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Double-closed-loop high-voltage power supply voltage regulation method based on purification current monitoring

A high-voltage power supply and current monitoring technology, applied in the direction of high-efficiency power electronic conversion, electrical components, output power conversion devices, etc. The effect of current reduction, stable voltage compensation, and reduction of operation and maintenance costs

Active Publication Date: 2020-12-18
长兴友邦电器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Disadvantages of LLC resonant non-constant voltage power supply: Because the operating frequency of the circuit is affected by the load, different loads or different working periods, the output high-voltage voltage and high-voltage current are different. The smaller the current, the higher the high voltage. higher
[0006] However, although the closed-loop constant voltage technology has obvious advantages, there are still defects: due to the closed-loop constant voltage scheme, no matter how the load current changes, the output high voltage of the power supply remains unchanged
Since the high pressure remains unchanged, the output power decreases accordingly, resulting in a decrease in purification efficiency, and almost no purification in severe cases

Method used

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  • Double-closed-loop high-voltage power supply voltage regulation method based on purification current monitoring
  • Double-closed-loop high-voltage power supply voltage regulation method based on purification current monitoring
  • Double-closed-loop high-voltage power supply voltage regulation method based on purification current monitoring

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Effect test

Embodiment 1

[0047] Such as Figure 1 to Figure 5 As shown, a double closed-loop high-voltage power supply voltage regulation method based on purification current monitoring includes the following steps:

[0048] S1, boosting the main circuit, the main circuit boosting includes a power supply device 11 for providing power, an oscillation circuit 12 electrically connected to the power supply device 11 and reversely processing the current, and electrically connected behind the oscillation circuit 12 The power regulation module 13 at the end, the drive circuit 14 electrically connected to the power regulation module 13 to amplify the pulse signal, and the high-voltage output circuit 15 provided at the output end of the drive circuit 14, the high-voltage output circuit 15 provides high-voltage power to the load device 16;

[0049] S2, constant voltage closed-loop control, the constant voltage closed-loop control includes a voltage detection module 21 that detects the voltage value of the high...

Embodiment 2

[0081] Such as Image 6 with 7 As shown, the components that are the same as or corresponding to those in the first embodiment are marked with the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the differences from the first embodiment will be described below. The difference between this embodiment two and embodiment one is:

[0082] In this embodiment, the compensation voltage of the setting compensation unit 32 adopts a step-up step-up method of a constant voltage value.

[0083] It should be noted that when the working current is reduced to the threshold setting value, step boosting with a constant voltage value can instantaneously boost the voltage of the main circuit and increase the working power.

[0084] It is worth mentioning that the step boost can be set in a multi-stage boost mode, which is convenient for multi-level compensation and compensates for the power drop caused by the gradual drop in operating current.

Embodiment 3

[0086] Such as figure 1 , 8 As shown, the same or corresponding parts as in Embodiment 1 or Embodiment 2 adopt the corresponding reference numerals as in Embodiment 1 or Embodiment 2. For the sake of simplicity, only the differences from Embodiment 1 or Embodiment 2 are described below. point. The difference between this embodiment three and embodiment one or embodiment two is:

[0087] Further, the setting compensation unit 32 also includes an operational amplifier U1B321, a threshold setting group 324 and a cleaning signal group 325, and the operational amplifier U1B321 is electrically connected to the bias amplification group 322 and the electronic switch group 323 respectively, and the The threshold setting group 324 is electrically connected to the bias amplification group 322, the electronic switch group 323 and the cleaning signal group 325 respectively, the bias amplification group 322 determines the voltage compensation value, and the electronic switch group 323 con...

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PUM

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Abstract

The invention provides a double-closed-loop high-voltage power supply voltage regulation method based on purification current monitoring. The method is characterized in that the method comprises the following steps: S1, the boosting of a main loop; S2, constant-voltage closed-loop control, wherein the constant-voltage closed-loop control comprises a voltage detection module, a conventional constant-voltage module and an adder circuit; S3, undercurrent compensation closed-loop control: specifically, the undercurrent compensation closed-loop control comprises an output current detection unit anda setting compensation unit, when a current signal detected by the output current detection unit is lower than a threshold set value of the setting compensation unit, the setting compensation unit judges and controls to be conducted to the summing circuit, or otherwise, the setting compensation unit is cut off. According to the technical scheme, the under-current compensation closed-loop controlis matched with constant-voltage closed-loop control to output voltage, voltage compensation is carried out on the output voltage, and high-voltage current is automatically enhanced, so that the output current of the high-voltage power supply is improved, the normal purification effect is maintained, the cleaning period of the purifier is prolonged, and the operation and maintenance cost is reduced.

Description

technical field [0001] The invention relates to the technical field of drive power supplies for purifiers, in particular to a dual closed-loop high-voltage power supply voltage regulation method based on purification current monitoring. Background technique [0002] With the development of social and economic level, people have increasingly higher requirements for their own living environment. In recent years, the continuous occurrence of air pollution incidents has greatly promoted the public's demand and understanding of air purifiers. The existing air Most of the purifiers are equipped with a high-voltage power supply, especially the purifiers that deal with a lot of oil fumes, which have very high requirements for high-voltage power supplies. The first generation of purification power supply adopts LLC resonant non-constant voltage technology. The second-generation purification power supply adopts closed-loop constant voltage technology. [0003] The characteristic of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/00
CPCH02M1/00H02M1/0012Y02B70/10
Inventor 缪仙荣姜爱华
Owner 长兴友邦电器有限公司