Pumps – Condition responsive control of pump drive motor – By control of electric or magnetic drive motor
Patent
1980-02-07
1982-06-01
Wayner, William E.
Pumps
Condition responsive control of pump drive motor
By control of electric or magnetic drive motor
62228, F04B 4906
Patent
active
043325289
ABSTRACT:
The compression type refrigerating device having a compressor defining a pressure space and being driven by an asynchronous motor comprises a pressure sensitive switch arranged in a sealed housing communicating with the pressure space of the compressor and connecting in response to a predetermined pressure level in the housing an additional field coil in series with a main field coil of stator of the electromotor. In this manner the efficiency of the intermittently operating asynchronous driving motor is improved.
REFERENCES:
patent: 2229986 (1941-01-01), Page
patent: 2646204 (1953-07-01), Rosenschold
patent: 3898527 (1975-08-01), Cawley
patent: 3985467 (1976-10-01), Lefferson
patent: 4064420 (1977-12-01), Yuda et al.
Robert & Bosch GmbH
Striker Michael J.
Wayner William E.
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