Title :
A direct torque controlled interior permanent magnet synchronous machine drive with compensation of the forward voltage drops of the power switches
Author :
Tang, Lixin ; Rahman, Muhammed F.
Author_Institution :
Sch. of Electr. Eng. & Telecommun., New South Wales Univ., Sydney, NSW, Australia
Abstract :
The direct torque control (DTC) scheme is a new control scheme based on space vector theory. However, at low speed, the performance is not very good. The effect of forward voltage drop on DTC performance at low speed is analyzed and compensated in this paper. Modeling results show that the blindness to the forward voltage drop of the power switches may cause oscillation in the flux and torque of the machine. A simple compensation scheme is proposed and used in experiment to solve the problem. Better low speed performance has been observed with the compensated DTC IPMSM drive system.
Keywords :
compensation; machine control; magnetic flux; oscillations; parameter estimation; permanent magnet motors; switches; synchronous motor drives; torque control; DSI 102 DSP card; IGBT inverter; direct torque control; flux linkage estimation; flux oscillation; forward voltage drops compensation; interior PMSM drive; interior permanent magnet synchronous machine drive; parameter estimation; power switches; space vector theory; torque oscillation; Hysteresis; Inverters; Magnetic sensors; Permanent magnet machines; Sampling methods; Stators; System performance; Telecommunication control; Torque control; Voltage control;
Conference_Titel :
Industry Applications Conference, 2003. 38th IAS Annual Meeting. Conference Record of the
Print_ISBN :
0-7803-7883-0
DOI :
10.1109/IAS.2003.1257567
