Voltage surge protection device and method for PFC circuit in frequency conversion household appliances

A technology for home appliances, voltage swell, applied in output power conversion devices, high-efficiency power electronic conversion, electrical components, etc., can solve problems affecting user comfort and experience, frequent start and stop, frequent disturbances, etc. performance and user experience, guarantee non-stop work, and improve the effect of user experience

Active Publication Date: 2018-07-13
GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1
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  • Summary
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, for terminal power grids or distributed power grids, such as township and rural power grids, it is difficult for household appliances to work normally and stably due to unstable grid voltage and frequent disturbances, especially frequency conversion household appliances, which are prone to frequent start and stop conditions. Neither can save power, but also greatly affect the user's comfort and experience

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  • Voltage surge protection device and method for PFC circuit in frequency conversion household appliances
  • Voltage surge protection device and method for PFC circuit in frequency conversion household appliances
  • Voltage surge protection device and method for PFC circuit in frequency conversion household appliances

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Embodiment Construction

[0031]Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0032] A voltage surge protection device for a PFC circuit in a variable frequency household appliance and a voltage surge protection method for a PFC circuit in a variable frequency household appliance according to embodiments of the present invention will be described below with reference to the accompanying drawings.

[0033] figure 1 It is a schematic block diagram of a voltage surge protection device for a PFC circuit in a variable frequency household electrical appliance according to an embodiment of the present invention, w...

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Abstract

A device and method for protecting a voltage surge of a PEC circuit in a variable-frequency household electric apparatus, the device comprising: a first voltage detection module (30) used to detect an input voltage of the PEC circuit; a current detection module (40) used to detect an input current of the PEC circuit; a second voltage detection module (50) used to detect an output voltage of the PEC circuit; a protection module (60) used to compare the input voltage and the output voltage and generate a first comparison result and compare the input current and a preset maximum allowable current to generate a second compare result and respectively control, according to the first compare result and the second compare result, the PEC circuit via a PEC control module (10) and a motor via a motor controller (20). The protection device can prevent the PEC circuit from being damaged and the machine from stopping when a voltage surge occurs.

Description

technical field [0001] The present invention relates to the technical field of air-conditioning systems, in particular to a voltage surge protection device for a PFC (Power Factor Correction, power factor correction) circuit in frequency conversion household appliances and a voltage surge protection device for PFC circuits in frequency conversion household appliances method. Background technique [0002] Frequency conversion is gradually becoming the trend of home appliances, especially air conditioners, refrigerators and washing machines. The frequency conversion technology can greatly save the power consumption of home appliances, and has the advantages of low noise and high performance. [0003] Since the frequency conversion requires DC power supply, and the general city power is 220V AC, it is necessary to convert the AC power into DC power through a rectifier circuit and a booster circuit to supply power to the load. In addition, in order to reduce the current harmoni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/32H02M1/42H02P27/06
CPCH02M1/32Y02B70/10
Inventor 盛爽
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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