Patents by Inventor Byung Chul Woo
Byung Chul Woo 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: 10256683Abstract: There is provided an electric machine, which is configured such that magnetic poles provided on a stator and a mover or rotor of the electric machine have an asymmetric shape, thus being capable of reducing a torque ripple.Type: GrantFiled: August 22, 2014Date of Patent: April 9, 2019Assignee: KOREA ELECTROTECHNOLOGY RESEARCH INSTITUTEInventors: Shi Uk Chung, Byung Chul Woo, Ji Young Lee, Yon Do Chun, Do Kwan Hong
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Patent number: 9692269Abstract: The present invention relates to a doubly salient permanent magnet electric machine that has a winding structure in which series-connected windings are included in the phase windings of a mover, and that has a stator implemented as an iron core having a plurality of permanent magnets and a plurality of stator salient poles neighboring the permanent magnets, thus reducing the number of permanent magnets by half. An electric machine is configured such that a mover moves while facing a stator and includes an N (a number of power phases) multiple number of teeth and phase windings wound around the teeth, and one or more pairs of phase windings of the mover mutually having a phase difference of 180° are connected in series, and the stator includes permanent magnets in depressions between individual stator salient poles of an iron core in which the stator salient poles are formed.Type: GrantFiled: March 31, 2011Date of Patent: June 27, 2017Assignee: KOREA ELECTROTECHNOLOGY RESEARCH INSTITUTEInventors: Shi Uk Chung, Yeon Ho Jeong, Byung Chul Woo, Ji Young Lee
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Patent number: 9246376Abstract: Disclosed herein is a linear, curved or rotary electric machine. The electric machine includes first and second movers which are adjacent to each other and have a phase angle difference of 60° therebetween. The first mover includes phases U, V and W and the second mover includes phases /U, /V and /W. The electric machine of the present invention can reduce pulsations of thrust caused by end effect. In particular, in the case where the stator includes permanent magnets having the same poles and salient poles which alternate with the permanent magnets, the number of permanent magnets used can be reduced to half of that of a conventional linear electric machine.Type: GrantFiled: October 9, 2013Date of Patent: January 26, 2016Assignee: KOREA ELECTROTECHNOLOGY RESEARCH INSTITUTEInventors: Shi Uk Chung, Do Hyun Kang, Byung Chul Woo, Ji Won Kim, Ji Young Lee, Seung Ryul Moon
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Publication number: 20150054372Abstract: There is provided an electric machine, which is configured such that magnetic poles provided on a stator and a mover or rotor of the electric machine have an asymmetric shape, thus being capable of reducing a torque ripple.Type: ApplicationFiled: August 22, 2014Publication date: February 26, 2015Inventors: Shi Uk CHUNG, Byung Chul WOO, Ji Young LEE, Yon Do CHUN, Do Kwan HONG
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Publication number: 20140035393Abstract: Disclosed herein is a linear, curved or rotary electric machine. The electric machine includes first and second movers which are adjacent to each other and have a phase angle difference of 60° therebetween. The first mover includes phases U, V and W and the second mover includes phases /U, /V and /W. The electric machine of the present invention can reduce pulsations of thrust caused by end effect. In particular, in the case where the stator includes permanent magnets having the same poles and salient poles which alternate with the permanent magnets, the number of permanent magnets used can be reduced to half of that of a conventional linear electric machine.Type: ApplicationFiled: October 9, 2013Publication date: February 6, 2014Applicant: KOREA ELECTROTECHNOLOGY RESEARCH INSTITUTEInventors: Shi Uk CHUNG, Do Hyun KANG, Byung Chul WOO, Ji Won KIM, Ji Young LEE, Seung Ryul MOON
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Patent number: 8624446Abstract: Disclosed herein is a linear, curved or rotary electric machine. The electric machine includes first and second movers which are adjacent to each other and have a phase angle difference of 60° therebetween. The first mover includes phases U, V and W and the second mover includes phases /U, /V and /W. The electric machine of the present invention can reduce pulsations of thrust caused by end effect. In particular, in the case where the stator includes permanent magnets having the same poles and salient poles which alternate with the permanent magnets, the number of permanent magnets used can be reduced to half of that of a conventional linear electric machine.Type: GrantFiled: June 9, 2010Date of Patent: January 7, 2014Assignee: Korea Electrotechnology Research InstituteInventors: Shi Uk Chung, Do Hyun Kang, Byung Chul Woo, Ji Won Kim, Ji Young Lee, Seung Ryul Moon
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Patent number: 8593019Abstract: Disclosed herein is a structure for linear and rotary electric machines. The present invention provides a modular mover structure which includes coils that have an electrical phase difference of 180°, so that the path of magnetic flux is shortened, thus reducing the size of the machine and mitigating the back-EMF unbalance. The modular mover structure can be modified into various shapes. For example, when a skew structure is applied to a mover or stator iron core, the force ripples in an electric machine can be reduced. In addition, when a hinge structure is applied to a modular mover iron core, the mover can move in a linear and curved manner. The structure of the present invention can be applied to a rotary electric machine. In this case, because the number of poles is easily increased, a low speed high torque direct drive type rotary electric machine is realized.Type: GrantFiled: April 13, 2010Date of Patent: November 26, 2013Assignee: Korea Electrotechnology Research InstituteInventors: Shi Uk Chung, Do Hyun Kang, Byung Chul Woo, Ji Won Kim, Ji Young Lee, Seung Ryul Moon
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Publication number: 20130076159Abstract: The present invention relates to a doubly salient permanent magnet electric machine that has a winding structure in which series-connected windings are included in the phase windings of a mover, and that has a stator implemented as an iron core having a plurality of permanent magnets and a plurality of stator salient poles neighboring the permanent magnets, thus reducing the number of permanent magnets by half. An electric machine is configured such that a mover moves while facing a stator and includes an N (a number of power phases) multiple number of teeth and phase windings wound around the teeth, and one or more pairs of phase windings of the mover mutually having a phase difference of 180° are connected in series, and the stator includes permanent magnets in depressions between individual stator salient poles of an iron core in which the stator salient poles are formed.Type: ApplicationFiled: March 31, 2011Publication date: March 28, 2013Applicant: KOREA ELECTROTECHNOLOGY RESEARCH INSTITUTEInventors: Shi Uk Chung, Yeon Ho Jeong, Byung Chul Woo, Ji Young Lee
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Publication number: 20100327670Abstract: Disclosed herein is a linear, curved or rotary electric machine. The electric machine includes first and second movers which are adjacent to each other and have a phase angle difference of 60° therebetween. The first mover includes phases U, V and W and the second mover includes phases /U, /V and /W. The electric machine of the present invention can reduce pulsations of thrust caused by end effect. In particular, in the case where the stator includes permanent magnets having the same poles and salient poles which alternate with the permanent magnets, the number of permanent magnets used can be reduced to half of that of a conventional linear electric machine.Type: ApplicationFiled: June 9, 2010Publication date: December 30, 2010Applicant: KOREA ELECTROTECHNOLOGY RESEARCH INSTITUTEInventors: Shi Uk CHUNG, Do Hyun KANG, Byung Chul WOO, Ji Won KIM, Ji Young LEE, Seung Ryul MOON
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Publication number: 20100259112Abstract: Disclosed herein is a structure for linear and rotary electric machines. The present invention provides a modular mover structure which includes coils that have an electrical phase difference of 180°, so that the path of magnetic flux is shortened, thus reducing the size of the machine and mitigating the back-EMF unbalance. Furthermore, the modular mover structure can be modified into various shapes. For example, when a skew structure is applied to a mover or stator iron core, the force ripples in an electric machine can be reduced. In addition, when a hinge structure is applied to a modular mover iron core, the mover can move in a linear and curved manner. Moreover, the structure of the present invention can be applied to a rotary electric machine. In this case, because the number of poles can be easily increased, a low speed high torque direct drive type rotary electric machine can be realized.Type: ApplicationFiled: April 13, 2010Publication date: October 14, 2010Applicant: KOREA ELECTROTECHNOLOGY RESEARCH INSTITUTEInventors: Shi Uk CHUNG, Do Hyun KANG, Byung Chul WOO, Ji Won KIM, Ji Young LEE, Seung Ryul MOON
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Patent number: 7604860Abstract: Provided are the high tensile nonmagnetic stainless steel wire for an low loss overhead electric conductor, the low loss overhead electric conductor using the high tensile nonmagnetic stainless steel wire as its core, and a manufacturing method of them respectively. The high tensile nonmagnetic stainless steel wire reduces a core loss and eddy current loss and minimizes effective electric resistance of the conductor by using the nonmagnetic stainless steel wire, that is a non-magnetic material, rather than a high carbon steel wire, that is a strong magnetic material. In addition, an overall power transmission loss is minimized by strengthening the tensile strength of and reducing a sectional area of the steel wire, making an aluminium-welded layer thicker, and increasing the sectional area of an aluminium conductor.Type: GrantFiled: May 25, 2004Date of Patent: October 20, 2009Assignees: Korea Sangsa Co., Ltd., Korea Electro Technology Research InstituteInventors: Byung Geol Kim, Shang Shu Kim, Byung Chul Woo, Hee Woong Lee, Ju Hwan Park, Yong Keun Jeong, Min Bum Lee, Sun Hwan Ahn
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Publication number: 20060087180Abstract: Disclosed herein is a bi-directional operating compressor using a transverse flux linear motor, the compressor comprising: a pair of stators including a plurality of U-shape upper stator iron cores and a plurality of U-shape lower stator iron cores, and a pair of neighboring circular winding coils; a rotor placed between the pair of stators including a plurality of permanent magnets connected to iron cores, a rotor center installed between a pair of structures facing each other, a pair of supports connected to both sides of the center, and a pair of pistons connected to one side of the support respectively; and a pair of cylinders provided facing the pistons at both side ends of the rotor, for compressing air in response to the reciprocating motion of the pistons.Type: ApplicationFiled: July 1, 2005Publication date: April 27, 2006Inventors: Byung-Chul Woo, Do-Hyun Kang, Jeong-Hwan Jang, Ji-Won Kim