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1. (WO2017186028) PROTECTION CIRCUIT AND SYSTEM OF ELECTRONIC CONTACTOR

Pub. No.:    WO/2017/186028    International Application No.:    PCT/CN2017/080923
Publication Date: Fri Nov 03 00:59:59 CET 2017 International Filing Date: Wed Apr 19 01:59:59 CEST 2017
IPC: H03K 17/08
H02H 9/04
Applicants: ZTE CORPORATION
中兴通讯股份有限公司
Inventors: SHANG, Yun
尚云
Title: PROTECTION CIRCUIT AND SYSTEM OF ELECTRONIC CONTACTOR
Abstract:
A protection circuit and system of an electronic contactor. A power input end of a switch tube (1) of an electronic contactor is connected with a positive end of a power source, and a power output end is connected with a negative end of the power source by means of a load (3); a drive signal access terminal is connected with an output end of a driver circuit (2), and a first voltage absorbing circuit (4) of a protection circuit is connected with the power input end and power output end of the switch tube (1), respectively; when the switch tube (1) is controlled by a drive signal to turn off, the first voltage absorbing circuit (4) is connected with the positive end of the power source, and is connected with the negative end of the power source by means of the load (3) to form a charging circuit. At such time, a voltage between the power input end and the power output end of the switch tube (1) is absorbed and charged, that is, the peak voltage between the power input end and power output end of the switch tube (1) is absorbed so as to prevent the peak voltage from causing damage to the switch tube (1), thereby reducing the usage costs and improving the safety and stability of circuit controls.