US 4,376,250 AGranted

Portable power source

AssigneeDynamote Corporation

InventorsJames W. Baker, Jr., Paul W. Hodge, Franklin R. Schneider

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Abstract

An apparatus providing a source of alternating power for power devices is disclosed. The apparatus comprises a frame member having a plurality of ground engaging wheels for transporting the frame member along the ground. The frame member carries a plurality of DC storage means therein. A transformer means carried on the frame has a low voltage center tapped winding, a line voltage winding, and a high voltage winding. The low voltage center tapped winding is in communication with the DC storage means, and the line voltage winding is operable to produce an AC output voltage suitable for powering devices. A plurality of controllable rectifier means is in communication with both the high voltage winding and the low voltage center tapped winding. The rectifier means are operable to alternately provide a conduction path for said DC storage means through both halves of the low voltage center tapped winding.

Claims22

Dependent claims

An apparatus providing a source of alternating current power for power devices comprising:

(a) a frame member;
(b) a plurality of ground engaging wheels for transporting said frame member over the ground;
(c) DC storage means carried on said frame member, said DC storage means having positive and negative outputs;
(d) a transformer means having a low voltage center tapped winding, a line voltage winding, and a high voltage winding, wherein said low voltage center tapped winding is interconnected with the positive output of said DC storage means and wherein said line voltage winding is operable to produce an AC output voltage suitable for powering devices;
(e) first and second controllable rectifier means operably interconnected with both said high voltage winding and said low voltage center tapped winding;
(f) oscillatory circuit means for alternately activating said first and second rectifier means to provide first and second conduction paths for the power in said DC storage means through opposite halves of said transformer means low voltage center tapped winding;
and
(g) means for alternately terminating the operation of said first and second rectifier means by producing a reverse voltage in series with the first and second conduction paths extending between said DC storage means and the opposite halves of said transformer low voltage center tapped winding.

5 more elements

An apparatus providing a source of alternating current power for power devices, said apparatus comprising:

(a) a plurality of DC storage means having positive and negative outputs thereon;
(b) inverter means operably interconnected to said DC storage means for transforming the DC power from said DC storage means into AC power, said inverter means including:
transformer means having a low voltage center tapped winding, a line voltage winding, and a high voltage winding, wherein said low voltage center tapped winding is interconnected with the positive output of said DC storage means, and wherein said line voltage winding is operable to produce an AC output voltage suitable for powering devices;
and
first and second controllable rectifier means operably interconnected with both said high voltage winding and said low voltage center tapped winding;
(c) oscillatory circuit means for alternately activating said first and second rectifier means to provide first and second conduction paths for the power in said DC storage means through opposite halves of said transformer means low voltage center tapped winding;
and
(d) means for alternately terminating the operation of said first and second rectifier means by producing a reverse voltage in series with the first and second conduction paths extending between said DC storage means and the opposite halves of said transformer low voltage center tapped winding.

5 more elements

Dependencies are inferred from the claim text.