| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method of controlling a sensorless blushless (BL) DC motor, capable of preventing nonuniform ZCP detection by changing a reference voltage inputted to a comparator and setting it as a new reference point, and by using the new reference point for detecting a zero-cross point (ZCP), and capable of reducing the current ripples for stable control, by correcting a phase conversion point corresponding to the ZCP detected by using the new reference point. <P>SOLUTION: A preset prescribed value is added to a first reference voltage for generating a second reference voltage, and the second reference voltage is used for detecting the ZCP, and for controlling the drive of a sensorless concentrated wiring motor. <P>COPYRIGHT: (C)2007,JPO&INPIT |
