Title:
PHASE MEASUREMENT METHOD AND SYSTEM FOR BUS VOLTAGE RIPPLE OF AIR CONDITIONER COMPRESSOR
Document Type and Number:
WIPO Patent Application WO/2023/030179
Kind Code:
A1
Abstract:
A phase measurement method and system for a bus voltage ripple of an air conditioner compressor. Measurement is performed after power factor correction (PFC) is started. The measurement method comprises: acquiring the current instantaneous value Iac of an alternating-current power supply of a compressor (S1); calculating the current peak value Ipeak of the alternating-current power supply (S2); setting a comparison current Idetect = Ipeak * sinθ (S3), wherein the value range of θ is (0, π/2); when Iac ≥ Idetect, outputting the phase of the alternating-current power supply at the current moment as θ (S5); and calculating the phase Ψ of a bus voltage ripple at the current moment according to the phase θ of the alternating-current power supply (S6). By means of the method, there is no need to provide a phase measurement hardware circuit, and only an existing current measurement circuit for an alternating-current power supply needs to be used to measure the instantaneous value of the alternating-current power supply, and then the phase of the alternating-current power supply and the phase of a direct-current bus voltage ripple can be measured and tracked by means of software. The method has a simple algorithm, occupies a small number of MCU resources, saves on the resource overheads of a chip, and is easily implemented.
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Inventors:
LIU YUNTAO (CN)
SHI WEIPIN (CN)
XU QINYAO (CN)
LI XIANGJUN (CN)
SONG YANFENG (CN)
DONG JINSHENG (CN)
XU BEIBEI (CN)
SHI WEIPIN (CN)
XU QINYAO (CN)
LI XIANGJUN (CN)
SONG YANFENG (CN)
DONG JINSHENG (CN)
XU BEIBEI (CN)
Application Number:
PCT/CN2022/115020
Publication Date:
March 09, 2023
Filing Date:
August 26, 2022
Export Citation:
Assignee:
QINGDAO HAIER AIR CONDITIIONER GENERAL CORP LTD (CN)
QINGDAO HAIER AIR CONDITIONING ELECTRONIC CO LTD (CN)
HAIER SMART HOME CO LTD (CN)
QINGDAO HAIER AIR CONDITIONING ELECTRONIC CO LTD (CN)
HAIER SMART HOME CO LTD (CN)
International Classes:
G01R25/00
Foreign References:
| CN113625052A | 2021-11-09 | |||
| CN104991110A | 2015-10-21 | |||
| CN109804546A | 2019-05-24 | |||
| CN104836462A | 2015-08-12 | |||
| CN113162395A | 2021-07-23 | |||
| CN106645880A | 2017-05-10 | |||
| JP2017112822A | 2017-06-22 | |||
| US20170170745A1 | 2017-06-15 |
Attorney, Agent or Firm:
QINGDAO LZ PATENT AND TRADEMARK OFFICE CO., LTD. (CN)
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