| 摘要 |
PURPOSE:To avoid the power loss of a power source at the motor stopping time by connecting detecting means for detecting the drive voltage of the motor in parallel with the motor at the nonpower source side of the switch for driving the motor. CONSTITUTION:Motors M1, M2 are respectively connected through switches S1, S2, to a power source B, resistors R1, R2 for detecting the motor current are connected to the nonpower source side of the motors M1, M2, and a series circuit of resistors Ra, Rb is connected through diodes D1, D2 to the nonpower source side of the switches S1, S2 in parallel with the motors M1, M2. The drive voltages of the motors M1, M2 are produced by the voltage divided by the resistors Ra, Rb, and inputted to a microprocessor 4 through an A/D converter 3 together with the resistors R1, R2 due to the motor current. Accordingly, the drive voltage can be readily detected by eliminating the loss of the power source B at the motor stopping time. |
