Electricity: motive power systems – Reciprocating or oscillating motor – Energizing winding circuit control
Patent
1976-10-05
1979-07-24
Truhe, J. V.
Electricity: motive power systems
Reciprocating or oscillating motor
Energizing winding circuit control
318254, 318439, H02K 2900, H02P 700
Patent
active
041624351
ABSTRACT:
Method and apparatus for electronically commutating a direct current motor is disclosed not requiring position sensors but rather sampling induced voltage across an unenergized motor winding to derive control signals therefrom. One motor winding is energized while the voltage across another winding is sampled and integrated to provide a flux indication. The integrated voltage sample is compared to a reference and when that integrated value exceeds the reference, the next winding of the motor is enabled and the voltage integral returned to an initial value. A ring counter maintains an indication of the currently energized winding and may also be employed to cause the sampling circuit to sample the induced voltage on the winding next in the motor sequence to be energized.
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General Electric Company
Indyk Eugene S.
Krisher, Jr. Ralph E.
Lowe A. Burgess
Truhe J. V.
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