Abstract
The five-phase fault-tolerant flux-switching permanent magnet (FT-FSPM) motor can offer high efficiency and high fault-tolerant capability. In this paper, its operation principle is presented briefly and its mathematical model is derived. Further, a new adaptive control for an FT-FSPM motor, based on the backstepping method and the sliding mode control strategy, is proposed. According to the backstepping method, the current controllers and voltage control laws are designed to track the speed and minimize the current static error, which enhance the dynamic response and the ability to suppress external disturbances. In order to overcome the influence of parameter variations, according to sliding mode control theory, the virtual control variables and the adaptive algorithm are utilized to approach uncertainty terms. Three Lyapunov functions are designed, and the stability of the closed-loop system is analyzed in detail. Finally, both simulation and experimental results are presented to verify the proposed control method.
Highlights
In recent times, flux-switching permanent magnet (PM) (FSPM) motors have gained considerable attention
This paper proposes a new backstepping sliding mode control (SMC) method for the fault-tolerant flux-switching permanent magnet (FT-FSPM) motors, which can remarkably suppress sliding mode chattering and accurately track the motor speed
It is clear that the model of a FT-FSPM motor has a high nonlinear characteristic, because there exists a coupling between the currents id and iq, and the rotor angular speed ω
Summary
Flux-switching permanent magnet (PM) (FSPM) motors have gained considerable attention. In the stator, these motors have PMs which are easy to cool, reducing the risk of PM demagnetization caused by overheating of the magnets. FSPM motors offer a simple rotor structure and good mechanical integrity [1,2,3,4,5]. They are suitable for high accuracy and high speed operations [6]. By adopting multiphase and fault-tolerant teeth, a five-phase fault-tolerant FSPM (FTFSPM) motor was proposed, exhibiting merits like high fault tolerance and high reliability
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