| 摘要 |
<p>1,201,584. Control of A.C. motors; core constructions. LICENTIA PATENT-VERWALTUNGS-G.m.b.H. 30 Dec., 1968 [30 Dec., 1967], No. 61606/68. Headings H2A and H2J. A synchronous motor has an unwound rotor with salient poles, and its stator is supplied from an inverter which receives commutating signals to determine the speed of the motor. The rotor is coupled to a position transducer which detects the load angle of the motor, and which develops signals for controlling the inverter. When the motor tends to hunt or fall out of synchronism due to overload, the signals from the transducer are temporarily delayed to prevent the optimum load angle from being exceeded, the motor being restored to its normal speed after the overload is removed. The rotor and stator are both laminated, and the rotor is slotted in the manner of reluctance motors. The gaps between the rotor poles are filled in to prevent air turbulence. The stator voltage is normally constant, and is reduced only after the frequency has dropped by a substantial amount. Regenerated energy is controlled by a resistor connected to an electronic switch. The inverter has a buffer capacitor and is supplied by a rectifier.</p> |
