Abstract:
This project describe mathematical method which look for optimized electromagnetic torque with reduced ripple in both single-phase and two-phase brushless dc motor with special rotor construction. The conventional two phase two – pulse brushless dc motor requires special construction with aim to realize successful starting and ensuring relatively constant torque independent of the rotor position, there method are described:
1- Pulse width modulation (PWM) control strategy with skewed stator poles, which introduce unsymmetrical airgap magnetic, permance and thus additional reluctance torque eliminated low-order current harmonics.
2- PWM control strategy with symmetrical stator poles and shorted coil pitch.
3- Combined PWM and continuous control signal energized two-phase three – winding motor and unsymmetrical rotor construction, where it is expected producing electromagnetic torque with reduced ripples and increasing stability , independent of the rotor position.
Description:
no of pages 160, 18316, هندسة حاسوب 13/2005 , in the store
