US20130057096A1 - Power transmission device for electric vehicle - Google Patents

Power transmission device for electric vehicle Download PDF

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Publication number
US20130057096A1
US20130057096A1 US13/697,663 US201113697663A US2013057096A1 US 20130057096 A1 US20130057096 A1 US 20130057096A1 US 201113697663 A US201113697663 A US 201113697663A US 2013057096 A1 US2013057096 A1 US 2013057096A1
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United States
Prior art keywords
shaft
power transmission
transmission device
gear
gear set
Prior art date
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Abandoned
Application number
US13/697,663
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English (en)
Inventor
Tomohiro Okada
Naoaki Oikawa
Takahiro Saruwatari
Tatsuhiko Ikeda
Ken Nakayama
Kazuhiko Soeda
Akinori Inada
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Nissan Motor Co Ltd
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Nissan Motor Co Ltd
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Application filed by Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Assigned to NISSAN MOTOR CO., LTD. reassignment NISSAN MOTOR CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: IKEDA, TATSUHIKO, INADA, AKINORI, SOEDA, KAZUHIKO, OIKAWA, NAOAKI, SARUWATARI, TAKAHIRO, NAKAYAMA, KEN, OKADA, TOMOHIRO
Publication of US20130057096A1 publication Critical patent/US20130057096A1/en
Abandoned legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/40—Structural association with grounding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B60L15/2054—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed by controlling transmissions or clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
    • F16H3/08—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts
    • F16H3/087—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears
    • F16H3/091—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears including a single countershaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H02K11/33—Drive circuits, e.g. power electronics
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2270/00—Problem solutions or means not otherwise provided for
    • B60L2270/10—Emission reduction
    • B60L2270/14—Emission reduction of noise
    • B60L2270/147—Emission reduction of noise electro magnetic [EMI]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02034—Gearboxes combined or connected with electric machines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02039—Gearboxes for particular applications
    • F16H2057/02043—Gearboxes for particular applications for vehicle transmissions
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

Definitions

  • the present invention relates to power transmission devices applicable to electric vehicles with measures for preventing radiation of high-frequency noise.
  • an inverter for controlling the motor generates high-frequency noise (or referred to as “radio noise”) and a motor drive system including a power transmissions, suspensions and such can be antennas to radiate the high-frequency noise, which cause negative effect on radio reception.
  • the following document discloses a related art, which proposes having a brush in electrical contact with an output shaft of a motor and grounding the brush via a vehicle body.
  • the present inventors have further studied noise propagation in the vehicle body and have found out that an electric resistance at the brush is not sufficiently low and therefore the noise can flow beyond a part with which the brush contacts. To reduce noise propagation, it is promising to reduce the resistance at the brush. However, reduction in electric resistance at the brush is not readily achieved.
  • An object of the present invention is to provide a power transmission device applicable to electric vehicles, which suppresses noise propagation from an inverter through a power transmission to drive shafts and suspensions, thereby reducing noise radiation to the exterior.
  • a power transmission device for a vehicle is comprised of a motor including a rotor shaft and a stator having an electro-magnetic coil; an inverter configured to generate an alternating current, the inverter being connected with the coil to controllably rotate the rotor shaft relative to the stator; a gear set including an input shaft coupled with and rotated by the rotor shaft, an output shaft and gears so meshed as to transmit torque of the input shaft to the output shaft; and a grounding path electrically connecting a part of the gear set with a body of the vehicle, the part being so disposed as to have the input shaft electrically interposed between the part and the rotor shaft.
  • FIG. 1 is a schematic view of an electric vehicle with a power transmission device according to a first embodiment of the present invention, which in particular shows a relation among the power transmission device, wheels and the ground.
  • FIG. 2 is an enlarged cross sectional view of the power transmission device around brushes.
  • FIG. 3 is a schematic drawing of an electric vehicle without measures for high-frequency noise, which schematically shows propagation pathways of the noise.
  • FIG. 4 is a schematic drawing of an equivalent circuit with respect to the electric vehicle with the power transmission device according to the first embodiment.
  • FIG. 5A demonstrates noise suppression when the electric vehicle runs at 5 km/h.
  • FIG. 5B demonstrates noise suppression when the electric vehicle runs at 40 km/h.
  • FIG. 6 is a schematic view of an electric vehicle with a power transmission device according to a second embodiment of the present invention.
  • FIG. 7 is a schematic view of an electric vehicle with a power transmission device according to a third embodiment of the present invention.
  • FIG. 8A shows a planetary gear used in the power transmission device according to the third embodiment.
  • FIG. 8B shows revolutions of respective gear members of the planetary gear.
  • FIG. 9 is a schematic view of a resistor and related members according to a modified embodiment.
  • FIG. 1 a power transmission device for an electric vehicle according to a first embodiment of the present invention will be described.
  • the power transmission device of the first embodiment is comprised of a motor 1 , an inverter 2 , a first gear set 3 including a plurality of couplings and meshing parts 4 functioning as resistors, and a grounding path 5 .
  • the motor 1 is comprised of a motor housing 1 a, a rotor shaft 1 b rotatably supported by the motor housing 1 a, a rotor 1 c drivingly coupled with the rotor shaft 1 b, and stators 1 e fixed to the motor housing 1 a.
  • Each stator 1 e has an electric coil 1 d coiled therearound.
  • the rotor 1 c is accordingly comprised of a plurality of permanent magnets, thereby being rotated by a magnetic field generated by the coils 1 d.
  • any permanent magnet synchronous motor may be applied to the motor 1 .
  • the inverter 2 is connected with the motor coils 1 d of the motor 1 via a three-phase power cable 6 , and is in turn connected with a secondary battery 7 via a power cable 8 .
  • the inverter 2 includes switching devices to convert direct current supplied by the battery 7 into alternating current and further convert alternating current from the motor 1 into direct current.
  • the inverter 2 generates alternating current to drive the motor 1 when the vehicle gathers speed, and further regenerates electric power out of the kinetic energy of the vehicle when the vehicle decelerates.
  • the first gear set 3 is a reduction gear set and intervenes between a rotor shaft 1 b and output shafts 3 d respectively coupled with wheels 9 , thereby transmitting torque from the rotor shaft 1 b to the output shafts 3 d with reducing its speed.
  • the first gear set 3 may be a speed-up gear set or an isokinetic gear set.
  • the first gear set 3 includes a combination of shafts and gears, all of which are in general carried by a gear casing 3 a.
  • the shafts include an input shaft 3 b drivingly coupled with and rotated by the rotor shaft 1 b, a counter shaft 3 c, and output shafts 3 d for driving wheels 9 in general.
  • the gears include an input gear 3 e on the shaft 3 b, a first counter gear 3 f on the shaft 3 c meshing with the input gear 3 e, a second counter gear 3 g also on the shaft 3 c, and a drive gear 3 h on the output shafts 3 d meshing with the second counter gear 3 g.
  • a differential gear 3 i intervenes between the drive gear 3 h and the output shafts 3 d.
  • the gears are so meshed as to transmit torque of the input shaft 3 b to the output shafts 3 d.
  • the gear set 3 may be comprised of a smaller or greater number of shafts and gears.
  • the gear set 3 includes a plurality of meshing parts, namely a meshing part 4 d at which the gear 3 e meshes with the gear 3 f, and a meshing part 4 e at which the gear 3 g meshes with the gear 3 h.
  • These meshing parts 4 d and 4 e inherently have considerably greater electric resistances than those of the shafts and gears, thereby functioning as resistors.
  • gear set 3 may further have a spline coupling 4 a for coupling with the rotor shaft 1 b, and output couplings 4 b, 4 c for respectively coupling with drive shafts 3 d′, these couplings 4 a, 4 b, 4 c also function as resistors.
  • the grounding path 5 includes one or more brushes 5 a, one or more lead lines 5 e and a connection line 5 b.
  • the brushes 5 a are kept in slidable contact with, and are therefore electrically connected with, an end portion 3 c′ of the counter shaft 3 c.
  • the lead lines 5 e are electrically connected with both the brushes 5 a and the gear casing 3 a.
  • the connection line 5 b establishes electric connection of the gear casing 3 a with a body 10 of the vehicle.
  • the brushes 5 a, the lead lines 5 e and the connection line 5 b in combination with the gear casing 3 a constitute the grounding path 5 for electrically grounding a part of the first gear set 3 .
  • left and right suspensions 11 are further illustrated.
  • the counter shaft 3 c is rotatably supported by the gear casing 3 a with having a ball bearing 13 interposed therebetween.
  • the counter shaft 3 c is, within a gear chamber 3 j inside the casing 3 a, splined to drivingly engage with the first counter gear 3 f.
  • an oil seal 14 is provided at an opposite side relative to the bearing 13 so as to seal oil within the casing 3 a.
  • Any anti-displacement means such as a snap ring 15 is secured to the end portion 3 c′ of the counter shaft 3 c.
  • the end portion 3 c′ is preferably further elongated outward, where the brushes 5 a, preferably provided in pair, are kept in contact with the counter shaft 3 c.
  • a cover 16 is attached to the casing 3 a so as to cover the brushes 5 a and the end portion 3 c′.
  • the cover 16 and the gear casing 3 a enclose a brush chamber 17 and the cover 16 is preferably comprised of a breather connector 12 to assure air ventilation.
  • a brush case 5 c of an electrically non-conductive material is secured to the gear casing 3 a by means of an elongated portion 3 a′ of the casing 3 a with a securing means such as a bolt.
  • a securing means such as a bolt.
  • Each brush 5 a along with a compressed spring 5 d is housed in the brush case 5 c and is thus urged toward the end portion 3 c′ of the counter shaft 3 c.
  • the lead lines 5 e connected with the brushes 5 a are led out of the brush case 5 c and are electrically connected with the gear casing 3 a.
  • an inverter for controlling a motor generates high-frequency noise and a motor drive system including a power transmission system and suspensions can be antennas to radiate the high-frequency noise, which causes negative effect on radio reception.
  • FIG. 3 schematically illustrates such noise radiation.
  • An inverter includes switching devices which repeat turn on and off current flow, thereby generating alternating current. Each time the switching devices turn on current flow, sharp rising edges occur in the current flow and in turn cause high-frequency noise.
  • the high-frequency noise flows through a power cable PC and a motor coil MC to a rotor shaft MS of a motor M. Without any measure for high-frequency noise, the noise further flows through an input gear IG, a counter shaft CS, a differential gear DG and drive shafts DS to suspensions S of the vehicle.
  • V 2 ⁇ ZB/ ( ZB+ZR ) ⁇ V 1 ⁇ (1)
  • V 1 represents a voltage of the noise present at the rotor shaft 1 b
  • ZR represents a resistance present between the shaft 1 b and the connection point CP
  • ZB represents a resistance through the brush toward the ground.
  • both increase in the resistance ZR and decrease in the resistance ZB are effective in suppression of the voltage V 2 at the connection point CP, which leads to suppression of noise radiation as described above.
  • a brush contacts with a rotor shaft as with the art disclosed in the PTL 1, substantially there is not a resistive element between the rotor shaft 1 b and the connection point CP.
  • the resistance ZR is relatively low and the resistance ZB is relatively high.
  • a considerable amount of noise may flow beyond the connection point CP toward the drive shaft DS, where the noise is radiated.
  • the coupling 4 a and the meshing part 4 d are electrically interposed between the rotor shaft 1 b and the part where the grounded brushes 5 a electrically contacts with the counter shaft 3 c.
  • the coupling 4 a and the meshing part 4 d have considerably high resistance as described earlier.
  • the resistance ZR is made relatively high, thereby reducing the noise voltage V 2 and suppressing the noise current flowing beyond the connection point CP.
  • the brushes 5 a may be disposed in any location in the first gear set 3 as far as one or more electrically resistive elements are electrically interposed between the rotor shaft 1 b and a part where the grounded brushes 5 a electrically contacts with the first gear set 3 .
  • resistive elements meshing parts between any meshing gears, couplings, and any resistor connected in series in a shaft or a gear can be exemplified. This structure effectively suppresses noise radiation.
  • FIGS. 5A and 5B Each figure compares three cases of; (A) the rotor shaft 1 b is grounded at a location A shown in FIG. 1 ; (B) the input shaft 3 b is grounded at a location B; and (C) the counter shaft 3 c is grounded at a location C (the present embodiment).
  • FIG. 5A shows cases where a vehicle runs at 5 km/h
  • FIG. 5B shows case where a vehicle runs at 40 km/h.
  • Each axis of ordinate represents radiated noise intensities measured in decibels relative to a standard intensity.
  • FIGS. 5A and 5 b illustrate that the case (A) (the rotor shaft 1 b is grounded) provides the greatest noise intensities.
  • the case (B) (the input shaft 3 b is grounded) as compared with the case (A), the noise intensities are suppressed.
  • the case (C) (the counter shaft 3 c is grounded), the noise intensities are further suppressed.
  • the present embodiment further provides the following effects.
  • the oil seal 14 intervenes between the gear chamber 3 j in which lubricant oil circulates and the brush chamber 17 which houses the brushes 5 a, thereby separating these chambers.
  • the oil does not ill-affect electrical continuity between the brushes 5 a and the counter shaft 3 c, and further fragments rubbed off from the brushes 5 a or the counter shaft 3 c do not ill-affect lubrication in the gear chamber 3 j.
  • the reduction gear with three shafts is used.
  • FIG. 6 illustrates a second embodiment in which an electric vehicle includes a second gear set 23 of a reduction gear set with four shafts.
  • the second gear set 23 intervenes between a rotor shaft 1 b and output shafts 23 e coupled with wheels 9 , thereby transmitting torque from the rotor shaft 1 b to the output shafts 23 e with reducing its speed.
  • the second gear set 23 includes a combination of shafts and meshing gears, all of which are in general carried by a gear casing 23 a.
  • the shafts include an input shaft 23 b drivingly coupled with and rotated by the rotor shaft 1 b, a first counter shaft 23 c, a second counter shaft 23 d and output shafts 23 e for driving wheels 9 in general.
  • the gears include an input gear 23 f on the input shaft 23 b, first counter gears 23 g, 23 h on the first counter shaft 23 c, one of which meshes with the input gear 23 f, second counter gears 23 i, 23 j on the second counter shaft 23 d, one of which meshes with the first counter gear 23 h, and a drive gear 23 h on the output shafts 23 e meshing with the second counter gear 23 j.
  • a differential gear 23 m intervenes between the drive gear 3 h and the output shafts 23 e.
  • the gears are so meshed as to transmit torque of the input shaft 23 b to the output shafts 23 e.
  • the gear set 23 may be comprised of a smaller or greater number of shafts and gears.
  • the gear set 23 includes a spline coupling 4 a, meshing parts 4 d, 4 e, 4 f where gears 23 f, 23 g, 23 h, 23 i, 23 j, 23 k mesh with each other, and output couplings 4 b, 4 c, all of which are electrically resistive.
  • a grounding path 5 includes one or more brushes 5 a in slidable contact with an end portion 23 d′ of the second counter shaft 23 d.
  • the brushes 5 a are grounded through the gear casing 3 a and the connection line 5 b, thereby grounding the second counter shaft 23 d.
  • location of the brushes 5 a may be modified so as to electrically ground any other shaft 23 b, 23 c or 23 e.
  • the second embodiment provides the same effects as those of the first embodiment.
  • FIG. 7 illustrates a third embodiment in which a gear set 33 with planetary gearing is used.
  • the power transmission device of the third embodiment is comprised of a motor 1 , an inverter 2 , the gear set 33 including electrically resistive elements 4 , and a grounding path 5 .
  • a motor 1 a motor 1 , an inverter 2 , the gear set 33 including electrically resistive elements 4 , and a grounding path 5 .
  • the gear set 33 intervenes between a rotor shaft 1 b of the motor 1 and output shafts 33 d, thereby transmitting torque from the rotor shaft 1 b to the output shafts 33 d.
  • the gear set 33 includes a combination of shafts and meshing gears, all of which are in general carried by a gear casing 33 a.
  • the shafts include an input shaft 33 b, a cylindrical shaft 33 c coaxial with the input shaft 33 b and an output shaft 33 d.
  • the gears include a planetary gear set of a single pinion type, which is comprised of a sun gear 33 e, pinions 33 f meshing with and revolving about the sun gear 33 e, a ring gear 33 g meshing with the pinions 33 f, and an output gear 33 h for output.
  • a pinion carrier 33 k holds the pinions 33 f and the cylindrical shaft 33 c is secured thereto.
  • the gear set 33 further includes a differential gear having a drive gear 33 i meshing with the output gear 33 h.
  • the ring gear 33 g is secured to gear casing 33 a by means of a connection member 5 f as shown in FIGS. 7 and 8A . Therefore, when the sun gear 33 e rotates, the pinions 33 f along with the pinion carrier 33 k revolves with reduced revolution relative to the sun gear 33 e on the basis of the stationary ring gear 33 g as shown in FIG. 8B . Thus torque with reduced speed is output to the output gear 33 h and further transmitted to the output shafts 33 d via the differential gear.
  • connection member 5 f also establishes electric connection between the ring gear 33 g and the gear casing 33 a.
  • a connection line 5 b electrically connects the gear casing 33 a with the body 10 of the vehicle.
  • connection member 5 f, the gear casing 33 a and the connection line 5 b constitute the grounding path 5 for electrically grounding the ring gear 33 f.
  • Both a meshing part 4 d between the gears 33 e and 33 f and a meshing part 4 f between the gears 33 h and 33 i are electrically resistive.
  • the gear set 3 may further have a spline coupling 4 a for coupling with the rotor shaft 1 b and output couplings 4 b, 4 c for respectively coupling with wheel shafts 3 d′, the couplings 4 a, 4 b, 4 c are also resistive.
  • connection member 5 f is electrically connected with the ring gear 33 g, at least the meshing parts 4 d, 4 e and the coupling 4 a, as electrically resistive elements, are interposed between the rotor shaft 1 b and the connection member 5 f.
  • the resistance ZR in its equivalent circuit shown in FIG. 4 is made relatively higher. Therefore the noise voltage V 2 is reduced as described above and then noise radiation is suppressed.
  • FIG. 9 illustrates one of such modifications.
  • a resistor R is connected in series in the input shaft 33 b.
  • the resistor R increases an electric resistance on the line of the input shaft 33 b and the counter shaft CS interposed between brushes B and a rotor shaft (not shown), noise flowing toward the drive shaft DS is suppressed.
  • Location of the resistor R may be alternatively changed.
  • any means other than the brushes 5 a and the connection member 5 f may be alternatively used as far as one or more electrically resistive elements are electrically interposed between the motor and the means.
  • teachings as described above can be also applied to continuously variable transmissions. Further the teachings can be also applied to so-called hybrid vehicles, fuel cell vehicles, or any other vehicles where noise radiation is concerned.
  • a power transmission device applicable to electric vehicles which suppresses noise propagation from an inverter through a power transmission device to drive shafts and suspensions, thereby reducing noise radiation to the exterior.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Motor Or Generator Frames (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Motor Power Transmission Devices (AREA)
  • General Details Of Gearings (AREA)
US13/697,663 2010-05-27 2011-05-26 Power transmission device for electric vehicle Abandoned US20130057096A1 (en)

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JP2010121145A JP5585211B2 (ja) 2010-05-27 2010-05-27 電動車両用動力伝達装置
JP2010121145 2010-05-27
PCT/JP2011/002945 WO2011148642A1 (en) 2010-05-27 2011-05-26 Power transmission device for electric vehicle

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US15/372,818 Continuation US11031851B2 (en) 2010-05-27 2016-12-08 Gear system for electric vehicle

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EP (1) EP2576271B1 (ja)
JP (2) JP5585211B2 (ja)
KR (3) KR20150038694A (ja)
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BR (1) BR112012030189B1 (ja)
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Publication number Priority date Publication date Assignee Title
US9337567B2 (en) 2014-03-31 2016-05-10 Lear Corporation Seal for an electric terminal
DE102014225236A1 (de) * 2014-12-09 2016-06-09 Robert Bosch Gmbh Elektrische Maschine mit einer Potentialausgleichsvorrichtung
FR3098360A1 (fr) 2019-07-04 2021-01-08 Renault S.A.S Dispositif de fixation d’un balai antiparasite sur un carter et reducteur de vitesse
DE102020104844A1 (de) 2020-02-25 2021-08-26 Schaeffler Technologies AG & Co. KG Elektrische Antriebsanordnung für ein Fahrzeug mit getriebeseitiger Ableiteinrichtung
DE102020106613A1 (de) 2020-03-11 2021-09-16 Schaeffler Technologies AG & Co. KG Elektromechanische Antriebsvorrichtung
US11784531B2 (en) 2021-02-25 2023-10-10 Nidec Corporation Motor having an electrical discharging device and cover member
US11990817B2 (en) 2021-06-30 2024-05-21 Nidec Corporation Motor and drive device

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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DE102012213920A1 (de) * 2012-08-06 2014-02-06 Voith Patent Gmbh Getriebebaueinheit und Antriebseinheit mit einer Getriebebaueinheit
DE102012219819A1 (de) * 2012-10-30 2014-04-30 Voith Patent Gmbh Getriebebaueinheit und Antriebsstrang mit einer Getriebebaueinheit
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KR101526750B1 (ko) * 2013-12-18 2015-06-05 현대자동차주식회사 모터 노이즈 제거 장치
CN107110331A (zh) * 2014-12-26 2017-08-29 夏普株式会社 齿轮结构体和伺服电机
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Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2896732A (en) * 1957-04-16 1959-07-28 Ferodo Sa Devices for suppressing parasitic currents in vehicles with electromagnetic clutches
US5021725A (en) * 1988-11-29 1991-06-04 Hitachi, Ltd. Circuit arrangement for preventing inductive interference in an electric car
JP2000244180A (ja) * 1999-02-22 2000-09-08 Toyota Motor Corp 電気自動車の電磁ノイズ抑制装置
JP2000310296A (ja) * 1999-04-23 2000-11-07 Aisin Aw Co Ltd 電気自動車用駆動装置
US20050256631A1 (en) * 2004-05-14 2005-11-17 Cawthorne William R Method of determining engine output power in a hybrid electric vehicle
US20060138880A1 (en) * 2004-12-28 2006-06-29 Denso Corporation Position detecting apparatus having electric motor and method for detecting position
US20060289248A1 (en) * 2005-06-22 2006-12-28 Mando Corporation Electric parking brake system
JP2007288840A (ja) * 2006-04-12 2007-11-01 Toyota Motor Corp ブラシ付きモータ
US20090121568A1 (en) * 2007-11-09 2009-05-14 Continental Automotive Systems Us, Inc. Motor assembly for window lift applications
US20090230791A1 (en) * 2005-09-29 2009-09-17 Zf Friedrichshafen Ag Drive unit having optimized cooling
US20090237905A1 (en) * 2008-03-19 2009-09-24 Hitachi, Ltd. Motor Drive Apparatus
US20100102643A1 (en) * 2007-06-28 2010-04-29 Siemens Aktiengesellschaft Rail Vehicle With a Wagon Body and Method for Protective Grounding of Such a Wagon Body

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5804903A (en) * 1993-10-22 1998-09-08 Fisher; Rodney R. Motor shaft discharge device
DE9416334U1 (de) 1994-10-11 1995-05-18 Mattke GmbH, 79108 Freiburg Kontaktmittel für rotierende Wellen
JP3549068B2 (ja) 1995-04-19 2004-08-04 本田技研工業株式会社 電動自動車用減速機
JP4036083B2 (ja) 2002-11-15 2008-01-23 日産自動車株式会社 電気自動車用動力伝達装置
CN2690210Y (zh) * 2003-08-11 2005-04-06 北京嘉捷源技术开发有限公司 用于电动客车的行星齿轮减速传动器
JP2006320129A (ja) 2005-05-13 2006-11-24 Nissan Motor Co Ltd 車両用モータ駆動装置
DE102005045960A1 (de) * 2005-09-26 2007-04-05 Siemens Ag Elektrische Rotationsmaschine
JP2007166722A (ja) * 2005-12-12 2007-06-28 Hitachi Ltd 機電一体型回転電機装置及び車両駆動装置
RU2294297C1 (ru) * 2005-12-30 2007-02-27 Закрытое акционерное общество "Рубин" Ходовая часть рельсового транспортного средства
JP2008099473A (ja) 2006-10-13 2008-04-24 Mitsubishi Electric Corp 回転電機
US20080088187A1 (en) * 2006-10-17 2008-04-17 Hitachi, Ltd Electric Motor with Reduced EMI
US7772731B2 (en) * 2007-03-16 2010-08-10 Keihin Corporation Electric motor, rotary actuator and rotary apparatus
US8189317B2 (en) * 2007-04-23 2012-05-29 Illinois Tool Works Inc. Grounding brush system for mitigating electrical current on rotating shafts
JP2009029326A (ja) * 2007-07-30 2009-02-12 Toyota Motor Corp 車両
US8010060B2 (en) 2007-08-29 2011-08-30 GM Global Technology Operations LLC Apparatus and method for reducing stray RF signal noise in an electrically powered vehicle
JP5629428B2 (ja) * 2008-11-17 2014-11-19 東洋製罐グループホールディングス株式会社 金属超微粒子形成用脂肪酸金属塩
JP4483978B2 (ja) * 2008-05-14 2010-06-16 株式会社デンソー 車両用回転電機
JP5248212B2 (ja) * 2008-06-03 2013-07-31 本田技研工業株式会社 レゾルバを備えた電動機
JP5585211B2 (ja) 2010-05-27 2014-09-10 日産自動車株式会社 電動車両用動力伝達装置

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2896732A (en) * 1957-04-16 1959-07-28 Ferodo Sa Devices for suppressing parasitic currents in vehicles with electromagnetic clutches
US5021725A (en) * 1988-11-29 1991-06-04 Hitachi, Ltd. Circuit arrangement for preventing inductive interference in an electric car
JP2000244180A (ja) * 1999-02-22 2000-09-08 Toyota Motor Corp 電気自動車の電磁ノイズ抑制装置
JP2000310296A (ja) * 1999-04-23 2000-11-07 Aisin Aw Co Ltd 電気自動車用駆動装置
US20050256631A1 (en) * 2004-05-14 2005-11-17 Cawthorne William R Method of determining engine output power in a hybrid electric vehicle
US20060138880A1 (en) * 2004-12-28 2006-06-29 Denso Corporation Position detecting apparatus having electric motor and method for detecting position
US20060289248A1 (en) * 2005-06-22 2006-12-28 Mando Corporation Electric parking brake system
US20090230791A1 (en) * 2005-09-29 2009-09-17 Zf Friedrichshafen Ag Drive unit having optimized cooling
JP2007288840A (ja) * 2006-04-12 2007-11-01 Toyota Motor Corp ブラシ付きモータ
US20100102643A1 (en) * 2007-06-28 2010-04-29 Siemens Aktiengesellschaft Rail Vehicle With a Wagon Body and Method for Protective Grounding of Such a Wagon Body
US20090121568A1 (en) * 2007-11-09 2009-05-14 Continental Automotive Systems Us, Inc. Motor assembly for window lift applications
US20090237905A1 (en) * 2008-03-19 2009-09-24 Hitachi, Ltd. Motor Drive Apparatus

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
MORI et al. (JP 2007288840 A)(11-2007)English Translation *
Nomura (JP 2000310296 A) English Translation. *
Nomura et al. (JP 2000310296 A) English Translation *
Takashi (JP 2000244180 A) English Translation. *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9337567B2 (en) 2014-03-31 2016-05-10 Lear Corporation Seal for an electric terminal
DE102014225236A1 (de) * 2014-12-09 2016-06-09 Robert Bosch Gmbh Elektrische Maschine mit einer Potentialausgleichsvorrichtung
US10090739B2 (en) 2014-12-09 2018-10-02 Robert Bosch Gmbh Electric machine having a potential equalization device
FR3098360A1 (fr) 2019-07-04 2021-01-08 Renault S.A.S Dispositif de fixation d’un balai antiparasite sur un carter et reducteur de vitesse
DE102020104844A1 (de) 2020-02-25 2021-08-26 Schaeffler Technologies AG & Co. KG Elektrische Antriebsanordnung für ein Fahrzeug mit getriebeseitiger Ableiteinrichtung
DE102020106613A1 (de) 2020-03-11 2021-09-16 Schaeffler Technologies AG & Co. KG Elektromechanische Antriebsvorrichtung
US11784531B2 (en) 2021-02-25 2023-10-10 Nidec Corporation Motor having an electrical discharging device and cover member
US11990817B2 (en) 2021-06-30 2024-05-21 Nidec Corporation Motor and drive device

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RU2531988C2 (ru) 2014-10-27
JP2014147293A (ja) 2014-08-14
CN102917905A (zh) 2013-02-06
EP2576271B1 (en) 2020-12-02
JP2011250583A (ja) 2011-12-08
KR20130032328A (ko) 2013-04-01
EP2576271A4 (en) 2018-02-21
JP5943033B2 (ja) 2016-06-29
JP5585211B2 (ja) 2014-09-10
US11031851B2 (en) 2021-06-08
MX2012012825A (es) 2012-11-30
KR20150038694A (ko) 2015-04-08
BR112012030189B1 (pt) 2021-01-12
EP2576271A1 (en) 2013-04-10
RU2012157280A (ru) 2014-07-10
MY172941A (en) 2019-12-16
WO2011148642A1 (en) 2011-12-01
KR20170021366A (ko) 2017-02-27
CN102917905B (zh) 2015-05-20
BR112012030189A2 (pt) 2017-10-24
US20170126105A1 (en) 2017-05-04

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