Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1985-06-07
1987-02-17
Beha, Jr., William M.
Electricity: motive power systems
Induction motor systems
Primary circuit control
363 36, 363148, 363154, H02P 7292, H02M 5458
Patent
active
046442413
ABSTRACT:
An apparatus for converting a single phase electrical signal into a three phase electrical signal is disclosed. A converter includes a rectifier connectable to a single phase electrical power source. One output of the rectifier is connected through a smoothing ciruit to four switching transistors. The other output of the rectifier is connected to center taps of a first and a second load coil. The first phase load coil is connected across a first pair of the switching transistors and the second phase load coil is connected across a second pair of the switching transistors. Third and fourth phase load coils are connected to opposite sides of the first and second phase load coils. The first, second, and third phase load coils are delta connected and the first, second, and fourth phase load coils are delta connected. The first and second pairs of switching transistors are controlled by first and second pairs of phase shifting signals. Each of the first and second pairs of phase shifting signals includes positive and negative pulses which provide three phase conversion across the first, second, and third plus fourth phase load coils.
REFERENCES:
patent: 4060754 (1977-11-01), Kirtley et al.
Beha, Jr. William M.
Tokai TRW & Co. Ltd.
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