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In permanent magnet synchronous motor (PMSM) servo systems, the saliency ratio is an important factor in sensorless control and flux-weakening control. Compared with the interior PMSM (IPMSM) with distributed windings, the IPMSM with concentrated windings gains more popularity in servo system applications. However, the saliency ratio of current fractional slot concentrated windings (FSCWs) IPMSM is...
A sensorless control scheme of synchronous reluctance motor (SynRM) drives is presented using the balanced 3-phase carrier frequency component of a PWM inverter. SynRM has inherent rotor saliency and its position is estimated from alpha and beta carrier current component and the appropriate signal demodulation. The improved method of restraining d-axis current is proposed to reduce estimation error...
A comparing study is done for interior permanent magnet synchronous motors (IPMSM) with different pole and slot combinations. The effect on winding factor, electromagnetic torque components, salient ratio, cogging torque and torque ripple for different pole and slot combinations are calculated. The characteristics of torque performance, losses and demagnetizing ability for different slots per pole...
In this paper, the configuration and operating principle of the electromagnetic heater is presented, analytical method is applied to discuss the effects of electromagnetic and structural parameters of electromagnetic heater on the produced heating and the designing method of electromagnetic heater is discussed. On the basis of theoretical analysis, the prototype is developed and an experimental method...
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