| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor drive current detection circuit capable of attaining significantly low cost by reducing the number of parts for a configuration without the need of high-precision parts. <P>SOLUTION: This motor drive current detection circuit is composed of: a bridge circuit 11 driven by performing switching forward and reverse rotations of a motor 2; a drive circuit 12 and a CPU10 for controlling the bridge circuit 11; a power supply 3 for supplying electric power to the motor through the bridge circuit 11; a first coil 131 and a second coil 132; a common mode transformer 13 for suppressing common mode noise; and a motor drive current detection circuit 14 for detecting a drive current of the motor from voltage fluctuations in the common mode transformer 13. <P>COPYRIGHT: (C)2007,JPO&INPIT |
