| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a highly reliable motor controller by a novel system of induction voltage feedback control requiring no mechanical electromagnetic pickup sensor. <P>SOLUTION: The motor controller comprises a DC/AC converting means for supplying a three-phase brushless DC motor with an AC voltage produced by converting a DC voltage by a switching element, a means for detecting the induction voltage of the motor, a voltage control 1 means outputting a voltage waveform 1 based on its pole position, a PWM control means for converting the voltage waveform 1 into a PWM signal, an induction voltage selecting means for selecting (6-n) pole positions during an electric angle 1 period and outputting a pole position selection, and a voltage control 2 means for outputting a voltage waveform 2 to the PWM control means based on the pole position selection. The voltage control 2 means has a phase setting means for outputting a specified voltage waveform 2 in n unselected time domains and controlling the phase angle of the AC voltage based on the pole position and the pole position selection. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
