| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a brushless DC motor mounted on a blower which can ensure high noise resistance during standby and achieve downsizing without adding a new interface. <P>SOLUTION: Sequence control means 13 has a constitution in which a signal of position detection means 7 is switched from stable potential to a relative position signal of a magnet rotor 6 before and after output of a gate signal generating part 11. During standby, the sequence control means 13 makes the output of the position detection means 7 the stable potential based on a speed instruction signal so that the stable potential is applied to an input part of the gate signal generating part 11. When transiting from standby to starting, the sequence control means 13 makes the output of the position detection means 7 the relative position signal of the magnet rotor so that an input to the input part of the gate signal generating part 11 is switched from the stable potential to the relative positional signal. Therefore, a brushless DC motor can ensure high noise resistance during standby and achieve downsizing without adding a new interface. <P>COPYRIGHT: (C)2012,JPO&INPIT |
