Patents by Inventor Zhengzhong QIAO
Zhengzhong QIAO has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 11600417Abstract: A permanent magnet for a motor, a rotor assembly having the permanent magnet, a motor, and a compressor are disclosed. The permanent magnet has a Nd—Fe—B-based main phase. The main phase has a grain size of smaller than or equal to 4 micrometers. The mass ratio of dysprosium and/or terbium in the permanent magnet is less than or equal to 0.5%. The intrinsic coercivity Hcj of the permanent magnet at 25° C. satisfies Hcj?1500 kA/m. The permanent magnet according to embodiments of the present disclosure can have fewer or no heavy rare-earth elements, and meanwhile exhibit excellent performance, which improves the cost performance.Type: GrantFiled: May 13, 2020Date of Patent: March 7, 2023Assignee: ANHUI MEIZHI PRECISION MANUFACTURING CO., LTD.Inventors: Zhengzhong Qiao, Liyu Zheng, Xiaohua Qiu
-
Patent number: 11545864Abstract: An electric motor including a motor rotor and a motor stator including a stator core including a plurality of stator teeth spaced along a circumferential direction of the stator core, a plurality of coil groups, wherein each of the plurality of coil groups includes a plurality of coils wound on a corresponding stator tooth, and an incoming line terminal and an outgoing terminal both comprising a same number of coil ends, and two motor lead groups, wherein a number of the plurality of motor leads of each of the two motor lead groups is equal to a number of the plurality of coil groups, and wherein each of the plurality of motor leads is connected to one incoming line terminal or one outgoing line terminal of one corresponding coil group of the plurality of coil groups.Type: GrantFiled: January 14, 2020Date of Patent: January 3, 2023Assignee: GUANGDONG MEIZHI COMPRESSOR CO., LTD.Inventors: Fei Xu, Zhengzhong Qiao, Xiaohua Qiu
-
Patent number: 11496007Abstract: A permanent magnet motor and a compressor are provided. The motor has a rotor, a stator core, and a stator winding. A plurality of coupled coils are disposed on the stator core. The coil includes a first type coil and a second type coil. The stator winding is a three-phase stator winding. Each phase of the stator winding is provided with three joints In each phase, a first joint and a second joint are disposed on the first type coil, a third joint in the stator winding of each phase is disposed on the second type coil. The permanent magnet motor provided by the present disclosure can improve the efficiency of the motor and reduce noise.Type: GrantFiled: December 31, 2019Date of Patent: November 8, 2022Assignee: ANHUI MEIZHI PRECISION MANUFACTURING CO., LTD.Inventors: Fei Xu, Xiaohua Qiu, Zhengzhong Qiao
-
Patent number: 11486614Abstract: This present disclosure provides a compressor and a refrigeration device having the compressor. The refrigeration device has a coupling assembly and a frequency converter connected to one end of the coupling assembly. The compressor has a first shell and a permanent magnet motor. The permanent magnet motor is set in the first shell and connected to the other end of the coupling assembly. By designing the relevant parameters of the motor of the compressor, the efficiency of the motor and the compressor can be improved.Type: GrantFiled: May 6, 2020Date of Patent: November 1, 2022Assignee: GUANGDONG MEIZHI COMPRESSOR CO., LTD.Inventors: Zhengzhong Qiao, Fei Xu, Xiaohua Qiu, Linshu Mao, Chaocong Liu
-
Patent number: 11418081Abstract: A motor stator (11) for a compressor, a permanent magnet motor (10), and a compressor (A) are disclosed. The stator (11) includes: a stator core (111); a stator winding (112), the stator winding (112) including a plurality of coil groups, and each coil group having at least two connectors (1124); a lead-out wire (113) used to connect an external circuit and the stator winding (112), there being a plurality of lead-out wires (113) and each lead-out wire (113) being connected to connectors of at least two different coil groups, wherein the rated voltage between terminals on which a motor is mounted is Un, the maximum outer diameter of the stator core (111) is Dmax, and the axial length of the stator core (111) is L, Un/(Dmax2×L)?0.3 V/cm3.Type: GrantFiled: November 29, 2017Date of Patent: August 16, 2022Assignee: GUANGDONG MEIZHI COMPRESSOR CO., LTD.Inventors: Zhengzhong Qiao, Linshu Mao, Xiaohua Qiu, Yangbo Yu
-
Patent number: 11177705Abstract: Disclosed are a permanent magnet motor, a compressor and a refrigeration system. In the permanent magnet motor, the diameter D of a contour circle of the smallest inner periphery of a stator, the diameter d of a contour circle of the largest outer periphery of a rotor, the fundamental wave amplitude Bm1 of an air-gap flux density at an average gap between the stator and the rotor, the axial length L of the rotor, the total number of serially connected turns Ns of each phase winding, and a bus DC voltage Udc of a frequency converter supplying power to the permanent magnet motor before inversion are set as: 0.003 Udc?(D+d)×L×Bm1×Ns?0.008 Udc.Type: GrantFiled: December 30, 2019Date of Patent: November 16, 2021Assignee: GUANGDONG MEIZHI COMPRESSOR CO., LTD.Inventors: Zhengzhong Qiao, Linshu Mao, Xiaohua Qiu, Yangbo Yu
-
Publication number: 20210143690Abstract: A permanent magnet motor, a compressor and an air conditioner are disclosed. The permanent magnet motor has a stator and a rotor. The stator has a stator core and a stator winding. The rotor is spaced apart from the stator in an inner-outer direction. The rotor has a rotor core and a permanent magnet embedded in the rotor core. A maximum distance between an outer peripheral contour of a cross section of the rotor and a center of the cross section of the rotor is D1, an axial length of rotor core is L, and a rated power of permanent magnet motor is P. D 1, L and P satisfy: D1/L?1.7 and P/(D12×L) 8.5, and the unit of P is W, and the unit of D1 and L is cm.Type: ApplicationFiled: December 18, 2020Publication date: May 13, 2021Applicant: GUANGDONG MEIZHI COMPRESSOR CO., LTD.Inventors: Zhengzhong QIAO, Linshu MAO, Xiaohua QIU, Fei XU, Yulong WANG
-
Patent number: 11004585Abstract: A permanent magnet, a rotor, a motor and a compressor are provided. A work face of the permanent magnet includes a first edge and a second edge, a head endpoint of the first edge is connected to a tail endpoint of the second edge by means of a transition edge, the transition edge is located at a side, adjacent to a center of the work face, of a line connecting the head endpoint with the tail endpoint, and the transition edge includes at least one sub-arc segment, or a combination of at least one sub-arc segment and at least one sub-straight segment.Type: GrantFiled: November 26, 2018Date of Patent: May 11, 2021Assignee: GUANGDONG MEIZHI COMPRESSOR CO., LTD.Inventors: Zhengzhong Qiao, Linshu Mao, Minghu Yu
-
Publication number: 20200332787Abstract: A compressor and a refrigeration apparatus are provided. The housing of the compressor has a first terminal and a second terminal. The motor of the compressor has a stator, a first line group and a second line group. The first line group extends from a first position of an end face of the stator and is connected to the first terminal. The second line group extends from a second position of the end face and is connected to the second terminal. A midpoint between the first position and the second position defines a middle point. A plane passing through the middle point and an axis of an output shaft of the motor is defined as a middle plane. The first terminal and the first position are at one side of the middle plane. The second terminal and the second position are at the other side of the middle plane.Type: ApplicationFiled: July 2, 2020Publication date: October 22, 2020Applicant: GUANGDONG MEIZHI COMPRESSOR CO., LTD.Inventors: Zhengzhong QIAO, Xiaohua QIU, Linshu MAO, Fei XU, Yulong WANG
-
Publication number: 20200273612Abstract: A permanent magnet for a motor, a rotor assembly having the permanent magnet, a motor, and a compressor are disclosed. The permanent magnet has a Nd—Fe—B-based main phase. The main phase has a grain size of smaller than or equal to 4 micrometers. The mass ratio of dysprosium and/or terbium in the permanent magnet is less than or equal to 0.5%. The intrinsic coercivity Hcj of the permanent magnet at 25° C. satisfies Hcj?1500 kA/m. The permanent magnet according to embodiments of the present disclosure can have fewer or no heavy rare-earth elements, and meanwhile exhibit excellent performance, which improves the cost performance.Type: ApplicationFiled: May 13, 2020Publication date: August 27, 2020Applicant: ANHUI MEIZHI PRECISION MANUFACTURING CO., LTD.Inventors: Zhengzhong QIAO, Liyu ZHENG, Xiaohua QIU
-
Publication number: 20200263908Abstract: This present disclosure provides a compressor and a refrigeration device having the compressor. The refrigeration device has a coupling assembly and a frequency converter connected to one end of the coupling assembly. The compressor has a first shell and a permanent magnet motor. The permanent magnet motor is set in the first shell and connected to the other end of the coupling assembly. By designing the relevant parameters of the motor of the compressor, the efficiency of the motor and the compressor can be improved.Type: ApplicationFiled: May 6, 2020Publication date: August 20, 2020Applicant: GUANGDONG MEIZHI COMPRESSOR CO., LTD.Inventors: Zhengzhong QIAO, Fei XU, Xiaohua QIU, Linshu MAO, Chaocong LIU
-
Publication number: 20200153304Abstract: An electric motor including a motor rotor and a motor stator including a stator core including a plurality of stator teeth spaced along a circumferential direction of the stator core, a plurality of coil groups, wherein each of the plurality of coil groups includes a plurality of coils wound on a corresponding stator tooth, and an incoming line terminal and an outgoing terminal both comprising a same number of coil ends, and two motor lead groups, wherein a number of the plurality of motor leads of each of the two motor lead groups is equal to a number of the plurality of coil groups, and wherein each of the plurality of motor leads is connected to one incoming line terminal or one outgoing line terminal of one corresponding coil group of the plurality of coil groups.Type: ApplicationFiled: January 14, 2020Publication date: May 14, 2020Applicant: GUANGDONG MEIZHI COMPRESSOR CO., LTD.Inventors: Fei XU, Zhengzhong QIAO, Xiaohua QIU
-
Publication number: 20200153290Abstract: A permanent magnet motor and a compressor are provided. The motor has a rotor, a stator core, and a stator winding. A plurality of coupled coils are disposed on the stator core. The coil includes a first type coil and a second type coil. The stator winding is a three-phase stator winding. Each phase of the stator winding is provided with three joints In each phase , a first joint and a second joint are disposed on the first type coil, a third joint in the stator winding of each phase is disposed on the second type coil. The permanent magnet motor provided by the present disclosure can improve the efficiency of the motor and reduce noise.Type: ApplicationFiled: December 31, 2019Publication date: May 14, 2020Applicant: ANHUI MEIZHI PRECISION MANUFACTURING CO., LTD.Inventors: Fei XU, Xiaohua QIU, Zhengzhong QIAO
-
Publication number: 20200136448Abstract: Disclosed are a permanent magnet motor, a compressor and a refrigeration system. In the permanent magnet motor, the diameter D of a contour circle of the smallest inner periphery of a stator, the diameter d of a contour circle of the largest outer periphery of a rotor, the fundamental wave amplitude Bm1 of an air-gap flux density at an average gap between the stator and the rotor, the axial length L of the rotor, the total number of serially connected turns Ns of each phase winding, and a bus DC voltage Udc of a frequency converter supplying power to the permanent magnet motor before inversion are set as: 0.003 Udc?(D+d)×L×Bm1×Ns?0.008 Udc.Type: ApplicationFiled: December 30, 2019Publication date: April 30, 2020Applicant: GUANGDONG MEIZHI COMPRESSOR CO., LTD.Inventors: Zhengzhong QIAO, Linshu MAO, Xiaohua QIU, Yangbo YU
-
Publication number: 20200091789Abstract: A motor stator (11) for a compressor, a permanent magnet motor (10), and a compressor (A) are disclosed. The stator (11) includes: a stator core (111); a stator winding (112), the stator winding (112) including a plurality of coil groups, and each coil group having at least two connectors (1124); a lead-out wire (113) used to connect an external circuit and the stator winding (112), there being a plurality of lead-out wires (113) and each lead-out wire (113) being connected to connectors of at least two different coil groups, wherein the rated voltage between terminals on which a motor is mounted is Un, the maximum outer diameter of the stator core (111) is Dmax, and the axial length of the stator core (111) is L, Un/(Dmax2×L)?0.3 V/cm3.Type: ApplicationFiled: November 29, 2017Publication date: March 19, 2020Applicant: GUANGDONG MEIZHI COMPRESSOR CO., LTD.Inventors: Zhengzhong QIAO, Linshu MAO, Xiaohua QIU, Yangbo YU
-
Publication number: 20190123605Abstract: A permanent magnet, a rotor, a motor and a compressor are provided. A work face of the permanent magnet includes a first edge and a second edge, a head endpoint of the first edge is connected to a tail endpoint of the second edge by means of a transition edge, the transition edge is located at a side, adjacent to a center of the work face, of a line connecting the head endpoint with the tail endpoint, and the transition edge includes at least one sub-arc segment, or a combination of at least one sub-arc segment and at least one sub-straight segment.Type: ApplicationFiled: November 26, 2018Publication date: April 25, 2019Inventors: Zhengzhong QIAO, Linshu MAO, Minghu YU