| 摘要 |
PURPOSE:To maintain the temperature of the armature part of a DC motor in a specified range so as to rationalize the cooling effect by measuring the temperature of the armature of a DC motor, and sending the signal of a temperature sensor to the inverter installed in the control panel of a cooling fan, and varying the number of revolutions of the cooling fan. CONSTITUTION:A noncontact-type temperature sensor 1 provided with signal output function for measuring the temperature of the armature of DC motor, and a signal is sent from the temperature sensor 1 provided with signal output function to the inverter 2 installed in the control panel of a cooling fan so as to vary the number of revolutions of the cooling fan 3. By the number of revolutions of the cooling fan changing, it becomes possible to keep the temperature of the armature of the DC motor 4 constant. Hereby, even if the ambient temperature changes, the temperature of the armature of the DC motor becomes constant, so the condition of the armature part can be kept constant. |
