| 摘要 |
PURPOSE:To eliminate the generation of a noise by inserting a resistor in series with a stator coil, thereby eliminating a current flowed through the coil to become a middle recess waveform. CONSTITUTION:Resistors 41a, 41b are interposed between the output terminals of amplifiers 32a, 32b and the input terminal of a stator coil 22. A synchronization control system 42 detects rotary information of a rotor by a pickup coil 43, applies the output signal of the coil 43 and the output signal of a reference signal generator 44 to a phase detector 45 to obtain a signal corresponding to the phase difference of the both signals, and to apply the signal through a loop filter 46 to the output voltage control signal of a power source circuit 47. The output voltage of the power source circuit 47 is applied to the power terminals of the amplifiers 32a, 32b. |
