WO2013182964A2 - Systèmes et procédés de transmission mécanique pour des moteurs électriques - Google Patents

Systèmes et procédés de transmission mécanique pour des moteurs électriques Download PDF

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Publication number
WO2013182964A2
WO2013182964A2 PCT/IB2013/054552 IB2013054552W WO2013182964A2 WO 2013182964 A2 WO2013182964 A2 WO 2013182964A2 IB 2013054552 W IB2013054552 W IB 2013054552W WO 2013182964 A2 WO2013182964 A2 WO 2013182964A2
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
output shaft
gearwheel
mechanical transmission
coupled
Prior art date
Application number
PCT/IB2013/054552
Other languages
English (en)
Other versions
WO2013182964A3 (fr
Inventor
Lior MOSHE
Alexey KOUZNETSKY
Original Assignee
Revolt (2012) Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Revolt (2012) Ltd filed Critical Revolt (2012) Ltd
Publication of WO2013182964A2 publication Critical patent/WO2013182964A2/fr
Publication of WO2013182964A3 publication Critical patent/WO2013182964A3/fr

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Classifications

    • 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
    • H02K7/1004—Structural association with clutches, brakes, gears, pulleys or mechanical starters with pulleys
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator
    • H02K16/005—Machines with only rotors, e.g. counter-rotating rotors
    • 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
    • H02K7/102—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
    • 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

Definitions

  • the present invention relates to motorized mechanisms field. Particularly the present invention relates to systems and methods of mechanical transmission for electric motors, to be used in motorized systems.
  • Electric motors are used in many applications. Although an electric motor may have a range of operational speeds and produced torque, gears are often used for matching both motor's speed and torque to the requirements of the load. For example, for load requirements, which are not constant (such as in electrical vehicle which needs to operate at wide range of speeds and ground topographies) - a gear with several transmission ratios is frequently being used.
  • a sprag clutch is a one-way freewheel clutch. It resembles a roller bearing, but instead of cylindrical rollers - non-revolving asymmetric figure-of-eight shaped sprags are being used. When the unit rotates in one direction - the rollers are free to rotate; and when a torque is applied in the opposite direction - the rollers tilt slightly, producing a wedging action and binding, due to friction.
  • a conventional electric motor consist of a central part (termed 'rotor'), and an outer part (termed 'stator').
  • the rotor is rotating, in relation to the stator.
  • the stator is fixed and the rotor is allowed to rotate, and by that - driving the load.
  • both parts are allowed to rotate (both are driving the load) exist.
  • “Brushless counter-rotating electric apparatus and system” discloses a brushless counter- rotating electric apparatus, motor, wheel hub motor, and associated vehicle includes a brushless counter-rotating electric motor that has oppositely rotating armature and stator components, oppositely rotating armature and stator output drives and, when associated with a vehicle, a control assembly for speed-on/off control of the motor and a portable electric power supply.
  • an enhanced counter-rotating electric motor and an associate propulsion system for use with a water-vehicle includes a motor housing, a stator within the housing that rotates about a central axis in one direction, an armature within the stator that rotates about the central axis in an opposite direction from the stator, a first axel that is secured to the stator and extends out from the housing, a second axel that is secured to the armature and extends out from the housing, water-tight rotational seals about each of the two axels, a centrifugal- force-balancing electrical connection mechanism that supplies functioning electrical communication between the motor and external electrical circuitry while operating the motor, and a propeller secured to each said axel.
  • the transmission assembly comprises a primary driven shaft carrying a pulley and a hollow, secondary, driven shaft coaxial with the primary driven shaft.
  • a drive gear is carried by the primary driven shaft.
  • An idler gear is driven by the drive gear and a driven gear, carried by the secondary driven shaft, is driven by the idler gear to effect rotation of the secondary driven shaft in a direction opposite to the direction of rotation of the primary driven shaft.
  • All gear wheels or pulleys are engaged at all time - no engaging and disengaging gear wheels, which can contribute to the following: (a) reducing wear of parts (such as grinding of gear wheel's teeth), (b) allowing smoother gear shifting while in motion, since only small low-inertia components need to be accelerated when gear is shifted;
  • the invention may be used, for example, in electrical bicycles, scooters and other 'light' transportation which require two speed gearing and do not require two directional rotations. Other applications may include more gears and/or bidirectional motion of the load.
  • the suggested mechanism may use in electrical vehicles, toys and may be used in industrial applications as well.
  • Bidirectional rotation can be achieved by creating connection between the part, where the one way bearing is, and the output shaft. That can be done by using a freecoaster mechanism.
  • a freecoaster ensures one-way motion transfer from the motor to the output shaft, with no influence from the output shaft back to the motor.
  • FIG 1A is an isometric view of an embodiment of the mechanical transmission of the invention, integrated with an electric motor;
  • FIG 1 B is a cross-sectional view of an embodiment of the mechanical transmission of the invention, integrated with an electric motor
  • FIG 1 C is a schematic cross-sectional view of an embodiment of the mechanical transmission of the invention, in an activated conformation
  • FIG 1 D is a schematic cross-sectional view of an embodiment of the mechanical transmission of the invention, in a deactivated conformation
  • FIG 2A is a schematic isometric view of another embodiment of the mechanical transmission of the invention, integrated with an electric motor, in a deactivated conformation;
  • FIG 2B is a schematic isometric view of another embodiment of the mechanical transmission of the invention, integrated with an electric motor, in an activated conformation;
  • FIG 3A is a schematic isometric view of yet another embodiment of the mechanical transmission of the invention, integrated with an electric motor, in an activated conformation;
  • FIG 3B is a schematic isometric view of yet another embodiment of the mechanical transmission of the invention, integrated with an electric motor, in an deactivated conformation;
  • FIG 4 is a schematic cross-sectional view of still another embodiment of the mechanical transmission of the invention, integrated with an electric motor.
  • the present invention relates to an efficient and compact combination of mechanical transmission and a counter rotating electric motor, which may be used in vehicles, toys and other industrial and general applications.
  • FIG 1A to 1 D showing assembly 10 of mechanical transmission gear T and a counter rotating electric motor M, according to a first embodiment of the current invention.
  • a frame to which the parts of assembly 10 are housed has not been shown for the sake of clarity; it should be understood that bearings 18 rest on such a frame (not shown) as well as brushes 17 and the various parts of brake 24.
  • Electric motor M of assembly 10 comprises two counter-rotating rotors 11 and 13.
  • Electric motor M used may be of any type of electric motor such as brushed DC, AC motor, stepper motor, brushless motor, etc. Both fixed speed and variable speed motors may be used.
  • An electrical motor typically consists of two main parts, the external part is fixed and is called 'stator' whereas the central part is rotating and is called'rotor'. In current invention, both parts are allowed to rotate, thereby they are referred to as “rotorl " 11 and "rotor2" 13.
  • rotorl 11 comprises a central shaft and an outer shall.
  • Slip-rings 16 conduct electric power via brushes 17 to electric motor M.
  • the number of slip-rings 16 and brushes depends 17 on the number of electric connections that motor M requires, which depends on the type of motor M, such as AC 2- phase, AC 3-phase, DC, etc.
  • three slip-rings are seen 16, disposed on insulating cover 15, each in contact with one brush 17.
  • more brushes 17 may be used per single slip-ring 16.
  • Some or even all brushes 17 are optionally speared if rotorl and/or rotor2 are used for conducting electricity to the motor.
  • an inductive power transmission T may be used.
  • both rotorl 11 and rotor2 13 are capable of rotating, in opposite directions, unless one of them (rotor2 13 in our given example) is affixed, for instance by a brake locking.
  • disk brake 22 is shown, however other types of affixing mechanisms may be used.
  • the brake may be activated manually or for instance by solenoid.
  • Operation of assembly 10 is optionally performed in fast gear.
  • brake 24 is in an activated conformation and locks brake disc 22. Because brake 24 is activated, brake disc 22 is locked and rotor2 13 is stationary, as depicted in FIG 1C by the "X" marks. Accordingly, gear wheel 14 the rotation of which is coupled to rotation of rotor2 13 is stationary too.
  • Torque of rotorl 11 marked by arrow 26 is transferred from rotorl 11 to pulleyl 19A. From pulleyl 19A the torque is transferred to belt 21, as indicated by arrow 27.
  • assembly 10 Operation of assembly 10 is optionally performed in slow gear.
  • brake 24 is in a deactivated conformation. Since brake 24 is deactivated, brake disc 22 is free and rotor2 13 rotates in an opposite direction to rotorl 11.
  • the relative rotation speed between rotorl 11 and rotor2 13 depends on the electrical power supplied to motor M. Since rotor2 13 is now counter rotating, the rotation speed of rotorl 11 relatively to the frame (not shown) is reduced. Therefore, both rotor2 13 and gearwheel 14, which is engaged with rotor2 13, are rotating in opposite directions, as marked by upward pointing arrow 32 on rotor2 13 and downward pointing arrow 34 on gearwheel 14. Sprag 20 in gearwheel is locked now, thus gearwheel 14 rotates together with output shaft 12.
  • the rotational torque is transferred to output shaft 12 concomitantly from both rotorl 11 and rotor2 13 in the following manner. From rotorl 11 to pulleyl 19A, in the direction of arrow 26; from pulleyl 19A by belt 21, in the direction of arrow 27; from belt 21 to pulley2 19B, in the direction of arrow 28, which results in rotation 36 of output shaft 12. Concomitantly the rotational torque of rotor2 13 indicated by arrows 32 is transferred from rotor2 13 to gearwheel 14 indicated by arrows 34. The rotational torque of 14 indicated by arrows 34 is transferred through sprag 20, which also results in rotation 36 of output shaft 12.
  • the gearing ratio of rotation 36 of output shaft 12 depends on the relative dimensions of both pulleyl 19A and pulley2 19B, as well as the relative dimensions of rotor2 13 and gearwheel 14. Supposing pulleyl 19A and pulley2 19B create a gear ratio R1 , whereas rotor2 13 and gearwheel 14 create the same gear ratio R1. Then in fast gear, the gearing ratio is R1 , whereas in slow gear, the gearing ratio is 1 ⁇ 2 R1. Nevertheless, other ratios are also possible.
  • FIG 2A and 2B showing assembly 40 of mechanical transmission gear T and a counter rotating electric motor M, according to a second embodiment of the current invention.
  • Assembly 40 shown FIG 2A and 2B differs from the first embodiment in that combination of pulleyl , pulley2 and the belt is replaced with a combination of gearwheel2 14B, gearwheel3 14C and gearwheel4 14D.
  • Gearwheel2 14B is coupled to rotorl 11, whereas gearwheel4 14D is attached to the output shaft 12.
  • Gearwheel3 14C is disposed on interim shaft 42.
  • FIG 3A and 3B showing assembly 50 of mechanical transmission gear T and a counter rotating electric motor M, according to a third embodiment of the current invention.
  • Assembly 50 operable in a fast gear, shown in FIG 3B.
  • conical gearwheeH 14A and conical gearwheel2 14B both engaged with conical gearwheel3 14C and rotate gearwheel3 14C in opposite directions, as marked by the upward pointing arrow 26 on conical gearwheel2 14B and by downward pointing arrow 34 on conical gearwheeH 14A, while sprag 20 in gearwheeH 14A is locked.
  • the rotational torque is transferred to the output shaft (not shown) coupled to conical gearwheel3 14C from both rotorl 11 and rotor2 13 in the following manner. From rotorl 11 to conicalgear wheel2 14B, from conical gearwheel2 14B to conical gearwheel3 14C, which is connected to the output shaft (not shown). Additionally from the other side, from rotor2 13, trough sprag 20, to conical gearwheeH 14A, from conical gearwheeH 14A to conical gearwheel3 14C, which is connected to the output shaft (not shown).
  • conical gearwheel2 14B and conical gear wheel3 14C create a gearing ratio R1 .
  • the gearing ratio is R1
  • the gearing ratio is 1 ⁇ 2 R1 .
  • other ratios are also possible, for example one can replace the conical gear wheel3 14C with two conical wheels of different dimensions - one engaged with conical gearwheeH 14B and one with conical gearwheel2 14A.
  • FIG 4 showing system 100 of mechanical transmission gear T and a counter rotating electric motor M, according to a yet another embodiment of the current invention.
  • System 100 is operable in three gearing ratios, using two brakes, as elaborated infra.
  • high gear is achieved when brakel 24A is locked, whereas brake2 24B is loose.
  • rotor2 13 rotates output shaft 12 through the one-way bearing 20B and via pulleys 19A and 19B as well as belt 21.
  • Exemplary transition system comprising pulleys 19A and 19B and coupled to rotor2 13 is characterized by a higher gearing ratio.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

La présente invention se rapporte à un système de transmission mécanique entraînée. Le système comprend un arbre de sortie et un moteur électrique doté d'un premier rotor et d'un second rotor qui peut tourner dans le sens inverse par rapport au premier rotor. Le système comprend en outre une transmission qui comporte une première partie conçue pour transmettre un couple de rotation du premier rotor à l'arbre de sortie et une seconde partie conçue pour transmettre un couple de rotation dudit second rotor au dit arbre de sortie dans une direction opposée, par rapport à ladite première partie. Le système comprend en outre un moyen permettant d'empêcher sélectivement une rotation du premier rotor ainsi qu'un palier unidirectionnel disposé entre le premier rotor et l'arbre de sortie. Lorsqu'on empêche sélectivement la rotation du premier rotor, l'arbre de sortie peut tourner selon un rapport de transmission élevé ; tandis que lorsqu'on permet la rotation à la fois du premier rotor et du second rotor, l'arbre de sortie peut tourner selon un rapport de transmission bas.
PCT/IB2013/054552 2012-06-07 2013-06-03 Systèmes et procédés de transmission mécanique pour des moteurs électriques WO2013182964A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261656523P 2012-06-07 2012-06-07
US61/656,523 2012-06-07

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WO2013182964A2 true WO2013182964A2 (fr) 2013-12-12
WO2013182964A3 WO2013182964A3 (fr) 2014-05-01

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Application Number Title Priority Date Filing Date
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800001187A1 (it) * 2018-01-17 2019-07-17 Enecolab S R L Macchina elettrica
WO2023132970A1 (fr) * 2022-01-05 2023-07-13 Salinas Juan Agencement d'alternateur contrarotatif

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2462182A (en) 1945-11-28 1949-02-22 Westinghouse Electric Corp Motor having coaxial counter-rotating shafts
US6540570B1 (en) 2002-01-16 2003-04-01 Robert C. Eakin Counter-rotating transmission
US20100003871A1 (en) 2008-05-02 2010-01-07 Wishart Randell J Increased efficiency counter-rotating electric motor for propelling a boat
US20100033041A1 (en) 2006-11-08 2010-02-11 Sanyo Denki Co., Ltd. Counter-rotating axial-flow fan
US20100090623A1 (en) 2008-10-09 2010-04-15 Tai-Her Yang Electric motor drive system with bi-directional input and constant directional output
US20100236849A1 (en) 2008-05-02 2010-09-23 Wishart Randell J Brushless counter-rotating electric apparatus and system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US399800A (en) * 1889-03-19 Dynamo-electric machine
FR805200A (fr) * 1936-04-21 1936-11-13 Moteur électrique muni de deux arbres coaxiaux à vitesses différentes et, éventuellement, variables
JP2005184973A (ja) * 2003-12-18 2005-07-07 Soqi Inc 発電装置
US20100225190A1 (en) * 2009-03-09 2010-09-09 Huang Hang-Chang Generator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2462182A (en) 1945-11-28 1949-02-22 Westinghouse Electric Corp Motor having coaxial counter-rotating shafts
US6540570B1 (en) 2002-01-16 2003-04-01 Robert C. Eakin Counter-rotating transmission
US20100033041A1 (en) 2006-11-08 2010-02-11 Sanyo Denki Co., Ltd. Counter-rotating axial-flow fan
US20100003871A1 (en) 2008-05-02 2010-01-07 Wishart Randell J Increased efficiency counter-rotating electric motor for propelling a boat
US20100236849A1 (en) 2008-05-02 2010-09-23 Wishart Randell J Brushless counter-rotating electric apparatus and system
US20100090623A1 (en) 2008-10-09 2010-04-15 Tai-Her Yang Electric motor drive system with bi-directional input and constant directional output

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800001187A1 (it) * 2018-01-17 2019-07-17 Enecolab S R L Macchina elettrica
WO2019142221A1 (fr) * 2018-01-17 2019-07-25 Enecolab S.R.L. Machine électrique
WO2023132970A1 (fr) * 2022-01-05 2023-07-13 Salinas Juan Agencement d'alternateur contrarotatif

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