CN115912794A - Driving motor active cooling system, automobile and method - Google Patents
Driving motor active cooling system, automobile and method Download PDFInfo
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- CN115912794A CN115912794A CN202211737437.4A CN202211737437A CN115912794A CN 115912794 A CN115912794 A CN 115912794A CN 202211737437 A CN202211737437 A CN 202211737437A CN 115912794 A CN115912794 A CN 115912794A
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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Abstract
The application provides a driving motor active cooling system, an automobile and a method, wherein the cooling system comprises: the oil cooling machine shell is provided with a cooling oil duct between the oil cooling machine shell and the stator core and a spraying oil duct between the oil cooling machine shell and the end winding; the oil supply assembly is used for supplying cooling oil to the cooling oil duct and the spraying oil duct; an oil well pump; a temperature sensor; and the controller is used for acquiring the temperature of the end winding, controlling the oil supply assembly to supply oil to the cooling oil duct and the spraying oil duct when the temperature of the end winding is greater than a temperature rise threshold value, and controlling the oil well pump to return the cooling oil duct and the cooling oil in the spraying oil duct to the oil supply assembly. The application provides a driving motor active cooling system, car and method can cool off stator core and end winding simultaneously, promotes the cooling effect, can also carry out real-time supervision to end winding's temperature simultaneously, carries out the accuracy cooling to the motor.
Description
Technical Field
The application relates to the field of motor cooling, in particular to a driving motor active cooling system, an automobile and a method.
Background
The higher the temperature of the motor is, the higher the direct-current resistance of the winding of the stator or the rotor is, and the higher the loss is at the same current, so that the temperature of the motor is one of the key factors influencing the output power of the motor.
At present, there are two main types of oil cooling technologies for motor cooling in the market:
1. spraying the outlet part of the motor stator with cooling oil to cool the motor stator;
2. the cooling oil flows through the inside of the motor iron core so as to cool the iron core from the inside.
Among the above-mentioned two kinds of modes, the first kind can only cool off motor stator's the part of being qualified for the next round of competitions, can't cool off the high hot region in the middle of the motor core, and the second kind can't cool off the leading-out terminal of motor, and the heat mainly concentrates on stator core and end winding again in fact, and this makes two kinds of methods all have the problem that cooling efficiency is low, is difficult to effectively cool down for the motor.
Disclosure of Invention
The application provides a driving motor active cooling system, an automobile and a method, which aim to solve the problem that the motor is difficult to cool.
In order to solve the above problems, the following technical solutions are adopted in the present application:
a first aspect of an embodiment of the present application provides a driving motor active cooling system, the driving motor includes a stator core and an end winding, the cooling system includes:
the oil cooling machine shell is positioned on the outer sides of the stator core and the end windings, and a cooling oil duct is formed between the oil cooling machine shell and the stator core and a spraying oil duct is formed between the oil cooling machine shell and the end windings;
the oil supply assembly is used for supplying cooling oil to the cooling oil duct and the spraying oil duct;
the oil pump is used for sending the cooling oil in the cooling oil duct and the spraying oil duct back to the oil supply assembly for circulation;
a temperature sensor for acquiring a temperature of the end winding;
and the controller is used for acquiring the temperature of the end winding, controlling the oil supply assembly to supply oil to the cooling oil duct and the spraying oil duct when the temperature of the end winding is greater than a temperature rise threshold value, and controlling the oil pump to return the cooling oil duct and the cooling oil in the spraying oil duct to the oil supply assembly until the temperature of the end winding is less than or equal to the temperature rise threshold value.
In one possible design, the controller is specifically configured to:
and controlling the oil supply assembly to supply oil to the cooling oil duct and the spraying oil duct until the temperature of the end winding is less than a set threshold value, and starting the oil well pump (301) to return the cooling oil duct and the cooling oil in the spraying oil duct to the oil supply assembly.
In one possible design, the oil supply assembly includes an oil tank and an electromagnetic valve for controlling an oil outlet of the oil tank to open and close, and in a vertical direction, a cooling oil level in the oil tank is located above the motor, and the controller is specifically configured to:
and when the temperature of the end winding is greater than the temperature rise threshold value, the electromagnetic valve is controlled to be opened, so that the cooling oil in the oil tank enters the cooling oil duct and the spraying oil duct.
In a possible design, a spiral groove extending along the axial direction of the driving motor is arranged on the oil cooling shell, and when the oil cooling shell is annularly arranged on the outer side of the stator core, the cooling oil duct is formed between the spiral groove and the stator core.
In a possible design, the oil-cooled casing with interference fit between the stator core, just it is sealed to be provided with sealed glue between oil-cooled casing and the stator core.
In one possible design, a cavity communicated with the cooling oil duct is formed between the oil cooling machine shell and the end winding, the spraying oil duct comprises an oil distribution ring which divides the cavity into an oil storage cavity and a spraying cavity, the spraying cavity is connected with the end winding, and a plurality of spraying oil holes communicated with the oil storage cavity and the spraying cavity are uniformly distributed in the oil distribution ring;
the cooling oil duct is provided with a cooling oil inlet and a cooling oil outlet, the oil supply assembly is connected with the cooling oil inlet, and the oil well pump is connected with the cooling oil outlet.
In one possible design, the inner diameter of the spray oil hole is gradually reduced toward the direction close to the spray cavity.
The second aspect of the embodiment of the present application provides an automobile, which includes a driving motor and any one of the driving motor active cooling systems of the first aspect, wherein the driving motor active cooling system is used for cooling the driving motor.
A third aspect of the present application provides an active cooling method for a driving motor, which is applied to the active cooling system for a driving motor according to any one of the first aspect of the embodiments of the present application, and includes:
acquiring the temperature of the end winding;
and if the temperature of the end winding is greater than the temperature rise threshold value, controlling the oil supply assembly to supply cooling oil to the cooling oil duct and the spraying oil duct, and controlling the oil pump to return the cooling oil duct and the cooling oil in the spraying oil duct to the oil supply assembly for circulation until the temperature of the end winding is less than the temperature rise threshold value, and controlling the oil supply assembly and the oil pump to stop working.
In one possible design, before the oil well pump is started to send the cooling oil in the cooling oil passage and the spraying oil passage back to the oil supply assembly for circulation, the oil well pump comprises:
acquiring the temperature of the end winding;
and if the temperature of the end winding is less than a set threshold value, starting the oil well pump.
The beneficial effect of this application: the application provides a driving motor active cooling system, an automobile and a method, the driving motor active cooling system comprises an oil cooling machine shell, an oil supply assembly, an oil well pump, a temperature sensor and a controller, a cooling oil duct is formed between the oil cooling machine shell and a stator iron core, a spraying oil duct is formed between the oil cooling machine shell and an end winding, when the driving motor active cooling system is used, the controller obtains the temperature of the end winding through the temperature sensor, when the temperature of the end winding is larger than a temperature rise threshold value, the oil supply assembly is controlled to be the cooling oil duct, the spraying oil duct supplies oil, the oil well pump is controlled to return the cooling oil duct and the cooling oil in the spraying oil duct to the oil supply assembly for circulation until the temperature of the end winding is smaller than or equal to the temperature rise threshold value, in the cooling process, the cooling oil directly contacts with the stator iron core, the cooling efficiency can be directly cooled, meanwhile, the temperature of the motor can be monitored in real time through the temperature sensor, the motor is accurately cooled, and the operation performance of the motor is guaranteed.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present application, nor do they limit the scope of the present application. Other features of the present application will become apparent from the following description.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic structural diagram of an active cooling system of a driving motor according to an embodiment of the present application;
fig. 2 is a first schematic flowchart of an active cooling system of a driving motor according to an embodiment of the present disclosure;
fig. 3 is a schematic view of a working flow of an active cooling system of a driving motor according to an embodiment of the present application.
Reference numerals:
101-end winding, 102-oil cooling machine shell, 103-stator core, 201-spraying oil channel, 202-cooling oil channel, 301-oil pump, 302-oil filter, 303-oil tank, 304-electromagnetic valve, 305-temperature sensor, 306-motor controller, 307-vehicle controller.
With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application.
First, some terms related to the embodiments of the present application are explained as follows:
a stator core: the motor consists of a stator and a rotor, wherein the stator is used for generating alternating current, and the rotor is used for forming a rotating magnetic field. The stator is a static part of the motor and consists of a stator core, a stator winding and a base, wherein the stator core is an important part of the stator and is also a main component of a magnetic circuit of the motor and mainly consists of a fan-shaped sheet, a ventilation slot sheet, a positioning rib, an upper tooth pressing plate, a lower tooth pressing plate, a tension bolt, a supporting plate and other parts.
End winding: the stator winding protrudes from the end of the stator.
At present, oil is a comparatively commonly used cooling method in the motor cooling, in the correlation technique, mainly sprays the motor copper line through the cooling oil to the appearance part of cooling motor stator, or through inside the cooling oil flow passes through motor core, these two kinds of modes all can only cool off partly of motor, lead to cooling efficiency lower, are difficult to reach the motor cooling effect of ideal.
And the driving motor initiative cooling system that provides in this application includes the oil cooler casing, the fuel feeding subassembly, the oil-well pump, temperature sensor and controller, form the cooling oil duct between oil cooler casing and the stator core, and form the spray oil duct between the end winding, when using, the controller obtains the temperature of end winding through temperature sensor, and when the temperature of end winding is greater than the temperature rise threshold value, control fuel feeding subassembly is the cooling oil duct, spray oil duct fuel feeding, control the oil-well pump and send the cooling oil in cooling oil duct, the spray oil duct back to the fuel feeding subassembly and circulate, until the temperature of end winding is less than or equal to the temperature rise threshold value. Can cool off stator core and end winding simultaneously through cooling oil duct, the oil duct that sprays, promote the cooling effect of motor, simultaneously, in the cooling process, the direct and stator core contact of cooling oil can directly cool off stator core, further promotes cooling efficiency, in addition, can also carry out real time monitoring to motor temperature through temperature sensor to carry out the accuracy to the motor and cool down, guarantee the operating property of motor.
The technical solutions of the embodiments of the present application will be described in detail below with reference to the accompanying drawings, wherein it is to be understood that the following embodiments may be arbitrarily combined, and similar designs may not be repeatedly described with respect to different embodiments.
Fig. 1 is a schematic structural diagram of a driving motor active cooling system according to an embodiment of the present disclosure, please refer to fig. 1, and the driving motor active cooling system according to the embodiment includes an oil cooling housing 102, an oil supply assembly, an oil pump 301, a temperature sensor 305, and a controller.
It can be understood that the active cooling system of the driving motor according to the embodiment of the present application is mainly used for cooling the motor, and the motor includes the stator core 103 and the end winding 101.
Specifically, the oil-cooled casing 102 is located outside the stator core 103 and the end winding 101, and a cooling oil passage 202 is formed between the oil-cooled casing 102 and the stator core 103, and a spray oil passage 201 is formed between the oil-cooled casing 102 and the end winding 101, that is, cooling oil can contact with the stator core 103 through the cooling oil passage 202, and contact with the end winding 101 through the spray oil passage 201, so as to cool the motor; the oil supply assembly stores cooling oil, is connected with the cooling oil duct 202 and the spraying oil duct 201, and is used for supplying the cooling oil to the cooling oil duct 202 and the spraying oil duct 201 when the motor is cooled; the oil well pump 301 is also connected with the cooling oil duct 202 and the spraying oil duct 201, and the cooling oil in the cooling oil duct 202 and the spraying oil duct 201 is sent back to the oil supply assembly in the cooling process to assist the circulation of the cooling oil; the temperature sensor 305 is arranged at the end winding 101 of the motor, that is, the temperature sensor 305 is connected to the three-phase winding of the motor to measure the temperature of the end winding 101 in real time and send the temperature to the controller; the controller is used for receiving the temperature of the end winding 101, controlling the oil supply assembly to supply oil to the cooling oil duct 202 and the spraying oil duct 201 when the temperature of the end winding 101 is greater than the temperature rise threshold, and controlling the oil pump 301 to return the cooling oil in the cooling oil duct 202 and the spraying oil duct 201 to the oil supply assembly until the temperature of the end winding 101 is less than or equal to the temperature rise threshold.
Through the scheme, at least the following effects can be achieved:
1. when the temperature of the motor is too high, the stator core 103 and the end winding 101 can be cooled through the cooling oil duct 202 and the spraying oil duct 201, so that the cooling effect of the cooling system is greatly improved, and the motor can be assisted to be cooled more quickly;
2. after entering the cooling oil duct 202, the cooling oil can directly contact the stator core 103, so that the cooling effect of the stator core can be improved, and the cooling efficiency of the cooling system is further improved;
3. the temperature of the motor can be monitored in real time through the temperature sensor 305, so that the motor is accurately cooled, and the running performance of the motor is guaranteed.
As a specific implementation manner of the oil supply assembly, the oil supply assembly includes an oil tank 303 and an electromagnetic valve 304 for controlling an oil outlet of the oil tank 303 to open and close, and in the vertical direction, a liquid level of cooling oil in the oil tank 303 is located above the motor, and as long as the electromagnetic valve 304 is opened, the cooling oil in the oil tank 303 can automatically flow into the cooling oil duct 202 and the spraying oil duct 201 under the action of gravity, which not only helps to reduce cost, but also reduces a space occupied by the cooling system, and is convenient to arrange on an automobile. In addition, when oil needs to be supplied to the cooling oil passage 202 and the spraying oil passage 201, the controller can directly control the electromagnetic valve 304 to be opened, and when the oil needs to be stopped, the controller can control the electromagnetic valve 304 to be closed, so that the control is very simple.
In addition, an oil filter 302 can be arranged between the oil well pump 301 and the oil tank 303 for filtering so as to remove impurities in the cooling oil and prevent the cooling oil from blocking a pipeline. The oil tank 303 may also be connected to a heat exchange device to adjust the temperature of the cooling oil.
Of course, the oil supply unit may also be a combination of the oil tank 303 and the pump, and the pump sends the cooling oil into the cooling oil duct 202 and the spray oil duct 201 to cool the motor.
On the basis of the above embodiment, the oil-cooled casing 102 is provided with the spiral groove extending along the axial direction of the driving motor, and when the oil-cooled casing 102 is annularly arranged outside the stator core 103, the cooling oil passage 202 is formed between the spiral groove and the stator core 103. The cooling oil flows in the spiral groove and contacts with the stator core 103 to cool the stator core 103, and the cooling oil passage 202 is provided as the spiral groove, so that the cooling oil can be effectively conveyed to cool the stator core 103 while the deformation resistance of the oil-cooled casing 102 is ensured.
Of course, it is understood that there are sealed connections between the oil-cooled casing 102 and the stator core 103, and between the oil-cooled casing 102 and the end windings 101, to prevent leakage of cooling oil, for example by sealing rings at the ends. For the convenience of installation, the oil cooling housing 102 and the stator core 103 may be in interference fit, and a sealant may be disposed between the oil cooling housing 102 and the stator core 103 for sealing.
As a specific embodiment of the spray oil passage 201, a cavity communicating with the cooling oil passage 202 is formed between the oil-cooled casing 102 and the end winding 101, and cooling oil may flow between the cooling oil passage 202 and the spray oil passage 201. The spraying oil duct 201 comprises an oil distribution ring which divides the cavity into an oil storage cavity and a spraying cavity, the spraying cavity is connected with the end winding 101, namely the spraying cavity surrounds the outer side of the end winding 101, the oil storage cavity surrounds the outer side of the spraying cavity, a plurality of spraying oil holes which are communicated with the oil storage cavity and the spraying cavity are uniformly distributed in the oil distribution ring, a cooling oil inlet and a cooling oil outlet are formed in the cooling oil duct 202, the oil supply assembly is connected with the cooling oil inlet, and the oil well pump 301 is connected with the cooling oil outlet.
When the motor is cooled, cooling oil enters the cooling oil duct 202 from the cooling oil inlet, enters the oil storage cavity through the cooling oil duct 202, is sprayed into the spraying cavity through the spraying oil hole to be contacted with the end winding 101, so that the end winding 101 is cooled, the oil well pump 301 extracts the cooling oil which exchanges heat with the motor in the spraying oil duct 201 and the cooling oil duct 202 through the cooling oil outlet and sends the cooling oil back to the oil tank 303 for circulation, in the whole process, the oil distribution ring is right opposite to the end winding 101, and the cooling oil is sprayed on the end winding 101 through the spraying oil hole, so that the end winding 101 can be effectively cooled.
The number of the spray oil holes on the oil distribution ring can be designed according to the actual cooling requirement, such as 6, 8, 10 and the like. In addition, the inner diameter of the spraying oil hole can be gradually reduced towards the direction close to the spraying cavity, and the spraying speed of the cooling oil can be effectively increased due to the conical design of the spraying oil hole 2, so that the cooling effect of the spraying oil hole on the end winding 101 is improved.
Fig. 2 is a first control flow diagram of an active cooling system of a driving motor according to an embodiment of the present disclosure, and referring to fig. 2, based on the active cooling system of the driving motor according to the embodiment, an active cooling method of the driving motor according to the present embodiment includes the following steps:
s201, acquiring the temperature of the end winding 101.
Specifically, the temperature sensor 305 may be connected to the three-phase winding of the motor, and the temperature of the end winding 101 may be acquired by the temperature sensor 305.
S202, determining whether to start the oil supply assembly and the oil pump 301 according to the temperature of the end winding 101.
Specifically, in the running process of the motor, if the end winding 101 received by the controller is smaller than or equal to the temperature rise threshold, it indicates that the current temperature of the motor does not affect the performance of the motor, and cooling is not needed;
and when the temperature of the end winding 101 received by the controller is greater than the temperature rise threshold, it indicates that the temperature of the motor is too high at this time, the normal operation of the motor is affected, and the temperature needs to be reduced, so as to ensure the operation performance of the motor. At this time, the controller controls the oil supply assembly to convey cooling oil into the cooling oil duct 202 and the spraying oil duct 201 to cool the motor, and the controller oil pump 301 extracts the cooling oil from the cooling oil duct 202 and the spraying oil duct 201 and conveys the cooling oil to the oil supply assembly again for circulation so as to cool the motor until the temperature of the motor is no longer higher than the temperature rise threshold value, thereby ensuring the operation performance of the motor.
Fig. 3 is a schematic control flow diagram of a second active cooling system of a driving motor according to an embodiment of the present application, please refer to fig. 3, in which the active cooling method of the driving motor according to the embodiment of the present application includes the following steps:
s301, acquiring the temperature of the end winding 101.
Specifically, the temperature sensor 305 is connected to the three-phase winding of the motor, and directly measures the temperature of the end winding 101, and the controller receives a signal from the temperature sensor 305 and acquires the temperature of the end winding 101.
S302, if the temperature of the end winding 101 is larger than the temperature rise threshold value, the electromagnetic valve 304 is controlled to be opened, and the oil tank 303 supplies cooling oil to the cooling oil duct 202 and the spraying oil duct 201.
Specifically, in the running process of the motor, after the controller obtains the temperature of the end winding 101, the temperature of the end winding 101 is compared with the temperature rise threshold, if the temperature of the end winding 101 is smaller than the temperature rise threshold, the temperature of the motor does not need to be reduced, step S301 is repeated, the temperature of the end winding 101 is obtained, and the temperature of the motor is monitored.
If the temperature of the end winding 101 is higher than the temperature rise threshold value, the electromagnetic valve 304 is controlled to be opened, so that the cooling oil automatically flows into the cooling oil duct 202 from the oil tank 303, enters the spraying oil duct 201 through the cooling oil duct 202, and cools the stator core 103 and the end winding 101 synchronously, so that the temperature of the motor is rapidly reduced.
The temperature rise threshold is a temperature value or a temperature range value which is actually calibrated according to parameters of the motor and does not affect the operation performance of the motor, and the temperature of the motor is continuously controlled at the temperature or within the temperature range through monitoring of the temperature sensor 305, so that the operation performance of the motor is guaranteed.
And S303, continuously acquiring the temperature of the end winding 101, if the temperature of the end winding 101 is less than a set threshold value, starting the oil well pump 301 to send cooling oil in the cooling oil duct 202 and the spraying oil duct 201 back to the oil tank 303 for circulation until the temperature of the end winding 101 is less than or equal to a temperature rise threshold value, and closing the electromagnetic valve 304 and the oil well pump 301.
Specifically, the cooling oil circulates mainly by means of the oil pump 301, the cooling oil enters the cooling oil duct 202 for a period of time, so that the cooling oil has sufficient time to exchange heat with the stator core 103 and the end winding 101, the temperature of the motor is reduced to be below a set threshold value, the oil pump 301 is started to return the cooling oil in the cooling oil duct 202 and the spraying oil duct 201 to the oil tank 303 for circulation, the motor is cooled, and when the temperature of the end winding 101 is reduced to be below a temperature rise threshold value, it is indicated that the current temperature of the motor does not affect the performance of the motor, the electromagnetic valve 304 and the oil pump can be closed, and the motor is stopped from being cooled.
The threshold is set to a preset temperature value or temperature range value, which is slightly higher than the temperature rise threshold.
The active cooling system of the driving motor can be used for all motors, especially for the current new energy automobiles. When the temperature sensor is used on an automobile, the controller CAN be composed of a vehicle controller 307 and a motor controller 306, after the temperature sensor 305 measures the temperature of the end winding 101, the temperature sensor performs one-way signal transmission with the motor controller 306 through a low-voltage electric signal, the motor controller 306 interacts with the vehicle controller 307 through a CAN bus, after the motor controller 306 receives the temperature of the end winding 101 measured by the temperature sensor 305, the temperature is compared with a temperature rise threshold value, if the temperature of the end winding 101 is larger than the temperature rise threshold value, the vehicle controller 307 controls the electromagnetic valve 304 to be opened, so that cooling oil enters the cooling oil duct 202 and the spraying oil duct 201 to cool the motor.
Specifically, when the motor runs, the temperature of the motor rises, the temperature sensor 305 measures the temperature of the end winding and feeds the temperature to the motor controller 306, the motor controller 306 compares the temperature values, if the temperature value of the end winding fed back by the temperature sensor 305 is higher than a preset temperature rise threshold value of the motor controller 306, the motor controller 305 sends an instruction to the vehicle controller 307 through the CAN bus, the vehicle controller 307 controls the electromagnetic valve to be opened, cooling oil enters the cooling oil duct 202 and the spray oil duct 201, cools the stator core 103 and the end winding 102, when the temperature of the end winding is smaller than the preset threshold value, the oil pump 303 starts to work, the cooling oil entering the cooling oil duct 202 and the spray oil duct 201 enters the oil filter 302 under the action of the oil pump 303, the cooling oil enters the oil tank 303 after being filtered, the oil tank 303 is connected with a heat exchange device, so that the cooling oil completes the complete cooling oil circulation in the motor, and if the temperature value fed back by the temperature sensor 305 is lower than the preset threshold value of the motor controller 306, the oil pump 307 closes the electromagnetic valve 304 and the oil pump controller 301.
In addition, the controller may also be provided separately, and includes at least a memory and a processor, where the memory stores a computer software program, and the processor executes the computer software program stored in the memory, so as to implement the active cooling method for the driving motor.
The processor may be a central processing unit, or may be other general-purpose processors, digital signal processors, application specific integrated circuits, and the like. A general purpose processor may be a microprocessor, or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present application may be embodied directly in a hardware processor, or in a combination of the hardware and software modules in the processor.
The memory may comprise high speed RAM memory and may also include non-volatile storage NVM, such as at least one disk memory.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present disclosure may be executed in parallel, sequentially, or in different orders, as long as the desired results of the technical solutions disclosed in the present disclosure can be achieved, and the present disclosure is not limited herein.
The above-described embodiments are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made, depending on design requirements and other factors. Any modifications, equivalents, improvements, etc. that come within the spirit of the disclosure are intended to be included within the scope of the disclosure.
Claims (10)
1. An active cooling system for a drive motor, the drive motor including a stator core and an end winding, the cooling system comprising:
the oil cooling machine shell is positioned on the outer sides of the stator core and the end winding, and a cooling oil duct is formed between the oil cooling machine shell and the stator core and a spraying oil duct is formed between the oil cooling machine shell and the end winding;
the oil supply assembly is used for supplying cooling oil to the cooling oil duct and the spraying oil duct;
the oil pump is used for sending the cooling oil in the cooling oil duct and the spraying oil duct back to the oil supply assembly for circulation;
a temperature sensor for acquiring a temperature of the end winding;
and the controller is used for acquiring the temperature of the end winding, controlling the oil supply assembly to supply oil to the cooling oil duct and the spraying oil duct when the temperature of the end winding is greater than the temperature rise threshold value, and controlling the oil well pump to return the cooling oil duct and the cooling oil in the spraying oil duct to the oil supply assembly until the temperature of the end winding is less than or equal to the temperature rise threshold value.
2. The active cooling system of a drive motor of claim 1, wherein the controller is specifically configured to:
and controlling the oil supply assembly to supply oil to the cooling oil duct and the spraying oil duct until the temperature of the end winding is less than a set threshold value, and starting the oil well pump to return the cooling oil in the cooling oil duct and the spraying oil duct to the oil supply assembly.
3. The active cooling system for the driving motor according to claim 1 or 2, wherein the oil supply assembly includes an oil tank and an electromagnetic valve for controlling an oil outlet of the oil tank to open and close, and in a vertical direction, a cooling oil level in the oil tank is located above the motor, and the controller is specifically configured to:
and when the temperature of the end winding is greater than the temperature rise threshold value, the electromagnetic valve is controlled to be opened, so that the cooling oil in the oil tank enters the cooling oil duct and the spraying oil duct.
4. The active cooling system for the driving motor according to claim 1, wherein a spiral groove extending in an axial direction of the driving motor is provided on the oil-cooled housing, and when the oil-cooled housing is annularly provided on an outer side of the stator core, the cooling oil passage is formed between the spiral groove and the stator core.
5. The active cooling system for driving motor of claim 4, wherein the oil-cooled casing and the stator core are in interference fit, and a sealant is disposed between the oil-cooled casing and the stator core for sealing.
6. The active cooling system for the driving motor according to claim 4, wherein a cavity communicated with the cooling oil passage is formed between the oil cooler shell and the end winding, the spray oil passage comprises an oil distribution ring which divides the cavity into an oil storage cavity and a spray cavity, the spray cavity is connected with the end winding, and a plurality of spray oil holes which are communicated with the oil storage cavity and the spray cavity are uniformly distributed on the oil distribution ring;
the cooling oil duct is provided with a cooling oil inlet and a cooling oil outlet, the oil supply assembly is connected with the cooling oil inlet, and the oil well pump is connected with the cooling oil outlet.
7. The active cooling system of a driving motor according to claim 6, wherein the inner diameter of the spray oil hole is gradually reduced toward the spray chamber.
8. An automobile, characterized by comprising a drive motor and a drive motor active cooling system according to any one of claims 1 to 7 for cooling the drive motor.
9. An active cooling method of a driving motor, applied to the active cooling system of a driving motor according to any one of claims 1 to 7, comprising:
acquiring the temperature of the end winding;
and if the temperature of the end winding is greater than the temperature rise threshold value, controlling the oil supply assembly to supply cooling oil to the cooling oil duct and the spraying oil duct, and controlling the oil pump to return the cooling oil duct and the cooling oil in the spraying oil duct to the oil supply assembly for circulation until the temperature of the end winding is less than the temperature rise threshold value, and controlling the oil supply assembly and the oil pump to stop working.
10. The active cooling method for the driving motor according to claim 9, before the oil pump is started to return the cooling oil in the cooling oil passage and the spraying oil passage to the oil supply assembly for circulation, the method comprises the following steps:
acquiring the temperature of the end winding;
and if the temperature of the end winding is less than a set threshold value, starting the oil well pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211737437.4A CN115912794A (en) | 2022-12-29 | 2022-12-29 | Driving motor active cooling system, automobile and method |
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| CN202211737437.4A CN115912794A (en) | 2022-12-29 | 2022-12-29 | Driving motor active cooling system, automobile and method |
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| CN115912794A true CN115912794A (en) | 2023-04-04 |
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| CN202211737437.4A Pending CN115912794A (en) | 2022-12-29 | 2022-12-29 | Driving motor active cooling system, automobile and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117240006A (en) * | 2023-09-21 | 2023-12-15 | 深圳沃新智创科技有限公司 | Cooling motor system with temperature monitoring function |
-
2022
- 2022-12-29 CN CN202211737437.4A patent/CN115912794A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117240006A (en) * | 2023-09-21 | 2023-12-15 | 深圳沃新智创科技有限公司 | Cooling motor system with temperature monitoring function |
| CN117240006B (en) * | 2023-09-21 | 2024-05-14 | 深圳沃新智创科技有限公司 | Cooling motor system with temperature monitoring function |
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