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Non-isolation type uninterruptible power supply device and control method thereof

A power supply device, non-isolated technology, applied in the direction of output power conversion device, electrical components, conversion equipment for intermediate conversion to DC conversion, etc.

Inactive Publication Date: 2012-05-16
LIAN ZHENG ELECTRONICS (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, since the system needs to be controlled in the flyback mode or the boost mode according to the input and output phase conditions, and the design of the inductor L1 must meet the requirements of both the flyback mode and the boost mode, there are certain restrictions on the circuit designer. and difficulty

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  • Non-isolation type uninterruptible power supply device and control method thereof
  • Non-isolation type uninterruptible power supply device and control method thereof
  • Non-isolation type uninterruptible power supply device and control method thereof

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no. 1 approach

[0081] As for the circuit action of the foregoing embodiments, it can be operated in the following modes according to the condition of the AC input power supply, which will be described below in conjunction with the first embodiment of the present invention:

[0082] 1. Paused Mode

[0083] The suspend mode of the present invention is applied when the condition frequency of the AC input power source 10 varies greatly, for example, the source is a generator with poor quality, which allows the present invention to accept any input power source with rapid frequency changes, thereby preventing the input voltage phase from Abnormal loop current caused when the output voltages are out of phase.

[0084] Image 6 It is a schematic diagram of the action sequence of the circuit of the present invention, referring to Image 6 In the two sections D and H, when the input power of the AC input power supply 10 is at a positive potential and the output power is at a negative potential, the...

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Abstract

The invention relates to a non-isolation type uninterruptible power supply device and a control method thereof. Only one DC (direct current) voltage bus is used; the direct connection of an output neutral line and an input neutral line is maintained; and when the duration of a phase difference between an output voltage and an input voltage is too long, high-efficient alternating current power supply constant voltage output can be still realized. According to the invention, when potentials of an alternating current input voltage and an alternating current output voltage are located at different positive and negative potential zones, a system is operated in a pause mode, so that the problem of occurrence of abnormal loop current is avoided; and when the potentials of the alternating current input voltage and the alternating current output voltage are located at the same positive and negative potential zone, the system is operated in a boost mode, so that high-efficient power output is obtained.

Description

technical field [0001] The present invention relates to a non-isolated uninterrupted power supply (UPS, Uninterrupted Power Supply) device and a control method thereof, and more particularly relates to a non-isolated UPS with only one DC voltage bus when the phase of the input AC power supply and the output AC power supply are different. Device problem. Background technique [0002] Generally, in the traditional uninterruptible power supply (UPS) system, according to whether the power supply device uses an isolated transformer (Isolated Transformer), the UPS can be divided into two types: isolated type and non-isolated type, because the input mains power is converted into frequency When the inverter (Inverter) is converted into power and supplied to the load, it is stipulated that the neutral line (Neutral) output by the inverter must maintain the characteristics of inputting the neutral line of the mains, so as to avoid the danger of electric shock (Electric Stock). In oth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/42H02M7/5387H02M1/32
Inventor 简明德
Owner LIAN ZHENG ELECTRONICS (SHENZHEN) CO LTD