CN111865183A - Motor active heating control method and system for vehicle and vehicle - Google Patents
Motor active heating control method and system for vehicle and vehicle Download PDFInfo
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- CN111865183A CN111865183A CN201910334827.9A CN201910334827A CN111865183A CN 111865183 A CN111865183 A CN 111865183A CN 201910334827 A CN201910334827 A CN 201910334827A CN 111865183 A CN111865183 A CN 111865183A
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- motor
- vehicle
- axis current
- heat
- quadrature
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/60—Controlling or determining the temperature of the motor or of the drive
- H02P29/62—Controlling or determining the temperature of the motor or of the drive for raising the temperature of 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
- B60K1/00—Arrangement or mounting of electrical propulsion units
-
- 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
- B60K2001/008—Arrangement or mounting of electrical propulsion units with means for heating the electrical propulsion units
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a motor active heating control method and system for a vehicle and the vehicle, and relates to the technical field of vehicles. The motor active heating control method for the vehicle comprises the steps of judging whether the vehicle has heat demand or not; detecting the running state of the vehicle; if the vehicle has heat demand and is in a static state, controlling the direct-axis current of the motor to be alternating current and controlling the quadrature-axis current of the motor to be zero; the direct-axis current of the motor is alternating current and the quadrature-axis current of the motor is zero, an alternating magnetic field parallel to a rotor magnetic field of the motor is formed inside the motor, and the motor does not output torque. The invention also provides a corresponding control system. Meanwhile, the invention also provides a vehicle which adopts the control method to control the heating of the motor or comprises the control system. The invention can enable the motor to generate enough heat to meet the heat requirement of the vehicle when the whole vehicle is static.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a motor active heating control method and system for a vehicle and the vehicle.
Background
With the development and progress of society, the electric vehicle as an environment-friendly vehicle has the advantages of economical operation, cleanness, environmental protection and the like, and the application range of the electric vehicle is wider and wider.
At present, a driving system and a thermal management system of an electric vehicle are respectively realized through different components, and the functions of the driving system and the thermal management system are relatively independent and are not multiplexed.
Disclosure of Invention
The inventors of the present application have found that a vehicle drive system is mainly used for providing a driving force, and that high efficiency of a motor is mainly targeted in designing and controlling the motor in consideration of an increase in driving mileage as high as possible. Heat generation of the vehicle thermal management system mainly generates heat by a heat generating element such as a PTC.
Since the motor has a low load when operating at a low speed, it generates less heat if the motor is controlled to a high efficiency target. When the motor runs at a high speed, the load is high, the generated heat is relatively large, but the heat demand of the whole motor is relatively independent of the running working condition, so that the heat generated by the motor is difficult to heat the whole motor under the condition that the heat productivity of the motor is uncontrollable.
Meanwhile, because the thermal management system and the cooling system of the driving system are relatively independent and the temperature of the water inlet of the motor is required to be kept not to exceed a certain value, the heat generated by the motor is not utilized, and is finally dissipated in the air through the cooling system. When the vehicle is stationary, the electric machine is not operated at this time if the control is optimally efficient, and if there is a heat demand at this time, the heat generation by the PTC is required at this time to generate the corresponding heat.
In summary, the electric vehicle has two disadvantages: on the one hand, the heat generated by the motor is not utilized; on the other hand, when the whole vehicle is stationary, the motor cannot generate heat in an efficient control mode, so that heat must be generated through a heating element such as a PTC.
To this end, it is an object of a first aspect of the present invention to provide an active heating control method for a motor of a vehicle, which enables the motor to generate enough heat to meet the heat demand of the vehicle when the entire vehicle is stationary.
Another object of the first aspect of the present invention is to provide a motor active heating control method for a vehicle, which can fully utilize the heat generated by a motor to meet the heat demand of the vehicle when the whole vehicle is moving.
It is an object of a second aspect of the present invention to provide an active heating control system for an electric motor of a vehicle, which system enables the electric motor to generate sufficient heat to meet the heat demand of the vehicle when the entire vehicle is stationary.
An object of the third aspect of the present invention is to provide a vehicle, which adopts the above-mentioned motor active heating control method to control the heating of the motor or which includes the above-mentioned motor active heating control system, and which is capable of enabling the motor to generate enough heat to meet the heat demand of the vehicle when the whole vehicle is stationary.
According to a first aspect of the present invention, there is provided a motor active heating control method for a vehicle, comprising:
judging whether the vehicle has heat demand or not;
detecting an operating state of the vehicle;
if the vehicle has heat demand and is in a static state, controlling the direct-axis current of the motor to be alternating current and controlling the quadrature-axis current of the motor to be zero;
the direct-axis current of the motor is alternating current and the quadrature-axis current of the motor is zero, an alternating magnetic field parallel to a rotor magnetic field of the motor is formed inside the motor, and the motor does not output torque.
Further, before controlling the direct-axis current of the motor to be an alternating current and controlling the quadrature-axis current of the motor to be zero, the method further includes:
sending a heating instruction to a motor controller;
wherein the motor controller is used for controlling the motor to operate.
Further, still include:
if the vehicle has a heat demand and is in motion, the efficiency of the motor is reduced to generate the required heat.
Further, the reducing the efficiency of the motor comprises:
and calculating a target direct axis current and a target quadrature axis current to meet the heat requirement and simultaneously meet the torque output of the motor.
Further, before the reducing the efficiency of the motor, the method further comprises:
and sending a heating command to the motor controller.
Further, still include:
if the vehicle has no heat demand and is in a motion state, calculating the given quantity of the direct-axis current and the given quantity of the quadrature-axis current which are referenced according to an efficiency optimal mode;
and controlling the motor to generate the direct-axis current and the quadrature-axis current.
According to a second aspect of the present invention, there is provided an active heating control system for a motor of a vehicle, comprising:
the thermal management controller is positioned in the vehicle and used for detecting whether the vehicle has heat demand and sending the heat demand out;
the vehicle control unit is positioned in the vehicle and used for receiving the heat demand, detecting the running state of the vehicle and sending out a torque instruction and a heat instruction;
the motor controller is positioned in the vehicle and used for receiving the torque instruction and the heat instruction and controlling the motor to operate; and
the motor is positioned in the vehicle and used for generating direct-axis current and quadrature-axis current so as to meet the torque output and the heat demand.
According to a third aspect of the present invention, the present invention provides a vehicle, wherein the vehicle adopts the above motor active heating control method to control the heating of the motor or comprises the above motor active heating control system, and the motor active heating control system is connected with the vehicle body.
According to the active heating control method and system for the motor of the vehicle and the vehicle, when the vehicle is in a static state and the vehicle has a heat demand, the direct-axis current of the motor is controlled to be the alternating current, and the quadrature-axis current of the motor is controlled to be zero. In this way, an alternating magnetic field parallel to the rotor magnetic field of the motor is formed inside the motor, although the motor has no torque output, the current passing through the motor winding generates corresponding copper loss on the winding, and simultaneously, the existence of the pulse vibration magnetic field causes the stator iron core to generate corresponding eddy current loss and hysteresis loss, and the copper loss and the iron loss jointly form the heat productivity of the motor. Therefore, the purpose of enabling the motor to generate enough heat to meet the heat requirement of the vehicle when the whole vehicle is static is achieved. And when the vehicle is in need of heat, the PTC heating components are not needed to be used for heating, so that the manufacturing cost of the vehicle is greatly reduced, the mass of the vehicle is reduced, and the installation space of the vehicle is saved.
Further, when the vehicle is in motion and the vehicle has a heat demand, the required heat is generated by reducing the efficiency of the electric machine. Therefore, the heat generated by the motor is fully utilized to meet the heat requirement of the vehicle while the torque output of the motor is not influenced. Therefore, the energy utilization rate of the vehicle is effectively improved, and the endurance mileage of the vehicle is improved to a certain extent.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a flow chart of a motor active heating control method for a vehicle according to one embodiment of the present invention;
fig. 2 is a functional block diagram of a motor active heating control system for a vehicle according to one embodiment of the present invention.
Detailed Description
Fig. 1 is a flowchart of a motor active heat generation control method for a vehicle according to one embodiment of the present invention. As shown in fig. 1, the motor active heat generation control method for a vehicle includes:
judging whether the vehicle has heat demand;
detecting the running state of the vehicle;
if the vehicle has heat demand and is in a static state, controlling the direct-axis current of the motor to be alternating current and controlling the quadrature-axis current of the motor to be zero;
the direct-axis current of the motor is alternating current and the quadrature-axis current of the motor is zero, an alternating magnetic field parallel to a rotor magnetic field of the motor is formed inside the motor, and the motor does not output torque.
Herein, heat demand refers to a location on a vehicle where heat is needed, such as a passenger compartment, which requires elevated temperatures to ensure passenger comfort; for another example, the power battery needs a proper temperature to ensure the charge and discharge power.
Meanwhile, when the direct-axis current of the motor is alternating current and the quadrature-axis current of the motor is zero, an alternating magnetic field parallel to the rotor magnetic field of the motor is formed inside the motor, and the motor outputs no torque (representing that the vehicle is static). Meanwhile, the current passing through the winding of the motor generates corresponding copper loss on the winding, and the stator core generates corresponding eddy current loss and hysteresis loss due to the existence of the pulse vibration magnetic field, and the copper loss and the iron loss jointly form the heat productivity of the motor. The heat is finally transported by the cooling system to the heat demand, such as the passenger compartment and the power battery.
Therefore, the active heating control method for the motor of the vehicle can achieve the purpose that the motor generates enough heat to meet the heat requirement of the vehicle when the whole vehicle is static. And when the vehicle is in need of heat, the PTC heating components are not needed to be used for heating, so that the manufacturing cost of the vehicle is greatly reduced, the mass of the vehicle is reduced, and the installation space of the vehicle is saved.
Further, before the direct-axis current of the motor is controlled to be the alternating current and the quadrature-axis current of the motor is controlled to be zero, the control method may further include:
sending a heating instruction to a motor controller;
wherein the motor controller is used for controlling the motor to operate.
Therefore, the motor controller can conveniently and clearly control the target, so that the control process is smoothly and orderly carried out.
Meanwhile, as shown in fig. 1, the control method further includes:
if the vehicle has heat demand and is in a motion state, reducing the efficiency of the motor to generate the required heat;
the motor is controlled to generate corresponding direct-axis current and quadrature-axis current.
Therefore, the heat generated by the motor is fully utilized to meet the heat requirement of the vehicle while the torque output of the motor is not influenced. Therefore, the energy utilization rate of the vehicle is effectively improved, and the endurance mileage of the vehicle is improved to a certain extent.
Specifically, reducing the efficiency of the motor may include calculating a target direct axis current and a target quadrature axis current to meet the heat demand while meeting the torque output of the motor.
Therefore, the normal output of the motor torque is not influenced, and the heat generated by the motor just meets the heat requirement, so that the energy utilization rate of the vehicle is improved to a certain extent.
Also, in an embodiment of the present invention, before reducing the efficiency of the motor, the control method may further include:
and sending a heating command to the motor controller.
Therefore, the motor controller can conveniently and clearly control the target, so that the control process is smoothly and orderly carried out.
Further, it is understood that depending on the amount of heat required, the required amount of heat may sometimes be satisfied without reducing the efficiency of the motor. If the motor works normally, a certain amount of heat is generated, and if the required amount of heat is met, the cooling system can deliver the heat to the required position without specially reducing the efficiency of the motor.
Meanwhile, as shown in fig. 1, the control method may further include:
if the vehicle has no heat demand and is in a motion state, calculating the given quantity of the direct-axis current and the given quantity of the quadrature-axis current which are referenced according to an efficiency optimal mode;
and controlling the motor to generate the direct-axis current and the quadrature-axis current.
Therefore, the motor can output the required torque in the most energy-saving mode, and the energy utilization rate of the vehicle is improved to a certain extent.
Further, in one embodiment of the invention, an active heating control system for a motor of a vehicle is also provided. Fig. 2 is a functional block diagram of a motor active heating control system for a vehicle according to one embodiment of the present invention. As shown in fig. 2, the active heating control system for a motor of a vehicle includes a thermal management controller 1, a vehicle controller 2, a motor controller 3, and a motor 4. The thermal management controller 1 is located in a vehicle and is used for detecting whether the vehicle has heat demand and sending the heat demand out. The vehicle control unit 2 is located in the vehicle and used for receiving heat requirements, detecting the running state of the vehicle and sending out a torque instruction and a heat instruction. The motor controller 3 is located in the vehicle and used for receiving the torque instruction and the heat instruction and controlling the motor to operate. The motor 4 is located in the vehicle for generating direct and quadrature axis currents to meet torque output and heat demand.
Specifically, the thermal management controller 1 sends required heat to the vehicle controller 2, the vehicle controller 2 sends a torque instruction and a heat value instruction to the motor controller 3 according to the comprehensive vehicle state, the motor controller 3 calculates required direct axis current and quadrature axis current according to the received torque instruction and heat value instruction, and controls the direct axis current and the quadrature axis current through closed-loop control. The motor 4 finally generates a direct-axis current and a quadrature-axis current.
When the vehicle is in a static state, the heat management controller 1 sends a heating demand to the vehicle control unit 2, the vehicle control unit 2 sends a heating instruction to the motor controller 3 after integrating the vehicle state, and the motor controller 3 controls the direct-axis current to be alternating current and controls the quadrature-axis current to be zero. At this time, an alternating magnetic field parallel to the rotor magnetic field is formed inside the motor, so that the motor does not output torque at this time. The current in the winding generates copper loss on the stator winding of the motor, the alternating magnetic field causes the stator iron core to generate eddy current loss and magnetic hysteresis loss, the heat of the copper loss and the iron loss jointly form the heat productivity of the motor, and the heat is sent to the required part through the cooling system.
When the vehicle is in a moving state, if there is no heating demand, the heating demand sent by the thermal management controller 1 to the vehicle controller 2 is zero, and the heating instruction sent by the vehicle controller 2 to the motor controller 3 is zero. The motor controller 3 calculates the reference direct-axis current setting amount and quadrature-axis current setting amount in an efficiency-optimized manner. When the whole vehicle has a heating demand, the heat management controller 1 sends the heating demand to the whole vehicle controller 2, the whole vehicle controller 2 sends a heating instruction to the motor controller 3 after synthesizing the state of the whole vehicle, the motor controller 3 calculates a target direct axis current and a target quadrature axis current according to the demand of a torque instruction and the demand of heat productivity, and corresponding heat is provided under the condition of meeting the torque by actively reducing the motor efficiency.
Therefore, according to the motor active heating control system, through the arrangement of the thermal management controller 1, the vehicle control unit 2 and the motor controller 3, when a vehicle is in a static state and the vehicle has a heat demand, the direct-axis current of the motor is controlled to be alternating current, and the quadrature-axis current of the motor is controlled to be zero. Therefore, the purpose of enabling the motor to generate enough heat to meet the heat requirement of the vehicle when the whole vehicle is static is achieved. And when the vehicle is in need of heat, the PTC heating components are not needed to be used for heating, so that the manufacturing cost of the vehicle is greatly reduced, the mass of the vehicle is reduced, and the installation space of the vehicle is saved.
Further, when the vehicle is in motion and the vehicle has a heat demand, the required heat is generated by reducing the efficiency of the electric machine. Therefore, the heat generated by the motor is fully utilized to meet the heat requirement of the vehicle while the torque output of the motor is not influenced. Therefore, the energy utilization rate of the vehicle is effectively improved, and the endurance mileage of the vehicle is improved to a certain extent.
In addition, in an embodiment of the invention, a vehicle is further provided, and the vehicle includes a vehicle body, and the vehicle adopts the above motor active heating control method to control the heating of the motor or includes the above motor active heating control system, and the motor active heating control system is connected with the vehicle body.
The vehicle adopts the motor active heating control method to control the heating of the motor or comprises the motor active heating control system. Therefore, when the vehicle is in a static state and the vehicle has heat demand, the direct-axis current passing through the control motor is alternating current, and the quadrature-axis current of the control motor is zero. In this way, an alternating magnetic field parallel to the rotor magnetic field of the motor is formed inside the motor, and although the motor has no torque output, the current passing through the motor winding generates corresponding copper loss on the winding, and simultaneously, the stator core generates corresponding eddy current loss and hysteresis loss due to the existence of the pulse vibration magnetic field, and the copper loss and the iron loss jointly form the heat productivity of the motor. Therefore, the purpose of enabling the motor to generate enough heat to meet the heat requirement of the vehicle when the whole vehicle is static is achieved. And when the vehicle is in need of heat, the PTC heating components are not needed to be used for heating, so that the manufacturing cost of the vehicle is greatly reduced, the mass of the vehicle is reduced, and the installation space of the vehicle is saved.
Further, when the vehicle is in motion and the vehicle has a heat demand, the required heat is generated by reducing the efficiency of the electric machine. Therefore, the heat generated by the motor is fully utilized to meet the heat requirement of the vehicle while the torque output of the motor is not influenced. Therefore, the energy utilization rate of the vehicle is effectively improved, and the endurance mileage of the vehicle is improved to a certain extent.
Thus, it should be understood by those skilled in the art that while exemplary embodiments of the present invention have been illustrated and described in detail herein, many other variations or modifications which are consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (9)
1. An active heating control method for a motor of a vehicle, characterized by comprising:
judging whether the vehicle has heat demand or not;
detecting an operating state of the vehicle;
if the vehicle has heat demand and is in a static state, controlling the direct-axis current of the motor to be alternating current and controlling the quadrature-axis current of the motor to be zero;
the direct-axis current of the motor is alternating current and the quadrature-axis current of the motor is zero, an alternating magnetic field parallel to a rotor magnetic field of the motor is formed inside the motor, and the motor does not output torque.
2. The active heating control method of a motor according to claim 1, further comprising, before controlling the direct-axis current of the motor to be an alternating current and controlling the quadrature-axis current of the motor to be zero:
Sending a heating instruction to a motor controller;
wherein the motor controller is used for controlling the motor to operate.
3. The active motor heating control method of claim 1, further comprising:
if the vehicle has a heat demand and is in motion, the efficiency of the motor is reduced to generate the required heat.
4. The active heating control method of an electric machine of claim 3, wherein said reducing the efficiency of the electric machine comprises:
and calculating a target direct axis current and a target quadrature axis current to meet the heat requirement and simultaneously meet the torque output of the motor.
5. The active heating control method of an electric motor according to claim 3, further comprising, before said reducing the efficiency of the electric motor:
and sending a heating command to the motor controller.
6. The active motor heating control method of claim 1, further comprising:
if the vehicle has no heat demand and is in a motion state, calculating the given quantity of the direct-axis current and the given quantity of the quadrature-axis current which are referenced according to an efficiency optimal mode;
and controlling the motor to generate the direct-axis current and the quadrature-axis current.
7. An active motor heating control system for a vehicle, comprising:
the thermal management controller is positioned in the vehicle and used for detecting whether the vehicle has heat demand and sending the heat demand out;
the vehicle control unit is positioned in the vehicle and used for receiving the heat demand, detecting the running state of the vehicle and sending out a torque instruction and a heat instruction;
the motor controller is positioned in the vehicle and used for receiving the torque instruction and the heat instruction and controlling the motor to operate; and
the motor is positioned in the vehicle and used for generating direct-axis current and quadrature-axis current so as to meet the torque output and the heat demand.
8. A vehicle characterized in that the vehicle employs the motor active heat generation control method according to any one of claims 1 to 6 to control the motor heat generation.
9. A vehicle comprising a body, further comprising the active motor heating control system of claim 7, the active motor heating control system being coupled to the body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910334827.9A CN111865183A (en) | 2019-04-24 | 2019-04-24 | Motor active heating control method and system for vehicle and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910334827.9A CN111865183A (en) | 2019-04-24 | 2019-04-24 | Motor active heating control method and system for vehicle and vehicle |
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| CN111865183A true CN111865183A (en) | 2020-10-30 |
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| CN201910334827.9A Pending CN111865183A (en) | 2019-04-24 | 2019-04-24 | Motor active heating control method and system for vehicle and vehicle |
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| CN114080751A (en) * | 2020-11-24 | 2022-02-22 | 华为数字能源技术有限公司 | Motor controller, heat exchange system and current injection method |
| WO2022227422A1 (en) * | 2021-04-26 | 2022-11-03 | 比亚迪股份有限公司 | Electric drive system control method, electric drive system, and vehicle |
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Application publication date: 20201030 |