Multi-stage regulation high-voltage capacitor electricity taking module

Abstract

The invention discloses a multi-stage regulation high-voltage capacitor electricity taking module which comprises an electricity taking circuit connected with an external high-voltage line to receive electric energy of the high-voltage line and output the electric energy after voltage transformation isolation and voltage reduction; the rectifying circuit is composed of a rectifying diode Z, a capacitor C1 and a capacitor C2; the rectifier diode Z is connected with the power taking circuit, the capacitor C2 is connected between the rectifier diode Z and the power taking circuit, and the capacitor C1 is connected to the output end of the rectifier diode Z and converts alternating voltage output by the power taking circuit into direct voltage to be output; and the plurality of voltage stabilizing circuits are mutually connected in parallel and then are connected to the output end of the rectifier diode Z, so that the current output by the rectifier diode Z is graded, and finally stable voltage is output to supply power to an external output load. According to the multi-stage regulation high-voltage capacitor power taking module, through the arrangement of the plurality of voltage stabilizing circuits, a multi-path shunting mode can be adopted, and the power taking module has a wider output voltage range.

Description

Technical Field

[0001] The present invention relates to a power taking module, and more particularly to a multi-stage regulating high voltage capacitor power taking module. Background Art

[0002] High-voltage capacitor power supply technology refers to a technology that converts high-voltage electrical energy of high-voltage transmission lines into safe low-voltage electrical energy. It is usually used to supply stable power to low-voltage secondary control electrical equipment of high-voltage lines and equipment. It can ensure the long-term use of load equipment and is suitable as a reliable power supply equipment for online detection, inspection, anti-theft, control and other electrical equipment on high-voltage transmission lines.

[0003] Currently, existing electrical equipment is powered by either a DC power supply or an AC power supply. The existing high-voltage power supply converts the AC power on the high-voltage line into a regulated DC power supply output. However, within the normal operating voltage range, the existing power supply has a large partial discharge characteristic, which is a source of interference and will interfere with and affect electrical equipment and instruments. In addition, the output voltage accuracy achieved is relatively low. For equipment with higher requirements, its actual scope of application will be insufficient and the interference will be too large. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a multi-stage adjustable high-voltage capacitor power supply module with a larger output voltage range, smaller local discharge characteristics, and capable of outputting both AC and DC and having a wider range of uses.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a multi-stage regulating high-voltage capacitor power supply module, characterized in that it includes: A power-taking circuit, which is connected to an external high-voltage line to receive electric energy from the high-voltage line and output the electric energy after voltage transformation, isolation and voltage reduction; The rectifier circuit is composed of a rectifier diode Z and capacitors C1 and C2; the rectifier diode Z is connected to the power-taking circuit, the capacitor C2 is connected between the rectifier diode Z and the power-taking circuit, and the capacitor C1 is connected to the output end of the rectifier diode Z to convert the AC voltage output by the power-taking circuit into a DC voltage output; A plurality of voltage stabilizing circuits are connected in parallel to the output end of the rectifier diode Z to grade the current output by the rectifier diode Z, so as to finally output a more stable voltage to supply power to the external output load, while reducing current modulation harmonics; Among them, multiple voltage stabilizing circuits are combined to adjust the voltage size of the final output stable voltage by adjusting the current size flowing through themselves. Multiple voltage stabilizing circuits are divided into 1 to n levels, and the adjustment method is step-by-step adjustment, that is, when the current level of voltage stabilizing circuit is adjusted to the load limit, the next level of voltage stabilizing circuit is turned on and starts to adjust.

[0006] As a further improvement of the present invention, the voltage stabilizing circuit has a consumption load, and the output voltage is controlled by adjusting the current of the internal consumption load, thereby achieving the stability of the output voltage; Among them, when the output load becomes lighter, that is, the output current becomes smaller and the output voltage becomes higher, the voltage stabilization circuit reduces the output voltage by increasing the current flowing through the internal consumption load; when the output load becomes heavier, the voltage stabilization circuit increases the output voltage by reducing the current on the internal consumption load; Alternatively, when the input voltage becomes higher, that is, the output voltage becomes higher, the output voltage is reduced by increasing the current flowing through the internal consumption load; when the input voltage becomes lower, the output voltage is increased by reducing the current on the internal consumption load.

[0007] As a further improvement of the present invention, the voltage stabilizing circuit comprises: A consumption resistor RLn, the consumption resistor RLn is a consumption load, one end of the consumption resistor RLn is connected to the output end of the rectifier diode Z; and is in parallel relationship with the external output load; The modulation tube Qn has a first end connected to the end of the consumption resistor RLn, a second end connected to the output end of the overall module, and forms a current loop with the consumption resistor RLn; the control end receives a signal to adjust the current flowing between the consumption resistor RLn and the output end; A control circuit U, which is connected to the control end of the modulation tube Qn to send a signal to the control end of the modulation tube Qn; Among them, when the output load becomes lighter or the input voltage becomes higher, that is, the output voltage becomes higher, the control circuit U controls the modulator Qn to increase the current flowing through the internal consumption resistor RLn to reduce the output voltage; when the output load becomes heavier or the input voltage becomes lower, the modulator Qn reduces the current on the internal consumption resistor RLn to increase the output voltage on the output load, so that the output voltage is stabilized within a certain value, and the consumption resistor RLn and the modulation tube Qn are the levels of the voltage stabilizing circuit. When the voltage stabilizing circuit of this level is adjusted to the load limit, that is, the modulation tube Qn is in full conduction. When the modulation current is in the on or off state, the control circuit U starts to control the modulation tube Qn±1 to keep it in the working state. When the voltage stabilizing circuit of this level starts to work and adjust, the control circuit U controls the modulation tube Qn±1 to adjust the current flowing through the consumption resistor RLn±1 in the above manner, thereby performing modulation step by step to achieve finer and more accurate current regulation, as well as expansion of the voltage stabilization and power range; since the modulation current is divided into m parts in the circuit, the current to be modulated each time becomes m times smaller, and its current harmonics become very small, which reduces the interference of the control circuit on the primary high-voltage line feedback and reduces its partial discharge characteristics.

[0008] As a further improvement of the present invention, the modulator tube Qn is a triode, the collector of which is connected to the end of the consumption resistor RLn, the emitter is connected to the output end of the overall module, and the base is connected to the control circuit U. The control circuit U controls the current flowing through the consumption resistor RLn by changing the current input into the base.

[0009] As a further improvement of the present invention, the modulator tube Qn is a field effect tube, the drain of which is connected to the end of the consumption resistor RLn, the source is connected to the output end of the overall module, and the gate is connected to the control circuit U. The control circuit U controls the current flowing through the consumption resistor RLn by changing the duty cycle of the square wave input to the gate.

[0010] As a further improvement of the present invention, the power taking circuit comprises: A high-voltage step-down capacitor C, one end of which is connected to one end of an external high-voltage line; The transformer T has its input side connected to the end of the step-down capacitor C, and the other end connected to the other end of the high-voltage line to form a loop to receive the electric energy stepped down by the step-down capacitor C, and further step down and isolate the electric energy before outputting it through the output side of the transformer T.

[0011] As a further improvement of the present invention, the control circuit U is also connected to an external output load as a sampling signal of the output voltage to form a closed-loop control.

[0012] As a further improvement of the present invention, the output side of the voltage stabilizing circuit is further connected to a diode D and a capacitor C3 and then connected to an output load.

[0013] As a further improvement of the present invention, it also includes: AC output interface, connected between the rectifier diode Z and the power taking circuit, used to output AC power to the external output load; Among them, the two output ends of the rectifier diode Z form a loop through the voltage stabilizing circuit, and do not output DC power to the outside, so as to adjust the DC current on the output side of the rectifier diode Z, thereby adjusting the AC voltage output by the AC output interface.

[0014] As a further improvement of the present invention, the voltage stabilizing circuit is further connected with a diode D and a capacitor C3 to form a loop, and the diode D is further connected in parallel with a resistor R2.

[0015] The beneficial effect of the present invention is that, by setting up the power taking circuit and the voltage stabilizing circuit, it is possible to simply and effectively take power from the high-voltage line, and output it after isolation, step-down and rectification by a transformer. At the same time, a combination of multiple voltage stabilizing circuits is adopted, so that the DC current finally outputted can be effectively graded by using multiple voltage stabilizing circuits. Therefore, compared with the methods in the prior art, it has lower modulation current harmonic interference, a wider voltage range, and a wider application range of the corresponding power taking module. At the same time, a method of step-by-step regulation and coordinated control of output voltage stabilization by multiple voltage stabilizing circuits is adopted. When a single voltage stabilizing circuit fails, the remaining voltage stabilizing circuits can still work normally to adjust the output voltage. Therefore, compared with the single-channel regulation and control method in the prior art, it has stronger reliability. At the same time, since the energy on the input side of the transformer is always in a balanced state and the adjusted current is shunted through multiple stages, the current fluctuation and current harmonic components on the primary high-voltage circuit can be further effectively reduced, which has greater advantages and significance for the high-voltage ground leakage current power supply device, reducing the amplitude of the local discharge characteristics. In addition, through the setting of capacitor C2, the harmonic current of the circuit can also be effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A circuit diagram of a multi-stage adjustable high-voltage capacitor power supply module for direct current output according to Example 1; Figure 2 This is a circuit diagram of the multi-stage adjustable high-voltage capacitor power supply module for AC output of Example 2. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below with reference to the embodiments given in the accompanying drawings. In this embodiment, two output power supply solutions are provided, namely, AC output power supply and DC output power supply.

[0018] DC output power supply reference Figure 1 As shown, a multi-stage adjustable high-voltage capacitor power supply module of this embodiment includes: The power taking circuit 1 is connected to an external high-voltage line to receive electric energy from the high-voltage line and output the electric energy after voltage transformation, isolation and voltage reduction; The rectifier circuit is composed of a rectifier diode Z, capacitors C1 and C2; the rectifier diode Z is connected to the power circuit 1, the capacitor C2 is connected between the rectifier diode Z and the power circuit 1, and the capacitor C1 is connected to the output end of the rectifier diode Z to convert the AC voltage output by the power circuit 1 into a DC voltage output; A plurality of voltage stabilizing circuits 2 are connected in parallel to the output end of the rectifier diode Z to classify the current output by the rectifier diode Z and finally output a stable voltage to supply power to the external output load; Among them, multiple voltage stabilizing circuits 2 are combined to adjust the voltage size of the final output stable voltage by adjusting the current size flowing through themselves. Multiple voltage stabilizing circuits 2 are divided into 1 to n levels, and the adjustment method is step-by-step adjustment, that is, when the current level voltage stabilizing circuit 2 is adjusted to the load limit, the next level voltage stabilizing circuit 2 is turned on and starts to adjust. In the process of using the multi-stage adjustment high-voltage capacitor power supply module of this embodiment, through the power supply circuit 1 and the rectifier circuit, the setting of multiple voltage stabilizing circuits 2 can effectively realize the use of multiple voltage stabilizing circuits 2 to realize the graded modulation of the final output power supply voltage, so as to achieve the effect that the voltage finally output by the power supply module has a larger range, further increasing the application scope of the power supply module, reducing current harmonic interference, and in addition, when a single voltage stabilizing circuit 2 fails, the power supply module can also work normally, greatly increasing the reliability.

[0019] As a specific implementation of the improvement, the voltage stabilizing circuit 2 has a consumption load inside, and the output voltage is controlled by adjusting the current of the internal consumption load, thereby achieving the stability of the output voltage; Among them, when the output load becomes lighter, that is, the output current becomes smaller and the output voltage becomes higher, the voltage stabilizing circuit 2 reduces the output voltage by increasing the current flowing through the internal consumption load; when the output load becomes heavier, the output voltage is increased by reducing the current on the internal consumption load. In the process of voltage stabilizing control performed by the voltage stabilizing circuit 2, compared with the method in the prior art, it can be achieved under high load conditions, that is, when the power taking module outputs under heavy load, the internal digestion load does not consume energy, and all energy is used for output; therefore, the loss is very low at full power output, and thus very little heat is generated. At the same time, since the detection equipment on the actual high-voltage line basically does not have the condition of no-load operation, compared with the existing method, it can effectively achieve the effect of very low overall loss, and through the setting of capacitor C2, the current harmonics of the overall circuit can also be reduced. Similarly, when the input voltage becomes higher, the voltage applied to the load is stabilized by increasing the internal consumption. When the input voltage becomes lower, the voltage applied to the output load is stabilized by reducing the internal consumption, thereby achieving the output DC voltage stabilization when the input voltage changes.

[0020] As an improved specific implementation, the voltage stabilizing circuit 2 includes: A consumption resistor RLn, the consumption resistor RLn is a consumption load, one end of the consumption resistor RLn is connected to the output end of the rectifier diode Z; and is in parallel relationship with the external output load; The modulation tube Qn has a first end connected to the end of the consumption resistor RLn, a second end connected to the output end of the overall module, and forms a current loop with the consumption resistor RLn; the control end receives a signal to adjust the current flowing between the consumption resistor RLn and the output end; A control circuit U, which is connected to the control end of the modulation tube Qn to send a signal to the control end of the modulation tube Qn; Wherein, when the output load becomes lighter or the input voltage becomes higher, that is, the output current becomes smaller and the output voltage becomes higher, the control circuit U controls the modulator Qn to increase the current flowing through the internal consumption resistor RLn to reduce the output voltage; when the output load becomes heavier or the input voltage becomes lower, the modulator Qn reduces the current on the internal consumption resistor RLn to increase the output voltage on the output load, thereby stabilizing the output voltage within a certain value; when the external load becomes heavier, the modulator Qn reduces the current on the internal consumption resistor RLn to increase the output voltage on the output load, thereby stabilizing the output voltage within a certain value, and n in the consumption resistor RLn and the modulator Qn is the level value of the voltage stabilizing circuit (2). When the voltage stabilizing circuit (2) of this level is adjusted to the load limit, that is, when the modulator Qn is in a fully on or off state, the control circuit U starts to control The control circuit U controls the modulation tube Qn±1 to maintain the working state. When the voltage stabilizing circuit (2) of this level starts to work and regulate, the control circuit U controls the modulation tube Qn±1 to regulate the current flowing through the consumption resistor RLn±1 in the above manner, thereby performing modulation step by step, thereby achieving finer and more accurate current regulation, as well as expansion of the voltage regulation and power range. Since the modulation current is divided into m parts in the circuit, the current to be modulated each time becomes m times smaller, and its current harmonics become very small, so that the interference of the control circuit on the feedback of the primary high-voltage line becomes smaller, and its partial discharge characteristics become smaller. By setting the consumption resistor RLn, the adjustment current value can be effectively adjusted, thereby adjusting the consumption current limit value, that is, the voltage regulation range can be adjusted. By combining the modulation tube Qn and the control circuit U, it is possible to effectively control the current flowing through the consumption resistor RLn according to the output load change, thereby achieving output voltage regulation.

[0021] As a specific implementation of the improvement of the modulator tube Qn, the modulator tube Qn is a triode, the collector of the triode is connected to the end of the consumption resistor RLn, the emitter is connected to the output end of the overall module, and the base is connected to the control circuit U. The control circuit U controls the current flowing through the consumption resistor RLn by changing the current input into the base. The current amplification principle of the triode can be used to control the current flowing through the consumption resistor RLn. In addition, a step-by-step control method for switching on and off or amplifying the triode is adopted. Compared with the single-stage control method in the prior art, it has higher accuracy and achieves a more stable output voltage.

[0022] As another specific implementation of the improvement of the modulator Qn, the modulator Qn is a field effect tube, the drain of the field effect tube is connected to the end of the consumption resistor RLn, the source is connected to the output end of the overall module, and the gate is connected to the control circuit U. The control circuit U controls the current flowing through the consumption resistor RLn by changing the duty cycle of the square wave input into the gate. By transmitting the PWM signal to the field effect tube Q, the on-time ratio of the modulator Qn can be changed by changing the duty cycle of the square wave output by the control circuit U, and the current flowing through the consumption resistor RLn can be further changed. In addition, a step-by-step control method of the on-off of the field effect tube or the duty cycle adjustment is adopted, so that multiple consumption resistors RLn with larger resistance values ​​can be used, thereby reducing the current change amplitude each time the field effect tube is turned on and adjusted, thereby reducing current harmonics.

[0023] As an improved specific implementation, the power taking circuit 1 includes: A step-down capacitor C, one end of which is connected to one end of an external high-voltage line; Transformer T, the input side of the transformer T is connected to the end of the step-down capacitor C, and the other end is connected to the other end of the high-voltage line to form a loop to receive the electric energy after the step-down capacitor C, and further step down and isolate the electric energy before outputting it through the output side of the transformer T. By setting the step-down capacitor C, the voltage input from the external high-voltage line can be effectively stepped down so that the voltage can be converted by the transformer T, and by setting the transformer T, the voltage stepped down by the step-down capacitor C can be further stepped down and safely isolated before output.

[0024] As an improved specific implementation, the control circuit U is also connected to the external output load terminal interface as a sampling signal of the output voltage to form a closed-loop control, thereby increasing the accuracy of the control circuit U in controlling the current flowing through the consumption resistor RLn.

[0025] As a specific implementation of the improvement, the output side of the voltage stabilizing circuit 2 is also connected to a diode D and a capacitor C3 and then connected to the output load, so as to achieve isolation of the output load from the voltage stabilizing circuit, while reducing the internal current harmonics when the module is running, and further reducing the harmonic current on the input side of the transformer T in the power supply circuit 1.

[0026] Example 2 Reference Figure 2 As shown, the remaining components are the same as those in Example 1, except that: The AC output interface 3 is connected between the rectifier diode Z and the power taking circuit 1 and is used to output AC power to an external output load; Among them, the two output ends of the rectifier diode Z form a loop through the voltage stabilizing circuit 2, and do not output DC power to the outside, so as to adjust the DC current on the output side of the rectifier diode Z, and then adjust the AC voltage output by the AC output interface 3. In the process of using the power supply of this embodiment, the power supply circuit 1 can be used to isolate and reduce the voltage of the high-voltage line through the transformer and output it. Then, through the action of the rectifier circuit and the voltage stabilizing circuit 2, the current size in the overall power supply is regulated, and then the output voltage is regulated. Finally, the output interface 3 is used to achieve the regulated output of AC power. Since the output interface 3 is connected to the output end of the transformer, the AC power output by the AC output interface 3 is a sine wave, and compared with the DC / AC inversion method used in the prior art, the number of conversions is small and the corresponding conversion efficiency is higher.

[0027] As a specific implementation method of the improvement of Example 2, the voltage stabilizing circuit 2 is also connected to a diode D and a capacitor C3 to form a loop, and the diode D is also connected in parallel with a resistor R2. In this way, through the combined effect of the diode D and the capacitor C3, the internal current harmonics during module operation can be reduced, and the current harmonics on the input side of the transformer T in the power-taking circuit 1 can be further reduced, thereby suppressing the amplitude of the local discharge characteristics of the high-voltage system.

[0028] In summary, the multi-stage adjustable high-voltage capacitor power supply module of this embodiment adopts a method in which multiple voltage stabilizing circuits 2 jointly divide the voltage to process the final output power supply voltage, so that the power supply voltage has a larger adjustment range, thereby making the power supply module have a wider range of use.

[0029] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A multi-stage adjustable high-voltage capacitor power supply module, characterized in that: include: A power taking circuit (1), the power taking circuit (1) is connected to an external high voltage line to receive electric energy from the high voltage line, and outputs the electric energy after voltage transformation, isolation and voltage reduction; The rectifier circuit is composed of a rectifier diode Z and capacitors C1 and C2; the rectifier diode Z is connected to the power circuit (1), the capacitor C2 is connected between the rectifier diode Z and the power circuit (1), and the capacitor C1 is connected to the output end of the rectifier diode Z to convert the AC voltage output by the power circuit (1) into a DC voltage output; A plurality of voltage stabilizing circuits (2), wherein the plurality of voltage stabilizing circuits (2) are connected in parallel to the output end of the rectifier diode Z, so as to classify the current output by the rectifier diode Z, and finally output a stable voltage to supply power to an external output load; The plurality of voltage stabilizing circuits (2) are combined to adjust the voltage of the final output stable voltage by adjusting the current flowing through themselves. The plurality of voltage stabilizing circuits (2) are divided into 1 to n levels, and the adjustment method is step-by-step adjustment, that is, when the first level of voltage stabilizing circuit (2) is adjusted to the load limit, the next level of voltage stabilizing circuit (2) is turned on and starts to adjust.

2. The multi-stage adjustable high-voltage capacitor power supply module according to claim 1 is characterized in that: The voltage stabilizing circuit (2) has a consumption load inside, and the magnitude of the output voltage is controlled by adjusting the current of the internal consumption load, thereby achieving the stability of the output voltage; Wherein, when the output load becomes lighter, that is, the output current becomes smaller and the output voltage becomes higher, the voltage stabilizing circuit (2) reduces the output voltage by increasing the current flowing through the internal consumption load; when the output load becomes heavier, the voltage stabilizing circuit (2) increases the output voltage by reducing the current flowing through the internal consumption load; Alternatively, when the input voltage becomes higher, that is, the output voltage becomes higher, the output voltage is reduced by increasing the current flowing through the internal consumption load; when the input voltage becomes lower, the output voltage is increased by reducing the current on the internal consumption load.

3. The multi-stage adjustable high-voltage capacitor power supply module according to claim 2 is characterized in that: The voltage stabilizing circuit (2) comprises: A consumption resistor RLn, the consumption resistor RLn is a consumption load, one end of the consumption resistor RLn is connected to the output end of the rectifier diode Z; and is in parallel relationship with the external output load; The modulation tube Qn has a first end connected to the end of the consumption resistor RLn, a second end connected to the output end of the overall module, and forms a current loop with the consumption resistor RLn; the control end receives a signal to adjust the current flowing between the consumption resistor RLn and the output end; A control circuit U, which is connected to the control end of the modulation tube Qn to send a signal to the control end of the modulation tube Qn; Among them, when the output load becomes lighter or the input voltage becomes higher, that is, the output current becomes smaller and the output voltage becomes higher, the control circuit U controls the modulation tube Qn to increase the current flowing through the internal consumption resistor RLn to reduce the output voltage; when the output load becomes heavier or the input voltage becomes lower, the modulation tube Qn reduces the current on the internal consumption resistor RLn to increase the output voltage on the output load, so that the output voltage is stabilized within a certain value; Furthermore, n in the consumption resistor RLn and the modulation tube Qn is the level of the voltage stabilizing circuit (2). When the voltage stabilizing circuit (2) of this level is adjusted to the load limit, that is, the modulation tube Qn is in a fully on or off state, the control circuit U starts to control the modulation tube Qn±1 to maintain the working state. When the voltage stabilizing circuit (2) of this level starts to adjust the operation, the control circuit U controls the modulation tube Qn±1 to adjust the current flowing through the consumption resistor RLn±1 in the above manner, thereby performing modulation step by step.

4. The multi-stage adjustable high-voltage capacitor power supply module according to claim 3 is characterized in that: The modulator tube Qn is a triode, the collector of which is connected to the end of the consumption resistor RLn, the emitter is connected to the output end of the overall module, and the base is connected to the control circuit U. The control circuit U controls the current flowing through the consumption resistor RLn by changing the current input into the base.

5. The multi-stage adjustable high-voltage capacitor power supply module according to claim 3 is characterized in that: The modulator tube Qn is a field effect tube, the drain of which is connected to the end of the consumption resistor RLn, the source is connected to the output end of the overall module, and the gate is connected to the control circuit U. The control circuit U controls the current flowing through the consumption resistor RLn by changing the duty cycle of the square wave input to the gate.

6. The multi-stage adjustable high-voltage capacitor power supply module according to any one of claims 1 to 5, characterized in that: The power taking circuit (1) comprises: A high-voltage step-down capacitor C, one end of which is connected to one end of an external high-voltage line; The transformer T has an input side connected to the end of the high-voltage step-down capacitor C, and the other end connected to the other end of the high-voltage line to form a loop to receive the electric energy after the voltage is stepped down by the high-voltage step-down capacitor C, and output the electric energy through the output side of the transformer T after further stepping down and isolating the electric energy.

7. The multi-stage adjustable high-voltage capacitor power supply module according to claim 6 is characterized in that: The control circuit U is also connected to an external output load as a sampling signal of the output voltage to form a closed-loop control.

8. The multi-stage adjustable high-voltage capacitor power supply module according to claim 7 is characterized in that: The output side of the voltage stabilizing circuit (2) is also connected to a diode D and a capacitor C3 and then to an output load.

9. The multi-stage adjustable high-voltage capacitor power supply module according to claim 1, characterized in that: Also includes: An AC output interface (3), connected between the rectifier diode Z and the power taking circuit (1), for outputting AC power to an external output load; The two output ends of the rectifier diode Z form a loop through the voltage stabilizing circuit (2) and do not output a DC power supply to the outside, so as to adjust the DC current on the output side of the rectifier diode Z and thus adjust the AC voltage output by the AC output interface (3).

10. The multi-stage adjustable high-voltage capacitor power supply module according to claim 9, characterized in that: The voltage stabilizing circuit (2) is also connected to a diode D2 and a capacitor C4 to form a loop, and the diode D is also connected in parallel to a resistor R2.

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