Formation and Suppression of Interference Pulses of Automobile Electric Door Locks Design ●Research Excellent Column Design of Hunan Provincial Journals●Study on the Formation and Suppression of Interference Pulses of Automobile Electric Door Locks Xin Changyu, Li Zhigang, Chen Rihong (Lianchuang Automotive Electronics Co., Ltd., Shanghai 201206) Abstract: Combined with the failure found in engineering practice that the door lock motor generates interference pulses and causes the internal chip of the electronic module to burn out, the formation mechanism of the transient emission conducted by the door lock motor is analyzed, the cause of the pulse on the grounding line is explained, and a solution is proposed, which has certain guiding significance for the design of the electric door lock drive circuit. Keywords: door lock motor; electromagnetic compatibility (EMC); conducted transient emission (CTE); metastable state Document code: U463.834 Document identification code: A Article number: 1003-8639 (2011 )01-0005-03For m ing and Suppr ession of Inter fer ence Pulse of Automotive Electr ic Door LockXIN Chang-yu , LI Zhi-gang , CHEN Ri-hong(DIAS Automotive Electronics Systems Co. , Ltd. , Shanghai 201206 , China )Abstract: Based on the trouble found in engineering practice, the author analyzed the forming mechanism of conduction transient emission of door lock motor, explained why pulse came into being on grounding line, propos……
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