CN109774458B - Motor and controller cooling system and method - Google Patents
Motor and controller cooling system and method Download PDFInfo
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- CN109774458B CN109774458B CN201711128233.XA CN201711128233A CN109774458B CN 109774458 B CN109774458 B CN 109774458B CN 201711128233 A CN201711128233 A CN 201711128233A CN 109774458 B CN109774458 B CN 109774458B
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Abstract
The invention relates to a motor and controller cooling system and a method, and belongs to the technical field of cooling of automobile driving systems. It comprises a cooling pack assembly; the two ends of the circulating loop are respectively connected with a high-level interface and a low-level interface of the cooling package assembly, and the circulating loop comprises a water pump arranged in series, and a first branch and a second branch which are mutually connected in parallel; and an expansion tank connecting the cooling pack assembly and the circulation loop; the first branch comprises an integrated controller and a generator which are arranged in series, and the integrated controller is positioned in front of the generator; the second branch comprises a drive motor. The present invention uses a cooling system. Meanwhile, the flow and heat dissipation requirements of the controller and the generator can be met, and the flow and heat dissipation requirements of the driving motor can be met.
Description
Technical Field
The invention relates to a motor and controller cooling system and a method, and belongs to the technical field of cooling of automobile driving systems.
Background
There are two main types of conventional cooling methods for current automotive electric drive systems. The first type is that a generator and a driving motor are arranged in series, and a generator controller and a driving motor controller are arranged in series to form independent cooling systems. However, this method has the disadvantage of large occupied space, and each cooling system uses a water pump, a radiator and one or more electronic fans to pump and disperse heat, which results in high production cost. The second one is that the controller, the generator and the driving motor are arranged in series to form a set of cooling system, and a water pump, a radiator and one or more electronic fans are used for heat extraction and dispersion. However, the cooling system has the disadvantages that the internal resistances of the controller and the driving motor controller are large, one water pump provides circulating water for the cooling system, the flow rate is insufficient, and the heat dissipation requirements of the controller, the generator and the driving motor under the high-temperature limit working conditions cannot be met.
In addition, the electronic fan cover of the electrically driven cooling system of the automobile is arranged on the radiator, and the gap between the electronic fan cover and the core body of the radiator has important influence on the cooling effect of the radiator and the service life of the electronic fan. The gap between the existing electronic fan cover and the radiator core body is often larger, so that hot air backflow or air leakage is caused, and the cooling effect of the radiator is reduced. On the other hand, when the installation position of the radiator is low, sand and dust or sundries on the ground are easily sucked into the electronic fan cover and adsorbed on the electronic fan blades or enter the electronic fan motor, so that the bearing of the electronic fan is abraded early, the electronic fan blades do not move in an balanced manner, the radiator is impacted too much, and the radiator is easy to crack and leak water. If the clearance between the electronic fan cover and the radiator core is too small, the electronic fan cover often crushes the radiator core due to the problem of manufacturing errors, and the radiator leaks water.
Currently, in an electrically driven cooling system for an automobile, a temperature sensor is generally arranged at a water inlet and a water outlet of a radiator and used for sensing the water temperature at the water inlet and the water outlet of the radiator, so as to control the electronic fan to be turned on and off to radiate heat of components of the electrically driven cooling system. The water temperature control method has the defects that the water temperature has delay property compared with the temperature of the stator coil of the generator and the driving motor and the temperature of the IGBT of the generator controller and the driving motor controller, and a temperature difference exists, the temperature difference can change along with the change of the running working condition of the vehicle, and the control algorithm is difficult to grasp accurately. Therefore, in the actual running process of the vehicle, the situation that the water temperature is not high, and the high-temperature power limit condition already occurs in the generator, the driving motor stator coil, the generator controller and the driving motor controller IGBT, so that the normal running of the vehicle is influenced.
Disclosure of Invention
In order to solve the problems, the invention provides a motor and controller cooling system which uses a set of cooling system. Meanwhile, the flow and heat dissipation requirements of the integrated controller and the generator can be met, and the flow and heat dissipation requirements of the driving motor can be met.
According to one aspect of the present invention, there is provided a motor and controller cooling system comprising:
a cooling pack assembly;
the two ends of the circulating loop are respectively connected with a high-level interface and a low-level interface of the cooling package assembly, and the circulating loop comprises a water pump arranged in series, and a first branch and a second branch which are mutually connected in parallel; and
an expansion tank connecting the cooling pack assembly and the circulation loop;
the first branch comprises an integrated controller and a generator which are arranged in series, and the integrated controller is positioned in front of the generator; the second branch comprises a drive motor.
The invention is further improved in that: the cooling pack assembly comprises a radiator, an air protecting ring arranged on the radiator and an electronic fan arranged in the air protecting ring; wherein, the radiator is connected with the air protection ring through a sealing component.
The invention is further improved in that: the sealing assembly comprises a clamping sleeve coated on the edge of the wind protection ring and an elastic boss arranged on the clamping sleeve; wherein the heat sink compresses the elastic boss and places the elastic boss in a compressed state.
The invention is further improved in that: the clamping sleeve is provided with a clamping groove with a U-shaped section, and a plurality of inverted teeth used for clamping the edge of the wind protection ring are arranged in the clamping groove.
The invention is further improved in that: the upper edge and the lower edge of the wind protection ring are respectively provided with a plurality of connecting pieces, and each connecting piece is provided with a U-shaped hole; the two sides of the wind protection ring are provided with bending edges, and the width of each bending edge is the same as the depth of the corresponding clamping groove.
The invention is further improved in that: the second branch is provided with two butterfly handle ball valves which are respectively arranged at the water inlet and the water outlet of the integrated controller.
The invention is further improved in that: and a first exhaust valve connected with the expansion water tank is arranged at the top of the radiator, and a second exhaust valve connected with the expansion water tank is arranged at a water outlet of the driving motor of the second branch.
The invention is further improved in that: the integrated controller is integrated with a generator controller for controlling the generator to operate, a driving motor controller for controlling the driving motor to operate and a vehicle control unit for controlling the water pump and the cooling package assembly.
The invention is further improved in that: a generator temperature sensor is arranged near a water outlet of the generator and used for sensing the temperature of a stator coil of the generator; a driving motor temperature sensor is arranged near the water outlet of the driving motor and used for sensing the temperature of a stator coil of the driving motor; a generator controller temperature sensor is arranged near the water outlet of the generator controller and used for sensing the temperature of the IGBT; a driving motor controller temperature sensor is arranged near the water outlet of the driving motor controller and used for sensing the temperature of the IGBT;
the driving motor temperature sensor and the driving motor controller temperature sensor are respectively connected with the driving motor controller; the generator temperature sensor and the generator controller temperature sensor are respectively connected with the generator controller.
According to another aspect of the present invention, there is provided a motor and controller cooling control method including:
the method comprises the following steps: installing a cooling system according to the motor and the controller on the automobile;
step two: setting a plurality of water pump starting preset temperatures which respectively correspond to the driving motor temperature, the driving motor controller temperature, the generator temperature and the generator controller temperature, and starting the water pumps when any actual temperature is higher than the corresponding water pump starting preset temperature;
setting a plurality of water pump closing preset temperatures which respectively correspond to the driving motor temperature, the driving motor controller temperature, the generator temperature and the generator controller temperature, and closing the water pumps when all the actual temperatures are lower than the corresponding water pump closing preset temperatures;
setting a plurality of electronic fan starting preset temperatures which respectively correspond to the driving motor temperature, the driving motor controller temperature, the generator temperature and the generator controller temperature, and starting the electronic fans when any actual temperature is higher than the corresponding electronic fan starting preset temperature;
and setting a plurality of electronic fan closing preset temperatures respectively corresponding to the driving motor temperature, the driving motor controller temperature, the generator temperature and the generator controller temperature, and closing the electronic fans when all the actual temperatures are lower than the corresponding electronic fan closing preset temperatures.
Compared with the prior art, the invention has the advantages that:
in the motor and controller cooling system of the present invention, the integrated controller and the generator are connected in series to form a first branch circuit, and the integrated controller must be located in front of the generator because the water inlet temperature required by the integrated controller is lower than the water inlet temperature of the generator. And then the second branch circuit is connected with a driving motor in parallel, so that the motor cooling system and the controller cooling system are combined into a cooling system. On the one hand, the sum of the heat productivity of the integrated controller and the generator is equivalent to the heat productivity of the driving motor. On the other hand, the minimum sectional area of a branch consisting of the integrated controller and the power generation is equivalent to the minimum sectional area of a branch of the driving motor. In addition, the embodiment adopts a parallel connection mode, so that the flow entering the radiator assembly of the whole system can be maximized, and the radiating effect of the radiator is improved. Therefore, the integrated controller and the generator are connected in series to form a branch and then connected with the driving motor in parallel, the internal resistance of the pipeline arrangement system is small, the total flow of the cooling system is improved, and the flow of the system can meet the flow and heat dissipation requirements of the integrated controller and the generator and the flow and heat dissipation requirements of the driving motor. Therefore, the cooling bag assembly with the large heat dissipation area is used for heat dissipation, the pipeline trend is simplified, the requirement on arrangement space is smaller, the production cost is saved, and the integrated controller, the generator and the driving motor can be in a good heat dissipation state.
In the cooling system of the motor and the controller, a sealing part is arranged between the air protecting ring and the radiator. The sealing assembly is extruded and deformed through the upper and lower boundaries and the left and right boundaries of the elastic lug boss and the radiator, so that a gap between the wind protection ring and the radiator is sealed. If the time is long, when certain dust or sundries are accumulated in the inner spaces of the radiator and the wind protection ring, the elastic lug boss is extruded to the limit, and then the dust or the sundries can be easily cleaned.
In the motor and controller cooling system, butterfly handle ball valves are respectively added at the water inlet and the water outlet of the integrated controller. Therefore, when the controller is damaged and needs to be replaced, the controller can be detached and replaced only by closing the butterfly handle ball valve without draining the antifreeze of the cooling system. Thereby improving the replacement efficiency and reducing the loss of the antifreeze.
Drawings
FIG. 1 is a schematic diagram of a motor and controller cooling system according to one embodiment of the present invention, showing the piping connections;
FIG. 2 is a front view of a cooling pack assembly according to one embodiment of the present invention;
FIG. 3 is a top view of a cooling pack assembly according to an embodiment of the present invention;
FIG. 4 is a left side view of a cooling pack assembly according to an embodiment of the present invention;
FIG. 5 is an enlarged fragmentary view of area A of FIG. 3, showing a top view of the attachment structure of the seal assembly;
FIG. 6 is an enlarged fragmentary view of area B of FIG. 4, showing a side view of the attachment structure of the seal assembly;
fig. 7 is a schematic diagram of a ferrule configuration according to an embodiment of the present invention
FIG. 8 is a schematic view of a construction of a wind shroud according to an embodiment of the present invention;
fig. 9 is a schematic diagram of the electrical control principle of the motor and controller cooling system according to an embodiment of the present invention.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
The meaning of the reference symbols in the drawings is as follows: 1. the cooling package assembly, 2, circulation circuit, 3, water pump, 4, first branch road, 5, second branch road, 6, expansion tank, 11, radiator, 12, protect the wind circle, 13, electronic fan, 14, seal assembly, 15, cutting ferrule, 16, elasticity boss, 17, draw-in groove, 18, tooth, 19, connection piece, 20, the limit of bending, 31, driving motor, 32, integrated control ware, 33, generator, 34, butterfly handle ball valve, 35, tee bend.
Detailed Description
The invention will be further explained with reference to the drawings.
FIG. 1 schematically illustrates a motor and controller cooling system according to one embodiment of the present invention. The motor and controller cooling system according to the present invention uses a single cooling system. Meanwhile, the flow and heat dissipation requirements of the integrated controller and the generator can be met, and the flow and heat dissipation requirements of the driving motor can be met.
As shown in fig. 1, the cooling system for motor and controller according to the present embodiment includes a cooling pack assembly 1. The cooling pack assembly 1 can be cooled. The system of this embodiment further includes a circulation loop 2, and both ends of the circulation loop 2 are respectively connected to the high-order interface and the low-order interface of the cooling pack assembly 1. The circulation circuit 2 comprises a water pump 3 arranged in series, and a first branch 4 and a second branch 5 arranged in parallel with each other. Wherein, the integrated controller 32 and the generator 33 are arranged on the first branch 4, and because the water inlet temperature required by the integrated controller is lower than the water inlet temperature of the generator, the integrated controller must be positioned before the generator, namely upstream of the flowing of the cooling water. The second branch 5 is provided with a driving motor 31. In addition, the device of the embodiment further comprises an expansion water tank 6, and the expansion water tank 6 is connected with the cooling package assembly 1 and the circulation loop 2.
In the motor and controller cooling system according to the present embodiment, the integrated controller 32 and the generator 33 are connected in series to form the first branch circuit 4. And then connected in parallel with the second branch 5 provided with the drive motor 31, thereby combining the motor cooling system and the controller cooling system into one cooling system. On the other hand, the sum of the heat generation amounts of the integrated controller 32 and the generator corresponds to the heat generation amount of the drive motor 31. On the other hand, the minimum sectional area of the branch composed of the integrated controller 32 and the power generation is equivalent to the minimum sectional area of the driving motor 31. In addition, the present embodiment adopts a parallel connection mode, so that the flow entering the radiator 11 assembly of the whole system can be maximized, thereby improving the heat dissipation effect of the radiator. Therefore, the integrated controller 32 and the generator are connected in series to form a branch and then connected in parallel with the driving motor 31, and the internal resistance of the pipeline arrangement system is small, so that the total flow of the cooling system is improved, and the flow of the system can meet the flow and heat dissipation requirements of the integrated controller 32 and the generator and the flow and heat dissipation requirements of the driving motor 31. Therefore, the cooling pack assembly 1 with a large heat dissipation area is used for heat dissipation, the pipeline trend is simplified, the requirement on arrangement space is smaller, the production cost is saved, and the integrated controller 32, the generator 33 and the driving motor 31 can be in a good heat dissipation state. .
In one embodiment, as shown in fig. 2, 3 and 4, the cooling pack assembly 1 comprises a heat sink 11. And the air protecting ring 12 is installed on the heat radiator 11. And an electronic fan 13 arranged in the wind-guard ring 12. Wherein, the radiator 11 is connected with the wind-protection ring 12 through a sealing part.
When the system according to the present embodiment is used, the gap between the air protecting ring 12 and the core of the heat sink 11 has an important influence on the cooling effect of the heat sink 11 and the service life of the electronic fan 13. If the clearance between the air protecting ring 12 and the core body of the radiator 11 is too large, on one hand, hot air backflow or air leakage is caused, and the cooling effect of the radiator 11 is reduced; on the other hand, when the installation position of the heat sink 11 is low, sand and dust or impurities on the ground are easily sucked into the electronic fan cover 13, adsorbed onto the blades of the electronic fan 13 or enter the motor of the electronic fan 13, so that the early abrasion of the bearing of the electronic fan 13 is caused, the unbalanced movement of the blades of the electronic fan 13 is caused, the impact on the heat sink 11 is too large, and the heat sink 11 is easily cracked and leaks water. If the clearance between the air protecting ring 12 and the core of the heat sink 11 is too small, the electronic fan cover 13 will often crush the core of the heat sink 11 due to the problem of manufacturing error, resulting in water leakage of the heat sink 11.
In one embodiment, as shown in fig. 5, 6, the sealing component comprises a ferrule 15. The ferrule 15 is wrapped around the edge of the seal assembly 14. In this embodiment, the cutting ferrule 15 is in a long shape, and a clamping groove 17 (shown in fig. 7) is provided in the cutting ferrule 15. Wherein the cross section of the clamping groove 17 is U-shaped. An elastic boss 16 provided on the ferrule 15. Wherein, the heat sink 11 presses the elastic bosses 16 and makes the elastic bosses 16 in a compressed state.
When the system according to the present embodiment is used, the sealing assembly 14 is pressed and deformed by the elastic bosses 16 and the upper and lower boundaries and the left and right boundaries of the heat sink 11, so as to seal the gap between the wind-guard ring 12 and the heat sink 11. If certain dust or sundries are accumulated in the inner spaces of the radiator 11 and the wind-protecting ring 12 after a long time, the elastic lug boss 16 is extruded to the limit, and then the dust or the sundries can be easily cleaned.
In a preferred embodiment, a plurality of inverted teeth 18 for clamping the edge of the wind protection ring 12 are arranged in the clamping sleeve 15. The inverted teeth 18 can firmly clamp the edge of the wind protection ring 12 and prevent the edge from falling off, so that the clamping sleeve 15 and the wind protection ring 12 are connected more firmly.
In one embodiment, as shown in fig. 8, a plurality of connecting pieces 19 are respectively arranged on the upper edge and the lower edge of the wind-guard ring 12, and the connecting pieces 19 are provided with U-shaped holes. Bending edges 20 are arranged on two sides of the wind protection ring 12, and the length of each bending edge 20 is matched with the length of the corresponding clamping sleeve 15. In a preferred embodiment, the gap between the upper and lower boundaries of the core body of the heat sink 11 and the wind-guard ring 12 is a (a is about 10mm), the gap between the left and right boundaries of the core body of the heat sink 11 and the wind-guard ring 12 is b (b is about 10mm), the diameter of the elastic boss 16 is c (c is about 20-25mm), and in this embodiment, 1/3c is not less than a is not less than 1/2c, and 1/3c is not less than b is not less than 1/2 c. Therefore, the gap sealing effect between the air protecting ring 12 and the radiator 11 can be ensured to be better, and the damage caused by overlarge pressure extruded by the elastic lug boss 16 can be avoided.
In one embodiment, the second branch 5 is provided with two butterfly-handle ball valves 34, and the butterfly-handle ball valves 34 are respectively arranged at the water inlet and the water outlet of the integrated controller 32. The controller is a vulnerable part, so that the loss of the antifreeze is easily caused in the after-sale maintenance process, and the price of the coolant is high, so that the after-sale maintenance cost is increased. Therefore, the butterfly-handle ball valves 34 are respectively added at the water inlet and the water outlet of the integrated controller 32, when the integrated controller 32 is damaged and needs to be replaced, the controller can be detached and replaced only by closing the butterfly-handle ball valves 34 without draining the antifreeze of the cooling system, the replacement efficiency is improved, the antifreeze loss is reduced, and the after-sale service cost is saved.
In one embodiment, a first exhaust valve connected with the expansion tank 6 is arranged at the top of the radiator 11, and a second exhaust valve connected with the expansion tank 6 is arranged at the water outlet of the driving motor 31 of the second branch 5. The gas retained in the coolant circulation circuit 2 is discharged into the expansion tank 6 through the first and second exhaust valves.
In one embodiment, as shown in FIG. 9, the integrated controller integrates a generator controller, a drive motor controller, and a vehicle control unit. The generator controller is used for controlling the operation of the generator, the driving motor controller is used for controlling the operation of the driving motor, and the vehicle control unit is used for controlling the operation of the water pump and the cooling package assembly. In the embodiment, the generator controller is connected with a generator temperature sensor and a generator controller temperature sensor which are respectively used for sensing the temperature of the stator coil of the generator and the temperature of the IGBT of the generator controller, and the generator controller converts the sensed temperature of the stator coil of the generator and the temperature of the IGBT of the generator controller into CAN signals; the driving motor controller is connected with a driving motor temperature sensor and a driving motor controller temperature sensor and is respectively used for sensing the temperature of the stator coil of the driving motor and the temperature of the IGBT of the driving motor controller, and the driving motor controller converts the sensed temperature of the stator coil of the driving motor and the sensed temperature hard wire signal of the IGBT of the driving motor controller into a CAN signal.
When the system according to the embodiment is used, the temperature collected by the generator temperature sensor and the generator controller temperature sensor is sent to the vehicle control unit through the generator controller in the form of a CAN signal. The temperatures collected by the drive motor temperature sensor and the drive motor controller temperature sensor are sent to the vehicle control unit in the form of CAN signals through the drive motor controller. And the vehicle control unit outputs a control instruction according to the received CAN signal to control the start and stop of the water pump and the start and stop of the electronic fan.
In a preferred embodiment, the generator temperature sensor is disposed near the water outlet of the generator, the generator controller temperature sensor is disposed near the water outlet of the generator controller, the driving motor 31 temperature sensor is disposed near the water outlet of the driving motor 31, and the driving motor 31 controller temperature sensor is disposed near the water outlet of the driving motor 31 controller.
The traditional way of acquiring the temperature is to contact a temperature sensor with water of a cooling system, and the temperature of the water is acquired instead of the temperature of the stator coil of the generator 33, the temperature of the stator coil of the driving motor 31 and the temperature of the IGBT of the controller. However, the temperature of the water has a temperature difference with the temperature of the generator, the driving motor 31 and the controller, and the water temperature has a delay, so that there is a high possibility that the water temperature does not exceed the upper temperature limit, and the temperature of the generator 33, the driving motor 31, the controller 32 and other components exceeds the upper temperature limit, which inevitably causes the vehicle work limitation and affects the normal running of the vehicle. The system can accurately acquire the temperature of the component by adopting the method of the system.
According to another aspect of the present invention, there is provided a motor and controller cooling method, including,
the method comprises the following steps: the motor and controller cooling system according to the above is installed on a vehicle.
Step two: and setting a plurality of water pump starting preset temperatures which respectively correspond to the driving motor temperature, the driving motor controller temperature, the generator temperature and the generator controller temperature, and starting the water pumps when any actual temperature is higher than the corresponding water pump starting preset temperature.
And setting a plurality of water pump closing preset temperatures respectively corresponding to the driving motor temperature, the driving motor controller temperature, the generator temperature and the generator controller temperature, and closing the water pumps when all the actual temperatures are lower than the corresponding water pump opening preset temperatures.
And setting a plurality of electronic fan starting preset temperatures which respectively correspond to the driving motor temperature, the driving motor controller temperature, the generator temperature and the generator controller temperature, and starting the electronic fans when any actual temperature is higher than the corresponding electronic fan starting preset temperature.
And setting the closing preset temperatures of the plurality of electronic fans, wherein the closing preset temperatures correspond to the temperature of the driving motor, the temperature of the driving motor controller, the temperature of the generator and the temperature of the generator controller respectively, and when all the actual temperatures are lower than the opening preset temperatures of the corresponding electronic fans, the electronic fans are opened.
In a preferred embodiment, the water pump start-stop control mode is as follows:
the water pump opening preset temperature corresponding to the temperature of the drive motor controller is set to be 45 degrees, the water pump opening preset temperature corresponding to the temperature of the drive motor is set to be 60 degrees, the water pump opening preset temperature corresponding to the temperature of the generator controller is set to be 45 degrees, and the water pump opening preset temperature corresponding to the temperature of the generator is set to be 60 degrees. And when the actual temperature of any one of the drive motor controller, the drive motor, the generator and the generator controller is higher than the corresponding water pump starting preset temperature, starting the water pump.
The water pump shutdown preset temperature corresponding to the temperature of the drive motor controller is set to be 40 degrees, the water pump shutdown preset temperature corresponding to the temperature of the drive motor is set to be 55 degrees, the water pump shutdown preset temperature corresponding to the temperature of the generator controller is set to be 40 degrees, and the water pump shutdown preset temperature corresponding to the temperature of the generator is set to be 55 degrees. And when all the actual temperatures of the driving motor, the driving motor controller, the generator and the generator controller are lower than the corresponding preset water pump closing temperature, closing the water pump.
In a preferred embodiment, the start and stop control mode of the electronic fan is as follows:
the electronic fan starting preset temperature corresponding to the temperature of the driving motor controller is set to be 58 degrees, the electronic fan starting preset temperature corresponding to the temperature of the driving motor is set to be 95 degrees, the electronic fan starting preset temperature corresponding to the temperature of the generator controller is set to be 58 degrees, and the electronic fan starting preset temperature corresponding to the temperature of the generator is set to be 95 degrees. And when the actual temperature of any one of the drive motor controller, the drive motor, the generator and the generator controller is higher than the corresponding electronic fan starting preset temperature, starting the electronic fan.
The electronic fan shutdown preset temperature corresponding to the temperature of the drive motor controller is set to be 48 degrees, the electronic fan shutdown preset temperature corresponding to the temperature of the drive motor is set to be 82 degrees, the electronic fan shutdown preset temperature corresponding to the temperature of the generator controller is set to be 48 degrees, and the electronic fan shutdown preset temperature corresponding to the temperature of the generator is set to be 82 degrees. And when the actual temperature of all the drive motor controller, the drive motor, the generator and the generator controller is lower than the corresponding electronic fan closing preset temperature, closing the electronic fan.
In the embodiment, when the temperature of the controller rises by 1 degree in the period of 50-58 degrees, the duty ratio is improved by 7.5%, and the whole vehicle controller realizes PWM stepless speed regulation of the electronic fan in the form of the duty ratio; when the temperature of the driving motor and the generator rises by 1 degree in the period of 85-95 degrees, the duty ratio is improved by 6 percent, and the whole vehicle controller realizes PWM stepless speed regulation of the electronic fan in the form of the duty ratio; the temperature of the controller is 48-50 degrees, and the lowest rotation speed of the electronic fan (the duty ratio is given to be 40%) runs during the period that the temperature of the driving motor is 82-85 degrees. The four temperature values control the rotation speed of the electronic fan in a mode of duty ratio setting, and the highest duty ratio is taken as the standard.
In order to better protect the driving motor, the driving motor controller, the generator and the generator controller under the condition that the cooling system of the motor and the controller has reduced heat dissipation effect due to the fault conditions of the water pump or the electronic fan being damaged or the cooling system being leaked and lacking the cooling liquid, in a preferred embodiment, the driving motor controller, the generator and the generator controller are controlled in the following modes:
setting the starting power limiting preset temperature corresponding to the temperature of the IGBT of the driving motor controller and the IGBT of the generator controller to be 70 ℃, increasing the power limiting strength of the controller along with the temperature rise of the IGBT of the controller, and completely limiting the preset temperature to be 75 ℃; the power limiting starting preset temperature corresponding to the temperatures of the stator coils of the driving motor and the generator is 130 degrees, the power limiting strength of the driving motor controller to the driving motor and the power limiting strength of the generator controller to the generator are increased along with the temperature rise of the IGBT of the controller, and the completely-limited preset temperature is 135 degrees.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (7)
1. An electric machine and controller cooling system comprising:
a cooling pack assembly (1); the cooling pack assembly (1) comprises a radiator (11), an air protecting ring (12) arranged on the radiator (11), and an electronic fan (13) arranged in the air protecting ring (12); wherein the radiator (11) is connected with the wind-protecting ring (12) through a sealing component (14); the sealing assembly comprises a clamping sleeve (15) covering the edge of the wind protection ring (12) and an elastic boss (16) arranged on the clamping sleeve (15), and the elastic boss (16) is of a hollow elastic structure; wherein the heat sink (11) compresses the resilient projections (16) and places the resilient projections (16) in compression; the clamping sleeve (15) is provided with a clamping groove (17) with a U-shaped section, and a plurality of inverted teeth (18) used for clamping the edge of the wind protection ring (12) are arranged in the clamping groove (17);
the two ends of the circulating loop (2) are respectively connected with a high-level interface and a low-level interface of the cooling package assembly (1), and the circulating loop (2) comprises a water pump (3) which is arranged in series, and a first branch (4) and a second branch (5) which are connected in parallel; and
an expansion tank (6) connecting the cooling pack assembly (1) and the circulation loop (2);
the first branch (4) comprises an integrated controller (32) and a generator (33) which are arranged in series, and the integrated controller (32) is positioned in front of the generator (33); the second branch (5) comprises a drive motor (31).
2. The motor and controller cooling system according to claim 1, wherein a plurality of connecting pieces (19) are respectively arranged on the upper edge and the lower edge of the wind protection ring (12), and each connecting piece (19) is provided with a U-shaped hole; bending edges (20) are arranged on two sides of the wind protection ring (12), and the width of each bending edge (20) is the same as the depth of the clamping groove (17).
3. The motor and controller cooling system according to claim 2, characterized in that the second branch (5) is provided with two butterfly-handle ball valves (34), the butterfly-handle ball valves (34) being provided at the water inlet and the water outlet of the integrated controller (32), respectively.
4. An electric machine and controller cooling system according to claim 3, characterized in that the radiator (11) is provided at the top with a first exhaust valve connected to the expansion tank (6), and the outlet of the drive motor (31) of the second branch (5) is provided with a second exhaust valve connected to the expansion tank (6).
5. The motor and controller cooling system according to claim 4, wherein the integrated controller (32) integrates a generator controller for controlling the operation of the generator, a drive motor controller for controlling the operation of the drive motor (31) motor, and a vehicle controller for controlling the water pump (3) and cooling pack assembly (1).
6. The motor and controller cooling system of claim 5, wherein a generator temperature sensor is provided near a water outlet of the generator for sensing a temperature of a generator stator coil; a driving motor temperature sensor is arranged near the water outlet of the driving motor and used for sensing the temperature of a stator coil of the driving motor; a generator controller temperature sensor is arranged near the water outlet of the generator controller and used for sensing the temperature of the IGBT; a driving motor controller temperature sensor is arranged near the water outlet of the driving motor controller and used for sensing the temperature of the IGBT;
the driving motor temperature sensor and the driving motor controller temperature sensor are respectively connected with the driving motor controller; the generator temperature sensor and the generator controller temperature sensor are respectively connected with the generator controller.
7. A motor and a controller cooling control method, characterized by comprising,
the method comprises the following steps: installing the electric machine and controller cooling system of any one of claims 1 to 6 on a vehicle;
step two: setting a plurality of water pump starting preset temperatures which respectively correspond to the driving motor temperature, the driving motor controller temperature, the generator temperature and the generator controller temperature, and starting the water pumps when any actual temperature is higher than the corresponding water pump starting preset temperature;
setting a plurality of water pump closing preset temperatures which respectively correspond to the driving motor temperature, the driving motor controller temperature, the generator temperature and the generator controller temperature, and closing the water pumps when all the actual temperatures are lower than the corresponding water pump closing preset temperatures;
setting a plurality of electronic fan starting preset temperatures which respectively correspond to the driving motor temperature, the driving motor controller temperature, the generator temperature and the generator controller temperature, and starting the electronic fans when any actual temperature is higher than the corresponding electronic fan starting preset temperature;
and setting a plurality of electronic fan closing preset temperatures respectively corresponding to the driving motor temperature, the driving motor controller temperature, the generator temperature and the generator controller temperature, and closing the electronic fans when all the actual temperatures are lower than the corresponding electronic fan closing preset temperatures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711128233.XA CN109774458B (en) | 2017-11-15 | 2017-11-15 | Motor and controller cooling system and method |
Applications Claiming Priority (1)
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| CN110949647B (en) * | 2019-10-30 | 2020-12-08 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Cooling water path structure of marine electric propulsion device |
| CN112373294A (en) * | 2020-11-03 | 2021-02-19 | 苏州同捷汽车工程技术股份有限公司 | Cooling system for driving motor of electric automobile |
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