Electricity: motive power systems – Synchronous motor systems – Field winding circuits
Patent
1979-06-05
1981-10-13
Truhe, J. V.
Electricity: motive power systems
Synchronous motor systems
Field winding circuits
318721, H02P 540
Patent
active
042950848
ABSTRACT:
A control apparatus of a synchronous motor having armature windings and perpendicular field windings comprises a frequency converter of a cycloconverter which converts the frequency of an alternating current and supplies the converted current to the armature windings of the synchronous motor. On a shaft of the synchronous motor are installed a speed detector, a position detector, and a speed instruction circuit. The frequency converter is controlled in accordance with the outputs of the speed detector, the position detector and the speed instruction circuit. An alternating current excites the field windings, so that a field of magnetic force is rotationally generated. The direction of the magnetic field is determined depending upon the output of the speed detector.
REFERENCES:
patent: 3588645 (1971-06-01), Gilmore
patent: 3636425 (1972-01-01), Dickinson et al.
patent: 4058755 (1977-11-01), Honbu et al.
patent: 4060753 (1977-11-01), Okuyama et al.
patent: 4088932 (1978-05-01), Okuyama et al.
patent: 4093898 (1978-06-01), Morters et al.
patent: 4125796 (1978-11-01), Nagase et al.
Kubota Yuzuru
Nagase Hiroshi
Okuyama Toshiaki
Suzuki Katsunori
Hitachi , Ltd.
Moose Richard M.
Truhe J. V.
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