Patent
Uninterruptible power supply with passing neutral, comprising a twin step-up chopper
Henri Mabboux,Olivier Parrot +1 more
Reads0
Chats0
TLDR
In this paper, an uninterruptible power supply, with passing neutral, comprises a twin step-up chopper whose input is connected to a battery and to a rectifier circuit connected to the mains power system.Abstract:
An uninterruptible power supply, with passing neutral, comprises a twin step-up chopper whose input is connected to a battery and to a rectifier circuit connected to the mains power system. The twin step-up chopper comprises a positive step-up chopper supplying a first output voltage between a positive DC output and neutral, and a negative step-up chopper supplying a second output voltage between a negative DC output and neutral. The control circuit of the twin step-up chopper comprises means for regulating imbalance between the output voltages of the positive and negative step-up choppers, suitable both for operation on the mains power system and for operation on the battery.read more
Citations
More filters
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
Methods and systems for managing facility power and cooling
TL;DR: In this article, the authors present a system and method that enables a data center operator to determine available power and cooling at specific areas and enclosures in a data centre to assist in locating new equipment in the data center.
Patent
Data center control
TL;DR: In this paper, the authors present a data center with a plurality of racks and at least one cooling unit, and a rack-based cooling metric threshold is also provided, which can determine a layout of the data center that minimizes total power consumption of the plurality of servers and the cooling unit while maintaining cooling performance at an acceptable level.
Patent
Method and apparatus for cooling
Ozan Tutunoglu,John H. Bean +1 more
TL;DR: In this paper, a method of calculating net sensible cooling capacity of a cooling unit is proposed, which includes measuring a discharge pressure from of fluid from a compressor and a suction pressure from an evaporator.
Patent
Power system method and apparatus
TL;DR: In this article, the authors propose a power converter system topology that consists of a first DC/DC converter to pull a positive rail of a high voltage bus up, while a second DC-DC converter pushes a negative rail of the high voltage buses down.
References
More filters
Patent
Uninterruptible power supplies
TL;DR: In this article, a battery test on load capability is provided by allowing the dumping of the charge stored within the storage batteries for a certain period at the maximum available rate into the internal bus and back into the AC supply through the reversible rectifiers; meanwhile observing the extent of the battery voatage drop so caused.
Patent
Stabilized power supply unit
TL;DR: In this article, a stabilized power supply unit is designed to supply the power from the commercial power source as far as the commercial source is normal but supply power from a battery that can be made available by an automatic switching device.
Patent
No-break power supply
TL;DR: An A.C. power supply conditioner uses semi-conductor diodes (D1 and D2) and energy storage capacitors (C1 and C2) to produce a high D.c. voltage which is inverted at (TR 1) and (TR 2) to provide an output (L0, N0) without use of isolating transformer as mentioned in this paper.
Patent
D.C. chopper regulating method and apparatus incorporating bilateral regulating voltage path
TL;DR: In this paper, a high power chopper (34,36) is used to produce a first chopped signal having the same voltage as the input (VIN), and by a low power (56,58) to produce another chopped signal in synchronism with and having a lower voltage than the first one.
Patent
Current-mode control of capacitively coupled power converters
Nathan O. Sokal,Richard Redl +1 more
TL;DR: In this article, a circuit for enabling current mode control to be used with a capacitively coupled power converter is presented, which includes circuitry for comparing the voltage across a coupling capacitor with its intended voltage and for generating an unbalance signal corresponding to any deviation.