Patents by Inventor Cheng Shun Du
Cheng Shun Du 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: 10508931Abstract: The invention relates to a motor and a resolver thereof. The resolver includes a resolver stator (70), a resolver rotor (80). The resolver includes (70) a plurality of resolver stator teeth (73) and resolver stator windings (75) wound around the resolver stator teeth (73). The resolver rotor (75) includes a resolver rotor core (81) received in a space surrounded by the resolver stator teeth (73) and capable of rotating around a shaft axis. The resolver stator windings (75) includes first output windings wound around each of the resolver stator teeth (73) by a first number of turns, second output windings wound around each of the resolver stator teeth by a second number of turns, and exciting windings wound around each resolver stator teeth by a third number of turns.Type: GrantFiled: February 3, 2017Date of Patent: December 17, 2019Assignee: JOHNSON ELECTRIC INTERNATIONAL AGInventors: Rui Feng Qin, Cheng Shun Du, Ning Sun, Xing Liu
-
Patent number: 9905983Abstract: A brush for an electric motor has a brush body having a front end surface configured to make sliding electrical contact with a commutator of the motor. First and second side surfaces are connected to the front end surface. The first side surface and the second side surface are positioned on opposite sides of the brush body in a rotational direction of the commutator. The front end surface has a first contact surface and a second contact surface that contact the commutator earlier than other regions of the front end surface, and are respectively positioned on diametrically opposed corners of the front end surface. In an initial state, the width of the contact area between the brush and the commutator is increased to extend the commutation time.Type: GrantFiled: December 21, 2015Date of Patent: February 27, 2018Assignee: Johnson Electric S.A.Inventors: Fa Yun Qi, Shu Dan Zhao, Cheng Shun Du, Rui Feng Qin
-
Publication number: 20170219385Abstract: The invention relates to a motor and a resolver thereof. The resolver includes a resolver stator (70), a resolver rotor (80). The resolver includes (70) a plurality of resolver stator teeth (73) and resolver stator windings (75) wound around the resolver stator teeth (73). The resolver rotor (75) includes a resolver rotor core (81) received in a space surrounded by the resolver stator teeth (73) and capable of rotating around a shaft axis. The resolver stator windings (75) includes first output windings wound around each of the resolver stator teeth (73) by a first number of turns, second output windings wound around each of the resolver stator teeth by a second number of turns, and exciting windings wound around each resolver stator teeth by a third number of turns.Type: ApplicationFiled: February 3, 2017Publication date: August 3, 2017Inventors: Rui Feng QIN, Cheng Shun DU, Ning SUN, Xing LIU
-
Publication number: 20160190757Abstract: A brush for an electric motor has a brush body having a front end surface configured to make sliding electrical contact with a commutator of the motor. First and second side surfaces are connected to the front end surface. The first side surface and the second side surface are positioned on opposite sides of the brush body in a rotational direction of the commutator. The front end surface has a first contact surface and a second contact surface that contact the commutator earlier than other regions of the front end surface, and are respectively positioned on diametrically opposed corners of the front end surface. In an initial state, the width of the contact area between the brush and the commutator is increased to extend the commutation time.Type: ApplicationFiled: December 21, 2015Publication date: June 30, 2016Inventors: Fa Yun QI, Shu Dan ZHAO, Cheng Shun DU, Rui Feng QIN
-
Patent number: 8288907Abstract: An electric motor has a housing, a rotor rotatably installed in the housing, n permanent magnets with the same polarity fixed at an inner surface of the housing. The rotor is a wound armature having a plurality of teeth extending in a radial direction. The housing includes n inner projecting parts, the permanent magnets and the inner projecting parts being alternately arranged in a circumferential direction about the rotor. The magnets generate 2n magnetic circuits via the housing and the rotor, n being an integer greater than one. The size of at least a portion of a first air gap formed between the permanent magnets and the rotor is greater than the size of at least a portion of a second air gap formed between the inner projecting parts and the rotor.Type: GrantFiled: July 17, 2009Date of Patent: October 16, 2012Assignee: Johnson Electric S.A.Inventors: Rui Feng Qin, James Ching Sik Lau, Yong Bin Li, Cheng Shun Du, Yuan Jiang
-
Patent number: 8283828Abstract: An electric motor comprises a stator and a rotor received in the stator. The stator comprises a shell. The shape of a cross section of the shell perpendicular to the rotor axis is a polygon. The shell comprises a plurality of side walls and arcuate connection portions connecting neighboring side walls. The stator comprises 2n magnets disposed in the arcuate connection portions. The magnets form 2m magnetic poles, where m, n are unequal positive integers. Optionally, m is equal to half or twice n. The permanent magnets of the motor are located in the inner angle of polygon shell. Thus the diameter of rotor can be the greater, and the power density of motor can be increased in the same volume.Type: GrantFiled: September 8, 2009Date of Patent: October 9, 2012Assignee: Johnson Electric S.A.Inventors: Rui Feng Qin, Cheng Shun Du
-
Patent number: 8274189Abstract: A window lift has a motor and a gearbox. The motor is a permanent magnet motor, comprising a stator and a rotor rotatably mounted to the stator. The stator or the rotor comprises a housing and magnets fixed to inner surface of the housing. The radial cross section of the housing comprises n side portions and n connecting portions, where n is an integer greater than 2. Adjacent side portions are connected together by one corresponding connecting portion and the magnets are fixed at portions corresponding to the connecting portions. The radial cross section of each side portion is like a convex curve line, which is curved outwardly relative to a straight line passing through the two ends of the convex curve line.Type: GrantFiled: March 9, 2010Date of Patent: September 25, 2012Assignee: Johnson Electric S.A.Inventors: Rui Feng Qin, Ji Yu Liang, Di Wang, Yuan Jiang, Cheng Shun Du
-
Publication number: 20100231072Abstract: A window lift has a motor and a gearbox. The motor is a permanent magnet motor, comprising a stator and a rotor rotatably mounted to the stator. The stator or the rotor comprises a housing and magnets fixed to inner surface of the housing. The radial cross section of the housing comprises n side portions and n connecting portions, where n is an integer greater than 2. Adjacent side portions are connected together by one corresponding connecting portion and the magnets are fixed at portions corresponding to the connecting portions. The radial cross section of each side portion is like a convex curve line, which is curved outwardly relative to a straight line passing through the two ends of the convex curve line.Type: ApplicationFiled: March 9, 2010Publication date: September 16, 2010Inventors: Rui Feng QIN, Ji Yu Liang, Di Wang, Yuan Jiang, Cheng Shun Du
-
Publication number: 20100060096Abstract: An electric motor comprises a stator and a rotor received in the stator. The stator comprises a shell. The shape of a cross section of the shell perpendicular to the rotor axis is a polygon. The shell comprises a plurality of side walls and arcuate connection portions connecting neighboring side walls. The stator comprises 2n magnets disposed in the arcuate connection portions. The magnets form 2m magnetic poles, where m, n are unequal positive integers. Optionally, m is equal to half or twice n. The permanent magnets of the motor are located in the inner angle of polygon shell. Thus the diameter of rotor can be the greater, and the power density of motor can be increased in the same volume.Type: ApplicationFiled: September 8, 2009Publication date: March 11, 2010Inventors: Rui Feng QIN, Cheng Shun Du
-
Publication number: 20100013337Abstract: An electric motor has a housing, a rotor rotatably installed in the housing, n permanent magnets with the same polarity fixed at an inner surface of the housing. The rotor is a wound armature having a plurality of teeth extending in a radial direction. The housing includes n inner projecting parts, the permanent magnets and the inner projecting parts being alternately arranged in a circumferential direction about the rotor. The magnets generate 2n magnetic circuits via the housing and the rotor, n being an integer greater than one. The size of at least a portion of a first air gap formed between the permanent magnets and the rotor is greater than the size of at least a portion of a second air gap formed between the inner projecting parts and the rotor.Type: ApplicationFiled: July 17, 2009Publication date: January 21, 2010Inventors: Rui Feng QIN, James Ching Sik Lau, Yong Bin Li, Cheng Shun Du, Yuan Jiang
-
Patent number: D782979Type: GrantFiled: June 3, 2016Date of Patent: April 4, 2017Assignee: Johnson Electric S.A.Inventors: Fa Yun Qi, Shu Dan Zhao, Cheng Shun Du, Rui Feng Qin
-
Patent number: D783531Type: GrantFiled: June 3, 2016Date of Patent: April 11, 2017Assignee: Johnson Electric S.A.Inventors: Fa Yun Qi, Shu Dan Zhao, Cheng Shun Du, Rui Feng Qin
-
Patent number: D783532Type: GrantFiled: June 3, 2016Date of Patent: April 11, 2017Assignee: Johnson Electric S.A.Inventors: Fa Yun Qi, Shu Dan Zhao, Cheng Shun Du, Rui Feng Qin
-
Patent number: D784927Type: GrantFiled: June 3, 2016Date of Patent: April 25, 2017Assignee: Johnson Electric S.A.Inventors: Fa Yun Qi, Shu Dan Zhao, Cheng Shun Du, Rui Feng Qin
-
Patent number: D790469Type: GrantFiled: June 3, 2016Date of Patent: June 27, 2017Assignee: JOHNSON ELECTRIC S.A.Inventors: Fa Yun Qi, Shu Dan Zhao, Cheng Shun Du, Rui Feng Qin