Electricity: motive power systems – Battery-fed motor systems
Patent
1989-08-04
1991-05-14
Shoop, Jr., William M.
Electricity: motive power systems
Battery-fed motor systems
318254, H02K 2900
Patent
active
050159275
ABSTRACT:
In a plural phase electric motor, a control method senses regeneration current from a non-energized phase and commutates to the next state. In the next state, the unenergized phase of the present state is energized in a polarity opposing the regeneration current of the present state, such that during the next state, energization current is directed in the last noted phase in a direction opposite to the regeneration current of the present state. In the state prior to the present state, the unenergized phase of the present state is energized in a polarity aiding the regeneration current of the present state, such that during the prior state, energization current is directed in the last noted phase in the same direction as the regeneration current of the present state. In the preferred embodiment, all of the commutation switches are periodically simultaneously turned off for a given blanking interval, and the regeneration current is sensed on a common DC bus during such interval.
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Cabeca J. W.
Shoop Jr. William M.
Thor Technology Corporation
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