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Three-level direct-current chopper circuit topology for space

A chopper circuit and flat technology, which is applied in the topology of a three-level DC chopper circuit for space and its control field, can solve the problems of electronic switches and energy storage devices cost increase.

Active Publication Date: 2016-01-27
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The direct-to-direct converter is an important part of the energy conversion device of the space power station. With the increase of power level, it must develop along the direction of medium voltage to reduce the transmission quality of the line and improve the power generation efficiency. However, the high bus voltage makes the electronic switch , The cost of energy storage devices has increased significantly

Method used

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  • Three-level direct-current chopper circuit topology for space
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  • Three-level direct-current chopper circuit topology for space

Examples

Experimental program
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Embodiment 1

[0048] figure 1 Shown is Example 1 of the present invention. Such as figure 1 As shown, the topology of the three-level DC chopper circuit of the present invention consists of the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, the first energy storage inductor L1, the second energy storage inductor L2, the first Composed of electronic switch K1, second electronic switch K2, third electronic switch K3, fourth electronic switch K4 and first diode D1; the first lead-out terminal of the first capacitor C1, the first lead-out terminal of the first electronic switch K1 It is connected to the first lead-out terminal of the first diode D1 at the first connection point 1, the second lead-out terminal of the first diode D1, the first lead-out terminal of the second energy storage inductor L2, and the first lead-out terminal of the second capacitor C2 One lead-out terminal is connected at the second connection point 2, the second lead-out ...

Embodiment 2

[0057] Figure 13 Shown is Example 2 of the present invention. The topology of the three-level DC chopper circuit of the present invention consists of the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, the first energy storage inductor L1, the second energy storage inductor L2, and the first electronic switch K1 , the second electronic switch K2, the third electronic switch K3, the fourth electronic switch K4, the first diode D1 and the second diode D2; the first electronic switch K1, the second electronic switch K2, the third electronic switch K3 and the fourth electronic switch K4 are fast semiconductor devices with controllable on and off; the first lead-out terminal of the first capacitor C1, the first lead-out terminal of the first electronic switch K1 and the first lead-out terminal of the first diode D1 The terminals are connected at the first connection point 1, the second lead-out terminal of the first diode D1, the firs...

Embodiment 3

[0059] Figure 14 Be embodiment 3 of the present invention. The three-level DC chopper circuit topology of the present invention consists of a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first energy storage inductor L1, a second energy storage inductor L2, and a first electronic switch K1, the second electronic switch K2, the third electronic switch K3, the fourth electronic switch K4 and the first diode D1 and the second diode D2; the first electronic switch K1, the second electronic switch K2, the third electronic switch The switch K3 and the fourth electronic switch K4 are fast semiconductor devices with controllable on and off; the first lead-out terminal of the first capacitor C1, the first lead-out terminal of the first electronic switch K1 and the first lead-out terminal of the first diode D1 The lead-out terminal is connected at the first connection point 1, and the second lead-out terminal of the first diode D1, the firs...

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Abstract

The invention relates to a three-level direct-current chopper circuit topology for space. The topology is composed of a first capacitor (C1), a second capacitor (C2), a third capacitor (C3), a fourth capacitor (C4), energy storage inductors (L1 and L2), a first electronic switch (K1), a second electronic switch (K2), a third electronic switch (K3), a fourth electronic switch (K4), a first diode (D1), a second diode (D2), and a third diode (D3). With adjustment of connection and disconnection of the first electronic switch (K1), the second electronic switch (K2), the third electronic switch (K3), the fourth electronic switch (K4), charging and discharging control of the second capacitor (C2) and the third capacitor (C3) is carried out respectively, so that the voltage balance of the second capacitor (C2) and the third capacitor (C3) is guaranteed and input-output direct-current-to-direct-current conversion is realized by a three-level way and thus the device stress of the electronic switches and the intermediate suspension capacitor is reduced.

Description

technical field [0001] The invention relates to a topology of a three-level DC chopper circuit for space and a control method thereof, in particular to a topology of a three-level DC chopper circuit for space. Background technique [0002] As the world's energy supply and demand conflicts and environmental protection issues become increasingly prominent, extensive research on space solar power plant technology has been carried out internationally. At present, dozens of conceptual schemes have been proposed, and key research has been carried out on key technologies such as wireless energy transmission. In recent years, the power generation efficiency of solar cells, microwave conversion efficiency and related space technologies have made great progress, laying a good foundation for the development of future space solar power plants. [0003] With the further development of solar power plants in the future, its power level will inevitably need to be further improved. At presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/10
Inventor 尹靖元霍群海吴理心朱晋韦统振
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI