| 摘要 |
PURPOSE:To save energy by changing the amperage to be judged, in accordance with the temp., in case the current to the motor shall be shut when the current flowing in the motor is judged to be below a specific value, thereby carrying out a proper judgement of amperage, and by judging that motor operation is not needed. CONSTITUTION:When current flows through a motor 12, a voltage is generated at a resistor 11 to be fed to non-inversible input terminals of comparators 2-4 through resistors 8-10. Any comparator where the voltage fed to the non-inversible input terminal is greater than the voltage fed to the inversible input terminal shall emit an output signal at (1) level, while the comparators with different judgement emit an output signal with (0) level. Thereby a control circuit 1 reads the current value flowing in the motor 12. Here the characteristics of thermistors 13-15 shall be set so that the change of reference value fed into the inversible input terminal according to temp. change will be equal to the amount of change of the voltage fed into the non-inversible input terminal. |
