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Saliency investigation of switched-flux PM brushless AC machine for saliency-tracking-based sensorless control
conference contribution
posted on 12.09.2017, 11:57 authored by Tzu-Chi Lin, L.M. Gong, Zi-Qiang ZhuThis paper investigates the saliency in switched-flux
permanent-magnet (SFPM) brushless AC (BLAC) motors. In
order to use the method of high-frequency pulsating vector
voltage carrier signal injection-based sensorless control
techniques, the machine saliency is essential. However, the
machine saliency behavior is complicated in real SFPM
machines since it is dependent on the load condition.
Furthermore, there may exhibit multiple saliencies due to the
non-sinusoidal spatial distribution of machine reluctance.
Saliency ratio and feasible region are usually used to describe
the machine saliency level. It varies with fundamental excitation
due to the magnetic saturation. Two simplified experimental
procedures are employed for practical testing of saliency
investigation in this paper, which could easily measure and
obtain the machine saliency information without any knowledge
of machine parameters. The experimental results show that the
prototype machine has both primary and secondary (multiple
saliencies) saliencies. The performance of rotor position
estimation is implemented based on sensorless control at low and
zero motor speed.
History
School
- Mechanical, Electrical and Manufacturing Engineering