| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor controller in which high speed performance is realized at a level equivalent to sine wave 180° conduction with a positional sensor while ensuring stability of control without requiring an accessory circuit required for conventional 180° conduction by a novel induction voltage feedback control system requiring no mechanical electromagnetic pickup sensor. <P>SOLUTION: Optimal induction voltage means are provided, respectively, for the output voltage control region and the current phase control region of a DC brushless motor. Speed control of the motor is carried out by shifting the motor control method when rotation of the motor reaches the optimal switching conditions of each region. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
