MOTOR VARIABLE FREQUENCY DRIVING SYSTEM AND MULTI-SPLIT CENTRAL AIR CONDITIONER - GD MIDEA HEATING & VENTILATING EQUIPMENT CO LTD

Title:

MOTOR VARIABLE FREQUENCY DRIVING SYSTEM AND MULTI-SPLIT CENTRAL AIR CONDITIONER

Document Type and Number:

WIPO Patent Application WO/2020/038038

Kind Code:

A1

Abstract:

Disclosed are a motor variable frequency driving system and a multi-split central air conditioner. The motor variable frequency driving system comprises: a three-phase alternating-current input (102), a rectification module (104), a thin-film capacitor (106), an inverter (108), a vector control module (110), an A/D sampling module (112) and a steady state processing module (114). The rectification module (104) is connected to the three-phase alternating-current input (102); the thin-film capacitor (106) is arranged between output ends of a direct current output; an input end of the inverter (108) is connected to an output end of the direct current output; an output end of the inverter (108) is connected to a three-phase alternating current motor; the vector control module (110) is connected to the inverter (108); the A/D sampling module (112) is used for collecting direct current bus voltages of two ends of the thin-film capacitor (106); and the steady state processing module is connected to the A/D sampling module (112).

Inventors:

ZHOU CHAO (CN)
KOKURA TAKESHI (CN)
QIAN XIONG (CN)

Application Number:

PCT/CN2019/089190

Publication Date:

February 27, 2020

Filing Date:

May 30, 2019

Export Citation:

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Assignee:

GD MIDEA HEATING & VENTILATING EQUIPMENT CO LTD (CN)
MIDEA GROUP CO LTD (CN)

International Classes:

H02P21/22; H02P21/18; H02P27/08

Foreign References:

CN108923721A	2018-11-30
CN102017395A	2011-04-13
CN106330039A	2017-01-11
CN106655954A	2017-05-10
JP2016082662A	2016-05-16

Other References: