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Adaptive wide-voltage input AC/DC power supply system and operating method thereof

A technology of DC power supply and working method, applied in the direction of converting AC power input to DC power output, irreversible AC power input converting to DC power output, electrical components, etc. problem, to achieve the effect of simple control logic and reduced efficiency

Inactive Publication Date: 2018-08-10
SHANDONG CHAOYUE DATA CONTROL ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the patent has a boost and flyback two-stage conversion circuit, and the circuit design complexity is high; when the input voltage is low, the voltage needs to undergo two-stage power conversion, and the loss is large, which affects the efficiency

Method used

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  • Adaptive wide-voltage input AC/DC power supply system and operating method thereof

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Embodiment 1

[0034] An adaptive wide-voltage input AC / DC power supply system, such as figure 1 As shown, including: multi-tap transformer, input voltage detection circuit, single-chip microcomputer, MOSFET for controlling the on-off of multi-tap transformer, AC / DC converter;

[0035] The multi-tap transformer, MOSFET, input voltage detection circuit, and single-chip microcomputer are connected in sequence; the MOSFET is connected to the AC / DC converter.

Embodiment 2

[0037] The working method of the AC / DC power supply system described in Embodiment 1 includes: sampling and analyzing the input voltage through the input voltage detection circuit, controlling the combined on-off of multiple MOSs, adjusting the turn ratio of the transformer, and controlling the input voltage at AC / DC converter acceptable range.

[0038] The MOS tube is connected to each tap of the multi-tap transformer. By controlling the turn-on and turn-off of the MOS tube, the number of turns connected to the primary side of the transformer is determined, and then the turn ratio between the primary and secondary turns of the transformer is controlled, and then the input voltage is converted according to the correct turn ratio. It is within the acceptable working range of the latter stage AC / DC converter.

Embodiment 3

[0040] According to the working method of the AC / DC power supply system described in Embodiment 2, comprising:

[0041] The input voltage is sampled and analyzed through the input voltage detection circuit, that is, the AD converter collects the input voltage, and sends this data to the microcontroller for calculation, including:

[0042] Multiple MOSs include 4 MOSs, namely MOS tube T1, MOS tube T2, MOS tube T3, and MOS tube T4;

[0043] The input voltage detection circuit samples the input voltage, sends the collected voltage information to the single-chip microcomputer control chip for analysis and judgment, and controls the on-off of MOS tube T1, MOS tube T2, MOS tube T3, and MOS tube T4 by means of table lookup. which is:

[0044]When the input voltage is detected to be 85V-264V, the microcontroller drives MOS tube T4 to turn on, MOS tube T1, MOS tube T2, and MOS tube T3 are turned off, the transformer turns ratio is 1:1, and the secondary output voltage of the transform...

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Abstract

The invention relates to an adaptive wide-voltage input AC / DC power supply system and an operating method thereof. According to the invention, sampling analysis is performed on input voltage through avoltage sampling circuit, then the turn ratio of a multi-tap transformer is adjusted through an MOS transistor, and the input voltage of a post-stage AC / DC converter is controlled to be within an acceptable range. According to characteristics of the transformer, firstly an AD converter collects the input voltage when the system is powered on, the data is transmitted to a single-chip microcomputerfor calculation, and then the on-off of the MOS transistor is controlled through controlling the logic level of a GPIO port. The MOS transistor is connected with each tap of the multi-tap transformer, the primary and secondary turn ratio of the transformer is decided through controlling the on-off of the MOS transistor, and thus the input voltage is converted to be within a normal operating rangeof the post-stage AC / DC converter according to the correct turn ratio.

Description

technical field [0001] The invention relates to an adaptive wide-voltage input AC / DC power supply system and a design method thereof, belonging to the technical field of power supplies. Background technique [0002] The complexity of industrial systems is getting higher and higher, and the application of advanced technology requires high-efficiency and high-quality switching power supplies. For industrial power supplies with an input voltage range of 85V to 825V, the use of conventional AC / DC converters cannot meet the requirements. Cause the output voltage to be unstable, or directly burn the power supply equipment. [0003] Commonly used industrial system power supply equipment will select the appropriate AC / DC switching power supply according to the range of input voltage. At the same time, the power supply range is narrower 85V~264V and other changes within 200V. However, this method has certain defects, and the input voltage is not A fixed value will cause large voltag...

Claims

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Application Information

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IPC IPC(8): H02M7/04
CPCH02M7/043H02M1/0012H02M1/0083
Inventor 戴晓龙徐成焱于豪光张丽
Owner SHANDONG CHAOYUE DATA CONTROL ELECTRONICS CO LTD
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