Notice of Violation of IEEE Publication Principles: Universal MTPA control for permanent magnet synchronous motor drives

Abstract

In contrast with id=0 control, maximum torque per ampere (MTPA) control enables permanent magnet synchronous motor (PMSM) to output a larger low-speed torque and has a better dynamic performance under equivalent capacity. This paper presents a universal maximum torque per ampere torque control algorithm for any type of permanent magnet synchronous motors. Proposed algorithm uses normalized motor parameters with respect to demagnetization characteristic current of a motor, and enables improved control of both surface-mounted and interior permanent magnet synchronous motors by normalizing motor parameters with respect to demagnetize the motor magnet and constructing universal lookup tables, which were deduced under MTPA condition. The proposed controller can be readily used by changing several parameters such as demagnetization current, quadrature and direct inductance of the motor and without changing the table when new type of PMSM is used in the system. A prototype is constructed and applied to a PMSM for electric vehicle, and the experimental results are given to verify the validity of the proposed control strategy.