Patents by Inventor Alexander Shendi
Alexander Shendi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20150364957Abstract: The invention relates to an electric machine (10) comprising a stator (16) that has a stator core (17). Said core has a substantially cylindrical opening (60) having a central axis (63), and the opening (60) accommodates a rotor (20). The stator core (17) has an axial length (L17a) and said core (17) holds a stator winding (18) together with the rotor (20) which has a rotational axis (66). The rotor (20) has an axial end face (69), on which a fan (30) with fan blades (72) is located and is non-rotatably connected to the rotor (20). The rotor (20) has an electromagnetically excitable path (75) having a pole shank (78), a respective pole plate (22, 23) adjoining each axially rotational end (80, 82) of said shank. Claw poles (24) having a north polarity extend from one pole plate (22) and claw poles (25) having a south polarity extend from the other pole plate (23), said claw poles (24) and (25) alternating between north and south polarities around the periphery of the rotor (20).Type: ApplicationFiled: December 18, 2013Publication date: December 17, 2015Inventors: Alexander Shendi, Gerlinde Weber, Gert Wolf
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Publication number: 20150333599Abstract: The invention relates to an electric machine (10) comprising a stator (16) that has a stator core (17). Said core has a substantially cylindrical opening (60) having a central axis (63), an internal diameter (D17i) and an external diameter (D17a) and the opening (60) accommodates a rotor (20). The stator core (17) has an axial length (L17a) and said core (17) holds a stator winding (18) together with the rotor (20) which has a rotational axis (66). The rotor (20) has an axial end face (69), on which a fan (30) with fan blades (72) is located and is non-rotatably connected to the rotor (20). The rotor (20) has an electromagnetically excitable path (75) having a pole shank (78), a respective pole plate (22, 23) adjoining each axially rotational end (80, 82) of said shank.Type: ApplicationFiled: December 18, 2013Publication date: November 19, 2015Inventors: Gert Wolf, Gerlinde Weber, Alexander Shendi
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Patent number: 8878413Abstract: An alternating-current generator, in particular a three-phase generator, for a motor vehicle, having a rotor including north and south poles, particularly having claw-pole fingers extending in the axial direction and alternating as north and south poles at the rotor's periphery, a stator having a magnetic core, especially laminated core, having slots and a stator winding disposed in the magnetic core's slots, the stator winding having winding overhangs that are coolable by an approximately radial air flow produced by at least one fan mounted at the rotor, the stator being situated opposite the rotor, and the stator and the rotor having defined positions relative to each other, the multiphase stator winding being made up of winding elements, at least one winding element having more than two sections inserted in slots, and at least one winding element having more than one reversal section which brings about a change in the radial position.Type: GrantFiled: January 2, 2008Date of Patent: November 4, 2014Assignee: Robert Bosch GmbHInventors: Gert Wolf, Thomas Berger, Eberhard Rau, Alexander Shendi, Helmut Kreuzer, Christoph Schwarzkopf
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Patent number: 8368276Abstract: A polyphase electrical machine, in particular, a polyphase generator, includes a stator which features a core body having a circumferential slot pitch, and a winding configuration having a plurality of windings. It is provided that each winding and each slot of the group of slots that extends over one pole pitch is assigned to one of the phases, and the windings have winding sections that lie in assigned slots and between which, in each case, a winding-head connection is formed, the winding-head connections of different windings being disposed radially in layers relative to each other, and the number of phases being five. A method for producing a polyphase electrical machine is also provided.Type: GrantFiled: January 29, 2008Date of Patent: February 5, 2013Assignee: Robert Bosch GmbHInventors: Gert Wolf, Norbert Pfitzke, Thomas Berger, Eberhard Rau, Alexander Shendi
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Patent number: 8354770Abstract: An alternator for motor vehicles, having a rotor, whose poles are developed as claw-poles. In order to improve the design options of the stator of the machine, its multiphase winding is developed as a fractional-slot winding, whereby, in particular with respect to the selection of the number of slots, many additional options are created, by which both the production is made clearly simpler and less costly and, at the same time, the electrical properties are able to be improved.Type: GrantFiled: June 4, 2007Date of Patent: January 15, 2013Assignee: Robert Bosch GmbHInventors: Gert Wolf, Alexander Shendi, Kurt Reutlinger
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Patent number: 8344580Abstract: 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: GrantFiled: March 30, 2007Date of Patent: January 1, 2013Assignee: Robert Bosch GmbHInventors: Eberhard Rau, Alexander Shendi
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Publication number: 20120281446Abstract: In a method for reducing load dump overvoltages during operation of a synchronous rectifier for a polyphase alternating current having a number of inputs which correspond to the number of alternating current phases of the alternating current, and having at least two outputs for providing a direct current, an alternating current phase is connected to each of the inputs, and each of the inputs are electrically optionally connected via active switching elements to either the first or the second output in accordance with a control unit.Type: ApplicationFiled: November 17, 2010Publication date: November 8, 2012Inventors: Fabio Magini, Paul Mehringer, Alexander Shendi, Andeas Windmueller, Ralf Herbig
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Patent number: 8008833Abstract: A stator for an electrical machine, in particular a rotary current generator, is proposed, in which the stator (36) is made by the flat-packet technique and comprises at least one stator iron (10) and a stator winding (30), and the stator iron (10) has a substantially annular-cylindrical shape, and the stator iron (10) has an axial direction (a) which is oriented in the direction of a cylinder axis, and the stator iron (10) has an end face, oriented in the direction of the cylinder axis and defining a slot area (ANut), and a ratio (A) formed of the slot area (ANut) and the end face area amounts to between 0.4 and 0.8.Type: GrantFiled: December 14, 2004Date of Patent: August 30, 2011Assignee: Robert Bosch GmbHInventor: Alexander Shendi
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Publication number: 20110043059Abstract: An alternating-current generator, in particular a three-phase generator, for a motor vehicle, having a rotor including north and south poles, particularly having claw-pole fingers extending in the axial direction and alternating as north and south poles at the rotor's periphery, a stator having a magnetic core, especially laminated core, having slots and a stator winding disposed in the magnetic core's slots, the stator winding having winding overhangs that are coolable by an approximately radial air flow produced by at least one fan mounted at the rotor, the stator being situated opposite the rotor, and the stator and the rotor having defined positions relative to each other, the multiphase stator winding being made up of winding elements, at least one winding element having more than two sections inserted in slots, and at least one winding element having more than one reversal section which brings about a change in the radial position.Type: ApplicationFiled: January 2, 2008Publication date: February 24, 2011Inventors: Gert wolf, Thomas Berger, Eberhard RAU, Alexander Shendi, Helmut Kreuzer, Christoph Schwarzkopf
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Publication number: 20100283349Abstract: A polyphase electrical machine, in particular, a polyphase generator, includes a stator which features a core body having a circumferential slot pitch, and a winding configuration having a plurality of windings. It is provided that each winding and each slot of the group of slots that extends over one pole pitch is assigned to one of the phases, and the windings have winding sections that lie in assigned slots and between which, in each case, a winding-head connection is formed, the winding-head connections of different windings being disposed radially in layers relative to each other, and the number of phases being five. A method for producing a polyphase electrical machine is also provided.Type: ApplicationFiled: January 29, 2008Publication date: November 11, 2010Inventors: Gert Wolf, Norbert Pfitzke, Thomas Berger, Eberhard Rau, Alexander Shendi
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Publication number: 20100156230Abstract: An alternator for motor vehicles, having a rotor, whose poles are developed as claw-poles. In order to improve the design options of the stator of the machine, its multiphase winding is developed as a fractional-slot winding, whereby, in particular with respect to the selection of the number of slots, many additional options are created, by which both the production is made clearly simpler and less costly and, at the same time, the electrical properties are able to be improved.Type: ApplicationFiled: June 4, 2007Publication date: June 24, 2010Inventors: Gert Wolf, Alexander Shendi, Kurt Reutlinger
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Publication number: 20070216253Abstract: A stator for an electrical machine, in particular a rotary current generator, is proposed, in which the stator (36) is made by the flat-packet technique and comprises at least one stator iron (10) and a stator winding (30), and the stator iron (10) has a substantially annular-cylindrical shape, and the stator iron (10) has an axial direction (a) which is oriented in the direction of a cylinder axis, and the stator iron (10) has an end face, oriented in the direction of the cylinder axis and defining a slot area (ANut), and a ratio (A) formed of the slot area (ANut) and the end face area amounts to between 0.4 and 0.8.Type: ApplicationFiled: December 14, 2004Publication date: September 20, 2007Applicant: ROBERT BOSCH GMBHInventor: Alexander Shendi
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Patent number: 6867530Abstract: Electrical machine, in particular an alternator for a motor vehicle, with a housing (4) and a rotor (10) that is supported, in the housing (4), in a manner that allows it to rotate around a rotation axis (12), the rotor having at least one rotor winding (14), a plurality of claw poles (17) disposed circumferentially, whereby adjacent claw poles (17) have axial claw overlap LÜ and permanent magnets (28) have axial magnet length LM, whereby at least one permanent magnet (28) is located between every two adjacent claw poles (17) and is magnetized so as to suppress leakage flux between the claw poles (17), wherein the following applies for the ratio of axial magnet length LM to axial claw overlap LÜ: LM/LÜ?0.81.Type: GrantFiled: December 18, 2001Date of Patent: March 15, 2005Assignee: Robert Bosch GmbHInventors: Oliver Gamm, Falko Winter, Alexander Shendi, Hans-Peter Groeter, Jerome Debard
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Publication number: 20040119357Abstract: Electrical machine, in particular an alternator for a motor vehicle, with a housing (4) and a rotor (10) that is supported, in the housing (4), in a manner that allows it to rotate around a rotation axis (12), the rotor having at least one rotor winding (14), a plurality of claw poles (17) disposed circumferentially, whereby adjacent claw poles (17) have axial claw overlap LÜ and permanent magnets (28) have axial magnet length LM, whereby at least one permanent magnet (28) is located between every two adjacent claw poles (17) and is magnetized so as to suppress leakage flux between the claw poles (17), wherein the following applies for the ratio of axial magnet length LM to axial claw overlap LÜ:LM/LÜ≧0.81.Type: ApplicationFiled: January 22, 2004Publication date: June 24, 2004Inventors: Oliver Gamm, Falko Winter, Alexander Shendi, Hans-Peter Groeter, Jerome Debard
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Patent number: 6548935Abstract: An electric machine is proposed, in particular a generator for a motor vehicle, having an excitation system comprised of a number of electrically excited individual poles in the stator or rotor. The stator (40) or rotor (39) is embodied in the form of electromagnetically excited poles (37, 38) which are oriented axially along the circumference and whose polarity alternates in the circumferential direction, in which permanent magnets (43) are inserted into intermediary spaces (42) between the alternating poles (37, 38) in order to reduce the magnetic leakage flux.Type: GrantFiled: August 13, 2001Date of Patent: April 15, 2003Assignee: Robert Bosch GmbHInventors: Alexander Shendi, Jérome Debard, Sylvian Briand
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Patent number: 6333581Abstract: The electrical machine, in particular a three-phase generator, has a stator (21) secured in a housing (10) and a claw pole rotor (23) which is secured on a shaft (13) and has an exciter winding (28). Between the claw pole rotor and a bearing plate (17) that closes off the housing, there is an electrical repeater (29) for exciting the exciter winding (28). The primary winding (30) is disposed along with the core (36, 41, 47) on the bearing plate (17). The primary and secondary windings (30, 31) of the repeater (29) are disposed between the bearing plate (17) and the claw pole rotor system (23); the primary winding (30) is disposed in a stationary core (36, 41, 47), and the secondary winding (31) is disposed in a rotating core (35, 42, 48), and the windings are coupled via an air gap (38).Type: GrantFiled: May 31, 2000Date of Patent: December 25, 2001Assignee: Robert Bosch GmbHInventors: Walter Kohl, Istvan Ragaly, Alexander Shendi, Hans-Peter Groeter
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Patent number: 6013967Abstract: A synchronous machine, in particular a generator for a vehicle, has an excitation system with a plurality of electrically excited individual poles in a rotor, preferably in form of claw poles excited by at least one common excitation coil, in which for compensation of a magnetic stray flux, in the free spaces between the axially oriented claw poles permanent magnets are inserted at the axial ends of the pole plates of the rotor, so that the permanent magnets are supported by a holder against centrifugal forces and held by it, and therefore an especially simple and inexpensive holder is formed which considerably simplifies and facilitates the insertion of the permanent magnets.Type: GrantFiled: January 26, 1999Date of Patent: January 11, 2000Assignee: Robert Bosch GmbHInventors: Istvan Ragaly, Juergen Lechner, Alexander Shendi, Hans-Peter Groeter, Sylvain Briand, Alan Syrop
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Patent number: 6013968Abstract: A synchronous machine, in particular a generator for a motor vehicle, has an excitation system with a plurality of electrically excited individual poles in a rotor, preferably in form of claw poles which are excited by at least one common excitation coil, wherein for compensation of a magnetic stray flux, permanent magnets are inserted in free spaces between the axially oriented claw poles on the pole plates mounted on the axial ends of the rotors, and the permanent magnets are supported by a holder against centrifugal forces, so that the insertion of the permanent magnets is simplified and facilitated by a simple and inexpensive holder which reduces parts and mounting expenses.Type: GrantFiled: January 26, 1999Date of Patent: January 11, 2000Assignee: Robert Bosch GmbHInventors: Juergen Lechner, Alexander Shendi, Sylvan Briand