Three-phase generator boost circuit

Details Three-phase generator boost circuit Three-phase generator boost circuit

1999-07-23

2000-02-01

Masih, Karen

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

Motors electrically connected in cascade or tandem

318254, 318439, 318138, 318798, 318 34, H02P 767

Patent

active

060206950

ABSTRACT:
A three-phase generator boost circuit for augmenting the back electromotive force produced by a spindle motor of a disk drive is disclosed. First and second nodes provide normal connection to a source of DC voltage for the spindle motor and a second motor connected between the first and second nodes. A commutator is connected to a sequencer to operate the spindle motor. In the event of catastrophic shutdown, two of the lower commutator switches are operated to short circuit the two stator coils having the highest and lowest voltages to store energy in the coils. The commutator switches are then operated to discharge current through the nodes to a storage capacitor for the second motor.

REFERENCES:
patent: 5473725 (1995-12-01), Chen et al.
patent: 5495372 (1996-02-01), Bahlmann et al.
patent: 5504402 (1996-04-01), Menegoli
patent: 5506487 (1996-04-01), Young et al.
patent: 5949204 (1999-09-01), Huggett et al.

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