STM32F103 processor 13 sends a series of protection actions according to the abnormality and transmits the abnormal information through the human-machine communication module 17 to protect the high-frequency and high-voltage generator 101.

[0051] A high-frequency high-voltage power supply device for 500kV, using a high-voltage voltage doubling module 3 as a high-voltage core, the high-voltage core of the device also includes a filament conversion module 2, a signal feedback module 5, a protection module 7, a high-voltage interface circuit 4 and a high-voltage output interface 1, the high-voltage interface circuit 4 of the high-frequency high-voltage generator 101 is connected to a high-voltage driving module 8 and a filament driving module 12 of a high-frequency high-voltage controller 102, and the high-voltage interface circuit 4 is connected to the high-voltage voltage doubling module 3 and the filament conversion module 2, the high-voltage driving module 8 generates a high-voltage driving power supply for the high-voltage voltage doubling module 3 to generate high voltage, the high-voltage voltage doubling module 3 is connected to the high-voltage output interface 1, the filament driving module 12 generates a filament driving power supply for the filament conversion module 2 to generate a filament voltage, the filament conversion module 2 is connected to the high-voltage output interface 1, the high-voltage interface circuit 4 of the high-frequency high-voltage generator 101 is connected to an arc monitoring module 6, when an arc phenomenon occurs during system operation, the arc monitoring module 6 quickly issues an arc monitoring action and transmits it to the STM32F103 processor 13 through the high-voltage interface circuit 4 to perform a series of arc processing actions to protect the high-frequency high-voltage generator 101;

[0052] Among them, the 500kV high-frequency and high-voltage power supply device uses arc recognition processing technology to automatically monitor the system. When an arc occurs in the system, what needs to be identified here is that the generated arc is divided into strong arc and weak arc. When the arc is a weak arc, the arc monitoring module 6 does not issue a shutdown command. Instead, it is controlled by a tube current closed-loop control circuit. When the weak arc discharge stops, the STM32F103 processor 13 immediately performs a gradient boost. At this time, the high-frequency and high-voltage generator 101 does not stop working. When the arc is a strong arc, the arc monitoring module quickly issues a shutdown command. After the strong arc discharge stops, the high-frequency and high-voltage generator 101 stops working, thereby achieving the effect of protecting the high-frequency and high-voltage generator 101 and protecting the ray tube. At this time, the human-computer communication module needs to resend the operation command.

[0053] like Figure 3 As shown, a high-frequency and high-voltage power supply device for 500kV, whose arc monitoring module 6 and control principle are as follows: the pipe flow sampling interface AR1 of the arc monitoring module 6 is connected to the seventh monitoring capacitor 301, the seventh monitoring capacitor 301 is connected to the third arc sampling resistor 307, and the seventh monitoring capacitor 301 is connected to the fifth unidirectional diode 302, the fifth unidirectional diode 302 is connected to the first current limiting resistor 303, the other end of the first current limiting resistor 303 is connected to the No. 5 input interface of the first B chip 305 with model AD822, and the fourth proportional resistor 304 and the fifth proportional resistor 306 are connected to the No. 6 input interface of the first B chip 305 with model AD822. The input interface, the output interface No. 7 CT1 of the first chip No. B 305 with model AD822 is connected to the high-voltage drive circuit 8 and the filament drive circuit 12. When the system is powered on, when a strong arc problem occurs, the tube current signal AR1 responded by the system will change in a step manner. Since the capacitor has the characteristic of passing alternating current, the seventh monitoring capacitor 301 will recognize the arc signal. When this signal is higher than the comparison signal set by the system, it will respond quickly through the output interface No. 7 CT1 of the first chip No. B 305 with model AD822, and directly shut down the high-voltage drive module 8 and the filament drive module 12, thereby achieving the effect of strong arc protection of the high-voltage generator and the X-ray tube.

[0054] like Figure 4As shown, a high-frequency high-voltage power supply device for 500kV, the high-voltage circuit and the filament circuit principle are as follows: the first step-up transformer 401 of the high-frequency high-voltage generator 101 is connected to the second high-voltage capacitor 402 of model FHV and the ninth high-voltage capacitor 404, the second high-voltage capacitor 402 of model FHV and the third high-voltage silicon stack 403 of model ESJC37 form the first-stage voltage doubler rectifier circuit of the anode, according to the anode high voltage level required by the system, the corresponding number of voltage doubler rectifier circuits are connected in series to realize the output of the anode high voltage, the high-frequency high-voltage generator 101 adopts the ninth high-voltage capacitor 404 of model FHV and The eighth high-voltage silicon stack 405 model is ESJC37, which constitutes the first-stage voltage-doubling rectifier circuit of the cathode. According to the cathode high-voltage level required by the system, the corresponding number of voltage-doubling rectifier circuits are connected in series to realize the output of the cathode high voltage. The cathode and anode of the high-voltage output interface are respectively connected to the high-voltage output ends of the voltage-doubling rectifier circuit, thereby realizing the high-voltage system of the high-frequency high-voltage generator 101. At the same time, the second filament transformer 406 of the high-frequency high-voltage generator 101 is connected to the third filament transformer 407 to form a filament conversion circuit. The output interface of the third transformer 407 is connected to the cathode high-frequency high-voltage generator 101 for powering the filament of the X-ray tube.

[0055] like Figure 5 As shown, a high-frequency high-voltage power supply device for 500kV, the high-voltage driving and filament driving principles are as follows: when the system is running, the interface PB15 of the STM32F103 processor 13 sends a high-voltage driving signal, the interface PB15 is connected to the interface No. 3 of the third chip No. A 501 of model LM2903, the output interface No. 1 of the third chip No. A 501 is connected to the high-voltage driving circuit, the interface PB14 of the STM32F103 processor 13 sends a filament driving signal, the interface PB14 is connected to the interface No. 5 of the third chip No. B 502 of model LM2903, and the output interface No. 7 of the third chip No. B 502 is connected to the filament driving circuit.

[0056] like Figure 6As shown, a high-frequency high-voltage power supply device for 500kV, whose tube current closed-loop control principle is as follows: when the system is running, the interface PA12 of the STM32F103 processor 13 sends a tube current setting signal, the interface PA12 is connected to the No. 3 input port of the first A-number chip 602 with model AD822, the tube current sampling signal AR1 is connected to the twelfth monitoring capacitor 605 and the thirteenth sampling capacitor 606, the current sampling signal AR1 is connected to the sixth current limiting resistor 601, the other end of the sixth current limiting resistor 601 is connected to the No. 2 interface of the first A-number chip 602 with model AD822, and the eleventh integrating capacitor 603 is connected to the No. 2 interface of the first A-number chip 62 with model AD822, the other end of the eleventh integrating capacitor 603 is connected to the seventh proportional resistor 604, and the other end of the seventh proportional resistor 604 is connected to the No. 1 input port of the first A-number chip 602 with model AD822. The output interface, the eleventh integrating capacitor 603 and the seventh proportional resistor 604 constitute a tube current closed-loop control to adjust the size of the tube current. This current signal is identified via the interface PA11 of the STM32F103 processor 13. When the system operates normally, the tube current setting signal PA12 and the tube current sampling signal AR1 are transmitted via the sixth resistor 601 and the first A-number control chip of model AD822, as well as the eleventh integrating capacitor 603 and the seventh proportional resistor 604. The system performs tube current closed-loop stable operation: when a weak arc occurs in the system, the twelfth monitoring capacitor 605 receives the step signal and sends it to the interface PA11 of the STM32F103 processor 13 via the tube current closed-loop control adjustment circuit. The STM32F103 processor 13 makes a corresponding voltage reduction response. After the weak arc ends, the STM32F103 processor 13 makes a corresponding voltage boost response. At this time, the system is in operation.

[0057] A high-frequency and high-voltage power supply device for 500kV, wherein interfaces PA3, PA4 and PA5 of an STM32F103 processor 13 are connected to an interface control circuit 15, and interfaces PB0, PB1 and PB2 of the STM32F103 processor 13 are connected to a signal acquisition circuit 16, so as to detect a peripheral temperature signal output port of a circulating heat dissipation in real time, read the temperature and flow of the system in time, and then transmit the signal to the outside through a human-machine communication module 17. When the signal acquisition circuit finds that the read temperature or flow is faulty or fails to read the temperature data or flow data sent by the periphery within 0.5 seconds, it is determined that the cooling and heat dissipation circulation system is faulty, and the radiation source is immediately shut down to protect the device.

[0058] A high-frequency high-voltage power supply device for 500kV, which uses high-voltage voltage-doubling modular casting technology and filament conversion modular casting technology to simultaneously inject 45# transformer oil insulation medium, and ensures reliable insulation of the high-voltage system through the dual insulation technology of overall modular casting insulation and transformer oil medium insulation; the use of this technology can not only improve reliable insulation, but also ensure that a high-level tube voltage of 500kV can be delivered without changing the volume;

[0059] Among them, the high-voltage insulation of this device adopts the voltage doubler module casting technology, and the voltage doubler module is integrally cast with insulating polyurethane material to further improve its insulation level;

[0060] Among them, the high-voltage insulation of this device adopts the filament module casting technology, and the filament module is integrally cast with insulating polyurethane material to further improve its insulation level;

[0061] Among them, the highly stable No. 45 transformer oil is injected into the high-voltage generator as the insulating medium to ensure the reliable insulation of the 500kV high-voltage system;

[0062] The control circuit adopts a full-bridge circuit with high stable output and pre-stage boost voltage regulation; the high-frequency high-voltage generator 101 adopts a multi-voltage rectifier circuit with low output ripple;

[0063] Among them, the filament loading and high-voltage control technical means adopt filament closed-loop control technology, tube pressure closed-loop control technology, and double closed-loop controller technology to ensure the stable operation of the system's tube pressure and tube flow.

[0064] The control working principle of this device: This patent is a high-frequency and high-voltage power supply device for 500kV, which adopts a 40kHz high-frequency generator with a voltage doubling and rectifying current function, with a maximum output power of 5KW. The power conversion adopts AC380V alternating current power input, which is adjusted to a 0-600V adjustable direct current power supply by a boost circuit, and finally chopped into 40kHz high-frequency alternating current by a full-bridge inverter circuit to drive the high-frequency and high-voltage generator 101. The filament driving circuit adopts a direct 48V direct current power input and a digital current closed loop, and is chopped into 20kHz alternating current to drive the high-voltage filament transformer by a half-bridge. The addition of an arc detection module to the high-frequency and high-voltage generator 101 can effectively ensure the stable operation of the high-frequency and high-voltage generator 101 at a high voltage level of 500kV. Regardless of whether a strong arc or a weak arc occurs, corresponding response actions can be made, thereby enabling the 500kV high-frequency and high-voltage power supply device to operate continuously and stably. In terms of control technology, the dual closed-loop control technology of tube pressure feedback and tube current feedback is adopted, and in terms of insulation, the dual insulation method of casting and No. 45 transformer oil is adopted to ensure the stable and efficient operation of the radiation source generator.

[0065] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, directly or indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A high-frequency high-voltage power supply device for 500kV, characterized in that: include: High frequency and high voltage controller and high frequency and high voltage generator; Among them, the high-frequency high-voltage generator includes: high-voltage output interface, filament conversion module, high-voltage voltage multiplier module, high-voltage interface circuit, feedback module, arc monitoring module, protection module; the high-frequency high-voltage controller includes: STM32F103 processor, high-voltage drive module, protection circuit, power supply circuit, tube voltage closed-loop control circuit, filament drive module, tube current closed-loop control circuit, control interface circuit, signal acquisition circuit, human-computer communication module; Among them, the interface PB15 of the STM32F103 processor is connected to the high-voltage drive module, the interface PB14 of the STM32F103 processor is connected to the filament drive module, the interface PA12 of the STM32F103 processor is connected to the power supply circuit, the high-voltage drive module and the filament drive module are respectively connected to the high-voltage interface circuit, the high-voltage interface circuit is respectively connected to the filament conversion module and the high-voltage voltage doubling module, the high-voltage interface circuit is respectively connected to the signal feedback module, the arc monitoring module and the protection module, the filament conversion module and the high-voltage voltage doubling module are simultaneously connected to the high-voltage output interface, the interface PB14 of the STM32F103 processor is connected to the tube flow closed-loop control circuit, the STM32F The interface PB10 of the STM32F103 processor is connected to the protection circuit, the interface PB12 of the STM32F103 processor is connected to the interface sending end of the human-machine communication module, the interface PB13 of the STM32F103 processor is connected to the interface receiving end of the human-machine communication module, the interfaces PB0, PB1 and PB2 of the STM32F103 processor are connected to the output interface of the signal acquisition circuit, the interfaces PA3, PA4 and PA5 of the central processing unit are connected to the control interface circuit, the interface PB10 of the central processing unit is connected to the protection circuit, and the interfaces PA15 and PB5 of the STM32F103 processor are connected to the pipe pressure closed-loop controller circuit (11).

2. A 500 kV high-frequency high-voltage power supply device according to claim 1, characterized in that: The STM32F103 processor is used as the control core. The control core of the device also includes a filament drive module, a high-voltage drive module, a signal acquisition circuit, a tube current closed-loop control circuit and a tube voltage closed-loop control circuit; the STM32F103 processor is connected with a human-computer communication module, a power supply circuit, a protection circuit and a control interface circuit.

3. A 500 kV high-frequency high-voltage power supply device according to claim 1, characterized in that: A high-voltage voltage doubling module is used as the high-voltage core. The high-voltage core of the device also includes a filament conversion module, a signal feedback module, a protection module, a high-voltage interface circuit and a high-voltage output interface. The high-voltage interface circuit of the high-frequency high-voltage generator is connected to the high-voltage drive module and the filament drive module of the high-frequency high-voltage controller. At the same time, the high-voltage interface circuit is connected to the high-voltage voltage doubling module and the filament conversion module. The high-voltage voltage doubling module is connected to the high-voltage output interface, the filament conversion module is connected to the high-voltage output interface, and the high-voltage interface circuit of the high-frequency high-voltage generator is connected to the arc monitoring module.

4. A 500 kV high-frequency high-voltage power supply device according to claim 1, characterized in that: The device adopts double insulation technology of integral module casting insulation and No. 45 transformer oil insulation protection to ensure reliable insulation of the high-voltage system; the high-voltage insulation of the device adopts voltage doubler module casting technology, and the voltage doubler module is cast as a whole with insulating polyurethane material to further improve its insulation level; the high-voltage insulation of the device adopts filament module casting technology, and the filament module is cast as a whole with insulating polyurethane material to further improve its insulation level; the highly insulating No. 45 transformer oil is injected into the high-frequency high-voltage generator as the insulating medium to ensure reliable insulation of the high-voltage system.

5. A 500 kV high-frequency high-voltage power supply device according to claim 1, characterized in that: in, The control circuit adopts a full-bridge circuit with high-stable output and pre-stage boost voltage regulation; the high-frequency high-voltage generator adopts a multi-voltage rectifier circuit with low output ripple.

6. A 500 kV high-frequency high-voltage power supply device according to claim 1, characterized in that: Among them, the filament loading and high-voltage control technical means adopt filament closed-loop control technology, tube pressure closed-loop control technology, and double closed-loop controller technology to ensure the stable operation of the system's tube pressure and tube flow.

7. A 500kV high-frequency high-voltage power supply device according to claim 1, characterized in that: Interfaces PA3, PA4 and PA5 of the STM32F103 processor are connected to the interface control circuit, and interfaces PB0, PB1 and PB2 of the STM32F103 processor are connected to the signal acquisition circuit to detect the peripheral temperature signal output port of the circulating heat dissipation in real time, read the temperature and flow of the system in time, and then transmit the signal to the outside through the human-computer communication module.

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