Permanent magnet brushless direct current high efficiency motor

Abstract

This invention provides a high-efficiency permanent magnet brushless DC motor, belonging to the field of permanent magnet brushless DC motors. It includes a permanent magnet brushless DC motor body, with a cooling mechanism inside the motor body to improve its performance. A fixing component is provided on one side of the motor body for easy fixation. Through the cooling mechanism, this invention pumps external coolant into the inlet pipe, which then flows through a spiral pipe to ensure sufficient contact between the coolant and the interior of the permanent magnet brushless DC motor body. This removes heat from the motor body, and the heat is also dissipated to the outside through vents, increasing the cooling rate and preventing long-term operation from affecting the normal use of the permanent magnet brushless DC motor.

Description

Technical Field

[0001] This utility model relates to the field of permanent magnet brushless DC motors, and more specifically, to a permanent magnet brushless DC high-efficiency motor. Background Technology

[0002] A permanent magnet brushless DC motor (BLDC) is a type of electric motor that uses permanent magnets as rotors and controls the current and rotor position through electronic speed regulation. A BLDC consists of a motor body and a driver and is an electromechanical integrated product. Its stator windings are usually three-phase symmetrical star connection, and permanent magnets are attached to the rotor. The rotor polarity is detected by a position sensor.

[0003] A search revealed that Chinese patent CN209982254U discloses "a permanent magnet brushless high-efficiency DC motor, comprising a balance block, a rotor core, a housing, and magnets. The rotor core is installed inside the housing, and the magnets are disposed inside the housing. The balance block includes a first balance block and a second balance block. The first balance block is installed inside the housing, and the second balance block is installed on the outer wall of the housing. The permanent magnet brushless high-efficiency DC motor made using the above technical solution utilizes new permanent magnet technology, which makes the motor's adjustment range wider, the maximum overload torque greater, and significantly improves the motor efficiency. This utility model uses refreshless technology, so the motor does not generate electric sparks during operation, which greatly reduces the interference of electric sparks to remote control wireless equipment, reduces noise, and makes operation smoother." However, the following defects still exist:

[0004] The current device cannot handle the heat generated during operation. When operating for extended periods, it accumulates significant internal heat, which, if not dissipated promptly, will negatively impact its performance. Therefore, a permanent magnet brushless DC high-efficiency motor is proposed. Utility Model Content

[0005] The purpose of this invention is to address the problem that a current permanent magnet brushless DC high-efficiency motor cannot effectively handle the heat generated during operation. When the device operates for a long time, a large amount of heat is generated inside, and if the heat cannot be dissipated in time, it will affect the performance of the device.

[0006] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0007] The present invention is as follows: a permanent magnet brushless DC high-efficiency motor, including a permanent magnet brushless DC motor body, wherein a cooling mechanism for improving the performance of the permanent magnet brushless DC motor body is provided inside the permanent magnet brushless DC motor body, and a fixing component for facilitating the fixing of the permanent magnet brushless DC motor body is provided on one side of the permanent magnet brushless DC motor body.

[0008] The cooling mechanism includes a spiral pipe located inside the permanent magnet brushless DC motor body away from the output end of the permanent magnet brushless DC motor body. The two ends of the spiral pipe are respectively connected to an inlet pipe and a drain pipe. A vent hole is opened on the outer wall of the permanent magnet brushless DC motor body away from the spiral pipe. An isolation mesh is installed inside the vent hole. The spiral pipe is made of copper.

[0009] As a preferred technical solution of this utility model, the fixing component includes a mounting plate fixedly connected to the side wall of the permanent magnet brushless DC motor body away from the vent hole, the side wall of the mounting plate is provided with mounting holes, and the shape of the mounting plate is cross-shaped.

[0010] As a preferred technical solution of this utility model, a plurality of heat dissipation fins are provided on the outer wall of the permanent magnet brushless DC motor body, and the plurality of heat dissipation fins are distributed circumferentially along the central axis of the permanent magnet brushless DC motor body.

[0011] As a preferred technical solution of this utility model, two round rods are fixedly connected to the outer wall of the permanent magnet brushless DC motor body, and a lifting ring is fixedly connected to the top of each of the two round rods.

[0012] As a preferred technical solution of this utility model, the rotor surface magnet inside the permanent magnet brushless DC motor body is made of high coercivity neodymium iron boron, and the inner layer is made of high remanence samarium cobalt.

[0013] As a preferred technical solution of this utility model, the permanent magnet brushless DC motor body and several heat dissipation fins are all made of aluminum alloy.

[0014] As a preferred technical solution of this utility model, the material of the isolation net is stainless steel.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. Through the cooling mechanism, external coolant is pumped into the inlet pipe during use, and then passes through the spiral pipe to ensure that the coolant fully contacts the inside of the permanent magnet brushless DC motor body, thereby removing the heat inside the permanent magnet brushless DC motor body. At the same time, the heat inside the permanent magnet brushless DC motor body can also be discharged to the outside through the vent, which improves the cooling speed of the permanent magnet brushless DC motor body and prevents the permanent magnet brushless DC motor body from being affected by long-term operation. After passing through the spiral pipe, the coolant is discharged to the outside through the drain pipe.

[0017] 2. By using the set fixing components, the external bolts are screwed into the mounting holes and the base to be installed in sequence to fix the permanent magnet brushless DC motor body. This can prevent the permanent magnet brushless DC motor body from rotating when it is in operation. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of the permanent magnet brushless DC high-efficiency motor provided by this utility model;

[0019] Figure 2 Front view of the permanent magnet brushless DC high-efficiency motor provided by this utility model;

[0020] Figure 3 The permanent magnet brushless DC high-efficiency motor provided by this utility model Figure 2 A three-dimensional cross-sectional view at point AA;

[0021] Figure 4 A schematic diagram of the structure of the permanent magnet brushless DC high-efficiency motor fixing assembly provided by this utility model;

[0022] Figure 5 The permanent magnet brushless DC high-efficiency motor provided by this utility model Figure 3 Enlarged view of point A in the middle.

[0023] The diagram shows: 1. Permanent magnet brushless DC motor body; 2. Cooling mechanism; 3. Fixing component; 4. Heat dissipation fins; 5. Round rod; 6. Lifting ring; 201. Spiral pipe; 202. Liquid inlet pipe; 203. Liquid outlet pipe; 204. Vent hole; 205. Isolation net; 301. Mounting plate; 302. Mounting hole. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0025] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0026] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] like Figure 1As shown, this embodiment proposes a permanent magnet brushless DC high-efficiency motor, including a permanent magnet brushless DC motor body 1. The permanent magnet brushless DC motor body 1 is provided with a cooling mechanism 2 to improve the performance of the permanent magnet brushless DC motor body 1. A fixing component 3 is provided on one side of the permanent magnet brushless DC motor body 1 to facilitate fixing the permanent magnet brushless DC motor body 1.

[0029] like Figure 3 and Figure 5 As shown, the cooling mechanism 2 includes a spiral pipe 201 disposed inside the permanent magnet brushless DC motor body 1 away from the output end of the permanent magnet brushless DC motor body 1. An inlet pipe 202 and a drain pipe 203 are respectively connected to both ends of the spiral pipe 201. The inlet pipe 202 is used to inject coolant into the spiral pipe 201, and the drain pipe 203 is used to discharge coolant. A vent hole 204 is provided on the outer wall of the permanent magnet brushless DC motor body 1 away from the spiral pipe 201 to facilitate heat dissipation. An isolation mesh 205 is disposed inside the vent hole 204. The spiral pipe 201 is made of copper. 1. Improved heat dissipation: During use, after external coolant is pumped into the spiral pipe 201 through the inlet pipe 202, heat exchange occurs between the coolant and the wall of the spiral pipe 201. The thermal conductivity of the spiral pipe 201 allows heat to be quickly transferred to the coolant, which then carries away the heat. The flow of coolant in the spiral pipe 201 can more efficiently remove heat, preventing heat from accumulating in the spiral pipe 201 and causing the temperature to rise. This enables the permanent magnet brushless DC motor body 1 to operate efficiently. At the same time, the heat generated by the permanent magnet brushless DC motor body 1 can also be discharged through the vent 204, improving the heat dissipation effect of the permanent magnet brushless DC motor body 1.

[0030] like Figure 4 As shown, the fixing component 3 includes a mounting plate 301 fixedly connected to the side wall of the permanent magnet brushless DC motor body 1 away from the vent hole 204. The side wall of the mounting plate 301 is provided with mounting holes 302. The mounting plate 301 is cross-shaped. In use, external bolts are screwed into the mounting holes 302 and the base to be installed in sequence, thereby fixing the permanent magnet brushless DC motor body 1 and improving the stability of the permanent magnet brushless DC motor body 1 during operation.

[0031] like Figure 1 As shown, a number of heat dissipation fins 4 are provided on the outer wall of the permanent magnet brushless DC motor body 1. The number of heat dissipation fins 4 are distributed circumferentially along the central axis of the permanent magnet brushless DC motor body 1. When in use, the number of heat dissipation fins 4 can dissipate the heat from the periphery of the permanent magnet brushless DC motor body 1 in a timely manner, thereby further improving the heat dissipation effect.

[0032] like Figure 1As shown, two round rods 5 are fixedly connected to the outer wall of the permanent magnet brushless DC motor body 1. Each of the two round rods 5 is fixedly connected to a lifting ring 6. In use, by hanging the hook of the external lifting equipment on the lifting ring 6, the permanent magnet brushless DC motor body 1 can be easily moved, which facilitates installation.

[0033] like Figure 1 As shown, the rotor surface magnets inside the permanent magnet brushless DC motor body 1 are made of high coercivity neodymium iron boron, and the inner layer is made of high remanence samarium cobalt. By using high coercivity neodymium iron boron on the surface and high remanence samarium cobalt on the inner layer, this material combination significantly optimizes the sinusoidal nature of the back electromotive force through anti-demagnetization, stable magnetic flux division, magnetic field gradient control and harmonic suppression. After adopting the composite design, the torque pulsation of the permanent magnet brushless DC motor body 1 can be reduced by more than 40%, and the efficiency can be improved by 2-3%, while meeting the stability requirements under high temperature and high speed conditions.

[0034] like Figure 1 As shown, the permanent magnet brushless DC motor body 1 and several heat dissipation fins 4 are both made of aluminum alloy. The permanent magnet brushless DC motor body 1 and heat dissipation fins 4 made of aluminum alloy have the advantages of being lightweight, having good thermal conductivity and corrosion resistance. At the same time, the thermal conductivity reaches 160-200W / (m·K), which can quickly dissipate heat from the windings and iron core, reduce the temperature rise by 15%-20%, and significantly extend the life of the magnets and insulation materials.

[0035] like Figure 3 As shown, the isolation net 205 is made of stainless steel. The stainless steel isolation net 205 has the effects of corrosion resistance and high temperature resistance, and is convenient for long-term use.

[0036] Specifically, when using this permanent magnet brushless DC high-efficiency motor: external bolts are sequentially screwed into the mounting holes 302 and the base to be installed, thereby fixing the permanent magnet brushless DC motor body 1 and improving the stability of the permanent magnet brushless DC motor body 1 during operation (e.g., Figure 4 As shown), when the permanent magnet brushless DC motor body 1 is operating, external coolant is pumped into the spiral pipe 201 through the inlet pipe 202. Heat exchange occurs between the coolant and the wall of the spiral pipe 201. The thermal conductivity of the spiral pipe 201 allows heat to be quickly transferred to the coolant, which then carries away this heat. The flow of coolant within the spiral pipe 201 more efficiently removes heat, preventing heat accumulation and temperature rise, thus enabling the permanent magnet brushless DC motor body 1 to operate efficiently (e.g., ...). Figure 3 and Figure 5As shown), the heat generated by the permanent magnet brushless DC motor body 1 can also be discharged through the vent 204, improving the heat dissipation effect of the permanent magnet brushless DC motor body 1. At the same time, several heat dissipation fins 4 can dissipate the heat from the periphery of the permanent magnet brushless DC motor body 1 in a timely manner, further improving the heat dissipation effect (as shown). Figure 3 (As shown).

[0037] All technical features in this embodiment can be freely combined according to actual needs.

[0038] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A permanent magnet brushless DC high-efficiency motor, comprising a permanent magnet brushless DC motor body (1), characterized in that, The permanent magnet brushless DC motor body (1) is provided with a cooling mechanism (2) to improve the performance of the permanent magnet brushless DC motor body (1), and a fixing component (3) is provided on one side of the permanent magnet brushless DC motor body (1) to facilitate fixing the permanent magnet brushless DC motor body (1). The cooling mechanism (2) includes a spiral pipe (201) located inside the permanent magnet brushless DC motor body (1) away from the output end of the permanent magnet brushless DC motor body (1). The two ends of the spiral pipe (201) are respectively connected to an inlet pipe (202) and a drain pipe (203). A vent hole (204) is provided on the outer wall of the permanent magnet brushless DC motor body (1) away from the spiral pipe (201). An isolation mesh (205) is provided inside the vent hole (204). The spiral pipe (201) is made of copper.

2. The permanent magnet brushless DC high-efficiency motor according to claim 1, characterized in that, The fixing component (3) includes a mounting plate (301) fixedly connected to the side wall of the permanent magnet brushless DC motor body (1) away from the vent (204). The mounting plate (301) has a mounting hole (302) on its side wall and is cross-shaped.

3. The permanent magnet brushless DC high-efficiency motor according to claim 1, characterized in that, The outer wall of the permanent magnet brushless DC motor body (1) is provided with a number of heat dissipation fins (4), and the number of heat dissipation fins (4) are distributed circumferentially along the central axis of the permanent magnet brushless DC motor body (1).

4. The permanent magnet brushless DC high-efficiency motor according to claim 1, characterized in that, Two round rods (5) are fixedly connected to the outer wall of the permanent magnet brushless DC motor body (1), and a lifting ring (6) is fixedly connected to the top of each of the two round rods (5).

5. A permanent magnet brushless DC high-efficiency motor according to claim 1, characterized in that, The rotor surface magnet inside the permanent magnet brushless DC motor body (1) is made of high coercivity neodymium iron boron, and the inner layer is made of high remanence samarium cobalt.

6. A permanent magnet brushless DC high-efficiency motor according to claim 3, characterized in that, The permanent magnet brushless DC motor body (1) and several heat dissipation fins (4) are both made of aluminum alloy.

7. A permanent magnet brushless DC high-efficiency motor according to claim 1, characterized in that, The isolation net (205) is made of stainless steel.

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