Real-time protection device for multi-path full-bridge inversion module

Abstract

The invention discloses a real-time protection device for a multi-path full-bridge inversion module. The real-time protection device comprises a plurality of real-time current detection modules, a current parallel module and a protection driving module, wherein the real-time current detection modules are used for detecting a current of a source of a first insulation grid bipolar transistor, the current parallel module is used for converting the currents output from the plurality of real-time current detection modules to voltages to be in parallel connection, the protection driving module comprises a comparator and a driving control unit, the voltages in parallel connection is sent to the comparator, an output signal of the comparator is sent to the driving control unit, and the driving control unit generates a grid input signal of the full-bridge inversion module. In the real-time protection device, an overcurrent protection circuit is not needed to be additionally arranged in each full-bridge inversion module, real-time detection on the current of the multi-path full-bridge inversion module can be achieved, the circuit is simple, and the working efficiency and the stability are effectively improved.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a real-time protection device for a multi-channel full-bridge inverter module. Background technique [0002] Most of the existing medical X-ray machines use full-bridge inverter modules as the main inverter. With the development of X-ray machines, the output power of X-ray machines has increased from several kilowatts to hundreds of kilowatts. In order to meet the power requirements of the whole machine, it is necessary to Multiple full-bridge inverter modules can work in parallel to meet the requirements. In order to ensure the safe operation of the full-bridge inverter module, it is necessary to add an overcurrent protection circuit to each full-bridge inverter module, resulting in cumbersome protection circuits, poor stability, and insufficient dynamic response speed. . Contents of the invention [0003] Purpose of the invention: The purpose of the present invention is to p...

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Problems solved by technology

[0002] Most of the existing medical X-ray machines use full-bridge inverter modules as the main inverter. With the development of X-ray machines, the output power of X-ray machines has increased from several kilowatts to hundreds of kilowatts. In order to meet the power requirements of the whole machine, it is necessary to Multiple full-bridge inverter modules can work in parallel to meet the requirements. In order to ensure the safe operation of the full-bridge inverter module, it is necessary to add an overcurrent protection circuit to each full-bridge inverter module, resulting in cumbersome protection circuits, poor stability, and insufficient dynamic response speed.

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