电动液压助力转向系统用BLDCM工作原理及控制策略

Basic principle and control strategy of brushless direct current motor used in electro-hydraulic power steering system

电动液压助力转向系统(EHPS)将传统液压助力转向系统(HPS)中的液压泵改为由变成单独的电机驱动,并根据不同车速和转向盘转速控制等级转速,从而提供可变的转向助力,同时在一定程度上节省了能源的消耗。对POLO轿车装备的EHPS系统的电流无刷电机工作原理进行深入分析,并针对该电机设计控制器及制定相应控制策略,实现对电机转速的控制。

The Electro-hydraulic Power Steering System（EHPS） drives a hydraulic pump with a separate motor,in contrast to the traditional Hydraulic Power Steering System （HPS） doing so by the engine. In this way,EHPS shall be able to provide alterable steering force according to different vehicle speeds and steering wheel ratatioanl speeds ,and to save energy in a more effective way. It mainly discusses the Basic Principle and Control Strategy of the Brushless Direct Current （BLDC） Motor Used in the Electro-hydraulic Power Steering system from POLO,and designs an ECU with control strategy to control the motor.