Motors

Details Motors Motors

1981-10-06

1983-07-26

Truhe, J. V.

Electricity: motive power systems

Limitation of motor load, current, torque or force

318710, 310 68E, 310162, H02P 148

Patent

active

043956688

ABSTRACT:
A synchronous motor comprising a permanent-magnet rotor and a stator which, at startup, uses rectifiers for supplying the stator coil with rectified current and a commutator consisting of sliders and brushes both rotary in union with the rotor in order to supply only the rectified component, effective to energize the rotor's rotation, from the AC power-supply, and which is provided with a mechanical conversion device designed such that, when the rotor's rotation has reached nearly the speed of synchronous rotation, the slider is allowed to move in the direction along the rotary shaft to become released from contact with the brush, for removal of contact load and at the same time to supply the stator directly with the power-supply AC.

REFERENCES:
patent: 3014142 (1961-12-01), Lee

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