Push-pull converter and method for power supply device and uninterrupted power supply system

A power supply, push-pull technology, applied in conversion equipment with intermediate conversion to AC, control/regulation system, DC power input conversion to DC power output, etc., can solve problems such as high conduction loss

Inactive Publication Date: 2005-03-09
DELTA ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the selection of the resonance depth of this circuit is very important, otherwise it will lead to higher conduction loss

Method used

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  • Push-pull converter and method for power supply device and uninterrupted power supply system
  • Push-pull converter and method for power supply device and uninterrupted power supply system
  • Push-pull converter and method for power supply device and uninterrupted power supply system

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Embodiment Construction

[0044] On the basis of fully studying the discharge characteristics of the battery, the present invention first clarifies a special working mode very suitable for the DC-DC converter in the UPS system. According to this working mode, a method of using the transformer excitation current to realize the zero-voltage switching of the primary side circuit of the Push-Pull converter is proposed when the UPS system is heavy-loaded, or when the battery is light-loaded and the battery is in the late stage of discharge, which reduces the switching time of the circuit. Loss, contribute to the improvement of UPS system efficiency.

[0045] Special working mode of DC-DC converter in UPS system:

[0046] For the DC-DC converter in the UPS system, its output does not need to be stabilized within a certain range, and the stability of the UPS output voltage can be guaranteed by the post-stage inverter. According to this concept, a special working mode of the DC-DC converter in the UPS system ...

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Abstract

This invention provides a zero-voltage switch push-pull converter and a method for continuous supplying power system of a power source supplier, in which, the converter includes a transformer containing a primary winding with a central tap and a secondary winding, an electric energy storage supply device, one end of which is connected with the central tap of the primary winding, the other end to the earth, a first master switch element, the first end of which is linked to the first end of the primary winding, and the second to the earth, a second master switch element, its first end to the earth, the second to a second end of the primary winding and a commutating circuit connected to the second winding to convert AC to DC provided by it to let the primary circuit element switch at zero voltage.

Description

technical field [0001] The invention relates to a zero-voltage switching push-pull (Push-Pull) converter and a method for a power supply and an uninterruptible power supply system, especially a push-pull (Push-Pull) converter whose primary side The circuit switches at zero voltage. Background technique [0002] For an online uninterruptible power supply system (UPS), there are generally three working modes: online mode, backup mode and bypass mode. In the backup power supply mode, the battery supplies power to the load through a DC-DC converter and an inverter. Usually, the DC-DC converter converts and boosts the battery voltage to the voltage value required by the DC bus; and the inverter converts the DC voltage of the DC bus into an AC voltage output. [0003] Limited by the voltage value of a single battery, the battery packs in the UPS system generally adopt a series power supply mode. In order to improve the reliability of the system, the number of batteries connecte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/28H02M3/337
CPCY02B70/1491Y02B70/10
Inventor 应建平林桦朱秋花蔡文荫
Owner DELTA ELECTRONICS INC
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