| 摘要 |
A servomechanism including a polyphase alternating current synchronous motor and a variable frequency, variable magnitude voltage generating means, said generating means comprising transducing apparatus responsive to the position of the rotor of said motor as well as to a desired speed signal and an actual speed signal to generate signals signifying those components of the voltages to be applied to the stator phase windings of said motor to balance, one, the counter electromotive fore which would be produced across each phase winding at no load at the speed at which the rotor is then rotating and the resistance voltage drop produced across each phase winding by the current then flowing therein, and, two, the leakage and the synchronous reactance voltage drop produced across each phase winding by the current then flowing therein and at the speed at which the rotor is then rotating. These transducing apparatus signals for each phase, after being summed vectorially, caused signal translating apparatus of the voltage generating means to apply voltages to their respective stator phase windings to operate said motor according to said desired speed signal. |
