WO2004047283A2 - Bldc motor for washing machine - Google Patents
Bldc motor for washing machine Download PDFInfo
- Publication number
- WO2004047283A2 WO2004047283A2 PCT/KR2003/002506 KR0302506W WO2004047283A2 WO 2004047283 A2 WO2004047283 A2 WO 2004047283A2 KR 0302506 W KR0302506 W KR 0302506W WO 2004047283 A2 WO2004047283 A2 WO 2004047283A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- core teeth
- motor
- prevention member
- brushless
- vibration prevention
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/325—Windings characterised by the shape, form or construction of the insulation for windings on salient poles, such as claw-shaped poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
- H02K21/222—Flywheel magnetos
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/30—Windings characterised by the insulating material
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
Definitions
- the present invention relates to washing machines, and more particularly, to a BLDC motor (Brushless Direct Current Motor) for driving a washing machine.
- BLDC motor Batteryless Direct Current Motor
- the washing machine progresses washing, rinsing, and spinning cycles for removing dirt from laundry by using actions of detergent and water.
- the washing machines there are circulating type (pulsating type), agitating type (washing pole type), and drum type washing machines.
- a motor for driving the washing machine most of which is the BLDC motor.
- the BLDC motor provided with a stator having a coil wound thereon and a rotor around the stator, for generating a rotating power when power is provided to the stator.
- FIG. 1 illustrates a section of a related art drum type washing machine
- FIG. 2 illustrates an enlarged view of 'A' part in FIG. 1.
- FIGS. 1 and 2 there are a tub 3 inside of a cabinet for holding washing water, and a drum 9 inside of the tub 3 for introduction of laundry.
- a drum shaft 7 for transmission of a driving power from a BLDC motor 20 to the drum 9.
- bearings 11 in front, and rear parts of the drum shaft 17, and a bearing housing 15 in a center part of a rear wall of the tub 3 for supporting the bearings 11.
- FIG. 3 illustrates a perspective view showing the stator in FIG. 1 or 2 separately
- FIG. 4 illustrates a perspective view showing the rotor in FIG. 1 or 2, separately.
- the stator 30 is provided with an annular frame 31, and a plurality of core teeth 33 each extended outward from the frame 31 having a coil wound thereon.
- fastening ribs 32 each formed as a unit with the frame 31 projected toward an inside of the frame 31 having a fastening hole 32a for mounting the stator 30 on a rear wall of the tub 3.
- the rotor 40 is provided with permanent magnets 41 attached to an inside, and mounted to the rear end part of the drum shaft 17 with the fastening bolt 18. According to this, the drum 9, connected to the rotor 40 directly, is rotated as the drum 9 receives the rotating power from the rotor 40 when the BLDC motor 20 is in operation.
- the rotor 40 is rotated as a power is provided to the stator 30 to form an electric magnet which interacts with the permanent magnets 41 attached to the inside of the rotor 40, and the power transmitted to the drum shaft 17 through the rotor 40 rotates the drum 9, to carry out washing and spinning.
- the related art drum type washing machine has a problem in that the fast alternation of polarities of the core teeth 33 in driving the BLDC motor 20 causes resonance at a certain rotation speed.
- the problem is occurred at other washing machines having the BLDC motor applied thereto.
- FIG. 5 illustrates a graph showing a result of sound power level test (PWL test) of the related art BLDC motor for the washing machine. That is, referring to FIG. 5, the washing machine having the related art BLDC motor 20 applied thereto shows peak noises in a range of 76dB caused by resonance at 1360 RPM and 1550 RPM.
- PWL test sound power level test
- An object of the present invention for solving the foregoing related art problems lies on preventing peak noise caused by a resonance frequency, and reducing an overall noise of the system by binding core teeth of a stator of a BLDC motor with a vibration prevention member.
- the object of the present invention can be achieved by providing a brushless
- DC motor for a washing machine including a stator including a frame, a core in the frame, and a plurality of core teeth each extended outward from the frame and having a coil wound thereon, a rotor mounted to surround the core teeth, and rotatable when power is provided to the stator, and a vibration prevention member connected between the core teeth to bind the core teeth to each other, for prevention of vibration of the core teeth.
- the vibration prevention member binds outer ends of the core teeth.
- the vibration prevention member encloses each of outer ends of the core teeth at least once.
- the vibration prevention member binds outer ends of the core teeth in succession.
- the vibration prevention member includes one member for binding all the core teeth, continuously.
- the vibration prevention member is a lacing thread for binding the core teeth.
- the lacing thread binds outer ends of the core teeth.
- the lacing thread winds each of outer ends of the core teeth at least once.
- the lacing thread is formed of polyester, and binds the core teeth continuously, without disconnection.
- the vibration prevention member is a tape with a width for binding the core teeth.
- the vibration prevention member is formed of a non-magnetic material. Accordingly, it is preferable that the vibration prevention member is formed of plastic, such as polyester.
- FIG. 1 illustrates a section of a related art drum type washing machine
- FIG. 2 illustrates an enlarged view of 'A' part in FIG. 1
- FIG. 3 illustrates a perspective view showing the stator in FIG. 1 or 2 separately;
- FIG. 4 illustrates a perspective view showing the rotor in FIG. 1 or 2, separately;
- FIG. 5 illustrates a graph showing a result of sound power level test (PWL test) of a related art BLDC motor for the washing machine
- FIG. 6 illustrates a perspective view showing a stator in accordance with a preferred embodiment of the present invention
- FIG. 7 illustrates a perspective view showing a rotor in accordance with a preferred embodiment of the present invention.
- FIG. 8 illustrates a graph showing a result of sound power level test (PWL test) of a BLDC motor in accordance with a preferred embodiment of the present invention. Best Mode for Carrying Out the Invention
- FIG. 6 illustrates a perspective view showing a stator in accordance with a preferred embodiment of the present invention
- FIG. 7 illustrates a perspective view showing a rotor in accordance with a preferred embodiment of the present invention.
- the BLDC motor for a washing machine includes a stator 70, and a rotor 80 around the stator 70.
- the stator 70 includes a frame 700, a core 710 in the frame 700, and a plurality of core teeth 710a each extended outward from the frame 700 and having a coil wound thereon.
- the rotor 80 includes a plurality of permanent magnets 810 surrounding the core teeth 710a, and is mounted so as to be rotatable when power is provided to the stator 70.
- the BLDC motor further includes a vibration prevention member 750 for suppressing vibration of the core teeth 710a.
- the vibration prevention member 750 binds the core teeth 710a to each other, for prevention of vibration of the core teeth 710a when the BLDC motor is driven.
- the vibration prevention member 750 binds outer ends of the core teeth 710a. That is, a part in the core tooth 710 where the vibration is the most intense when the BLDC motor is driven is the outer end of the core tooth 710. Therefore, once the outer ends of the core teeth 710a are bound with the vibration prevention member 750, the vibration of the core teeth 710a can be attenuated. Of course, center parts of the core teeth 710a can be bound with the vibration prevention member 750.
- the supporting member 750 encloses the core tooth 710 at least once for firmer supporting of the core teeth 710a.
- the vibration prevention member 750 binds the core teeth 710a in succession. That is, the vibration prevention member 750 binds adjacent core teeth 710a in succession with reference to one core tooth 710a. Of course, the vibration prevention member 750 may bind the other core teeth 710a. hi the meantime, it is preferable that the vibration prevention member 750 is a unitary member that binds all the core teeth 710a, continuously.
- the vibration prevention member 750 may be a plurality of members each for binding a few core teeth 710a into one unit. In this instance, it is preferable that the units of core teeth 710a are in turn connected with a separate vibration prevention member 750.
- the vibration prevention member 750 is formed of a nonmagnetic material, otherwise the vibration prevention member 750 can be magnetized, and impede operation of the motor. Therefore, it is preferable that the vibration prevention member 750 is formed of a plastic, such as polyester.
- the vibration prevention member 750 will be described in more detail.
- the vibration prevention member 750 is a lacing thread for binding the core teeth 710a.
- the lacing thread binds outer ends of the core teeth 710a.
- the lacing thread is wound around each of the outer ends of the core teeth 710a at least once, and, particularly, it is preferable that the lacing thread binds the core teeth 710a continuously, without disconnection. It is preferable that the lacing thread is formed of a non-magnetic material, such as polyester.
- vibration prevention member 750 such as a tape with a certain width for binding the core teeth 710a.
- the operation of the BLDC motor for a washing machine of the present invention will be described.
- vibration of the core teeth 710a of the stator 70 in the BLDC motor of the present invention is suppressed. According to this, vibration of the stator 70 is also reduced, to permit to avoid peak noise caused by a system resonance.
- the BLDC motor of the present invention can suppress the vibration by means of the vibration prevention member 750 that binds, and connects the core teeth 710a of the stator 70 to each other.
- FIG. 8 illustrates a graph showing a result of sound power level test (PWL test) of a BLDC motor in accordance with a preferred embodiment of the present invention.
- the noise is dropped to a 70dB level from 76dB in the related art as a result of application of the BLDC motor of the present invention. Moreover, it can be noted that the system overall noise is also reduced when the BLDC motor of the present invention is applied.
- the related art BLDC motor shows the overall noise value in a range of
- the overall noise value is in a range of 69dB level.
- the vibration prevention member 750 on the stator 70 prevents vibration of the core teeth 710a caused by alternation of polarities in driving the motor. Moreover, the peak noise coming from the system resonance caused by vibration of the core teeth 710a is suppressed, and the overall noise is also reduced. At the end, the BLDC motor reduces an overall noise of the washing machine, and enhances product reliability.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03774265A EP1570563B1 (en) | 2002-11-20 | 2003-11-20 | Bldc motor for washing machine |
AU2003282410A AU2003282410B2 (en) | 2002-11-20 | 2003-11-20 | BLDC motor for washing machine |
DE60331675T DE60331675D1 (en) | 2002-11-20 | 2003-11-20 | BLDC MOTOR FOR A WASHING MACHINE |
US10/484,508 US7042120B2 (en) | 2002-11-20 | 2003-11-20 | BLDC motor for washing machine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2002-0072440 | 2002-11-20 | ||
KR10-2002-0072440A KR100499484B1 (en) | 2002-11-20 | 2002-11-20 | structure for preventing noise of BLDC motor in full automation-type washing machine |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2004047283A2 true WO2004047283A2 (en) | 2004-06-03 |
WO2004047283A3 WO2004047283A3 (en) | 2004-09-16 |
Family
ID=32322264
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2003/002506 WO2004047283A2 (en) | 2002-11-20 | 2003-11-20 | Bldc motor for washing machine |
Country Status (7)
Country | Link |
---|---|
US (1) | US7042120B2 (en) |
EP (1) | EP1570563B1 (en) |
KR (1) | KR100499484B1 (en) |
CN (1) | CN100334789C (en) |
AU (1) | AU2003282410B2 (en) |
DE (1) | DE60331675D1 (en) |
WO (1) | WO2004047283A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007107134A1 (en) * | 2006-03-17 | 2007-09-27 | Temic Automotive Electric Motors Gmbh | Stator comprising an electrically insulating coating and method for reducing vibrations |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7342334B2 (en) * | 2004-10-29 | 2008-03-11 | Emerson Electric Co. | Insulated stator with wire routing element |
EP2036190B1 (en) * | 2006-06-21 | 2018-01-10 | LG Electronics Inc. | Stator of motor and washing machine having the same |
US8766507B2 (en) * | 2010-02-10 | 2014-07-01 | Mando Corporation | Motor pulley |
KR101514822B1 (en) | 2013-06-21 | 2015-04-23 | 한국파워트레인 주식회사 | Brush Less DC Motor |
WO2016100741A2 (en) * | 2014-12-19 | 2016-06-23 | Aerovironment, Inc. | Motor mount and damper |
KR102596993B1 (en) | 2018-11-20 | 2023-11-02 | 삼성전자주식회사 | Washing machine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100238816B1 (en) | 1997-10-22 | 2000-01-15 | 구자홍 | Stator structure for washing machine motor |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2039456A (en) * | 1931-11-14 | 1936-05-05 | Amato N Sammarone | Electric motor unit |
JPS561756A (en) * | 1979-06-20 | 1981-01-09 | Hitachi Ltd | Stator for electrical rotary machine |
JPS58186346A (en) * | 1982-04-23 | 1983-10-31 | Toshiba Corp | Insulating device for rotary electric machine |
JPS59172942A (en) * | 1983-03-18 | 1984-09-29 | Toshiba Corp | Interphase insulator of rotary electric machine |
DE3517330A1 (en) * | 1985-05-14 | 1986-11-20 | Robert Bosch Gmbh, 7000 Stuttgart | METHOD FOR REDUCING NOISE IN ELECTRICAL MACHINES AND NOISE-REDUCED ELECTRICAL MACHINE, IN PARTICULAR (TURN) ELECTRICITY GENERATOR |
JP2986853B2 (en) * | 1990-06-22 | 1999-12-06 | 株式会社日立製作所 | Motor stator winding |
JPH05236683A (en) * | 1992-02-24 | 1993-09-10 | Fuji Electric Co Ltd | Rotor of cylindrical synchronous machine |
US5300845A (en) * | 1993-04-05 | 1994-04-05 | General Electric Company | Banded electromagnetic stator core |
JP3675074B2 (en) * | 1996-12-04 | 2005-07-27 | 株式会社デンソー | Landel core type rotary electric machine |
JPH11136896A (en) * | 1997-10-31 | 1999-05-21 | Matsushita Electric Ind Co Ltd | Motor stator and manufacture thereof |
US6084320A (en) * | 1998-04-20 | 2000-07-04 | Matsushita Refrigeration Company | Structure of linear compressor |
DE19901104B4 (en) * | 1999-01-14 | 2007-06-21 | Robert Bosch Gmbh | Electric motor, in particular permanently excited DC motor |
JP2001298883A (en) * | 2000-04-13 | 2001-10-26 | Hitachi Ltd | Stator and motor |
US6448685B1 (en) * | 2000-09-28 | 2002-09-10 | General Electric Company | Stator core assembly |
KR100442925B1 (en) * | 2001-03-29 | 2004-08-02 | 주식회사 엘지이아이 | A driving force transfer member for washing machine |
KR100698197B1 (en) * | 2001-04-02 | 2007-03-22 | 엘지전자 주식회사 | Structure for preventing noise of motor in full automation-type washing machine |
KR102388816B1 (en) * | 2020-03-16 | 2022-04-21 | 주식회사 이드웨어 | Method and apparatus for creating a process for training a user's cognitive abilities |
-
2002
- 2002-11-20 KR KR10-2002-0072440A patent/KR100499484B1/en not_active IP Right Cessation
-
2003
- 2003-11-20 AU AU2003282410A patent/AU2003282410B2/en not_active Expired
- 2003-11-20 WO PCT/KR2003/002506 patent/WO2004047283A2/en active IP Right Grant
- 2003-11-20 DE DE60331675T patent/DE60331675D1/en not_active Expired - Lifetime
- 2003-11-20 CN CNB2003801036231A patent/CN100334789C/en not_active Expired - Lifetime
- 2003-11-20 EP EP03774265A patent/EP1570563B1/en not_active Expired - Lifetime
- 2003-11-20 US US10/484,508 patent/US7042120B2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100238816B1 (en) | 1997-10-22 | 2000-01-15 | 구자홍 | Stator structure for washing machine motor |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007107134A1 (en) * | 2006-03-17 | 2007-09-27 | Temic Automotive Electric Motors Gmbh | Stator comprising an electrically insulating coating and method for reducing vibrations |
Also Published As
Publication number | Publication date |
---|---|
US20050162024A1 (en) | 2005-07-28 |
DE60331675D1 (en) | 2010-04-22 |
EP1570563B1 (en) | 2010-03-10 |
CN100334789C (en) | 2007-08-29 |
US7042120B2 (en) | 2006-05-09 |
WO2004047283A3 (en) | 2004-09-16 |
CN1714491A (en) | 2005-12-28 |
AU2003282410B2 (en) | 2007-04-19 |
KR100499484B1 (en) | 2005-07-05 |
AU2003282410A1 (en) | 2004-06-15 |
EP1570563A2 (en) | 2005-09-07 |
KR20040043962A (en) | 2004-05-27 |
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