WO2012059962A1 - 電動車両の動力装置 - Google Patents
電動車両の動力装置 Download PDFInfo
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- WO2012059962A1 WO2012059962A1 PCT/JP2010/006521 JP2010006521W WO2012059962A1 WO 2012059962 A1 WO2012059962 A1 WO 2012059962A1 JP 2010006521 W JP2010006521 W JP 2010006521W WO 2012059962 A1 WO2012059962 A1 WO 2012059962A1
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- output shaft
- power
- motor
- electric
- transmission mechanism
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- 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
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/02—Arrangement or mounting of electrical propulsion units comprising more than one electric motor
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- 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
- B60L50/51—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells characterised by AC-motors
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- 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
- B60L15/007—Physical arrangements or structures of drive train converters specially adapted for the propulsion motors of electric vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B60L15/2009—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 for braking
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0061—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electrical machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B60L50/66—Arrangements of batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
- B62K11/00—Motorcycles, engine-assisted cycles or motor scooters with one or two wheels
- B62K11/02—Frames
- B62K11/04—Frames characterised by the engine being between front and rear wheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M7/00—Motorcycles characterised by position of motor or engine
- B62M7/02—Motorcycles characterised by position of motor or engine with engine between front and rear wheels
- B62M7/04—Motorcycles characterised by position of motor or engine with engine between front and rear wheels below the frame
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- 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
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
- B60K2001/0405—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion characterised by their position
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- 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
- B60L2200/00—Type of vehicles
- B60L2200/12—Bikes
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- 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
- B60L2220/00—Electrical machine types; Structures or applications thereof
- B60L2220/10—Electrical machine types
- B60L2220/14—Synchronous machines
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- 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
- B60L2220/00—Electrical machine types; Structures or applications thereof
- B60L2220/40—Electrical machine applications
- B60L2220/42—Electrical machine applications with use of more than one motor
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- 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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/10—Vehicle control parameters
- B60L2240/12—Speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/10—Vehicle control parameters
- B60L2240/36—Temperature of vehicle components or parts
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- 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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/421—Speed
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- 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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/423—Torque
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
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- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/425—Temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60L2240/00—Control parameters of input or output; Target parameters
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- B60L2240/486—Operating parameters
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
- B62K2204/00—Adaptations for driving cycles by electric motor
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- 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
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- 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
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- Y02T10/72—Electric energy management in electromobility
Definitions
- the present invention relates to a power device for an electric vehicle that transmits traveling power generated by the electric motor to drive wheels, and particularly to a power device for an electric vehicle including a plurality of electric motors.
- an object of the present invention is to simplify the configuration of a power device for an electric vehicle including a plurality of electric motors.
- a power device for an electric vehicle includes a power storage device that stores direct current, and an inverter device that generates alternating current from the direct current stored in the power storage device.
- a plurality of electric motors that generate traveling power by receiving AC power generated by the inverter device, and a power transmission mechanism that transmits the rotation of each output shaft portion of the plurality of electric motors to drive wheels,
- a power transmission mechanism mechanically connects the output shaft portions so that the output shaft portions rotate with respect to the drive wheels at the same gear ratio, and the plurality of electric motors is a single inverter. It is connected to a device, and is configured to receive AC power generated by the single inverter device.
- the gear ratios of the drive shafts of the output shafts of the plurality of motors are the same, the synchronization of the plurality of motors is ensured by operating the plurality of motors under the same electrical conditions. can do. Therefore, a single inverter device is provided for a plurality of electric motors, and each electric motor is configured to receive AC power generated by the inverter devices. That is, alternating current of the same frequency and the same phase is fed to each electric motor, so that a plurality of electric motors can be operated in synchronization. In this manner, the configuration of the power device for the electric vehicle can be simplified while ensuring the synchronism of the plurality of electric motors.
- Each output shaft portion of at least two motors of the plurality of motors forms one common output shaft, and the power transmission mechanism transmits the rotation of the common output shaft to the drive wheels. May be.
- the mechanically generated rotational phase difference can be reduced as much as possible with respect to at least two electric motors constituting one common output shaft, and the synchronism of these electric motors can be ensured. Can do.
- these electric motors are arranged in the axial direction, the entire power unit including a plurality of electric motors can be configured compactly in the radial direction of the output shaft portion.
- a power extraction position for extracting the rotation of the common output shaft may be disposed between the two electric motors.
- the distance from each electric motor to the power take-out position can be made as equal as possible, and even if a rotational difference occurs between the two electric motors, the common output shaft can be well prevented from being twisted. .
- Rotational inertia of the plurality of electric motors may be set to be the same as each other.
- a buffer unit provided in the power transmission mechanism and buffering a sudden change in power transmitted between the common output shaft and the drive wheel may be provided.
- variation of the element which comprises a power transmission mechanism can be suppressed favorably, and the shock given to the output shaft part of a motor from a wheel can be loosened favorably.
- the plurality of electric motors are multi-phase AC motors having multi-phase windings of the same number of phases, and the single inverter device outputs multi-phase AC corresponding to the number of phases of the multi-phase windings.
- the same phase winding of the plurality of electric motors may be connected in parallel to the multiphase wiring.
- the AC voltage of the same value generated by the inverter device can be applied to the windings of each motor, and the synchronization of the plurality of motors Can be secured. Then, the AC potential to be generated by the inverter device can be lowered, so that it is not necessary to apply an expensive switching element to the inverter device.
- the electric motor may include a rotor that rotates about an axis line by the power supply of the inverter device, and the rotor may be splined to the common output shaft.
- the rotational phase difference that occurs mechanically becomes a very small amount corresponding to the backlash of the spline groove, so that the synchronization of the electric motor can be ensured satisfactorily.
- the plurality of common output shafts extend in parallel to each other, and the power transmission mechanism is configured to rotate the plurality of common output shafts at the same gear ratio with respect to the intermediate shaft extending in parallel to the plurality of common output shafts.
- a primary transmission mechanism that transmits to the intermediate shaft.
- a configuration is realized in which the transmission gear ratios of the output shaft portions to the drive wheels are the same, and the entire power unit including a plurality of electric motors is arranged in the axial direction and the radial direction of the output shaft portion. Both can be made compact.
- Each electric motor is fixed on the output shaft portion and extends in a radial direction from the outer peripheral surface of the output shaft portion, and extends from the outer edge portion of the flange portion in the axial direction and extends from the outer peripheral surface of the output shaft portion.
- a stator that is stationary in an annular space formed between the permanent magnet and the outer peripheral surface of the output shaft portion, and is fixed to the outer peripheral surface of the stator in a radial direction. And an opposing coil.
- each electric motor becomes a so-called outer rotor type SPM (Surface Permanent Magnet) motor. Then, it becomes possible to divert the general AC generator provided in the conventional engine-mounted two-wheeled vehicle to the electric motor of the power unit, and the productivity of the electric two-wheeled vehicle is improved. Further, compared with the inner rotor type SPM motor, the possibility that the permanent magnet is peeled off by the centrifugal force is reduced, so that the reliability of the power unit is increased. In addition, it is advantageous in that a space for installing the permanent magnet can be secured, and that the rotation radius of the rotor is increased, so that the torque is increased.
- SPM Surface Permanent Magnet
- FIG. 1 is a side view of an electric motorcycle shown as an example of an electric vehicle to which the power plant according to the first embodiment of the present invention is applied as viewed from the right side.
- FIG. 2 is a conceptual diagram schematically showing a mechanical configuration of the power plant shown in FIG.
- FIG. 3 is a conceptual diagram schematically showing an electrical configuration of the power plant shown in FIG. 4 is a cross-sectional view showing the structure around the electric motor of the power plant shown in FIG.
- FIG. 5 is a conceptual diagram schematically showing the electrical configuration of the power plant according to the second embodiment of the present invention.
- FIG. 6 is a cross-sectional view showing the structure around the electric motor of the power plant according to the third embodiment of the present invention.
- FIG. 7A is a side view showing an example of the motor housing of the power plant shown in FIG. 6, and FIG. 7B is a side view showing a modification thereof.
- FIG. 8 is a cross-sectional view showing the structure around the motor of the power plant according to the fourth embodiment of the present invention.
- FIG. 9 is sectional drawing which shows the structure of the periphery of the electric motor of the power plant which concerns on 5th Embodiment of this invention.
- FIG. 10 is sectional drawing which shows the structure of the periphery of the electric motor of the power plant which concerns on 6th Embodiment of this invention.
- FIG. 11 is sectional drawing which shows the structure of the periphery of the electric motor of the power plant which concerns on 7th Embodiment of this invention.
- FIG. 12 is sectional drawing which shows the structure of the periphery of the electric motor of the power plant which concerns on 8th Embodiment of this invention.
- FIG. 1 is a side view of an electric motorcycle 1 to which a power unit 20 according to a first embodiment of the present invention is applied as viewed from the right side.
- the electric motorcycle 1 includes a front wheel 2 and a rear wheel 3.
- the front wheel 2 is rotatably supported at the lower end portion of the front fork 4, and the front fork 4 is connected to the handle 5 via a steering shaft (not shown).
- the handle 5 has a pair of left and right grips, and the right grip is an accelerator grip 6 to which an acceleration / deceleration request is input by a driver.
- the electric motorcycle 1 includes a body frame having a head pipe 7, a main frame 8, a pair of left and right down frames 9, a pivot frame 10, a swing arm 11, and a seat rail 12.
- the head pipe 7 rotatably supports the steering shaft.
- the main frame 8 extends downward from the head pipe 7 and is disposed along the center line in the vehicle width direction.
- Each down frame 9 extends downward from the head pipe 7 while extending outward in the vehicle width direction, and bends in the middle and extends backward.
- the pivot frame 10 connects the rear lower end portion of the main frame 8 and each rear end portion of the down frame 9.
- the swing arm 11 is swingably connected to the pivot frame 10 at the front end portion, and supports the rear wheel 3 so as to be rotatable at the rear end portion.
- a rear wheel suspension 13 is bridged between the front portion of the swing arm 11 and the rear portion of the main frame 8.
- the seat rail 12 extends rearward from the rear portion of the main frame 8, and a seat 14 for riding a driver is provided on the seat rail 12.
- a dummy is used between the seat 14 and the handle 5 in place of the fuel tank.
- a tank 15 is provided.
- the power device 20 includes an electric motor 21, a power transmission mechanism 22, a power storage device 23, an inverter device 24, and a control device 25.
- the motor case 16 of the motor 21 is supported on each rear portion of the main frame 8 and the pair of down frames 9, and the power storage device 23, the inverter device 24, and the control device 25 are between the bent portions of the pair of down frames 9.
- the control device 25 is accommodated in the dummy tank 15, these arrangements can be changed as appropriate.
- FIG. 2 is a conceptual diagram schematically showing the mechanical configuration of the power unit 20 shown in FIG.
- a plurality of (for example, two) electric motors 21 are provided.
- Each motor 21 is a three-phase AC synchronous motor.
- the power transmission mechanism 22 transmits the rotation of each output shaft portion 31 to the rear wheel 3.
- the power transmission mechanism 22 is configured so that the gear ratios of the output shaft portions 31 to the rear wheels 3 are equal to each other, and the rotation phases of the output shaft portions 31 are equal to each other.
- the shaft portions 31 are mechanically connected to each other.
- FIG. 3 is a conceptual diagram schematically showing the electrical configuration of the power unit 20 shown in FIG.
- Each electric motor 21 has a three-phase coil 32 including a U-phase coil 32U, a V-phase coil 32V, and a W-phase coil 32W. One end of each of the coils 32U, 32V, and 32W is star-connected at a neutral point 33. Yes.
- Each electric motor 21 has the same impedance.
- the power storage device 23 has a battery 34 formed by connecting a plurality of cells 35 that can charge and discharge direct current in series. Each cell 35 is connected to a corresponding cell monitor unit 36 (hereinafter referred to as “CMU”), and each CMU 36 monitors the status of the corresponding cell 35 (for example, the storage amount).
- CMU cell monitor unit 36
- the inverter device 24 is connected to the battery 34 through a power line 37 and a ground line 38.
- the inverter device 24 includes a U-phase arm 39U, a V-phase arm 39V, and a W-phase arm 39W.
- the arms 39U, 39V, and 39W are connected in parallel between the power supply line 37 and the ground line 38. .
- Each arm 39U, 39V, 39W is formed by connecting two arm elements each composed of a switching element and a diode in series.
- the U-phase arm 39U is connected to the U-phase line 40U at the midpoint between the two arm elements constituting the U-phase arm 39U.
- the V-phase arm 39V and the W-phase arm 39W are connected to the V-phase line 40V and the W-phase line 40W, respectively.
- the U-phase arm 39U By controlling on / off switching of a total of six switching elements, the U-phase arm 39U generates a U-phase alternating current from the direct current from the power line 37, and this U-phase alternating current is output to the U-phase line 40U.
- the V-phase alternating current generated by the V-phase arm 39V is output to the V-phase line 40V
- the W-phase alternating current generated by the W-phase arm 39W is output to the W-phase line 40W.
- the inverter device 24 converts the direct current from the power storage device 23 into a three-phase alternating current, and applies the three-phase alternating current to the three-phase wire 40 including the U-phase wire 40U, the V-phase wire 40V, and the W-phase wire 40W. Output.
- the control device 25 includes a vehicle control unit 41, a power supply control unit 42, and an inverter control unit 43.
- the vehicle control unit 41 is connected to each CMU 36 via the power supply control unit 42, and information representing the status of the cell 33 monitored by each CMU 36 is input to the vehicle control unit 41.
- the vehicle control unit 41 is connected to a plurality of sensors that detect various conditions of the vehicle.
- sensors include an accelerator sensor 46 that detects the amount of operation of the accelerator grip 6, a vehicle speed sensor 47 that detects the vehicle speed, a rotation speed sensor 48 that detects the rotation speed of the electric motor 21, and a current flowing through the three-phase line 40.
- a current sensor 49 for detecting the value is included.
- the vehicle control unit 41 is connected to each switching element of the inverter device 24 via the inverter control unit 43.
- the vehicle control unit 41 generates a command signal related to the operation of each arm 39U, 39V, 39W, for example, in response to an input from the accelerator sensor 46, and outputs the generated command signal to the inverter control unit 43.
- the inverter control unit 43 controls on / off of each switching element according to the command signal. Through such control, it is possible to variably control the current value and frequency of the three-phase AC output to the three-phase line 40 in accordance with the degree of acceleration / deceleration demand of the driver.
- a plurality of electric motors 21 are provided for one inverter device 24 and one set of three-phase wires 40.
- Each neutral point 33 of the plurality of electric motors 21 is connected in parallel to the U-phase line 40U forming the three-phase line 40, is connected in parallel to the V-phase line 40V, and is connected in parallel to the W-phase line 40W.
- generated by the inverter apparatus 24 flows into each three-phase coil 32 of the some electric motor 21, and the alternating current of the same voltage is applied.
- the plurality of electric motors 21 have the same impedance, alternating currents having the same current flow through the three-phase coils 32.
- the plurality of electric motors 21 operate under the same electrical conditions.
- the electric motors 21 since the output shaft portions 31 of the electric motors 21 are mechanically connected to the rear wheel 3 so as to rotate at the same gear ratio, the electric motors 21 generate the same amount of traveling power.
- the driving load is equally shared. Thereby, it can suppress favorably that each electric motor 21 interferes in operation.
- the inverter device 24 and the electric motor 21 are in a one-to-many relationship, the electrical configuration around the inverter device 24 is simplified, and the increase in cost of the inverter device 24 is suppressed.
- the direct current supplied to the inverter device 24 is secured at most for the voltage to be applied to the three-phase coil 32. For this reason, even if the potential of the battery 34 is not particularly increased, the plurality of electric motors 21 can be driven. As a result, the number of cells 35 can be reduced, so that the number of CMUs 36 and the arrangement space of the battery 34 can be reduced. Therefore, the increase in cost and size of the power storage device 23 can be suppressed. At the same time, since the potential required for the inverter device 24 is also low, it is not necessary to apply an expensive switching element to the inverter device 24, and the cost of the inverter device 24 can be reduced.
- two electric motors 21 are provided. However, on the three-phase line 40, a high output state in which current is supplied to these two electric motors 21 and one of the two electric motors 21.
- a switch circuit that switches between a low output state in which the current supply is stopped may be provided. In a state where a high output is unnecessary, such as a constant speed traveling state, by switching to a low output state by a switch circuit, an undesired output can be suppressed and the travelable distance can be extended. For example, when the acceleration command from the driver is not given for a certain period, when the traveling speed is constant, or when the speed is high, it may be switched to a low output state. Even when three or more electric motors are used, similarly, it is preferable to have a switch circuit that can change the number of electric motors 21 that supply driving currents.
- the regenerative power may be excessive if a plurality of motors 21 are used as the generator.
- the control means determines the necessary regenerative power based on the vehicle traveling state or the driving command, and determines that a large regenerative power is required
- the switch circuit of the electric motor 21 used as the generator is used.
- circuit connections may be made so that the number increases, and it is determined that a small regenerative power is sufficient
- circuit connections may be made so that the number of motors 21 used as generators is reduced by a switch circuit. For example, when the requested deceleration amount (brake amount) is large, it is determined that a large regenerative force is necessary, and when the requested operation deceleration amount is small, it is determined that a small regenerative force is necessary. To do.
- FIG. 4 is a cross-sectional view showing a structure around the electric motor 21 of the power unit 20 shown in FIG.
- the power unit 20 is provided with two electric motors including a first electric motor 21A and a second electric motor 21B.
- Each electric motor 21 is an outer rotor type SPM motor, and a generator applied to an engine-mounted motorcycle can be used.
- the motor of another drive system may be sufficient.
- an inner rotor type SPM motor or a motor other than the SPM type may be used.
- Each electric motor 21 includes a rotor 51 fixed to the output shaft portion 31.
- the rotor 51 includes a cylindrical boss portion 52 that is spline-fitted to the outer peripheral side of the output shaft portion 31 and fixed to the output shaft portion 31, a disk-shaped flange portion 53 that extends from the boss portion 52 in the radial direction, and A cylindrical peripheral wall portion 54 extending in the axial direction from the outer peripheral edge portion of the flange portion 53 is provided.
- the inner peripheral surface of the peripheral wall portion 54 is disposed away from the output shaft portion 31 in the radial direction, and the permanent magnet 55 is bonded to the inner peripheral surface.
- a cylindrical stator 56 is placed between the surface of the permanent magnet 55 and the outer peripheral surface of the output shaft portion 31.
- the cylindrical peripheral wall portion of the stator 56 forms a support portion 56a on which the coil 32 is provided on the outer peripheral surface.
- the rotor 51 is rotated by the magnetic force, and the output shaft portion 31 is rotationally driven.
- the electric motor 21 is an outer rotor type
- the permanent magnet 55 is pressed against the inner peripheral surface of the peripheral wall portion 54 by centrifugal force when the rotor 51 and the output shaft portion 31 are rotating, thereby preventing the permanent magnet 55 from peeling off. can do.
- a large installation space for the permanent magnet 55 can be secured.
- the rotation radius of the rotor 51 is increased, the torque of the output shaft portion 31 is increased accordingly.
- the output shaft portion 31 of the first electric motor 21A and the output shaft portion 31 of the second electric motor 21B are integrated on the same axis line to form one common output shaft 61.
- Spline grooves 62 extending in the axial direction are formed on the outer peripheral surface of the common output shaft 61 and the inner peripheral surface of the boss portion 52, and each boss portion 52 is spline-fitted to the common output shaft 61.
- the first motor 21A and the second motor 21B have the same rotor inertia (rotational inertia).
- the rotor 51 and the stator 56 of each motor 21A, 21B have the same shape. It is formed. Thereby, it is possible to satisfactorily prevent a difference in rotation between the first electric motor 21A and the second electric motor 21B and reduce the number of parts.
- the first motor 21A and the second motor 21B are arranged symmetrically with respect to a plane perpendicular to the axis, and the stators of the motors 21A and 21B are arranged on the outer side of the common output shaft 61. ing.
- the stator 56 can be fixed to the motor cover 72, and the stator 56 is disposed closer to the inner side of the common output shaft 61. Compared with the case where it does, it is easy to form the fixing
- the fixed portion 56b is a cylindrical bottom wall portion of the stator 56 (in the present embodiment, a circular hole is formed at the center of the cylindrical bottom wall portion, and the fixed portion 56b has a ring shape. ). Further, since the flange portion 53 of the rotor 51 is disposed near the center of the common output shaft, the length of the common output shaft 61 can be shortened as much as possible.
- the power transmission mechanism 22 includes the common output shaft 61, a primary transmission mechanism 63, an intermediate shaft 64, and a secondary transmission mechanism 65.
- the intermediate shaft 64 extends in parallel with the common output shaft 61.
- the primary transmission mechanism 63 is interposed between the common output shaft 61 and the intermediate shaft 64 and transmits the rotation of the common output shaft 61 to the intermediate shaft 64.
- the secondary transmission mechanism 64 is interposed between the intermediate shaft 64 and the axle 3a (see FIG. 2) of the rear wheel 3 (see FIG. 2), and transmits the rotation of the intermediate shaft 64 to the axle 3a.
- the transmission gear ratio of the common output shaft 61 to the rear wheel 3 is equivalent to the transmission gear ratio of the primary transmission mechanism 63 multiplied by the transmission gear ratio of the secondary transmission mechanism 65.
- the common output shaft 61 forms the output shaft portion 31 of the first electric motor 21A and the output shaft portion 31 of the second electric motor 21B, the rear wheels of the output shaft portions 31 of the first electric motor 21A and the second electric motor 21B.
- the gear ratios for 3 are equal to each other.
- the primary transmission mechanism 63 includes a primary drive element 63a configured to rotate with the common output shaft 61, and a primary driven element 63b that is rotationally driven by the primary drive element 63a.
- the primary driven element 63b is an intermediate shaft. It is comprised so that it may rotate with 64.
- FIG. 3 illustrates a case where a gear mechanism is employed as the primary transmission mechanism 63, and the primary drive element 63a is a drive gear and the primary driven element 63b is a driven gear that meshes with the drive gear, but this is merely an example.
- a chain transmission mechanism or a belt transmission mechanism may be employed.
- the power take-out position where power is taken out from the common output shaft 61 (that is, the position where the primary drive element 63a of the primary transmission mechanism 63 is provided) is set between the two electric motors 21A and 21B.
- the power take-off position is set to a position that is the center of the common output shaft 61 in the axial direction and serves as a reference for line symmetry of the two electric motors 21A and 21B.
- bearings 86 for rotating and supporting the common output shaft 61 are disposed on both sides in the axial direction of the power take-out position. As a result, it is possible to stably rotate and support the power take-out position where load is easily applied, and to take out the output stably.
- the power transmission mechanism 22 is provided with a buffer unit that buffers a sudden change in power transmitted between the common output shaft 61 and the rear wheel 3 on the downstream side in the rotation transmission direction with respect to the common output shaft 61. .
- a damper spring 68 is interposed in a driven gear that is the primary driven element 63a.
- the secondary transmission mechanism 65 includes a secondary drive element 67 configured to rotate with the intermediate shaft 64, and a secondary driven element 65b (see FIG. 2) that is rotationally driven by the secondary drive element 65a.
- the secondary driven element 65b is configured to rotate together with the axle 3a (see FIG. 2).
- FIG. 3 shows an example in which a chain transmission mechanism is adopted as the secondary transmission mechanism 65, and the chain is wound around these chains using the secondary drive element 65a as a driving chain wheel and the secondary driven element 65b as a driven chain wheel.
- a gear mechanism or a belt transmission mechanism may be employed, or a shaft drive type may be employed.
- the rotation of the electric motor is decelerated and transmitted to the traveling wheels.
- the outputs of the two electric motors are combined as a single power at the high rotational power transmission mechanism where the rotational speed is higher than that of the drive wheels.
- the rotational inertia can be suppressed by synthesizing power via a rod-shaped shaft as compared with the case where power is synthesized via a gear on a disk.
- the mechanical mechanism for combining the powers of the two electric motors may be any mechanism that mechanically transmits the rotational power, and includes a spline structure or a gear structure, a belt mechanism or a chain mechanism, a worm mechanism, and the like. Also good.
- the motor case 16 includes a motor housing 71 formed by combining a pair of halves 73 and 74, and a motor cover 72 that partially covers the motor housing 71 from the outside in the vehicle width direction.
- the motor housing 71 accommodates a common output shaft 61 and an intermediate shaft 64 that extend parallel to the vehicle width direction.
- the pair of halves 73 and 74 are divided in the direction perpendicular to the axis of these two shafts, and the dividing line of the motor housing 71 appears outside in the vehicle width direction.
- the motor case 16 is supported by the frame such that the common output shaft 61 is disposed above the intermediate shaft 64, and the heavy motor 21 provided on the common output shaft 61 is attached to the main frame 8. It can be placed in a close position. Thereby, mass concentrates on the center of gravity of the whole vehicle which is similarly located in the vicinity of the main frame 8, and the maneuverability can be improved. In addition, since the size of the lower portion of the motor case 16 in the vehicle width direction is reduced as compared with the upper portion where the two electric motors 21 are arranged in the axial direction, the bank angle that the motorcycle 1 can secure is increased. be able to.
- the motor housing 71 has a pair of left and right motor housing portions 75, a mechanism housing portion 76 and a shaft housing portion 77.
- the pair of motor housing portions 75 are formed in a substantially cylindrical shape and are arranged on the same axis.
- Each motor accommodating portion 75 has a circular opening at the outer end in the axial direction, and the motor cover 72 is provided so as to close the opening.
- the mechanism housing portion 76 includes a drive side housing portion 78 provided between the pair of left and right motor housing portions 75 and a driven side provided so as to protrude outward in the radial direction of the motor housing portion 71 when viewed in the axial direction. And an accommodating portion 79.
- the drive side accommodation portion 78 is adjacent to each motor accommodation portion 75 via a pair of left and right partition walls 80. Further, the driving side accommodation portion 78 and the driven side accommodation portion 79 are formed in a circular cross section when viewed in the axial direction, and the inside of the driving side accommodation portion 78 communicates with the inside of the driven side accommodation portion 79. Therefore, when viewed in the axial direction, the mechanism accommodating portion 75 is formed in a bowl shape in which two circles having different center positions intersect at two points. A through hole 81 is formed in the central portion of the left wall of the driven side accommodating portion 79.
- the shaft accommodating portion 77 is formed in a substantially cylindrical shape, and protrudes to the left from the outer peripheral edge of the through hole 81 on the outer surface of the left wall.
- the common output shaft 61 includes a mechanism mounting portion 61c to which the primary drive element 63a is fixed, a pair of journal portions 61b located on both sides in the axial direction of the mechanism mounting portion 61a, and an axial end of each journal portion 61b. It has a pair of motor attachment parts 61c located. Each journal portion 61b is rotatably supported by a bearing 86 that is mounted in the partition wall 80 so as not to move in the axial direction. For this reason, the mechanism attachment portion 61a is accommodated in the drive side accommodation portion 78 of the mechanism accommodation portion 76 together with the primary drive element 63a.
- the pair of motor mounting portions 61 c are accommodated in a space formed by the partition wall 80, the motor accommodating portion 75, and the motor cover 72.
- the intermediate shaft 64 is rotatably supported by a bearing 87 provided on the inner diameter side of the through hole 81 and a bearing 88 provided in the shaft accommodating portion 77.
- the right end portion of the intermediate shaft 64 protrudes into the driven side accommodating portion 79 through the through hole 81, and the primary driven element 63b of the primary transmission mechanism 63 is fixed to the right end portion.
- the left end portion of the intermediate shaft 64 protrudes to the outside from the shaft accommodating portion 77, and the secondary drive element 65a of the secondary transmission mechanism 65 is fixed to the left end portion.
- the spline groove 62 is formed in the motor mounting portion 61c, and the rotor 51 of the electric motor 21 is spline fitted to the motor mounting portion 61c and accommodated in the space.
- the rotor 51 is provided in a state where the flange portion 53 is positioned on the center side in the axial direction and is close to the partition wall 80.
- the stator 56 of the electric motor 21 is fastened to the inner surface of the motor cover 72 with a stator bolt 89 and is provided so as to protrude from the inner surface of the motor cover 72 toward the center in the axial direction. Placed.
- the distal end portion in the axial direction of the peripheral wall portion 54 defines the opening of the bowl-shaped rotor 51, and a plurality of fins 90 are provided at the distal end portion at intervals in the circumferential direction.
- the two electric motors 21A and 21B are arranged on both sides in the vehicle width direction. For this reason, when the electric motor case is supported by the frame, the two electric motors 21A and 21B are easily cooled by receiving the traveling wind, so that an increase in temperature of the coil or the like can be suppressed.
- the coil provided in the stator can be disposed on the outer side in the vehicle width direction, and the temperature rise of the coil is preferably achieved by air cooling. Can be suppressed.
- the support portion 56a of the stator 55 that supports the coil 32 is connected to the case where the traveling wind collides so as to be able to conduct heat, the heat generated in the coil 32 is cooled by the traveling wind via the support portion 56a. Communicated to the case. Thereby, the temperature rise of the coil 32 can be further suppressed.
- the assembly procedure of the motor case 16, the motor 21, and the power transmission mechanism 22 having the above-described configuration will be described.
- the primary drive element 63a is fitted in the mechanism mounting portion 61a of the common output shaft 61 in advance, the primary drive element 63a is sandwiched between the pair of C clips 93 in the axial direction, the bearing 86 is fitted in each journal portion 61b, and the motor mounting portion 61c.
- the rotor 51 is spline-fitted and a nut 94 is temporarily fastened to the tip of the motor mounting portion 61c.
- bearings 87 and 88 are fitted into the intermediate shaft 64.
- the stator 56 and the passage member 92 are attached to the inner surface of the motor cover 72.
- the common output shaft 61 is attached to the one half body together with the rotor 51 and the primary drive element 63a by fitting the bearing 86 into one partition wall 80 of the pair of half bodies 73, 74. Further, the intermediate shaft 64 is attached to the one half body by fitting the bearings 87 and 88 into the through hole 81 and the shaft accommodating portion 77. Next, the primary driven element 63 b is fitted into the right end portion of the intermediate shaft 64 while being engaged with the primary drive element 63 a, and the nut 95 is tightened to the right end portion of the intermediate shaft 64.
- the other half is assembled to the one half.
- the circular opening of the motor housing portion 75 is configured.
- the accessible nut 94 is tightened because the motor housing 75 has an opening.
- the boss portion 52 is sandwiched between the nut 94 and the bearing 86, and the rotor 51 is positioned in the axial direction.
- the motor cover 72 is attached to the motor housing portion 75 so as to close the opening.
- the stator 56 is inserted into the inner peripheral side of the rotor 51 and is allowed to stand by simply attaching the motor cover 72 in this way.
- the motor cover 72 when the motor cover 72 is attached to the motor housing portion 75, a positioning mechanism (not shown) that positions the motor cover 72 in the circumferential direction with respect to the motor housing portion 75 is used. Accordingly, the first passage 91a provided in the motor housing 71 can be easily communicated with the second passage 91b provided in the motor cover 72, and the coolant passage 91 can be simply configured.
- the primary transmission mechanism 63 and the intermediate shaft 64 are accommodated in the electric motor case 16, lubrication between the electric motor 21 and the common output shaft 61 and lubrication related to the primary transmission mechanism 63 are performed in the same case.
- the configuration of the lubrication system can be simplified.
- the mechanism housing portion 76 in which the primary transmission mechanism 63 is housed is located in the central portion in the axial direction, and the motor housing portion for housing the electric motor 21 on both sides in the axial direction around the mechanism housing portion 76. 75 is provided.
- the lubrication between the electric motor 21 and the common output shaft 61 and the lubrication with respect to the primary transmission mechanism 63 are realized by a simple structure in which the lubricating oil is supplied to the motor housing portion 75 through the mechanism housing portion 76. be able to.
- FIG. 5 is a conceptual diagram schematically showing the electrical configuration of the power plant 120 according to the second embodiment of the present invention.
- coils of the same phase among the plurality of electric motors 21 are connected in parallel to corresponding wirings of the three-phase wires 40, but the coils of the same phase are connected in series as shown in FIG. It is also possible to do. That is, one end of U-phase wire 140U, V-phase wire 140V and W-phase wire 140W forming three-phase wire 140 is star-connected at a single neutral point 133, and a plurality of U-phase coils are formed on U-phase wire 140U.
- the inverter devices 24 and the motors 21 are provided in a one-to-many relationship in the same manner as in the first embodiment, and each motor 21 can satisfactorily interfere with each other's operation. Can be suppressed.
- FIG. 6 is a cross-sectional view showing the structure around the electric motor of the power plant 220 according to the third embodiment of the present invention.
- the power unit 220 according to the present embodiment includes four electric motors including a first electric motor 21A, a second electric motor 21B, a third electric motor 21C, and a fourth electric motor 21D, and all the electric motors 21 are provided. It is an outer rotor type SPM motor similar to the first embodiment.
- Each output shaft portion 31 of the first electric motor 21A and the second electric motor 21B has one common output shaft (hereinafter referred to as “first common output shaft 61A” in the present embodiment) in the same manner as in the first embodiment. Is made.
- Each output shaft portion 31 of the third motor 21C and the fourth motor 21D has one second common output shaft in the same manner as the first common output shaft 61A (that is, the common output shaft 61 of the first embodiment). 61B is formed.
- the power transmission mechanism 222 includes these two common output shafts 61A and 61B, a primary transmission mechanism 263, and an intermediate shaft 64 and a secondary transmission mechanism 65 similar to those in the first embodiment.
- the first common output shaft 61A, the second common output shaft 61B, and the intermediate shaft 64 extend in parallel to each other.
- the primary transmission mechanism 263 is interposed between the intermediate shaft 64 and the first common output shaft 61A, and between the intermediate shaft 64 and the second common output shaft 61B, and rotates the first common output shaft 61A.
- the rotation is transmitted to the intermediate shaft 64 and the rotation of the second common output shaft 61B is transmitted to the intermediate shaft 64. Therefore, the primary transmission mechanism 263 includes a primary driven element 263b similar to that of the first embodiment, a first primary drive element 263Aa fixed to the mechanism mounting portion 61Aa of the first common output shaft 61A, and a second common output shaft.
- the first primary drive element 263Ba is fixed to the mechanism mounting portion 61Ba of 61B, and the primary driven element 263b is rotationally driven by these two primary drive elements 263Aa and 263Ba.
- the primary transmission mechanism 263 is configured such that the gear ratios of the common output shafts 61A and 61B to the intermediate shaft 64 are equal to each other.
- the gear ratios of the output shaft portions 31 of the four electric motors 21 to the rear wheels 3 are equal to each other, and the four electric motors 21 are substantially synchronized. It can be operated.
- the four electric motors are divided into two groups, and the two electric motors constituting each group are provided on one common output shaft. With this configuration, the power unit 220 can be configured compactly in the axial direction despite the four electric motors 21 being provided.
- the mechanism housing portion 276 of the motor housing 271 of the motor case 216 includes a driven side housing portion 279 similar to that of the first embodiment, a first drive side housing portion 278A that houses the first primary drive element 263Aa, and a second And a second drive side accommodating portion 278B that accommodates the secondary drive element 263Ba.
- the first drive side accommodating portion 278A and the second drive side accommodating portion 278B are provided adjacent to the driven side accommodating portion 279 in the radial direction and separated from each other in the circumferential direction.
- the interior of the driven side accommodation portion 279 communicates with the inside of the first drive side accommodation portion 278A and the inside of the second drive side accommodation portion 278B, respectively.
- a pair of left and right motor accommodation portions 275 similar to those of the first embodiment are provided via a partition wall 280A.
- a pair of left and right motor housing portions 275 similar to those of the first embodiment are also provided on both sides of the second drive side housing portion 278B in the axial direction via partition walls 280B.
- FIG. 7A is a side view showing an example of the motor housing 271 of the power unit 220 shown in FIG. 6, and FIG. 7B is a side view showing a modification thereof, and FIG.
- the cross section shown in FIG. 6 appears both when cut along the VI-VI line shown in FIG. 6 and when cut along the VI-VI line shown in FIG. 6B.
- the primary transmission mechanism 263 is a gear mechanism, and that the first primary drive element 263Aa and the second primary drive element 263Ba have the same diameter and the same number of teeth.
- the axis O61A of the first common output shaft 61A and the axis O61B of the second common output shaft 61B are centered on the axis O64 of the intermediate shaft 64.
- the primary driven element 263b is disposed on a circumference having a radius R corresponding to the sum of the pitch circle radius rb of the primary driven element 263b and the pitch circle radius ra of the primary drive elements 263Aa, 263Ba.
- the first common output shaft 61A, the second common output shaft 61B, and the intermediate shaft 64 may be arranged such that the angle ⁇ is 180 ° (see FIG. 7A) or other angles. (See FIG. 7B).
- the intermediate shaft when a plurality of electric motors are arranged at equal intervals in the circumferential direction, the intermediate shaft can be prevented from being twisted, and the intermediate shaft can be smoothly rotated.
- FIG. 7B in the case where a plurality of electric motors are arranged at unequal intervals in the circumferential direction, the interference between the electric motor case and the swing arm can be obtained by arranging the portion on the side having a small interval on the front side.
- the portion with the narrower interval is disposed on the upper side, the bank angle can be increased to enable turning.
- FIG. 8 is a cross-sectional view showing the structure around the electric motor of the power plant 320 according to the fourth embodiment of the present invention.
- the power unit 320 according to the present embodiment includes two electric motors including a first electric motor 21A and a second electric motor 21B, and the two electric motors 21A and 21B are the same outer rotor type as in the first embodiment. SPM motor.
- Each output shaft portion 31 of the first electric motor 21A and the second electric motor 21B constitutes one common output shaft 361.
- the power transmission mechanism 322 includes the single common output shaft 361 and the same primary transmission mechanism 63, intermediate shaft 64, and secondary transmission mechanism 65 as those in the first embodiment.
- the gear ratios for (see FIG. 1) are equal to each other.
- the common output shaft 361 includes a mechanism attachment portion 361a to which the primary drive element 63a of the primary transmission mechanism 63 is attached, a pair of journal portions 361b, and a single motor attachment portion 361c in which a spline groove 362 is formed. Yes.
- the pair of journal portions 361b are provided separately at both ends of the common output shaft 361, and the mechanism mounting portion 361a is adjacent to the right side of the left journal portion 361b.
- the motor attachment portion 361c is provided between the mechanism attachment portion 361a and the right journal portion 361b.
- the rotor of the first electric motor 21A and the rotor of the second electric motor 21B form an integral rotating body 351, and this rotating body 351 is spline-fitted to a single motor mounting portion 361c.
- the rotating body 351 has a boss portion 352 and a flange portion 353 in common.
- a peripheral wall portion 354 extends from the outer peripheral edge portion of the common flange portion 353 to both sides in the axial direction (left-right direction), and the permanent magnet 55 of the first electric motor 21A is formed on the inner peripheral surface of the portion extending to the left side.
- the permanent magnet 55 of the second electric motor 21B is bonded to the inner peripheral surface of the portion that is bonded and extends to the right.
- the boss part is shared, the mechanical rotational phase difference between the rotors can be eliminated, and the synchronism of the first electric motor 21A and the second electric motor 21B can be further improved.
- the flange part is made common, two electric motors can be arranged compactly in the axial direction. Further, the rotational inertia can be set to be the same between the left and right electric motors.
- the mechanism housing portion 376 of the motor housing 371 of the electric motor case 316 includes a driving side housing portion 378 and a driven side housing portion 379 similar to those of the first embodiment.
- the shaft housing portion 377 of the motor housing 371 protrudes leftward from the driven side housing portion 379.
- the motor housing portion 375 of the motor housing 371 is adjacent to the right side of the drive side housing portion 377 via the partition wall 380.
- the motor housing portion 375 has a circular opening at the end in the axial direction, and the motor case 372 is attached to the motor housing 371 so as to close the opening.
- the left journal portion 361b of the common output shaft 361 is rotatably supported by a bearing 386a attached to the drive side accommodating portion 376, and the right journal portion 361b is rotated by a bearing 386B attached to the inner surface of the motor cover 372. Supported as possible. Then, the mechanism attachment portion 361 a and the primary drive element 63 a are accommodated in the drive side accommodation portion 378, and the motor attachment portion 361 c and the rotating body 351 are accommodated in the motor accommodation portion 375.
- the stator 56 of the first electric motor 21A is fastened to the right end surface of the partition wall 380, and the stator 56 of the second electric motor 21B is fastened to the inner surface of the motor cover 372.
- the stators 56 can be stationary using the partition wall 380 and the motor cover 372.
- the right end portion of the intermediate shaft 64 is rotatably supported by a bearing 387 attached to the inner surface of the right wall of the driven side accommodating portion 378, and the left end portion of the intermediate shaft 64 is a bearing 388 accommodated in the shaft accommodating portion 377. Is supported rotatably.
- the power take-out position for extracting the rotation of the common output shaft 361 is arranged at one end portion (left end portion in the illustrated example) of the common output shaft, two electric motors provided on the common output shaft 361 21A and 21B can be arranged on the other side (right side in the illustrated example) of the common output shaft. For this reason, since it is possible to arrange the two electric motors 21A and 21B so as to be deviated from the center in the vehicle width direction, the remaining parts arranged on the side opposite to the side where the two electric motors are arranged can be obtained. Can be balanced.
- FIG. 9 is a cross-sectional view showing the structure around the electric motor of the power plant 420 according to the fifth embodiment of the present invention.
- the power unit 420 according to the present embodiment includes two electric motors including a first electric motor 21A and a second electric motor 21B, as in the fourth embodiment, and the two electric motors are outer rotor type SPMs.
- Each output shaft portion 31 forms one common output shaft 361 and each rotor forms an integral rotating body 351.
- the power transmission mechanism 422 includes one common output shaft 361, a primary transmission mechanism 463, a clutch 466, a first intermediate shaft 464A, a transmission mechanism 467, a second intermediate shaft 464B, and a secondary transmission mechanism 65.
- the common output shaft 361, the first intermediate shaft 464A, and the second intermediate shaft 464B extend in parallel to each other.
- the primary driven element 463b of the primary transmission mechanism 463 is configured to rotate together with the input element 466a of the clutch 466.
- the clutch 466 is provided at one end portion (right end portion in the illustrated example) of the first intermediate shaft 464A in the axial direction.
- the transmission mechanism 467 is a parallel shaft type manual two-stage transmission. That is, the first transmission gear train 467a and the second transmission gear train 467b having different transmission ratios are interposed between the first intermediate shaft 464A and the second intermediate shaft 464B.
- Each of the transmission gear trains 467a and 467b has a drive gear that rotates integrally with the first intermediate shaft 464A, and a driven gear that meshes with the drive gear and is provided on the second intermediate shaft 464B so as to be relatively rotatable.
- a sleeve 467c is provided between the driven gears of the transmission gear trains 467a and 467b. The sleeve 467c rotates with the second intermediate shaft 464B and is movable along the axial direction.
- the driven gear is provided with dog teeth 467d on the end surface on the side where the sleeve 467c is disposed, while engaging holes 467e capable of engaging with the dog teeth 467c are formed on both surfaces in the axial direction of the sleeve 467c.
- a shift lever (not shown) operated by the driver is attached to the sleeve 467c, and the position of the sleeve 467c in the axial direction depends on the first gear position and the second gear position according to the driver's operation. And switched between neutral positions.
- the transmission gear ratio with respect to the rear wheels (see FIG. 1) of the common output shaft 461 is the transmission gear ratio of the secondary transmission mechanism 65, the transmission gear ratio selected in the transmission mechanism 467, and the transmission gear ratio of the primary transmission mechanism 464. Is equivalent to the product of. Since the common output shaft 461 forms the output shaft portion 31 of the first electric motor 21A and the output shaft portion 31 of the second electric motor 21B, the gear ratio with respect to the rear wheel 3 of each output shaft portion 31 of the electric motors 21A and 21B. Can be equal to each other. In addition, the driver can change the gear ratio according to the driving situation.
- the motor housing 471 of the electric motor case 416 has a driven side accommodating portion 479 similar to that of the first embodiment, and a transmission accommodating portion 496 is adjacent to the left side of the driven side accommodating portion 479 via a partition wall 480B.
- the transmission housing portion 496 houses the left side portion of the first intermediate shaft 464A, the speed change mechanism 467, and the second intermediate shaft 464B.
- the motor housing portion 475 of the motor housing 471 is provided so as to be adjacent to the transmission housing portion 496 in the radial direction. A left portion of the motor housing portion 475 of the motor housing 471 is opened, and a motor cover 472 is provided so as to cover the left portion opening.
- the stator 56 of the first electric motor 21A is fixed to the partition wall 480A, and the stator 56 of the second electric motor 21B is fixed to the inner surface of the motor cover 472.
- the right side of the driven housing portion 479 of the motor housing 471 is open, and a clutch cover 486 is provided so as to cover the right opening, whereby the clutch 466 is housed in the motor case 416.
- the motor housing portion 475 and the transmission housing portion 496 are on the same side (left side in the illustrated example) in the axial direction. Since it arrange
- FIG. 10 is a cross-sectional view showing the structure around the electric motor of the power plant 520 according to the sixth embodiment of the present invention.
- the power unit 520 of the present embodiment includes two electric motors including a first electric motor 21A and a second electric motor 21B, and these two electric motors are the outer rotor type SPM motor as in the first embodiment. It is.
- the output shaft portions 31 of the first electric motor 21A and the second electric motor 21B form one common output shaft 561.
- the power transmission mechanism 522 includes the single common output shaft 561, the primary transmission mechanism 63, the intermediate shaft 64, and the secondary transmission mechanism 65 similar to those in the first embodiment.
- the gear ratios for the rear wheels 3 (see FIG. 1) of the output shaft portions 31 can be made equal to each other.
- the common output shaft 561 has a mechanism mounting portion 561a, a pair of journal portions 561b, and a pair of motor mounting portions 561c.
- the pair of journal portions 561b are provided at the left end portion of the common output shaft 561 and the central portion in the axial direction.
- the mechanism attachment portion 561a is provided adjacent to the right side of the journal portion 561b at the left end, and one motor attachment portion 561c is provided between the mechanism attachment portion 561a and the journal portion 561b at the center portion, and the other
- the motor mounting portion 561c is provided at the right end portion of the common output shaft 561.
- the mechanism housing portion 576 of the motor housing 571 of the electric motor case 516 has a driving side housing portion 578 and a driven side housing portion 579 similar to those in the first embodiment.
- the shaft accommodating portion 577 is provided so as to protrude from the left wall of the driven side accommodating portion 578 to the left side.
- the pair of motor housing portions 575 are provided so as to be aligned with the drive side housing portion 578 in the axial direction.
- the motor housing portion 575 is adjacent to the right side of the drive side housing portion 578, and the left portion of the motor housing portion 575 is open.
- a partition member 580 is attached to the motor housing portion 575 from the left side so as to cover the opening, and a motor cover 572 is attached to the motor housing portion 575 from the left side so as to accommodate the partition member 580.
- the journal portion 561b of the common output shaft 561 is rotatably supported by a bearing 586A attached to the drive side accommodating portion 578 and a bearing 586B attached to the center portion of the partition wall member 580.
- the mechanism attaching portion 561a is accommodated in the drive side accommodating portion 578
- the left motor attaching portion 561c is accommodated in the left motor accommodating portion 575
- the right motor attaching portion 561c is accommodated in the motor cover 572.
- the rotor 51 of the first electric motor 21A is spline fitted to the left motor mounting portion 561c
- the rotor 51 of the second electric motor 21B is spline fitted to the right motor mounting portion 561c.
- the stator 56 of the first electric motor 21A is fastened to the left side surface of the partition wall member 580
- the stator 56 of the second electric motor 21B is fastened to the right side surface of the partition wall member 580.
- This embodiment is also beneficial because, similarly to the fourth embodiment, two electric motors can be displaced from the center in the vehicle width direction.
- FIG. 11 is a cross-sectional view showing the structure around the electric motor of the power plant 620 according to the seventh embodiment of the present invention.
- the power unit 620 of the present embodiment includes four electric motors including a first electric motor 21A, a second electric motor 21B, a third electric motor 21C, and a fourth electric motor 21D, and all the electric motors are outer rotor type SPMs. It is a motor.
- the output shaft portions 31 of the four electric motors 21A, 21B, 21C, and 21D form one common output shaft 661.
- the power transmission mechanism 622 includes the single common output shaft 661, and a primary transmission mechanism 63, an intermediate shaft 64, and a secondary transmission mechanism 65 similar to those in the first embodiment. Also in this embodiment, the gear ratios for the rear wheels (see FIG. 1) of the output shaft portions 31 can be made equal to each other.
- the common output shaft 661 has a mechanism mounting portion 661a, a pair of journal portions 661b, and four motor mounting portions 661c.
- the mechanism attachment portion 661a is provided at the central portion in the axial direction.
- the pair of journal portions 661b are disposed apart on both sides in the axial direction when viewed from the mechanism mounting portion 661a.
- the four motor attachment portions 661c are provided between the left end of the common output shaft 661 and the left journal portion 661b, between the left journal portion 661b and the mechanism attachment portion 661a, and between the mechanism attachment portion 661a and the right journal portion 661b. Are provided between the right journal portion 661b and the right end of the common output shaft 661.
- the mechanism housing portion 676 of the motor housing 671 of the electric motor case 616 has a drive side housing portion 678 and a driven side housing portion 679 similar to those in the first embodiment.
- the shaft accommodating portion 677 is provided so as to protrude to the left from the left wall of the driven side accommodating portion 679.
- the four motor accommodating portions 675 are provided so as to be aligned with the driving side accommodating portion 678 in the axial direction, and two are disposed on the left side of the driving side accommodating portion 678 and two are disposed on the right side.
- the two left motor accommodating portions 675 are aligned in the axial direction via the partition wall 680A, and the two right motor accommodating portions 675 are aligned in the axial direction via the partition wall 680B.
- the pair of journal portions 661b of the common output shaft 661 are rotatably supported by bearings 686 attached to the partition walls 680A and 680B. Then, the mechanism attachment portion 661a is accommodated in the drive side accommodation portion 678, and the four motor attachment portions 661c arranged in the axial direction are separately accommodated in the four motor accommodation portions 675.
- the rotor 51 of the electric motor 21 is spline fitted to each motor mounting portion 661c.
- the stator 56 of the first electric motor 21A is fastened to the left side surface of the left partition wall 680A
- the stator 56 of the second electric motor 21B is fastened to the right side surface of the left partition wall 680A.
- the stator 56 of the third electric motor 21C is fastened to the left side surface of the right partition 680B, and the stator 56 of the fourth electric motor 21D is fastened to the right side of the right partition 480B.
- the power unit 620 can be configured compactly in the radial direction of the electric motor.
- the four electric motors are provided on the same common output shaft, when the electric motor case is supported by the frame so that the common output shaft is directed in the vehicle width direction, in the longitudinal direction of the vehicle A heavy object is arranged at a position where the common output shaft is arranged. Therefore, by placing the common output shaft and the four electric motors, which are heavy objects, under the main frame and in front of the swing arm, the heavy objects can be disposed between the front wheels and the rear wheels. In addition, a low center of gravity can be achieved. Thereby, regardless of the weight of the power unit, it is possible to prevent a decrease in operability.
- the plurality of electric motors provided on the same common output shaft are arranged symmetrically with respect to a certain plane perpendicular to the axis of the common output shaft (that is, the rotation The openings of the child face each other or face opposite each other), but the plurality of electric motors may be arranged such that the openings are oriented in the same direction.
- FIG. 12 is a cross-sectional view showing the structure around the electric motor 21 of the power plant 720 according to the eighth embodiment of the present invention.
- a power unit 720 according to the present embodiment includes two electric motors including a first electric motor 21A and a second electric motor 21B, and the two electric motors are outer rotor type SPM motors similar to those in the first embodiment. It is.
- the output shaft portion 31A of the first electric motor 21A is independent of the output shaft portion 31B of the second electric motor 21B, and the output shaft portions 31A and 31B extend in parallel to each other.
- the electric circuit is designed so that the two electric motors 21A and 21B can be rotated in the opposite directions by the alternating current output from one inverter device 24 (see FIG. 3).
- the power transmission mechanism 720 includes these two output shaft portions 31A and 31B, a primary transmission mechanism 763, and a secondary transmission mechanism 765.
- the primary transmission mechanism 763 transmits the rotation of the output shaft portion 31B of the second electric motor 21B to the output shaft portion 31A of the first electric motor 21A without shifting.
- the secondary transmission mechanism 765 transmits the rotation of the output shaft portion 31A of the first electric motor 21A to the axle 3a of the rear wheel 3.
- the gear ratio of the primary transmission mechanism 763 is 1, the gear ratio with respect to the rear wheel 3 of the output shaft portion 31A is equal to the gear ratio with respect to the rear wheel 3 of the output shaft portion 31B.
- a gear mechanism is adopted as the primary transmission mechanism 763, and the primary transmission mechanism 763 meshes with the drive gear that rotates together with the output shaft portion 31B of the second electric motor 21B, and the first electric motor 21A.
- the output shaft portion 31A rotates with the driven gear.
- the primary transmission mechanism 763 can be made compact in the radial direction of the electric motor 21, and the distance between the two output shaft portions can be made as short as possible.
- an idle gear may be interposed between the drive gear and the driven gear, or a chain transmission mechanism or belt transmission may be provided in the primary transmission mechanism 763 instead of the gear mechanism.
- a mechanism may be employed.
- the swing arm 711 extending in the front-rear direction is used as a motor housing for housing the first electric motor 21A and the second electric motor 21B, and the electric motor case 716 includes the swing arm 711 and the swing arm 711.
- the motor cover 772 is provided on the outer side in the vehicle width direction.
- the swing arm 711 has a pair of partition walls 780A and 780B opposed to each other in the vehicle width direction, and the partition housing 780A and 780B constitute a mechanism housing portion 776 for housing the primary transmission mechanism 763.
- the output shaft portion 31A of the first electric motor 21A has a mechanism attachment portion 761a for attaching the primary driven element 763b of the primary transmission mechanism 763, a pair of journal portions 761b, and a single motor attachment portion 761c. ing.
- the pair of journal portions 761b are rotatably supported by bearings 786 attached to the partition walls 780A and 780B.
- the mechanism attachment portion 761a is accommodated together with the primary driven element 763b in the space between the partition walls 780A and 780B, and the motor attachment portion 761c is arranged so as to protrude from the left partition wall 780A to the left side.
- a spline groove 762 is formed in the motor attachment portion 761c, and the rotor 51 of the first electric motor 21A is spline fitted to the motor attachment portion 761c.
- the output shaft 31B of the second electric motor 21B is also connected to the swing arm 711 in the same manner as the output shaft 31A of the first electric motor 21A, except that the primary drive element 763a of the primary transmission mechanism 763 is attached to the mechanism attachment 761a. It is attached.
- the stators 56 of the first electric motor 21A and the second electric motor 21B are fastened to the inner surface of the motor cover 772 so as to be aligned in the front-rear direction.
- the two stators 56 can be placed on the inner peripheral side of the corresponding rotor 51.
- the right end portion of the output shaft portion 31A of the first electric motor 21A protrudes from the right partition 780B, and is disposed in the inner space in the vehicle width direction when viewed from the swing arm 711.
- the secondary drive element 765a of the secondary transmission mechanism 765 is attached to the right end portion of the output shaft portion 31A arranged in this way. For this reason, the secondary transmission mechanism 765 can be disposed closer to the center in the vehicle width direction, and the secondary transmission mechanism 765 can be satisfactorily damaged even if the electric motorcycle falls over to the side. Can be suppressed.
- the swing arm 711 includes a wiring 797 for supplying alternating current to the coils 32 of the first electric motor 21A and the second electric motor 21B.
- One end of the wiring is connected to the front side surface of the motor cover 722, and the wiring 797 extends from there to the inside of the swing arm 711, and the side surface on the center side in the vehicle width direction opposite to the mating surface of the pivot frame 10. Through the swing arm 711. By disposing the wiring 797 in this manner, disconnection can be satisfactorily prevented.
- the power unit according to the present invention is not limited to an electric motorcycle, and can be applied to other vehicles.
- the present invention can simplify the configuration of a power device for an electric vehicle including a plurality of electric motors, and is beneficial when applied to, for example, an electric motorcycle.
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Abstract
Description
図1は、本発明の第1実施形態に係る動力装置20を適用した電動二輪車1を右側から見た側面図である。図1に示すように、電動二輪車1は、前輪2及び後輪3を備えている。前輪2は、フロントフォーク4の下端部に回転可能に支持され、フロントフォーク4は、ステアリングシャフト(図示せず)を介してハンドル5と連結される。ハンドル5は、左右一対のグリップを有し、そのうち右側のグリップは、運転者により加減速要求が入力操作されるアクセルグリップ6である。
図5は、本発明の第2実施形態に係る動力装置120の電気的構成を模式的に示す概念図である。第1実施形態では、複数の電動機21のうち同一相のコイルを三相線40のうちの対応する配線に並列接続しているが、図5に示すように、同一相のコイルを直列に接続することも可能である。つまり、三相線140を成すU相線140U、V相線140V及びW相線140Wの一端を単一の中性点133にて星型結線し、U相線140U上に複数のU相コイル32Uを直列接続し、V相線140V上に複数のV相コイル32Vを直列接続し、W相線140W上に複数のW相コイル32Wを直列接続してもよい。このように電気的構成が変更されても、第1実施形態と同様にして、インバータ装置24と電動機21とを一対多の関係で設けつつ、各電動機21が互いの動作を干渉するのを良好に抑制することができる。
図6は、本発明の第3実施形態に係る動力装置220の電動機の周辺の構造を示す断面図である。図6に示すように、本実施形態に係る動力装置220は、第1電動機21A、第2電動機21B、第3電動機21C及び第4電動機21Dから成る4個の電動機を備え、全ての電動機21が第1実施形態と同様のアウタロータ型SPMモータである。
図8は、本発明の第4実施形態に係る動力装置320の電動機の周辺の構造を示す断面図である。図8に示すように、本実施形態に係る動力装置320は、第1電動機21A及び第2電動機21Bから成る2つの電動機を備え、2つの電動機21A,21Bは第1実施形態と同様のアウタロータ型SPMモータである。第1電動機21A及び第2電動機21Bの各出力軸部31は、1本の共通出力軸361を成している。動力伝達機構322は、この1本の共通出力軸361と、第1実施形態と同様の一次伝動機構63、中間軸64及び二次伝動機構65とを備え、各出力軸部31の後輪3(図1参照)に対する変速比が互いに等しくなっている。
図9は、本発明の第5実施形態に係る動力装置420の電動機の周辺の構造を示す断面図である。図9に示すように、本実施形態に係る動力装置420は、第4実施形態と同様にして、第1電動機21A及び第2電動機21Bから成る2つの電動機を備え、2つの電動機がアウタロータ型SPMモータであり、各出力軸部31が1本の共通出力軸361を成し、各回転子が一体の回転体351を成している。
図10は、本発明の第6実施形態に係る動力装置520の電動機の周辺の構造を示す断面図である。図10に示すように、本実施形態の動力装置520は、第1電動機21A及び第2電動機21Bから成る2つの電動機を備え、これら2つの電動機は第1実施形態と同様にしてアウタロータ型SPMモータである。第1電動機21A及び第2電動機21Bの各出力軸部31は、1本の共通出力軸561を成している。動力伝達機構522は、この1本の共通出力軸561と、第1実施形態と同様の一次伝動機構63、中間軸64及び二次伝動機構65を備えている。本実施形態においても、各出力軸部31の後輪3(図1参照)に対する変速比を互いに等しくすることができる。
図11は、本発明の第7実施形態に係る動力装置620の電動機の周辺の構造を示す断面図である。図11に示すように、本実施形態の動力装置620は、第1電動機21A、第2電動機21B、第3電動機21C及び第4電動機21Dから成る4つの電動機を備え、全ての電動機がアウタロータ型SPMモータである。4つの電動機21A,21B,21C,21Dの各出力軸部31は、1本の共通出力軸661を成している。動力伝達機構622は、この1本の共通出力軸661と、第1実施形態と同様の一次伝動機構63、中間軸64及び二次伝動機構65とを備えている。本実施形態においても、各出力軸部31の後輪(図1参照)に対する変速比を互いに等しくすることができる。
図12は、本発明の第8実施形態に係る動力装置720の電動機21の周辺の構造を示す断面図である。図12に示すように、本実施形態に係る動力装置720は、第1電動機21A及び第2電動機21Bから成る2つの電動機を備え、2つの電動機が第1実施形態と同様のアウタロータ型のSPMモータである。第1電動機21Aの出力軸部31Aは、第2電動機21Bの出力軸部31Bと独立しており、これら出力軸部31A,31Bは互いに平行に延在している。本実施形態においても、1つのインバータ装置24(図3参照)から出力される交流によって2つの電動機21A,21Bを互いに逆方向に回転させることができるように電気回路が設計されている。
3 後輪
12 スイングアーム
16 電動機ケース
20 動力装置
21 電動機
22 動力伝達機構
23 蓄電装置
24 インバータ装置
25 制御装置
31 出力軸部
32 三相コイル
34 バッテリ
51 回転子
55 永久磁石
56 固定子
61 共通出力軸
62 スプライン溝
63 一次伝動機構
64 中間軸
65 二次伝動機構
71 モータハウジング
72 モータカバー
75 モータ収容部
76 機構収容部
77 軸収容部
78 駆動側収容部
79 従動側収容部
Claims (9)
- 直流を蓄電する蓄電装置と、
前記蓄電装置に蓄電される直流から交流を生成するインバータ装置と、
前記インバータ装置により生成された交流の給電を受けて走行動力を発生する複数の電動機と、
前記複数の電動機の各出力軸部の回転を駆動輪に伝達する動力伝達機構と、を備え、
前記動力伝達機構が、前記各出力軸部が前記駆動輪に対し互いに同一の変速比で回転するように前記各出力軸部を互いに機械的に連結しており、
前記複数の電動機が、単一の前記インバータ装置と接続され、前記単一のインバータ装置が生成する交流の給電を受けるように構成されている、電動車両の動力装置。 - 前記複数の電動機のうち少なくとも2つの電動機の各出力軸部が、1本の共通出力軸を成しており、
前記動力伝達機構が、前記共通出力軸の回転を前記駆動輪に伝達するよう構成されている、請求項1に記載の電動車両の動力装置。 - 前記共通出力軸の回転を取り出す動力取出位置が、前記2つの電動機の間に配置されている、請求項2に記載の電動車両の動力装置。
- 前記複数の電動機の回転慣性が、互いに同じに設定されている、請求項2又は3に記載の電動車両の動力装置。
- 前記動力伝達機構に設けられ、前記共通出力軸と前記駆動輪との間で伝達される動力の急変を緩衝する緩衝手段を備える、請求項1乃至4のいずれか1項に記載の動力装置。
- 前記複数の電動機は、互いに同数相の多相巻線を有する多相交流電動機であり、
前記単一のインバータ装置は、前記多相巻線の相数に応じた多相交流を出力するための多相配線と接続され、
前記複数の電動機の同一相の巻線が前記多相配線に並列接続されている、請求項1乃至5のいずれか1項に記載の電動車両の動力装置。 - 前記電動機は、前記インバータ装置の給電によって軸線回りに回転する回転子を有し、前記回転子が前記共通出力軸とスプライン嵌合される、請求項2乃至6のいずれか1項に記載の電動車両の動力装置。
- 複数の前記共通出力軸が互いに平行に延在し、
前記動力伝達機構が、前記複数の共通出力軸と平行に延びる中間軸と、前記複数の共通出力軸の回転を互いに同一の変速比で前記中間軸に伝達する一次伝達機構と、を有する、請求項2乃至7のいずれか1項に記載の電動車両の動力装置。 - 前記各電動機が、
前記出力軸部上に固定されて前記出力軸部の外周面から半径方向に延びるフランジ部、及び前記フランジ部の外縁部から軸線方向に延びて前記出力軸部の外周面から半径方向に間隔をおいて配置される周壁部を有し、前記出力軸部とともに回転する回転子と、
前記回転子の前記周壁部の内周面に貼り合わされた永久磁石と、
円筒状に形成され、前記永久磁石と前記出力軸部の外周面との間に形成された円環状空間内に静置される固定子と、
前記固定子の外周面に固定され、前記永久磁石と半径方向に対向するコイルと、を備える、請求項1乃至8のいずれか1項に記載の電動二輪車。
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