Inductive load transient phenomena circuit, when the power supply is suddenly cut off, and instantly across the inductor to form a high kickback voltage

Inductive loads such as motors in life and is widely used in production, and inductive load in the circuit is in the "on" or "off" time will produce a high voltage spark discharge is also generated. Therefore, this paper first inductive load transient phenomena in order to analyze, and then propose the use of "contact  mcb circuit breaker " approach to reduce the noise  mcb circuit breaker  contacts and load, while extending the service life of contacts. Inductive load transient phenomena circuit, when the power supply is suddenly cut off, and instantly across the inductor to  electric transformer  voltage. Bridge rectifier diode breakdown; bridge rectifiers plastic deformation at the micro-switch; bridge rectifier micro switch catching; coil burning; micro switch cover cracked. Electromagnetic contactor for the three-phase AC contactor is mainly used to control the locomotive of the auxiliary motor work. Its low voltage coil control part of the bridge rectifier for the AC-DC dual-use design.