Patents Assigned to Maxon Motor AG
  • Patent number: 10634707
    Abstract: The present disclosure relates to a method for determining the position of a rotor of a polyphase motor, e.g., the rotor angle, particularly at standstill. The method can include: applying voltage to phases of the motor, measuring a current in the phases, and determining the rotor position based on the measured current. According to the present disclosure, determination of the rotor position can be based on current values measured during a period where zero voltage is applied to the respective phases.
    Type: Grant
    Filed: August 4, 2014
    Date of Patent: April 28, 2020
    Assignee: MAXON MOTOR AG
    Inventors: Jean-Sebastien Mariethoz, Oliver Schultes, Marko Tanaskovic, Damian Frick
  • Patent number: 10018096
    Abstract: The present disclosure relates to a method of monitoring an electric motor serving to drive a pump, wherein, within a time interval T, current values are measured, an average value of the current values measured is determined and this average value is compared to a predetermined reference value. According to the disclosure, it is provided that the method extends to controlling the electric motor, wherein the current values measured reflect the profile of the winding current of the electric motor and, irrespective of whether they can be associated with an instantaneous maximum value of the current profile, are included in determining the average value, and wherein the average value is considered by the motor control as input parameter.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: July 10, 2018
    Assignee: MAXON MOTOR AG
    Inventors: Hugo Wallimann, Ludwin Anton
  • Patent number: 9765866
    Abstract: A backlash-free spindle nut is disclosed with a thread that can be meshed with a spindle. The spindle nut has a first nut part with a first internal thread and a second nut part with a second internal thread that can be twisted in relation to the first nut part. To generate a preload between the first nut part and the second nut part, the spindle nut has an elastic element. The preload can be adjusted through relative twisting between the first nut part and the second nut part. The elastic element can work between the first nut part and a secure intermediate part, whereby relative twisting between the first nut part and the second nut part can be locked by locking a relative twisting position between the second nut part and the intermediate part.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: September 19, 2017
    Assignee: MAXON MOTOR AG
    Inventor: Peter Samsfort
  • Patent number: 9680347
    Abstract: The invention relates to an electric motor/gear mechanism unit including a housing, an iron-free rotor winding rotatably arranged in the interior of the housing, a collector connected to the rotor winding, a rotor shaft extending through the collector, and a gear mechanism which is connected to the rotor shaft and which has an output shaft. The present invention is so conceived that the gear mechanism is produced from a non-magnetic material and arranged in the interior of the rotor winding.
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: June 13, 2017
    Assignee: MAXON MOTOR AG
    Inventors: Daniel Sherwin, Albert Hugo Fritschy, Franzxaver Fölmli, Jens Oliver Schulze, Raniero Pittini, Dirk Zimmermann
  • Patent number: 9669896
    Abstract: The present invention provides a sensor arrangement. The signal from the sensor is used to control an auxiliary motor of a vehicle propelled by muscular strength. The auxiliary motor is there integrated into a wheel hub unit of the vehicle. The wheel hub unit comprises a stationary axle and a hub rotatably mounted to the axle. According to the invention, the assembly comprises the sensor and a freewheel of the drive train, which is propelled by muscular strength, mounted rotatable relative to the axle, where the sensor is arranged such that it detects a rotational motion of the freewheel relative to the axle.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: June 6, 2017
    Assignee: MAXON MOTOR AG
    Inventors: Chen Zhao, Franz-Xaver Folmli, Max Erick Busse-Grawitz, Mathis Trachsel
  • Patent number: 9660495
    Abstract: A stator for an electric motor for use at very high temperatures of up to 550° C. is provided, comprising a stator winding with an axis and with several winding wire ends which are passed out at a front end of the stator winding. The stator further comprises a stator winding interconnection with several ring conductors which are arranged at the front end of the stator winding coaxially to same and are axially spaced apart from each other. The ring conductors serve the electrical contacting of the winding wire ends. It is provided that an electrically insulating distance ring is respectively provided between axially successive ring conductors, wherein the ring conductors and the distance rings are alternately stacked.
    Type: Grant
    Filed: March 23, 2014
    Date of Patent: May 23, 2017
    Assignee: MAXON MOTOR AG
    Inventors: Yaaqub Brzuska, Kornelia Kunstmann, Pia Aschwanden, Tobias Hänni, Bernd Hage, Bernd Fürderer
  • Patent number: 9570963
    Abstract: The present invention relates to a brush cover for a brush-commutated electric motor. The brush cover comprises at least one lever brush which is mounted rotatably about an axis at the brush cover by means of a bolt. According to the invention, the bolt is surrounded, at least in sections, by at least one damping sleeve of an elastomer.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: February 14, 2017
    Assignee: MAXON MOTOR AG
    Inventors: Arnold Teimel, Reto Walker, Dirk Uhlich
  • Patent number: 9509187
    Abstract: Exemplary embodiments relate to a hollow-cylindrical coreless winding for an electric motor. The winding includes a plurality of single coils which are distributed across the circumference of the winding, wherein each single coil includes a plurality of turns which are spirally wound around a winding axis which is perpendicular to an axis of the winding. Successive single coils overlap in a roof tile manner. The winding includes at least two phase windings, each of the phase windings consisting of several ones of the single coils. The phase windings are offset with respect to each other in the circumferential direction of the hollow-cylindrical winding, so that the single coils of a first phase winding are disposed in the circumferential direction of the hollow-cylindrical winding between the single coils of a second phase winding. Each of the phase windings is wound from a continuous wire.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: November 29, 2016
    Assignee: MAXON MOTOR AG
    Inventors: Franz-Xaver Fölmli, Jens Schulze, Raniero Pittini
  • Patent number: 9500265
    Abstract: The present invention relates to a linear drive with a stator, a runner, and two rotative drive units provided for driving the runner. It is provided according to the invention that the linear drive comprises two magnetorheological clutches, wherein the first drive unit can be coupled to the runner using a first magnetorheological clutch and the second drive unit can be coupled to the runner using a second magnetorheological clutch. The output torque of the first drive unit acts upon the runner in the opposite direction to the output torque of the second drive unit.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: November 22, 2016
    Assignee: Maxon Motor AG
    Inventors: Raniero Pittini, Max Erick Busse-Grawitz, Mathieu Roulet, Dominique Martin, Rene Waldvogel
  • Publication number: 20160138638
    Abstract: The present invention relates to a screw assembly with a threaded spindle and a spindle nut. The spindle nut comprises at least one threaded portion made of sintered material with an internal thread. The internal thread engages in an external thread of the threaded spindle. It is according to the invention provided that the internal thread and the external thread are configured as steep threads.
    Type: Application
    Filed: November 12, 2015
    Publication date: May 19, 2016
    Applicant: MAXON MOTOR AG
    Inventors: Darko LUKIC, Olaf KLEIN
  • Publication number: 20160137259
    Abstract: The present invention provides a sensor arrangement. The signal from the sensor is used to control an auxiliary motor of a vehicle propelled by muscular strength. The auxiliary motor is there integrated into a wheel hub unit of the vehicle. The wheel hub unit comprises a stationary axle and a hub rotatably mounted to the axle. According to the invention, the assembly comprises the sensor and a freewheel of the drive train, which is propelled by muscular strength, mounted rotatable relative to the axle, where the sensor is arranged such that it detects a rotational motion of the freewheel relative to the axle.
    Type: Application
    Filed: November 13, 2015
    Publication date: May 19, 2016
    Applicant: MAXON MOTOR AG
    Inventors: Chen ZHAO, Franz-Xaver FOLMLI, Max Erick BUSSE-GRAWITZ, Mathis TRACHSEL
  • Publication number: 20160126796
    Abstract: An electric direct current motor is disclosed which includes a shaft, a winding support, a collector having several collector wires, and an air-cored outer rotor winding with several winding terminations. The outer rotor winding is at one end connected to the shaft via the winding support in a torque-proof manner, and is electrically connected with the collector. The winding support can be replaced by a printed circuit board as a bearing component of glass-fiber reinforced thermosetting plastics, wherein the printed circuit board includes at least one layer and is connected to the shaft via a metal hub.
    Type: Application
    Filed: January 12, 2016
    Publication date: May 5, 2016
    Applicant: Maxon Motor AG
    Inventors: Arnold TEIMEL, Yves TRIPONEZ, Peter MITTERBACK
  • Patent number: 9308965
    Abstract: The invention relates to an electric wheel hub drive for a vehicle, in particular a bicycle. The wheel hub drive comprises a hub housing that is pivot-mounted about an axis and a brushless electric motor coaxially arranged with regard to the axis and including a rotor and a stator for driving the hub housing. The rotor of the electric motor includes at least one permanent magnet. According to the invention, the stator includes an ironless stator winding.
    Type: Grant
    Filed: August 24, 2012
    Date of Patent: April 12, 2016
    Assignee: MAXON MOTOR AG
    Inventors: Franz-Xaver Fölmli, Mathis Trachsel, David Ramon, Hugo Fritschy, Raniero Pittini
  • Publication number: 20160072415
    Abstract: The present disclosure relates to a method of monitoring an electric motor serving to drive a pump, wherein, within a time interval T, current values are measured, an average value of the current values measured is determined and this average value is compared to a predetermined reference value. According to the disclosure, it is provided that the method extends to controlling the electric motor, wherein the current values measured reflect the profile of the winding current of the electric motor and, irrespective of whether they can be associated with an instantaneous maximum value of the current profile, are included in determining the average value, and wherein the average value is considered by the motor control as input parameter.
    Type: Application
    Filed: September 10, 2015
    Publication date: March 10, 2016
    Applicant: MAXON MOTOR AG
    Inventors: Hugo WALLIMANN, Ludwin ANTON
  • Patent number: 9172282
    Abstract: An electric motor with an add-on unit, such as a gearbox unit, encoder unit or controller unit, and disclosed whereby the electric motor and add-on unit can be firmly connected to each other. For a firm connection, a shrink ring is thermally shrunk on to the electric motor and add-on unit in the area of the joint so that the shrink ring covers the joint. A method is also disclosed for producing the connection, wherein a temperature difference is first created between the shrink ring on the one hand and the electric motor as well as add-on unit on the other hand, whereby furthermore the temperature of the shrink ring is greater than the temperature of the electric motor and add-on unit and whereby the components are then joined together and held so that the shrink ring shrinks on to the electric motor and add-on unit.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: October 27, 2015
    Assignee: MAXON MOTOR AG
    Inventors: Tsuneo Suzuki, Joachim Neumann, Wolfgang Stricker, Dominik Frey
  • Patent number: 9157483
    Abstract: A method of connecting a hub component and a connection between a shaft and a hub component, in particular a pinion connected to a shaft. The hub component and the shaft are formed of different materials, that is of ceramics and metal. A connecting element of metal is connected both to the hub component and to the shaft. The hub component and the shaft are connected to the connecting element by a material bond.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: October 13, 2015
    Assignee: MAXON MOTOR AG
    Inventors: Thorsten Buurlage, Michael Reith
  • Publication number: 20150268283
    Abstract: The present disclosure relates to a method for determining the position of a rotor of a polyphase motor, e.g., the rotor angle, particularly at standstill. The method can include: applying voltage to phases of the motor, measuring a current in the phases, and determining the rotor position based on the measured current. According to the present disclosure, determination of the rotor position can be based on current values measured during a period where zero voltage is applied to the respective phases.
    Type: Application
    Filed: August 4, 2014
    Publication date: September 24, 2015
    Applicant: MAXON MOTOR AG
    Inventors: Jean-Sebastien MARIETHOZ, Oliver Schultes, Marko Tanaskovic, Damian Frick
  • Publication number: 20150219149
    Abstract: The present invention relates to a bearing assembly for an electric motor, in particular for a small electric motor. It comprises an axially preloaded ball bearing with an inner race and an outer race. The bearing assembly further comprises an axial stop, a spring element disposed between the axial stop and the inner or outer race, respectively, for generating the axial preload, and a thrust washer made of metal and disposed between the spring element and the inner or outer race. It is provided according to the invention that the thrust washer is coated on both sides with a layer increasing static friction.
    Type: Application
    Filed: January 28, 2015
    Publication date: August 6, 2015
    Applicant: MAXON MOTOR AG
    Inventor: Arnold TEIMEL
  • Publication number: 20150198223
    Abstract: A backlash-free spindle nut is disclosed with a thread that can be meshed with a spindle. The spindle nut has a first nut part with a first internal thread and a second nut part with a second internal thread that can be twisted in relation to the first nut part. To generate a preload between the first nut part and the second nut part, the spindle nut has an elastic element. The preload can be adjusted through relative twisting between the first nut part and the second nut part. The elastic element can work between the first nut part and a secure intermediate part, whereby relative twisting between the first nut part and the second nut part can be locked by locking a relative twisting position between the second nut part and the intermediate part.
    Type: Application
    Filed: January 14, 2015
    Publication date: July 16, 2015
    Applicant: MAXON MOTOR AG
    Inventor: Peter SAMSFORT
  • Patent number: 9033849
    Abstract: The invention relates to a backlash-free planetary gear unit with a sun gear and with a ring gear, which mesh with at least one first planet gear of a planetary stage, wherein the planetary stage comprises a first planet carrier on which the first planet gear is rotatably mounted, wherein there is furthermore at least one second planet gear in the planetary stage that also meshes with the ring gear and the sun gear, wherein the at least one second planet gear is rotatably supported at a second planet carrier of the planetary stage, wherein the two planet carriers are in the circumferential direction of the sun gear preloaded relative to each another such that also the at least one first planet gear is preloaded relative to the at least one second planet gear in the circumferential direction of the sun gear.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: May 19, 2015
    Assignee: MAXON MOTOR AG
    Inventors: Olaf Klein, Stefan Westholt