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1. 发明授权

US10784805B1 System and method for interior permanent magnet synchronous motor control from zero or low speed 有权
公开(公告)号：US10784805B1
公开(公告)日：2020-09-22
申请号：US16795074
申请日：2020-02-19
申请人： Wolong Electric Group Co. Ltd.
发明人： Radu Bojoi , Zheng Zhang , Ze Jiang
IPC分类号： H02P21/34 , H02P21/13 , H02P21/22 , H02P21/18
摘要： A system and method for robust control of a sensorless interior permanent magnet synchronous motor. The system and method includes rotor characteristic detection to detect or estimate rotor position, rotor speed, and rotor magnetic polarity based on rotor magnetic anisotropy or saliency. Detecting rotor magnetic polarity allows determination of orientation of the rotor and, for a rotor in motion, direction of travel. A high frequency injection enables rotor position detection and an alternating carrier method enables detection of rotor magnetic polarity. The system and method can also include closed loop startup control from a standstill condition following detection of rotor characteristics.

2. 发明授权

US10305409B2 High-low-voltage conversion star multi-phase variable-frequency drive system 有权
公开(公告)号：US10305409B2
公开(公告)日：2019-05-28
申请号：US15763250
申请日：2016-02-22
申请人： Wolong Electric Group Co., Ltd.
发明人： Jianqiao Wang , Xuandong Wu , Chenlong Lian , Weican Yan
IPC分类号： H02P23/12 , H02P23/28 , H02P25/18 , H02P25/20 , H02P27/06 , H02P29/50 , H02P29/028
摘要： The present invention provides a high-low-voltage conversion star multi-phase variable-frequency drive system and relates to a high-voltage high-power motor and drive control thereof. The variable-frequency drive technical solution which is commonly used at present mainly has the disadvantages that a frequency converter is added to a common motor, the insulation life of the motor is short and the heat dissipating ability of the motor is poor. The system comprises a phase-shifting transformer, rectifying circuits, inverter circuits, a multi-phase motor, and a control circuit connected with the phase-shifting transformer, the rectifying circuits, the inverter circuits and the multi-phase motor, wherein primary windings of the phase-shifting transformer are connected with an alternating-current power source, and secondary windings of the phase-shifting transformer are connected with the rectifying circuits; and is characterized in that the number of the secondary windings is the same as the number of the rectifying circuits, one secondary winding is connected with one rectifying circuit, all rectifying circuits are in common-ground connection to form a common-ground direct-current power source, and output ends of the rectifying circuits are connected with the inverter circuits. By adopting the technical solution, high voltage and large currents are realized, simultaneously the structure is simple, the insulation requirement is lowered, the heat dissipating ability of the motor is improved and the power density is increased.

3. 发明申请

US20220209599A1 SURFACE-MOUNTED HIGH-SPEED PERMANENT MAGNET SYNCHRONOUS ROTOR 有权
公开(公告)号：US20220209599A1
公开(公告)日：2022-06-30
申请号：US17246647
申请日：2021-05-02
申请人： WOLONG ELECTRIC GROUP CO., LTD. , ZHEJIANG LONGCHUANG MOTOR TECHNOLOGY INNOVATION CO., LTD. , WOLONG ELECTRIC (SHANGHAI) CENTRAL RESEARCH INSTITUTE CO., LTD.
发明人： Freddy GYLLENSTEN , Youyao DU , George GAO , Yue GAO , Lijun LIU , Chunzhi DENG , Bin LU , Zhongqi LIU
IPC分类号： H02K1/27 , H02K1/28 , H02K21/14
摘要： A surface-mounted high-speed permanent magnet synchronous rotor includes a rotor shaft, multiple permanent magnet sets, multiple silicon steel piece sets and a rotor iron core sleeve. The multiple permanent magnet sets and the multiple silicon steel piece sets are glued on a surface of the rotor shaft along an axis of the rotor shaft. The multiple permanent magnet sets and the multiple silicon steel piece sets are spaced around the rotor shaft. The multiple permanent magnet sets have a same outer diameter as the multiple silicon steel piece sets, and the multiple permanent magnet sets and the multiple silicon steel piece sets are sleeved with the rotor iron core sleeve.

4. 发明申请

US20220181945A1 MOTOR AND ELECTRIC APPARATUS INCLUDING THE SAME 有权
公开(公告)号：US20220181945A1
公开(公告)日：2022-06-09
申请号：US17536976
申请日：2021-11-29
申请人： WOLONG ELECTRIC GROUP CO., LTD.
发明人： Tatsuo Maetani , Yoshinori Isomura , Feng Hu
IPC分类号： H02K5/173 , H02K7/08 , H02K11/33 , H02K21/14 , F16C35/06 , F04D25/06
摘要： A motor according to the present disclosure includes a stator that includes a stator core around which a stator winding is wound; a rotating body that holds a plurality of magnets in a circumferential direction facing the stator or holds a plurality of magnets in a spoke shape from a center; a rotor that includes the rotating body, and a shaft fastened to the rotating body such that the shaft penetrates a center of the rotating body; two bearings that support the rotating body; a first metal bracket that fixes one bearing of the two bearings; and a second metal bracket that fixes the other bearing of the two bearings, and a capacitive member that has a capacitance Csb1sb2 and is located between the first metal bracket and the second metal bracket.

5. 发明申请

US20180287541A1 HIGH-LOW-VOLTAGE CONVERSION STAR MULTI-PHASE VARIABLE-FREQUENCY DRIVE SYSTEM 审中-公开
公开(公告)号：US20180287541A1
公开(公告)日：2018-10-04
申请号：US15763250
申请日：2016-02-22
申请人： Wolong Electric Group Co., Ltd.
发明人： Jianqiao WANG , Xuandong WU , Chenlong LIAN , Weican YAN
IPC分类号： H02P23/28 , H02P23/12 , H02P25/18 , H02P27/06 , H02P29/028 , H02P29/50
CPC分类号： H02P23/28 , H02P23/12 , H02P25/18 , H02P25/20 , H02P27/06 , H02P29/028 , H02P29/50
摘要： The present invention provides a high-low-voltage conversion star multi-phase variable-frequency drive system and relates to a high-voltage high-power motor and drive control thereof. The variable-frequency drive technical solution which is commonly used at present mainly has the disadvantages that a frequency converter is added to a common motor, the insulation life of the motor is short and the heat dissipating ability of the motor is poor. The system comprises a phase-shifting transformer, rectifying circuits, inverter circuits, a multi-phase motor, and a control circuit connected with the phase-shifting transformer, the rectifying circuits, the inverter circuits and the multi-phase motor, wherein primary windings of the phase-shifting transformer are connected with an alternating-current power source, and secondary windings of the phase-shifting transformer are connected with the rectifying circuits; and is characterized in that the number of the secondary windings is the same as the number of the rectifying circuits, one secondary winding is connected with one rectifying circuit, all rectifying circuits are in common-ground connection to form a common-ground direct-current power source, and output ends of the rectifying circuits are connected with the inverter circuits. By adopting the technical solution, high voltage and large currents are realized, simultaneously the structure is simple, the insulation requirement is lowered, the heat dissipating ability of the motor is improved and the power density is increased.

6. 发明申请

US20220416610A1 MOTOR AND ELECTRIC APPARATUS INCLUDING THE SAME 有权
公开(公告)号：US20220416610A1
公开(公告)日：2022-12-29
申请号：US17537043
申请日：2021-11-29
申请人： WOLONG ELECTRIC GROUP CO., LTD.
发明人： Tatsuo Maetani , Yoshinori Isomura , Feng Hu
IPC分类号： H02K5/173 , H02K1/276 , H02K7/08 , H02K11/33 , F24F1/0018
摘要： A motor includes a stator that includes a stator core around which a stator winding is wound; magnets; a rotating body; a shaft; a rotor; a first bearing; a second bearing; a first metal bracket that fixes the first bearing; and a second metal bracket that fixes the second bearing. The stator core, the first metal bracket, and the second metal bracket are electrically connected, and when a connection point between the stator core and the first metal bracket or the second metal bracket is defined as a connection point A of a bearing outer ring, a capacitive member having a capacitance Cn is located between a portion having the same potential as the connection point A and a portion having a zero reference potential of a drive circuit that applies a voltage to the stator core.

7. 发明授权

US10794399B2 Convection fan and fan blade structure thereof 有权
公开(公告)号：US10794399B2
公开(公告)日：2020-10-06
申请号：US16106994
申请日：2018-08-21
申请人： WOLONG ELECTRIC GROUP CO., LTD , WOLONG ELECTRIC (JI NAN) MOTOR CO., LTD
发明人： Cunling Wang , Xiaofei Liu , Liuxi Zhou
IPC分类号： F04D29/66 , F04D29/38 , F04D29/28 , F04D29/30 , F04D25/08
摘要： A fan blade structure of a convection fan includes a fan blade body. The fan blade body includes a central disk secured to the rotating shaft of the motor and multiple blades evenly distributed in a circumferential direction of the central disk. The fan blade body further includes an outer edge frame, the outer edge frame is connected to an outmost side of each of the blades in a radial direction of the central disk. The outer edge frame is connected to an outmost side of the blade in the radial direction of the central disk through the outer edge frame, which makes all the outmost sides of all the blades secured to the outer edge frame, thus the stability of the blade is strengthened, blade deformation in harsh environments is avoided, thereby the balance performance of the fan blade is improved, and the vibration or noise is reduced.

8. 发明申请

US20190120252A1 CONVECTION FAN AND FAN BLADE STRUCTURE THEREOF 审中-公开
公开(公告)号：US20190120252A1
公开(公告)日：2019-04-25
申请号：US16106994
申请日：2018-08-21
申请人： WOLONG ELECTRIC GROUP CO., LTD , WOLONG ELECTRIC (JI NAN) MOTOR CO., LTD
发明人： Cunling Wang , Xiaofei Liu , Liuxi Zhou
IPC分类号： F04D29/66 , F04D29/38
CPC分类号： F04D29/664 , F04D25/08 , F04D29/281 , F04D29/30 , F04D29/388 , F04D29/668 , F05D2260/96
摘要： A fan blade structure of a convection fan includes a fan blade body. The fan blade body includes a central disk secured to the rotating shaft of the motor and multiple blades evenly distributed in a circumferential direction of the central disk. The fan blade body further includes an outer edge frame, the outer edge frame is connected to an outmost side of each of the blades in a radial direction of the central disk. The outer edge frame is connected to an outmost side of the blade in the radial direction of the central disk through the outer edge frame, which makes all the outmost sides of all the blades secured to the outer edge frame, thus the stability of the blade is strengthened, blade deformation in harsh environments is avoided, thereby the balance performance of the fan blade is improved, and the vibration or noise is reduced.

9. 发明授权

US11239772B1 Systems and methods for interior permanent magnet synchronous motor control 有权
公开(公告)号：US11239772B1
公开(公告)日：2022-02-01
申请号：US17220421
申请日：2021-04-01
申请人： Wolong Electric Group Co. Ltd.
发明人： Radu Bojoi , Zheng Zhang , Ze Jiang
IPC分类号： H02P6/182 , H02P6/18 , H02P21/13 , H02P21/18 , H02K1/27 , H02P21/12 , H02P21/20 , H02P21/00 , H02P21/22
摘要： Systems and methods for robust control of a sensorless interior permanent magnet synchronous motor during severe operating conditions that causes motor parameter variation. A multi-model flux observer and a dynamic direct flux motor controller act in concert to generate driving commands. The flux observer transitions between providing flux-based rotor characteristic estimates based on different motor models. DHFI filtered currents can be utilized to obtain flux-based characteristic estimates using a motor magnetic model that are unaffected by motor parameter variations. The multi-model flux observer can be configured to transition between suitable estimation methods to reduce, minimize, or eliminate the effects of motor parameter variations.

10. 发明授权

US10819264B1 Robust starting system and method for interior permanent magnet synchronous motor control 有权
公开(公告)号：US10819264B1
公开(公告)日：2020-10-27
申请号：US16984267
申请日：2020-08-04
申请人： Wolong Electric Group Co. Ltd.
发明人： Radu Bojoi , Zheng Zhang , Ze Jiang
IPC分类号： H02P21/12 , H02P21/18 , H02P21/13 , H02P21/34 , H02P21/22
摘要： A robust starting system and method for an interior permanent magnet synchronous motor, suitable for commercial fan and blower drive applications. A comprehensive starting control process is provided that utilizes control flags to implement closed-loop control accounting for any pre-existing rotor movement, controlling the motor speed from an initial speed to a destination speed. A universal dqController provides selective configurability for collecting information regarding the initial state of the motor, as well as starting and operational motor control. Dynamic high frequency injection enables the use of HFI outside the normal standstill motor speeds by intelligently decoupling the high frequency and rotor movement portions of the stator current response.

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