Suction Pump Or Fan Patents (Class 310/62)
  • Patent number: 7969050
    Abstract: A housing for an external rotor with a side wall; an end cover directly connected to the side wall; a cavity formed between the side wall and the end cover; a plurality of openings formed in the side wall; a plurality of wind wheels; a plurality of air inlets, each of the air inlets disposed one between adjacent wind wheels; a base disposed at the center of the end cover and connected to the side wall via the wind wheels; and a center hole disposed at the center of the base, the center hole for forming connection to a drive shaft of the external rotor. An external rotor with the housing, a magnetic conductive housing; and a plurality of magnetic tiles.
    Type: Grant
    Filed: May 25, 2009
    Date of Patent: June 28, 2011
    Assignee: Zhongshan Broad-Ocean Motor Co., Ltd.
    Inventor: Xu Zhang
  • Patent number: 7969051
    Abstract: The invention concerns a ventilation system for a rotary electrical machine of the type comprising a rotor mounted so as to rotate in a stator and a device for cooling by forced flow of a cooling fluid, such as air, provided with at least one fan fixed to the rotor and an independent fan disposed so as to be decisive for cooling at relatively low speeds of rotation of the rotor.
    Type: Grant
    Filed: September 19, 2006
    Date of Patent: June 28, 2011
    Assignee: Valeo Equipements Electriques Moteur
    Inventors: Claudiu Vasilescu, Michel Fakes
  • Publication number: 20110148230
    Abstract: An electric motor has a stator bushing in which components that generate heat are disposed. A rotor housing that has at least one air conveying element is rotatably connected to the stator bushing. The air conveying element has a top side that is facing the stator bushing and that is at least basically smooth. The air conveying element has an annular disk that is provided with the basically smooth top side. The air conveying element has flow guiding elements that are radially extending ribs provided on the bottom side of the annular disk.
    Type: Application
    Filed: December 15, 2010
    Publication date: June 23, 2011
    Applicant: ZIEHL-ABEGG AG
    Inventors: Joachim Knorr, Thorsten Sturm
  • Patent number: 7960880
    Abstract: The present invention provides an automotive electric motor-generator that can achieve sufficient cooling of a radiating plate by ensuring a sufficient cooling airflow ventilation channel within limited axial or radial dimensions. In the present invention, first and second radiating plates each form a fan shape, have N-channel power MOSFETs mounted thereto, and have a drain potential for the power MOSFETs. A first circuit board includes insert conductors that connect the power MOSFETs in series, and a second circuit board has insert conductors that are connected to source terminals of the power MOSFETs and that have negative potential. The first radiating plate, the second radiating plate, the first circuit board, and the second circuit board are disposed in a fan shape that is centered around a shaft so as to line up radially in a plane that is perpendicular to the shaft outside one axial end of a rear housing.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: June 14, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yasunari Hino, Yoshihito Asao
  • Publication number: 20110101803
    Abstract: Provided is a brushless AC generator for a vehicle, with improved cooling performance for an exiting core and an exciting coil. In the brushless AC generator for the vehicle, a rotor includes: magnetic-pole cores fixed to a shaft; a cylindrical exciting core fixed to a rear bracket, the exciting core being inserted into one of the magnetic-pole cores; and an exciting coil formed by winding a conductor around a minor-diameter portion of the exciting core. The rear bracket includes: vent holes for the rotor, through which cooling air generated by rotation of a cooling fin passes, the vent holes for the rotor being formed around a bearing housing portion for housing a rear bearing therein; and a guiding portion including an air duct for guiding the cooling air, which has passed through the vent holes for the rotor, to the exciting core.
    Type: Application
    Filed: January 13, 2010
    Publication date: May 5, 2011
    Inventor: Hideyuki HAYASHI
  • Patent number: 7923871
    Abstract: The invention relates to an electrical machine (1) having a stator (4) and a rotor (3), with the rotor (3) having a plurality of axially arranged cooling channels (8) and a first (5a) and a second (5b) end face, and a fan unit (6) being arranged adjacent to each end face and comprising at least two 10 fan segments (7), with one fan segment (7) in each case being associated with one cooling channel (8) and being arranged alternately adjacent to the first (5a) and the second (5b) end face, and with the fan segment (7) having at least one air guide channel (7a) and at least one air guide wall (7b).
    Type: Grant
    Filed: January 29, 2007
    Date of Patent: April 12, 2011
    Assignee: Siemens Aktiengesellschaft
    Inventor: Sebastian Weiss
  • Publication number: 20110074235
    Abstract: An electric motor assembly. A stator includes a set of windings and has a first end, a second end, and an outer radial surface. A rotor includes a shaft having an axis. A first frame supports the shaft at a first axial position. A canopy substantially surrounds the first frame. The canopy includes a fluid inlet and a fluid discharge. A second frame supports the shaft at a second axial position and includes at least one fluid outlet. A chute is positioned downstream of the canopy fluid discharge. The chute directs fluid flow along the outer radial surface of the stator towards the fluid outlet. A fan is coupled to the shaft downstream of the fluid outlet for rotation with the shaft.
    Type: Application
    Filed: September 29, 2010
    Publication date: March 31, 2011
    Inventors: Ngan Fai Leung, Stephen Thomas English, John R. Belko, Matthew William Critchley, Janice Fitzgerald, Frank Edward Staigl, III, Joseph Henry, Barbara Mary Shanks, Stephanie Marie Belko
  • Patent number: 7898126
    Abstract: An inverter-integrated rotating electric machine includes an enclosure in which a vent hole is formed, an AC motor accommodated in the enclosure, the AC motor including a rotor and a fan whose rotation introduces external air into the enclosure from outside through the vent hole, the fan being fixed to the rotor, and an inverter unit accommodated in the enclosure and disposed in the vent hole. The inverter unit includes a power circuit portion and a control circuit portion whose control board is housed in a case which thermally isolates the control board from the power circuit portion. The power circuit portion is located at a position facing the fan and the control circuit portion is located upstream of the power circuit portion with respect to an inflow of the external air. Signal lines from the power circuit portion are connected to signal lines from the control circuit portion through holes formed in the case.
    Type: Grant
    Filed: June 20, 2006
    Date of Patent: March 1, 2011
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masaki Kato, Hiroyuki Akita, Yoshihito Asao
  • Publication number: 20110037330
    Abstract: The present invention relates to an open rotary electric machine having a rotor mounted to rotate relative to at least one stator and co-operating with the stator to define at least one airgap, the rotor being suitable for rotating at least one fan having at least two channels, said fan including a first channel generating a first cooling air stream passing through the stator, and a second channel generating a second cooling air stream passing through the rotor, the fan including a solid web separating the first and second air streams.
    Type: Application
    Filed: February 16, 2009
    Publication date: February 17, 2011
    Inventor: Alexis Dutau
  • Patent number: 7880347
    Abstract: A belt-driven electric machine for a vehicle includes a front housing including at least one front housing opening and a rear housing including at least one rear housing opening. The electric machine further includes at least one fan capable of urging cooling air into the electric machine through the at least one front housing opening and out of the electric machine through the at least one rear housing opening. A method for cooling a belt-driven electric machine for a vehicle includes urging cooling air into the electric machine at substantially the front of the electric machine. The cooling air is flowed substantially rearward in the electric machine, and heat is radiated from the electric machine into the cooling air. At least a first portion of the cooling air is expelled from the rear of the electric machine in a substantially axial direction.
    Type: Grant
    Filed: August 2, 2007
    Date of Patent: February 1, 2011
    Assignee: Remy Technologies, Inc.
    Inventor: Michael D. Bradfield
  • Patent number: 7872381
    Abstract: A counter-rotating axial-flow fan is provided that is capable of increasing effect of cooling a stator. One or more through-holes 83 penetrating support frame bodies (21, 75) in the axial direction are formed in support frame bodies 21 and 75. One or more vent holes 57a for introducing air, sucked from a suction port 19, into a cup-like member 51 are formed in a bottom wall portion 57 of a cup-like member 51 of a first impeller 9. One or more vent holes 111a for discharging air, introduced into an internal space of a second motor 61, to the outside are formed in a bottom wall portion 111 of a cup-like member 105 of a second impeller 63.
    Type: Grant
    Filed: November 5, 2007
    Date of Patent: January 18, 2011
    Assignee: Sanyo Denki Co., Ltd.
    Inventors: Jiro Watanabe, Toshiya Nishizawa, Yasuhiro Maruyama
  • Publication number: 20110006622
    Abstract: An electric machine with improved cooling efficiency includes a stator, a rotor operating as a rotor fan and comprising a shaft defining an axial direction and having radial and axial cooling channels, and an axial fan configured as a twin axial fan and arranged coaxially with the shaft and supplying a coolant to the axial cooling channels. The axial fan has first and second blade rings and a funnel-shaped tube with a smaller opening directly connected to the axial cooling channels of the rotor to deliver coolant to the axial cooling channels of the rotor, and a larger opening, which is non-rotatably connected to and encloses the first blade ring. The second blade ring is firmly attached at an outer circumference of the funnel-shaped tube to deliver the coolant to the stator. Both the stator and the rotor can be cooled using an efficient coolant flow.
    Type: Application
    Filed: November 6, 2008
    Publication date: January 13, 2011
    Applicant: Siemens Aktiengesellschaft
    Inventors: Sebastian Weiss, Christian Deeg, Ekkehard Ressel
  • Patent number: 7863786
    Abstract: A drive apparatus for a washing machine includes an electric motor, a drive shaft connected to the electric motor for rotary drive purposes and electronics for controlling operation of the electric motor. In order to achieve a compact construction, the electric motor and the electronics are integrated in a common unit. In order to increase operational reliability of the drive apparatus together with a simple construction, the common unit has a wall which is thermally coupled both to the electric motor and to the electronics and serves to dissipate heat. The electronics have a temperature sensor for detecting the temperature of the wall. Both the temperature of the electric motor and the temperature of the electronics can be monitored with this one temperature sensor.
    Type: Grant
    Filed: January 21, 2009
    Date of Patent: January 4, 2011
    Assignee: Diehl AKO Stiftung & Co. KG
    Inventors: Martin Weinmann, Alexander Müller
  • Publication number: 20100301689
    Abstract: To provide a brushless AC generator for a vehicle, which is capable of improving a cooing performance for an excitation coil and increasing an output of electric power generation with a simple structure. An external fan 11 fixed to a shaft 10 outside the brackets 5 and 6 and an internal fan 34 fixed to a rotor assembled body 21 formed from a first rotor pole 22 and a second rotor pole 23 united into one body, the internal fan 34 having fan blade 34a provided in a valley part 22b between claw poles 22a of the first rotor pole 22, are provided. The external fan 11 and the internal fan 34 are used to generate an air flow for cooling a stator core 3, the rotor assembled body 21, an excitation core 31 and an excitation coil 33.
    Type: Application
    Filed: August 9, 2007
    Publication date: December 2, 2010
    Inventor: Hideyuki Hayashi
  • Publication number: 20100295390
    Abstract: A stator (16) is proposed for a polyphase electric machine, having a core body (17), which is provided with slots (114), which are situated in the radial direction with respect to an axis of rotation of the electric machine on one side of the core body (17) parallel to the longitudinal axis of the core body (17), having a slot width (bn1, bn2) and a stator yoke (122) being provided on the opposite side, with two slots (114) each being separated from one another by a tooth (116) having a tooth width (bz1, bz2) and extending from a slot base (120) to a tooth head (118), these slots (114) being provided to receive at least one coil winding having a plurality of coils that is electrically connected in series and are manufactured from at least one continuous wire (124) without interruption, the ratio (bz2/hj) of the tooth width (bz2) to the yoke height (hj) at the tooth head (118) being between 0.3 and 0.
    Type: Application
    Filed: March 30, 2007
    Publication date: November 25, 2010
    Applicant: ROBERT BOSCH GMBH
    Inventors: Eberhard Rau, Alexander Shendl
  • Patent number: 7834493
    Abstract: A vehicle alternator is disclosed as having a rotor including magnetic pole pieces, each having claw-like magnetic pole fingers, a field coil wound on boss portions of the magnetic pole pieces, and cooling fans fixedly mounted on the magnetic pole pieces, respectively. Each cooling fan includes a central disc portion, a plurality of fan base portions formed on the central disc portion, and fan blades standing upright from the fan base portions in an axially outward direction, respectively. The central disc portion has an outer circumferential periphery formed with a plurality of cutout portions to be contiguous with roots of the fan base portions, respectively, and placed in areas radially inward of the fan blades, respectively. Each cutout portion is so placed to be perpendicular to the radial direction on which each claw-like magnetic pole finger is oriented.
    Type: Grant
    Filed: December 29, 2008
    Date of Patent: November 16, 2010
    Assignee: Denso Corporation
    Inventor: Hiroo Kaizu
  • Publication number: 20100283336
    Abstract: The invention concerns a ventilation system for a rotary electrical machine of the type comprising a rotor mounted so as to rotate in a stator and a device for cooling by forced flow of a cooling fluid, such as air, provided with at least one fan fixed to the rotor and an independent fan (10) disposed so as to be decisive for cooling at relatively low speeds of rotation of the rotor. The invention can be used for rotary electrical machines.
    Type: Application
    Filed: September 19, 2006
    Publication date: November 11, 2010
    Inventors: Claudiu Vasilesco, Michel Fakes
  • Publication number: 20100270877
    Abstract: The invention relates to an electric machine tool, particularly an angle grinder, having an electric motor that can be forcibly cooled by a cooling air flow. The electric motor includes an armature and a field iron package disposed concentrically to the armature which are disposed in a cooling air flow. The invention proposes that the armature and the field iron package be disposed in series in the cooling air flow.
    Type: Application
    Filed: October 10, 2008
    Publication date: October 28, 2010
    Inventors: Florian Esenwein, Peter Wassermann
  • Patent number: 7816826
    Abstract: A machine has a rotor, that can be rotated about an axis, with a superconductive winding that is coupled in a heat-conducting manner to a central coolant area of a fixed heat conducting body proturding into a hollow of the rotor via a winding carrier and a heat contact gas. The coolant area forms a line system with the line parts thereof, that are laterally connected thereto, and a condenser area of a cold unit, in which a coolant circulates in the line system as result of a thermosiphon effect. To maintain the supply of coolant to the central coolant area, even when the rotor encounters difficulties, the coolant area is provided with a lining of a porous material, preferably a sinter material, having high thermal conductivity.
    Type: Grant
    Filed: February 1, 2006
    Date of Patent: October 19, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventor: Bernd Gromoll
  • Patent number: 7812482
    Abstract: By reviewing a material of a forcer housing and an assembly structure of a coil member with respect to the forcer housing, a thrust force is increased, an optimum shape can be easily given to the forcer housing depending on a purpose of use, and a linear motor can be manufactured at low cost. The linear motor includes a magnet rod composed of a large number of magnetic poles arranged with predetermined pitches along an axial direction and a forcer having a through-hole into which the magnet rod is loosely inserted and reciprocatable relatively to the magnet rod according to an applied electric signal. The forcer is composed of a forcer housing in which the through-hole is defined and a coil member which is arranged on an inner peripheral surface of the through-hole of the forcer housing and to which the electric signal is applied. The forcer housing is formed by mold forming with an insulating nonmetal inorganic material.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: October 12, 2010
    Assignee: THK Co., Ltd.
    Inventors: Toshiyuki Aso, Taro Miyamoto, Shuhei Yamanaka
  • Publication number: 20100244592
    Abstract: According to an aspect of the present invention, there is provided a power tool including: a housing having a suction port formed thereon to introduce an cooling air from an outside of the housing; and a brushless motor that is housed in the housing and has an electric circuit, the electric circuit having a heat radiating surface, wherein the heat radiating surface is disposed in a neighborhood of the suction port.
    Type: Application
    Filed: June 17, 2008
    Publication date: September 30, 2010
    Applicant: HITACHI KOKI CO. LTD.
    Inventors: Katsuhiro Oomori, Yoshihiro Komuro, Kenichirou Yoshida, Kazutaka Iwata
  • Patent number: 7804208
    Abstract: A high speed electric motor for use in a variety of applications. The electric motor an electric motor including a motor housing or stator, a rotor having a commutator and brushes for contacting the commutator at a predefined area known as the contact area. Additionally, the motor includes a forced air cooling assembly. The forced air cooling assembly includes a centrifugal fan for creating air flow, a manifold for accelerating the air flow. The manifold having exit ports and the exit ports being positioned directly over the contact area for directing the accelerated air flow at the contact area and the motor housing having at least one opening aligned with the contact area and at least a second opening defining an exit vent. Additionally, a method of cooling the motor in accordance with the invention is also disclosed.
    Type: Grant
    Filed: December 14, 2007
    Date of Patent: September 28, 2010
    Inventor: Wing-kin Hui
  • Publication number: 20100225184
    Abstract: A servo motor includes an enclosure defining airflow passages in the outer surface thereof, an end cover attached to the enclosure, a rotor shaft accommodated in the enclosure and having an end protruding out of the end cover, an encoder attached to the protruding end of the rotor shaft, an encoder cover attached to the end cover and covering the encoder, a fan duct covering the end cover, and a fan attached to the fan duct. The end cover, the encoder cover, and the fan duct cooperatively define an airflow space communicating with the airflow passages of the enclosure. The encoder cover includes a guiding portion gradually shrinking toward a small end which is away from the end cover. The fan duct includes a guiding portion gradually shrinking toward an end to which the fan is attached, thereby to guide the airflow smoothly flow toward the fan.
    Type: Application
    Filed: May 19, 2009
    Publication date: September 9, 2010
  • Publication number: 20100213775
    Abstract: A high power density generator includes a rotor assembly, a rectifier assembly, and a cooling assembly configured in such a way so as to provide high electrical output power while retaining a small profile. The rotor assembly includes one or more rings configured to secure the main rotor windings to the main rotor poles by imparting a clamping force therebetween while conforming to the windings' profile allowing for operation at high RPM and high levels of shock and vibration. The rotor assembly may further include a rotating rectifier assembly positioned so as to reduce the moment arm between the mass centers of the rotor assembly and the drive-end bearing. The rectifier assembly comprises a rectifier housing and one or more rectifiers which are placed radially so as to dissipate heat directly into the airstream. The cooling assembly, comprising a fan and a shroud, is placed adjacent to the rectifier assembly providing immediate cooling of the rectifier.
    Type: Application
    Filed: February 24, 2009
    Publication date: August 26, 2010
    Inventor: Majid Naghshineh
  • Publication number: 20100187919
    Abstract: The invention relates to an electric motor with a stator and an external rotor, comprised of a rotor bell and a rotor cover that acts as a fan wheel. The rotor bell has several apertures in its bell floor. The rotor cover has several exhaust ports. The rotor cover is shaped like a plate and consists of a plate base and an annular wall. The exhaust ports are preferably evenly distributed in the annular wall. The inside of the plate base of the rotor cover that faces the rotor bell has several radially extending interior blades that are fixedly connected to it.
    Type: Application
    Filed: January 27, 2010
    Publication date: July 29, 2010
    Inventors: Dieter Best, Matthias Maschke, Erik Reichert, Martin Kurz
  • Publication number: 20100171379
    Abstract: There is provided a vehicle AC generator in which the contact face of at least one of a pair of cases that make contact with the respective axis-direction end faces of a stator core is provided with a cooling air path that connects the outer circumferential surface of a coil end portion with the outer circumferential surface of the stator core and has an opening in the axis direction at the outer circumferential surface of the stator core so that the coolability of the coil end portions of the stator coil is raised, and the amount of cooling air is increased so that the overall coolability of the AC generator is improved.
    Type: Application
    Filed: August 30, 2007
    Publication date: July 8, 2010
    Applicant: Mitsubishi Elkectric Corporation
    Inventors: Shinichi Ito, Shinji Nishimura, Yoshiro Imazawa
  • Publication number: 20100156205
    Abstract: A compact, rugged, variable reluctance, variable speed, electric motor capable of producing high torque at high electrical energy conversion efficiencies is provided. The present invention provides for a multi-stage motor design having a number of discreet rotor and stator elements on a common shaft. This configuration provides for the simplest of magnetic structures and produces a powerful magnetic flux modelling design technique that is used to further optimize the motor design and subsequent control logic. Thermal mapping of the magnetic mass provides for advanced cooling techniques that are used to ensure long in-service life in the most extreme of industrial applications. The electric motor inherently provides low vibration thereby greatly reducing noise; low turn to turn voltage potentials thereby eliminating costly phase to phase shorting potential; efficient motor operation through the reduction in switching and copper losses in both the machine and its control system.
    Type: Application
    Filed: August 22, 2008
    Publication date: June 24, 2010
    Inventors: John A. Davis, Iain C Davis, Feisal A Hurzook
  • Publication number: 20100140952
    Abstract: A cooling system for a wind turbine is provided. The cooling system includes at least one generator having a plurality of external fins disposed around at least a portion of the periphery of the generator. A shroud is disposed around at least a portion of the generator, and is configured to guide air across the external fins so that said air cools the generator.
    Type: Application
    Filed: May 11, 2009
    Publication date: June 10, 2010
    Inventor: Patrick L. Jansen
  • Publication number: 20100141063
    Abstract: A housing for an electric motor, the housing including a substantially cylindrical shaped frame having a first and second opposing ends and a longitudinal axis running between the first and second opposing ends, and a plurality of air flow outlets each having a longitudinal axis, the plurality of air flow outlets being radially disposed about a circumference of the frame such that the longitudinal axis of each of the plurality of air flow outlets is located in a plane that is substantially orthogonal to the longitudinal axis of the frame.
    Type: Application
    Filed: December 9, 2008
    Publication date: June 10, 2010
    Inventors: JonYeon Oh, Michael L. Jones, Tarun Sharma, Shanmugam Venkatachalam Ravi
  • Patent number: 7732955
    Abstract: In accordance with an aspect of the present disclosure, a power tool has an electric motor having a stator disposed in a field case. The stator has field coils having opposed axial ends that extend axially outwardly from opposed axial ends of a lamination stack of the stator. An armature is disposed in the stator and has a shaft on which a fan is disposed. There are gaps between the opposed axial ends of the respective field coils. The fan baffle includes an air direction member that extends into one of the gaps to direct air flow between the armature and the stator. In an aspect, the fan baffle includes a plurality of such members, one for each gap.
    Type: Grant
    Filed: August 18, 2008
    Date of Patent: June 8, 2010
    Assignee: Black & Decker Inc.
    Inventors: Phillip T. Miller, Brian E. Friedman
  • Patent number: 7732950
    Abstract: A radiator for a linear or curved mobile motor for removing the thermal distortion of a mover and a transporting member of a linear or curved mobile motor, and a high-accuracy, high-reliability linear or curved mobile motor using it. The linear or curved mobile motor includes a field pole having a plurality of permanent magnets with different magnetic poles arranged alternately along a field yoke, and an armature arranged opposite to the field pole via a magnetic gap and formed by winding a single or a plurality of coils around a core. The field pole is used as a stator and the armature being used as a mover that is relatively moved along the longitudinal direction of the stator.
    Type: Grant
    Filed: July 25, 2005
    Date of Patent: June 8, 2010
    Assignee: TS Heatronics Co., Ltd.
    Inventors: Tatsuya Yamaoka, Kazuyoshi Suzuki
  • Patent number: 7732953
    Abstract: An electric motor cooling system is provided that includes a housing and first and second cooling sources that are different from one another respectively to provide first and second cooling flows. A stator is mounted in the housing and receives the first cooling flow. A rotor is rotatable relative to the stator and receives the second cooling flow. In the examples, the housing supports a journal bearing upon which the rotor is supported, and the second cooling flows through the journal bearing. The first cooling flow is provided by a low pressure source such as ram air, and the second cooling flow is provided by high pressure source such as bleed air, for example. A circumferential gap is provided between the rotor and stator. In one example, a seal is arranged between the housing and a stator for providing a cavity in fluid communication with the journal bearing and the gap. The cooling flow from the journal bearing passes through the cavity and into the gap for cooling the rotor.
    Type: Grant
    Filed: June 12, 2007
    Date of Patent: June 8, 2010
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Robert Telakowski
  • Publication number: 20100133927
    Abstract: An external rotor for a direct current drive motor with a side wall, an end cover, a cavity, an opening, a base, a magnetic tile, a center hole, and a magnetic yoke shell. A method for producing an external rotor for a direct current drive motor by integrally forming by injection molding a magnetic yoke shell and multiple magnetic tiles; forming a side wall on said magnetic yoke shell and an end cover at the bottom of said side wall; forming a base at the center of said end cover; and integrally forming by injection molding said base and a rotating spline.
    Type: Application
    Filed: May 25, 2009
    Publication date: June 3, 2010
    Inventor: Xu ZHANG
  • Publication number: 20100132968
    Abstract: An electrical tool (1) includes an electric motor (3), a fan wheel (4) that is connected in torque-proof manner to a drive shaft (8) of the electric motor (3) disposed within a housing (2) that includes at least one air inlet aperture (6) and at least one air outlet aperture (7). The at least one air outlet aperture (7) is arranged axially apart from the fan wheel (4) with regard to the axis of rotation (10) of the drive shaft (8). An air guide baffle ring (11) encloses the fan wheel (4) coaxially and has at least one air duct (12) which leads to at least one air outlet aperture (7) located axially at a distance from the fan wheel (4) for cooling the electric tool (1).
    Type: Application
    Filed: November 19, 2009
    Publication date: June 3, 2010
    Inventor: Axel Hartmann
  • Publication number: 20100133933
    Abstract: A cooling arrangement is disclosed for an electrical machine in which the main cooling air circulation within the machine is arranged using a centrifugal blower in at least one of the ends of the machine, making the main cooling air circulation flow through at least an air space in the machine and the outer surface of the stator. A circulating fan is arranged in the immediate vicinity of the centrifugal fan for the purpose of generating a coil end circulation that circulates air at least in the area of the machine's coil ends.
    Type: Application
    Filed: July 13, 2007
    Publication date: June 3, 2010
    Applicant: ABB OY
    Inventors: Jouni Ikäheimo, Jere Kolehmainen, Jari Pekola, Tommi Ryyppö
  • Patent number: 7719146
    Abstract: A power tool 1 includes a cylindrical-shaped yoke 31, magnets 32 provided in the interior of the yoke 31, an armature 41 disposed rotatably in the interior of the yoke 31, a cooling fan 7 rotatably secured to the armature 41, a fan guide 8 disposed on the periphery of the cooling fan 7, and a cylindrical-shaped housing 2 for storing the yoke 31 therein. The fan guide 8 is contacted with the axial-direction one end face of the yoke 31, and the fan guide 8 is engaged with the yoke 31 in the rotation direction thereof.
    Type: Grant
    Filed: January 9, 2007
    Date of Patent: May 18, 2010
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Shigeru Takahashi, Naoki Tadokoro, Takuma Saito
  • Publication number: 20100117466
    Abstract: A device for rectifying the current of a rotary electric machine comprising a bearing (50) with through openings (51) for a coolant, that comprises at least one module (100) including a holder (10, 16) for holding current rectifying members (93, 94) having the same phase as the machine, said holder (10, 16) including a heat sink (16) with vanes (18) at least partially covering an opening (51) in the bearing (50). A rotary electric machine including such a current rectifying device. Application: alternators of automotive vehicles with internal ventilation.
    Type: Application
    Filed: December 20, 2007
    Publication date: May 13, 2010
    Inventors: Olivier Gas, Fabrice Tauvron, Marc Tunzini, Régis Seidenbinder
  • Publication number: 20100117467
    Abstract: An exciter machine including an auxiliary exciter machine and a fan is provided. The fan is arranged on one side of the exciter machine and includes a mount ring on the external circumference on which permanent magnets are arranged in order to form an auxiliary rotor. The auxiliary rotor is moved within an auxiliary exciter stator.
    Type: Application
    Filed: April 18, 2008
    Publication date: May 13, 2010
    Inventors: Günther Hautke, Norman Kühn
  • Patent number: 7710081
    Abstract: An exemplary power system may include an electric machine with multiple sets of stator windings, each set of windings being coupled through a separate switch matrix to a common voltage bus, and each of which may be spatially arranged in full pitch around the stator such that stator flux harmonics are substantially reduced. The reduced stator flux harmonics may be associated with phase current harmonic content. In an example application, such power systems may operate in a generating mode to transfer mechanical energy to electrical energy on a DC voltage bus. In some illustrative embodiments, the power system may provide both high-power and high-speed (e.g., 1 MW at 8000 rpm or above) motoring and/or generating capability suitable, for example, for on-board (e.g., marine, aviation, traction) power systems.
    Type: Grant
    Filed: May 21, 2007
    Date of Patent: May 4, 2010
    Assignee: Direct Drive Systems, Inc.
    Inventors: Daniel M. Saban, Raed H. Ahmad, Zhiguo Pan
  • Publication number: 20100102653
    Abstract: An arrangement for cooling an electrical machine is provided. The electrical machine is connected with a first cooling-system which directly cools the electrical machine. The first cooling-system circulates a first cooling-medium. The first cooling-system is connected with a second cooling-system which delivers heat from the first cooling-system to the second cooling-system. The second cooling-system circulates a second cooling-medium to remove the received heat. The first cooling-system is connected with a third cooling-system, which is a refrigeration-system, to additionally cool down the first cooling-medium of the first cooling-system.
    Type: Application
    Filed: October 27, 2009
    Publication date: April 29, 2010
    Inventor: Soeren Gundtoft
  • Publication number: 20100102654
    Abstract: A cooling unit for a power tool comprises a fan wheel (10) to be supported on an armature shaft (3) of a motor (1) of the power tool. The cooling unit comprises a torque transfer means as well as an actuating means (20, 22) for actuating this torque transfer means so as to selectively transfer the rotation of the armature shaft (3) to the fan wheel (10) during operation of the power tool.
    Type: Application
    Filed: October 13, 2009
    Publication date: April 29, 2010
    Inventors: Michael Lange, Rainer Vogler
  • Patent number: 7705497
    Abstract: A power tool cooling system comprises a cooling fan disposed on a motor in a position between the upper field coil and the lower commutator. A transmission housing encapsulates the transmission mechanism. During operation, the fan is driven by the motor and draws air axially through the motor and expels the air radially outwardly through holes in the outer housing of the motor. This causes air to be drawn in through the air vents formed on the top of a tool housing, in the side of the housing and between the housing and a battery pack. The cool air flows outside of the transmission housing, but inside the tool housing such that air does not pass through the transmission mechanism. A plurality of motor openings are also formed in the outer housing of the motor to enable cool air to pass into the motor to cool the motor.
    Type: Grant
    Filed: December 29, 2005
    Date of Patent: April 27, 2010
    Assignee: Black & Decker Inc.
    Inventors: Klaus-Dieter Arich, Erhard Benner, Manfred Droste, Uwe Nemetz, Martin Soika, Michael Kunz
  • Publication number: 20100090561
    Abstract: A rotor of a rotary electric machine comprising a rotor shaft, a stack of laminations, which is coaxial to the rotor shaft and which comprises at least two radially-projecting poles, a field coil which is wound around each pole, such that the ends of the coil project out axially in relation to each external axial end radial face of the lamination stack and two plates for supporting the lamination stack, which are disposed axially on either side of the stack, housings being provided in the internal radial face of each plate for receiving the coil ends. At least one of the housings comprises a contact surface with the external radial face of the associated coil end.
    Type: Application
    Filed: June 16, 2006
    Publication date: April 15, 2010
    Inventors: Virginie Leroy, Marc Tunzini
  • Patent number: 7685914
    Abstract: A food slicer comprises a fan-cooled electrically powered motor driving a slicer blade. The motor is mounted within an enclosure which comprises at least one air intake port and at least one exhaust port on opposite sides of one nominally air-tight first partitioning wall within the enclosure to confine the flow of cooling air from the air intake port through the enclosure, then into intimate contact with the electrical windings and components within the frame of the motor. The motor frame is sealed into a closely conforming contacting aperture in the first partitioning wall. The fan is mounted immediately adjacent to a non-contacting aperture in a second partitioning wall within the enclosure juxtaposed the exhaust port.
    Type: Grant
    Filed: January 5, 2007
    Date of Patent: March 30, 2010
    Assignee: Edgecraft Corporation
    Inventor: Daniel D. Friel, Sr.
  • Publication number: 20100026107
    Abstract: According to an aspect of the present invention, there is provided a power tool including: a housing; a fan rotatably supported by the housing so as to generate an air flow; a wall portion supported by the housing; and a heat generation portion supported by the wall portion, wherein the wall portion has an exposing hole to expose a part of the heat generation portion so that the exposed part of the heat generation portion is positioned within the air flow.
    Type: Application
    Filed: July 3, 2009
    Publication date: February 4, 2010
    Applicant: Hitachi Kodki Co., Ltd.
    Inventor: Nobuhito Hosokawa
  • Publication number: 20100026112
    Abstract: An electric motor has a stator and a rotor. The stator has a housing with inlets and outlets. The rotor has a shaft, a rotor core and a commutator. A fan is fixed to the rotor. An end cap is fitted to the housing to close a first end of the housing and support electrical components, including brush gear. The brush gear includes two brush assemblies, each comprising a brush for making sliding electrical contact with the commutator and a brush guidance mechanism for resiliently urging the brush into contact with the commutator. The brush assemblies are accommodated in compartments of the end cap. Each compartment has vents on an axially facing side thereof and openings in a transverse wall thereof. An air guide guides a part of the airflow generated by the fan exiting from at least one of the outlets of the housing to flow into the compartments via the openings and exit the compartments via the vents to cool the brushes.
    Type: Application
    Filed: August 4, 2009
    Publication date: February 4, 2010
    Inventors: Wen Liang LI, Ji Dong Chai, Bao Ting Liu
  • Publication number: 20100026108
    Abstract: A motor that includes a motor portion structured to house a stator and a rotor mounted to a shaft of the motor. The motor additionally includes a cooling portion disposed adjacent to the motor portion and separated from the motor portion by a structural interface. The cooling portion provides a cooling chamber structured to have a cooling fluid passed therethrough via a cooling fluid moving device that is structured to be coupled to and driven by the motor shaft. Furthermore, the motor includes a plurality of heat pipes having evaporator ends disposed within the motor portion and condenser ends disposed within the cooling chamber. During operation of the motor and cooling fluid moving device, the cooling fluid contacts the heat pipe condenser ends to extract heat from the condenser ends, hence cooling the evaporator ends of the heat pipes, thereby cooling the motor portion of the motor and the stator and rotor housed therein.
    Type: Application
    Filed: July 31, 2009
    Publication date: February 4, 2010
    Inventors: Timothy Hassett, Mark Hodowanec
  • Patent number: 7651325
    Abstract: In a vacuum cleaner blower (1) consisting of an electric drive motor (2) and a support cage (10) for receiving the structural modules of the drive motor such as stator pack (6), rotor (7) and brush holders (8) including carbon brushes (9) as well as an at least single stage blower unit driven by the motor including a deflector (11), impeller (12) and suction hood (4), the deflector being formed as a support cage lid including a bearing seat for the rotor (7) and the support cage (10) being formed for a mounting direction (C) of its structural modules in the axial direction of the blower and for direct contacting and the brush holder (8) of the carbon brushes being provided adjacent to the upper side (B) of the support cage which also faces the deflector (11).
    Type: Grant
    Filed: October 27, 1999
    Date of Patent: January 26, 2010
    Assignee: Miele & Cie. KG
    Inventors: Guenter Esch, Peter Rode, Hans-Joachim Hegemann
  • Patent number: 7646118
    Abstract: A portable power working machine includes a drive unit disposed in a motor housing connected to a proximal end of an operating arm. The drive unit rotates a cutting blade at a distal end of the operating arm. The motor housing has an inlet and an outlet for cooling air in front and rear sections, respectively. The drive unit includes an electric motor disposed near the front end of the motor housing, a cooling fan disposed near the rear end of the motor housing and connected to an output shaft of the electric motor, and a heat sink disposed between the cooling fan and the electric motor so as to extend from the electric motor. The cooling air drawn in through the inlet by the cooling fan is guided through a gap between the drive unit and an inner surface of the motor housing and is discharged through the outlet.
    Type: Grant
    Filed: October 1, 2007
    Date of Patent: January 12, 2010
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Kenichi Yoshida, Hideki Tomiyama, Masanobu Yoshimura, Toshiyuki Suzuki
  • Publication number: 20090289513
    Abstract: A cooling system is provided for an electric motor having control circuitry and including a motor housing surrounding the motor. The motor drives at least one radial fan at one end thereof for directing airflow through the motor housing across the motor. A fan housing encloses the cooling fan and defines a diverter chamber radially outboard of the fan that is sized to divert a portion of the airflow away from the electric motor. A control box contains the control circuitry and includes a base having a heat sink for contacting the control circuitry. The base defines a plenum in communication with the diverter chamber and a channel in communication with the plenum and the heat sink to direct the diverted airflow across the heat sink.
    Type: Application
    Filed: May 21, 2008
    Publication date: November 26, 2009
    Inventors: Jose L. Vadillo, Raymond D. Heilman, Donald E. Morgan