New Autonomous Sensorless Technique for Five Phase Permanent Magnet Motor Drive System From Perspective of Flux Intensifying Effect and ADRIL Observation

The motor parameter variation and complex harmonic interference will seriously affect the sensorless control performance. Most previous sensorless techniques target improving estimation performance from the perspective of the control algorithm, which increases the complexity of the entire drive system and is difficult to ensure the superior multiple sensorless operating performance. In this study, a solution to the aforementioned problems is devised by developing a new autonomous sensorless technique from the perspective of the motor drive system. First, based on the analysis of the influence of parameter variation on rotor position observation, a five-phase flux-intensifying fault-tolerant interior permanent magnet (FI-FTIPM) motor with the design concept of “magnetic-barrier guidance” is innovatively put forward, which can effectively suppress the parameter variation caused by saturation effect. Second, a sensorless control algorithm based on a new active disturbance rejection iterative learning (ADRIL) observation is proposed, which can suppress harmonic disturbance and further improve the accuracy of sensorless observation. Finally, the experimental results verify the effectiveness of the proposed strategy.