In this paper, a new approach to a sensorless speed control and an initial rotor position estimation for a salient pole Permanent Magnet Synchronous Motor (PMSM) drive is presented. At a rotating consition, speed and rotor position estimation of PMSM drive are obtained through an Extended Kalman Filter (EKF) algorithm by only measuring the phase voltages and motor currents. The main difficulty in developing an EKF for a salient pole PMSM is caused by the complexity of the dynamic model expressed in the stationary coordinate system. This model is more complicated than that of the surface PMSM, resulting from the assymetry of the magnetic circuit. The starting procedure is a problem under sensorless drives, because no information is available before starting. The initial rotor position is estimated by the current response of the voltage pulse, which is intermittently applied to the motor at standstill. To illustrate our work, we present experimental results for a salient pole PMSM obtained on a floating-point Digital Signal Processor (DSP) TMS320C31/40 MHz based control system.
| Filename: | EPE Journal - 11-3 - 1 - Paper Boussak |
| Filesize: | 1.266 MB |
