关键词: 电泳 IGBT 整流电源；加电控制系统优化；电泳漆膜厚度监测

Abstract: This article focuses on the control system of the rectifier power for the electrophoretic in the automotive painting. It deeply analyzes the existing weaknesses of the current domestic systems, such as the control method single for power-supply to the body, the lack of a function for monitoring the thickness of the paint film, and the imperfect grounding protection. In response to these issues, the power-supply control function of the insulated gate bipolar transistor (IGBT) is optimized from the dimensions of the power-supply time node, the power-supply intensity and control type, the power-supply action mode, and the body zonal power-supply. An online monitoring method for the thickness of the paint film based on Ampere-minutes and an improved grounding protection and grounding current monitoring scheme are proposed. Through these improvements, the performance of the rectifier power control system can be significantly enhanced, meeting the requirements of flexible production in automotive electrophoretic coating and ensuring the body process quality.

Key words: electrophoresis IGBT rectifier power; power-supply control system optimizing; electro-phoretic paint film thickness monitoring