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Patent Searching and Data


Title:
ELECTRIC MOTOR CONTROL SYSTEM AND INVERTER AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2019/085106
Kind Code:
A1
Abstract:
An electric motor control system and an inverter air conditioner. The electric motor control system comprises a rectifier (2), a filter circuit (6), an operation control portion (5), several inverters (4, 8), and current sampling portions (11, 12) and electric motors (7, 9), which are correspondingly connected to the several inverters (4, 8), wherein the operation control portion (5) comprises one AD sampling unit; time-sharing sampling is performed on a phase current signal of each electric motor (7, 9) by means of the AD sampling unit; and rising half-periods or falling half-periods, corresponding to the sampling of the phase current of each electric motor, of each triangular wave are staggered in terms of time, thus avoiding a collision caused when line currents of multiple electric motors (7, 9) are sampled by means of the one AD sampling unit of the operation control portion (5), and successfully realizing the time-sharing sampling, based on the one AD sampling unit, of the phase currents of the several electric motors (7, 9), thereby controlling, based on a low-cost MCU having only one AD sampling unit, the several electric motors (7, 9).

Inventors:
HUO, Junya (Lingang Road, Beijiao Shund, Foshan Guangdong 1, 528311, CN)
HUANG, Zhaobin (Lingang Road, Beijiao Shund, Foshan Guangdong 1, 528311, CN)
Application Number:
CN2017/113374
Publication Date:
May 09, 2019
Filing Date:
November 28, 2017
Export Citation:
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Assignee:
GD MIDEA ARI-CONDITIONING EQUIPMENT CO., LTD. (Lingang Road, Beijiao Shund, Foshan Guangdong 1, 528311, CN)
MIDEA GROUP CO., LTD. (B26-28F, Midea Headquarter BuildingNo. 6 Midea Avenue, Beijiao, Shund, Foshan Guangdong 1, 528311, CN)
International Classes:
H02P5/74; H02P21/14; H02P21/22; H02P27/08
Foreign References:
CN207427006U2018-05-29
CN106687751A2017-05-17
CN105548676A2016-05-04
CN101729002A2010-06-09
US20070013325A12007-01-18
US20040130284A12004-07-08
Attorney, Agent or Firm:
CENFO INTELLECTUAL PROPERTY AGENCY (201 Auto Electric Power Building, North Zone High-Tech Industrial Park,No.3 Songping Mountain Road, Yuehai Street, Nanshan Distric, Shenzhen Guangdong 7, 518057, CN)
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