| 摘要 |
PURPOSE:To maintain and control a cooling section at a suitable temperature, by incorporating a start/stop circuit in a brushless motor which is provided with a drive circuit in principle so that the start/stop circuit is turned on and off in accordance with temperatures. CONSTITUTION:The output of a hall device 2 which detects the magnetic field of an armature 6 in a D. C. brushless motor 4, is delivered to a logic circuit 12 through a hall amplifier A1 to produce outputs #1, #2 which enegizes power amplifier A2, A3 through a power driver 14. With this arrangement, when alternate current is applied to a stator winding, torque is obtained. The power driver 14 is provided with a switch circuit which turns on and off the supply input to the power amplifier A2, A3 in accordance with a set temperature by means of a start/stop circuit 16 in association with a thermistor 18. |
