Shell-form transformer in a battery powered impact device

Details Shell-form transformer in a battery powered impact device Shell-form transformer in a battery powered impact device

1990-11-30

1992-04-21

Kozma, Thomas J.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

Systems for magnetizing, demagnetizing, or controlling the...

336178, 336182, H01H 4700, H01F 2730

Patent

active

051073900

ABSTRACT:
A shell-form transformer for charging an energy storage device contained in a battery powered impact device. The primary and secondary windings of the transformer are wound in a predetermined manner around the center leg of a core which has an air gap therein. The gap increases the reluctance of the center leg which decreases the flow of magnetic flux through the core which, in turn, enables the current applied to the transformer primary to be increased without causing the core to be saturated. As a result, the current applied to the transformer primary can be increased, thereby increasing the output voltage supplied from the transformer secondary which, in turn, enables rapid charging of the energy storage device.

REFERENCES:
patent: 2261323 (1941-11-01), Zierdt
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patent: 3546571 (1970-12-01), Fletcher et al.
patent: 3803479 (1974-04-01), Ratnor
patent: 4305056 (1981-12-01), Mochida et al.
patent: 4319837 (1982-03-01), Marshall
patent: 4356468 (1982-10-01), Van Laar
patent: 4639706 (1987-01-01), Shimizu
patent: 4763094 (1988-08-01), Kojima

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