Synchronous motor

Details Synchronous motor Synchronous motor

1980-05-27

1982-10-19

Miller, J. D.

Electrical generator or motor structure

Dynamoelectric

Rotary

310172, H02K 1900

Patent

active

043552528

ABSTRACT:
In a self-starting unidirectional synchronous motor which includes a stator, an exciting coil at least partly disposed within the stator, a permanent magnet type rotor which has a plurality of rotor poles and is at least partly disposed within the coil, and wherein a space is defined between the rotor and the coil, and the stator includes groups of unshaded main poles and groups of shaded auxiliary poles alternating with each other, and respective end zones are defined between adjacent groups, and each pole generates a corresponding magnetic field, the poles comprise pole arms extending into the space and include half poles disposed at least near the end zones, respectively, and wherein the groups of shaded poles are displaced with respect to the groups of non-shaded poles by respective spatial electrical angles, and the magnetic fields of groups of shaded poles are shifted with respect to groups of non-shaded poles by respective phase angles.

REFERENCES:
patent: 2437142 (1948-03-01), Welch et al.
patent: 2951957 (1960-09-01), Eigeman
patent: 3737695 (1973-06-01), Kilmer
patent: 3808491 (1974-04-01), Riggs
patent: 4012652 (1977-03-01), Gilbert

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