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

摘要： 文章聚焦于汽车涂装电泳整流电源控制系统，深入剖析当前国内系统存在的短板，如 车身加电控制方式单一、缺乏漆膜厚度监测功能、接地保护不完善等。针对这些问题，从加 电时间节点、加电强度及控制类型、加电动作方式、车身分区加电等维度对绝缘栅双极型晶 体管（IGBT）加电控制功能进行优化，提出基于安培分钟数的漆膜厚度在线监测方法，以及 改进的接地保护与接地电流监测方案。通过这些改进，可显著提升整流电源控制系统性能， 满足汽车电泳涂装柔性化生产及保障车身工艺质量的需求。

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