Title :
A direct torque controller for permanent magnet synchronous motor drives
Author :
Zhong, L. ; Rahman, M.F. ; Hu, W.Y. ; Lim, K.W. ; Rahman, M.A.
Author_Institution :
Sch. of Electr. Eng., New South Wales Univ., Kensington, NSW, Australia
fDate :
9/1/1999 12:00:00 AM
Abstract :
This paper describes an investigation of direct torque control (DTC) for permanent magnet synchronous motor (PMSM) drives. The analysis of PMSMs shows that the increase of electromagnetic torque is proportional to the increase of the angle between the stator and rotor flux linkages and therefore fast torque response can be obtained by increasing the rotating speed of the stator flux linkage as fast as possible. The implementation of DTC in PMSM drives is discussed and the switching table specific for an interior PMSM is derived. The proposed control is implemented on a prototype PMSM, which has a standard induction motor stator, and the experimental results show that the torque response is extremely fast. It is also demonstrated that the position sensor is not essential for the inner torque control loop of PMSM drives with DTC
Keywords :
machine control; magnetic flux; magnetic variables control; permanent magnet motors; rotors; stators; switching; synchronous motor drives; torque control; PMSM drives; direct torque control; direct torque controller; electromagnetic torque increase; fast torque response; inner torque control loop; inverter; permanent magnet synchronous motor drives; position sensor; rotating speed increase; rotor flux linkage; standard induction motor stator; stator flux linkage; switching table; Couplings; Drives; Electromagnetic analysis; Induction motors; Magnetic analysis; Permanent magnet motors; Prototypes; Rotors; Stators; Torque control;
Journal_Title :
Energy Conversion, IEEE Transactions on
