| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a driving method of a brushless motor in which current consumption of the brushless motor is reduced, by making the efficiency in a low r.p.m. heavy load region improved, and to obtain its drive controller. <P>SOLUTION: A motor current control means 74 calculates control parameters, depending on the difference between the target motor current value and the actual motor current value. A phase control means 76 calculates an operational amount, based on the control parameters thus calculated, operates a lead angle, from the relation between a previously designed operational amount and the lead angle, based on the calculation amount thus calculated, and then corrects the conduction phase angle of a drive circuit 72 which is set, based on the motor current signal by the information of the lead angle thus calculated. <P>COPYRIGHT: (C)2007,JPO&INPIT |
