[미국특허]
Motor and vibration reduction system for a motor
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02K-005/15
H02K-005/24
H02K-001/18
출원번호
US-0754259
(2013-01-30)
등록번호
US-9496765
(2016-11-15)
발명자
/ 주소
Zheng, Nengan
출원인 / 주소
Regal Beloit America, Inc.
대리인 / 주소
Michale Best & Friedrich LLP
인용정보
피인용 횟수 :
0인용 특허 :
24
초록▼
A motor includes a rotor supported for rotation about a longitudinal axis, a stator including a magnetic core, a first end plate positioned at a first end of the magnetic core, and a second end plate positioned at a second end of the magnetic core. The magnetic core, first end plate, and second end
A motor includes a rotor supported for rotation about a longitudinal axis, a stator including a magnetic core, a first end plate positioned at a first end of the magnetic core, and a second end plate positioned at a second end of the magnetic core. The magnetic core, first end plate, and second end plate cooperate to define a central opening. The motor also includes a plurality of rods each fixedly attached to the first end plate and the second end plate and including a first end that extends along the longitudinal axis beyond the first end plate and a second end that extends along the longitudinal axis beyond the second end plate. A first support disk is coupled to the first end of each of the rods and a second support disk is coupled to the second end of each of the rods.
대표청구항▼
1. A motor comprising: a rotor supported for rotation about a longitudinal axis;a stator including a magnetic core having a plurality of laminations stacked along the longitudinal axis;a first end plate positioned at a first end of the magnetic core;a second end plate positioned at a second end of t
1. A motor comprising: a rotor supported for rotation about a longitudinal axis;a stator including a magnetic core having a plurality of laminations stacked along the longitudinal axis;a first end plate positioned at a first end of the magnetic core;a second end plate positioned at a second end of the magnetic core, the magnetic core, the first end plate, and the second end plate cooperating to define a central opening, at least a portion of the rotor disposed within the central opening;a plurality of rods, each rod movable with respect to and spaced apart from each of the plurality of laminations and fixedly and directly attached to the first end plate and the second end plate and including a first end that extends parallel to the longitudinal axis beyond the first end plate in a direction away from the magnetic core and a second end that extends parallel to the longitudinal axis beyond the second end plate in a direction away from the magnetic core;a first support disk coupled to the first end of each of the plurality of rods such that the first support disk is spaced apart from the first end plate; anda second support disk coupled to the second end of each of the plurality of rods such that the second support disk is spaced apart from the second end plate. 2. The motor of claim 1, wherein the magnetic core includes a plurality of slots that extend along an outer portion of the magnetic core substantially parallel to the longitudinal axis, and wherein one of the plurality of rods is disposed at least partially within each of the plurality of slots. 3. The motor of claim 1, wherein each of the plurality of rods includes a length, a cross-sectional shape, a cross-sectional area, and a stiffness that cooperate to define a natural frequency. 4. The motor of claim 3, wherein the length of each rod is between 1.1 and 2.5 times a length of the magnetic core measured along the longitudinal axis. 5. The motor of claim 3, wherein the length, the cross-sectional shape, the cross-sectional area, and the stiffness of each rod are selected such that the natural frequency of the rod is different from a vibrational frequency of the magnetic core to dampen vibration of the motor. 6. The motor of claim 3, wherein the length of one of the plurality of rods is different from the length of another of the plurality of rods. 7. The motor of claim 6, wherein the first support disk includes a plurality of apertures each sized to receive one of the rods, and wherein the first support disk defines a first thickness adjacent one of the apertures and a second thickness adjacent a second one of the apertures, the second thickness being different than the first thickness. 8. The motor of claim 1, further comprising an external housing positioned to support the rotor and the magnetic core, the external housing including an outer wall, a first end frame, and a second end frame. 9. The motor of claim 8, wherein the first support disk engages the first end frame and the outer wall and the second support disk engages the second end frame and the outer wall to completely support the magnetic core. 10. The motor of claim 9, wherein a connection between the first support disk, the second support disk, the first end frame, the second end frame, and the outer wall are the sole connections between the exterior housing and the magnetic core. 11. A method of reducing vibration of a motor, the method comprising: supporting a rotor for rotation about a longitudinal axis, the rotor supported at a first end and a second end by an external housing;selecting each of a plurality of rods, each of the rods having a length, a cross-sectional shape, a cross-sectional area, and a stiffness that define a natural frequency for each rod, each rod selected to have a desired natural frequency, wherein at least one of the plurality of rods is tuned to a natural frequency that is different than at least one other of the plurality of rods;fixedly and directly coupling each of the plurality of rods to each end of a magnetic core of a stator such that a first end of each rod extends beyond the magnetic core and a second end of each rod extends beyond the magnetic core;connecting a first support disk to the first ends of each of the rods;connecting a second support disk to the second ends of each of the rods;engaging the first support disk, the second support disk and the external housing to support the magnetic core of the stator; anddamping vibration of the motor by tuning the frequency of each of the plurality of rods individually to be different from the vibrational frequency of the magnetic core. 12. The method of claim 11, wherein fixedly coupling each of the plurality of rods to the magnetic core of the stator includes welding each rod to a first end plate and a second end plate and attaching the first end plate and the second end plate to the magnetic core. 13. The method of claim 11, wherein selecting each of the plurality of rods includes selecting a first rod having a first length and selecting a second rod having a second length different from the first length. 14. The method of claim 13, wherein connecting the first support disk to the first ends of each of the rods includes connecting the first rod to the first support disk in a region where the first support disk has a first thickness and connecting the second rod to the first support disk in a region where the first support disk has a second thickness different than the first thickness. 15. A motor comprising: a housing including an outer wall, a first end frame and a second end frame;a rotor supported by the first end frame and the second end frame for rotation about a longitudinal axis;a first support disk coupled to the outer wall and the first end frame;a second support disk coupled to the outer wall and the second end frame;a plurality of rods, each rod having a rod length measured between a first end fixedly attached to the first support disk and a second end fixedly attached to the second support disk, the outer wall inhibiting radial movement of the first support disk and the second support disk with respect to the longitudinal axis and the first end frame and the second end frame cooperating to inhibit axial movement of the first support disk, the second support disk, and the plurality of rods along the longitudinal axis; anda stator core including a plurality of laminations, a first end plate at a first end of the plurality of laminations, and a second end plate at a second end of the plurality of laminations, the plurality of laminations, the first end plate, and the second end plate surrounding a portion of the rotor and having a stator length measured between the first end plate and the second end plate, the rod length being about 1.1 to 2.5 times the stator length, the first end plate and the second end plate fixedly and directly attached to each of the plurality of rods, and each of the plurality of laminations being separate from each of the plurality of rods. 16. The motor of claim 15, wherein the rods are the sole supporting connection between the stator core and the first support disk, the second support disk, and the outer wall. 17. The motor of claim 15, wherein one of the plurality of rods has a first rod length and a second of the plurality of rods has a second rod length different from the first rod length. 18. The motor of claim 15, wherein each of the plurality of rods includes a cross-sectional profile and a thickness, and wherein the cross-sectional profile, the thickness, and the rod length are selected to provide a rod having a desired natural frequency that is different from a frequency of the stator core.
Petersen,Christian C, Apparatus and method for dissipating a portion of the commutation derived collapsing field energy in a multi-phase unipolar electric motor.
Grant, Barron D.; Cufr, Thomas S.; Evon, Thomas S.; Lambert, Jr., Grayson W., Electric apparatus having a stator with insulated end laminations within the central opening of end plates.
Robert Fuller, Power generation system including an apparatus for low tuning a generator stator core upon attachment to a frame support and associated methods.
Boardman, IV, William Hunter; Dawson, Richard Nils; Marshall, Nathaniel Philip; Tanavde, Anand Shankar; Yamarthi, David Raju, Stator core suspension and related spring bar.
George, Jayan; Yagielski, John R.; Ronca, Donald; Tayi, Srujana, Systems, methods, and apparatus for controlling key bar movement in a stator assembly.
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