| 摘要 |
PROBLEM TO BE SOLVED: To start a brushless motor surely and smoothly in spite of its large load, in its starting control. SOLUTION: In a controlling circuit 10 of a brushless motor 4, positioning of its rotor is performed prior to its starting sequence. In the case of utilizing the brushless motor 4 as the motor for a compressor, sensing its load state by the discharging and suction temperatures of the compressor, its positionings of plural times are performed responding to its load state. When its load is large, performing its positioning processings of two or more plural times. its rotor is brought by its reverse rotation into the side just preceding the start of its starting sequence (i.e., the timing position of its last current application) to perform the sure and smooth start of its rotor from the initial time of its starting sequence. |
