Three-phase rectifier for high-frequency high-voltage direct current power source and control method of three-phase rectifier
一种三相整流器、高频高压的技术，应用在高效电力电子转换、交流功率输入变换为直流功率输出、电气元件等方向，能够解决不能实现滤波电容电压调节、没有解决滤波电容放电问题、不能实现单位功率因数校正滤波电容电压调节等问题，达到安全可控软启动的效果
Active Publication Date: 2016-10-12
ASIC PERCEPTION TECH (TIANJIN) CO LTD
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The following problems exist in the working process of high-frequency high-voltage DC power supply: (1) The use of high-frequency devices in three-phase rectifiers and booster circuits has caused serious harmonic pollution to the power grid
(4) After the output voltage of the power supply rises to a certain value, it will break down the air and turn the air into a conductor. The existing technical data shows that it takes about 3kV to break through the air at a distance of 1mm, and the output of the high-frequency high-voltage DC power supply is several From ten kV to hundreds of kV, after air breakdown occurs, the output current changes suddenly and the power supply enters protection. At this time, the filter capacitor of the three-phase rectifier still has high electric energy. If the capacitor cannot be discharged in time, the power supply will be damaged. Threat to system and life safety
[0004] The three-phase rectifier widely used at present is a bridge type uncontrolled rectifier. This rectifier is composed of six diodes. It has the disadvantages of low power factor and uncontrollable output. It cannot overcome the above-mentioned problems when it is directly applied to the above-mentioned high-frequency high-voltage DC power supply.
[0005] Patent US 20090129124 A1 (May 21, 2009) discloses a high-frequency high-voltage DC power supply topology and its control method. The power supply still uses the traditional three-phase bridge uncontrolled rectifier, which also cannot achieve unity power factor correction. and filter capacitor voltage adjustment, but also does not solve the discharge problem of the filter capacitor
[0006] The paper "Electrostatic Precipitator Control Systems" (IEEE Industry Applications Magazine, 2010, 16(4): 28-33.) replaced the three diodes of the upper bridge arm of the three-phase bridge uncontrolled rectifier with silicon controlled rectifiers to achieve a power factor Correction, but the adjustment of the filter capacitor voltage cannot be realized. In the paper, the purpose of adjusting the output voltage is achieved by controlling the switching tube of the rear-stage inverter, but this adjustment method is obviously not flexible enough.
Method used
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Experimental program
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Effect test
Embodiment Construction
[0032] The present invention is used for the three-phase rectifier of high-frequency high-voltage DC power supply (referred to as three-phase rectifier, see figure 1 ) circuit composition is: the first inductor L 1 One end of the three-phase rectifier is connected to the first input port d, and the second inductor L 2 One end of the three-phase rectifier is connected to the second input port e, and the third inductor L 3 One end of the three-phase rectifier is connected to the third input port f; the source of the switching tube Q1, the drain of the switching tube Q2 and the first inductor L 1 The other end of the switch tube Q3, the drain of the switch tube Q4 and the second inductor L 2 The other end of the switch is connected; the source of the switching tube Q5, the drain of the switching tube Q6 and the third inductor L 3 The other end of the switch is connected; the drains of the switch Q1, the switch Q3, the switch Q5, the switch Q7 and the switch Q9 are all connect...
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The invention relates to a three-phase rectifier for a high-frequency high-voltage direct current power source and a control method of the three-phase rectifier. The three-phase rectifier is characterized in that according to a circuit structure of the three-phase rectifier, one end of a first inductor L1 is connected with a first input port d of the three-phase rectifier, one end of a second inductor L2 is connected with a second input port e of the three-phase rectifier, and one end of a third inductor L3 is connected with a third input port f of the three-phase rectifier; a source of a switching tube Q1 and a drain of a switching tube Q2 are connected with the other end of the first inductor L1, and a source of a switching tube Q3 and a drain of a switching tube Q4 are connected with the other end of the second inductor L2; a source of a switching tube Q5 and a drain of a switching tube Q6 are connected with the other end of the third inductor L3; a drain of the first switching tube, a drain of the switching tube Q3, a drain of the switching tube Q5, a drain of a switching tube Q7 and a drain of a switching tube Q9 are connected, and a source of the switching tube Q2, a source of the switching tube Q4, a source of the switching tube Q6 and a source of a switching tube Q8 are connected; one end of a discharge resistor RS is connected with the source of the switching tube Q8, and the other end of the discharge resistor RS is connected with a source of the switching tube Q9.
Description
technical field [0001] The invention relates to a three-phase rectifier for high-frequency high-voltage direct current power supply and a control method thereof. Background technique [0002] High-voltage DC power supply has a wide range of applications, such as medical X-ray machines, industrial electrostatic precipitators, military radar generators, agricultural electrostatic flocking, etc., all of which require high-power, high-frequency high-voltage DC power supplies . [0003] The high-frequency high-voltage DC power supply is mainly composed of a three-phase power supply, a three-phase rectifier, and a high-frequency boost circuit. The three-phase power supply, three-phase rectifier, and high-frequency boost circuit are all connected to the controller. The connection method is as follows: figure 2 shown. The working process of high-frequency high-voltage DC power supply has the following problems: (1) The use of high-frequency devices in three-phase rectifiers and bo...
Claims
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IPC IPC(8): H02M7/217H02M1/42H02M1/36H02M1/32
CPCH02M1/32H02M1/36H02M1/42H02M7/217Y02B70/10
Inventor 杨晓光刘伟民程斌高灵虎祁鹏
Owner ASIC PERCEPTION TECH (TIANJIN) CO LTD
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