Title:
METHOD AND DEVICE FOR OBTAINING EFFECTIVE VALUE OF ALTERNATING CURRENT VOLTAGE OF PFC POWER SUPPLY
Document Type and Number:
WIPO Patent Application WO/2018/232818
Kind Code:
A1
Abstract:
A method and device for obtaining an effective value of an alternating current voltage of a power factor correction (PFC) power supply. The method for obtaining an effective value of an alternating current voltage of a PFC power supply comprises the following steps: acquiring current operating parameters of a PFC power supply (S100); when the current operating parameters of the PFC power supply meet a condition for a power factor correction circuit of the PFC power supply to be turned off, controlling the power factor correction circuit of the PFC power supply to turn off, and according to the voltage of two ends of an electrolytic capacitor, obtaining a peak value of an input alternating current voltage of the PFC power supply (S200); when the current operating parameters of the PFC power supply meet a condition for the power factor correction circuit of the PFC power supply to be turned on, controlling the power factor correction circuit to turn on, and according to an operating mode of the power factor correction circuit, obtaining an instantaneous value of the input alternating current voltage of the PFC power supply (S300); according to the peak value of the input alternating current voltage or the instantaneous value of the input alternating current voltage, calculating an effective value of the alternating current voltage of the PFC power supply (S400). The method and device have the characteristic of high accuracy.
Inventors:
HUANG ZHAOBIN (CN)
Application Number:
PCT/CN2017/094173
Publication Date:
December 27, 2018
Filing Date:
July 24, 2017
Export Citation:
Assignee:
GUANGDONG MIDEA REFRIGERATION APPLIANCES CO LTD (CN)
International Classes:
H02M1/42
Foreign References:
| CN104682690A | 2015-06-03 | |||
| CN106533152A | 2017-03-22 | |||
| CN102356537A | 2012-02-15 | |||
| CN105091252A | 2015-11-25 | |||
| JP2016073030A | 2016-05-09 | |||
| US9219408B2 | 2015-12-22 | |||
| CN107276385A | 2017-10-20 |
Attorney, Agent or Firm:
CENFO INTELLECTUAL PROPERTY AGENCY (CN)
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