| 摘要 |
PURPOSE: A DC motor for dual stator structure is provided to prevent heat or noise caused due to remanent magnetic flux of a stator by avoiding polar change of a rotor during rotation of the rotor. CONSTITUTION: A DC motor comprises a dual stator constituted by main stators(20) protruded to be symmetric to each other and a sub stators(20-1) axially spaced apart from the main stator; a rotor(30) forming a symmetric path of magnetic flux excited from the dual stator; a field winding(40) wound to allow the main stator to have a predetermined polarity and the sub stator to have a polarity opposite to the main stator; and a sensor(60) arranged at the main body of the motor. The dual stator is dually tapered so as to obtain a concentrated magnetic flux. The sensor includes an off-sensor for turning off the field winding, and on-sensors for turning on the field winding. The off-sensor and on-sensor are spaced from each other along the periphery of the motor. The rotating velocity of the rotor is determined by one of the on-sensors.
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