| 摘要 |
PROBLEM TO BE SOLVED: To prevent an element of a circuit and a coil of a motor from being damaged when heat is stored in the element of the circuit and the coil of the motor caused by motor lock or the like.SOLUTION: A motor control device comprises: a current detection part 94 for outputting a signal corresponding to a current value between a battery 80 and an inverter circuit 40 which generates a voltage to be applied to a coil 14 of a motor 52; an overcurrent determination value output part 100 which outputs an overcurrent determination value for determining whether the motor 52 is in an overcurrent state; a thermistor RT which detects a temperature; a bridge resistor RB which connects an output terminal of the thermistor RT and an output terminal of the overcurrent determination value output part 100 in order to adjust the overcurrent determination value; an overcurrent determination part 102 which determines that the motor 52 is in the overcurrent state if a signal output by the current detection signal 94 is equal to or higher than the overcurrent determination value; and an FET driver 70 which stops electrification to the coil 14 if the overcurrent determination part 102 determines that the motor 52 is in the overcurrent state.SELECTED DRAWING: Figure 2 |
