An induction motor including a single rotor formed in one piece and first and second stators disposed side by side has {TAIL ~ a phase changing device} for varying the phase difference between the rotational magnetic field generated by {HEAD ~ the first stator} and that generated by the second stator 
An induction motor including a single rotor formed in one piece and first and second stators disposed side by side has { TAIL ~ a phase changing device } for varying the phase difference between the rotational magnetic field generated by { HEAD ~ the first stator } and that generated by the second stator
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