To achieve higher power and high-efficiency drive for various motors, a new structure of Simple Variable Magnetic Flux Motor (SVMFM) is proposed. SVMFM can control the field magnetic flux automatically by itself according to the torque without any actuator. To confirm the effect on power and efficiency, a prototype motor was experimentally manufactured and evaluated. It is found that the prototype motor could excel in terms of power and efficiency compared with the existing SPM motor.
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