| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a controller of brushless DC motor, capable of suppressing variations in a motor output due to variations in the magnetic flux of a brushless DC motor. <P>SOLUTION: The controller of brushless DC motor includes: an inverter circuit 9; applied voltage detection means 10 that detects an applied voltage of a brushless DC motor 1; current detection means 11 that detects an electric current supplied to the brushless DC motor 1; output control means 12 that controls the inverter circuit 9 based on a supplied current and an applied voltage detected so that the brushless DC motor 1 achieves a desired output; and correction means 13 that detects an induced voltage and an electrical angular speed simultaneously with the detection of the supplied current of the brushless DC motor 1, changes an applied voltage as a reference previously stored in the output control means 12 or a control parameter of a duty having a proportional relationship to the applied voltage according to detection results of the induced voltage and the electrical angular speed, and that corrects variations in the magnetic flux of the brushless DC motor 1. <P>COPYRIGHT: (C)2012,JPO&INPIT |
