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1. 发明申请

US20180356132A1 AIR CONDITIONING SYSTEM AND AIR CONDITIONER HAVING THE SAME 审中-公开
公开(公告)号：US20180356132A1
公开(公告)日：2018-12-13
申请号：US15501108
申请日：2016-04-12
申请人： Guangdong Meizhi Compressor Co., Ltd.
发明人： Haiqun CHEN , Siqing LIAO , Linghua ZENG , Yanping WU
IPC分类号： F25B13/00 , F24F5/00 , F25B1/02 , F25B1/10 , F25B31/00 , F25B41/00 , F25B41/04 , F25B43/00
CPC分类号： F25B13/00 , F24F5/001 , F25B1/02 , F25B1/10 , F25B31/008 , F25B41/003 , F25B41/046 , F25B43/006 , F25B2341/0662 , F25B2400/061 , F25B2400/13 , F25B2400/23
摘要： An air conditioning system and an air conditioner having the same are provided. The air conditioning system comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, a directional control assembly, a first throttling element, a second throttling element, a gas-liquid separator and a liquid reservoir. The compressor comprises a first cylinder, a second cylinder, an exhaust port and a gas return port; an exhaust volume ratio of the second cylinder to the first cylinder is less than or equal to 0.1. The directional control assembly comprises a first valve port, a second valve port, a third valve port and a fourth valve port; when the air conditioning system is refrigerating, the first valve port is in communication with the second valve port, and the third valve port is in communication with the fourth valve port; when the air conditioning system is heating, the first valve port is in communication with third valve port, the second valve port is in communication with the fourth valve port, and a gas outlet of the gas-liquid separator is in communication with the second cylinder.

2. 发明申请

US20180175767A1 Motor Control System And Method And Device For Controlling Power Factor On Motor Side 审中-公开
公开(公告)号：US20180175767A1
公开(公告)日：2018-06-21
申请号：US15302599
申请日：2015-09-11
申请人： Guangdong Meizhi Compressor Co., Ltd.
发明人： Wanjie SONG , Xinjie REN , Siqing LIAO , Weimin XIANG , Yongjun FU
IPC分类号： H02P23/26 , H02P21/22 , H02P6/28 , H02K21/02 , H02K1/28 , H02P27/08
CPC分类号： H02P23/26 , H02K1/28 , H02K21/029 , H02P6/28 , H02P21/00 , H02P21/0089 , H02P21/22 , H02P27/08
摘要： The present disclosure provides a method and a device for controlling a power factor on motor side and a system having the same, and the method includes: controlling the motor using a control approach of Id′=0 so as to obtain quadrature-axis voltage Uq′ and direct-axis voltage Ud′ in a virtual coordinate system of a current control cycle; calculating a first control value according to Uq′ and Ud′; obtaining a power factor control target value, and calculating a target control value according to the power factor control target value; performing a PI control on a difference between the target control value and the first control value so as to obtain a coordinate deviation angle, and overlapping the coordinate deviation angle to a motor angle of the current control cycle so as to build a virtual coordinate system of a next control cycle, such that the power factor on the motor side is controllable.

3. 发明申请

US20160254772A1 A Method For Suppressing A Speed Fluctuation, A Control Apparatus And A Compressor Control System 有权
标题翻译：一种抑制速度波动的方法，一种控制装置和一种压缩机控制系统
公开(公告)号：US20160254772A1
公开(公告)日：2016-09-01
申请号：US14758469
申请日：2014-07-01
申请人： GUANGDONG MEIZHI COMPRESSOR CO., LTD.
发明人： Siqing LIAO , Xinjie REN , Wanjie SONG , Weimin XIANG , Jijiang YU , Cheng ZHANG , Hong GUO , Jingtao YANG
IPC分类号： H02P23/04 , H02P25/022
CPC分类号： H02P23/04 , H02P21/05 , H02P25/022 , H02P25/024
摘要： A method for suppressing a speed fluctuation of a permanent magnet synchronous motor is provided in the present disclosure, including: obtaining a target speed ω—ref, a feedback speed, a fluctuation speed Δω, a q-axis inductance Lq and a permanent magnet flux linkage φf of the permanent magnet synchronous motor; performing a PI adjusting on Δω to obtain a q-axis reference current Iq_ref, and obtaining a q-axis target voltage U*q according to Iq_ref, ω—ref, Δω and φf; performing a PI control on a q-axis actual voltage according to U*q to obtain a q-axis compensation current Iq_add; obtaining a d-axis target voltage U*d according to Iq_ref, Iq_add, ω—ref, Δω and Lq; performing a PI control on a d-axis actual voltage according to U*d to obtain a d-axis compensation current Id_add; superposing Iq_add and Iq_ref to perform a feedforward compensation on a q-axis current and superposing Id_add and the d-axis reference current to perform a feedforward compensation on a d-axis current.
摘要翻译：本发明公开了一种用于抑制永磁同步电机的速度波动的方法，包括：获得目标速度ω-ref，反馈速度，变动速度Δω，q轴电感Lq和永久磁通量永磁同步电动机的联动φf; 对Δω执行PI调整，得到q轴基准电流Iq_ref，根据Iq_ref，ω-ref，Δω，φf得到q轴目标电压U * q; 根据U * q对q轴实际电压进行PI控制，得到q轴补偿电流Iq_add; 根据Iq_ref，Iq_add，ω-ref，Δω和Lq获得d轴目标电压U * d; 根据U * d对d轴实际电压执行PI控制以获得d轴补偿电流Id_add; 叠加Iq_add和Iq_ref以对q轴电流执行前馈补偿，并叠加Id_add和d轴参考电流，以对d轴电流执行前馈补偿。

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