J. Deur

Vector Control of Permanent-Magnet Synchronous Motor in Wide Speed Range

Automatika, Vol 36, No. 1-2, pp. 27-33, 1995.
Vector control of permanent-magnet synchronous motor includes independent torque and air-gap control and can be realized by feedback control of current vector components in a rotor reference frame. The paper presents the optimization of current vector in a steady state taking into account inverter current and voltage limits. The criterion of minimum current for given speed and torque is used as optimal criterion. Two algorithms for current reference vector generation based on optimized results have been developed and compared. The algorithms differ only in the speed range above the base speed (flux-weakening region). The first algorithm is based on feedforward and the second on feedback armature voltage control. The behavior of vector control system is examined by simulation.