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Economical isolated high-voltage DC switching circuit

A high-voltage DC, switching circuit technology, applied in the direction of converting DC power input to DC power output, electrical components, electronic switches, etc., can solve the problem of high price of DC contactors, achieve enhanced flexibility and reliability, strong cost-effective advantages, small scale effect

Pending Publication Date: 2019-09-24
上海鼎充新能源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, DC contactors are widely used in the market to realize the switching of high-power and high-voltage DC, but the price of DC contactors is relatively high.

Method used

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  • Economical isolated high-voltage DC switching circuit

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Embodiment Construction

[0014] Such as figure 1 As shown, the present invention includes an IGBT drive circuit 1 and a power circuit 2 connected in series on a high voltage direct current circuit.

[0015] The power circuit 2 includes a positive input terminal VIN+, a positive output terminal VOUT+, a negative input terminal VIN-, a negative output terminal VOUT-, control switches K1, K2, K3, and an IGBT module Q1. The control switch K3 is connected in series with the negative input terminals VIN-, Between the negative output terminal VOUT-, the control switches K2 and K1 are connected in series between the positive input terminal VIN+ and the positive output terminal VOUT+, and the C pole and E pole of the IGBT module Q1 are connected in parallel to both ends of the control switch K2 .

[0016] As a further description of this embodiment, the control switches K1 , K2 , and K3 described in this embodiment all use, but are not limited to, magnetic latching contactors.

[0017] The IGBT drive circuit...

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Abstract

The invention discloses an economical isolated high-voltage DC switching circuit, and belongs to the technical field of circuit control. The circuit comprises an IGBT driving circuit and a power circuit connected to a high-voltage DC circuit in series, and the power circuit comprises control switches K1, K2 and K3 and an IGBT module Q1, wherein the control switch K3 is connected to a negative input end VIN- and a negative electrode output end VOUT-. The control switch K2 and the control switch K1 are connected in series between a positive input end VIN+ and a positive output end VOUT+, and the C and E poles of the IGBT module Q1 are connected in parallel to the two ends of the control switch K2; and the IGBT driving circuit is connected with the IGBT module Q1. The circuit is small in scale, the driving circuit and the power circuit are completely isolated, and the circuit can work safely and reliably for a long time, so the circuit is particularly suitable for serving as a power distribution unit circuit of a charging pile, and the flexibility and reliability of charging can be greatly enhanced.

Description

technical field [0001] The invention belongs to the technical field of circuit control, in particular to an economical isolated high-voltage direct current switching circuit. Background technique [0002] At present, DC contactors are generally used in the market to realize the switching of high-power and high-voltage DC, but the price of DC contactors is relatively high. For some industrial electrical equipment used on a large scale, under the premise of satisfying safety, cost performance is the key factor to improve competitiveness. Contents of the invention [0003] The purpose of the present invention is to provide an economical isolated high-voltage DC switching circuit, which can effectively solve the problems in the background technology, [0004] The technical solution to achieve the above purpose is: an economical isolated high-voltage DC switching circuit, including an IGBT drive circuit and a power circuit connected in series to the high-voltage DC circuit. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H03K17/081H03K17/567
CPCH02M3/33523H03K17/08116H03K17/567
Inventor 董冰陈建华陈盼吕柱柱杨沛宇刘奔黄戬田绍民
Owner 上海鼎充新能源技术有限公司