| 摘要 |
<p>PURPOSE:To detect with high accuracy driving current, which is chopper- controlled and flows from power supply to motor, and regenerative current, which flows from motor to power supply. CONSTITUTION:The motor current detecting equipment includes a shunt resistance Rs through which driving current If, flowing from a battery B to a motor M, and regenerative current Ir, flowing from the motor M to the battery B, are passed; an operational amplifier OP1 to which voltage produced in the shunt resistance Rs is to be input; and another operational amplifier OP2 to which the output voltage of the operational amplifier OP1 is to be input through a diode D6. The gain of the operational amplifier OP1 is equalized with that of the operational amplifier OP2.</p> |
