Test circuit and test system of high-voltage power supply

Abstract

The utility model discloses a test circuit and a test system of a high-voltage power supply. The test circuit comprises a processor; the power supply module comprises a plurality of high-voltage power supply modules; the input end of the control circuit is connected with the processor, the output end of the control circuit is connected with the controlled end of the power supply module, and the control circuit is used for receiving an enable control signal of the processor and sending an enable signal to the power supply module so as to conduct one of the plurality of high-voltage power supply modules; the high-voltage power supply module is also used for receiving the voltage control signal of the processor and outputting a programming voltage signal to enable the high-voltage power supply module to output charging voltage; the detection circuit is used for detecting the charging voltage of the high-voltage power supply module, outputting a voltage detection signal to the processor and detecting open circuit and short circuit protection of the power supply module; the charging and discharging circuit is used for receiving the charging voltage for charging based on the control of the processor and discharging to provide energy for laser emission; and the high-voltage power supply module can be efficiently and quickly tested.

Description

Technical Field

[0001] This utility model relates to the field of power supply testing technology, and in particular to a test circuit and test system for a high-voltage power supply. Background Technology

[0002] High-voltage controllable power supply modules are crucial energy sources for laser emission. Laser generation is based on stimulated emission, where excited atoms, under the influence of an external radiation field, transition to a lower energy state and emit light. In this process, the high-voltage power supply module, as the energy provider for the external radiation field, is vital for laser output. This module can output a controllable power supply ranging from low to high voltage (to generate sufficient intensity to excite light-emitting atoms). However, current performance and specification testing of high-voltage power supply modules requires manual platform setup and intervention, lacking a fast and reliable system. This problem is particularly pronounced during large-scale testing, making it difficult to efficiently and quickly test the performance of high-voltage power supply modules. Utility Model Content

[0003] The main purpose of this invention is to propose a test circuit and test system for high-voltage power supplies, aiming to solve the problem of low testing efficiency of high-voltage power supply modules in the prior art.

[0004] To achieve the above objectives, the present invention proposes a high-voltage power supply test circuit, comprising:

[0005] processor;

[0006] A power module includes a power output terminal and multiple high-voltage power modules respectively connected to the power output terminal;

[0007] A control circuit is included, wherein its input terminal is communicatively connected to the processor, and its output terminal is connected to the controlled terminal of the power module. The control circuit is used to receive an enable control signal from the processor and send an enable signal to the power module so that one of the multiple high-voltage power modules outputs a charging voltage to the power output terminal; it is also used to receive a voltage control signal from the processor and output a programming voltage signal to the activated high-voltage power module to adjust the magnitude of the charging voltage output by the high-voltage power module accordingly.

[0008] A charging and discharging circuit, wherein the input terminal of the charging and discharging circuit is connected to the power output terminal of the power module, and the controlled terminal of the charging and discharging circuit is connected to the processor, and the charging and discharging circuit is used to receive the charging voltage for charging and discharging based on the control of the processor;

[0009] A detection circuit, an input end of the detection circuit is connected with the power output end of the power module and the charging and discharging circuit respectively, an output end of the detection circuit is connected with the processor, for detecting the charging voltage and discharging voltage in the charging and discharging process of the charging and discharging circuit, and feeding back a voltage detection signal to the processor, so as to test the charging and discharging performance of the high-voltage power module.

[0010] In an embodiment, the control circuit comprises:

[0011] An enabling circuit, the input end of the enabling circuit is connected with the output end, the input end of the enabling circuit is connected with the processor in communication, the multiple output ends of the enabling circuit are respectively connected with the enabling ends of the multiple high-voltage power modules in one-to-one correspondence, the enabling circuit is used for receiving the enabling control signal of the processor and sending the enabling signal to the corresponding high-voltage power module, so as to make one of the multiple high-voltage power modules conductive;

[0012] A DAC control circuit, the input end of the DAC control circuit is connected with the processor in communication, the output end of the DAC control circuit is connected with the controlled end of the power module, the DAC control circuit is used for receiving the voltage control signal of the processor and outputting the programming voltage signal to the high-voltage power module in conduction, so as to make the high-voltage power module output the corresponding charging voltage.

[0013] In an embodiment, the power module includes eight high-voltage power modules, the enable circuit includes eight bus transceivers, a first capacitor, a second capacitor, a first pull-up resistor, a second pull-up resistor, a third pull-up resistor, a fourth pull-up resistor, a fifth pull-up resistor, a sixth pull-up resistor, a seventh pull-up resistor, an eighth pull-up resistor, a first input resistor, a second input resistor, a third input resistor, a fourth input resistor, a fifth input resistor, a sixth input resistor, a seventh input resistor, an eighth input resistor, a first output resistor, a second output resistor, a third output resistor, a fourth output resistor, a fifth output resistor, a sixth output resistor, a seventh output resistor, an eighth output resistor, a first recovery fuse; a first end of the first input resistor to an eighth end of the eighth input resistor are respectively connected to a first enable control end of the processor to an eighth enable control end of the processor one by one, a first end of the first pull-up resistor to an eighth end of the eighth pull-up resistor are interconnected with a second power supply end, a first input end of the eight bus transceivers to an eighth input end of the eight bus transceivers are respectively interconnected with a second end of the first input resistor to a second end of the eighth input resistor and a second end of the first pull-up resistor to a second end of the eighth pull-up resistor, a first output end of the eight bus transceivers to an eighth output end of the eight bus transceivers are respectively connected to a first end of the first output resistor to a first end of the eighth output resistor one by one, a second end of the first output resistor to a second end of the eighth output resistor are respectively connected to an enable end of the eight high-voltage power modules one by one, a first power supply end of the eight bus transceivers is interconnected with a first end of the first capacitor and a first end of the first recovery fuse, a second end of the first capacitor is grounded, a second end of the first recovery fuse is connected to a first power supply end, a ground end of the eight bus transceivers is grounded.

[0014] In an embodiment, the DAC control circuit comprises a first operational amplifier, a second operational amplifier, a first magnetic bead, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor and a first diode; a first end of the first magnetic bead is an input end of the DAC control circuit, a second end of the first magnetic bead is connected with a first end of the first resistor, a second end of the first resistor is interconnected with a first end of the third resistor, a first end of the fourth capacitor and a positive input end of the first operational amplifier, a second end of the third resistor is interconnected with a second end of the fourth capacitor and a first end of the fourth resistor and grounded, a second end of the fourth resistor is interconnected with a first end of the fifth resistor, a first end of the sixth capacitor and a negative input end of the first operational amplifier, a positive power supply end of the first operational amplifier is interconnected with a first end of the third capacitor and a third power supply end, a second end of the third capacitor is grounded, a negative power supply end of the first operational amplifier is grounded, an output end of the first operational amplifier is interconnected with a second end of the fifth resistor, a second end of the sixth capacitor and a first end of the second resistor, a second end of the second resistor is interconnected with a first end of the fifth capacitor, a positive electrode of the first diode and a positive input end of the second operational amplifier, a second end of the fifth capacitor is connected with a negative electrode of the first diode and grounded, a positive power supply end of the second operational amplifier is connected with the third power supply end, a negative power supply end of the second operational amplifier is grounded, an output end of the second operational amplifier is connected with a negative input end of the second operational amplifier, and an input end of the second operational amplifier is an output end of the DAC control circuit.

[0015] In an embodiment, the detection circuit comprises:

[0016] an ADC detection circuit, an input end of the ADC detection circuit is connected with a power output end of the power module and interconnected with an input end of the charging and discharging circuit, and an output end of the ADC detection circuit is connected with the processor, for detecting an operating voltage of the power module and outputting a voltage detection signal to the processor.

[0017] In an embodiment, the ADC detection circuit comprises: a second magnetic bead, a second diode, a first rectifier diode, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, and a third operational amplifier; a first end of the second magnetic bead is an input end of the ADC detection circuit, a positive electrode of the second diode is connected with the first end of the second magnetic bead, a negative electrode of the second diode is grounded, a second end of the second magnetic bead is connected with a first end of the sixth resistor, a second end of the sixth resistor is interconnected with a first end of the seventh resistor, a first end of the seventh capacitor, and a positive input end of the third operational amplifier, a second end of the seventh resistor is interconnected with a second end of the seventh capacitor and a first end of the eighth resistor and grounded, a second end of the eighth resistor is interconnected with a first end of the ninth resistor, a first end of the eighth capacitor, and a negative input end of the third operational amplifier, a positive power supply end of the third operational amplifier is interconnected with a first end of the ninth capacitor and a third power supply end, a second end of the ninth capacitor is grounded, a negative power supply end of the third operational amplifier is grounded, an output end of the third operational amplifier is interconnected with a second end of the ninth resistor, a second end of the eighth capacitor, and a first end of the tenth resistor, a second end of the tenth resistor is interconnected with a first end of the tenth capacitor, a first end of the eleventh resistor, and a first end of the twelfth resistor, a second end of the tenth capacitor is interconnected with a second end of the eleventh resistor and a second end of the eleventh resistor, a second end of the twelfth resistor is interconnected with a first end of the eleventh capacitor and a third end of the first rectifier diode, a second end of the first rectifier diode is connected with the second power supply end, and a first end of the first rectifier diode is grounded.

[0018] In an embodiment, the charging and discharging circuit comprises:

[0019] The capacitor control contactor circuit is connected with the power output end of the power module, the controlled end of the capacitor control contactor circuit is connected with the processor, and the capacitor control contactor circuit is used for turning on or turning off the circuit connection between the output end and the input end under the control of the processor.

[0020] The capacitor control contactor circuit is connected with the power output end of the power module, the controlled end of the capacitor control contactor circuit is connected with the processor, and the capacitor control contactor circuit is used for turning on or turning off the circuit connection between the output end and the input end under the control of the processor.

[0021] a charging capacitor, a first end of the charging capacitor being connected with an output end of the capacitor control contactor circuit, for receiving a charging voltage output by the power module to charge when the capacitor control contactor circuit is turned on;

[0022] a MOS control contactor circuit, an input end of the MOS control contactor circuit being connected with a second end of the charging capacitor, a controlled end of the MOS control contactor circuit being connected with the processor, the MOS control contactor circuit being used for turning on or off the circuit connection between the output end and the input end under the control of the processor;

[0023] a discharging resistor, an input end of the discharging resistor being connected with an output end of the MOS control contactor circuit, the discharging resistor being used for discharging the charging capacitor when the MOS control contactor circuit is turned on.

[0024] In an embodiment, the detection circuit further comprises:

[0025] an error and full detection circuit, an input end of the error and full detection circuit being interconnected with a power output end of the power module and an input end of the charging and discharging circuit, an output end of the error and full detection circuit being connected with the processor, the error and full detection circuit being used for detecting the voltage of the charging capacitor and outputting a full detection signal to the processor when the charging capacitor is full.

[0026] In an embodiment, the detection circuit further comprises:

[0027] an open circuit and short circuit detection circuit, an input end of the open circuit and short circuit detection circuit being connected with an output end of the MOS control contactor circuit, an output end of the open circuit and short circuit detection circuit being connected with the processor, the open circuit and short circuit detection circuit being used for detecting the voltage of the output end of the MOS control contactor circuit and outputting an on-off detection signal to the processor when the MOS control contactor circuit is turned on under the control of the processor.

[0028] The utility model further provides a kind of test system of high voltage power supply, the test system of high voltage power supply includes power supply circuit, host computer and the test circuit of high voltage power supply as any one described above, the power supply circuit is electrically connected with the test circuit of high voltage power supply, the test circuit of high voltage power supply is connected with the host computer.

[0029] The test circuit of the high-voltage power supply can simultaneously connect multiple high-voltage power supply modules, selectively turn on one of the high-voltage power supply modules through a control circuit, and test the turned-on high-voltage power supply module through the control circuit, the detection circuit and the charging and discharging circuit based on the control of a processor, so that the test efficiency can be significantly improved when a large number of tests are performed, and the whole test process can be coordinated, manual intervention is reduced, and the test efficiency is improved. Therefore, the technical scheme of the utility model solves the problem of low test efficiency of the high-voltage power supply module in the prior art, can efficiently and quickly test the performance and index of multiple high-voltage power supply modules, and meets the large-scale and high-efficiency high-voltage power supply module test demand. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained from the structures shown in the drawings without creative labor for those skilled in the art.

[0031] Figure 1 The module structure schematic view of the first embodiment of the test circuit of the high-voltage power supply provided by the utility model is shown in the figure.

[0032] Figure 2 The module structure schematic view of the second embodiment of the test circuit of the high-voltage power supply provided by the utility model is shown in the figure.

[0033] Figure 3 The circuit structure schematic view of the enablement circuit of the second embodiment of the test circuit of the high-voltage power supply provided by the utility model is shown in the figure.

[0034] Figure 4 The circuit structure schematic view of the DAC control circuit of the second embodiment of the test circuit of the high-voltage power supply provided by the utility model is shown in the figure.

[0035] Figure 5 The circuit structure schematic view of the ADC detection circuit of the third embodiment of the test circuit of the high-voltage power supply provided by the utility model is shown in the figure.

[0036] Figure 6 The circuit structure schematic view of the capacitor control contactor circuit of the third embodiment of the test circuit of the high-voltage power supply provided by the utility model is shown in the figure.

[0037] Figure 7 The circuit structure schematic view of the MOS control contactor circuit of the third embodiment of the test circuit of the high-voltage power supply provided by the utility model is shown in the figure.

[0038] Figure 8The module structure schematic diagram of the test system of the high-voltage power supply is provided.

[0039] BRIEF DESCRIPTION OF DRAWINGS

[0040] 10, processor; 20, control circuit; 21, enable circuit; C43, first capacitor; C44, second capacitor; V5D, first power supply end; V3.3D, second power supply end; U8, eight-way bus transceiver; F1, first recovery fuse; R302-R309, first pull-up resistor to eighth pull-up resistor; R50, first output resistor; R52, second output resistor; R54, third output resistor; R56, fourth output resistor; R58, fifth output resistor; R60, sixth output resistor; R62, seventh output resistor; R64, eighth output resistor; R51, first input resistor; R53, second input resistor; R55, third input resistor; R57, fourth input resistor; R59, fifth input resistor; R61, sixth input resistor; R63, seventh input resistor; R65, eighth input resistor; 22, DAC control circuit; U9A, first operational amplifier; U9B, second operational amplifier; FB1, first magnetic bead; R66-R70, first resistor to fifth resistor; C46-C49, third capacitor to sixth capacitor; D39, first diode; 30, detection circuit; 31, ADC detection circuit; U31A, third operational amplifier; FB7, second magnetic bead; R173, sixth resistor; R179, seventh resistor; R182, eighth resistor; R185, ninth resistor; R177, tenth resistor; R183, eleventh resistor; R178, twelfth resistor; C70, seventh capacitor; C76, eighth capacitor; C109, ninth capacitor; C74, tenth capacitor; C75, eleventh capacitor; D85, second diode; Q18, first rectifier diode; V12A, third power supply end; 32, error and full detection circuit; 33, open circuit and short circuit detection circuit; 40, power module; 50, charge and discharge circuit; 51, capacitor control contactor circuit; 52, charging capacitor; 53, MOS control contactor circuit; 54, discharge resistor.

[0041] 100, power supply circuit; 200, upper computer; 300, test circuit of high-voltage power supply.

[0042] The realization, functional features and advantages of the utility model will be further explained in combination with embodiments and with reference to the drawings. DETAILED DESCRIPTION

[0043] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0044] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture, and if the specific posture changes, the directional indications will also change accordingly.

[0045] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel solutions are included, for example, "A and / or B" includes A solution, or B solution, or A and B solutions. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears to be contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0046] The high-voltage controllable power module is an important energy source for laser emission. The generation of laser is based on the principle of stimulated radiation, that is, the light-emitting atom in the excited state is affected by the external radiation field, and jumps to the low-energy state and radiates light. In this process, the high-voltage power module as an energy provider of the external radiation field is crucial to the output of the laser. The power module can output controllable power from low voltage to high voltage (to generate a radiation excited light atom with sufficient intensity). However, at present, the performance and index test of the high-voltage power module needs to be manually built by artificial intervention test, and lacks a fast and reliable system. Especially in large quantities of testing, this problem is particularly prominent, and it is difficult to efficiently and quickly test the performance of the high-voltage power module.

[0047] Based on this, the utility model provides a kind of test circuit 300 of high voltage power supply.

[0048] Please refer to Figure 1 In the first embodiment of the present application, the test circuit 300 of the high voltage power supply includes:

[0049] a processor 10;

[0050] a power module 40, comprising a power output end and a plurality of high-voltage power modules connected with the power output end respectively;

[0051] a control circuit 20, an input end of the control circuit 20 being connected with the processor 10 in communication, an output end of the control circuit 20 being connected with a controlled end of the power module 40, the control circuit 20 being used for receiving an enable control signal of the processor 10 and sending an enable signal to the power module 40, so that one of the plurality of high-voltage power modules outputs a charging voltage to the power output end, and being further used for receiving a voltage control signal of the processor 10 and outputting a programming voltage signal to the high-voltage power module in conduction, so as to correspondingly adjust the size of the charging voltage output by the high-voltage power module;

[0052] a charging and discharging circuit 50, an input end of the charging and discharging circuit 50 being connected with the power output end of the power module 40, a controlled end of the charging and discharging circuit 50 being connected with the processor 10, the charging and discharging circuit 50 being used for receiving the charging voltage for charging and discharging based on the control of the processor 10;

[0053] a detection circuit 30, an input end of the detection circuit 30 being connected with the power output end of the power module 40 and the charging and discharging circuit 50 respectively, an output end of the detection circuit 30 being connected with the processor 10, the detection circuit 30 being used for detecting the charging voltage and the discharging voltage in the charging and discharging process of the charging and discharging circuit 50 and feeding back a voltage detection signal to the processor 10, so as to test the charging and discharging performance of the high-voltage power module.

[0054] It should be noted that the processor 10 can be selected from a single-chip microcomputer, an MCU and other processing chips, the processor 10 tests each high-voltage power module in the power module 40 through the control circuit 20 and the detection circuit 30, coordinates the entire test process, and reduces manual intervention;

[0055] The control circuit 20 can be a combination of a circuit with an output enable function and a digital-to-analog conversion function, based on the control of the processor 10, the control circuit 20 sends an enable signal to the power module 40 to enable one of the plurality of high-voltage power modules in the power module 40 to output, and provides a corresponding programming voltage for the high-voltage power module in conduction according to the control voltage of the processor 10;

[0056] The detection circuit 30 can be a combination of a circuit with an analog-to-digital conversion function and a circuit with an on-off detection function, the input end of the detection circuit 30 is connected with the power supply output end of the power module 40, for monitoring the charging voltage of the turned-on high-voltage power module in real time, the output end is connected with the processor 10, and the detected voltage signal is fed back to the processor 10 for analysis, in addition, the detection circuit 30 is also responsible for monitoring the open circuit and short circuit protection state of the power module 40, and ensuring the safety of the test process.

[0057] The charge-discharge circuit 50 can be a circuit composed of a capacitor, a resistor and a contact controller, based on the control of the processor 10, the turned-on high-voltage power module in the power module 40 charges the capacitor and then discharges through the resistor, and the voltage condition and the charge-discharge time are detected in real time to evaluate the charging performance and the discharging performance of the power module 40.

[0058] The test circuit 300 of the high-voltage power supply of the utility model can connect multiple high-voltage power modules at the same time, selectively turn on one of them through the control circuit 20, and then test the turned-on high-voltage power module through the control circuit 20, the detection circuit 30 and the charge-discharge circuit 50 based on the control of the processor 10, so that the test efficiency can be significantly improved when a large number of tests are carried out, and the whole test process can be coordinated, manual intervention is reduced, and the test efficiency is improved. Therefore, the technical scheme of the utility model solves the problem of low test efficiency of the high-voltage power module in the prior art, can efficiently and quickly test the performance and index of multiple high-voltage power modules, and meets the large-scale and high-efficiency high-voltage power module test demand.

[0059] Please refer to Figure 2 In an embodiment of the second embodiment of the utility model, the control circuit 20 comprises:

[0060] The enablement circuit 21 comprises an input end and multiple output ends, the input end of the enablement circuit 21 is in communication connection with the processor 10, the multiple output ends of the enablement circuit 21 are respectively in one-to-one correspondence with the enablement ends of multiple high-voltage power modules, the enablement circuit 21 is used for receiving the enablement control signal of the processor 10 and sending the enablement signal to the corresponding high-voltage power module, so that one of the multiple high-voltage power modules is turned on.

[0061] The DAC control circuit 22, the input end of the DAC control circuit 22 is in communication connection with the processor 10, the output end of the DAC control circuit 22 is connected with the controlled end of the power module 40, and the DAC control circuit 22 is used for receiving the voltage control signal of the processor 10 and outputting the programming voltage signal to the turned-on high-voltage power module to make the high-voltage power module output the corresponding charging voltage.

[0062] It should be noted that the enable circuit 21 can be composed of a multi-channel bus transceiver, a capacitor, a resistor, and a reference voltage source, and has an output enable function. The enable circuit 21 is one of the core parts of the control circuit 20, which is composed of an input end and multiple output ends. The input end is directly connected to the control pin of the processor 10 for receiving the enable control signal from the processor 10. The multiple output ends are respectively connected to the enable ends of each high-voltage power supply module in one-to-one correspondence, ensuring that each high-voltage power supply module can independently receive the enable signal. When the processor 10 decides to start a certain high-voltage power supply module for testing according to the preset logic or external instructions, it sends an enable control signal through the input end of the enable circuit 21. After the internal logic processing of the enable circuit 21, the signal is converted into the corresponding enable signal and sent to the enable end of the target high-voltage power supply module through the corresponding output end, so that only the module is turned on and the other modules remain in the off state.

[0063] The DAC control circuit 22 can be a circuit with digital-to-analog conversion function composed of a digital-to-analog converter, an operational amplifier, a capacitor, a resistor, etc. The DAC control circuit 22 also receives signals from the processor 10, but its input end receives a voltage control signal instead of an enable signal. The output end of the DAC control circuit 22 is connected to the controlled end (such as the voltage regulation pin) of the high-voltage power supply module currently enabled (i.e., turned on). When a certain high-voltage power supply module is activated and turned on by the enable circuit 21, the processor 10 will output the corresponding voltage control signal through the input end of the DAC control circuit 22 according to the required charging voltage value. After receiving the signal, the DAC control circuit 22 converts it into an analog programming voltage signal and outputs it to the controlled end of the currently turned-on high-voltage power supply module. The programming voltage signal guides the high-voltage power supply module to adjust its output voltage to accurately match the required charging voltage value. This mechanism ensures the accuracy and flexibility of the charging process.

[0064] In this embodiment, the control circuit 20 realizes accurate control of multiple high-voltage power supply modules by skillfully combining the enable circuit 21 and the DAC control circuit 22. The enable circuit 21 ensures that when a large number of tests are performed, one of the multiple high-voltage power supply modules selected for testing can be completed without manual intervention, and then the tests of multiple high-voltage power supply modules are completed one by one. The DAC control circuit 22 is responsible for adjusting the output voltage according to the actual demand. The two work together to realize accurate control of each high-voltage power supply module, improving the efficiency and accuracy of the test.

[0065] Please refer to Figure 3In an embodiment of the second embodiment of the utility model, the power module 40 includes eight high-voltage power modules, the enablement circuit 21 includes eight bus transceivers U8, a first capacitor C43, a second capacitor C44, a first pull-up resistor R302, a second pull-up resistor R303, a third pull-up resistor R304, a fourth pull-up resistor R305, a fifth pull-up resistor R306, a sixth pull-up resistor R307, a seventh pull-up resistor R308, an eighth pull-up resistor R309, a first input resistor R51, a second input resistor R53, a third input resistor R55, a fourth input resistor R57, a fifth input resistor R59, a sixth input resistor R61, a seventh input resistor R63, an eighth input resistor R65, a first output resistor R50, a second output resistor R52, a third output resistor R54, a fourth output resistor R56, a fifth output resistor R58, a sixth output resistor R60, a seventh output resistor R62, an eighth output resistor R64, a first recovery fuse F1, the first end of the first input resistor R51 to the first end of the eighth input resistor R65 are connected with the first enablement control end of the processor 10 to the eighth enablement control end of the processor 10 one by one, the first end of the first pull-up resistor R302 to the first end of the eighth pull-up resistor R309 are interconnected with the second power supply end V3.3D, the first input end of the eight bus transceivers U8 to the eighth input end of the eight bus transceivers U8 are interconnected with the second end of the first input resistor R51 to the second end of the eighth input resistor R65 and the second end of the first pull-up resistor R302 to the second end of the eighth pull-up resistor R309, the first output end of the eight bus transceivers U8 to the eighth output end of the eight bus transceivers U8 are connected with the first end of the first output resistor R50 to the first end of the eighth output resistor R64 one by one, the second end of the first output resistor R50 to the second end of the eighth output resistor R64 are connected with the enablement end of the eight high-voltage power modules one by one, the first power supply end of the eight bus transceivers U8 is interconnected with the first end of the first capacitor C43 and the first end of the first recovery fuse F1, the second end of the first capacitor C43 is grounded, the second end of the first recovery fuse F1 is connected with the first power supply end V5D, and the grounding end of the eight bus transceivers U8 is grounded.

[0066] It should be noted that in the embodiment, the output enable function of the enable circuit 21 is realized by selecting the eight-way bus transceiver U8, the first to eighth enable control terminals of the processor 10 are EN1-EN8 pins, the first to eighth output terminals of the eight-way bus transceiver U8 are INHIBIT1-INHIBIT8 pins, the 3.3V enable control signals are received by the EN1-EN8 pins of the processor 10, and then the 5V enable signals are output by the INHIBIT1-INHIBIT8 pins of the eight-way bus transceiver U8, so as to control the enable of each high-voltage power supply module in the power supply module 40. When the processor 10 decides to start a certain high-voltage power supply module for testing according to a preset logic or an external instruction, the enable control signal is output at the corresponding pin, is converted into an enable signal by the enable circuit 21, and is output at the corresponding output terminal, so as to control the corresponding high-voltage power supply module to be turned on.

[0067] In addition, in the embodiment, the testing of the 8-way high-voltage power supply module is taken as an example, but in the technical solution of the embodiment, the number of ways can be expanded according to the specific circuit design of the enable circuit 21 and the processor 10, and is not limited to the 8-way testing in the embodiment, and the embodiment does not make a specific limitation.

[0068] Please refer to Figure 4In an embodiment of the second embodiment of the utility model, the DAC control circuit 22 includes first operational amplifier U9A, second operational amplifier U9B, first magnetic bead FB1, first resistance R66, second resistance R67, third resistance R68, fourth resistance R69, fifth resistance R70, third capacitor C46, fourth capacitor C47, fifth capacitor C48, sixth capacitor C49 and first diode D39, the first end of first magnetic bead FB1 is the input of DAC control circuit 22, the second end of first magnetic bead FB1 is connected with the first end of first resistance R66, the second end of first resistance R66 is interconnected with the first end of third resistance R68, the first end of fourth capacitor C47 and the positive input of first operational amplifier U9A, the second end of third resistance R68 is interconnected with the second end of fourth capacitor C47 and the first end of fourth resistance R69 and is grounded, the second end of fourth resistance R69 is interconnected with the first end of fifth resistance R70, the first end of sixth capacitor C49 and the negative input of first operational amplifier U9A, the positive power supply end of first operational amplifier U9A is interconnected with the first end of third capacitor C46 and third power supply end V12A, the second end of third capacitor C46 is grounded, the negative power supply end of first operational amplifier U9A is grounded, the output of first operational amplifier U9A is interconnected with the second end of fifth resistance R70, the second end of sixth capacitor C49 and the first end of second resistance R67, the second end of second resistance R67 is interconnected with the first end of fifth capacitor C48, the anode of first diode D39 and the positive input of second operational amplifier U9B, the second end of fifth capacitor C48 is connected with the cathode of first diode D39 and is grounded, the positive power supply end of second operational amplifier U9B is connected with third power supply end V12A, the negative power supply end of second operational amplifier U9B is grounded, the output of second operational amplifier U9B is connected with the negative input of second operational amplifier U9B, and the input of second operational amplifier U9B is the output of DAC control circuit 22.

[0069] It needs to be explained that the processor 10 outputs a digital-to-analog conversion voltage signal DAC1 (0V~2.94V) to the third pin (the positive power supply end of the first operational amplifier U9A) of U9 through a digital-to-analog converter (not shown in the figure), and after being amplified by 3.4 times (the multiple is 1+R70 / R60=3.4), the second operational amplifier U9B as a follower outputs to the seventh pin (the output end of the second operational amplifier U9B) of U9, so as to control the voltage of a certain high-voltage power supply module of the power supply module 40 by the programming voltage signal. The programming voltage signal output by the digital-to-analog conversion voltage signal DAC1 after amplification ranges from 0 to 10V, and the corresponding control charging voltage range of the high-voltage power supply module is 0~800V. Through this control mode, each high-voltage power supply module in the power supply module 40 is controlled and tested.

[0070] In addition, in the technical scheme of the embodiment, the value of DAC1 output by the processor 10 through the digital-to-analog converter can be adjusted according to the specific model configuration of the high-voltage power supply module, which is suitable for different programming voltage control ratios of different models of high-voltage power supply modules, so that different models of high-voltage power supply modules can be compatible, and the test is not limited to a single type of high-voltage power supply module.

[0071] Please refer to Figure 2 In the third embodiment of the utility model, the detection circuit 30 includes:

[0072] The input end of the ADC detection circuit 31 is connected with the power output end of the power supply module 40 and the input end of the charge-discharge circuit 50 is interconnected, and the output end of the ADC detection circuit 31 is connected with the processor 10, which is used to detect the working voltage of the power supply module 40 and output voltage detection signal to the processor 10.

[0073] It needs to be explained that the ADC detection circuit 31 can be a circuit with analog-to-digital conversion function composed of an analog-to-digital converter, an operational amplifier, a capacitor, a resistor, a diode and the like,

[0074] The input end of the ADC detection circuit 31 is directly connected with the power output end of the power supply module 40, which is used to receive the voltage signal output by the power supply module 40. The main function of the ADC detection circuit 31 is to convert the received analog voltage signal into a digital signal. This conversion process is completed by the internal analog-to-digital converter, which converts the analog voltage signal into a corresponding digital signal. The converted digital signal is sent to the processor 10 through the output end of the ADC detection circuit 31, and the processor 10 can judge the working state of the power supply module 40 according to these signals to evaluate the charge-discharge performance of the power supply module 40.

[0075] Please refer to Figure 5In an embodiment of the third embodiment of the utility model, the ADC detection circuit 31 includes: second magnetic beads FB7, second diode D85, first rectifier diode Q18, seventh capacitor C70, eighth capacitor C76, ninth capacitor C109, tenth capacitor C74, eleventh capacitor C75, sixth resistor R173, seventh resistor R179, eighth resistor R182, ninth resistor R185, tenth resistor R177, eleventh resistor R183, twelfth resistor R178 and third operational amplifier U31A;The first end of second magnetic beads FB7 is the input end of ADC detection circuit 31, the first end of second magnetic beads FB7 is connected with the positive pole of second diode D85, the negative pole of second diode D85 is grounded, the second end of second magnetic beads FB7 is connected with the first end of sixth resistor R173, the second end of sixth resistor R173 is interconnected with the first end of seventh resistor R179, the first end of seventh capacitor C70 and the positive input end of third operational amplifier U31A, the second end of seventh resistor R179 is interconnected with the second end of seventh capacitor C70 and the first end of eighth resistor R182 and is grounded, the second end of eighth resistor R182 is interconnected with the first end of ninth resistor R185, the first end of eighth capacitor C76 and the negative input end of third operational amplifier U31A, the positive power supply end of third operational amplifier U31A is interconnected with the first end of ninth capacitor C109 and third power supply end V12A, the second end of ninth capacitor C109 is grounded, the negative power supply end of third operational amplifier U31A is grounded, the output end of third operational amplifier U31A is interconnected with the second end of ninth resistor R185, the second end of eighth capacitor C76 and the first end of tenth resistor R177, the second end of tenth resistor R177 is interconnected with the first end of tenth capacitor C74, the first end of eleventh resistor R183 and the first end of twelfth resistor R178, the second end of tenth capacitor C74 is interconnected with the second end of eleventh resistor R183 and the second end of eleventh resistor R183, the second end of twelfth resistor R178 is interconnected with the first end of eleventh capacitor C75 and the third end of first rectifier diode Q18, the second end of first rectifier diode Q18 is connected with second power supply end V3.3D, and the first end of first rectifier diode Q18 is grounded.

[0076] It should be noted that the ADC detection circuit 31 is used for monitoring the charging voltage feedback signal of the power module 40, and the 0-800V of the charging voltage corresponds to the Voltage_Feeback1 feedback voltage of 0-10V, which is reduced to 0-2.727V after being divided by R173 and R179, and is output to CV_FB1 through the U31 follower and enters the processor 10. The processor 10 can accurately obtain the voltage on the charging capacitor 52 by monitoring the voltage of CV_FB1 through an analog-to-digital converter (not shown in the figure). (The feedback voltage monitoring mode of the other charging capacitors 52 of the M03 module is the same as the first path).

[0077] Please refer to Figure 2 In the fourth embodiment of the utility model, the charging and discharging circuit 50 comprises

[0078] The capacitor control contactor circuit 51 is connected with the power output end of the power module 40, and the controlled end is connected with the processor 10. The capacitor control contactor circuit 51 is used for controlling the circuit connection between the output end and the input end to be turned on or turned off under the control of the processor 10.

[0079] The charging capacitor 52 is connected with the output end of the capacitor control contactor circuit 51, and is used for receiving the charging voltage output by the power module 40 to charge when the capacitor control contactor circuit 51 is turned on.

[0080] The MOS control contactor circuit is connected with the second end of the charging capacitor 52, and the controlled end is connected with the processor 10. The MOS control contactor circuit is used for controlling the circuit connection between the output end and the input end to be turned on or turned off under the control of the processor 10.

[0081] The discharging resistor 54 is connected with the output end of the MOS control contactor circuit, and is used for discharging the charging capacitor 52 when the MOS control contactor circuit is turned on.

[0082] It should be noted that the input end of the capacitor control contactor circuit 51 is connected with the power output end of the power module 40, and the controlled end is connected with the processor 10. The main function of the circuit is to be controlled by the processor 10, and the circuit connection between the input end and the output end is turned on or turned off. When the processor 10 sends a closing signal, the capacitor control contactor circuit 51 is closed, allowing the power module 40 to output power to the subsequent circuit; when the processor 10 sends an opening signal, the circuit is disconnected, cutting off the power transmission.

[0083] The first end of the charging capacitor 52 is connected with the output end of the capacitor control contactor circuit 51, and the second end is connected with the input end of the MOS control contactor circuit. The charging capacitor 52 receives the charging voltage output by the power module 40 to charge when the capacitor control contactor circuit 51 is turned on. The charging capacitor 52 can store electrical energy and release it when needed.

[0084] The input end of the MOS control contactor circuit is connected with the second end of the charging capacitor 52, and the controlled end is also connected with the processor 10. The circuit is controlled by the processor 10 to realize the conduction or disconnection of the circuit connection between the input end and the output end. Similar to the capacitor control contactor circuit 51, but the MOS control contactor circuit is usually used in more fine control scenarios, such as accurate control of the discharge process. The input end of the discharge resistor 54 is connected with the output end of the MOS control contactor circuit. The discharge resistor 54 discharges the charging capacitor 52 when the MOS control contactor circuit is turned on. The discharge resistor 54 can consume the electrical energy stored in the capacitor and convert it into heat energy to release.

[0085] In an embodiment of the fourth embodiment of the utility model, the circuit structure of the capacitor control contactor circuit 51 is as shown in the figure, and the Relay3 signal transmitted from the processor 10 can control the conduction of the Q27 MOS tube, so as to open the corresponding contactor switch of J49-J56, so that the corresponding high-voltage power module in the power module 40 charges the charging capacitor 52. Figure 6

[0086] In another embodiment of the fourth embodiment of the utility model, the circuit structure of the MOS control contactor circuit is as shown in the figure, and when the discharge of the high-voltage power module in the power module 40 is completed, the processor 10 pulls up the voltage of INHIBIT1 and DischargeResistance, the two signals are output to the low level through the NAND gate U17, the U15 optocoupler is not turned on, the first pin of J8 outputs the high level, so that the external connected discharge MOS (not shown in the figure) is turned on, and then the charging capacitor 52 discharges the discharge resistor 54. Through this control mode, the charging and discharging process of each high-voltage power module in the power module 40 is completed. Figure 7

[0087] In summary, the charging and discharging circuit 50 realizes the accurate control and management of the output electrical energy of the power module 40 through the cooperative work of the capacitor control contactor circuit 51, the charging capacitor 52, the MOS control contactor circuit and the discharge resistor 54 and other components. This design not only improves the flexibility and reliability of the circuit, but also provides strong support for the energy management of electronic equipment.

[0088] Please refer to Figure 2 In an embodiment of the fourth embodiment of the utility model, the detection circuit 30 further comprises: ​​

[0089] The fault and full detection circuit 32 is interconnected with the power output of the power module 40 and the input of the charge-discharge circuit 50, and the output of the fault and full detection circuit 32 is connected with the processor 10, and the fault and full detection circuit 32 is used for detecting the voltage of the charge capacitor 52 and outputting a full detection signal to the processor 10 when the charge capacitor 52 is full.

[0090] It should be noted that the input of the fault and full detection circuit 32 is interconnected with the power output of the power module 40 and the input of the charge-discharge circuit 50, and the output of the fault and full detection circuit 32 is directly connected to the processor 10. The core task of this circuit is to monitor the voltage level of the charge capacitor 52. When the charge capacitor 52 reaches the preset full voltage, the circuit will immediately send a full detection signal to the processor 10. This function is crucial for preventing overcharging, protecting the charge capacitor 52 and ensuring the safety of the power management system. During the charging process, the fault and full detection circuit 32 continuously monitors the voltage of the charge capacitor 52. Once the voltage is detected to reach or exceed the preset full threshold, the circuit will notify the processor 10 to stop charging, thereby preventing potential damage caused by overcharging. And it can detect the state of each high-voltage power module in the power module 40 in real time, and output a fault signal to the processor 10 when the charging voltage is abnormal, and the processor 10 can report an error through the upper computer or the SPI screen to indicate the abnormal high-voltage power module.

[0091] Further, please refer to Figure 2 In another embodiment of the fourth embodiment of the utility model, the detection circuit 30 further comprises:

[0092] The open circuit and short circuit detection circuit 33 is connected with the output of the MOS control contactor circuit, and the output of the open circuit and short circuit detection circuit 33 is connected with the processor 10, and the open circuit and short circuit detection circuit 33 is used for detecting the voltage of the MOS control contactor circuit output and outputting a on-off detection signal to the processor 10 when the MOS control contactor circuit is turned on under the control of the processor 10.

[0093] It should be noted that the input end of the open circuit and short circuit detection circuit 33 is connected with the output end of the MOS control contactor circuit, and the output end thereof is directly connected with the processor 10. The main responsibility of the circuit is to detect the voltage condition of the output end of the MOS control contactor circuit when the MOS control contactor circuit is turned on under the control of the processor 10. The circuit can quickly identify whether the circuit is in an open circuit or a short circuit state, and send an on-off detection signal to the processor 10. In other working stages of the discharge or power management system, the open circuit and short circuit detection circuit 33 continuously monitors the output end of the MOS control contactor circuit. Once an open circuit or a short circuit condition is found, the circuit will immediately send a warning signal to the processor 10, so that the system can take timely measures, such as cutting off the power supply or adjusting the working parameters, to avoid potential circuit damage or safety hazards.

[0094] In the embodiment, the error and full detection circuit 32, the open circuit and short circuit detection circuit 33 and the original ADC detection circuit 31 jointly constitute a more perfect detection system. The processor 10 can understand the working state of the power supply module 40, the charge-discharge circuit 50 and the whole circuit in real time by receiving the signals sent by these circuits, and more accurate testing of each high-voltage power supply module can be performed, and the reliability and stability of the testing circuit are enhanced.

[0095] Please refer to Figure 8 The utility model also proposes a kind of testing system of high voltage power supply, the testing system of high voltage power supply includes power supply circuit 100, host computer 200 and as any one described above high voltage power supply test circuit 300, the power supply circuit 100 is electrically connected with the high voltage power supply test circuit 300, the high voltage power supply test circuit 300 is connected with the host computer 200.

[0096] The specific structure of the high voltage power supply test circuit 300 refers to the above embodiment, since the present testing system adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0097] In an embodiment, the host computer 200 is used to control the high voltage power supply test circuit 300 to perform charge-discharge performance test and / or continuous aging performance test of the power supply module.

[0098] In addition to realizing the control of the test circuit by the host computer 200, man-machine interaction can also be realized by the way of adding SPI (Serial Peripheral Interface) screen to the processor in the high voltage power supply test circuit, to complete the control of the test, which is not limited in the embodiment.

[0099] It should be noted that the charge-discharge performance test is aimed at evaluating the performance of the laser high-voltage power module in the charge-discharge cycle, including key indicators such as voltage stability, current control capability, efficiency, and charge-discharge speed; the continuous aging performance test is aimed at simulating the performance change of the power module under long-time work, so as to evaluate the service life and reliability. These tests can find the performance and reliability problems of the high-voltage power module, and provide a basis for the design optimization of the power module.

[0100] The above only describes exemplary embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A test circuit for a high voltage power supply, characterized by The application relates to a high-voltage power supply module, which comprises the following parts: a processor; a power supply module, which comprises a power supply output end and a plurality of high-voltage power supply modules connected with the power supply output end respectively; a control circuit, the input end of which is connected with the processor in communication, and the output end of which is connected with the controlled end of the power supply module, the control circuit being used for receiving the enable control signal of the processor and sending the enable signal to the power supply module, so that one of the plurality of high-voltage power supply modules outputs a charging voltage to the power supply output end, and being further used for receiving the voltage control signal of the processor and outputting the programming voltage signal to the turned-on high-voltage power supply module, so as to adjust the size of the charging voltage output by the high-voltage power supply module correspondingly; a charging and discharging circuit, the input end of which is connected with the power supply output end of the power supply module, and the controlled end of which is connected with the processor, the charging and discharging circuit being used for receiving the charging voltage based on the control of the processor to charge and discharge; a detection circuit, the input end of which is connected with the power supply output end of the power supply module and the charging and discharging circuit respectively, and the output end of which is connected with the processor, the detection circuit being used for detecting the charging voltage and the discharging voltage in the charging and discharging process of the charging and discharging circuit and feeding back the voltage detection signal to the processor, so as to test the charging and discharging performance of the high-voltage power supply module.

2. The test circuit for a high voltage power supply as recited in claim 1, wherein, The control circuit comprises: an enable circuit, which comprises an input end and a plurality of output ends, the input end of the enable circuit being connected with the processor in communication, and the plurality of output ends of the enable circuit being connected with the enable ends of the plurality of high-voltage power supply modules one by one respectively, the enable circuit being used for receiving the enable control signal of the processor and sending the enable signal to the corresponding high-voltage power supply module, so that one of the plurality of high-voltage power supply modules is turned on; a DAC control circuit, the input end of which is connected with the processor in communication, and the output end of which is connected with the controlled end of the power supply module, the DAC control circuit being used for receiving the voltage control signal of the processor and outputting the programming voltage signal to the turned-on high-voltage power supply module, so that the high-voltage power supply module outputs the corresponding charging voltage.

3. The test circuit for a high voltage power supply of claim 2, wherein, The power module includes eight high-voltage power modules, the enable circuit includes eight bus transceivers, a first capacitor, a second capacitor, a first pull-up resistor, a second pull-up resistor, a third pull-up resistor, a fourth pull-up resistor, a fifth pull-up resistor, a sixth pull-up resistor, a seventh pull-up resistor, an eighth pull-up resistor, a first input resistor, a second input resistor, a third input resistor, a fourth input resistor, a fifth input resistor, a sixth input resistor, a seventh input resistor, an eighth input resistor, a first output resistor, a second output resistor, a third output resistor, a fourth output resistor, a fifth output resistor, a sixth output resistor, a seventh output resistor, an eighth output resistor, a first recovery fuse; the first end of the first input resistor to the first end of the eighth input resistor is connected to the first enable control end of the processor to the eighth enable control end of the processor one by one, the first end of the first pull-up resistor to the first end of the eighth pull-up resistor is interconnected with the second power supply end, the first input end of the eight bus transceivers to the eighth input end of the eight bus transceivers is interconnected with the second end of the first input resistor to the second end of the eighth input resistor and the second end of the first pull-up resistor to the second end of the eighth pull-up resistor, the first output end of the eight bus transceivers to the eighth output end of the eight bus transceivers is connected to the first end of the first output resistor to the first end of the eighth output resistor one by one, the second end of the first output resistor to the second end of the eighth output resistor is connected to the enable end of the eight high-voltage power modules one by one, the first power supply end of the eight bus transceivers is interconnected with the first end of the first capacitor and the first end of the first recovery fuse, the second end of the first capacitor is grounded, the second end of the first recovery fuse is connected to the first power supply end, and the ground end of the eight bus transceivers is grounded.

4. The test circuit for a high voltage power supply of claim 2, wherein, The DAC control circuit comprises a first operational amplifier, a second operational amplifier, a first magnetic bead, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor and a first diode; a first end of the first magnetic bead is an input end of the DAC control circuit, a second end of the first magnetic bead is connected with a first end of the first resistor, a second end of the first resistor is interconnected with a first end of the third resistor, a first end of the fourth capacitor and a positive input end of the first operational amplifier, a second end of the third resistor is interconnected with a second end of the fourth capacitor and a first end of the fourth resistor and grounded, a second end of the fourth resistor is interconnected with a first end of the fifth resistor, a first end of the sixth capacitor and a negative input end of the first operational amplifier, a positive power supply end of the first operational amplifier is interconnected with a first end of the third capacitor and a third power supply end, a second end of the third capacitor is grounded, a negative power supply end of the first operational amplifier is grounded, an output end of the first operational amplifier is interconnected with a second end of the fifth resistor, a second end of the sixth capacitor and a first end of the second resistor, a second end of the second resistor is interconnected with a first end of the fifth capacitor, a positive electrode of the first diode and a positive input end of the second operational amplifier, a second end of the fifth capacitor is connected with a negative electrode of the first diode and grounded, a positive power supply end of the second operational amplifier is connected with the third power supply end, a negative power supply end of the second operational amplifier is grounded, an output end of the second operational amplifier is connected with a negative input end of the second operational amplifier, and an input end of the second operational amplifier is an output end of the DAC control circuit.

5. The test circuit for a high voltage power supply of claim 1, wherein, The detection circuit comprises: An ADC detection circuit, an input end of the ADC detection circuit is connected with a power output end of the power module and interconnected with an input end of the charging and discharging circuit, an output end of the ADC detection circuit is connected with the processor, for detecting a working voltage of the power module and outputting a voltage detection signal to the processor.

6. The test circuit for a high voltage power supply of claim 5, wherein, The ADC detection circuit comprises a second magnetic bead, a second diode, a first rectifier diode, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor and a third operational amplifier; a first end of the second magnetic bead is an input end of the ADC detection circuit, a positive electrode of the second diode is connected with the first end of the second magnetic bead, a negative electrode of the second diode is grounded, a second end of the second magnetic bead is connected with a first end of the sixth resistor, a second end of the sixth resistor is interconnected with a first end of the seventh resistor, a first end of the seventh capacitor and a positive input end of the third operational amplifier, a second end of the seventh resistor is interconnected with a second end of the seventh capacitor and a first end of the eighth resistor and grounded, a second end of the eighth resistor is interconnected with a first end of the ninth resistor, a first end of the eighth capacitor and a negative input end of the third operational amplifier, a positive power supply end of the third operational amplifier is interconnected with a first end of the ninth capacitor and a third power supply end, a second end of the ninth capacitor is grounded, a negative power supply end of the third operational amplifier is grounded, an output end of the third operational amplifier is interconnected with a second end of the ninth resistor, a second end of the eighth capacitor and a first end of the tenth resistor, a second end of the tenth resistor is interconnected with a first end of the tenth capacitor, a first end of the eleventh resistor and a first end of the twelfth resistor, a second end of the tenth capacitor is interconnected with a second end of the eleventh resistor and a second end of the eleventh resistor, a second end of the twelfth resistor is interconnected with a first end of the eleventh capacitor and a third end of the first rectifier diode, a second end of the first rectifier diode is connected with the second power supply end, and a first end of the first rectifier diode is grounded.

7. The test circuit for a high voltage power supply as claimed in any one of claims 1 to 6, characterized in that, The charging and discharging circuit comprises: a capacitor control contactor circuit, an input end of the capacitor control contactor circuit is connected with a power supply output end of the power supply module, a controlled end of the capacitor control contactor circuit is connected with the processor, and the capacitor control contactor circuit is used for controlling the circuit connection between the output end and the input end to be turned on or turned off under the control of the processor; a charging capacitor, a first end of the charging capacitor is connected with an output end of the capacitor control contactor circuit, and the charging capacitor is used for receiving a charging voltage output by the power supply module to be charged when the capacitor control contactor circuit is turned on; a MOS control contactor circuit, an input end of the MOS control contactor circuit is connected with a second end of the charging capacitor, a controlled end of the MOS control contactor circuit is connected with the processor, and the MOS control contactor circuit is used for controlling the circuit connection between the output end and the input end to be turned on or turned off under the control of the processor; a discharging resistor, an input end of the discharging resistor is connected with an output end of the MOS control contactor circuit, and the discharging resistor is used for discharging the charging capacitor when the MOS control contactor circuit is turned on.

8. The test circuit for a high voltage power supply of claim 7, wherein, The detection circuit further comprises: An error and fullness detection circuit, an input end of the fullness detection circuit is interconnected with a power output end of the power module and an input end of the charging and discharging circuit, an output end of the fullness detection circuit is connected with the processor, the fullness detection circuit is used for detecting a voltage of the charging capacitor and outputting a fullness detection signal to the processor when the charging capacitor is full.

9. The test circuit for a high voltage power supply of claim 7, wherein, The detection circuit further comprises: An open circuit and short circuit detection circuit, an input end of the open circuit and short circuit detection circuit is connected with an output end of the MOS control contactor circuit, an output end of the open circuit and short circuit detection circuit is connected with the processor, the open circuit and short circuit detection circuit is used for detecting a voltage of the output end of the MOS control contactor circuit and outputting a on-off detection signal to the processor when the MOS control contactor circuit is turned on under the control of the processor.

10. A test system for a high voltage power supply, characterized by The test system of the high-voltage power supply comprises a power supply circuit, a host computer and the high-voltage power supply test circuit according to any one of claims 1 to 9, the power supply circuit is electrically connected with the high-voltage power supply test circuit, and the high-voltage power supply test circuit is in communication connection with the host computer.

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