Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1996-11-22
1998-09-15
Shoop, Jr., William M.
Electricity: motive power systems
Induction motor systems
Primary circuit control
318139, 318254, 318439, H02P 126
Patent
active
058084401
ABSTRACT:
Commutation is the process of driving current through the windings to produce a rotating magnetic field that the rotor attempts to catch. Typically, four to six commutation cycles occur for each rotation of the rotor of the motor. Unlike traditional commutation methods where only six phases are commutated during one commutation cycle, the hybrid commutation cycle includes 12 phases. The particular method for commutation switches between current driving modes where one driving mode drives current through all three windings and an other driving mode drives current through less than all three windings of the motor. More particularly, in the second driving mode current is driven through two windings of the motor. During a commutation cycle, these driving modes are alternated.
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Bennett George J.
Codilian Raffi
Lockett Kim
Shara, Esq. Milad G.
Shoop Jr. William M.
Western Digital Corporation
Young, Esq. Leo J.
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