Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1991-08-07
1993-08-24
Shoop, Jr., William M.
Electricity: motive power systems
Induction motor systems
Primary circuit control
290 31, 290 38R, 318721, 318809, 388930, 322 47, 323205, H02P 534
Patent
active
052392511
ABSTRACT:
An AC variable speed drive (VSD) system having a brushless doubly-fed motor receives power from an electric power grid at a system frequency of the grid and drives a mechanical load. The motor has a rotor with rotor windings and a stator with stator windings comprising first and second polyphase stator systems. The first stator system receives power from the grid at the system frequency. A sensor senses a parameter of the received power by the drive and produces a corresponding power sensor signal. A VSD controller receives and processes the power sensor signal and a reference signal which has been established according to a desired motor operation strategy, and generates therefrom a controller signal. A converter, such as a power electronic converter, receives and converts power from a converter pow
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Cabeca John W.
Shoop Jr. William M.
The State of Oregon Acting by and through the State Board of Hig
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