| 摘要 |
PURPOSE:To make possible to operate a motor without requiring replacement or repair even when the motor torque is deficient by oscillating power to be fed to a DC motor in the phase thereby producing a varying torque. CONSTITUTION:Since power supply voltage is subjected to pulsation control through a switching circuit 5, current to be fed to a motor 1 has a waveform I1 varying like a pulse with a predetermined frequency. When the vibrating waveform I1 has same average value as that of a DC current waveform I0, effective current values are also same. Consequently, supply capacity of power supply connected at a power supply terminal 10 is not required to be modified. Maximum value of current being fed from a driving circuit 2 to the motor 1 can thereby be increased by oscillating the current to be fed to the driving circuit 2 even if conventional circuit elements are employed except a booster circuit 4, the switching circuit 5 and a pulse generating circuit 6. When the instantaneous value of current being fed to the motor 1 increases, instantaneous torque also increases. |
