Abstract
This paper carries on the research on the sensorless control of dual three-phase (DTP) permanent magnet motor (PMSM) at low speed. If the high frequency voltage signal is injected into one set of three-phase stator windings, it can achieve well sensorless control. The high frequency mathematical model of DTP PMSM is obtained from dual d-q synchronous frames theory. One high frequency cosine signal voltage is injected into the γ axis of the ABC windings. The rotor position error is estimated from the high frequency current responses. The experiments results are carried on for the verification of the designed sensorless control method.
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