| 摘要 |
PROBLEM TO BE SOLVED: To provide a lock signal detecting apparatus of a motor that can detect locking of the rotor of the motor by a circuit of simple configuration. SOLUTION: The lock signal output circuit of motors has a fan motor circuit 4 that has a driver IC1 and a motor rotation detecting component 2, outputs the rotation signal of pulses, when the motor is rotated, and outputs a fixed voltage lock signal when the rotor is locked, and a rotation signal/lock signal detecting circuit 5 for applying the signal output of the fan motor circuit 4. The rotation signal/lock signal detecting circuit 5 comprises a capacitor C1 that serves as a signal input side, a grounded resistor R3 in series with the capacitor C1, and a FET 6 for connecting the connection point between the capacitor C1 and the resistor R3 to a gate terminal, thus surely identifying the rotation signal that is a pulse signal from a fixed voltage lock signal. |
