CN209170142U - A kind of power drive motor - Google Patents

Abstract

The utility model discloses a power drive motor, which is applied to the field of electric vehicles. A heat dissipation inlet and a heat dissipation outlet are arranged on a motor casing. A heat dissipation liquid enters the motor casing through the heat dissipation inlet, and the liquid after heat absorption and temperature rise is self-dissipated. The outlet flows out; the liquid is drained to the inside of the motor to effectively dissipate heat inside the motor. By installing the liquid propelling fan blades on the rotating shaft of the magnetic steel rotor, when the driving motor is running, the magnetic steel rotor drives the liquid propelling fan blades to rotate synchronously, which can independently realize the circulating heat absorption and heat dissipation of the heat dissipation medium, improve the heat dissipation utilization rate and reduce the heat dissipation cost. .

Description

A power drive motor

technical field

The utility model belongs to the technical field of electric vehicles, in particular to a power drive motor of a pure electric vehicle.

Background technique

The electric vehicle motor is powered by the on-board power supply, and the electric vehicle uses the motor to drive the wheels. Since the impact on the environment is smaller than that of traditional vehicles, its prospects are widely optimistic.

At present, most electric vehicles in my country use lithium batteries as the main raw materials for power batteries. Including ternary lithium, lithium iron phosphate, lithium manganate and lithium cobaltate, etc. The working current of the power battery is large, and the direct cause of the motor heating is due to the large current. The motor produces a large amount of heat. At the same time, the motor is in a relatively closed environment, which will cause the overall temperature of the motor to rise rapidly. In practice, the way to deal with motor heating failure is generally to replace the motor, and frequent replacement of the motor will undoubtedly increase the cost of the car and reduce the user experience. It is very dangerous. It is very likely that driving failures will occur, and there are potential traffic safety hazards. Therefore, it is particularly important to dissipate heat from the battery.

At present, the current cooling methods of motors are usually fan cooling and liquid cooling, but no matter what cooling methods are installed outside the motor, the cooling effect is not obvious, and the cooling medium needs to be driven by a power source, and the cost is high.

Therefore, in view of the above problems, it is necessary to propose a new type of power drive motor, which can effectively realize the internal heat dissipation of the motor, and at the same time can independently realize the circulating heat absorption and heat dissipation of the heat dissipation medium, improve the utilization rate of heat dissipation, and reduce the cost of heat dissipation.

Utility model content

In view of this, the utility model proposes a power drive motor, which effectively realizes heat dissipation inside the motor by draining the liquid to the inside of the motor. Drive the liquid to propel the fan blades to rotate synchronously, which can independently realize the circulating heat absorption and heat dissipation of the heat dissipation medium, improve the utilization rate of heat dissipation, and reduce the cost of heat dissipation.

According to the purpose of the utility model, a power drive motor is proposed, which includes a motor housing, a stator winding and a magnetic steel rotor arranged inside the motor housing, and a heat dissipation inlet and a heat sink are provided on the motor housing. an outlet, the heat dissipation inlet and the heat dissipation outlet are respectively communicated with the inner cavity of the motor casing, the heat dissipation liquid enters the motor casing through the heat dissipation inlet, and the liquid after heat absorption and temperature rise flows out from the heat dissipation outlet;

A liquid propelling fan blade is installed on the rotating shaft of the magnetic steel rotor. When the driving motor is running, the magnetic steel rotor drives the liquid propelling fan blade to rotate synchronously.

Preferably, the heat dissipation inlet and the heat dissipation outlet are located at the front and rear positions of the motor housing, respectively.

Preferably, the liquid propelling fan is a centrifugal fan. When the driving motor is running, the magnetic steel rotor drives the liquid propelling fan to rotate synchronously, and the heat dissipation liquid is driven by the liquid propelling fan from the heat dissipation inlet to the heat dissipation outlet. Spiral flow.

Preferably, the magnetic steel rotor is provided with one or a plurality of through holes arranged in the axial direction, and the heat dissipation liquid enters the front end of the motor casing through the heat dissipation inlet, and flows to the motor casing through the through holes The rear end of the motor will eventually flow out of the outer side of the motor housing from the heat dissipation outlet.

Preferably, the power drive motor further includes a radiator, the radiator is disposed on the outside of the motor housing, the outlet of the radiator is communicated with the heat dissipation inlet, and the inlet is communicated with the heat dissipation outlet.

Preferably, the front and rear ends of the power drive motor are also provided with end caps, and a bearing and an oil seal are assembled at the center of the end cap, and the bearing is used to support the magnetic steel rotor.

Compared with the prior art, the advantages of the power drive motor disclosed by the present utility model are:

By opening a heat dissipation inlet and a heat dissipation outlet on the motor casing, the heat dissipation liquid enters the motor casing through the heat dissipation inlet, and the liquid after the heat absorption and temperature rise flows out from the heat dissipation outlet; the liquid is drained to the inside of the motor to effectively achieve heat dissipation inside the motor.

By installing the liquid propelling fan blades on the rotating shaft of the magnetic steel rotor, when the driving motor is running, the magnetic steel rotor drives the liquid propelling fan blades to rotate synchronously, which can independently realize the circulating heat absorption and heat dissipation of the heat dissipation medium, improve the heat dissipation utilization rate and reduce the heat dissipation cost. .

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are just some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 is a perspective view of a power drive motor disclosed in the present utility model.

The name of the corresponding part represented by the number or letter in the figure:

1. Motor housing 2. Stator winding 3. Magnetic steel rotor 4. Rotating shaft 5. Heat dissipation inlet 6. Heat dissipation outlet 7. Liquid propelling fan blade 8. End cover 9. Oil seal 10. Bearing.

Detailed ways

At present, the current cooling methods of motors are usually fan cooling and liquid cooling, but no matter what cooling methods are installed outside the motor, the cooling effect is not obvious, and the cooling medium needs to be driven by a power source, and the cost is high.

Aiming at the deficiencies in the prior art, the utility model proposes a power drive motor, which effectively realizes heat dissipation inside the motor by draining liquid to the inside of the motor. The circulation of the medium absorbs and dissipates heat, improves the utilization rate of heat dissipation, and reduces the cost of heat dissipation.

The technical solutions of the present invention will be clearly and completely described below through specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to FIG. 1. As shown in the figure, a power drive motor includes a motor housing 1, a stator winding 2 and a magnetic steel rotor 3 arranged inside the motor housing 1. The motor housing 1 is provided with a heat sink. The inlet 5 and the heat dissipation outlet 6 are respectively connected to the inner cavity of the motor housing 1. The heat dissipation liquid enters the motor housing 1 through the heat dissipation inlet 5, and the liquid after absorbing heat and temperature rises from the heat dissipation outlet. 6 outflow.

Among them, the motor housing 1 is made of high-strength alloy aluminum material, which can effectively reduce the overall weight of the driving motor, and at the same time increase the strength of the motor housing.

In order to improve the overall heat dissipation uniformity of the motor, preferably, the heat dissipation inlet 5 and the heat dissipation outlet 6 are located at the front and rear positions of the motor housing 1 respectively, so that the heat dissipation liquid can flow from the front end to the rear end of the motor to improve the heat dissipation effect. In order to further improve the heat dissipation efficiency, the heat dissipation inlet and the heat dissipation outlet can be arranged on the upper and lower sides of the two ends of the motor respectively, and the specific installation positions are not limited.

Further, the power drive motor further includes a radiator (not shown), the radiator is disposed on the outer side of the motor housing 1 , the outlet of the radiator is communicated with the heat dissipation inlet 5 , and the inlet is communicated with the heat dissipation outlet 6 . The cooling liquid with lower temperature is discharged from the outlet of the radiator, and enters the interior of the motor housing 1 through the pipeline and the cooling inlet 5. After absorbing the heat of the driving motor, the cooling liquid with a higher temperature is discharged through the cooling outlet 6 and flows in through the pipeline. The heat exchange is carried out in the radiator, and then the cycle operation is performed to realize the continuous heat dissipation of the motor casing.

Since the heat energy temperature rise generated by the drive motor during continuous operation will affect the power and efficiency of the drive motor, the cruising range of the pure electric vehicle will be seriously reduced, the energy consumption of the battery will increase, and the magnetic steel rotor will be demagnetized. In order to effectively solve the overall heat dissipation problem of the stator winding 2 and the magnetic steel rotor 3 of the driving motor, a new structure of oil-immersed self-circulation heat dissipation is preferably adopted. Specifically, a liquid propelling fan blade 7 is installed on the rotating shaft 4 of the magnetic steel rotor 3. When the driving motor is running, the magnetic steel rotor 3 drives the liquid propelling fan blade 7 to rotate synchronously. The heat-dissipating liquid flows in a spiral shape from the heat-dissipating inlet 5 to the heat-dissipating outlet 6 under the driving of the liquid propelling fan blades. Since the liquid propelling fan blades rotate synchronously with the motor during the operation of the motor, a propulsive force will be generated, so that the cooling liquid can enter the motor casing through the cooling inlet independently, and be discharged by the cooling outlet. Other power sources can save costs and improve heat dissipation.

In addition, in the absence of heat dissipation liquid, the liquid propelling fan blade rotates to drive the flow of air when the motor is running, and at the same time, it has the effect of air cooling and heat dissipation, and improves the heat dissipation efficiency.

The liquid propelling fan blade is preferably a centrifugal fan blade, and other forms of fan blades can also be used in other embodiments. The structure and material of the fan blade and its connection and fixing form with the rotating shaft, the number of liquid propelling fan blades, and the setting position are as required. The design is not specifically limited.

Among them, the cooling liquid is oil, preferably transformer oil, the magnetic steel rotor 3 is provided with one or a plurality of through holes (not shown) arranged in the axial direction, and the transformer oil with temperature rise and pressure enters After cooling, the radiator automatically re-enters the heat dissipation inlet 5 of the motor housing 1, so that the self-circulation function of the heat dissipation carrier is realized by the liquid propelling the blades 7.

The stator winding is made of non-gold alloy material. Because the non-gold alloy material has metal properties such as high density, low iron loss, temperature rise resistance, etc., it can effectively increase the actual power of the drive motor and greatly improve the overall work efficiency of the drive motor. Compared with the same traditional motor, it has more advantages It has the advantages of small size, light weight and high efficiency, and is more suitable for high-speed vehicle drive motors.

The magnetic steel rotor adopts high temperature resistant Ru boron rare earth magnetic steel as the veneer material of the magnetic steel rotor. Therefore, the magnetic field strength is effectively improved. Due to the use of high temperature resistant Ru boron rare earth material magnetic steel, it overcomes the demagnetization of the magnetic steel rotor caused by the temperature rise of the driving motor during long-term, high-torque operation. reduce power and increase energy consumption.

The front and rear ends of the power drive motor are also provided with an end cover 8 , a bearing 10 and an oil seal 9 are assembled at the center of the end cover 8 , and the bearing 10 is used to support the magnetic steel rotor 3 . The motor end cover is made of alloy aluminum to improve the structural strength.

To sum up, the utility model discloses a power drive motor. By opening a heat dissipation inlet and a heat dissipation outlet on the motor casing, the heat dissipation liquid enters the motor casing through the heat dissipation inlet, and the liquid after heat absorption and temperature rise is released from the heat dissipation outlet. Outflow; Drain the liquid to the inside of the motor, effectively realize the heat dissipation inside the motor. By installing the liquid propelling fan blades on the rotating shaft of the magnetic steel rotor, when the driving motor is running, the magnetic steel rotor drives the liquid propelling fan blades to rotate synchronously, which can independently realize the circulating heat absorption and heat dissipation of the heat dissipation medium, improve the heat dissipation utilization rate and reduce the heat dissipation cost. .

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (4)

1. A power drive motor, comprising a motor housing, a stator winding and a magnetic steel rotor arranged inside the motor housing, wherein the motor housing is provided with a heat dissipation inlet and a heat dissipation outlet, The heat dissipation inlet and the heat dissipation outlet are respectively communicated with the inner cavity of the motor casing, the heat dissipation liquid enters the motor casing through the heat dissipation inlet, and the liquid after heat absorption and temperature rise flows out from the heat dissipation outlet; A liquid propelling fan blade is installed on the rotating shaft of the magnetic steel rotor, and when the driving motor is running, the magnetic steel rotor drives the liquid propelling fan blade to rotate synchronously; The heat dissipation inlet and the heat dissipation outlet are respectively located at the front end and the rear end of the motor housing, The liquid propelling fan blade is a centrifugal fan blade, including two front and rear. When the driving motor is running, the magnetic steel rotor drives the liquid propelling fan blade to rotate synchronously, and the cooling liquid is driven by the liquid propelling fan blade from the cooling inlet. Spiral flow to the heat dissipation outlet. 2 . The power drive motor according to claim 1 , wherein the magnetic steel rotor is provided with one or a plurality of uniformly distributed through holes arranged in the axial direction, and the cooling liquid enters the motor housing through the cooling inlet. 3 . The front end of the motor casing flows through the through hole to the rear end of the motor casing, and finally flows out of the motor casing from the heat dissipation outlet. 3 . The power drive motor according to claim 1 , wherein the power drive motor further comprises a radiator, the radiator is arranged on the outer side of the motor housing, the outlet of the radiator is communicated with the heat dissipation inlet, and the inlet Connected to the cooling outlet. 4. The power drive motor according to any one of claims 1-3, characterized in that, the front and rear ends of the power drive motor are further provided with end caps, and a bearing and an oil seal are assembled at the central position of the end cap, and the bearing is provided with a bearing and an oil seal. to support the magnetic steel rotor.