Patent
Uninterruptible power system
Reads0
Chats0
TLDR
In this article, a battery charger coupled to an auxiliary primary operates as a boost converter to provide current to charge the battery at a current level which tracks the input voltage from the AC power system.Abstract:
An uninterruptible power system has a transformer with a primary connected to input terminals, a secondary connected to output terminals, a static switch connected between the input terminals and the primary, and an auxiliary primary connected to an inverter which is supplied by a battery to provide output voltage to the output terminals when a main AC power system connected to the input terminals has failed. The primary has multiple taps at different voltage levels and a buck-boost winding. The taps of the transformer are switched and the buck-boost winding is controlled to provide either buck, boost, or pass-by to allow control of the output voltage from the transformer to within a few percent of a desired voltage level despite large changes in the input voltage. A battery charger coupled to the auxiliary primary operates as a boost converter to provide current to charge the battery at a current level which tracks the input voltage from the AC power system, thereby providing a substantially unity power factor to the AC power system. The voltage control of the output voltage also controls the voltage at the output of the auxiliary primary to which the battery charger is connected, whereby the voltage applied to the charger is substantially regulated and the output power of the charger itself is substantially regulated. The charger can be operated in programmable modes to provide a desired charge configuration for the battery. Detection of faults in the AC power system is enhanced by accurate detection of the zero crossings of the input voltage from the AC power system, and by comparison of the AC input power waveform with an adaptive reference.read more
Citations
More filters
Patent
Cordless power system
Steven J. Phillips,Jeffrey J. Francis,Andrew E. Seman,Daniele C. Brotto,David A. Carrier,Danh Thanh Trinh,Christopher R. Yahnker,James B. Watson,Daniel J. White +8 more
TL;DR: In this paper, the authors describe a cordless system with an identification and communication system by which a battery pack identifies and communicates information about the battery pack to the cordless device or to the charger to which it is mated.
Patent
Non-contact power supply system
TL;DR: In this paper, a power supply system capable of supplying power from a power transmitter to a power receiver in an electrically non-contact manner, in which a power transmission module is attached to the power transmitter and a power reception module is associated with the power receiver, is described.
Patent
Power supply system
TL;DR: In this article, a power supply system is provided, having: a primary side coil; a power transmission apparatus having a primary-side circuit for feeding a pulse voltage resulted from switching a DC voltage which is obtained by rectifying and smoothing a commercial power supply to the primary side-coil; a secondary side coil magnetically coupled to the PSC; and power reception equipment having a secondary-side-circuit with a power adjusting section for adjusting a level of power to be transmitted according to power required by the power receiving equipment.
Patent
Method and apparatus for providing uninterruptible power
Francis J. Masciarelli,Srdan Mutabdzija,Eyob Demissie,Michael J. Ingemi,Donald Lee Charlantini +4 more
TL;DR: In this article, a power supply system includes a frame, a power input to receive input power from a power source, and a power output to provide output power to a load, at least one battery module mounted in the frame and having a battery output that provides battery power.
Patent
Energy management system for automotive vehicle
TL;DR: In this paper, a battery monitor is provided for use with a battery of an automotive vehicle, which can provide real time battery condition measurements and selectively control the charging of the battery through an alternator of the vehicle based upon the measured battery condition.
References
More filters
Patent
Integrated uninterruptible power supply for personal computers
TL;DR: In this paper, a method and apparatus for providing uninterrupted DC and AC power for a desktop personal computer is described, where the source of the uninterrrupted DC and power is derived from an integrated power supply that is sized to fit within the existing housings of most desktop personal computers as a plugin replacement for existing power supplies.
Patent
Method and apparatus for determination of battery run-time in uninterruptible power system
TL;DR: In this paper, the open circuit voltage of the battery is calculated based on the initial voltage adjusted by a factor porportional to the time that the battery has been charged, which is then used to calculate a battery voltage under load conditions by subtracting a term proportional to output current.
Patent
Integrated traction inverter and battery charger apparatus
TL;DR: An integrated traction inverter and battery charger apparatus which is capable of operating in either drive or charge modes is described in this paper. But the authors do not specify the charging mode of the charger.
Patent
Universal battery charging system and a method
TL;DR: In this paper, a universal battery charger and recharger for electric batteries having different charging characteristics is presented, which includes a microprocessor receiving inputs from current, voltage and temperature sensors for controlling the battery charging profile.
Patent
Uninterruptible power supply with improved output regulation
TL;DR: In this article, a microprocessor based uninterruptible power supply generates an AC electrical output power from an AC input source when the input source is within settable voltage limits and from an auxiliary source of DC power when the output source is outside said voltage limits, and an average current feedback loop provides the output voltage regulation and utilizes current limiting to provide output current limiting for protection against short circuits and overloads.