Electricity: motive power systems – Induction motor systems – Reversing
Patent
1991-08-05
1994-03-08
Shoop, Jr., William M.
Electricity: motive power systems
Induction motor systems
Reversing
318768, 363150, H02P 126
Patent
active
052931080
ABSTRACT:
A relatively compact static phase converter is adapted to be disposed within the housing of an appliance, such as a refrigeration unit, making it thus suitable for residential as well as commercial applications. The static phase converter is formed as a modular unit to occupy a relatively small volume, for example, 0.5 cubic feet or less, and is adapted to be disposed adjacent the compressor compartment in a typical refrigeration unit with minimal modification. The static converter includes a balancing coil adapted to be coupled across a source of single phase electrical power, such as 120 volts AC. Two phases of a three phase electrical motor are adapted to be connected in parallel across the balancing coil. The third phase is adapted to be connected to the center phase by way of a running capacitor. Starting circuitry which includes a starting capacitor as well as a control relay is included. The relatively few number of components allows the static phase converter to occupy a relatively small volume which makes it adaptable to being disposed within the housings of various appliances including refrigeration units.
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Cabeca John W.
Shoop Jr. William M.
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