WO2005074106A1 - Method of balancing an suction unit comprising a ventilator and an electric motor - Google Patents
Method of balancing an suction unit comprising a ventilator and an electric motor Download PDFInfo
- Publication number
- WO2005074106A1 WO2005074106A1 PCT/IB2005/050282 IB2005050282W WO2005074106A1 WO 2005074106 A1 WO2005074106 A1 WO 2005074106A1 IB 2005050282 W IB2005050282 W IB 2005050282W WO 2005074106 A1 WO2005074106 A1 WO 2005074106A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rotor
- torque
- amount
- turbine unit
- rotatable part
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/16—Centering rotors within the stator; Balancing rotors
- H02K15/165—Balancing the rotor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49236—Fluid pump or compressor making
- Y10T29/49238—Repairing, converting, servicing or salvaging
Definitions
- the invention relates to a method of manufacturing an electrical suction unit for a vacuum cleaner, which suction unit comprises a turbine unit and an electric motor with a rotor and a stator, wherein the turbine unit is mounted to the rotor and forms, together with the rotor, a part of the suction unit that is rotatable about an axis of rotation, according to 5 which method an amount of material is removed from the rotor in order to torque-balance the rotatable part.
- Figs la shows a circularly cylindrical body 1 which is rotatable about an axis0 of rotation 3 which coincides with a center line of the body 1.
- the center of gravity of the body 1 will be situated on the axis of rotation 3 and the body 1 will be capable of performing a true, balanced rotational movement about the axis of rotation 3. If, however, an amount of material 5 is removed from the body 1 at a location near a center plane 7 extending perpendicularly to the axis of rotation 3, then the5 body 1 will have so-termed static imbalance with respect to the axis of rotation 3.
- this static imbalance is shown by means of a vector S with a direction that is determined by the position of the amount of material 5 with respect to the axis of rotation 3, and a size (in kg.m) that is determined by the mass of the amount of material 5 and the distance a between the amount of material 5 and the axis of rotation 3. If the body 1 is rotatably bearing-mounted0 near the ends of the axis of rotation 3, the static imbalance S during the rotation of the body 1 will lead to mutually equally large and equally directed varying forces on the bearings.
- a method of manufacturing an electrical suction unit of the type mentioned in the opening paragraph is generally known and commonly used.
- the torque imbalance of the rotatable part of the suction unit after assembly is mainly caused in the majority of cases by the fact that the rotor of the electric motor has an inherent torque imbalance.
- Said torque imbalance of the rotor is caused by the fact that the rotor comprises a large number of parts that are assembled together, such as a number of electric coils, a laminated soft-iron core, and a commutator.
- the rotatable part is torque-balanced by removing an amount of material from the rotor, for example from the soft-iron core.
- the rotor is separately mounted onto a balancing machine by means of which the position and the amount of the material to be removed is determined. Subsequently, the rotor and the turbine unit are assembled together.
- a drawback of the known method resides in that the amount of material to be removed from the rotor in order to torque-balance the rotatable part is comparatively large. It has been found that the electrical performance of the motor is adversely affected thereby.
- the known method is not applicable because the amount of core material that can be removed without impermissible reductions in motor performance is insufficient to enable the rotatable part to be torque-balanced. It is an object of the invention to provide a method of manufacturing an electrical suction unit of the type mentioned in the opening paragraph, wherein the amount of material to be removed from the rotor in order to torque-balance the rotatable part of the suction unit is reduced considerably.
- a method in accordance with the invention for manufacturing an electrical suction unit is characterized in that in order to torque-balance the rotatable part, an amount of material is removed also from the turbine unit.
- the rotor and the turbine unit of a suction unit manufactured in accordance with a method according to the invention each individually cause a torque imbalance of the rotatable part of the suction unit. Said torque imbalances of the rotor and the turbine unit cancel each other, however, in such a manner that the rotatable part as a whole is sufficiently or completely torque-balanced.
- a particular embodiment of a method in accordance with the invention is characterized in that the amount of material that is removed from the rotor is situated near a side of the rotor facing away from the turbine unit.
- the center of gravity of the rotatable part of the suction unit is situated close to the side of the rotor facing the turbine unit.
- the amount of material to be removed from the rotor is situated near the side of the rotor facing away from the turbine unit, the amount of material to be removed from the rotor has a torque ann which is as large as possible with respect to said center of gravity. As a result, the necessary amount of material to be removed from the rotor is further reduced.
- a particular embodiment of a method in accordance with the invention is characterized in that the amount of material that is removed from the rotor is situated in a plane extending perpendicularly to the axis of rotation and through a center of gravity of the rotatable part.
- the rotatable part of the suction unit is torque- balanced by removing an amount of material solely from the turbine unit.
- the static imbalance of the rotatable part due to the removal of said material from the turbine unit is compensated for by the removal of said amount of material from the rotor.
- this amount of material has no influence on the torque balance of the rotatable part.
- a further embodiment of a method in accordance with the invention is characterized in that by removing the amount of material from the turbine unit, the turbine unit itself is provided with a static imbalance equal to and oppositely directed to a static imbalance with which the rotor itself is provided by the removal of the amount of material from the rotor. In this manner it is achieved that the torque-balancing of the rotatable part does not lead to a static imbalance of the rotatable part.
- Yet another embodiment of a method in accordance with the invention is characterized in that in a first step, a torque imbalance of the rotor itself is measured, in a second step the static imbalance with which the turbine unit and the rotor are to be provided to compensate for the measured torque imbalance of the rotor is predetermined, in a third step, the rotor is provided with the predetermined static imbalance, in a fourth step, the rotor is mounted to the turbine unit, and in a fifth step, the rotatable part is torque-balanced by providing the turbine unit with the predetermined static imbalance.
- the invention further relates to a vacuum cleaner which is provided with an electrical suction unit manufactured in accordance with a method according to the invention.
- FIG. 2 diagrammatically shows an electrical suction unit manufactured in accordance with a method according to the invention
- Fig. 3 diagrammatically shows a rotatable part of an electrical suction unit manufactured in accordance with a first embodiment of a method according to the invention
- Fig. 4 diagrammatically shows a rotatable part of an electrical suction unit manufactured in accordance with a second embodiment of a method according to the invention.
- FIG. 2 diagrammatically shows the most important parts of an electrical suction unit 11 which is manufactured in accordance with a method of the invention.
- the suction unit 11 can suitably be used in a vacuum cleaner, which will neither be discussed in detail hereinbelow nor further illustrated in the Figures.
- the suction unit 11 comprises a turbine unit 13 and an electric motor 15 which includes a stator 17 and a rotor 19.
- the turbine unit 13 is mounted to the rotor 19 via a central shaft 21 and forms, together with the rotor 19 and the central shaft 21, a part 25 of the suction unit 11 that can be rotated about an axis of rotation 23.
- the stator 17 is attached to a housing (not shown) of the suction unit 11.
- the central shaft 21 is rotatably mounted in said housing by means of bearings (not shown).
- the turbine unit 13 is driven in rotation by means of the motor 15, as a result of which the suction unit 11 generates in said vacuum cleaner an air flow and a partial vacuum which are necessary for the sucking action of the vacuum cleaner.
- the rotatable part 25 of the suction unit 11 would exhibit a torque imbalance after assembly, which leads to undesirable, varying forces on the bearings of the central shaft 21 and to vibrations of the suction unit 11. Said torque imbalance is caused predominantly by a torque imbalance of the rotor 19 of the electric motor 15.
- Said torque imbalance of the rotor 19 is caused by the fact that the rotor 19 comprise a large number of mutually assembled parts, such as a number of electric coils, a laminated soft- iron core and a commutator, which are not shown in further detail in the Figures for the sake of simplicity.
- a method in accordance with the invention for the manufacture of the suction unit 11 are described, wherein for the purpose of torque- balancing the rotatable part 25, amounts of material are removed from the rotor 19 and from the turbine unit 13.
- Fig. 3 shows a rotatable part 25' of a suction unit manufactured in accordance with a first embodiment of a method according to the invention.
- Fig. 3 shows a rotatable part 25' of a suction unit manufactured in accordance with a first embodiment of a method according to the invention.
- a torque imbalance is measured which is inherent to the rotor 19' after assembly of the rotor 19'.
- the measured torque imbalance is shown in Fig. 3 by means of a torque vector T around a center of gravity 27 of the rotatable part 25'.
- the center of gravity 27 is situated near a side face 29 of the rotor 19' facing the turbine unit 13' because the mass of the rotor 19' is much larger than the mass of the turbine unit 13'.
- the center of gravity 27 in Fig. 3 is drawn in the side face 29, however, it is noted that this is not to be construed in any way as limiting the scope of protection of the invention.
- the rotatable part 25' is torque-balanced, i.e.
- the torque imbalance T of the rotor 19' is compensated for by providing equally large, yet oppositely directed static imbalances Si and S 2 at the location of, respectively, turbine unit 13' and a side face 31 of the rotor 19' facing away from the turbine unit 13'.
- the necessary size of the static imbalances Si and S 2 is predetermined, in a second step of the method, on the basis of the size of the measured torque imbalance T and the distances bi and b 2 from the static imbalances Si and S 2 to be provided to the center of gravity 27.
- the predetermined static imbalance S 2 is provided on the rotor 19'.
- the turbine unit 13', the rotor 19' and the central shaft 21' are assembled into the rotatable part 25', so that the rotor 19' is secured to the turbine unit 13'.
- the rotatable part 25' thus assembled is mounted on a conventional balancing machine. Said balancing machine measures the static imbalance S 2 .
- the balancing machine is calibrated such that a static imbalance necessary to compensate for the measured static imbalance S 2 is provided by the balancing machine on the turbine unit 13' at a distance bi to the center of gravity 27.
- Said compensating static imbalance provided on the turbine unit 13' will be equally large as, yet oppositely directed to, the static imbalance S 2. i.e. approximately equal to the predetermined static imbalance Si, so that the rotatable part 25' becomes torque-balanced.
- the static imbalance Si is provided by removing an amount of material 35 from the turbine unit 13', for example at a location near the circumference of the turbine unit 13', at a distance ai to the rotation axis 23'.
- the amount of material 35 to be removed is determined by the size of the static imbalance Si to be provided and by the distance a .
- an amount of material 35 is removed from the turbine unit 13' in order to torque-balance the rotatable part 25'
- the amount of material 33 which is to be removed from the rotor 19' in order to torque-balance the rotatable part 25' is limited substantially.
- the distance bi i.e. the torque arm of the static imbalance Si of the turbine unit 13', is comparatively large, so that the amount of material 35 has a comparatively great influence on the torque balance of the rotatable part 25'.
- the amount of material 35 to be removed from the turbine unit 13', and also the amount of material 33 to be removed from the rotor 19' are limited.
- the distance b 2 i.e. the torque arm of the static imbalance S 2 of the rotor 19', is as large as possible, so that the amount of material 33 to be removed from the rotor 19' is further reduced.
- the static imbalances Si and S 2 necessary to torque-balance the rotatable part 25' are predetermined such that they are equally large yet oppositely directed, it is achieved that the provision of the static imbalances Si and S 2 does not lead to an additional static imbalance of the rotatable part 25'.
- the torque- balancing of the rotatable part 25' can take place in a comparatively simple manner by measuring and compensating the static imbalance Si provided on the rotor 19' in the third step of the method. As a result, the torque- balancing process and the balancing machine necessary for this process are simplified.
- the balancing process and the balancing machine necessary for this purpose are also simplified by the fact that, in the fifth step of the method in which the rotatable part 25' is assembled already and is being balanced by means of the balancing machine, material is removed solely from the turbine unit 13'.
- material is removed solely from the turbine unit 13'.
- the amount of material 33 to be removed from the rotor 19' is comparatively small, it is achieved that the removal of the material 33 from the rotor 19' has as little influence as possible on the performance of the electric motor 15.
- the method in accordance with the invention is particularly suited for suction units operating at a comparatively high rotational speed, because the rotor of the electric motor of such a suction unit comprises only a comparatively small amount of core material. Fig.
- FIG. 4 shows a rotatable part 25" of a suction unit manufactured in accordance with a second embodiment of a method of the invention.
- parts of the rotatable part 25" which correspond to parts of the rotatable part 25' shown in Fig. 3 are indicated by means of the same reference numerals.
- a torque imbalance which is inherent to the rotor 19" is measured after assembly of the rotor 19".
- the measured torque imbalance is shown in Fig. 4 by means of a torque vector T' around a center of gravity 27' of the rotatable part 25".
- the second embodiment of the method according to the invention differs basically from the first embodiment of the method in that the rotatable part 25" is torque- balanced by the provision of equally large, yet oppositely directed static imbalances Si' and S 2 ' at the location of, respectively, turbine unit 13" and a plane 37 which extends perpendicularly to the axis of rotation 23" and through the center of gravity 27' of the rotatable part 25".
- the center of gravity 27' lies approximately in the side face 29' of the rotor 19" facing the turbine unit 13"
- the static imbalance is thus provided in the side face 29' of the rotor 19".
- the necessary size of the static imbalances Si' and S 2 ' is predetermined, in a second step of the method, on the basis of the size of the measured torque imbalance T' and the distance bi' from the static imbalance Si' to be provided to the center of gravity 27'.
- the predetermined static imbalance S 2 ' is provided on the rotor 19'. This is achieved by removing an amount of material 33' from the rotor 19" at a location near the side face 29' at a distance a 2 ' to the axis of rotation 23". The amount of material 33' to be removed is determined by the size of the static imbalance S 2 ' to be provided and by the distance a 2 '.
- the turbine unit 13", the rotor 19" and the central axis 21" are assembled into the rotatable part 25", so that the rotor 19" is secured to the turbine unit 13".
- the rotatable part 25" thus assembled is mounted on a conventional balancing machine.
- Said balancing machine measures the static imbalance S 2 '.
- the balancing machine is calibrated such that a static imbalance necessary to compensate for the measured static imbalance S 2 ' is provided by the balancing machine on the turbine unit 13" at the distance bj' to the center of gravity 27'.
- the compensating static imbalance provided on the turbine unit 13" will be equally large as, yet oppositely directed to, the static imbalance S 2 ', i.e. approximately equal to the predetermined static imbalance Si', so that the rotatable part 25" becomes torque-balanced.
- the provision of the static imbalance Si' takes place by the removal of a quantity of material 35' from the turbine unit 13" at a distance ai ' to the axis of rotation 23".
- the amount of material 35' to be removed is determined by the size of the static imbalance Si' to be provided and by the distance ai'.
- the torque imbalance T' is thus compensated solely by means of the static imbalance Si' provided in the turbine unit 13".
- Said static imbalance SI' is statically compensated by means of the static imbalance S 2 ' provided in the rotor 19".
- the static imbalance S 2 ' has no influence on the torque balance of the rotatable part 25" provided by means of the static imbalance Si '.
- the rotatable part 25', 25" is mounted, after assembly, on a conventional balancing machine, after which the turbine unit 13', 13" is provided with the necessary static imbalance Si, Si'.
- the invention also includes embodiments wherein, following its assembly, the rotatable part is mounted, together with the stator of the electric motor, in the housing of the suction unit, after which the assembled suction unit is mounted on the balancing machine and the rotatable part is balanced in the suction unit.
- the amounts of material 33, 33', 35, 35' to be removed from the rotor 19', 19" and the turbine unit 13', 13" are removed from positions which are as remote as possible from the axis of rotation 23', 23".
- the invention also includes embodiments wherein the material to be removed is removed from positions which are closer to the axis of rotation. In these alternative embodiments, the amount of material to be removed is generally larger, but the alternative embodiments offer a wider choice as regards the positions where tine material is removed.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
- Electric Suction Cleaners (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/588,068 US7426858B2 (en) | 2004-01-29 | 2005-01-25 | Method of balancing a suction unit comprising a ventilator and an electric motor |
EP05702770A EP1730834A1 (en) | 2004-01-29 | 2005-01-25 | Method of balancing an suction unit comprising a ventilator and an electric motor |
JP2006550446A JP2007523581A (en) | 2004-01-29 | 2005-01-25 | Method for balancing an intake unit having a ventilator and an electric motor |
US12/233,883 US20090022590A1 (en) | 2004-01-29 | 2008-09-19 | Method of balancing a suction unit comprising a ventilator and an electric motor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04100318.7 | 2004-01-29 | ||
EP04100318 | 2004-01-29 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/233,883 Continuation US20090022590A1 (en) | 2004-01-29 | 2008-09-19 | Method of balancing a suction unit comprising a ventilator and an electric motor |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005074106A1 true WO2005074106A1 (en) | 2005-08-11 |
Family
ID=34814372
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2005/050282 WO2005074106A1 (en) | 2004-01-29 | 2005-01-25 | Method of balancing an suction unit comprising a ventilator and an electric motor |
Country Status (5)
Country | Link |
---|---|
US (2) | US7426858B2 (en) |
EP (1) | EP1730834A1 (en) |
JP (1) | JP2007523581A (en) |
CN (1) | CN100474743C (en) |
WO (1) | WO2005074106A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7500432B2 (en) * | 2005-10-28 | 2009-03-10 | Van Denend Mark E | Apparatus and method for balancing a printing roller having an image producing area on its outer surface |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1870988A1 (en) * | 2006-06-22 | 2007-12-26 | ALSTOM Technology Ltd | Method and device for balancing a rotor of an electrical machine |
JP5170822B2 (en) * | 2007-06-27 | 2013-03-27 | 日本電産株式会社 | Rotor holder, motor and blower fan, and method for manufacturing rotor holder |
JP6717029B2 (en) * | 2015-11-09 | 2020-07-01 | 日本電産株式会社 | Blower and cleaning equipment |
EP3540916A4 (en) * | 2016-11-11 | 2019-10-16 | Panasonic Intellectual Property Management Co., Ltd. | Rotating body, electric blower, and method for manufacturing rotating body |
JP6988548B2 (en) * | 2018-02-20 | 2022-01-05 | 三菱電機株式会社 | How to make fan motors, fan motors and vacuum cleaners |
WO2019227045A1 (en) * | 2018-05-25 | 2019-11-28 | Sharkninja Operating Llc | Vacuum cleaner having reconfigurable weight distribution |
USD938114S1 (en) * | 2019-03-22 | 2021-12-07 | Sungrow Power Supply Co., Ltd. | Intelligent cleaning robot |
DE102019108669A1 (en) | 2019-04-03 | 2020-10-08 | Alfmeier Präzision SE | Simplified balancing compressor and method of making such a compressor |
US20230023540A1 (en) * | 2021-07-26 | 2023-01-26 | Samsung Electronics Co., Ltd. | Motor assembly and method of manufacturing the same |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2756829A1 (en) * | 1977-12-20 | 1979-06-21 | Hofmann Gmbh & Co Kg Maschinen | Rotating machine balance and phase parameters measurement - involves use of oscillator and computer with clocked intermediate input store |
WO1984001863A1 (en) * | 1982-11-01 | 1984-05-10 | Storage Technology Partners | A brushless direct current motor with inverted magnet cup |
JPH0865956A (en) * | 1994-06-17 | 1996-03-08 | Hitachi Ltd | Balance correcting method for motor driven blower and balance measuring apparatus for rotor |
DE19501959A1 (en) * | 1995-01-24 | 1996-07-25 | Bosch Gmbh Robert | Dynamic balancing apparatus for high-speed DC powered air blower |
EP0962660A1 (en) * | 1998-06-05 | 1999-12-08 | MAGNETI MARELLI CLIMATIZZAZIONE S.p.A. | A method for assembling an electric fan |
WO2000072740A1 (en) * | 1999-05-31 | 2000-12-07 | Türk Elektrik Endüstrisi A.Ş. | Wet and dry electrical vacuum cleaner motor with reduced balance problems arising from assembly |
WO2004057195A1 (en) * | 2002-12-18 | 2004-07-08 | Robert Bosch Gmbh | Electrically driven air pump and method for the production thereof |
-
2005
- 2005-01-25 EP EP05702770A patent/EP1730834A1/en not_active Withdrawn
- 2005-01-25 WO PCT/IB2005/050282 patent/WO2005074106A1/en not_active Application Discontinuation
- 2005-01-25 US US10/588,068 patent/US7426858B2/en not_active Expired - Fee Related
- 2005-01-25 CN CNB2005800035033A patent/CN100474743C/en not_active Expired - Fee Related
- 2005-01-25 JP JP2006550446A patent/JP2007523581A/en not_active Withdrawn
-
2008
- 2008-09-19 US US12/233,883 patent/US20090022590A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2756829A1 (en) * | 1977-12-20 | 1979-06-21 | Hofmann Gmbh & Co Kg Maschinen | Rotating machine balance and phase parameters measurement - involves use of oscillator and computer with clocked intermediate input store |
WO1984001863A1 (en) * | 1982-11-01 | 1984-05-10 | Storage Technology Partners | A brushless direct current motor with inverted magnet cup |
JPH0865956A (en) * | 1994-06-17 | 1996-03-08 | Hitachi Ltd | Balance correcting method for motor driven blower and balance measuring apparatus for rotor |
DE19501959A1 (en) * | 1995-01-24 | 1996-07-25 | Bosch Gmbh Robert | Dynamic balancing apparatus for high-speed DC powered air blower |
EP0962660A1 (en) * | 1998-06-05 | 1999-12-08 | MAGNETI MARELLI CLIMATIZZAZIONE S.p.A. | A method for assembling an electric fan |
WO2000072740A1 (en) * | 1999-05-31 | 2000-12-07 | Türk Elektrik Endüstrisi A.Ş. | Wet and dry electrical vacuum cleaner motor with reduced balance problems arising from assembly |
WO2004057195A1 (en) * | 2002-12-18 | 2004-07-08 | Robert Bosch Gmbh | Electrically driven air pump and method for the production thereof |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 07 31 July 1996 (1996-07-31) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7500432B2 (en) * | 2005-10-28 | 2009-03-10 | Van Denend Mark E | Apparatus and method for balancing a printing roller having an image producing area on its outer surface |
Also Published As
Publication number | Publication date |
---|---|
US7426858B2 (en) | 2008-09-23 |
US20090022590A1 (en) | 2009-01-22 |
US20070131027A1 (en) | 2007-06-14 |
EP1730834A1 (en) | 2006-12-13 |
CN100474743C (en) | 2009-04-01 |
CN1914784A (en) | 2007-02-14 |
JP2007523581A (en) | 2007-08-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7426858B2 (en) | Method of balancing a suction unit comprising a ventilator and an electric motor | |
US20140134012A1 (en) | Impeller and electric blower having the same | |
JP2008082212A (en) | Blowing fan | |
US9284961B2 (en) | Fan device | |
US20170033649A1 (en) | Method for correcting unbalance of rotor | |
JP2006029338A (en) | Rotary vacuum pump, balance regulating structure thereof, and method of regulating balance therein | |
US20080170935A1 (en) | Axial-flow fan | |
CN113675982A (en) | Rotating electrical machine and fan | |
RU2177670C1 (en) | Small-size dynamically balanced electric motor | |
US11264846B2 (en) | Split stator body for an electric machine | |
KR102220863B1 (en) | Rotor, motor having the same and method for balancing of rotor | |
KR100973284B1 (en) | Rotor for brushless motor and method of manufacturing the rotor | |
JP4151404B2 (en) | Compressor and compressor balancing method | |
JP3446373B2 (en) | Electric blower balance correction method | |
JP2003111365A (en) | Method of adjusting balance of armature | |
CN217282545U (en) | Motor | |
JP2001045723A (en) | Structure of adjusting balance of rotating body in rotating machine | |
JPH07143709A (en) | Rotor for electric motor | |
CN207625380U (en) | Motor and its rotor structure and balance element | |
US11962224B2 (en) | Rotor, motor, fan, and electric vacuum cleaner or hand dryer | |
CN220067184U (en) | Brushless motor | |
KR20190098426A (en) | Motor and method of manufacturing the same | |
JP6748615B2 (en) | Rotor for rotating electric machine | |
JP3298335B2 (en) | Rotating body mounting structure and electric blower using the same | |
JPH0914188A (en) | Balance correction method for motor-driven blower |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2005702770 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2007131027 Country of ref document: US Ref document number: 200580003503.3 Country of ref document: CN Ref document number: 2006550446 Country of ref document: JP Ref document number: 10588068 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWW | Wipo information: withdrawn in national office |
Country of ref document: DE |
|
WWP | Wipo information: published in national office |
Ref document number: 2005702770 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 10588068 Country of ref document: US |