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Bidirectional H-bridge IGBT solid-state circuit breaker

A solid-state circuit breaker, branch circuit technology, applied in circuit devices, emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc. Effect

Inactive Publication Date: 2020-07-31
GUANGDONG FULLDE ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since there is no such product in the market at present, research and development of this microsecond-level fast turn-off solid-state circuit breaker has begun at home and abroad.

Method used

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  • Bidirectional H-bridge IGBT solid-state circuit breaker
  • Bidirectional H-bridge IGBT solid-state circuit breaker
  • Bidirectional H-bridge IGBT solid-state circuit breaker

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Embodiment Construction

[0057] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments and accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0058] The bidirectional H-bridge IGBT solid-state circuit breaker scheme of this embodiment is as follows Figure 5 As shown, it consists of four sets of diode components and one set of IGBT clusters.

[0059] Each group of diode components is provided with a plurality of diodes with the same conduction direction connected in series. The component where the diodes D1-D3 are located is the diode component L1, the component where the diodes D4-D6 are located is the diode component L2, the component where the diodes D7-D9 are located is the diode component L3, and the com...

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Abstract

The invention relates to a bidirectional H-bridge IGBT solid-state circuit breaker with high overcurrent capacity. The bidirectional H-bridge IGBT solid-state circuit breaker comprises: four diode branch circuits L1, L2, L3 and L4, wherein the diode branch circuit L1 and the diode branch circuit L2 are connected in the same conduction direction to form a branch circuit J1, the diode branch circuitL3 and the diode branch circuit L4 are connected in the same conduction direction to form a branch circuit J2, and the branch circuit J1 and the branch circuit J2 are reversely connected in parallel;and an IGBT cluster provided with a plurality of IGBT devices which are connected with one another, wherein one end of the IGBT cluster is connected to one contact between the branch J1 and the branch J2, and the other end of the IGBT cluster is connected to the other contact between the branch J1 and the branch J2. The bidirectional H-bridge IGBT solid-state circuit breaker has the advantages ofbeing high in overcurrent capacity, high in efficiency, high in current breaking capacity, few in switching elements and short in protection time, and can achieve microsecond-level reliable turn-offwithin 100 microseconds.

Description

technical field [0001] The invention relates to the field of DC power grid fault protection, in particular to a bidirectional H-bridge IGBT solid-state circuit breaker. Background technique [0002] Different from the traditional AC power grid, when a short circuit occurs in the DC power grid, because there is no voltage zero-crossing point, the conventional circuit breaker cannot instantly shut off the large DC current for fault protection. Therefore, the bidirectional DC solid state circuit breaker came into being. The developing DC power grid Network, especially the comprehensive power system of ships, cannot be separated from the application of bidirectional DC solid-state circuit breakers with high voltage and high power that can be turned off quickly. [0003] In recent years, most of the bidirectional DC solid-state circuit breakers successfully developed at home and abroad are hybrid circuit breakers, and the turn-off time is generally above 3 milliseconds, which is ...

Claims

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Application Information

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IPC IPC(8): H02H7/26H02H9/04
CPCH02H7/262H02H7/268H02H9/04
Inventor 李稳根廖晓斌
Owner GUANGDONG FULLDE ELECTRONICS
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