Uninterruptible power supply with a variable speed drive driving

Details Uninterruptible power supply with a variable speed drive driving Uninterruptible power supply with a variable speed drive driving

1990-01-11

1992-01-14

Deboer, Todd E.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307 47, 307 66, 322 47, H02J 904, H02P 541

Patent

active

050813684

ABSTRACT:
An uninterruptible power source includes an induction motor/generator assembly and a continuously on line variable speed drive connected to inductively accelerate the motor/generator assembly to near rated speed. When the motor/generator assembly reaches rated speed, the motor/generator is switched to synchronous operation, while still under control of the variable speed drive. The variable speed drive includes slip compensation to maintain the motor at rated speed. The variable speed drive operates in response to a utility power signal and to a standby power signal. When the utility power signal fails, operation of the drive is maintained, without interruption, by the standby power.

REFERENCES:
patent: 3665495 (1972-05-01), Carter et al.
patent: 4465943 (1984-08-01), Risberg

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