Patents by Inventor Mao Xiong Jiang
Mao Xiong Jiang 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).
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Patent number: 9343934Abstract: An electric motor has a wound stator and a permanent magnet rotor. The rotor includes a shaft, a hub fixed on the shaft, a plurality of rotor core segments and magnets fixed around the hub. The rotor core segment includes at least two rotor blocks inwardly extending from the innermost portion thereof. The hub includes a plurality of hub blocks equidistantly and outwardly extending from the outer surface thereof. The rotor blocks of each rotor core segment engage with at least one hub block to fix the rotor core segment to the hub. The number of rotor blocks is greater than the number of hub blocks.Type: GrantFiled: August 21, 2012Date of Patent: May 17, 2016Assignee: Johnson Electric S.A.Inventors: Jian Zhao, Yue Li, Mao Xiong Jiang, Chui You Zhou, Yong Wang, Ya Ming Zhang
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Patent number: 9263930Abstract: An electric machine has a stator and a rotor. The stator has a housing and at least one pair of magnetic poles. Each magnetic pole has a primary magnet and two auxiliary magnets disposed on respective sides of the primary magnet. All of the magnets are disposed on an inner surface of the housing. All the magnets of a magnetic pole have the same polarity.Type: GrantFiled: March 22, 2011Date of Patent: February 16, 2016Assignee: JOHNSON ELECTRIC S.A.Inventors: Mao Xiong Jiang, Yue Li, Jian Zhao, Yong Li, Yu Hong Guo
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Patent number: 9225209Abstract: A permanent magnet rotor includes a shaft, a rotor core fixed to the shaft, and multiple magnet sets. The rotor core has multiple groove sets for receiving the magnet sets. Each groove set has two grooves spaced apart by a first section of the rotor core. The first section has a width gradually decreasing from a radially inner end to a radially outer end. Each groove has a width gradually increasing from a radially inner end to a radially outer end. Each magnet set includes two magnets respectively received in the grooves of a respective groove set. The magnets of a magnet set are magnetized in a same direction, and every two adjacent magnet sets are magnetized in contrary directions creating multiple magnetic poles. The number of magnetic poles is equal to the number of magnet sets.Type: GrantFiled: December 12, 2012Date of Patent: December 29, 2015Assignee: JOHNSON ELECTRIC S.A.Inventors: Yue Li, Mao Xiong Jiang, Jian Zhao, Shi Xing Huang, Ya Ming Zhang, Xiao Ning Zhu
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Publication number: 20150349595Abstract: A permanent magnet motor has a number of permanent magnets forming permanent magnet poles. Each magnet has an outer surface that is an arc surface with a convex middle. An inner surface of the magnet is a curved surface with a concave middle. The curved surface has an arc surface section and two planar surface sections. The arc surface has a pole arc angle ? of 0.7 to 0.96, and the ratio of an arc angle ? of the arc surface section to the pole arc angle ? is 0.15 to 0.35. The shape of the inner surface of the magnet creates uneven air gaps between the rotor poles and the stator core poles. This reduces cogging torque, increases the motor efficiency, and reduces the motor noise.Type: ApplicationFiled: May 29, 2015Publication date: December 3, 2015Inventors: Mao Xiong JIANG, Jian ZHAO, Guo Wei SUN, Yong LI, Yong WANG, Hong Jiang ZHAO, Yue LI
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Publication number: 20150349593Abstract: An electric motor has a wound stator and an outer rotor. A core of the stator has outer and inner annular portions. Tooth portions extend radially outwardly from the outer annular portion. Connecting arms interconnect the outer and inner annular portions. The width of the connecting arms is less than the width of the tooth portions. The ratio of tooth height L1 to distance between the roots of adjacent teeth L3 is in the range of 1.0 and 1.3. The ratio of tooth width T3 to L3 is in the range of 0.8 and 1.0. The ratio of tooth length T1 to L3 is in the range of 0.5 and 0.6. The ratio of T3 to outer diameter of the stator core D is in the range of 0.07 and 0.1.Type: ApplicationFiled: May 29, 2015Publication date: December 3, 2015Inventors: Mao Xiong JIANG, Jian ZHAO, Guo Wei SUN, Yong LI, Yong WANG, Hong Jiang ZHAO, Yue LI
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Patent number: 9140265Abstract: A blower includes an air pump and a motor. The pump includes an impeller and a casing housing the impeller. The casing includes a casing inlet through which air is drawn in and a casing outlet through which the air is expelled by the impeller. The motor is arranged at the casing outlet and includes a stator and a rotor. The stator includes a stator core and a plurality of coils. The stator core includes a substantially ring-shaped yoke and a plurality of teeth extending inwards from the yoke. Each coil is wound around the yoke and is partially sandwiched between two adjacent teeth. The impeller is driven by the rotor.Type: GrantFiled: March 16, 2012Date of Patent: September 22, 2015Assignee: JOHNSON ELECTRIC S.A.Inventors: Yue Ll, Mao Xiong Jiang, Jian Zhao, Zhi Jun Wang, Ke Yan, Yong Wang
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Patent number: 9124152Abstract: A permanent magnet motor has a rotor and a stator. The rotor has a shaft, a rotor core and commutator fixed to the shaft, and rotor windings wound about poles of the rotor core and electrically connected to the commutator. The stator has an axially extending round housing, a ring magnet member fixed to an inner surface of the round housing, an endcap, and at least one pair of brushes in sliding contact with the commutator. A chamber is formed by the housing and the endcap. The commutator is disposed in the chamber. A window lift device incorporating the motor is also provided.Type: GrantFiled: February 17, 2012Date of Patent: September 1, 2015Assignee: Johnson Electric S.A.Inventors: Mao Xiong Jiang, Yue Li, Jian Zhao, Hong Min Wei, Ke Lin Zhou, Xing Zhang
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Patent number: 9083226Abstract: A brushless motor has a stator and a rotor. The stator has a stator core and stator windings. The stator core has a stator yoke and teeth extending radially inwardly from the stator yoke. The stator windings are formed by concentrated coils wound on the teeth. The rotor has a rotor shaft, a rotor core fixed to the rotor shaft and magnets fixed in slots formed in the rotor core. Each magnet is plate shaped and extends in both axial and radial directions of the rotor and each magnet is magnetically charged across its thickness so that a rotor pole is formed between two adjacent magnets. The ratio of the radial thickness (Y) of the stator yoke to the width (T) of the tooth body is from 0.4 to 0.7.Type: GrantFiled: August 10, 2011Date of Patent: July 14, 2015Assignee: JOHNSON ELECTRIC S.A.Inventors: Yue Li, Jian Zhao, Yong Wang, Ya Ming Zhang, Yan Hong Xue, Mao Xiong Jiang
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Patent number: 9065232Abstract: A commutator includes a substantially tubular insulating core, a first slip ring fixed to the core, a plurality of first bars electrically connected to the first slip ring, a second slip ring fixed to the core, and a plurality of second bars electrically connected to the second slip ring. The first bars and the second bars are fixed to the outer surface of the core and are alternately arranged at equally spaced intervals in the circumferential direction of the core. The first slip ring and the second slip ring are arranged on the same side of the first bars and the second bars. The first and second slip rings respectively comprise a contact surface that is substantially perpendicular to the axis of the commutator and is configured for contacting brushes.Type: GrantFiled: July 2, 2012Date of Patent: June 23, 2015Assignee: JOHNSON ELECTRIC S.A.Inventors: Yue Li, Mao Xiong Jiang, Yong Wang, Hai Hui Xiang, Ya Ming Zhang, Jian Zhao
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Patent number: 8987966Abstract: An electric motor has a wound stator and a permanent magnet rotor. The rotor includes a shaft, a hub fixed on the shaft, a plurality of rotor core segments and magnets fixed around the hub, and a pair of covers fixed to axial ends of the rotor core segments. The hub and covers are formed on the rotor core segments by inserting molding and one of the covers has openings to allow the magnets to be inserted into spaces formed between adjacent rotor core segments such that the rotor core segments and magnets are alternately arranged in a circumferential direction of the rotor.Type: GrantFiled: January 18, 2012Date of Patent: March 24, 2015Assignee: Johnson Electric S.A.Inventors: Jian Zhao, Yue Li, Mao Xiong Jiang, Ya Ming Zhang, Xiao Ning Zhu
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Patent number: 8933605Abstract: A brushless motor has a stator and a rotor rotatably installed inside of the stator. The stator includes a stator core with teeth protruding inwardly and windings wound on the teeth. The rotor includes a shaft, a rotor core fixed on the shaft, and a ring magnet fixed to the circumferential outer surface of the rotor core. The magnet includes a plurality of magnetic poles radially magnetized so that north poles and south poles are arranged alternately in the circumferential direction. Boundary lines between magnetic poles are skewed by an angle relative to an axis of the shaft.Type: GrantFiled: August 19, 2011Date of Patent: January 13, 2015Assignee: Johnson Electric S.A.Inventors: Mao Xiong Jiang, Yue Li, Tao Zhang, San Ruan Xiao, Lik Hon Chan
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Publication number: 20140363314Abstract: A brushless motor includes a stator comprising a stator core with teeth protruding inwardly and windings wound on the teeth, and a rotor comprising a shaft, a rotor core fixed to the shaft, and a ring magnet fixed to the circumferential outer surface of the rotor core. The ring magnet includes a plurality of magnetic poles radially magnetized so that north poles and south poles are arranged alternately in the circumferential direction, boundary lines between adjacent magnetic poles being skewed by an angle ? relative to an axis of the shaft. A plurality of grooves are formed in a circumferential outer surface of the rotor core. Each groove extends from one axial end to the other axial end of the rotor core, has a circumferential width smaller than each of the magnetic poles, and is covered by the ring magnet with a void formed between the groove and the ring magnet.Type: ApplicationFiled: August 22, 2014Publication date: December 11, 2014Inventors: Mao Xiong JIANG, Yue LI, Tao ZHANG, San Yuan XIAO, Lik Hon CHAN
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Patent number: 8890389Abstract: An electric motor includes an inner stator including inner magnetic poles arranged circumferentially, an outer stator including outer magnets arranged circumferentially, and a rotor rotatably disposed between the inner and outer stators. The rotor includes a shaft, a rotor core fixed to the shaft and a winding wound on the rotor core. The rotor core includes a ring shaped yoke having a plurality of inner teeth extending inwardly and a plurality of outer teeth extending outwardly. The winding includes a plurality coils each including an inner side received in a corresponding inner slot formed between adjacent inner teeth and an outer side received in a corresponding outer slot formed between adjacent outer teeth.Type: GrantFiled: May 25, 2012Date of Patent: November 18, 2014Assignee: Johnson Electric S.A.Inventors: Yue Li, Mao Xiong Jiang, Jian Zhao, Zhi Jun Wang, Ya Ming Zhang, Hai Hui Xiang
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Patent number: 8866359Abstract: A brushless motor has a stator and a rotor. The stator has a stator core with a plurality of inwardly extending salient poles and windings wound about the salient poles. The rotor has a shaft, a rotor core fixed onto the shaft, and magnets inserted in the rotor core for forming magnetic poles of the rotor. Each of the salient poles has a pole shoe with a pole face that extends along a circumferential direction confronting the rotor core and being spaced from the rotor core by an air gap. In a radial cross section of the motor, each of the magnetic poles of the rotor has an effective dimension (W) which is about 0.85 times to 1.2 times of the chord length (L) of each pole face.Type: GrantFiled: May 31, 2011Date of Patent: October 21, 2014Assignee: Johnson Electric S.A.Inventors: Yue Li, Jian Zhao, Yong Wang, Ya Ming Zhang, Yan Hong Xue, Mao Xiong Jiang
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Patent number: 8796896Abstract: An electric motor, especially a brushless PMDC motor, has a stator and a rotor rotatably installed inside of the stator. The stator has a housing with an open end, an end cap fixed to the open end of the housing, a stator core fixed to an inner surface of the housing, and windings wound on the stator core. The rotor includes a plurality of permanent magnetic poles. The housing has a flange bent inwardly from the open end of the housing and abutting against the end cap inwardly and axially to thereby fix the end cap to the housing. The length of the flange measured along the circumferential direction of the housing is greater than half of that of the housing.Type: GrantFiled: October 21, 2011Date of Patent: August 5, 2014Assignee: Johnson Electric S.A.Inventors: James Ching Sik Lau, Mao Xiong Jiang, Gang Li, Ke Lin Zhou, Hong Min Wei, Jie Chai, Tao Zhang
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Patent number: 8686606Abstract: A cooling device includes an inner sleeve with an outer surface, an outer sleeve surrounding the inner sleeve, and two end portions extending between the inner sleeve and the outer sleeve at the ends. The inner sleeve, the outer sleeve and the end portions define a peripheral space. A flow guiding structure defines N channels in the peripheral space for coolant to flow, where N is an integer equal to or greater than 1. Each channel has at least two branches, and N pairs of inlet and outlet corresponding to the N channels. The branches of each channel are in fluid communication with a respective pair of inlet and outlet. Each branch extends over a half circumferential part of the outer surface of the inner sleeve. An electric motor incorporating the cooling device is also provided.Type: GrantFiled: February 24, 2012Date of Patent: April 1, 2014Assignee: Johnson Electric S.A.Inventors: Mao Xiong Jiang, Yue Li, Gang Li, Yong Wang, Hai Hui Xiang
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Patent number: 8643963Abstract: A permanent magnet electric motor includes a rotor and a stator magnetically coupled to the rotor. The rotor includes a shaft, a rotor core fixed to the shaft and having n teeth, n being an integer, a commutator fixed to the shaft adjacent the rotor core and having m segments, m being an even number less than n. Rotor windings are wound about the teeth and connected to the segments. The stator includes a plurality of permanent magnets surrounding the rotor core and brushes in sliding electrical contact with the commutator.Type: GrantFiled: September 16, 2011Date of Patent: February 4, 2014Assignee: Johnson Electric S.A.Inventors: Yue Li, Mao Xiong Jiang, Jian Zhao, Yong Li, Hai Jun Hua
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Patent number: 8633791Abstract: A rotary solenoid (1) includes a stator (10), a rotor (40), and a torsion spring (50) connected between the stator (10) and the rotor (40). The stator (10) includes an armature (13) having three stator poles (14, 15) cooperatively defining a substantially cylindrical space (18) and a coil (19) wound about one of the stator poles (14). The rotor (40) includes a shaft (42) rotatably assembled to the stator (10) and a rotor core (44) fixed to the shaft (42) and received in the cylindrical space (18). The rotor core (44) has three rotor poles (43) corresponding to the stator poles (14, 15). The rotor (40) stays at a first position under the force of the torsion spring (50) and rotates to a second position under the force of the torsion spring (50) and the magnetic force of stator (10) when the coil (19) is powered.Type: GrantFiled: June 20, 2013Date of Patent: January 21, 2014Assignee: Johnson Electric S.A.Inventors: Yue Li, Mao Xiong Jiang, Chui You Zhou, Jin Yun Gan, Xiao Mei Yuan, Ying Chen
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Publication number: 20130342296Abstract: A rotary solenoid (1) includes a stator (10), a rotor (40), and a torsion spring (50) connected between the stator (10) and the rotor (40). The stator (10) includes an armature (13) having three stator poles (14, 15) cooperatively defining a substantially cylindrical space (18) and a coil (19) wound about one of the stator poles (14). The rotor (40) includes a shaft (42) rotatably assembled to the stator (10) and a rotor core (44) fixed to the shaft (42) and received in the cylindrical space (18). The rotor core (44) has three rotor poles (43) corresponding to the stator poles (14, 15). The rotor (40) stays at a first position under the force of the torsion spring (50) and rotates to a second position under the force of the torsion spring (50) and the magnetic force of stator (10) when the coil (19) is powered.Type: ApplicationFiled: June 20, 2013Publication date: December 26, 2013Inventors: Yue LI, Mao Xiong JIANG, Chui You ZHOU, Jin Yun GAN, Xiao Mei YUAN, Ying CHEN
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Patent number: 8575811Abstract: A motor has a stator and a rotor. The stator has 2P poles wherein P is an integer greater than one. The rotor has a shaft, a rotor core and a commutator fixed to the shaft. The commutator has m segments where m is an even integer greater than P. Every two adjacent segments are electrically connected by a winding unit so that the rotor winding comprises m winding units with at least one of the winding units comprising P coils connected in series; and each coil of each winding unit is directly connected to a corresponding two segments.Type: GrantFiled: July 20, 2010Date of Patent: November 5, 2013Assignee: Johnson Electric S.A.Inventors: Yue Li, Bao Ting Liu, Ji Cheng Pan, Mao Xiong Jiang, Yong Qiang Song, Ji Dong Chai