The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 19, 2002
Filed:
Jul. 19, 2000
Richmond Andrew Real, Olean, NY (US);
Acme Electric Corporation, East Aurora, NY (US);
Abstract
An uninterruptible power supply includes an inverter provided with power from a utility and a battery. The battery is connected through a FET so that battery power is instantly supplied to the inverter through the intrinsic FET diode when the utility power fails. The battery discharge FET is operated by an oscillator driven control circuit. The inverter includes an amplitude circuit and a polarity circuit. The inverter amplitude circuit includes FET operated by driver circuits that ensure efficient switching. The phase shifted full bridge pulse width modulated amplitude circuit converts the input power to a pulse width modulated output representing the amplitude of the power supply voltage, which is switched by the polarity circuit and to obtain the desired output voltage polarity. A falling edge bleeder ensures that a decreasing output voltage magnitude follows the desired waveform.