High-voltage direct-current power supply

Abstract

The utility model discloses a high-voltage direct-current power supply which comprises an input protection module, a filtering module, an isolation voltage regulating module, a voltage doubling rectifying module and an output measurement and protection module, the output end of the input protection module is connected with the input end of the filtering module, and the output end of the filtering module is connected with the input end of the isolation voltage regulating module. The output end of the isolation voltage regulation module is connected with the input end of the voltage doubling rectification module, and the output end of the voltage doubling rectification module is connected with the input end of the output measurement and protection module. According to the high-voltage direct-current power supply, components with relatively low working voltage requirements are selected, the types of the used components are simplified, high-efficiency high-voltage direct-current output is realized, the high-voltage direct-current power supply is easy to realize and high in reliability, and the production cost and the maintenance cost of the high-voltage direct-current power supply are reduced; and meanwhile, through the design of the adjustable transformer and the expandable voltage doubling rectifying module, continuous and adjustable high-voltage direct current output is realized, the maximum output voltage can reach hundreds of kV magnitude, and the high-voltage direct-current power supply can be widely applied to the technical field of power supply design.

Description

TECHNICAL FIELD

[0001] The utility model relates to power supply design technical field especially relates to a high voltage direct current power supply. BACKGROUND

[0002] Transient signal source is widely applied in electromagnetic compatibility test, wherein GJB151 series standards (including GJB151A-97, GJB152A-97 and GJB151B-2013) stipulate electromagnetic emission and sensitivity requirement and test method of military electronic, electrical and electromechanical equipment and subsystem, contain 21 requirements of four categories of conducted emission, conducted sensitivity, radiated emission, radiated sensitivity, and give the corresponding test method.The standard is the electromagnetic compatibility basic standard of three armies, and is suitable for demonstration, design, production, test and ordering of military equipment and subsystem, provides electromagnetic compatibility design and acceptance basis for development and ordering unit.

[0003] And the transient test project (such as CS106, CS112, CS115, CS116, RS105) in the standard needs transient signal generator in test, and other general standards (such as surge, electric fast transient burst, lightning, high voltage static electricity, etc.) also need transient signal generator.Such transient signal generator needs high voltage direct current power supply, and requires high transient power and small steady power.

[0004] At present, high voltage direct current power supply technology is mature, especially 1kV below high voltage direct current power supply, and the shelf product variety is numerous, and can satisfy the demand of most use scene, but 1kV above (especially 10kV and above), and its high voltage direct current power supply all need customization, and the used components are many, and the working voltage requirement of the used components is high, and the output high voltage is discontinuous and adjustable, cannot satisfy the demand scene of multiple transient sources to high voltage power supply. UTILITY MODEL CONTENT

[0005] The utility model aims at solving one of the technical problems in the prior art at least to some extent.

[0006] Therefore, one purpose of the utility model embodiment is to provide a high voltage direct current power supply, which realizes low-cost, high-reliability and continuous adjustable high voltage direct current output by selecting a few kinds of working components with low working voltage and the expandable design of the voltage doubling rectifier module.

[0007] The first technical scheme adopted by the utility model is:

[0008] A high-voltage direct-current power supply, characterized in that it comprises an input protection module, a filter module, an isolation voltage regulation module, a voltage doubling rectification module, an output measurement and protection module, the output end of the input protection module is connected with the input end of the filter module, the output end of the filter module is connected with the input end of the isolation voltage regulation module, the output end of the isolation voltage regulation module is connected with the input end of the voltage doubling rectification module, and the output end of the voltage doubling rectification module is connected with the input end of the output measurement and protection module.

[0009] Further, the input protection module comprises an alternating current input power supply, a fuse and a control switch, the negative electrode of the alternating current input power supply is connected with the control switch, the control switch and the filter circuit are both connected with the fuse, and the positive electrode of the alternating current input power supply is connected with the filter circuit.

[0010] Further, the filter module comprises a first filter inductor, a second filter inductor, a third filter inductor, a fourth filter inductor, a first filter capacitor, a second filter capacitor and a third filter capacitor, the upper plate of the first filter capacitor, the upper plate of the second filter capacitor and the third filter inductor are all connected with the first inductor, the lower plate of the first filter capacitor, the lower plate of the second filter capacitor and the fourth filter inductor are all connected with the second inductor, the upper plate of the second filter capacitor and the upper plate of the third filter capacitor are all connected with the third inductor, and the lower plate of the second filter capacitor and the lower plate of the third filter capacitor are all connected with the fourth inductor.

[0011] Further, the isolation voltage regulation module comprises an isolation transformer, the input end of the isolation transformer is connected with the output end of the filter module, and the output end of the isolation transformer is connected with the input end of the voltage doubling rectification module.

[0012] Further, the voltage doubling rectification module comprises a plurality of rectification units and a plurality of voltage doubling units, the rectification units are used for rectifying alternating current input into direct current output, and the voltage doubling units are used for multiplying input voltage.

[0013] Further, the rectification unit comprises a first diode, a second diode, a third diode and a fourth diode, the input end of the first diode is connected with the third diode, the output end of the first diode is connected with the input end of the second diode, the output end of the third diode is connected with the input end of the fourth diode, and the output end of the second diode is connected with the output end of the fourth diode.

[0014] Further, the voltage doubling unit comprises a voltage doubling capacitor and a resistor, the upper plate of the voltage doubling capacitor and the lower plate of the voltage doubling capacitor are both connected with the resistor.

[0015] Further, the output measurement and protection module comprises a current measuring instrument and a voltage measuring instrument.

[0016] The utility model discloses the beneficial effect is: the utility model discloses through the selection work voltage requirement lower component and the kind of component of simplification used, has realized efficient high voltage direct current output, is easy to realize and high reliability, has reduced high voltage direct current power supply's production cost and maintenance cost, simultaneously, the utility model discloses still through adjustable transformer and the expandable voltage doubler rectifier module design, has realized the high voltage direct current output of continuous adjustable, and the highest output voltage can reach several hundred kV magnitude. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The system principle diagram of a high voltage direct current power supply is provided for the utility model embodiment;

[0018] Figure 2 The partial circuit schematic diagram of the implementation example of a high voltage direct current power supply is provided for the utility model embodiment;

[0019] Figure 3 The schematic diagram of the output voltage and working time relation of a high voltage direct current power supply is provided for the utility model embodiment;

[0020] Figure 4 The schematic diagram of the maximum working voltage stress of capacitor and resistance component is provided for the utility model embodiment;

[0021] Figure 5 The schematic diagram of the maximum working voltage stress of rectifier diode component is provided for the utility model embodiment.

[0022] Figure 6 The structural schematic diagram of input protection module is provided for the utility model embodiment;

[0023] Figure 7 The structural schematic diagram of filter module is provided for the utility model embodiment;

[0024] Figure 8 The structural schematic diagram of rectifier unit is provided for the utility model embodiment;

[0025] Figure 9 The structural schematic diagram of voltage doubler unit is provided for the utility model embodiment. DETAILED DESCRIPTION

[0026] The embodiments of the present application are described below in detail, examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as limiting the present application. For the step numbers in the following embodiments, only for facilitating the description, the order between the steps is not limited, and the execution order of each step in the embodiments can be adaptively adjusted according to the understanding of the person skilled in the art.

[0027] In the description of the present application, the meaning of multiple is two or more than two, if there is a description of the first, the second is only used for distinguishing the purpose of technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the relationship between the indicated technical features. In addition, unless otherwise defined,

[0028] All technical and scientific terms used herein have the same meaning as understood by those skilled in the art.

[0029] Figure 1 The system principle diagram of the high-voltage direct-current power supply provided by the embodiments of the present application is referred to Figure 1 The embodiments of the present application provide a high-voltage direct-current power supply, characterized in that, comprising an input protection module, a filter module, an isolation voltage regulating module, a voltage doubling rectifier module, an output measurement and protection module, the output end of the input protection module is connected with the input end of the filter module, the output end of the filter module is connected with the input end of the isolation voltage regulating module, the output end of the isolation voltage regulating module is connected with the input end of the voltage doubling rectifier module, the output end of the voltage doubling rectifier module is connected with the input end of the output measurement and protection module.

[0030] Specifically, referring to Figure 1In the embodiment, the input protection module includes an AC input power supply, a fuse and a control switch, wherein the input voltage of the AC input power supply is 220V and the frequency is 50Hz, the fuse is used to protect the input circuit from overload or short circuit, prevent transient overcurrent or overvoltage from causing damage to the subsequent circuit, and the control switch is used to control the start and stop of the input power supply; the filter module filters the high-frequency noise in the input power supply through a capacitor and an inductor, reduces the ripple, and provides a pure and high input voltage for the subsequent module; the isolation and voltage regulation module mainly includes an adjustable transformer, which is used to adjust the output voltage to a level suitable for the processing of the voltage doubling and rectification module, and cooperates with the voltage doubling and rectification module to realize continuous adjustable high-voltage DC output. At the same time, the adjustable transformer also realizes the electrical isolation between the input power supply and the high-voltage DC output, and improves the safety of the system; the voltage doubling and rectification module includes a plurality of rectification units and voltage doubling units, the rectification units are connected with each other to form a full-bridge rectifier, and the voltage doubling units are connected with each other in series or parallel to form a multi-stage voltage doubling circuit, so as to realize step-by-step voltage multiplication of the input voltage; the output measurement and protection module includes a voltage measuring instrument and a current measuring instrument, which are used to monitor the voltage and current of the high-voltage DC output in real time, ensure that the output parameters meet the requirements, and at the same time, provide ground protection, overvoltage protection and short circuit protection functions, and ensure the safe operation of the load and the system. Figure 2 According to the system principle diagram provided in the embodiment Figure 1 Part of the circuit schematic diagram of one embodiment of the high-voltage DC power supply designed according to the system principle diagram is shown in FIG. 1. Figure 2 As shown in FIG. 1, in the embodiment, the output of the AC input power supply is preliminarily adjusted at the adjustable transformer to adjust the output voltage to a level suitable for the processing of the voltage doubling and rectification module, while ensuring the electrical isolation between different modules; in the voltage doubling and rectification module, each voltage doubling unit is composed of a capacitor and a resistor, wherein the capacitor is used to store energy and discharge in each period, and the resistor is used to control the discharge rate of the capacitor to prevent the damage of components caused by excessive output current, and the cascade of multiple voltage doubling units realizes the multiplication of voltage, and the full-bridge rectifier composed of multiple rectification units rectifies the positive half cycle and the negative half cycle of the AC input power supply into DC according to the conduction characteristics of the diode, thereby improving the power of the system.

[0031] It can be realized that in the embodiment, the high-voltage direct-current output is mainly realized by the adjustable transformer, the resistance, the capacitor and the diode, the selected components have lower requirements on the working voltage, the cost is low, the structure is simple, it is easy to realize and has high reliability, and the production cost and the maintenance cost of the high-voltage direct-current power supply are reduced; in addition, the embodiment also rectifies the input of the alternating-current input power supply through the full-bridge rectifier composed of multiple rectification units, and the power of the system is improved; at the same time, the output range of the adjustable transformer in the embodiment is variable, and the multi-stage cascade design of the voltage doubling unit in the voltage doubling rectification module can also change the number according to the actual application requirements, and the continuously adjustable high-voltage direct-current output can be realized by adjusting the output voltage of the adjustable transformer and the connection relationship of the voltage doubling unit. The relationship between the output voltage and the working time of the present example is shown in Figure 3 , in the case that the input voltage of the alternating-current input power supply is 220V, 50Hz, the highest output voltage can reach 4.3kV, and the power can reach 500W, according to the schematic diagram of the maximum working voltage stress of the capacitor and the resistance component (the maximum working voltage stress < 310V) as shown in Figure 3 and the schematic diagram of the maximum working voltage stress of the rectification diode component (the maximum working voltage stress < 600V) as shown in Figure 4 , the design of the voltage doubling rectification module can be expanded, and the highest output voltage can reach several hundred kV.

[0032] Referring to Figure 6 , further as an optional implementation manner, the input protection module includes an alternating-current input power supply, a fuse and a control switch, the negative pole of the alternating-current input power supply is connected with the control switch, the control switch and the filter circuit are both connected with the fuse, and the positive pole of the alternating-current input power supply is connected with the filter circuit.

[0033] Specifically, Figure 6 the legends of the drawings are as follows: the alternating-current input power supply AC, the fuse FU and the control switch S1, wherein the input voltage of the alternating-current input power supply is 220V, the frequency is 50Hz, the fuse is used for protecting the input circuit from overload or short circuit, preventing transient overcurrent or overvoltage from causing damage to the subsequent circuit, and the control switch is used for controlling the start and stop of the input power supply.

[0034] Referring to Figure 7, further as optional implementation, the filter module includes a first filter inductor, a second filter inductor, a third filter inductor, a fourth filter inductor, a first filter capacitor, a second filter capacitor and a third filter capacitor, the upper plate of the first filter capacitor, the upper plate of the second filter capacitor and the third filter inductor are all connected with the first inductor, the lower plate of the first filter capacitor, the lower plate of the second filter capacitor and the fourth filter inductor are all connected with the second inductor, the upper plate of the second filter capacitor and the upper plate of the third filter capacitor are all connected with the third inductor, and the lower plate of the second filter capacitor and the lower plate of the third filter capacitor are all connected with the fourth inductor.

[0035] Specifically, Figure 7 The legends of the first filter inductor L1, the second filter inductor L2, the third filter inductor L3, the fourth filter inductor L4, the first filter capacitor C1, the second filter capacitor C2 and the third filter capacitor C3 are as follows: the LC filter circuit composed of the capacitor and the inductor can filter the high-frequency noise in the input power supply, reduce the ripple and provide a pure and high input voltage for the subsequent module.

[0036] Further as optional implementation, the isolation voltage regulating module includes an isolation transformer, the input end of the isolation transformer is connected with the output end of the filter module, and the output end of the isolation transformer is connected with the input end of the voltage doubling rectification module.

[0037] Further as optional implementation, the voltage doubling rectification module includes a plurality of rectification units and a plurality of voltage doubling units, the rectification units are used to rectify the alternating current input into direct current output, and the voltage doubling units are used to multiply the input voltage.

[0038] Referring to Figure 8 Further as optional implementation, the rectification unit includes a first diode, a second diode, a third diode and a fourth diode, the input end of the first diode is connected with the third diode, the output end of the first diode is connected with the input end of the second diode, the output end of the third diode is connected with the input end of the fourth diode, and the output end of the second diode is connected with the output end of the fourth diode.

[0039] Specifically, Figure 8 The legends of the first diode D1, the second diode D2, the third diode D3 and the fourth diode D4 are as follows: the full-bridge rectifier composed of a plurality of rectification units rectifies the positive half cycle and the negative half cycle of the alternating current input power supply into direct current respectively according to the conduction characteristics of the diodes, thereby improving the output power of the system.

[0040] Referring to Figure 9 Further as optional implementation, the voltage doubling unit includes a voltage doubling capacitor and a resistor, the upper plate of the voltage doubling capacitor and the lower plate of the voltage doubling capacitor are both connected with the resistor.

[0041] In particular, Figure 9 The legend of the figure is as follows: the voltage doubling capacitor C and the resistor R, each voltage doubling unit is composed of a capacitor and a resistor, wherein the capacitor is used to store energy and discharge in each cycle, and the resistor is used to control the discharge rate of the capacitor to prevent the output current from being too large to cause damage to components, and the cascade of multiple voltage doubling units realizes the multiplication of voltage.

[0042] Further, as an optional embodiment, the output measurement and protection module comprises a current measuring instrument and a voltage measuring instrument.

[0043] The above is only a preferred embodiment of the present application, and the present application is not limited to the above embodiments, as long as the same means are used to achieve the technical effects of the present application, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included within the scope of protection of the present application. The technical solutions and / or embodiments can have various modifications and changes within the scope of protection of the present application.

Claims

1. A high-voltage DC power supply, characterized in that, It includes an input protection module, a filtering module, an isolation voltage regulation module, a voltage multiplier rectifier module, and an output measurement and protection module. The output terminal of the input protection module is connected to the input terminal of the filtering module, the output terminal of the filtering module is connected to the input terminal of the isolation voltage regulation module, the output terminal of the isolation voltage regulation module is connected to the input terminal of the voltage multiplier rectifier module, and the output terminal of the voltage multiplier rectifier module is connected to the input terminal of the output measurement and protection module.

2. The high-voltage DC power supply according to claim 1, characterized in that, The input protection module includes an AC input power supply, a fuse, and a control switch. The negative terminal of the AC input power supply is connected to the control switch. Both the control switch and the filtering module are connected to the fuse. The positive terminal of the AC input power supply is connected to the filtering module.

3. The high-voltage DC power supply according to claim 1, characterized in that, The filtering module includes a first filtering inductor, a second filtering inductor, a third filtering inductor, a fourth filtering inductor, a first filtering capacitor, a second filtering capacitor, and a third filtering capacitor. The upper plate of the first filtering capacitor, the upper plate of the second filtering capacitor, and the third filtering inductor are all connected to the first filtering inductor. The lower plate of the first filtering capacitor, the lower plate of the second filtering capacitor, and the fourth filtering inductor are all connected to the second filtering inductor. The upper plates of the second filtering capacitor and the upper plates of the third filtering capacitor are all connected to the third filtering inductor. The lower plates of the second filtering capacitor and the lower plates of the third filtering capacitor are all connected to the fourth filtering inductor.

4. A high-voltage DC power supply according to claim 1, characterized in that, The isolation voltage regulation module includes an isolation transformer, the input terminal of which is connected to the output terminal of the filter module, and the output terminal of the isolation transformer is connected to the input terminal of the voltage doubler rectifier module.

5. A high-voltage DC power supply according to claim 1, characterized in that, The voltage multiplier rectifier module includes several rectifier units and several voltage multiplier units. The rectifier units are used to rectify AC input into DC output, and the voltage multiplier units are used to multiply the input voltage.

6. A high-voltage DC power supply according to claim 5, characterized in that, The rectifier unit includes a first diode, a second diode, a third diode, and a fourth diode. The input terminal of the first diode is connected to the third diode, the output terminal of the first diode is connected to the input terminal of the second diode, the output terminal of the third diode is connected to the input terminal of the fourth diode, and the output terminal of the second diode is connected to the output terminal of the fourth diode.

7. A high-voltage DC power supply according to claim 5, characterized in that, The voltage multiplier unit includes a voltage multiplier capacitor and a resistor, and the upper plate and the lower plate of the voltage multiplier capacitor are both connected to the resistor.

8. A high-voltage DC power supply according to claim 1, characterized in that, The output measurement and protection module includes a current measuring instrument and a voltage measuring instrument.

Images