DC commutatorless motor

Details DC commutatorless motor DC commutatorless motor

1992-04-08

1994-03-01

Shoop, Jr., William M.

Electricity: motive power systems

Switched reluctance motor commutation control

318439, 310268, 310 68B, H02P 506

Patent

active

052911047

ABSTRACT:
A DC commutatorless motor in which one pulse is generated per one revolution is disclosed. The motor comprises: three-phase stator windings; a rotor having 2n magnetic poles (where n is a natural number of 2 or more), a portion of one of the magnetic poles having a magnetic property different from that of said one magnetic pole; three detection devices disposed in the vicinity of said rotor, the detection devices being responsive to a magnetic field generated by the magnetic poles and the portion; first to third amplifiers for amplifying respectively the outputs of the three detection devices; first to third subtracting circuits for obtaining respectively the difference of the outputs of two of the first to third amplifiers; an adding circuit for adding the outputs of the first to third subtracting circuits; and a signal circuit for generating a pulse per one revolution of he rotor on the basis of the output of the adding circuit.

REFERENCES:
patent: 4006375 (1977-02-01), Lyman, Jr. et al.
patent: 4568847 (1986-02-01), Schmider
patent: 4743815 (1988-05-01), Gee et al.
patent: 4918346 (1990-04-01), Tajima et al.
patent: 4961017 (1990-10-01), Kakinoki et al.
patent: 5036239 (1971-07-01), Yamaguchi
patent: 5099162 (1992-03-01), Sanada
patent: 5189323 (1993-02-01), Carr et al.

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