CN220273463U - Novel motor structure - Google Patents

Abstract

The utility model discloses a new motor structure, which includes a stand-alone machine, a motor controller and a bracket. The stand-alone machine includes a motor casing, a stator assembly, a rotor assembly, a rotating shaft, a first fan and an air guide cover. The rear extension end of the rotating shaft is installed with a The first fan has an air guide hood installed outside the first fan, and an air inlet is provided on the air guide hood; the motor controller includes a control circuit board, a radiator, a high-speed cooling fan and a casing, and controls the high-power output of the circuit board. The chip is attached to the top plate of the radiator. There are a number of heat dissipation fins arranged at intervals below the top plate of the radiator. The heat dissipation fins are distributed along the axial direction. A high-speed cooling fan is installed on one side of the radiator to control the large protrusion of the circuit board. The power capacitor is located on the other side of the radiator, and several air outlets are provided on the front side of the casing. When it is running at low speed, it uses a high-speed cooling fan to provide sufficient wind pressure. In harsh operating environments, the temperature rise of the whole machine will not be too high, extending the service life of the whole machine.

Description

A new type of motor structure

Technical areas:

The utility model relates to a new motor structure.

Background technique:

Modern motors all use higher electromagnetic loads to improve material utilization, and the single-machine capacity of the motor is also increasing day by day. Therefore, the cooling system of the motor must be improved to improve the heat dissipation capacity. Except for a few small motors or special motors, most motors use fans to force air flow to cool the motor.

Existing PMSM motors or BLDC motors usually include a stand-alone machine and a controller. The stand-alone machine includes a stator assembly, a rotor assembly and a motor casing. The controller mainly includes a box body and a control circuit board. Both the stand-alone machine and the controller generate large amounts of heat, and when the ambient temperature is high, natural cooling often cannot meet the design requirements, so additional heat dissipation devices are required. We usually choose the simpler air cooling. The cooling fan generates enough pressure to drive the required gas through the motor so that the temperature rise of the entire machine is within a reasonable range.

However, due to different customer needs, whether to provide a complete machine (stand-alone machine + controller) or only a single machine requires us to design the controller to be easy to disassemble, and provide two supply methods for customers to choose from.

Existing technology and its existing technical problems: Due to problems such as space and heat dissipation, existing motor designs often separate the stand-alone machine and the controller, that is, the whole machine is made into a split type. However, this takes up a large space and causes electromagnetic resistance. The interference capability is poor; or a single machine and the controller are integrated, and there is a cooling fan at the end of the shaft extension of the single machine. However, this design requires a good operating environment for the whole machine, which is limited by the use environment.

As we all know, when the ventilation area is constant, the greater the plane speed (the plane speed is determined by the rotation speed of the rotor and the wind pressure), the greater the air volume, the greater the heat absorbed by the air. When the air flow is transferred, it can take away more heat and dissipate heat. The effect is more obvious.

However, in the early stages of motor electromagnetic and structural design, the motor speed and overall dimensions have been determined, that is, the outer diameter of the cooling fan and the rotor rotation speed are basically determined. If the motor is running at low speed for a long time, there will not be enough air pressure to allow the cooling air to flow through the controller and the surface of the unit. Coupled with the harsh use environment, the temperature rise of the whole machine will be too high, resulting in a significant shortening of the life of the whole machine.

The above situation only applies to the whole machine. For solutions that only provide a single machine, the cooling fan at the end of the motor is enough to dissipate heat from the motor. When designing this motor, it is necessary to consider both the complete machine and stand-alone solutions.

Contents of the invention:

The purpose of this utility model is to provide a new type of motor structure that can solve the problem of the complete machine structure in which a single machine and a controller are assembled together in the existing technology. The motor speed and overall external dimensions have been determined in the early design stage, that is, the outer diameter of the cooling fan. , the rotor rotation speed is basically determined. When running at low speed, there is not enough wind pressure to allow the cooling air to flow through the controller and the surface of the single machine. Coupled with the harsh use environment, the temperature rise of the whole machine will be too high, resulting in a significant decrease in the life of the whole machine. Shortened technical issues.

A further purpose of the present invention is to provide a new motor structure. The controller can be quickly and easily disassembled from a single machine without affecting heat dissipation. The single machine can be sold without modification, which is flexible and convenient.

The purpose of the present utility model is achieved through the following technical solutions.

A new type of motor structure includes a stand-alone machine, a motor controller and a bracket. The stand is installed on the top of the stand-alone machine, and the motor controller is installed on the bracket. Among them:

The single machine includes a motor casing, a stator assembly, a rotor assembly, a rotating shaft, a first fan and an air guide. The stator assembly and the rotor assembly are installed inside the motor casing. The rotor assembly is installed on the rotating shaft. Both ends of the rotating shaft protrude from both ends of the motor casing. A front shaft extension end and a rear shaft extension end are formed respectively. A first fan is installed on the rear shaft extension end. An air guide hood is installed outside the first fan. An inlet is provided on one end face of the air guide hood behind the first fan. wind hole;

It is characterized in that: the motor controller includes a control circuit board, a radiator, a high-speed cooling fan and a casing. The control circuit board, radiator and high-speed cooling fan are all installed in the cavity of the casing, and control the high-power chip on the circuit board. Attached to the top plate of the radiator, there are a number of heat dissipation fins arranged at intervals below the top plate of the radiator. The heat dissipation fins are distributed along the axial direction. A high-speed cooling fan is installed on one side of the radiator to control the high-power output of the circuit board. The capacitor is located on the other side of the radiator, and several air outlets are provided on the front side of the casing.

The outer surface of the above-mentioned motor casing is provided with a number of first heat dissipation ribs arranged along the axial direction.

The above-mentioned housing includes a top case made of metal and a frame installed underneath the top case.

Several of the above-mentioned air outlets are provided on the frame.

The above-mentioned frame is a plastic part with a rectangular cross-section.

A number of second heat dissipation ribs are provided on the outer surface of the above-mentioned top case.

The cross-section of the above-mentioned bracket is "┎┐" shaped, and reinforcement ribs are provided at the corners.

A gap is set above the top of the above-mentioned air guide hood, and the gap is connected with the cavity inside the casing. Cold air enters from the air duct hood, and part of the cold air enters the cavity inside the casing and passes through the high-power capacitor, radiator, and high-speed cooling fan. It is discharged through several air outlets, and another part of cold air passes through the outer surface of the motor housing to take away the heat of the single machine.

Compared with the existing technology, this utility model has the following effects:

1) The new motor structure of the present utility model includes a single machine, a motor controller and a bracket. The top mounting bracket of the single machine is installed. The motor controller is installed on the bracket. The single machine includes a motor casing, a stator assembly, a rotor assembly, a rotating shaft, a first fan and The air guide hood has a first fan installed on the rear shaft extension end, an air guide hood is installed outside the first fan, and an air inlet is provided on one end of the air guide hood behind the first fan; the motor controller includes a control unit The circuit board, radiator, high-speed cooling fan and casing, the control circuit board, radiator, and high-speed cooling fan are all installed in the cavity of the casing. The high-power chip on the control circuit board is attached to the top plate of the radiator. There are a number of heat dissipation fins arranged at intervals below the top plate. A high-speed cooling fan is installed on one side of the radiator. The high-power capacitor protruding from the control circuit board is located on the other side of the radiator. Both are installed on the front side of the casing. Several air vents. When the outer diameter of the first fan and the gear speed of the rotor are basically determined, when running at low speed, a high-speed cooling fan is used to provide sufficient wind pressure, so that the cooling air flows through the inside of the controller and the surface of the stand-alone machine at the same time. , even in harsh operating conditions, the temperature rise of the whole machine will not be too high, extending the service life of the whole machine.

2) Other advantages of the present invention are described in detail in the embodiment section.

Picture description:

Figure 1 is a perspective view from one angle provided by the utility model;

Figure 2 is a perspective view from another angle provided by the utility model;

Figure 3 is an exploded view from one angle provided by the utility model;

Figure 4 is an exploded view from another angle provided by the utility model;

Figure 5 is a left view provided by the utility model;

Figure 6 is a cross-sectional view along line A-A of Figure 5;

Figure 7 is a perspective view of the motor controller provided by the utility model from one angle;

Figure 8 is a perspective view of the motor controller provided by the utility model from another angle;

Figure 9 is a schematic diagram of the installation of the radiator and high-speed cooling fan provided by the utility model;

Figure 10 is a schematic diagram of the installation of the control circuit board, radiator, and high-speed cooling fan provided by the present utility model.

Figure 11 is a schematic diagram of the air flow direction during operation provided by the present utility model.

Detailed ways:

The utility model will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

Example 1:

As shown in Figures 1 to 11, this embodiment provides a new type of motor structure, including a stand-alone machine 1, a motor controller 2 and a bracket 3. The top of the stand-alone machine 1 is installed with the bracket 3, and the motor controller 2 is installed on the bracket 3. ,in:

The single machine 1 includes a motor casing 11, a stator assembly 12, a rotor assembly 13, a rotating shaft 14, a first fan 15 and an air guide 16. The stator assembly 12 and the rotor assembly 13 are installed inside the motor casing 11, and the rotor assembly 13 is installed on the rotating shaft 14. , both ends of the rotating shaft 14 extend from both ends of the motor housing 11 to form a front shaft extension 141 and a rear shaft extension 142 respectively. A first fan 15 is installed on the rear shaft extension 142, and a first fan 15 is installed outside the first fan 15. The air guide 16 is provided with an air inlet 162 on one end surface 161 of the air guide 16 located behind the first fan 15;

It is characterized in that: the motor controller 2 includes a control circuit board 21, a radiator 22, a high-speed cooling fan 23 and a housing 24. The control circuit board 21, the radiator 22 and the high-speed cooling fan 23 are all installed in the cavity 240 of the housing 24. Here, the high-power chip 211 on the control circuit board 21 is attached to the top plate 221 of the radiator 22. There are a number of heat dissipation fins 222 arranged at intervals below the top plate 221 of the radiator 22. The heat dissipation fins 222 are distributed along the axial direction to dissipate heat. A high-speed cooling fan 23 is installed on one side of the radiator 22. The high-power capacitor 212 protruding from the control circuit board 21 is located on the other side of the radiator 22. A number of air outlets 241 are provided on the front side 242 of the housing 24. When the outer diameter of the first fan 15 and the gear speed of the rotor rotation are basically determined, when running at low speed, the high-speed cooling fan 23 is used to provide sufficient wind pressure, so that the cooling air flows through the inside and outside of the controller 2 at the same time. The surface of the stand-alone machine 1 prevents the temperature rise of the whole machine from being too high even under harsh operating conditions, thus extending the service life of the whole machine. In addition, the motor controller 2 and the bracket 3 can be easily removed from the stand-alone machine 1 without affecting the heat dissipation of the motor 1. The stand-alone machine can be sold without modification, which is flexible and convenient.

The outer surface of the above-mentioned motor housing 11 is provided with a number of first heat dissipation ribs 110 arranged along the axial direction, which can speed up heat dissipation.

The above-mentioned housing 24 includes a top case 24a made of metal material and a frame 24b installed below the top case 24a. The above-mentioned plurality of air outlets 241 are arranged on the frame 24b, which is reasonably arranged and convenient for manufacturing.

The above-mentioned frame 24b is a plastic part with a rectangular cross-section.

A plurality of second heat dissipation ribs 243 are provided on the outer surface of the above-mentioned top case 24a. Can speed up heat dissipation.

The cross-section of the above-mentioned bracket 3 is "┎┐" shape, and reinforcing ribs 31 are provided at the corners to increase the structural strength.

A notch 163 is provided above the top of the above-mentioned air guide 16. The notch 163 is connected with the cavity 240 inside the casing 24. Cold air enters from the air duct 16, and part of the cold air enters the cavity 240 inside the casing 24 and passes through the high-power The capacitor 212, the radiator 22, the high-speed cooling fan 23 and a plurality of air outlets 241 are discharged, and another part of cold air passes through the outer surface of the motor housing 11 to take away the heat of the single machine 1. A dual-fan layout of the first fan 15 and the high-speed cooling fan 23 is adopted. The first fan 15 is responsible for sucking air, and the high-speed cooling fan 23 is responsible for blowing air. They cooperate with each other to speed up air flow and heat dissipation. When running at low speed, high-speed heat dissipation is used. The fan 23 provides sufficient wind pressure so that the cooling air flows through the inside of the controller 2 and the surface of the stand-alone machine 1 at the same time. Even in harsh operating environments, the temperature rise of the whole machine will not be too high, extending the service life of the whole machine, Figure 11 The middle arrow indicates the direction of air flow.

The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited thereto. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present utility model shall be considered. Equivalent replacement methods are included in the protection scope of the present utility model.

Claims (8)

1. A new type of motor structure, including a single machine (1), a motor controller (2) and a bracket (3). The bracket (3) is installed on the top of the single machine (1), and the motor controller (2) is installed on the bracket (3). above, where: The single machine (1) includes a motor casing (11), a stator assembly (12), a rotor assembly (13), a rotating shaft (14), a first fan (15) and an air guide cover (16). The stator assembly (12) and the rotor assembly (13) is installed inside the motor casing (11). The rotor assembly (13) is installed on the rotating shaft (14). The two ends of the rotating shaft (14) extend from the two ends of the motor casing (11) to form the front shaft extension end (141). ) and the rear axle extension end (142). The first fan (15) is installed on the rear axle extension end (142). An air guide cover (16) is installed outside the first fan (15) and is located at the first fan (15). 15) An air inlet hole (162) is provided on one end face (161) of the rear air guide hood (16); It is characterized in that: the motor controller (2) includes a control circuit board (21), a radiator (22), a high-speed cooling fan (23) and a casing (24). The control circuit board (21), radiator (22), The high-speed cooling fans (23) are installed in the cavity (240) of the casing (24), and the high-power chip (211) on the control circuit board (21) is attached to the top plate (221) of the radiator (22) to dissipate heat. A number of heat dissipation fins (222) are arranged at intervals below the top plate (221) of the radiator (22). The heat dissipation fins (222) are distributed along the axial direction, and a high-speed cooling fan (23) is installed on one side of the radiator (22). , the high-power capacitor (212) protruding from the control circuit board (21) is located on the other side of the radiator (22), and several air outlets (241) are provided on the front side (242) of the casing (24). 2. A new type of motor structure according to claim 1, characterized in that: the outer surface of the motor housing (11) is provided with a number of first heat dissipation ribs (110) arranged along the axial direction. 3. A new motor structure according to claim 1 or 2, characterized in that: the housing (24) includes a top case (24a) made of metal and a frame (24b) installed below the top case (24a) . 4. A new type of motor structure according to claim 3, characterized in that a plurality of air outlets (241) are provided on the frame (24b). 5. A new type of motor structure according to claim 4, characterized in that: the frame (24b) is a plastic part and the cross-section is a rectangular structure. 6. A new type of motor structure according to claim 5, characterized in that a number of second heat dissipation ribs (243) are provided on the outer surface of the top case (24a). 7. A new type of motor structure according to claim 3, characterized in that the cross section of the bracket (3) is "┎┐" shaped, and reinforcing ribs (31) are provided at the corners. 8. A new type of motor structure according to claim 3, characterized in that: a notch (163) is provided above the top of the air guide cover (16), and the notch (163) is connected with the cavity (240) inside the housing (24). Connected, cold air enters from the air guide hood (16), and part of the cold air enters the cavity (240) inside the casing (24), passing through the high-power capacitor (212), radiator (22), and high-speed cooling fan (23) It is discharged through several air outlets (241), and another part of cold air passes through the outer surface of the motor casing (11) and takes away the heat of the single machine (1).