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A spatial high-voltage high-frequency high-power interleaved three-level PFC converter and method

A high-voltage, high-frequency, and high-power technology, applied in the field of space high-voltage, high-frequency, and high-power interleaved three-level PFC converters, can solve problems such as affecting system stability and inductance that cannot be excessively reduced, so as to reduce voltage and current. Stress and inductance volume, reduce current stress, improve the effect of zero-crossing distortion

Active Publication Date: 2018-12-14
SHANGHAI INST OF SPACE POWER SOURCES
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Problems solved by technology

Moreover, in practical applications, the inductance cannot be excessively reduced, otherwise it will affect the stability of the entire system

Method used

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  • A spatial high-voltage high-frequency high-power interleaved three-level PFC converter and method
  • A spatial high-voltage high-frequency high-power interleaved three-level PFC converter and method
  • A spatial high-voltage high-frequency high-power interleaved three-level PFC converter and method

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Embodiment Construction

[0037] The present invention provides a space high-voltage, high-frequency, high-power interleaved three-level PFC converter and method. In order to make the present invention more obvious and understandable, the present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0038] Such as figure 2 As shown, the space high-voltage high-frequency high-power interleaved three-level PFC converter of the present invention includes: four high-power fast recovery diodes D1, D2, D3, D4, input filter capacitor C1, two boost inductors L1, L2 , four power switch tubes S1, S2, S3, S4, freewheeling diodes D5, D6, D7 and two output capacitors C2, C3.

[0039] The high-power fast recovery diodes D1, D2, D3, and D4 together form a rectifier bridge. The high-power fast-recovery diode D1 and the high-power fast-recovery diode D3 are connected in series to form a branch, and the high-power fast-recovery diode D2 and the hi...

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Abstract

The invention discloses a spatial high-voltage high-frequency high-power interleaved three-level PFC converter and method thereof, the converter comprising four high-power fast recovery diodes, an input filter capacitor C1, two boost inductors, four power switching transistors, three freewheel diodes and two output capacitors; The circuit topology skillfully combines the interleaved parallel PFC technology with the three-level PFC technology, The input current ripple after interleaved parallel connection is smaller than that of three-level PFC of a single branch. The branch current is approximately half the input current, thus the current stress of the switching device is reduced, and the voltage stress of each switching device is also reduced by half, which provides a powerful technical support for the research of the high-power PFC converter. The voltage and current stress and the inductance volume of the switching device of the converter are reduced as much as possible while the zero-crossing distortion of the input current is improved.

Description

technical field [0001] The invention belongs to the field of AC / DC conversion, and particularly designs a space high-voltage, high-frequency, high-power interleaved three-level PFC converter and a method. Background technique [0002] With the increasing difficulty of deep space exploration missions, the design requirements for spacecraft power systems are more stringent. Under the premise of ensuring the specified volume and weight of the power system, it is also necessary to make the power system achieve high reliability and high power density. In order to reduce the bus current and cable power loss of the power system, the distributed power system based on the AC bus architecture has gradually attracted people's attention. [0003] In the high-voltage and high-frequency AC bus power system, there is inevitably large harmonic interference. A large number of harmonic currents will not only bring great difficulty to the design of the power system, but also affect the conver...

Claims

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Application Information

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IPC IPC(8): H02M7/23H02M7/25H02M1/42
CPCH02M1/4225H02M7/23H02M7/25Y02B70/10
Inventor 靳洋刘世超李阳吴春瑜何小斌黄军
Owner SHANGHAI INST OF SPACE POWER SOURCES
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