Method and apparatus for providing AC or DC power for battery po

Details Method and apparatus for providing AC or DC power for battery po Method and apparatus for providing AC or DC power for battery po

1996-06-24

1998-02-03

Wong, Peter S.

Electric power conversion systems

Current conversion

With means to connect the input to diverse power sources

307 26, 307 80, 439500, 439956, H02M 110

Patent

active

057151563

ABSTRACT:
Method and apparatus for providing either AC mains or DC power for an electrically powered tool having a motor designed to be powered by a removable battery pack which fits into a recess in the tool. The apparatus includes a power block capable of being powered either by AC mains or DC power. The power block includes an AC to DC convertor, a voltage input selector, a DC to DC convertor, an auto voltage selector, and a solid state current monitor which automatically sets the voltage and current to be delivered to the tool motor at the voltage and current required to produce the tool motor's full rated driving torque. The apparatus also includes an AC mains plug and a first flexible line running from the AC mains plug to the power block, a DC plug and a second flexible line running from the DC plug to the power block, a multi-pin male DC plug and a third flexible line running from the male DC plug to the power block and a DC power connector designed to receive the male DC plug and fit into the recess in the tool which receives the battery pack.

REFERENCES:
patent: 2590805 (1952-03-01), Vitale
patent: 4835410 (1989-05-01), Bhagwat et al.
patent: 5497245 (1996-03-01), Uchida

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