Traveller's voltage converter for automatically selecting load w

Details Traveller's voltage converter for automatically selecting load w Traveller's voltage converter for automatically selecting load w

1995-09-05

1996-12-31

Nguyen, Matthew V.

Electricity: power supply or regulation systems

Output level responsive

Using a transformer or inductor as the final control device

G05F 112

Patent

active

055897606

ABSTRACT:
A voltage converter for traveller's uses includes: a 50 watts (0-50 W) transformer for converting an input voltage of 220 VAC to an output voltage of 110 VAC for normally powering a load of 50 watts or less; a 1600 watts (50-1600 W) transformer for converting an intput voltage of 220 VAC to an output voltage of 110 VAC for powering a load ranging from 50 watts to 1600 watts; and a sensing control circuit operatively sensing an output load having a power rating larger than 50 watts (50 W to 1600 W) for operatively actuating a relay for automatically switching an output terminal of the 50 watts transformer to the output terminal of the 1600 watts transformer for preventing burning or damaging of the output load connected with the voltage converter and for protecting the voltage converter itself.

REFERENCES:
patent: 4213083 (1980-07-01), Freygang
patent: 4631652 (1986-12-01), Wendt
patent: 4896093 (1990-01-01), Spires
patent: 5159545 (1992-10-01), Lee

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