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UPS supply device circuit for single-stage converter

A technology for power supplies and converters, applied in battery circuit devices, circuit devices, collectors, etc., can solve the problems of large space for circuit configuration, poor overall efficiency, and poor space utilization, so as to avoid occupying a large space Effect

Inactive Publication Date: 2003-03-12
DELTA ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) If the efficiency of the first-stage converter is η1 and the efficiency of the second-stage converter is η2, then the efficiency of the overall converter is η1×η2, so the overall efficiency is not good
[0006] (2) Two converters mean that two transformers need to be used, so it takes up a considerable space for circuit configuration
[0007] (3) When the mains power is cut off and enters the battery discharge mode, the AC / DC converter 11 will be idle, so the space utilization rate is not good

Method used

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  • UPS supply device circuit for single-stage converter
  • UPS supply device circuit for single-stage converter
  • UPS supply device circuit for single-stage converter

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Embodiment Construction

[0029] figure 2 It is a functional block diagram of the circuit of the uninterruptible power supply of the present invention. Its main components include a single-stage converter 21 integrating AC / DC and DC / DC functions, a battery 23 , a switching circuit 24 and a central processing unit (CPU) 25 . The single-stage converter 21 is used to convert the input AC voltage Vin (for example, 85 to 264 volts) into different output voltages, wherein the output Vc voltage charges the battery 23, and the output V1, V2, ... Vn The equal voltage is used by the load. Once the input AC power Vin is interrupted, exceeds or falls below the set voltage value, the CPU25 sends a signal to cut off the input AC power Vin, and the switch Sw2 is turned on by the switching circuit 24, which becomes the battery discharge mode and provides energy to the The converter 21 maintains the normal working voltages of V1, V2, . . . Vn, etc., for the load to continue to use.

[0030] The idea of ​​the presen...

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PUM

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Abstract

The circuit of the uninterruptible power system includes the bridge rectifier circuit and the transformer. The rectifier circuit commutes the AC voltage to the first DC voltage. The transformer converts the first DC voltage to the charge voltage and at least one DC output voltage. The charge voltage is utilized to charge batteries. The DC output voltage supplies the power for relevant at least one load. When the first DC voltage is cut off, the battery outputs the second DC voltage. Moreover, the second DC voltage is converted to at least one DC output voltage by the transformer.

Description

technical field [0001] The invention relates to a circuit of an uninterruptible power supply, especially a circuit of an uninterruptible power supply with a single-stage converter. Background technique [0002] Uninterrupted power supply (uninterrupted power supply, UPS) is a device connected between the power supply and the electrical equipment (load), the main purpose is when the power supply occurs such as low or high voltage, instantaneous surge, etc. When there is a problem, it can provide stable power to the load. Taking the application to personal computers or cash machines as an example, the uninterruptible power supply can win tens of minutes of buffer time for users when the mains power fails, enabling users to shut down according to normal procedures, avoiding data loss or system failure. damage. [0003] see Figure 1 , which is a functional block diagram of an existing uninterruptible power supply circuit, its main components include an AC / DC converter 11, a D...

Claims

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Application Information

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IPC IPC(8): H02J7/00
Inventor 何文榕郭国忠廖康佑
Owner DELTA ELECTRONICS INC
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