Electricity: motive power systems – Automatic and/or with time-delay means – Responsive to thermal conditions
Patent
1984-06-13
1986-01-07
Miska, Vit W.
Electricity: motive power systems
Automatic and/or with time-delay means
Responsive to thermal conditions
318334, 307 64, 361 22, 361 26, G05D 2308, H02J 900
Patent
active
045636249
ABSTRACT:
A refrigeration compressor is disclosed which includes a compressor means, a two phase motor drivingly connected thereto and an associated power supply operative to convert single phase 60 hertz alternating current to two phase controlled frequency alternating current so as to enable the compressor to be operated from conventional single phase power and at any point within a range of speeds commensurate with the loading thereon. The power supply also includes improved filtering means for each of the output phases of the power supply. A line break motor protector is also provided which is particularly well suited for use with two phase motors. Additionally, in order to increase reliability, circuitry is also provided for directly connecting the two phase motor to the single phase power supply in such a manner so as to enable the two phase motor to be operated directly from the single phase supply in the event of failure of the two phase power supply.
REFERENCES:
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patent: 4259845 (1981-04-01), Norbeck
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"LossyLine Absorptive Filters", Product Brochure, Lundy Electronics & Systems, Inc., Glen Head, N.Y., 1966.
"Electronics Letters", vol. 13, No. 22, pp. 683-684, Oct. 27, 1977.
Copeland Corporation
Miska Vit W.
Ro Bentsu
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