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Method and device of soft start of bus voltage in uninterruptible power supply

A bus voltage and soft start technology, applied in battery circuit devices, circuit devices, electric vehicles, etc., can solve the problems of high cost, poor reliability, and inability to be used in step-up DC source discharge topology, etc., to achieve low cost and control logically simple effect

Active Publication Date: 2010-03-31
VERTIV CORP
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Problems solved by technology

[0011] The technical problem to be solved by the present invention is to provide a low-cost, suitable for non-isolated Boost DC source discharge topology in view of the defects of the prior art that the above-mentioned high cost, poor reliability, and inability to be used in a boost DC source discharge topology , Simple control logic bus voltage soft start method

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  • Method and device of soft start of bus voltage in uninterruptible power supply
  • Method and device of soft start of bus voltage in uninterruptible power supply
  • Method and device of soft start of bus voltage in uninterruptible power supply

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Embodiment Construction

[0036]The inventive principle of the present invention is to realize the soft start of the bus voltage through the control of the input side relay and the power switch tube by the digital control unit of the UPS system, and finally provide stable energy for the inverter. A bus voltage soft start method in an uninterruptible power supply of the present invention comprises the following steps: S1, the energy is transferred to the positive and negative bus after power conversion, and is charged to the bus capacitor for soft start; S2, after the charging is completed, the mains energy is Power is supplied to the inverter after power conversion to generate an inverter voltage output; wherein the energy required for soft start is provided by a soft start energy supply circuit, and the soft start energy supply circuit includes a first relay, a second relay, a third relay, a resistor R and a DC source, the third relay is connected between the mains input terminal L and the a terminal o...

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Abstract

The invention relates to a method and a device of soft start of a bus voltage in an uninterruptible power supply. The method comprises the following steps: S1. transmitting energy after power conversion to a positive and negative bus, and charging the bus capacitance in a soft start manner; and S2. after charging is finished, supplying power to an inverter after the power conversion is carried out on city electric energy so as to generate contravariant voltage output, wherein, the energy needed by the soft start is provided by a soft start energy providing circuit which comprises a first relay, a second relay, a third relay, a resistance R and a direct-current source; the bus capacitance is charged in a soft start manner through controlling the starting or closing of the first relay, the second relay, and the third relay. The invention can be used in discharging topology of a non-segregated Boost type direct-current source, the control logic is simple, and the cost is lower.

Description

technical field [0001] The present invention relates to an uninterruptible power supply (UPS), more specifically, to a method and device for soft-starting a bus voltage in an uninterruptible power supply. Background technique [0002] With the advancement of power electronics technology and the rapid development of the IT industry in recent years, UPS has played an important role in data protection, and has also gained more and more widespread use in the fields of industry, communications, aerospace, military industry and family life. Application, UPS technology is in the stage of rapid development. [0003] The bus voltage soft start technology is an important part of the UPS system design. Its main function is to slowly increase the bus voltage to the voltage where the system can work normally when the UPS is turned on, and during this process, the system input and bus capacitance will not be generated. greater impact. Traditional bus voltage soft-start methods include t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02M1/36
Inventor 范小波豆飞进崔彬邴阳
Owner VERTIV CORP
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