Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Patent
1989-05-30
1993-04-06
Pellinen, A. D.
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
62236, 307103, 318441, F24F 1100
Patent
active
052006441
ABSTRACT:
An air conditioning system comprises a converter for converting a commercial AC into DC, an inverter for reconverting the DC into an AC having a predetermined frequency corresponding to an air conditioner load, a compressor driven with the AC from the inverter under a compressor capacity control operation matching the load, a battery used for dealing with a voltage drop of the supply power from the commercial AC power source and for supplying a DC different from the DC converted by the converter to the inverter via a switching element, and a discharge control unit for controlling the switching element in the manner that the battery supplies a current having a predetermined value proportional to a difference between the AC supplied from the power source to the converter and a preset current value.
REFERENCES:
patent: 4313060 (1982-01-01), Fickenscher et al.
patent: 4401895 (1983-08-01), Petkovsek
patent: 4517471 (1985-05-01), Sachs
patent: 4672520 (1987-06-01), Ueda et al.
patent: 4720982 (1988-01-01), Shimizu et al.
patent: 4745299 (1988-05-01), Eng et al.
Akiyama Kazuhiko
Kobayashi Takehiro
Kabushiki Kaisha Toshiba
Osborn David
Pellinen A. D.
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