| 摘要 |
PURPOSE:To safely use a motor within the rated output by providing high voltage applying time control means and high voltage applying time width limiting means for setting the maximum high voltage applying time width. CONSTITUTION:A pulse of the time width of the maximum applying time TMAX of a high voltage E1 is output as the output of a monostable multivibrator IC4. This output is input to one input terminal of a 2-input AND gate IC3, and a coil current detection output is input to the other input terminal. Thus, the upper limit of the applying time of the voltage E1 is decided, and even if the coil current does not become the set value, the application of the high voltage E1 is stopped, the upper limit is provided in a motor torque to eliminate the supply of mechanical output higher than the rated output which is intrinsic for the motor, thereby obviating the deterioration of the lifetime characteristics. |
