WO2022141242A1 - 一种控制方法和装置 - Google Patents

一种控制方法和装置 Download PDF

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Publication number
WO2022141242A1
WO2022141242A1 PCT/CN2020/141597 CN2020141597W WO2022141242A1 WO 2022141242 A1 WO2022141242 A1 WO 2022141242A1 CN 2020141597 W CN2020141597 W CN 2020141597W WO 2022141242 A1 WO2022141242 A1 WO 2022141242A1
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WIPO (PCT)
Prior art keywords
rotational speed
oil pump
loss
speed
motor
Prior art date
Application number
PCT/CN2020/141597
Other languages
English (en)
French (fr)
Inventor
马文武
曹毅
任毛杰
张劲松
Original Assignee
华为数字能源技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为数字能源技术有限公司 filed Critical 华为数字能源技术有限公司
Priority to CN202080103239.5A priority Critical patent/CN115885119A/zh
Priority to PCT/CN2020/141597 priority patent/WO2022141242A1/zh
Priority to EP20967583.4A priority patent/EP4253802A4/en
Publication of WO2022141242A1 publication Critical patent/WO2022141242A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0409—Features relating to lubrication or cooling or heating characterised by the problem to increase efficiency, e.g. by reducing splash losses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0412—Cooling or heating; Control of temperature
    • F16H57/0415—Air cooling or ventilation; Heat exchangers; Thermal insulations
    • F16H57/0417—Heat exchangers adapted or integrated in the gearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
    • F16H57/0441—Arrangements of pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0447—Control of lubricant levels, e.g. lubricant level control dependent on temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0457—Splash lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0467—Elements of gearings to be lubricated, cooled or heated
    • F16H57/0476—Electric machines and gearing, i.e. joint lubrication or cooling or heating thereof

Definitions

  • the present application relates to the field of control, and in particular, to a control method and device.
  • the electric drive assembly is the core component of new energy vehicles, and the pursuit of high efficiency of the electric drive assembly has become the mainstream development demand and trend.
  • the improvement of the efficiency of the electric drive assembly system can improve the cruising range of the whole vehicle, and the cruising range is one of the most important performance indicators of new energy vehicles.
  • an electronic oil pump is usually used to cool and actively lubricate the motor and the reducer.
  • the function of the electronic oil pump is to send the lubricating oil to the friction parts of the motor, so that the lubricating oil circulates in the lubricating circuit to ensure that the motor is well cooled and lubricated. .
  • the embodiments of the present application provide a control method and device, which can control the rotational speed of the oil pump to be a third rotational speed according to the first rotational speed of the motor, the second rotational speed of the oil pump, and the temperature of the lubricating oil.
  • the rotational speed of the oil pump can be adjusted by adjusting the rotational speed of the oil pump, the height of the lubricating oil level in the casing can be actively controlled, and the fluid level of the lubricating oil inside the casing and the power of the oil pump can be changed under different oil pump rotational speeds, thereby effectively improving the efficiency of the assembly.
  • an embodiment of the present application provides a control method, which is applied to an electric drive system.
  • the electric drive system includes an oil pump, a motor, a reducer, and a casing.
  • the motor and the reducer are arranged in the casing, and a lubricant is stored in the casing.
  • Oil, the oil pump is used to pump the lubricating oil
  • the method includes: obtaining the first rotational speed of the motor, the second rotational speed of the oil pump and the temperature of the lubricating oil in the casing; controlling the oil pump according to the first rotational speed, the second rotational speed and the temperature
  • the rotational speed is the third rotational speed.
  • controlling the rotational speed of the oil pump to be the third rotational speed according to the first rotational speed, the second rotational speed and the temperature includes: determining a correlation relationship corresponding to the temperature according to the temperature, and the correlation relationship includes the rotational speed of the motor and the rotational speed of the oil pump. Correlation relationship with the loss; determine the first loss corresponding to the first rotational speed and the second rotational speed in the correlation relationship; control the rotational speed of the oil pump to be the third rotational speed according to the first loss and the correlation relationship.
  • the embodiment of the present application can control the rotational speed of the oil pump through the correlation between the rotational speed of the motor, the rotational speed of the oil pump and the loss, so that the rotational speed of the oil pump can be controlled more accurately, thereby effectively improving the overall efficiency.
  • controlling the rotational speed of the oil pump to be the third rotational speed according to the first loss and the correlation relationship includes: determining a plurality of second losses corresponding to the first rotational speed in the correlation relationship; In the case of less than the first loss, the rotational speed of the oil pump is adjusted to be the third rotational speed, where the third rotational speed is the rotational speed of the oil pump corresponding to one of the second losses. In the embodiment of the present application, the rotational speed of the oil pump is adjusted to the rotational speed corresponding to the smaller loss, so that the assembly efficiency can be effectively improved.
  • adjusting the rotational speed of the oil pump to the third rotational speed includes: adjusting the oil pump when the plurality of second losses are smaller than the first losses
  • the rotational speed of is the third rotational speed, wherein the third rotational speed is the oil pump rotational speed corresponding to the lowest loss among the plurality of second losses.
  • the loss includes: oil churning loss and oil pump power consumption; wherein, the oil churning loss is the power loss caused by the liquid resistance caused by the rotation of the reducer gear in the lubricating oil in the casing.
  • the motor speed, the oil pump speed and the loss are a continuous functional relationship.
  • multiple second losses corresponding to the first rotational speed can be determined more accurately, so that the rotational speed of the oil pump can be adjusted to the rotational speed corresponding to the lowest loss, and the overall efficiency can be improved more effectively.
  • an embodiment of the present application provides a control device, which is applied to an electric drive system.
  • the electric drive system includes an oil pump, a motor, a reducer, and a casing.
  • the motor and the reducer are arranged in the casing, and a lubricant is stored in the casing.
  • Oil, oil pump is used to pump lubricating oil.
  • the control device may be a terminal device, or may be a chip or a chip system in the terminal device.
  • the control device may comprise a processing unit.
  • the processing unit may be a processor.
  • the control device may further include a storage unit, which may be a memory.
  • the storage unit is used for storing instructions, and the processing unit executes the instructions stored in the storage unit, so that the terminal device implements a control method described in the first aspect or any possible implementation manner of the first aspect.
  • the control device is a chip or a chip system in the terminal device
  • the processing unit may be a processor.
  • the processing unit executes the instructions stored in the storage unit, so that the terminal device implements a control method described in the first aspect or any possible implementation manner of the first aspect.
  • the storage unit may be a storage unit in the chip (for example, a register, a cache, etc.), or a storage unit in the terminal device located outside the chip (for example, a read-only memory, a random access memory, etc.)
  • the processing unit is used to obtain the first rotational speed of the motor, the second rotational speed of the oil pump and the temperature of the lubricating oil in the casing; the processing unit is also used to control the oil pump according to the first rotational speed, the second rotational speed and the temperature.
  • the rotational speed is the third rotational speed.
  • the processing unit is further configured to determine the correlation relationship corresponding to the temperature according to the temperature, and the correlation relationship includes the correlation relationship between the motor speed, the oil pump speed and the loss; The first loss corresponding to the first rotation speed and the second rotation speed is determined in the relationship; the processing unit is further configured to control the rotation speed of the oil pump to be the third rotation speed according to the first loss and the correlation relationship.
  • the processing unit is further configured to determine a plurality of second losses corresponding to the first rotational speed in the correlation relationship; in the case where one of the second losses is smaller than the first loss, adjust the rotational speed of the oil pump is the third rotational speed, wherein the third rotational speed is the rotational speed of the oil pump corresponding to one of the second losses.
  • the processing unit is further configured to: in the case that the plurality of second losses are smaller than the first losses, adjust the rotational speed of the oil pump to be a third rotational speed, where the third rotational speed is a plurality of second losses The oil pump speed corresponding to the lowest loss among the losses.
  • the loss includes: oil churning loss and oil pump power consumption; wherein, the oil churning loss is the power loss caused by the liquid resistance caused by the rotation of the reducer gear in the lubricating oil in the casing.
  • the motor speed, the oil pump speed and the loss are a continuous functional relationship.
  • an embodiment of the present application provides a control apparatus, including: a processor configured to invoke a program in a memory to implement the first aspect or any control method in any possible implementation manner of the first aspect.
  • the present application further provides a powertrain, comprising the second aspect or any control device in any possible implementation manner of the second aspect, the powertrain further comprising: an inverter, a motor, and a reducer .
  • the inverter is used to convert the direct current into alternating current and then transmit it to the motor;
  • the motor is used to convert the alternating current into mechanical energy to drive the vehicle;
  • the reducer is used to convert the output speed of the motor shaft of the motor.
  • the present application further provides a vehicle, including the powertrain of the fourth aspect and a power battery pack, where the power battery pack is used to provide DC power for an inverter.
  • an embodiment of the present application provides a chip, including: a processor and an interface circuit, where the interface circuit is used to communicate with other devices, and the processor processor is used to run a computer program or instruction to perform any implementation of the first aspect The control method described in any of the above.
  • the communication interface in the chip may be an input/output interface, a pin, a circuit, or the like.
  • the chip or chip system described above in this application further includes at least one memory, where instructions are stored in the at least one memory.
  • the memory may be a storage unit inside the chip, such as a register, a cache, etc., or a storage unit of the chip (eg, a read-only memory, a random access memory, etc.).
  • an embodiment of the present application provides a computer-readable storage medium, where a computer program or instruction is stored in the computer-readable storage medium, and when the computer program or instruction is run on a computer, the computer is made to execute any one of the first aspect.
  • FIG. 1 is a schematic diagram of a water-cooled motor electric drive assembly provided by an embodiment of the present application
  • FIG. 2 is a schematic diagram of the oil churning situation of the reducer when a water cooling method is used to dissipate heat according to an embodiment of the present application;
  • FIG. 3 is a schematic diagram of an oil-cooled motor electric drive assembly provided by an embodiment of the application.
  • FIG. 4 is a schematic diagram of an electric drive assembly system provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a basic structure inside a motor according to an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of a control method provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of obtaining a first rotational speed of a motor according to an embodiment of the present application.
  • FIG. 8 is a schematic flowchart of a control method provided by an embodiment of the present application.
  • FIG. 9 is a schematic flowchart of a control method provided by an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a control device provided by an embodiment of the application.
  • FIG. 11 is a schematic structural diagram of a powertrain provided by an embodiment of the application.
  • FIG. 12 is a schematic structural diagram of a vehicle according to an embodiment of the application.
  • FIG. 13 is a schematic structural diagram of a chip provided by an embodiment of the present application.
  • words such as “first” and “second” are used to distinguish the same or similar items with basically the same function and effect.
  • the first rotational speed and the second rotational speed are only used to distinguish the rotational speeds of the oil pump and the motor, and do not limit their order.
  • the words “first”, “second” and the like do not limit the quantity and execution order, and the words “first”, “second” and the like are not necessarily different.
  • At least one means one or more
  • plural means two or more.
  • And/or which describes the association relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, which can indicate: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects are an “or” relationship.
  • At least one item(s) below” or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s).
  • At least one (a) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c may be single or multiple .
  • the electric drive assembly system may include: a motor controller, a motor and a reducer.
  • the efficiency loss of each part will affect the efficiency of the electric drive assembly system, thereby affecting the cruising range of the vehicle.
  • the oil churning loss of the reducer gear is an important part of the efficiency loss of the electric drive assembly system.
  • the commonly used motor cooling methods can include water cooling and oil cooling.
  • FIG. 1 is a schematic diagram of an electric drive assembly of a water-cooled motor.
  • the stator of the motor uses cooling liquid (eg, antifreeze) for heat dissipation
  • the reducer uses lubricating oil for lubrication.
  • heat is removed from the motor by using a water pump to drive the coolant to speed up the flow.
  • the lubricating oil is located in the casing, and the reducer uses the main reduction gear to churning oil to splash and lubricate the gears and bearings.
  • Figure 2 is a schematic diagram of the oil churning of the reducer when water cooling is used for heat dissipation.
  • the reducer consists of several gears. , shaft and bearings and other parts, the gear part of the reducer is immersed in the oil pool, and the lubricating oil is brought to the meshing tooth surface through the rotation of the gear for lubrication.
  • the depth of the gear immersion in the oil pool should not be too deep.
  • the depth of the gear immersion in the oil pool can be a quarter of the gear radius.
  • the distance between the top of the main reduction gear and the bottom of the casing can be greater than 5mm, to avoid the sludge or debris at the bottom of the oil pool covering the gear meshing surface and aggravating friction.
  • Figure 3 shows a schematic diagram of using oil cooling to dissipate heat from the motor.
  • an electronic oil pump can be used to pump out the lubricating oil in the casing to achieve cooling and active lubrication of the motor and the reducer. .
  • the embodiment of the present application provides a control method, which can effectively improve the assembly efficiency by adjusting the rotational speed of the oil pump to change the lubricating oil level in the cavity and the power of the oil pump under different rotational speeds of the oil pump. .
  • the control methods provided in the embodiments of the present application can be applied to the powertrain system shown in FIG. 4 .
  • the powertrain system 400 may include an oil pump 401 , a motor 402 , a speed reducer 403 and a casing 404 .
  • the motor 402 and the reducer 403 are arranged in the casing 404 , the casing stores lubricating oil, and the oil pump 401 is used to pump the lubricating oil to realize cooling and lubrication of the motor 402 and the reducer 403 .
  • the motor 402 is an electromagnetic device that realizes electric energy conversion or transmission according to the law of electromagnetic induction, and its main function is to generate driving torque to generate power for electrical appliances or various machines.
  • the motor 402 can be applied to electric vehicles, for example, pure electric vehicles, extended-range electric vehicles, hybrid electric vehicles, fuel cell vehicles, new energy vehicles, and the like.
  • FIG. 5 shows a schematic diagram of the internal structure of a motor.
  • the motor 500 mainly includes: a stator 510 , a rotating shaft 540 , a rotor 550 , a housing 560 , a front end cover 570 , a rear end cover 580 and a motor bearing 590 .
  • the stator 510 is wound with a stator winding, and when the stator winding is wound, its two ends will extend outward from both ends of the stator core to form ends 5301 and 5302 of the stator winding.
  • the inner walls of the casing 560, the front end cover 570 and the rear end cover 580 form a cavity, and the cavity is provided with a stator 510, a rotor 550 and a rotating shaft 540 in sequence from the outer ring to the inner ring. That is to say, the rotor 550 is placed outside the rotating shaft 540 , and the setter 510 is placed on the rotor 550 .
  • the stator 510 is fixed in the casing 560 , and the rotor 550 drives the rotating shaft 540 to rotate.
  • Both ends of the rotating shaft 540 are rotatably connected to the two opposite side end faces (the front end cover 570 and the rear end cover 580 ) of the housing 560 through the motor bearing 590 respectively, and one end of the shaft 540 can also be connected to the input shaft gear of the reducer from one side end face.
  • the reducer 403 includes a parallel shaft gear reduction mechanism and a planetary gear reduction mechanism, and the input gear of each parallel shaft gear reduction mechanism is connected with a motor 402, and the output gear is connected with a driving member of a planetary gear reduction mechanism, and each planetary gear is reduced in speed
  • the follower of the mechanism is connected to a power take-off shaft. Since the gears in the parallel shaft gear reduction mechanism are less difficult to process at the same speed, the parallel shaft gear reduction mechanism is directly connected to the drive motor, and then the planetary gear reduction mechanism is connected to the parallel shaft gear reduction mechanism. The speed of the gear reduction mechanism, thereby reducing the requirements for the gear machining accuracy of the planetary gear reduction mechanism.
  • FIG. 6 is a schematic flowchart of a control method provided by an embodiment of the present application, and the method is applicable to the powertrain system corresponding to FIG. 4 above.
  • a control method provided by an embodiment of the present application may include the following steps:
  • S601 Obtain the first rotational speed of the motor, the second rotational speed of the oil pump, and the temperature of the lubricating oil in the casing.
  • the first rotational speed of the motor is the rotational speed of the rotor of the motor.
  • the first rotational speed of the motor may be acquired through a photoelectric sensor.
  • the photoelectric sensor may include a projection photoelectric sensor or a reflective photoelectric sensor.
  • a schematic diagram of using a projected photoelectric sensor to acquire the first rotational speed of the motor is shown in FIG. 7 .
  • Install a test disk on the motor shaft of the electric vehicle under test for example, a toothed disk or a hole disk, and the disk has Z uniform tooth slots or round holes. Wherein, Z can be 60 or an integer multiple of 60.
  • the light beam passes through the slot or the small hole, it is projected on the photodiode to generate an electrical signal.
  • the photodiode has no signal, so the frequency of the pulse signal generated by the photodiode is proportional to the motor speed. .
  • the temperature of the lubricating oil in the casing may be acquired by a temperature sensor.
  • first rotational speed of the motor the second rotational speed of the oil pump and the temperature of the lubricating oil in the casing can also be acquired in any possible form, and the specific manner of acquisition is not limited in the embodiments of the present application.
  • S602 Control the rotational speed of the oil pump to be a third rotational speed according to the first rotational speed, the second rotational speed and the temperature.
  • the first rotational speed, the second rotational speed and the temperature may be input into the pre-trained model, and the obtained output result is the third rotational speed of the oil pump.
  • the first rotational speed, the second rotational speed and the temperature may be input into a pre-obtained calculation formula, and the third rotational speed of the oil pump can be obtained through calculation.
  • the height of the lubricating oil level in the casing can be actively controlled by adjusting the rotational speed of the oil pump, and the fluid level of the lubricating oil inside the cavity and the power of the oil pump can be changed under different rotational speeds of the oil pump, thereby effectively improving the assembly efficiency .
  • S602 includes:
  • S801 Determine a correlation relationship corresponding to the temperature according to the temperature, and the correlation relationship includes the correlation relationship between the motor speed, the oil pump speed and the loss.
  • the losses may be aggregate losses.
  • the assembly loss can include: motor loss, bearing loss, oil churning loss and oil pump power consumption.
  • the oil churning loss is related to the liquid level of the lubricating oil in the casing, and the power consumption of the oil pump is related to the speed of the oil pump.
  • the losses may include one or more of the total losses.
  • the association relationship may be prior knowledge.
  • the prior knowledge may be a table established by testing the relationship between different oil pump speeds and motor speeds and corresponding losses under different oil temperatures. By querying the table, the correlation relationship corresponding to the obtained lubricating oil temperature is obtained.
  • association relationship in the embodiment of the present application may also be a column graph or a broken line graph, or other forms of expression, which are not specifically limited in the embodiment of the present application.
  • S802 Determine the first loss corresponding to the first rotational speed and the second rotational speed in the association relationship.
  • the first loss may be an assembly loss corresponding to the first rotational speed and the second rotational speed, or the first loss may include one or more of assembly losses.
  • the first loss corresponding to the first rotational speed and the second rotational speed may be determined by querying a table.
  • the table established by the relationship between different oil pump rotational speeds and motor rotational speeds and corresponding losses can be tested. Understandably, four tables can be obtained.
  • the first speed and the second speed corresponding to the first speed in the table can be determined by querying the relationship between different oil pump speeds and motor speeds and the corresponding losses when the oil temperature is 30°C. loss.
  • a plurality of loss values corresponding to the first rotational speed are determined, and among the plurality of loss values Determine if there is a loss value smaller than the first loss.
  • the third rotational speed is a rotational speed corresponding to one of the loss values smaller than the first loss.
  • a plurality of loss values corresponding to the first rotational speed are determined. Determine whether there is a loss value smaller than the first loss among the multiple loss values, and adjust the oil pump rotational speed to one of the multiple loss values smaller than the first loss when there are multiple loss values smaller than the first loss The speed corresponding to the lowest loss.
  • the rotational speed of the oil pump is controlled to remain unchanged, and it can be understood that the third rotational speed is the same as the second rotational speed.
  • the rotational speed of the oil pump can be controlled by the relationship between the rotational speed of the motor, the rotational speed of the oil pump and the loss, so that the rotational speed of the oil pump can be adjusted more accurately, thereby effectively improving the overall efficiency.
  • the losses include: oil churning losses and oil pump power consumption.
  • the churning loss is the power loss caused by the liquid resistance caused by the rotation of the reducer gear in the lubricating oil of the casing.
  • the power consumption of the oil pump is related to the speed of the oil pump. For example, the faster the speed of the oil pump, the greater the power consumption of the oil pump; the smaller the speed of the oil pump, the greater the power consumption of the oil pump.
  • the churning loss is related to the liquid level of the lubricating oil of the casing
  • the liquid level of the lubricating oil of the casing is related to the rotational speed of the oil pump. For example, the faster the oil pump rotates, the more lubricating oil is pumped, the less oil in the lubricating oil of the casing, and the lower the liquid level, which causes the gear of the reducer to rotate in the lubricating oil of the casing and is caused by the liquid resistance.
  • the smaller the power loss the smaller the corresponding churning loss.
  • the rotational speed of the oil pump is adjusted according to the first rotational speed of the motor and the oil temperature of the lubricating oil, the oil amount of the lubricating oil in the cavity of the motor reducer can be changed, and the height of the oil churning liquid level can be adjusted, thereby controlling the oil churning loss and the The sum of the power consumption of the oil pump is the smallest. In this way, the loss of the assembly can be reduced and the efficiency of the assembly can be improved.
  • S803 includes:
  • S901 Determine a plurality of second losses corresponding to the first rotational speed in the association relationship.
  • the association relationship may be prior knowledge.
  • the prior knowledge may be a table established by testing the relationship between different oil pump speeds and motor speeds and corresponding losses under different oil temperatures. By querying the table, a plurality of second losses corresponding to the first rotational speed are determined in the correlation relationship. Among them, losses include: churning losses and oil pump power consumption.
  • the third rotational speed is the rotational speed of the oil pump corresponding to the one of the second losses.
  • Table 1 is a table based on the relationship between different oil pump rotational speeds and motor rotational speeds and corresponding losses when the oil temperature is 40°C.
  • the first rotational speed is 300
  • the second rotational speed is 500
  • the first loss corresponding to the first rotational speed and the second rotational speed is 134.9195812
  • the corresponding first rotational speed is 134.9195812.
  • the multiple second losses are 137.4877539, 136.7111623, 129.3901122, and 149.8224251.
  • one of the second losses 129.3901122 among the plurality of second losses is smaller than the first loss
  • the third rotational speed is the oil pump rotational speed 1500 corresponding to the second loss 129.3901122.
  • the first rotational speed is 300
  • the second rotational speed is 1000
  • the first loss corresponding to the first rotational speed and the second rotational speed is 136.7111623
  • the corresponding first rotational speed is 136.7111623.
  • the multiple second losses are 137.4877539, 134.9195812, 129.3901122, and 149.8224251, respectively.
  • the second loss 129.3901122 and 134.9195812 are both smaller than the first loss
  • the third speed is the oil pump speed 1500 corresponding to the second loss 129.3901122
  • the third speed is the oil pump speed 500 corresponding to the second loss 134.9195812.
  • the cooling and lubrication requirements of the assembly system can be guaranteed.
  • the rotational speed of the oil pump is adjusted to a rotational speed lower than the second rotational speed, the amount of oil pumped by the oil pump is reduced, which may cause a problem that the cooling and lubrication requirements cannot be met. Therefore, in order to ensure the cooling and lubrication requirements of the assembly system, the third rotational speed can be adjusted so that the rotational speed of the oil pump corresponding to the second loss is not less than the rotational speed of the oil pump corresponding to the second rotational speed. In this way, the assembly efficiency can be effectively improved on the premise of meeting the cooling and lubrication requirements of the assembly system.
  • the first rotation speed corresponding to the first rotation speed and the second rotation speed can be determined by looking up the table.
  • the loss is 242.16, and the multiple second losses corresponding to the first rotational speed are 254.7495079, 242.3020135, 213.3399312, and 262.8393466, respectively.
  • the second loss 129.3901122 is less than the first loss
  • the oil pump speed 1500 corresponding to the second loss 213.3399312 is not less than the second speed 500
  • the third speed is the second loss 213.3399312 The corresponding oil pump speed 1500.
  • the obtained lubricating oil temperature is 40°C
  • the first rotational speed is 100
  • the second rotational speed is 500
  • the multiple second losses are 14.88473822, 19.75720568, 21.43655737, and 23.62649258.
  • the second loss 14.88473822 is smaller than the first loss, but the oil pump speed 0 corresponding to the second loss 14.88473822 is less than the second speed 500, so the oil pump keeps the original second speed unchanged.
  • a plurality of second losses corresponding to the first rotational speed are determined in the correlation relationship, and in the case that one of the second losses is smaller than the first loss, the rotational speed of the oil pump is adjusted to the rotational speed of the oil pump corresponding to one of the second losses, In this way, by adjusting the rotational speed of the oil pump, the liquid level of the lubricating oil in the cavity and the power of the oil pump can be changed under different rotational speeds of the oil pump, thereby effectively improving the efficiency of the assembly.
  • S902 includes: in the case that the plurality of second losses are smaller than the first losses, adjusting the rotational speed of the oil pump to be corresponding to the lowest loss among the plurality of second losses Oil pump speed.
  • Table 1 is a table based on the relationship between different oil pump rotational speeds and motor rotational speeds and corresponding losses when the oil temperature is 40°C.
  • the first rotational speed is 300
  • the second rotational speed is 1000
  • the first loss corresponding to the first rotational speed and the second rotational speed is 136.7111623
  • the corresponding first rotational speed is 136.7111623.
  • the multiple second losses are 137.4877539, 134.9195812, 129.3901122, and 149.8224251, respectively.
  • the second losses 129.3901122 and 134.9195812 are both smaller than the first losses
  • the third rotational speed is the oil pump rotational speed 1500 corresponding to the lowest loss 129.3901122 among the plurality of second losses.
  • the third speed is the lowest loss among the multiple second losses. Corresponding oil pump speed.
  • the first rotation speed corresponding to the first rotation speed and the second rotation speed can be determined by looking up the table.
  • the loss is 100.1577143
  • the multiple second losses corresponding to the first speed are 24.91105675, 117.8515183, 116.3571159, and 28.18579267, respectively.
  • the second loss 24.91105675 and 28.18579267 is less than the first loss, but the oil pump speed 0 corresponding to the second loss 24.91105675 is less than the second speed, and the oil pump speed 28.18579267 corresponding to the second loss 24.91105675 is not less than the second speed, then the third speed is the second speed
  • the oil pump speed corresponding to the loss 28.18579267 is 1500.
  • the rotational speed of the oil pump is adjusted to the rotational speed of the oil pump corresponding to the lowest loss among the multiple second losses. In this way, the speed of the oil pump can be adjusted to minimize the loss, thereby improving the overall efficiency more effectively.
  • the motor speed, the oil pump speed and the loss are a continuous functional relationship.
  • the correlation is a table based on the relationship between different oil pump speeds and motor speeds and the corresponding losses under different oil temperatures
  • the test data is discrete data, it is impossible to accurately determine the corresponding first speed. of multiple second losses.
  • the first speed is 150, but during the test, due to the discreteness of the values, the relationship between different motor speeds and the corresponding losses when the first speed is 150 is not tested, so from the table In 1, the multiple second losses when the first speed is 150 cannot be directly determined.
  • a table can be established according to the relationship between different oil pump speeds, different motor speeds and corresponding losses under different oil temperatures, combined with interpolation method, for example, based on the discrete data in the table to supplement Insert a continuous function, so that this continuous curve passes through all discrete data points, and obtains the continuous functional relationship between the motor speed, the oil pump speed and the loss.
  • the different oil pump speeds, motor speeds and corresponding losses obtained by testing at different oil temperatures can be used as samples for training the neural network model, and a continuous functional relationship between motor speed, oil pump speed and loss can be obtained. .
  • the control method of the rotational speed of the oil pump may correspond to the description in the above-mentioned embodiment, and will not be repeated here.
  • the motor speed, the oil pump speed and the loss are in a continuous functional relationship, so that multiple second losses corresponding to the first speed can be more accurately determined, so that the oil pump speed is adjusted to the speed corresponding to the lowest loss, Improve overall efficiency more effectively.
  • FIG. 10 shows a schematic structural diagram of a control apparatus provided by an embodiment of the present application.
  • the control device includes: a processing unit 1001 .
  • the processing unit 1001 is configured to complete the step of controlling the rotational speed of the oil pump.
  • the processing unit 1001 is configured to support the control device to perform S601 to S602, S801 to S803 or S901 and S902 in the above embodiment Wait.
  • control apparatus may further include: a communication unit 1002 and a storage unit 1003 .
  • the processing unit 1001, the communication unit 1002, and the storage unit 1003 are connected through a communication bus.
  • the storage unit 1003 may include one or more memories, and the memories may be devices in one or more devices or circuits for storing programs or data.
  • the storage unit 1003 may exist independently, and is connected to the processing unit 1001 of the control device through a communication bus.
  • the storage unit 1003 may also be integrated with the processing unit.
  • the control apparatus may be used in a communication device, circuit, hardware component or chip.
  • the communication unit 1002 may be an input or output interface, a pin, a circuit, or the like.
  • the storage unit 103 may store computer execution instructions of the method of the terminal device, so that the processing unit 1001 executes the method of the terminal device in the above-mentioned embodiments.
  • the storage unit 1003 may be a register, a cache or a RAM, etc., and the storage unit 1003 may be integrated with the processing unit 101.
  • the storage unit 1003 may be a ROM or other types of static storage devices that may store static information and instructions, and the storage unit 1003 may be independent of the processing unit 1001 .
  • An embodiment of the present application provides a control device, where the control device includes one or more modules for implementing the methods in the steps included in the foregoing FIG. -
  • the steps of the method in the steps contained in Figure 8 correspond.
  • a unit or module in the terminal device that executes each step in the method.
  • a module that performs control of the rotational speed of the oil pump may be referred to as a processing module.
  • a module that performs the steps of processing messages or data on the control device side can be referred to as a communication module.
  • FIG. 11 is a schematic structural diagram of a powertrain provided by an embodiment of the application. As shown in FIG. 11 , the powertrain includes a control device 1101 , an inverter 1102 , a motor 1103 , and a reducer 1104 .
  • the control device 1101 may correspond to the description in FIG. 10 , which is not repeated in this embodiment of the present application.
  • the inverter 1102 is used to convert the direct current into alternating current and then transmit it to the motor 1103.
  • the motor 1103 is used to convert alternating current into mechanical energy to drive the vehicle.
  • the speed reducer 1104 is used to convert the output rotational speed of the motor shaft of the motor 1103 .
  • FIG. 12 is a schematic structural diagram of a vehicle according to an embodiment of the application. As shown in FIG. 12 , the vehicle includes: a power battery pack 1201 and a power assembly 1202 .
  • the power battery pack 1201 provides DC power for the inverter of the powertrain 200 .
  • FIG. 13 is a schematic structural diagram of a chip 130 provided by an embodiment of the present invention.
  • the chip 130 includes one or more (including two) processors 1313 and a communication interface 1330 .
  • the chip 130 shown in FIG. 13 further includes a memory 1340 , which may include read-only memory and random access memory, and provides operation instructions and data to the processor 1313 .
  • a portion of memory 1340 may also include non-volatile random access memory (NVRAM).
  • NVRAM non-volatile random access memory
  • memory 1340 stores the following elements, executable modules or data structures, or a subset thereof, or an extended set of them:
  • the corresponding operation is performed by calling the operation instruction stored in the memory 1340 (the operation instruction may be stored in the operating system).
  • a possible implementation manner is: the structure of the chips used by the terminal equipment, the wireless access network device or the session management network element is similar, and different devices may use different chips to realize their respective functions.
  • the processor 1313 controls the operation of the terminal device, and the processor 1313 may also be referred to as a central processing unit (central processing unit, CPU).
  • Memory 1340 may include read-only memory and random access memory, and provides instructions and data to processor 1313 .
  • a portion of memory 1340 may also include non-volatile random access memory (NVRAM).
  • NVRAM non-volatile random access memory
  • the memory 1340, the communication interface 1330, and the memory 1340 are coupled together through the bus system 1320, where the bus system 1320 may include a power bus, a control bus, a status signal bus, and the like in addition to a data bus.
  • the various buses are labeled as bus system 1320 in FIG. 13 .
  • the above communication unit may be an interface circuit or a communication interface of the device for receiving signals from other devices.
  • the communication unit is an interface circuit or a communication interface used by the chip to receive or transmit signals from other chips or devices.
  • the methods disclosed in the above embodiments of the present invention may be applied to the processor 1310 or implemented by the processor 1010 .
  • the processor 1310 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above-mentioned method may be completed by an integrated logic circuit of hardware in the processor 1310 or an instruction in the form of software.
  • the above-mentioned processor 1310 may be a general-purpose processor, a digital signal processor (digital signal processing, DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (field-programmable gate array, FPGA) or Other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the method disclosed in conjunction with the embodiments of the present invention may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory 1040, and the processor 1310 reads the information in the memory 1340, and completes the steps of the above method in combination with its hardware.
  • the communication interface 1330 is configured to perform the steps of receiving and sending the terminal equipment, radio access network device or session management network element in the embodiments shown in FIGS. 4-9 .
  • the processor 1310 is configured to perform processing steps of the terminal device in the embodiments shown in FIG. 4 to FIG. 9 .
  • the instructions stored by the memory for execution by the processor may be implemented in the form of a computer program product.
  • the computer program product can be pre-written in the memory, or downloaded and installed in the memory in the form of software.
  • a computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the procedures or functions according to the embodiments of the present application are generated in whole or in part.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • Computer instructions may be stored on or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server, or data center over a wire (e.g. coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.) to another website site, computer, server, or data center.
  • a wire e.g. coaxial cable, fiber optic, digital subscriber line (DSL)
  • wireless e.g, infrared, wireless, microwave, etc.
  • the computer-readable storage medium can be any available medium that can be stored by a computer or a data storage device such as a server, data center, etc. that includes one or more available media integrated.
  • Useful media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVDs), or semiconductor media (eg, solid state disks, SSDs), and the like.
  • Embodiments of the present application also provide a computer-readable storage medium.
  • the methods described in the above embodiments may be implemented in whole or in part by software, hardware, firmware or any combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
  • Computer-readable media can include both computer storage media and communication media and also include any medium that can transfer a computer program from one place to another.
  • the storage medium can be any target medium that can be accessed by a computer.
  • the computer readable medium may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium intended to carry or in an instruction or data structure
  • the required program code is stored in the form and can be accessed by the computer.
  • any connection is properly termed a computer-readable medium.
  • coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave
  • coaxial cable, fiber optic cable , twisted pair, DSL or wireless technologies such as infrared, radio and microwave
  • Disk and disc as used herein includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and blu-ray disc, where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
  • CD compact disc
  • DVD digital versatile disc
  • floppy disk floppy disk
  • blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
  • the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

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Abstract

一种控制方法和装置，涉及控制领域，可应用于电驱动***，电驱动***包括油泵（401）、电机（402）、减速器（403）和机壳（404），电机（402）和减速器（403）设置在机壳（404）内，机壳（404）内储存有润滑油，油泵（401）用于对润滑油进行泵送。该方法包括：获取电机（402）的第一转速、油泵（401）的第二转速和机壳（404）内润滑油的温度；根据第一转速、第二转速及温度，控制油泵（401）的转速为第三转速。这样，可以通过调节油泵（401）的转速，改变不同油泵转速下的机壳（404）内部润滑油液面高度和油泵功率，从而有效提高总成效率。

Description

一种控制方法和装置 技术领域
本申请涉及控制领域，尤其涉及一种控制方法和装置。
背景技术
电驱动总成是新能源汽车核心零部件，追求电驱动总成的高效率已经成为主流发展需求与趋势。电驱动总成***效率的提升，能提升整车的续航里程，而续航里程则是新能源汽车最重要的性能指标之一。
目前，通常使用电子油泵对电机及减速器进行冷却及主动润滑，电子油泵的作用是把润滑油送到电机各摩擦部位，使润滑油在润滑回路中循环，以保证电机得到良好的冷却和润滑。
然而，使用电子油泵对总成电机及减速器进行冷却和润滑时，总成损耗较大，未有效提高总成效率。
发明内容
本申请实施例提供一种控制方法和装置，可以根据电机的第一转速、油泵的第二转速和润滑油的温度，控制油泵的转速为第三转速。这样可以通过调节油泵的转速，对机壳内润滑油液面高度进行主动控制，改变不同油泵转速下的机壳内部润滑油液面高度和油泵功率，从而有效提高总成效率。
第一方面，本申请实施例提供一种控制方法，应用于电驱动***，电驱动***包括油泵、电机、减速器和机壳，电机和减速器设置在机壳内，机壳内储存有润滑油，油泵用于对润滑油进行泵送，方法包括：获取电机的第一转速、油泵的第二转速和机壳内润滑油的温度；根据第一转速、第二转速及温度，控制油泵的转速为第三转速。这样，本申请实施例可以通过调节油泵的转速，改变不同油泵转速下的机壳内部润滑油液面高度和油泵功率，从而有效提高总成效率。
在一种可能的实现方式中，根据第一转速、第二转速及温度，控制油泵的转速为第三转速，包括：根据温度，确定温度对应的关联关系，关联关系中包括电机转速、油泵转速与损耗的关联关系；在关联关系中确定第一转速和第二转速对应的第一损耗；根据第一损耗和关联关系，控制油泵的转速为第三转速。这样，本申请实施例可以通过电机转速、油泵转速与损耗的关联关系来控制油泵的转速，从而可以更准确的控制油泵转速，从而有效提高总成效率。
在一种可能的实现方式中，根据第一损耗和关联关系，控制油泵的转速为第三转速，包括：在关联关系中确定第一转速对应的多个第二损耗；在其中一个第二损耗小于第一损耗的情况下，调整油泵的转速为第三转速，其中，第三转速为其中一个第二损耗对应的油泵转速。本申请实施例将油泵的转速调整为较小损耗对应的转速，这样，可以有效提高总成效率。
在一种可能的实现方式中，在其中一个第二损耗小于第一损耗的情况下，调整油泵的转速为第三转速，包括：在多个第二损耗小于第一损耗的情况下，调整油泵的转速为第三转速，其中，第三转速为多个第二损耗中最低损耗对应的油泵转速。这样，可以通过调节油泵的转速，使得损耗最低，从而更有效地提高总成效率。
在一种可能的实现方式中，损耗包括：搅油损耗和油泵电耗；其中，搅油损耗为因减速器齿轮在机壳内的润滑油中旋转受到液体阻力所引起的功率损失。
在一种可能的实现方式中，关联关系中，电机转速、油泵转速与损耗为连续的函数关系。这样可以更准确的确定第一转速对应的多个第二损耗，从而将油泵的转速调整为损耗最低时对应的转速，更有效地提高总成效率。
第二方面，本申请实施例提供一种控制装置，应用于电驱动***，电驱动***包括油泵、电机、减速器和机壳，电机和减速器设置在机壳内，机壳内储存有润滑油，油泵用于对润滑油进行泵送。
该控制装置可以是终端设备，也可以是终端设备内的芯片或者芯片***。该控制装置可以包括处理单元。当该控制装置是终端设备时，该处理单元可以是处理器。该控制装置还可以包括存储单元，该存储单元可以是存储器。该存储单元用于存储指令，该处理单元执行该存储单元所存储的指令，以使该终端设备实现第一方面或第一方面的任意一种可能的实现方式中描述的一种控制方法。当该控制装置是终端设备内的芯片或者芯片***时，该处理单元可以是处理器。该处理单元执行存储单元所存储的指令，以使该终端设备实现第一方面或第一方面的任意一种可能的实现方式中描述的一种控制方法。该存储单元可以是该芯片内的存储单元(例如，寄存器、缓存等)，也可以是该终端设备内的位于该芯片外部的存储单元(例如，只读存储器、随机存取存储器等)
示例性的，处理单元，用于获取电机的第一转速、油泵的第二转速和机壳内润滑油的温度；处理单元，还用于根据第一转速、第二转速及温度，控制油泵的转速为第三转速。
在一种可能的实现方式中，处理单元，具体还用于根据温度，确定温度对应的关联关系，关联关系中包括电机转速、油泵转速与损耗的关联关系；处理单元，具体还用于在关联关系中确定第一转速和第二转速对应的第一损耗；处理单元，具体还用于根据第一损耗和关联关系，控制油泵的转速为第三转速。
在一种可能的实现方式中，处理单元，具体还用于在关联关系中确定第一转速对应的多个第二损耗；在其中一个第二损耗小于第一损耗的情况下，调整油泵的转速为第三转速，其中，第三转速为其中一个第二损耗对应的油泵转速。
在一种可能的实现方式中，处理单元，具体还用于：在多个第二损耗小于第一损耗的情况下，调整油泵的转速为第三转速，其中，第三转速为多个第二损耗中最低损耗对应的油泵转速。
在一种可能的实现方式中，损耗包括：搅油损耗和油泵电耗；其中，搅油损耗为因减速器齿轮在机壳内的润滑油中旋转受到液体阻力所引起的功率损失。
在一种可能的实现方式中，关联关系中，电机转速、油泵转速与损耗为连续的函 数关系。
第三方面，本申请实施例提供一种控制装置，包括：处理器，用于调用存储器中的程序，以实现第一方面或第一方面任意可能的实现方式中的任一控制方法。
第四方面，本申请还提供了一种动力总成，包括以上第二方面或第二方面任意可能实现方式中的任一控制装置，该动力总成还包括：逆变器、电机以及减速器。其中，逆变器用于将直流电转换为交流电后传输至电机；电机用于将交流电转换为机械能以驱动车辆行驶；减速器用于对电机的电机转轴的输出转速进行转换。
第五方面，本申请还提供了一种车辆，包括第四方面中的动力总成和动力电池组，该动力电池组用于为逆变器提供直流电。
第六方面，本申请实施例提供一种芯片，包括：处理器和接口电路，接口电路用于与其它装置通信，处理器处理器用于运行计算机程序或指令，以进行第一方面任意的实现方式中任一项所描述的控制方法。
其中，芯片中的通信接口可以为输入/输出接口、管脚或电路等。
在一种可能的实现中，本申请中上述描述的芯片或者芯片***还包括至少一个存储器，该至少一个存储器中存储有指令。该存储器可以为芯片内部的存储单元，例如，寄存器、缓存等，也可以是该芯片的存储单元(例如，只读存储器、随机存取存储器等)。
第七方面，本申请实施例提供一种计算机可读存储介质，计算机可读存储介质中存储有计算机程序或指令，当计算机程序或指令在计算机上运行时，使得计算机执行如第一方面的任意一种实现方式中描述的控制方法。
应当理解的是，本申请实施例的第二方面至第七方面与本申请实施例的第一方面的技术方案相对应，各方面及对应的可行实施方式所取得的有益效果相似，不再赘述。
附图说明
图1为本申请实施例提供的一种水冷电机电驱动总成的示意图；
图2为本申请实施例提供的一种使用水冷方式进行散热时减速器搅油情况的示意图；
图3为本申请实施例提供的一种油冷电机电驱动总成的示意图；
图4为本申请实施例提供的一种电驱动总成***的示意图；
图5为本申请实施例提供的一种电机内部的基本结构示意图；
图6为本申请实施例提供的一种控制方法的流程示意图；
图7为本申请实施例获取电机的第一转速的示意图；
图8为本申请实施例提供的一种控制方法的流程示意图；
图9为本申请实施例提供的一种控制方法的流程示意图；
图10为本申请实施例提供的一种控制装置的结构示意图；
图11为本申请实施例提供的一种动力总成的结构示意图；
图12为本申请实施例提供的一种车辆的结构示意图；
图13为本申请实施例提供的一种芯片的结构示意图。
具体实施方式
为了便于清楚描述本申请实施例的技术方案，在本申请的实施例中，采用了“第一”、“第二”等字样对功能和作用基本相同的相同项或相似项进行区分。例如，第一转速和第二转速仅仅是为了区分油泵和电机的转速，并不对其先后顺序进行限定。本领域技术人员可以理解“第一”、“第二”等字样并不对数量和执行次序进行限定，并且“第一”、“第二”等字样也并不限定一定不同。
需要说明的是，本申请中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其他实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念。
本申请中，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A，B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b，或c中的至少一项(个)，可以表示：a，b，c，a-b，a-c，b-c，或a-b-c，其中a，b，c可以是单个，也可以是多个。
电驱动总成***可以包括：电机控制器、电机和减速器。其中，每一部分的效率损失都会影响到电驱动总成***的效率，从而影响整车的续航里程。其中，减速器齿轮的搅油损失是电驱动总成***效率损失的重要构成部分。
通常，电机在高速运转时，电机定子会产生大量的热量，如果不及时进行散热，会严重影响电机的工作可靠性及整车性能。因此，需要对电机进行散热。
目前普遍采用的电机散热方式可以包括水冷散热和油冷散热两种方式。
示例性的，图1为水冷电机电驱动总成的示意图，如图1所示，电机定子采用冷却液(例如防冻液)进行散热，减速器采用润滑油进行润滑。例如，通过使用水泵来驱动冷却液以加速流动，对电机进行散热。
其中，润滑油位于机壳内，减速器通过主减大齿轮搅油对齿轮和轴承进行飞溅润滑，例如，图2为采用水冷方式进行散热时减速器搅油情况的示意图，减速器由若干齿轮、轴和轴承等零件组成，减速器齿轮部分浸泡在油池中，润滑油通过齿轮的转动被带到啮合齿面以进行润滑。为了防止搅油时功率损失过大，齿轮浸入油池深度不宜过深，例如齿轮浸入油池深度可以为齿轮半径的四分之一。主减大齿轮顶部距机壳底部的距离可以大于5mm，避免油池底部的油泥或杂物覆在齿轮啮合面，使摩擦加剧。
然而，当采用水冷方式对电机进行散热时，为实现齿轮和轴承的良好润滑，润滑油量需求较大，液位较高，导致减速器齿轮产生的搅油损耗较高，且润滑油液面高度无法随总成工况变化进行调节。可以理解为，当润滑油的加油量确定之后，搅油损耗也随之固定，无法针对搅油损耗进行优化。
示例性的，图3示出了采用油冷方式对电机进行散热的示意图，如图3所示，可以采用电子油泵泵出机壳内的润滑油，实现对电机及减速器进行冷却和主动润滑。
当采用油冷方式对电机进行散热时，由于润滑油循环回路具有一定储油功能，可降低减速器的液面高度，从而减少搅油损失。然而，在采用油泵进行冷却润滑时，仅考虑总成的散热和润滑，未主动通过油泵来调节腔体内润滑油的液面高度，实现搅油损耗的优化，所以，在不同的总成工况下的搅油损耗并不是最优的。
基于上述两种方法存在的问题，本申请实施例提供一种控制方法，可以通过调节油泵的转速，改变不同油泵转速下的腔体内部润滑油液面高度和油泵功率，从而有效提高总成效率。
本申请实施例提供的控制方法可以应用于如图4所示的动力总成***中。该动力总成***400可以包括油泵401、电机402、减速器403和机壳404。
其中，电机402和减速器403设置在机壳404内，机壳内储存有润滑油，油泵401用于对润滑油进行泵送，实现对电机402和减速器403的冷却润滑。
电机402是一种依据电磁感应定律实现电能转换或传递的电磁装置，主要作用是产生驱动转矩，为电器或各种机械产生动力。具体地，电机402可以应用于电动汽车中，例如，纯电动汽车、增程式电动汽车、混合动力电动汽车、燃料电池汽车、新能源汽车等。
图5示出了一种电机内部的结构示意图。如图5所示，电机500主要包括：定子510、转轴540、转子550、壳体560、前端盖570、后端盖580和电机轴承590。其中，定子510上绕设有定子绕组，且定子绕组在绕设时，其两端会从定子铁芯的两端向外延伸出去形成定子绕组的端部5301和5302。电机的各个部件之间的关系为：壳体560、前端盖570和后端盖580的内壁围成一个腔体，腔体内由外圈到内圈依次设有定子510、转子550以及转轴540，也就是说转轴540外套设转子550，转子550外套设定子510。且定子510在壳体560内固定，转子550带动转轴540进行转动。转轴540的两端分别通过电机轴承590与壳体560相对的两个侧端面(前端盖570和后端盖580)转动相连，其中一端也可以从一个侧端面与减速器的输入轴齿轮相连。
减速器403包括平行轴齿轮减速机构和行星齿轮减速机构，且每个平行轴齿轮减速机构的输入齿轮与一个电机402连接，输出齿轮与一个行星齿轮减速机构的主动件连接，每个行星齿轮减速机构的从动件与一个动力输出轴连接。由于在同等转速下，平行轴齿轮减速机构中的齿轮加工难度较低，因此将平行轴齿轮减速机构与驱动电机直接连接，再将行星齿轮减速机构与该平行轴齿轮减速机构连接，可以降低行星齿轮减速机构的转速，进而降低对行星齿轮减速机构的齿轮加工精度的要求。
下面以具体地实施例对本申请的技术方案以及本申请的技术方案如何解决上述技术问题进行详细说明。下面这几个具体的实施例可以独立实现，也可以相互结合，对于相同或相似的概念或过程可能在某些实施例中不再赘述。
图6是本申请实施例提供的一种控制方法的流程示意图，该方法适用于上述图4对应的动力总成***。如图6所示，本申请实施例提供的一种控制方法，可以包括以下步骤：
S601：获取电机的第一转速、油泵的第二转速和机壳内润滑油的温度。
可能的理解方式中，电机的第一转速为电机转子的转速。
可能的实现方式中，可以通过光电传感器来获取电机的第一转速。其中，光电传感器可以包括投射式光电传感器或反射式光电传感器。示例性的，使用投射式光电传感器来获取电机的第一转速的示意图如图7所示。在被测电动汽车电机轴上安装一个测试盘，例如，齿圆盘或者孔圆盘，圆盘上有Z个均匀齿槽或者圆孔。其中，Z可以为60或者60的整数倍。当光束通过槽部或者小孔时，投射到光敏二极管上产生电信号，当光束被圆盘中无孔的部分挡住时，光敏二极管无信号，从而光敏二极管产生的脉冲信号的频率正比于电机转速。
可能的实现方式中，机壳内润滑油的温度可以由温度传感器来获取。
可以理解的是，也可以采用任意可能的形式获取电机的第一转速、油泵的第二转速和机壳内润滑油的温度，本申请实施例对获取的具体方式不作限定。
S602：根据第一转速、第二转速及温度，控制油泵的转速为第三转速。
可能的实现方式中，可以将第一转速、第二转速及温度输入至预先训练好的模型中，得到的输出结果为油泵的第三转速。
可能的实现方式中，可以将第一转速、第二转速及温度输入至预先得到的计算公式中，经过计算得到油泵的第三转速。
可能的实现方式中，通过多次测试得到不同油温下，不同的油泵转速和电机转速，建立油温、油泵转速和电机转速之间的关系所对应的表格。通过查询表格，确定油泵的转速为第三转速。
本申请实施例中，也可以结合实际的应用场景采用其他可能的方式根据第一转速、第二转速及温度来控制油泵的转速为第三转速，本申请实施例对此不作限定。
本申请实施例中，可以通过调节油泵的转速，对机壳内润滑油液面高度进行主动控制，改变不同油泵转速下的腔体内部润滑油液面高度和油泵功率，从而有效提高总成效率。
在图1对应的实施例的基础上，一种可能的实现方式中，如图8所示，如S602包括：
S801：根据温度，确定温度对应的关联关系，关联关系中包括电机转速、油泵转速与损耗的关联关系。
可能的实现方式中，损耗可以为总成损耗。其中，总成损耗可以包括：电机损耗、轴承损耗、搅油损耗和油泵电耗。搅油损耗与机壳内润滑油的液面高度有关，油泵电耗与油泵转速有关。
可能的实现方式中，损耗可以包括总成损耗中的一种或多种。
可能的实现方式中，该关联关系可以为先验知识。该先验知识可以是通过测试不同油温下，不同的油泵转速和电机转速与对应的损耗之间的关系建立的表格。通过查询表格，得到获取的润滑油的温度对应的关联关系。
可以理解，本申请实施例中的关联关系也可以为柱形图或折线图，或其他的表现形式，本申请实施例不作具体的限定。
S802：在关联关系中确定第一转速和第二转速对应的第一损耗。
可能的理解方式中，第一损耗可以为第一转速和第二转速对应的总成损耗，或者， 第一损耗可以包括总成损耗中的一种或多种。
可能的实现方式中，可以通过查询表格，确定第一转速和第二转速对应的第一损耗。
示例性的，可以分别测试在油温为30℃、40℃、50℃和60℃时，不同的油泵转速和电机转速与对应的损耗之间的关系建立的表格。可以理解，可以得到四张表格。当获取的油温为30℃时，可以通过查询油温为30℃时不同的油泵转速和电机转速与对应的损耗之间的关系，确定第一转速和第二转速在表格中对应的第一损耗。
S803：根据第一损耗和关联关系，控制油泵的转速为第三转速。
可能的实现方式中，根据第一转速和第二转速对应的第一损耗，在获取的润滑油的温度对应的关联关系中，确定第一转速对应的多个损耗值，在多个损耗值中确定是否存在比第一损耗小的损耗值。在存在比第一损耗小的损耗值的情况下，第三转速为比第一损耗小的其中一个损耗值对应的转速。在不存在比第一损耗小的损耗值的情况下，控制油泵的转速不变，可以理解为，第三转速与第二转速相同。
可能的实现方式中，根据第一转速和第二转速对应的第一损耗，在获取的润滑油的温度对应的关联关系中，确定第一转速对应的多个损耗值。在多个损耗值中确定是否存在比第一损耗小的损耗值，在存在多个比第一损耗小的损耗值的情况下，将油泵转速调整为比第一损耗小的多个损耗值中最低损耗对应的转速。在不存在比第一损耗小的损耗值的情况下，控制油泵的转速不变，可以理解为，第三转速与第二转速相同。
本申请实施例中，可以通过电机转速、油泵转速与损耗的关联关系来控制油泵的转速，从而可以更准确的对油泵转速进行调整，从而有效提高总成效率。
在图8对应的实施例的基础上，一种可能的实现方式中，损耗包括：搅油损耗和油泵电耗。
其中，搅油损耗为因减速器齿轮在机壳的润滑油中旋转受到液体阻力所引起的功率损失。油泵电耗与油泵的转速有关，例如，油泵转速越快，油泵电耗越大；油泵转速越小，油泵电耗越大。
可能的理解方式中，搅油损耗与机壳的润滑油的液面高度有关，且机壳的润滑油的液面高度与油泵转速有关。例如，油泵转速越快，泵出的润滑油越多，机壳的润滑油的油量较少，液面高度越低，导致减速器齿轮在机壳的润滑油中旋转受到液体阻力所引起的功率损失越小，因此对应的搅油损耗越小。相反地，油泵转速越慢，泵出的润滑油越少，机壳的润滑油的液面高度越高，导致减速器齿轮在机壳的润滑油中旋转受到液体阻力所引起的功率损失越大，因此对应的搅油损耗越大。
本申请实施例中，根据电机的第一转速和润滑油的油温调节油泵转速，可以改变电机减速器腔体中的润滑油的油量，调节搅油液面高度，从而控制搅油损耗和油泵电耗之和最小。这样，可以降低总成损耗，提高总成效率。
在图8对应的实施例的基础上，一种可能的实现方式中，如图9所示，S803包括：
S901：在关联关系中确定第一转速对应的多个第二损耗。
可能的实现方式中，该关联关系可以为先验知识。该先验知识可以是通过测试不同油温下，不同的油泵转速和电机转速与对应的损耗之间的关系建立的表格。通过查询表格，在关联关系中确定第一转速对应的多个第二损耗。其中，损耗包括：搅油损 耗和油泵电耗。
S902：在其中一个第二损耗小于第一损耗的情况下，调整油泵的转速为第三转速。
其中，第三转速为所述其中一个第二损耗对应的油泵转速。
示例性的，表1为油温为40℃时，不同的油泵转速和电机转速与对应的损耗之间的关系建立的表格。
表1
Figure PCTCN2020141597-appb-000001
若获取的润滑油的温度为40℃，第一转速为300，第二转速为500，则通过查表可以确定第一转速和第二转速对应的第一损耗为134.9195812，且第一转速对应的多个第二损耗分别为137.4877539、136.7111623、129.3901122和149.8224251。其中，在多个第二损耗中的其中一个第二损耗129.3901122小于第一损耗，则第三转速为第二损耗129.3901122对应的油泵转速1500。
若获取的润滑油的温度为40℃，第一转速为300，第二转速为1000，则通过查表可以确定第一转速和第二转速对应的第一损耗为136.7111623，且第一转速对应的多个第二损耗分别为137.4877539、134.9195812、129.3901122和149.8224251。其中，第二损耗129.3901122和134.9195812均小于第一损耗，则第三转速为第二损耗129.3901122对应的油泵转速1500，或者第三转速为第二损耗134.9195812对应的油泵转速500。
可能的实现方式中，在其中一个第二损耗小于第一损耗的情况下，并且当其中一个第二损耗对应的油泵转速不小于第二转速时，调整油泵的转速为该第二损耗对应的油泵转速。当该第二损耗对应的油泵转速小于第二转速时，第三转速保持原来的第二转速不变。
可能的理解方式中，在不同的工况下，当润滑油的油量达到一定值时，才能保证总成***的冷却和润滑需求。当油泵转速调整为比第二转速低的转速时，油泵所泵出的油量减少，导致可能存在不能满足冷却润滑需求的问题。因此，为了保证总成***的冷却润滑需求，第三转速可以调整为第二损耗对应的油泵转速不小于第二转速时对应的油泵转速。这样，可以在满足总成***的冷却润滑需求的前提下，有效提高总成 效率。
示例性的，如表1所示，若获取的润滑油的温度为40℃，第一转速为400，第二转速为500，则通过查表可以确定第一转速和第二转速对应的第一损耗为242.16，且第一转速对应的多个第二损耗分别为254.7495079、242.3020135、213.3399312和262.8393466。其中，第二损耗129.3901122小于第一损耗，且第二损耗213.3399312对应的油泵转速1500不小于第二转速500，则第三转速为第二损耗213.3399312对应的油泵转速1500。
若获取的润滑油的温度为40℃，第一转速为100，第二转速为500，则通过查表可以确定第一转速和第二转速对应的第一损耗为19.10806283，且第一转速对应的多个第二损耗分别为14.88473822、19.75720568、21.43655737和23.62649258。其中，第二损耗14.88473822小于第一损耗，但是第二损耗14.88473822对应的油泵转速0小于第二转速500，则油泵保持原有的第二转速不变。
本申请实施例通过在关联关系中确定第一转速对应的多个第二损耗，在其中一个第二损耗小于第一损耗的情况下，调整油泵的转速为其中一个第二损耗对应的油泵转速，这样可以通过调节油泵的转速，改变不同油泵转速下的腔体内部润滑油液面高度和油泵功率，从而有效提高总成效率。
在图9的实施例的基础上，一种可能的实现方式中，S902包括：在多个第二损耗小于第一损耗的情况下，调整油泵的转速为多个第二损耗中最低损耗对应的油泵转速。
示例性的，表1为油温为40℃时，不同的油泵转速和电机转速与对应的损耗之间的关系建立的表格。
若获取的润滑油的温度为40℃，第一转速为300，第二转速为1000，则通过查表可以确定第一转速和第二转速对应的第一损耗为136.7111623，且第一转速对应的多个第二损耗分别为137.4877539、134.9195812、129.3901122和149.8224251。其中，第二损耗129.3901122和134.9195812均小于第一损耗，则第三转速为多个第二损耗中的最低损耗129.3901122对应的油泵转速1500。
可能的实现方式中，在多个第二损耗小于第一损耗的情况下，并且当多个第二损耗对应的油泵转速不小于第二转速时，第三转速为多个第二损耗中最低损耗对应的油泵转速。
示例性的，如表1所示，若获取的润滑油的温度为40℃，第一转速为200，第二转速为1000，则通过查表可以确定第一转速和第二转速对应的第一损耗为100.1577143，且第一转速对应的多个第二损耗分别为24.91105675、117.8515183、116.3571159和28.18579267。其中，第二损耗24.91105675和28.18579267小于第一损耗，但第二损耗24.91105675对应的油泵转速0小于第二转速，第二损耗24.91105675对应的油泵转速28.18579267不小于第二转速，则第三转速为第二损耗28.18579267对应的油泵转速1500。
本申请实施例中，在多个第二损耗小于第一损耗的情况下，调整油泵的转速为多个第二损耗中最低损耗对应的油泵转速。这样可以通过调节油泵的转速，使得损耗最低，从而更有效地提高总成效率。
在上述任一实施例的基础上，一种可能的实现方式中，关联关系中，电机转速、 油泵转速与损耗为连续的函数关系。
可能的理解方式中，当关联关系为不同油温下，不同的油泵转速和电机转速与对应的损耗之间的关系建立的表格时，由于测试数据为离散数据，无法准确地确定第一转速对应的多个第二损耗。例如，当第一转速为150时，但在测试过程中，由于取值的离散性，没有对第一转速为150时，不同的电机转速与对应的损耗之间的关系进行测试，从而从表1中不能直接确定第一转速为150时的多个第二损耗。
因此，可能的实现方式中，可以根据不同油温下，不同的油泵转速和电机转速与对应的损耗之间的关系建立的表格，结合插值法，例如，在表格中的离散数据的基础上补插连续函数，使得这条连续曲线通过全部的离散数据点，得到电机转速、油泵转速与损耗之间的连续的函数关系。
可能的实现方式中，可以将不同油温下，测试得到的不同的油泵转速和电机转速与对应的损耗作为训练神经网络模型的样本，得到电机转速、油泵转速与损耗之间的连续的函数关系。
当获取电机的第一转速、油泵的第二转速和机壳润滑油的温度后，通过该温度对应的函数关系，确定第一转速对应的多个第二损耗，从而控制油泵的转速。其中，油泵转速的控制方法可以对应上述实施例中的记载，此处不再赘述。
本申请实施例中，电机转速、油泵转速与损耗为连续的函数关系，这样可以更准确的确定第一转速对应的多个第二损耗，从而将油泵的转速调整为损耗最低时对应的转速，更有效地提高总成效率。
上面结合图4-图9，对本申请实施例的方法进行了说明，下面对本申请实施例提供的执行上述方法的控制装置进行描述。本领域技术人员可以理解，方法和装置可以相互结合和引用，本申请实施例提供的一种控制装置可以执行上述控制方法的步骤。
下面以采用对应各个功能划分各个功能模块为例进行说明：
如图10所示，图10示出了本申请实施例提供的控制装置的结构示意图。该控制装置包括：处理单元1001。其中，处理单元1001用于完成对油泵转速进行控制的步骤。
一种示例，以该控制装置为终端设备或应用于终端设备中的芯片或芯片***为例，处理单元1001用于支持控制装置执行上述实施例中的S601至S602，S801至S803或S901和S902等。
在一种可能的实施例中，控制装置还可以包括：通信单元1002和存储单元1003。处理单元1001、通信单元1002、存储单元1003通过通信总线相连。
存储单元1003可以包括一个或者多个存储器，存储器可以是一个或者多个设备、电路中用于存储程序或者数据的器件。
存储单元1003可以独立存在，通过通信总线与控制装置具有的处理单元1001相连。存储单元1003也可以和处理单元集成在一起。
控制装置可以用于通信设备、电路、硬件组件或者芯片中。
以控制装置可以是本申请实施例中的终端设备为例，则通信单元1002可以是输入或者输出接口、管脚或者电路等。示例性的，存储单元103可以存储终端设备的方法的计算机执行指令，以使处理单元1001执行上述实施例中终端设备的方法。存储单元 1003可以是寄存器、缓存或者RAM等，存储单元1003可以和处理单元101集成在一起。存储单元1003可以是ROM或者可存储静态信息和指令的其他类型的静态存储设备，存储单元1003可以与处理单元1001相独立。
本申请实施例提供了一种控制装置，该控制装置包括一个或者多个模块，用于实现上述图4-图8中所包含的步骤中的方法，该一个或者多个模块可以与上述图4-图8中所包含的步骤中的方法的步骤相对应。具体的，本申请实施例中由终端设备执行的方法中的每个步骤，终端设备中存在执行该方法中每个步骤的单元或者模块。例如，对于执行对油泵转速进行控制的模块可以称为处理模块。对于执行对在控制装置侧进行消息或数据处理的步骤的模块可以称为通信模块。
图11为本申请实施例提供的一种动力总成的结构示意图，如图11所示，该动力总成包括控制装置1101、逆变器1102、电机1103以及减速器1104。
控制装置1101可以对应图10的记载，本申请实施例不再赘述。
逆变器1102，用于将直流电转换为交流电后传输至电机1103.
电机1103，用于将交流电转换为机械能以驱动车辆行驶。
减速器1104，用于对电机1103的电机转轴的输出转速进行转换。
图12为本申请实施例提供的一种车辆的结构示意图。如图12所示，该车辆包括：动力电池组1201和动力总成1202。
其中，动力总成1202可以参见图11的记载，本申请实施例在此不再赘述。
动力电池组1201由于为动力总成200的逆变器提供直流电。
图13是本发明实施例提供的芯片130的结构示意图。芯片130包括一个或两个以上(包括两个)处理器1313和通信接口1330。
在一种可能的实施例中，如图13所示的芯片130还包括存储器1340，存储器1340可以包括只读存储器和随机存取存储器，并向处理器1313提供操作指令和数据。存储器1340的一部分还可以包括非易失性随机存取存储器(non-volatile random access memory，NVRAM)。
在一些实施方式中，存储器1340存储了如下的元素，可执行模块或者数据结构，或者他们的子集，或者他们的扩展集：
在本发明实施例中，通过调用存储器1340存储的操作指令(该操作指令可存储在操作***中)，执行相应的操作。
一种可能的实现方式中为：终端设备、无线接入网装置或会话管理网元所用的芯片的结构类似，不同的装置可以使用不同的芯片以实现各自的功能。
处理器1313控制终端设备的操作，处理器1313还可以称为中央处理单元(central processing unit，CPU)。存储器1340可以包括只读存储器和随机存取存储器，并向处理器1313提供指令和数据。存储器1340的一部分还可以包括非易失性随机存取存储器(non-volatile random access memory，NVRAM)。例如应用中存储器1340、通信接口1330以及存储器1340通过总线***1320耦合在一起，其中总线***1320除包括数据总线之外，还可以包括电源总线、控制总线和状态信号总线等。但是为了清楚说明起见，在图13中将各种总线都标为总线***1320。
以上通信单元可以是一种该装置的接口电路或通信接口，用于从其它装置接收信 号。例如，当该装置以芯片的方式实现时，该通信单元是该芯片用于从其它芯片或装置接收信号或发送信号的接口电路或通信接口。
上述本发明实施例揭示的方法可以应用于处理器1310中，或者由处理器1010实现。处理器1310可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法的各步骤可以通过处理器1310中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器1310可以是通用处理器、数字信号处理器(digital signal processing，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field-programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本发明实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本发明实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器1040，处理器1310读取存储器1340中的信息，结合其硬件完成上述方法的步骤。
一种可能的实现方式中，通信接口1330用于执行图4-图9所示的实施例中的终端设备、无线接入网装置或会话管理网元的接收和发送的步骤。处理器1310用于执行图4-图9所示的实施例中的终端设备的处理的步骤。
在上述实施例中，存储器存储的供处理器执行的指令可以以计算机程序产品的形式实现。计算机程序产品可以是事先写入在存储器中，也可以是以软件形式下载并安装在存储器中。
计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行计算机程序指令时，全部或部分地产生按照本申请实施例的流程或功能。计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一计算机可读存储介质传输，例如，计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。计算机可读存储介质可以是计算机能够存储的任何可用介质或者是包括一个或多个可用介质集成的服务器、数据中心等数据存储设备。可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘solid state disk，SSD)等。
本申请实施例还提供了一种计算机可读存储介质。上述实施例中描述的方法可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。如果在软件中实现，则功能可以作为一个或多个指令或代码存储在计算机可读介质上或者在计算机可读介质上传输。计算机可读介质可以包括计算机存储介质和通信介质，还可以包括任何可以将计算机程序从一个地方传送到另一个地方的介质。存储介质可以是可由计算机访问的任何目标介质。
作为一种可能的设计，计算机可读介质可以包括RAM，ROM，EEPROM，CD-ROM或其它光盘存储器，磁盘存储器或其它磁存储设备，或目标于承载的任何其它介质或 以指令或数据结构的形式存储所需的程序代码，并且可由计算机访问。而且，任何连接被适当地称为计算机可读介质。例如，如果使用同轴电缆，光纤电缆，双绞线，数字用户线(DSL)或无线技术(如红外，无线电和微波)从网站，服务器或其它远程源传输软件，则同轴电缆，光纤电缆，双绞线，DSL或诸如红外，无线电和微波之类的无线技术包括在介质的定义中。如本文所使用的磁盘和光盘包括光盘(CD)，激光盘，光盘，数字通用光盘(DVD)，软盘和蓝光盘，其中磁盘通常以磁性方式再现数据，而光盘利用激光光学地再现数据。上述的组合也应包括在计算机可读介质的范围内。以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。

Claims (17)

  1. 一种控制方法，其特征在于，应用于电驱动***，所述电驱动***包括油泵、电机、减速器和机壳，所述电机和所述减速器设置在所述机壳内，所述机壳内储存有润滑油，所述油泵用于对所述润滑油进行泵送，所述方法包括：
    获取所述电机的第一转速、所述油泵的第二转速和所述机壳内润滑油的温度；
    根据所述第一转速、所述第二转速及所述温度，控制所述油泵的转速为第三转速。
  2. 根据权利要求1所述的方法，其特征在于，所述根据所述第一转速、所述第二转速及所述温度，控制所述油泵的转速为所述第三转速，包括：
    根据所述温度，确定所述温度对应的关联关系，所述关联关系中包括电机转速、油泵转速与损耗的关联关系；
    在所述关联关系中确定所述第一转速和所述第二转速对应的第一损耗；
    根据所述第一损耗和所述关联关系，控制所述油泵的转速为第三转速。
  3. 根据权利要求2所述的方法，其特征在于，所述根据所述第一损耗和所述关联关系，控制所述油泵的转速为第三转速，包括：
    在所述关联关系中确定所述第一转速对应的多个第二损耗；
    在其中一个所述第二损耗小于所述第一损耗的情况下，调整所述油泵的转速为所述第三转速，其中，所述第三转速为所述其中一个第二损耗对应的油泵转速。
  4. 根据权利要求3所述的方法，其特征在于，所述在其中一个所述第二损耗小于所述第一损耗的情况下，调整所述油泵的转速为所述第三转速，包括：
    在多个所述第二损耗小于所述第一损耗的情况下，调整所述油泵的转速为所述第三转速，其中，所述第三转速为多个所述第二损耗中最低损耗对应的油泵转速。
  5. 根据权利要求2-4任一项所述的方法，其特征在于，所述损耗包括：搅油损耗和油泵电耗；其中，所述搅油损耗为因所述减速器齿轮在所述机壳内的润滑油中旋转受到液体阻力所引起的功率损失。
  6. 根据权利要求2-5任一项所述的方法，其特征在于，所述关联关系中，电机转速、油泵转速与损耗为连续的函数关系。
  7. 一种控制装置，其特征在于，应用于电驱动***，所述电驱动***包括油泵、电机、减速器和机壳，所述电机和所述减速器设置在所述机壳内，所述机壳内储存有润滑油，所述油泵用于对所述润滑油进行泵送，所述装置包括：
    处理单元，用于获取所述电机的第一转速、所述油泵的第二转速和所述机壳内润滑油的温度；
    所述处理单元，还用于根据所述第一转速、所述第二转速及所述温度，控制所述油泵的转速为第三转速。
  8. 根据权利要求7所述的装置，其特征在于，所述处理单元，具体还用于：
    根据所述温度，确定所述温度对应的关联关系，所述关联关系中包括电机转速、 油泵转速与损耗的关联关系；
    在所述关联关系中确定所述第一转速和所述第二转速对应的第一损耗；
    根据所述第一损耗和所述关联关系，控制所述油泵的转速为第三转速。
  9. 根据权利要求8所述的装置，其特征在于，所述处理单元，具体还用于：
    在所述关联关系中确定所述第一转速对应的多个第二损耗；
    在其中一个所述第二损耗小于所述第一损耗的情况下，调整所述油泵的转速为所述第三转速，其中，所述第三转速为所述其中一个第二损耗对应的油泵转速。
  10. 根据权利要求9所述的装置，所述处理单元，具体还用于：
    在多个所述第二损耗小于所述第一损耗的情况下，调整所述油泵的转速为所述第三转速，其中，所述第三转速为多个所述第二损耗中最低损耗对应的油泵转速。
  11. 根据权利要求8-10任一项所述的装置，其特征在于，所述损耗包括：搅油损耗和油泵电耗；其中，所述搅油损耗为因所述减速器齿轮在所述机壳内的润滑油中旋转受到液体阻力所引起的功率损失。
  12. 根据权利要求8-11任一项所述的装置，其特征在于，所述关联关系中，电机转速、油泵转速与损耗为连续的函数关系。
  13. 一种控制装置，其特征在于，包括：处理器，用于调用存储器中的程序，以执行权利要求1-6任一项所述的方法。
  14. 一种动力总成，包括权利要求7-12中任一项所述的控制装置，所述动力总成还包括：逆变器、电机以及减速器；
    所述逆变器，用于将直流电转换为交流电后传输至所述电机；
    所述电机，用于将所述交流电转换为机械能以驱动车辆行驶；
    所述减速器，用于对所述电机的电机转轴的输出转速进行转换。
  15. 一种车辆，其特征在于，所述车辆包括权利要求14所述的动力总成和动力电池组，所述动力电池组用于为逆变器提供直流电。
  16. 一种芯片，其特征在于，包括：处理器和接口电路，所述接口电路用于与其它装置通信，所述处理器用于执行权利要求1-6任一项所述的方法。
  17. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有指令，当所述指令被执行时，使得计算机执行如权利要求1-6任一项所述的方法。
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