Driving circuit for high-voltage solid switch

Abstract

The invention discloses a driving circuit for a high-voltage solid switch, which comprises a first control circuit, a coupled circuit and a second control circuit, wherein the first control circuit is used for conducting signal modulation on an initial control signal to generate a first control signal; the first control signal is a signal with adjustable conduction width; the coupled circuit is connected with the first control circuit, and used for coupling the first control signal to generate a coupled control signal; and the second control circuit is connected with the coupled circuit, and used for conducting signal adjustment on the coupled control signal to generate a trigger signal driving the high-voltage solid switch. With the adoption of the driving circuit, mutual insulation between the driving circuits at different levels and protection to a control end are achieved; the insulation of the driving circuit for the high-voltage solid switch is achieved; a driving structure is simplified; and a guarantee is provided for safe operation of the high-voltage solid switch.

Description

technical field [0001] The invention relates to the field of control circuits, in particular to a driving circuit for high-voltage solid state switches. Background technique [0002] The high-voltage solid-state switch is composed of multi-level power MOSFET tubes or insulated gate bipolar transistors (IGBT) in series. The difficulties include the design of drive energy supply, drive synchronous trigger, inter-stage insulation, and static and dynamic voltage equalization. Therefore, a well-designed drive circuit power supply, synchronous triggering of drive circuits, mutual insulation of all levels of series drive circuits, and static and dynamic voltage equalization between series power electronic devices are the prerequisites to ensure the stable and safe operation of high-voltage solid state switches. [0003] The driving circuit of the high-voltage solid-state switch mainly completes the power supply, the synchronous triggering of multi-stage series series and the mutual...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem of large volume and high cost of using optical fiber for electromagnetic triggering in the related art, no effective solution has been proposed at present. Therefore, the main purpose of the present invention is to provide a driving circuit for high-voltage solid state switches to solve the above problems

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