Seong Taek Lee

US Patent:

20130169094, Jul 4, 2013

Filed:

Jul 26, 2012

Appl. No.:

13/559330

Inventors:

Seong T. Lee - Lexington KY, US
Fang Deng - Novi MI, US

Assignee:

Danotek Motion Technologies, Inc. - Canton MI

International Classification:

H02K 1/27

US Classification:

31015601

Abstract:

A rotor structure is provided to block direct axis flux from a stator armature without reducing the main magnetizing flux from permanent magnet inside the rotor. For example, a rotor may be provided including a magnet and a non-magnetic region located radially between the magnet and an edge of the rotor.

US Patent:

20130169097, Jul 4, 2013

Filed:

Jul 23, 2012

Appl. No.:

13/555943

Inventors:

Daniel M. Saban - Northville MI, US
Fang Deng - Novi MI, US
Seong T. Lee - Lexington KY, US

Assignee:

Danotek Motion Technologies, Inc. - Canton MI

International Classification:

H02K 21/02
H02K 21/14
H02K 21/22
H02K 21/12

US Classification:

31015608, 310152

Abstract:

An electric machine includes a plurality of teeth separated by a plurality of slots positioned on an armature of the electric machine. Each of the teeth may include at least one bifurcation. A plurality of magnets may be arranged on a main field of the electric machine to form an axial array group. The magnets in the axial array group may be arranged in the main field with respect to each other to create a multi-stepped arrangement having a predetermined step angle. The step angle is determined based on the positioning of the bifurcations and the slots.

US Patent:

20200389076, Dec 10, 2020

Filed:

Jun 7, 2019

Appl. No.:

16/434600

Inventors:

- Auburn Hills MI, US
SEONG TAEK LEE - LEXINGTON KY, US

International Classification:

H02K 15/085

Abstract:

A method of inserting a winding into a stator having skewed slots formed on an inside diameter of a stator lamination includes forming a conductor having a plurality of slot segments, loading the conductor into a plurality of skewed slot elements of a linear cartridge having a first end, a second end, and a linear axis connecting the first end and the second end, the plurality of skewed slot elements being angled relative to the linear axis, transferring the conductor from the linear cartridge to a plurality of skewed slot members formed in an outside diameter of a rotary cartridge, inserting the rotary cartridge into the inside diameter of the stator lamination, and shifting the conductor from the rotary cartridge into the skewed slots of the stator.

US Patent:

20200220400, Jul 9, 2020

Filed:

Jan 8, 2019

Appl. No.:

16/242340

Inventors:

- Auburn Hills MI, US
Seong Taek Lee - Noblesville IN, US

International Classification:

H02K 1/27

Abstract:

An electric machine with a rotor having internal permanent magnets. Each rotor pole includes at least one central magnet slot with a permanent magnet disposed therein and first and second outer magnet slots each with a permanent magnet disposed therein. The rotor poles each define a radial centerline. The first and second outer magnet slots are positioned on opposite circumferential sides of the radial centerline and are at least partially positioned radially outwardly of a radially outermost edge of the at least one central magnet slot. The first and second outer magnet slots each define a tapered material bridge disposed between the outer magnet slot and a radially outer perimeter of the rotor core. Each of the tapered material bridges defines a variable radial thickness with the variable radial thickness increasing as the circumferential distance from the radial centerline of the pole increases.

US Patent:

20200220401, Jul 9, 2020

Filed:

Jan 8, 2019

Appl. No.:

16/242515

Inventors:

- Auburn Hills MI, US
Seong Taek Lee - Noblesville IN, US

International Classification:

H02K 1/27

Abstract:

An electric machine having a rotor with a rotor core formed out of magnetically permeable material and defines a plurality of poles. Each pole includes a plurality of discrete axially extending magnet slots with at least one permanent magnet in each magnet slot. Each pole has a radial centerline and includes a plurality of voids defined by the rotor core. For each pole the magnet slots include at least one central magnet slot and two outer magnet slots, the outer magnet slot are positioned on opposite circumferential sides of the radial centerline of the pole and are at least partially positioned radially outwardly of a radially outermost edge of the at least one central magnet slot. Each of the plurality of voids is spaced from each of the magnet slots and positioned circumferentially between the outer magnet slots and radially outwardly of the at least one central magnet slot.

US Patent:

20190149001, May 16, 2019

Filed:

Nov 14, 2017

Appl. No.:

15/812282

Inventors:

- Auburn Hills MI, US
Seong Taek Lee - Noblesville IN, US

International Classification:

H02K 3/12
H02K 3/28

Abstract:

An electric machine including a rotor operably coupled with a stator having a plurality of stator windings. Each stator winding defines has a plurality of axially extending segments disposed within the stator slots and a plurality of end turn segments. At least one first axially extending segment defining a first cross sectional area and at least two second axially extending segments defining a smaller second cross sectional area are disposed in each of the stator slots. At least one of the plurality of end turn segments conductively couples a single first axially extending segment in a first one of the plurality of slots to at least two second axially extending segments in a second one of the plurality of slots. In some embodiments, the larger first axially extending segments are all disposed radially outwardly of the smaller second axially extending segments. The windings may be formed using hairpin conductors.

US Patent:

20180358851, Dec 13, 2018

Filed:

Jun 12, 2017

Appl. No.:

15/620003

Inventors:

- Auburn Hills MI, US
Seong Taek Lee - Lexington KY, US

International Classification:

H02K 1/26
H02K 1/27
H02K 1/02

Abstract:

An electric machine including a stator and rotor. The rotor has a core wherein each pole includes first and second axially extending magnet slots positioned in an outwardly opening V-shape. Permanent magnets are positioned in the magnet slots. The magnet slots define first and second opposing major edges wherein the first major edge is disposed nearer the outer radial perimeter of the rotor core. First and second opposing minor edges extend between the major edges and the first minor edge is disposed nearer the outer radial perimeter. The first and second slots are reflectively symmetrical with one symmetrical aberration. The symmetrical aberration being formed by an axially extending non-symmetric gap defined by the first major edge of the second magnet slot proximate the first minor edge. Demagnetization may be reduced by operating the machine with the second magnet slot trailing the first magnet slot during rotation of the rotor.

US Patent:

20180034335, Feb 1, 2018

Filed:

Jul 18, 2017

Appl. No.:

15/652507

Inventors:

- Auburn Hills MI, US
Seong Taek Lee - Noblesville IN, US

International Classification:

H02K 3/28
H02K 3/12

Abstract:

A multi-phase electric machine having plurality of windings are mounted on the stator core that define a plurality of phases wherein, for each phase, the windings include at least two parallel windings, each winding comprising a pair of continuous wires which are connected in series. For each pole, the parallel windings fill one or more central slots and two outer slots. Each winding fills each central slot twice the number of times that the winding fills each outer slot to thereby define a slot fill ratio of 2:1 between central slots and outer slots and wherein each wire of the wire pair forming a winding fills the slots in a ratio that differs from the slot fill ratio. Each of the parallel windings include a phase shift end loop that shift the windings from one outer slot to the other outer slot.