To solve such following problem wherein most of conventional brushless DC motors cooling respective CPUs (Central processing Units) like personal computers have disadvantages such as the limit of the current to be run through a motor winding due to current capacity or allowable loss of a driver IC energizing the motor winding or a driving system of driving the motor, which caused insufficient outputs of the brushless DC motors for cooling the CPUs of which the performance has been improved year after year to significantly increase heat generation more and more.
The number of phases of the motor winding is set at two, and a phase difference of currents run through the respective phases is set at 180° or 0°. This brushless DC motor is of full-wave driving type running current through the motor winding 1 in both directions and increases the current to be run through the motor to obtain high motor output.
Tomoyasu Sakaguchi
Hiroki Naito