WO2022172502A1 - 電動車両制御装置および電動車両制御装置の制御方法 - Google Patents
電動車両制御装置および電動車両制御装置の制御方法 Download PDFInfo
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- WO2022172502A1 WO2022172502A1 PCT/JP2021/036327 JP2021036327W WO2022172502A1 WO 2022172502 A1 WO2022172502 A1 WO 2022172502A1 JP 2021036327 W JP2021036327 W JP 2021036327W WO 2022172502 A1 WO2022172502 A1 WO 2022172502A1
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- 230000005540 biological transmission Effects 0.000 claims abstract description 121
- 239000007788 liquid Substances 0.000 claims abstract description 57
- 238000010792 warming Methods 0.000 claims abstract description 47
- 238000010438 heat treatment Methods 0.000 claims description 45
- 230000001172 regenerating effect Effects 0.000 claims description 8
- 230000008569 process Effects 0.000 description 12
- 230000006866 deterioration Effects 0.000 description 6
- 230000005611 electricity Effects 0.000 description 6
- 230000006870 function Effects 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
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- 230000007659 motor function Effects 0.000 description 1
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- 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
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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
- 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
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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
- B60L15/20—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
- B60L15/2045—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 optimising the use of energy
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- B60L7/10—Dynamic electric regenerative braking
- B60L7/16—Dynamic electric regenerative braking for vehicles comprising converters between the power source and the motor
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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
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- B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
- B60K17/354—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having separate mechanical assemblies for transmitting drive to the front or to the rear wheels or set of wheels
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- 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
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
- B60K17/356—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having fluid or electric motor, for driving one or more wheels
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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
- B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
- B60K2001/006—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units the electric motors
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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
- 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
- B60L2240/48—Drive Train control parameters related to transmissions
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- B—PERFORMING OPERATIONS; TRANSPORTING
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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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
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- B60Y2410/10—Housings
Definitions
- the present invention relates to an electric vehicle control device and a control method for an electric vehicle control device.
- a transmission is connected to the output shaft of the electric motor of the electric vehicle, and the transmission is connected to drive wheels of the vehicle.
- a transmission is composed of a large number of gears and has a liquid medium such as oil inside. When the temperature of the transmission is low, the viscosity of the liquid medium in the transmission increases and frictional force is applied to the gears.
- Patent Document 1 describes a hybrid vehicle that uses an engine and an electric motor as power sources, in which either a first electric motor or a second electric motor is used to generate power when a transmission that transmits engine power to wheels is in a cold state.
- a power cycle in which one motor functions as a motor and the other functions as a power source, and the electric power generated by one motor drives the other motor, causing the other generator to drive the other motor via the transmission.
- Techniques have been disclosed for creating conditions and thereby warming up the transmission.
- Patent Literature 1 does not consider an electric vehicle that runs using a plurality of electric motors as a drive source, and the electric power consumption of the electric vehicle worsens.
- An electric vehicle control device is an electric vehicle control device for controlling a vehicle running through a transmission connected to a plurality of electric motors as drive sources, the first transmission containing a liquid medium. and a controller for controlling a first electric motor and a second electric motor in contact with the second transmission, respectively, wherein the controller controls the first electric motor during a warming period for warming the first transmission or the second transmission.
- one of the second electric motors is driven and controlled with a powering torque obtained by increasing the warming torque to the required torque of the electric motor, and the other of the first electric motor or the second electric motor is controlled from the required torque of the electric motor. It is controlled by the torque which reduced the temperature torque.
- a control method for an electric vehicle control device is a control method for an electric vehicle control device for controlling a vehicle running through a transmission connected to a plurality of electric motors as drive sources, the transmission includes a first transmission and a second transmission each containing a liquid medium, the electric motor includes a first electric motor and a second electric motor in contact with the first transmission and the second transmission, respectively;
- a warming period in which the first transmission or the second transmission is heated one of the first electric motor and the second electric motor is driven and controlled with a power running torque obtained by increasing the required torque of the electric motor by the amount of warming.
- the other of the first electric motor and the second electric motor is controlled with a torque obtained by subtracting the warming torque from the required torque of the electric motor.
- the present invention it is possible to accelerate the heating of the liquid medium in the transmission and suppress the deterioration of the electricity consumption of the electric vehicle.
- FIG. 1 is a configuration diagram of an electric vehicle provided with an electric vehicle control device
- FIG. 3 is a cross-sectional view showing an example of a first electric motor and a first transmission
- FIG. 5 is a cross-sectional view showing another example of the first electric motor and the first transmission
- 4 is a flowchart showing processing operations of a controller
- It is a graph which shows the rotation speed of an electric motor, and the relationship of a maximum torque.
- 4A to 4E are graphs showing heating control of the electric motor;
- a processor for example, CPU, GPU
- storage resources for example, a memory
- an interface device for example, a communication port
- processing may be performed by a processor.
- a main body of processing executed by executing a program may be a controller having a processor, a device, a system, a computer, or a node.
- the subject of the processing performed by executing the program may be an arithmetic unit, and may include a dedicated circuit (for example, FPGA or ASIC) that performs specific processing.
- a program may be installed on a device such as a computer from a program source.
- the program source may be, for example, a program distribution server or a computer-readable storage medium.
- the program distribution server may include a processor and storage resources for storing the distribution target program, and the processor of the program distribution server may distribute the distribution target program to other computers.
- two or more programs may be implemented as one program, and one program may be implemented as two or more programs.
- FIG. 1 is a configuration diagram of an electric vehicle 1000 including an electric vehicle control device 100.
- Electric vehicle 1000 includes a first electric motor 201 and a second electric motor 202 that are driving sources.
- First electric motor 201 is coupled to front wheels 401 via first transmission 301 .
- Second electric motor 202 is coupled to rear wheel 501 via second transmission 302 .
- it has steering, accelerator, brake, and mechanisms for controlling them.
- the electric vehicle control device 100 includes a controller 101 , a first inverter 102 , a second inverter 103 , a battery 104 and a vehicle speed sensor 105 .
- a system required torque Tdem for the electric vehicle 1000 is externally input to the controller 101 according to the accelerator operation.
- first transmission 301 and second transmission 302 are provided with sensors for detecting the temperature of liquid medium such as oil in first transmission 301 and second transmission 302, respectively.
- the temperatures TH1 and TH2 are input to the controller 101 .
- the first electric motor 201 and the second electric motor 202 are each provided with a sensor for detecting the rotation speed, and the rotation speeds N1 and N2 are input to the controller 101 from each sensor. Controller 101 also detects the SOC (rate of charge) of battery 104 .
- the controller 101 appropriately distributes the system required torque Tdem to the required torque Tdem1 for the first electric motor 201 and the required torque Tdem2 for the second electric motor 202 .
- Controller 101 controls first inverter 102 and second inverter 103 according to required torques Tdem1 and Tdem2, temperatures TH1 and TH2, and rotational speeds N1 and N2 to drive or regenerate first electric motor 201 and second electric motor 202. to control.
- the first inverter 102 converts the DC power of the battery 104 into AC power and applies the AC current to the first electric motor 201 to drive the first electric motor 201 . Then, the front wheel 401 is rotated via the axle connected to the first electric motor 201 . During regeneration, the first electric motor 201 functions as a generator, and the AC power generated by the first electric motor 201 that is rotated by the rotational force of the front wheels 401 is converted into DC power by the first inverter 102 to power the battery 104. to charge.
- the first inverter 102 includes a power semiconductor element inside, and converts electric power by switching the power semiconductor element.
- the second inverter 103 converts the DC power of the battery 104 into AC power and applies the AC current to the second electric motor 202 to drive the second electric motor 202 . Then, the rear wheel 501 is rotated via the axle connected to the second electric motor 202 . Further, during regeneration, the second electric motor 202 functions as a generator, and the AC power generated by the second electric motor 202 that is rotated by the torque of the rear wheels 501 is converted into DC power by the second inverter 103, and the battery 104 to charge.
- the second inverter 103 has a power semiconductor element inside, and converts electric power by switching the power semiconductor element.
- the controller 101 increases one of the first electric motor 201 or the second electric motor 202 to the required torque during the heating period during which the first transmission 301 or the second transmission 302 is heated.
- Drive control is performed with the increased power running torque, and the other of the first electric motor 201 or the second electric motor 202 is regeneratively controlled with regenerative torque corresponding to the torque for heating.
- FIG. 2 is a cross-sectional view showing an example of the first electric motor 201 and the first transmission 301.
- the first electric motor 201 incorporates a rotor 231 , a stator 241 and a cooler 251 inside a housing 211 .
- Rotor 231 is fixed to rotating shaft 221 .
- Cooler 251 is provided in proximity to stator 241 to surround stator 241 and cools first electric motor 201 by circulating cooling water therein.
- the first electric motor 201 is provided with a sensor (not shown) for detecting the rotation speed of the rotor 231 .
- a first transmission 301 is provided in contact with the first electric motor 201 . That is, housing 211 of first electric motor 201 is in contact with housing 311 of first transmission 301 .
- the first transmission 301 incorporates a gear connected to the rotary shaft 221 of the first electric motor 201 and a plurality of gears 321 connected to this gear, and is finally connected to the output shaft 341 .
- the output shaft 341 is connected to the front wheels 401 via a clutch and an axle.
- a liquid medium 331 such as oil is provided in the first transmission 301 to lubricate the gear 321 .
- a sensor (not shown) for detecting the temperature of the liquid medium 331 is provided in the first transmission 301 .
- the temperature of the first transmission 301 When the temperature of the first transmission 301 is low, the viscosity of the liquid medium 331 increases and frictional force is applied to the gears. As a result, the electric power consumption of electric vehicle 1000 worsens.
- the heat of the first electric motor 201 which is provided in contact with the first transmission 301, is transmitted through the path HE1 through the rotating shaft 221 and through the path HE2 through the housing 211 by the control described later. .
- the temperature of the liquid medium 331 of the first transmission 301 is raised, and deterioration of the electricity consumption of the electric vehicle 1000 is suppressed.
- FIG. 2 shows an example of the first electric motor 201 and the first transmission 301
- the second electric motor 202 and the second transmission 302 have the same configuration.
- FIG. 3 is a cross-sectional view showing another example of the first electric motor 201 and the first transmission 301.
- FIG. 2 The difference from the example shown in FIG. 2 is that the liquid medium 331 is commonly distributed inside the first transmission 301 and the first electric motor 201 .
- the same reference numerals are given to the same parts as in FIG. 2 to simplify the description.
- the liquid medium 331 is also stored in the oil pans 361 and 261 provided in the first transmission 301 and the first electric motor 201, and is pumped from the first transmission 301 to the first electric motor 201 by a circulation pump (not shown) or natural circulation. Circulate inward. That is, since the first electric motor 201 and the first transmission 301 are in contact with each other, and the liquid medium 331 in the first transmission 301 flows through the first electric motor 201, the heat of the first electric motor 201 is Through the path HE1 through the shaft 221 and through the path HE3 through the liquid medium 331. As a result, the temperature of the liquid medium 331 of the first transmission 301 is raised, and deterioration of the electricity consumption of the electric vehicle 1000 is suppressed.
- FIG. 3 shows an example of the first electric motor 201 and the first transmission 301
- the second electric motor 202 and the second transmission 302 have the same configuration.
- a sensor is provided to detect the temperature of the liquid medium 331 in the second transmission 302 .
- FIG. 4 is a flow chart showing processing operations performed by the controller 101 executing the program.
- the controller 101 performs heating control for heating the liquid medium 331 by executing the processing operations of the flowchart shown in FIG.
- step S401 it is determined based on the vehicle speed sensor 105 whether the vehicle speed of the electric vehicle 1000 has exceeded a threshold value. When the electric vehicle 1000 has just started and the vehicle speed does not exceed the threshold value, the heating control of the first transmission 301 and the second transmission 302 is not performed. This is because the driving torques of both the first electric motor 201 and the second electric motor 202 are used to increase the starting force immediately after starting. If it is determined in step S401 that the vehicle speed exceeds the threshold, the process proceeds to step S402.
- step S402 the SOC (state of charge) of the battery 104 is detected, and it is determined whether the SOC exceeds the threshold. If the SOC of the battery 104 does not exceed the threshold, the heating control that imposes a load on the battery 104 is not performed, and the flow chart of FIG. 4 ends. If it is determined in step S402 that the SOC exceeds the threshold, the process proceeds to step S403.
- step S403 it is determined whether the temperature TH1 from the sensor that detects the temperature of the liquid medium 331 of the first transmission 301 is lower than the threshold. If determined to be low, the process proceeds to step S404.
- the temperature of the liquid medium 331 of the first transmission 301 is low, the viscosity of the liquid medium 331 becomes high, frictional force is applied to the gears of the first transmission 301, and the electric power consumption of the electric vehicle 1000 deteriorates. In order to suppress it, the liquid medium 331 is heated by the process of the following steps.
- step S404 the required torque Tdem1 distributed to the first electric motor 201 and the rotational speed N1 of the first electric motor 201 are obtained from the system required torque Tdem input according to the accelerator operation.
- the warming torque Twarm is calculated.
- This warming torque Twarm drives the first electric motor 201 with a torque higher than the required torque Tdem1, thereby increasing the heat of the first electric motor 201 and increasing the temperature of the liquid medium 331 of the first transmission 301 more quickly. It is the torque to make it higher.
- the warming torque Twarm may be calculated, for example, at a predetermined ratio of the required torque Tdem1, or may be a predetermined value.
- step S406 it is determined whether or not the torque obtained by adding the warming torque Twarm to the required torque Tdem1 exceeds the maximum torque of the first electric motor 201. Description will be made with reference to FIG.
- FIG. 5 is a graph showing the relationship between the number of rotations of the electric motor and the maximum torque.
- the horizontal axis is rotation speed, and the vertical axis is torque.
- the positive side of the vertical axis represents power running, and the negative side represents regeneration.
- a solid line indicates the maximum output of the first electric motor 201 and a dotted line indicates the maximum output of the second electric motor 202 .
- This example shows a case where the first electric motor 201 has a higher maximum output than the second electric motor 202 .
- the maximum output is constant up to the rotation speed Na, and decreases when the rotation speed Na is exceeded.
- step S406 it is determined that the torque obtained by adding the heating torque Twarm to the required torque Tdem1 exceeds the maximum torque of the first electric motor 201, the heating control is not performed, and the processing of FIG. 4 ends. do.
- step S406 if the torque obtained by adding the warming torque Twarm to the required torque Tdem1 does not exceed the maximum torque of the first electric motor 201, the process proceeds to step S407.
- step S407 the first electric motor 201 is driven with a torque obtained by adding the warming torque Twarm to the required torque Tdem1 of the first electric motor 201.
- FIG. As a result, the temperature of the liquid medium 331 of the first transmission 301 can be raised quickly.
- the second electric motor 202 is driven by subtracting the warming torque Twarm from the required torque Tdem2 distributed to the second electric motor 202.
- the required torque Tdem2 is zero
- the heating torque Twarm becomes the regenerative torque of the second electric motor 202, and the energy required for heating is recovered.
- the first electric motor 201 is driven and controlled with a power running torque obtained by increasing the warming torque Twarm to the required torque Tdem1, and the second electric motor 202 is regenerated with a regenerative torque corresponding to the warming torque Twarm. Control.
- the processing shown in FIG. 4 is repeatedly executed at predetermined time intervals. As a result, the temperature TH1 of the liquid medium 331 of the first transmission 301 rises. Then, when it is determined in step S403 that the temperature TH1 of the liquid medium 331 of the first transmission 301 is equal to or higher than the threshold value, the process proceeds to step S410. A period until the temperature TH1 of the liquid medium 331 of the first transmission 301 becomes equal to or higher than the threshold is referred to as a first heating period.
- step S410 it is determined whether the temperature TH2 from the sensor that detects the temperature of the liquid medium 331 of the second transmission 302 is lower than the threshold. If determined to be low, the process proceeds to step S411.
- the temperature of the liquid medium 331 of the second transmission 302 is low, the viscosity of the liquid medium 331 increases, frictional force is applied to the gears of the second transmission 302, and the electric power consumption of the electric vehicle 1000 deteriorates. In order to suppress it, the liquid medium 331 is heated by the process of the following steps.
- step S411 the required torque Tdem2 distributed to the second electric motor 202 and the rotational speed N2 of the second electric motor 202 are obtained from the system required torque Tdem input according to the accelerator operation.
- the warming torque Twarm is calculated.
- This warming torque Twarm drives the second electric motor 202 with a torque higher than the required torque Tdem2, thereby increasing the heat of the second electric motor 202 and increasing the temperature of the liquid medium 331 of the second transmission 302 more quickly. It is the torque to make it higher.
- the warming torque Twarm may be calculated, for example, at a predetermined ratio of the required torque Tdem2, or may be a predetermined value.
- step S413 it is determined whether or not the torque obtained by adding the warming torque Twarm to the required torque Tdem2 exceeds the maximum torque of the second electric motor 202.
- the heating control is not performed, and the process of FIG. 4 is terminated. If the maximum torque is not exceeded in step S413, the process proceeds to step S414.
- step S414 the second electric motor 202 is driven with a torque obtained by adding the warming torque Twarm to the required torque Tdem2 of the second electric motor 202. As a result, the temperature of the liquid medium 331 of the second transmission 302 can be raised quickly.
- the first electric motor 201 is driven by subtracting the warming torque Twarm from the required torque Tdem1 distributed to the first electric motor 201.
- the heating torque Twarm becomes the regenerative torque of the first electric motor 201 and recovers the energy required for heating.
- the second electric motor 202 is driven and controlled with a power running torque obtained by increasing the warming torque Twarm to the required torque Tdem2, and the first electric motor 201 is regenerated with a regenerative torque corresponding to the warming torque Twarm. Control.
- the process shown in FIG. 4 is repeatedly executed at predetermined time intervals, and the temperature TH2 of the liquid medium 331 of the second transmission 302 rises. Then, when it is determined in step S410 that the temperature TH2 of the liquid medium 331 of the second transmission 302 is equal to or higher than the threshold value, the process ends.
- a period until the temperature TH2 of the liquid medium 331 of the second transmission 302 becomes equal to or higher than the threshold is referred to as a second heating period. When the second heating period ends, the heating control shown in FIG. 4 ends.
- FIGS. 6(A) to 6(E) are graphs showing the heating control of the electric motor.
- 6(A) is the vehicle speed
- FIG. 6(B) is the required torque
- FIG. 6(C) is the torque applied to the electric motor
- FIG. 6(D) is the temperature of the liquid medium 331
- FIG. indicates the heating period.
- the horizontal axis in each figure is time.
- the electric vehicle 1000 is driven by normal control without heating control until time t1 when the vehicle speed of the electric vehicle 1000 does not exceed the threshold value V0. That is, the system required torque Tdem shown in FIG. 6B is distributed to the first electric motor 201 and the second electric motor 202 as shown in FIG.
- the first electric motor 201 When the vehicle speed exceeds the threshold value V0 at time t1, as shown in FIG. 6D, if the temperature of the liquid medium 331 is lower than the threshold value T0, the first electric motor 201 is turned on as described with reference to FIG. heating control. That is, as shown in FIG. 6C, the first electric motor 201 is driven with a torque M1 obtained by adding the warming torque Twarm to the required torque Tdem1 of the first electric motor 201 . As a result, the temperature T1 of the liquid medium 331 of the first transmission 301 rises, as shown in FIG. 6(D). On the other hand, as shown in FIG. 6C, the second electric motor 202 is subjected to regenerative control with a torque M2 after the torque Twarm for heating is subtracted. As shown in FIG. 6(D), the first heating period shown in FIG. 6(E) continues until the temperature of the liquid medium 331 of the first transmission 301 reaches or exceeds the threshold value T0.
- the second electric motor 202 may have a higher maximum output than the first electric motor 201 .
- the electric motor having a large maximum output is first subjected to heating control.
- the maximum output of the first electric motor 201 and the second electric motor 202 may be the same. In this case, either one may be heated and controlled first.
- two electric motors have been described as an example, four electric motors corresponding to the four wheels of electric vehicle 1000 may be provided. In this case, the motors are divided into two electric motors corresponding to the front wheels and two electric motors corresponding to the rear wheels, and the heating is controlled in the first heating period and the second heating period, respectively.
- the first electric motor 201 and the second electric motor 202 are heated and controlled in a predetermined order. Heating control may be performed from the electric motor 331 whose temperature is low. Also, if it is necessary to perform power running control with a plurality of electric motors, the heating control is not performed.
- the temperature of the liquid medium in the transmission is increased by the heat transferred from the electric motor, thereby suppressing deterioration of the electricity consumption of the electric vehicle.
- the electric vehicle control device 100 is an electric vehicle control device 100 that controls an electric vehicle 1000 that runs through a transmission connected to a plurality of electric motors as drive sources, and contains a liquid medium 331.
- a controller 101 is provided for controlling a first electric motor 201 and a second electric motor 202 that are in contact with a first transmission 301 and a second transmission 302, respectively.
- the controller 101 heats the first transmission 301 or the second transmission 302.
- one of the first electric motor 201 and the second electric motor 202 is driven and controlled with a power running torque obtained by increasing the warming torque Twarm to the required torques Tdem1 and Tdem2 of the electric motor, and the first electric motor 201 or the second electric motor
- the other of 202 is controlled by a torque obtained by subtracting the warming torque Twarm from the required torques Tdem1 and Tdem of the electric motor.
- the control method of the electric vehicle control device 100 is a control method of the electric vehicle control device 100 that controls the electric vehicle 1000 that runs through a transmission that is connected to a plurality of electric motors as drive sources,
- the transmission includes a first transmission 301 and a second transmission 302 respectively containing a liquid medium 331, and the electric motors are a first electric motor 201 and a second electric motor contacting the first transmission 301 and the second transmission 302 respectively.
- 202 during the heating period in which the first transmission 301 or the second transmission 302 is heated, one of the first electric motor 201 and the second electric motor 202 is increased to the required torques Tdem1 and Tdem by the heating amount torque Twarm.
- the drive is controlled by the power running torque, and the other of the first electric motor 201 or the second electric motor 202 is controlled by the required torques Tdem1 and Tdem minus the heating torque Twarm. As a result, it is possible to accelerate the heating of the liquid medium in the transmission and suppress the deterioration of the electricity consumption of the electric vehicle.
- the present invention is not limited to the above-described embodiments, and other forms conceivable within the scope of the technical idea of the present invention are also included in the scope of the present invention as long as the features of the present invention are not impaired. . Moreover, it is good also as a structure which combined the above-mentioned embodiment and several modifications.
- SYMBOLS 100... Electric vehicle control apparatus, 101... Controller, 102... 1st inverter, 103... 2nd inverter, 104... Battery, 105... Vehicle speed sensor, 201... 1st Electric motor 202 Second electric motor 211, 311 Case 221 Rotating shaft 231 Rotor 241 Stator 251 Cooler 301 Second 1 transmission, 302... 2nd transmission, 321... gear, 331... liquid medium, 341... output shaft, 401... front wheel, 501... rear wheel, 1000... Electric vehicle, Tdem, Tdem1, Tdem2 --- demand torque, Twarm --- heating torque, TH1, TH2 --- temperature, N1, N2 --- number of revolutions.
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Abstract
Description
本発明による電動車両制御装置の制御方法は、複数の電動機を駆動源として前記電動機に連結された変速機を介して走行する車両を制御する電動車両制御装置の制御方法であって、前記変速機は、液状媒体をそれぞれ内蔵する第1変速機および第2変速機を含み、前記電動機は、前記第1変速機および前記第2変速機にそれぞれ接する第1電動機および第2電動機を含み、前記第1変速機または前記第2変速機を加温する加温期間において、前記第1電動機または前記第2電動機の一方を、当該電動機の要求トルクに加温分トルクを増加した力行トルクで駆動制御し、前記第1電動機または前記第2電動機の他方を、当該電動機の要求トルクから前記加温分トルクを減じたトルクで制御する。
電動車両1000は、駆動源である第1電動機201および第2電動機202を備える。第1電動機201は、第1変速機301を介して前輪401と連結されている。第2電動機202は、第2変速機302を介して後輪501と連結されている。なお、図示省略しているが、ステアリング、アクセル、ブレーキやこれらを制御する機構を備えている。
コントローラ101には、アクセル操作に応じて電動車両1000に対するシステム要求トルクTdemが外部より入力される。また、第1変速機301および第2変速機302には、第1変速機301、第2変速機302内のオイルなどの液状媒体の温度を検出するセンサがそれぞれ設けられているが、各センサから温度TH1、TH2がコントローラ101に入力される。さらに、第1電動機201および第2電動機202には、回転数を検出するセンサがそれぞれ設けられているが、各センサから回転数N1、N2がコントローラ101に入力される。また、コントローラ101は、バッテリ104のSOC(充電率)を検出する。
第1電動機201は、筐体211内に、ロータ231、ステータ241、冷却器251を内蔵している。ロータ231は回転軸221に固定される。冷却器251は、ステータ241に近接してステータ241を囲んで設けられ、内部に冷却水を流通して第1電動機201を冷却する。第1電動機201には、図示省略したがロータ231の回転数を検出するセンサが設けられている。
ステップS401では、車速センサ105に基づいて電動車両1000の車速が閾値を超えたかを判定する。電動車両1000は発進直後で車速が閾値を超えていない場合は、第1変速機301および第2変速機302の加温制御は行わない。発進直後は、第1電動機201および第2電動機202の両方の駆動トルクを用いて発進力を高めるためである。ステップS401で車速が閾値を超えたと判定された場合は、ステップS402へ進む。
ステップS407では、第1電動機201の要求トルクTdem1に加温分トルクTwarmを加算したトルクで、第1電動機201を駆動する。これにより、第1変速機301の液状媒体331の温度を早く高めることができる。
(1)電動車両制御装置100は、複数の電動機を駆動源として電動機に連結された変速機を介して走行する電動車両1000を制御する電動車両制御装置100であって、液状媒体331を内蔵する第1変速機301および第2変速機302にそれぞれ接する第1電動機201および第2電動機202を制御するコントローラ101を備え、コントローラ101は、第1変速機301または第2変速機302を加温する加温期間において、第1電動機201または第2電動機202の一方を、当該電動機の要求トルクTdem1、Tdem2に加温分トルクTwarmを増加した力行トルクで駆動制御し、第1電動機201または第2電動機202の他方を、当該電動機の要求トルクTdem1、Tdemから加温分トルクTwarmを減じたトルクで制御する。これにより、変速機内の液状媒体の加温を促進し、電動車両の電費の悪化を抑制することができる。
Claims (7)
- 複数の電動機を駆動源として前記電動機に連結された変速機を介して走行する車両を制御する電動車両制御装置であって、
液状媒体を内蔵する第1変速機および第2変速機にそれぞれ接する第1電動機および第2電動機を制御するコントローラを備え、
前記コントローラは、前記第1変速機または前記第2変速機を加温する加温期間において、前記第1電動機または前記第2電動機の一方を、当該電動機の要求トルクに加温分トルクを増加した力行トルクで駆動制御し、前記第1電動機または前記第2電動機の他方を、当該電動機の要求トルクから前記加温分トルクを減じたトルクで制御する電動車両制御装置。 - 請求項1に記載の電動車両制御装置において、
前記コントローラは、前記第1変速機または前記第2変速機を加温する加温期間において、前記第1電動機または前記第2電動機の一方を前記力行トルクで駆動制御し、前記第1電動機または前記第2電動機の他方を前記加温分トルクに相当する回生トルクで回生制御する電動車両制御装置。 - 請求項1または請求項2に記載の電動車両制御装置において、
前記コントローラは、前記車両の速度が所定閾値を超えた後に前記加温期間を開始する電動車両制御装置。 - 請求項3に記載の電動車両制御装置において、
前記コントローラは、前記第1電動機および前記第2電動機に電力を供給するバッテリの充電率が所定閾値を超えている場合に前記加温期間を開始する電動車両制御装置。 - 請求項4に記載の電動車両制御装置において、
前記コントローラは、前記液状媒体の温度が所定閾値より低い場合に前記加温期間を開始する電動車両制御装置。 - 請求項1または請求項2に記載の電動車両制御装置において、
前記加温期間は、第1加温期間と第2加温期間よりなり、
前記コントローラは、前記第1変速機内の前記液状媒体の温度が所定閾値より低く、且つ前記車両の速度が所定閾値を超えた場合に、前記第1加温期間を開始して、前記第1電動機より伝達された熱により前記第1変速機内の前記液状媒体の温度を上昇させ、前記第2変速機内の前記液状媒体の温度が所定閾値より低く、且つ前記車両の速度が所定閾値を超えた場合に、前記第2加温期間を開始して、前記第2電動機より伝達された熱により前記第2変速機内の前記液状媒体の温度を上昇させる電動車両制御装置。 - 複数の電動機を駆動源として前記電動機に連結された変速機を介して走行する車両を制御する電動車両制御装置の制御方法であって、
前記変速機は、液状媒体をそれぞれ内蔵する第1変速機および第2変速機を含み、
前記電動機は、前記第1変速機および前記第2変速機にそれぞれ接する第1電動機および第2電動機を含み、
前記第1変速機または前記第2変速機を加温する加温期間において、前記第1電動機または前記第2電動機の一方を、当該電動機の要求トルクに加温分トルクを増加した力行トルクで駆動制御し、前記第1電動機または前記第2電動機の他方を、当該電動機の要求トルクから前記加温分トルクを減じたトルクで制御する電動車両制御装置の制御方法。
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JP2011027246A (ja) * | 2009-07-29 | 2011-02-10 | Ntn Corp | 電気自動車用変速機の暖機装置 |
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