Air cooling device for switched reluctance motor

Abstract

The utility model relates to the technical field of motors, and discloses an air cooling device for a switched reluctance motor, which comprises a switched reluctance motor body, a rear shell is fixedly arranged behind the switched reluctance motor body, and a plurality of groups of air inlets are uniformly arranged on the side wall surface of the rear shell. A spacer ring is integrally formed and fixedly installed in the middle of the rear portion of the switched reluctance motor body, the spacer ring is a shell with the hollow rear portion, a heat conductor is fixedly installed at the rear end of the spacer ring, a heat dissipation assembly is installed on the outer wall face of the spacer ring in an interference fit mode, and the heat dissipation assembly is formed by surrounding a plurality of sets of rectangular heat dissipation plates with the spacer ring as the center. And two parts of relatively dense inner heat dissipation fins and relatively sparse outer heat dissipation fins are formed. According to the utility model, the interior of the rear shell is divided into an inlet air channel and an outlet air channel which are matched with the outer heat dissipation fins and the middle ring by using the spacer ring and the air outlet channel, so that the air-cooling heat dissipation capability is improved, and the service life in an environment with more dust can be prolonged due to the design of internal and external isolation.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to an air cooling device for a switched reluctance motor. Background Art

[0002] The switched reluctance motor (SRM) is a simple, reliable, and cost-effective motor technology. Its unique structure and control strategy have led to its widespread adoption in electric vehicle drives, industrial applications, and household appliances. However, despite its advantages in many applications, SRMs still face challenges in heat dissipation, particularly when operating under high loads or in high ambient temperatures. Heat dissipation in motors directly impacts their performance and lifespan, making effective heat dissipation a crucial consideration in motor design.

[0003] Air cooling, as a passive heat dissipation method, plays a vital role in dissipating heat from electronic and mechanical equipment. Heat sink fins, a key component in air cooling systems, increase surface area to improve heat exchange efficiency. Traditional air cooling systems use fans to drive air through the fins to dissipate heat. However, traditional air cooling designs can be inefficient under high heat loads, and some applications may require more efficient cooling solutions. Furthermore, considering the limited space available for air cooling within the motor, utilizing heat sink fins to improve heat dissipation efficiency within this limited space is a valuable challenge.

[0004] To this end, we propose an air cooling device for a switched reluctance motor. Utility Model Content

[0005] The utility model mainly solves the technical problems existing in the above-mentioned prior art and provides an air cooling device for a switched reluctance motor.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: an air cooling device for a switched reluctance motor, comprising a switched reluctance motor body, a rear shell fixedly mounted on the rear of the switched reluctance motor body, a plurality of air inlets evenly arranged on the side wall of the rear shell, a spacer ring integrally formed and fixedly mounted on the rear middle of the switched reluctance motor body, the spacer ring being a hollow shell at the rear, a heat conductor fixedly mounted on the rear end of the spacer ring, a heat dissipation component installed in an interference fit on the outer wall of the spacer ring, and the heat dissipation component consisting of a plurality of rectangular heat dissipation components. The plate is surrounded by a spacer ring, forming two parts: a relatively dense inner heat dissipation fin and a relatively sparse outer heat dissipation fin. A middle ring is integrally formed between the inner heat dissipation fin and the outer heat dissipation fin, dividing the heat dissipation component into two parts: an inner heat dissipation fin and an outer heat dissipation fin that are not ventilated to each other. An air outlet is fixedly installed behind the middle ring, a fan is fixedly installed on the rear end face of the heat conductor, and a rear plate is detachably installed on the rear end face of the rear shell. The middle part of the rear plate is open, and the rear end of the air outlet extends to the rear plate but is in contact with the rear plate.

[0007] Preferably, a shield is provided on the inner wall of the rear shell at the position corresponding to the air inlet, and the shield completely covers the air inlet. The side edges of each group of the shields are fixedly connected to the rear shell by mounting pins, and each group of the air inlets is tilted clockwise.

[0008] Preferably, a first adhesive sheet is fixedly mounted on a side of the cover away from the mounting pins, and a second adhesive sheet is fixedly mounted on a position of the back cover corresponding to the first adhesive sheet, and the first adhesive sheet and the second adhesive sheet are bonded to each other.

[0009] Preferably, the masking sheet and the back cover located below the back cover and on the right side wall of the back cover are not provided with the first adhesive sheet and the second adhesive sheet.

[0010] Preferably, a dustproof net is fixedly installed in the middle of the rear plate.

[0011] Preferably, the first adhesive sheet is an adhesive sheet, and the second adhesive sheet is a polyimide sheet.

[0012] Preferably, the heat conductor is an aluminum plate.

[0013] Beneficial effects

[0014] The utility model provides an air cooling device for a switched reluctance motor. It has the following beneficial effects:

[0015] (1) The air cooling device for a switched reluctance motor, after the fan is turned on, forms two parts of outer heat dissipation fins and a middle ring with different densities by surrounding a spacer ring with multiple sets of rectangular heat dissipation plates. The spacer ring and the air outlet duct are used to divide the interior of the rear shell into two inlet and outlet air ducts that cooperate with the outer heat dissipation fins and the middle ring, thereby improving the air cooling and heat dissipation capacity. In addition, the design of internal and external isolation can increase the service life in a dusty environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0017] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in size, without affecting the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is a three-dimensional front view of the utility model;

[0020] Figure 3 This is a three-dimensional rear view of the utility model;

[0021] Figure 4 It is a partial schematic diagram of the utility model.

[0022] Legend:

[0023] 1. Switched reluctance motor body; 2. Back cover; 3. Air inlet; 4. Spacer ring; 5. Heat conductor; 6. Inner cooling fins; 7. Middle ring; 8. Outer cooling fins; 9. Air outlet; 10. Fan; 11. Back panel; 12. Dust screen; 13. Mounting pins; 14. Covering plate; 15. Adhesive plate 1; 16. Adhesive plate 2. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] An air cooling device for a switched reluctance motor, such as Figure 1-Figure 4 As shown, it includes a switched reluctance motor body 1, a rear shell 2 is fixedly installed at the rear of the switched reluctance motor body 1, and the rear shell 2 is a shell with front and rear hollowing, which is used to install air-cooling equipment. A plurality of air inlets 3 are evenly arranged on the side wall of the rear shell 2. A spacer ring 4 is integrally formed and fixedly installed in the middle of the rear of the switched reluctance motor body 1. The spacer ring 4 is a hollow shell at the rear, which is used to place the motor control circuit board. In this embodiment, the spacer ring 4 is a cylindrical structure, and in other embodiments it can also be a rectangular structure. A heat conductor 5 is fixedly installed at the rear end of the spacer ring 4. The heat conductor 5 is a material with good thermal conductivity, and in this embodiment it is an aluminum plate. The motor control circuit board is bonded to the heat conductor 5 to conduct the heat generated inside the motor and the motor control circuit board. Through the cooperation of the spacer ring 4 and the heat conductor 5, the main equipment inside the motor is isolated from the outside, so that it has a better service life in an environment with a lot of dust.

[0026] Furthermore, a heat dissipation component is installed on the outer wall surface of the spacer ring 4 by interference fit. The heat dissipation component is formed by multiple groups of rectangular heat dissipation plates surrounding the spacer ring 4 as the center, forming a relatively dense inner heat dissipation fin 6 and a relatively sparse outer heat dissipation fin 8. A middle ring 7 is integrally formed between the inner heat dissipation fin 6 and the outer heat dissipation fin 8, dividing the inner heat dissipation fin 6 and the outer heat dissipation fin 8 into two parts that are not ventilated to each other. An air outlet 9 is fixedly installed behind the middle ring 7, and a fan 10 is fixedly installed on the rear end face of the heat conductor 5. The fan 10 is located inside the air outlet 9. The rear end face of the rear shell 2 is detachably installed with a rear plate 11. The middle part of the rear plate 11 is open, and the rear end of the air outlet 9 extends to the rear plate 11 but is fitted with the rear plate 11. At this time, an air inlet channel is formed outside the air outlet 9, and an air outlet channel is formed inside the air outlet 9.

[0027] After the fan 10 is turned on, the cold air enters the back shell 2 from the side of the back shell 2 and flows toward the front of the back shell 2. It first contacts the external heat dissipation fins 8 through the air inlet channel. Because the external heat dissipation fins 8 are relatively sparse and have a larger surface area, the heat dissipation performance is good and the heat can be dissipated better. At this time, the wind flows from the front of the back shell 2 to the middle of the back shell 2 and is discharged from the air outlet channel, passing through the relatively dense inner heat dissipation fins 6. Because the inner heat dissipation fins 6 are relatively dense, the heat can be better conducted from the heat conductor 5 to the external heat dissipation fins 8 for transfer. The thermal conductivity is better and the air can also flow out from here, and the heat is dissipated in advance. By having multiple groups of rectangular heat dissipation plates surrounding the spacer ring 4, two parts of outer heat dissipation fins 8 and middle ring 7 with different densities are formed, and the spacer ring 4 and the air outlet duct 9 are used to divide the interior of the back shell 2 into two inlet and outlet air ducts that cooperate with the external heat dissipation fins 8 and the middle ring 7, the air cooling and heat dissipation capacity is improved, and the service life in a dusty environment can be improved due to the design of internal and external isolation.

[0028] In a preferred embodiment, a cover 14 is provided on the inner wall of the rear shell 2 at a position corresponding to the air inlet 3. The cover 14 completely covers the air inlet 3. The side edges of each set of covers 14 are fixedly connected to the rear shell 2 by mounting pins 13. In this embodiment, the cover 14 is a rubber sheet. According to its own elastic force, after the fan 10 is turned off, it fits with the rear shell 2 to close the air inlet 3 and reduce the entry of dust. When the fan 10 is turned on, it rises from the side away from the mounting pins 13 to guide the wind into the rear shell 2.

[0029] In one embodiment, a first adhesive sheet 15 is fixedly mounted on the side of the cover 14 away from the mounting pin 13, and a second adhesive sheet 16 is fixedly mounted on the position of the back cover 2 corresponding to the first adhesive sheet 15. The first adhesive sheet 15 and the second adhesive sheet 16 are bonded to each other. In this embodiment, the first adhesive sheet 15 is an adhesive sheet, and the second adhesive sheet 16 is a polyimide sheet.

[0030] In another embodiment, among the mounting pins 13 and the cover sheets 14 arranged in the clockwise direction, the adhesive sheet 15 and the adhesive sheet 2 16 are not provided below the rear shell 2 and on the right side wall of the rear shell 2, because the cover sheets 14 on both sides can achieve the sealing effect only by relying on their own gravity.

[0031] Each set of air inlets 3 is arranged to be tilted clockwise. When air passes through the air inlets 3, it is tilted and guided by the air inlets 3 to form a cyclone inside the rear housing 2, thereby reducing turbulence.

[0032] In some embodiments, a dust screen 12 is fixedly installed in the middle of the rear panel 11 to prevent large particles of debris from entering.

[0033] The working principle of the present invention is as follows: after the fan 10 is turned on, the cold air enters the rear shell 2 from the side of the rear shell 2 and flows toward the front of the rear shell 2, first contacts the outer heat dissipation fins 8 through the air inlet channel. Because the outer heat dissipation fins 8 are relatively sparse and have a larger surface area, the heat dissipation performance is good and the heat can be better dissipated. At this time, the wind flows from the front of the rear shell 2 to the middle of the rear shell 2 and is discharged from the air outlet channel, passing through the relatively dense inner heat dissipation fins 6. Because the inner heat dissipation fins 6 are relatively dense, the heat can be better conducted out of the heat conductor 5 to the outer heat dissipation fins 8, with better thermal conductivity and air can also flow out from here, and heat is dissipated in advance. By having multiple groups of rectangular heat dissipation plates surrounding the spacer ring 4, two parts of outer heat dissipation fins 8 and middle ring 7 with different densities are formed, and the spacer ring 4 and the air outlet duct 9 are used to divide the interior of the rear shell 2 into two inlet and outlet air ducts coordinated with the outer heat dissipation fins 8 and the middle ring 7, the air cooling and heat dissipation capacity is improved, and the service life in an environment with more dust can be improved due to the design of internal and external isolation.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. An air cooling device for a switched reluctance motor, comprising a switched reluctance motor body (1), a rear shell (2) fixedly mounted behind the switched reluctance motor body (1), a side wall of the rear shell (2) uniformly provided with a plurality of air inlets (3), and characterized in that: A spacer ring (4) is integrally formed and fixedly mounted in the middle of the rear of the switched reluctance motor body (1); the spacer ring (4) is a hollow shell at the rear; a heat conductor (5) is fixedly mounted at the rear end of the spacer ring (4); a heat dissipation assembly is installed on the outer wall of the spacer ring (4) through interference fit; the heat dissipation assembly is formed by a plurality of groups of rectangular heat dissipation plates surrounding the spacer ring (4) as the center, forming two parts: a relatively dense inner heat dissipation fin (6) and a relatively sparse outer heat dissipation fin (8); the inner heat dissipation fin (6) and the outer heat dissipation fin (8) are (8) is provided with a middle ring (7) formed in an integral manner, dividing the heat dissipation assembly into two parts, an inner heat dissipation fin (6) and an outer heat dissipation fin (8) which are not ventilated to each other; an air outlet duct (9) is fixedly installed behind the middle ring (7); a fan (10) is fixedly installed on the rear end face of the heat conductor (5); a rear plate (11) is detachably installed on the rear end face of the rear shell (2); the middle part of the rear plate (11) is open, and the rear end of the air outlet duct (9) extends to the rear plate (11) but is in contact with the rear plate (11).

2. The air cooling device for a switched reluctance motor according to claim 1, characterized in that: A shielding piece (14) is provided on the inner wall of the rear shell (2) at a position corresponding to the air inlet (3), and the shielding piece (14) completely covers the air inlet (3). The side edges of each group of shielding pieces (14) are fixedly connected to the rear shell (2) via mounting pins (13), and each group of air inlets (3) is arranged to be inclined clockwise.

3. The air cooling device for a switched reluctance motor according to claim 2, characterized in that: A first adhesive sheet (15) is fixedly mounted on the side of the cover sheet (14) away from the mounting pin (13), and a second adhesive sheet (16) is fixedly mounted on the rear shell (2) at a position corresponding to the first adhesive sheet (15), and the first adhesive sheet (15) and the second adhesive sheet (16) are in contact with each other.

4. The air cooling device for a switched reluctance motor according to claim 3, characterized in that: The cover sheet (14) and the rear shell (2) located below the rear shell (2) and on the right side wall of the rear shell (2) are not provided with the first adhesive sheet (15) and the second adhesive sheet (16).

5. The air cooling device for a switched reluctance motor according to claim 1, characterized in that: A dustproof net (12) is fixedly installed in the middle of the rear plate (11).

6. The air cooling device for a switched reluctance motor according to claim 3, characterized in that: The first adhesive sheet (15) is an adhesive sheet, and the second adhesive sheet (16) is a polyimide sheet.

7. The air cooling device for a switched reluctance motor according to claim 1, characterized in that: The heat conductor (5) is an aluminum plate.

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