very fast field oriented control for permanent magnet hysteresis synchronous motor

in this paper, a new field oriented control scheme with maximum torque for permanent magnet hysteresis synchronous (pmhs) motor has been presented. vector control method provides significant improvement to the dynamic performance of ac motors but in this method d- axis current is controlled such as the ratio of motor torque to motor current is a maximum, then the dynamic performance will be very fast. furthermore, d and q axis currents are limited such as stator winding currents remain in the allowed range. feedback method is used for the decoupling the torque-current component from the fluxcurrent component so these two components can be independently controlled. simulation results for the motor are given and test results validate the theoretical performances.