Mtpa and Flux Weakening Control of Permanent Magnet Synchronous Motor for Electric Vehicle

Abstract

In order to meet the wide application of current new energy vehicles, to break through the past vehicle battery technology, effective and reasonable drive control system is very important to improve the endurance of the vehicle. The key technology of permanent magnet synchronous motor control system for electric vehicles is studied. The maximum torque per ampere (MTPA) control of constant torque zone and constant power region weak magnetic control is discussed. A set of drive control system of permanent magnet synchronous motor for electric vehicle is developed based on 32-bit high performance micro processing chip TriCore1782. It has the peak power of 50kW, peak speed of 7000r/min, peak rotation of 160N.m. The motor drive control system determines whether the electric vehicle can operate safely and reliably, and it is the core of the drive system. The drive system should have good torque control ability, high reliability and as high efficiency as possible in the range of speed regulation. Therefore, the development of highperformance motor drive control system has important engineering practice and guiding significance.