| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that in the conventional wide-angle power supply control, induced voltage values stored in a microcomputer for each of the motor, revolution speed, and current phase conditions as reference values for detecting a position are used, but since instantaneous values of the induced voltage are affected not only by the position of a rotor, but also by the specifications of the motor, revolution speed, load, and current phase, the conventional control unit is incapable of coping with unexpected irregular cases, and also lacking in stability against a sudden changes. SOLUTION: The initial value of a position detection reference voltage is made a half level of a PN voltage (zero reference), and when detection of the zero reference becomes difficult due to the phase of power being cut off, control to automatically change the position detection reference voltage and a conducting angle is made through calculations. |
