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A 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, operation and maintenance cost reduction, and voltage compensation stability

Active Publication Date: 2022-07-08
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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  • A double-closed-loop high-voltage power supply voltage regulation method based on purification current monitoring
  • A double-closed-loop high-voltage power supply voltage regulation method based on purification current monitoring
  • A double-closed-loop high-voltage power supply voltage regulation method based on purification current monitoring

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Effect test

Embodiment 1

[0047] like 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, the main circuit boosting, the main circuit boosting includes a power supply device 11 for supplying power, an oscillator circuit 12 that is electrically connected to the power supply device 11 and performs reverse processing of the current, and is electrically connected to the oscillator circuit 12. The power conditioning module 13 at the end, the driving circuit 14 electrically connected to the power conditioning module 13 to amplify the pulse signal, and the high-voltage output circuit 15 arranged at the output end of the driving circuit 14, the high-voltage output circuit 15 provides the high-voltage power supply 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 detec...

Embodiment 2

[0081] like Image 6 and 7 As shown, the same or corresponding components as those in the first embodiment are given the corresponding reference numerals as in the first embodiment. For the sake of brevity, only the points of difference from the first embodiment are described below. The difference between the second embodiment and the first embodiment is:

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

[0083] It should be noted that when the working current is reduced to the threshold set value, a constant voltage value step boost is adopted, which can instantly boost the voltage of the main circuit and increase the working power.

[0084] It is worth mentioning that the step boost can set a multi-stage boost mode, which is convenient for multi-level compensation and makes up for the power drop caused by the gradual decrease of the working current.

Embodiment 3

[0086] like figure 1 , 8 As shown in the figure, the same or corresponding parts as those in the first embodiment or the second embodiment use the corresponding reference numerals as the first embodiment or the second embodiment. For the sake of brevity, only the differences from the first embodiment or the second embodiment are described below. point. The difference between the third embodiment and the first embodiment or the second embodiment is:

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

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Abstract

The present invention provides a double closed-loop high-voltage power supply voltage regulation method based on purification current monitoring, which is characterized by comprising the following steps: S1, boosting the main circuit; S1, constant voltage closed-loop control, the constant-voltage closed-loop control includes a voltage detection module , conventional constant voltage module and adding circuit; S1, undercurrent compensation closed-loop control, the undercurrent compensation closed-loop control includes an output current detection unit and a setting compensation unit, the current signal detected by the output current detection unit is lower than the setting compensation unit When the threshold value of the unit is set, the tuning compensation unit judges and controls to be turned on to the adding circuit, otherwise, it is turned off. By using undercurrent compensation closed-loop control and constant voltage closed-loop control of the output voltage, the output voltage is voltage compensated, and the high-voltage current is automatically enhanced, so that the output current of the high-voltage power supply is increased, the normal purification effect is maintained, the cleaning cycle of the purifier is prolonged, and the Operation and maintenance costs.

Description

technical field [0001] The invention relates to the technical field of purifier driving power supplies, in particular to a double-closed-loop high-voltage power supply voltage regulation method based on purifying current monitoring. Background technique [0002] With the development of the social and economic level, people have increasingly higher requirements for their living environment. In recent years, the continuous occurrence of air pollution incidents has greatly promoted the public's demand and understanding of air purifiers. Most of the purifiers are equipped with high-voltage power supplies, especially purifiers that deal with more oil fume, 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 LLC resonant non-constant volt...

Claims

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Application Information

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Patent Type & Authority Patents(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