Commutatorless D.C. motor with three-strand full-pitched stator

Details Commutatorless D.C. motor with three-strand full-pitched stator Commutatorless D.C. motor with three-strand full-pitched stator

1984-07-27

1986-03-18

Shoop, Jr., William M.

Electricity: motive power systems

Switched reluctance motor commutation control

310 68R, 310181, 310184, H02K 2908

Patent

active

045771391

ABSTRACT:
A commutatorless D.C. motor with cylindrical air gap, consisting of a stator with three stator winding strands displaced by 120.degree. electrical and with a permanent-magnetic external rotor with at least p=1 pairs of poles and with N=2p.times.3 winding slots in the stator as well as with at least two rotation position detectors composed of Hall generators, which switch on and off the individual winding strands depending on the rotation position of the rotor, in which connection the rotor (7) exhibits p=2 or p=4 pairs of poles, and the stator windings are full pitch, also each winding strand (3,4,5) is subdivided into w=2p winding sections, whose central axes exhibit a separation of 180.degree. electrical, viewed in the direction of rotation, and the direction of winding of the winding sections is such that at the periphery of the stator (1) alternating North and South poles, viewed in the direction of rotation, are produced by the winding sections.
The rotor magnet 7 is magnetized with four poles and is provided with the cut-outs 8 of 50.degree.-60.degree.0 electrical depicted in FIG. 4.

REFERENCES:
patent: 3230434 (1966-01-01), Bauerlein
patent: 4019075 (1977-04-01), Kagami
patent: 4130769 (1978-12-01), Karube
patent: 4217508 (1980-08-01), Uzuka
Sprague Engineering Bulletin, Bipolar Hall Effect Digital Switches UGN-3030 T/U and UGS-3030T/U.

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