CN210111706U - High-power permanent magnet brushless direct current motor without water cooling - Google Patents

High-power permanent magnet brushless direct current motor without water cooling Download PDF

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Publication number
CN210111706U
CN210111706U CN201921266855.3U CN201921266855U CN210111706U CN 210111706 U CN210111706 U CN 210111706U CN 201921266855 U CN201921266855 U CN 201921266855U CN 210111706 U CN210111706 U CN 210111706U
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CN
China
Prior art keywords
rotor
cover
permanent magnet
stator
motor
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201921266855.3U
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Chinese (zh)
Inventor
陈才浪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Long-Term Vertical And Horizontal Technology Development Co Ltd
Original Assignee
Beijing Long-Term Vertical And Horizontal Technology Development Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to CN201921266855.3U priority Critical patent/CN210111706U/en
Application granted granted Critical
Publication of CN210111706U publication Critical patent/CN210111706U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a high-power permanent magnet brushless DC motor that does not need water-cooling, including casing and the rotor of establishing with the inside stator of casing and the inside cover of stator of setting, the both ends of casing are provided with preceding lid and back lid respectively, the side of preceding lid and back lid all inlays and is equipped with sealed bearing, the bearing both ends fixed connection of rotor is at sealed bearing's inner ring, the stator iron core groove has been seted up to the rotor inner wall. The utility model provides a high-power permanent magnet brushless DC motor that does not need water-cooling, through setting up the quantity that increases stator core groove and iron core, with the higher harmonic component amplitude that reduces magnetic field, all can reduce the iron core loss in the motor to a certain extent, through setting up heat absorption copper layer and heat transfer post, produce wind-force when making air supply arrangement rotatory, pass away in transferring the air with the heat of rotor through the louvre, thereby make this high-power permanent magnet brushless DC motor need not the water-cooling and also can reach good cooling effect.

Description

High-power permanent magnet brushless direct current motor without water cooling
Technical Field
The utility model relates to a direct current motor technical field specifically is a high-power permanent magnetism brushless direct current motor who does not need water-cooling.
Background
The technical difficulty of the electric automobile lies in the cruising ability, and the aspect of the electric automobile is an important technical difficulty in the aspect of researching a novel battery. Electric vehicles generally employ high-power permanent magnet brushless dc motors as power sources. However, when the motor is used in practice, the motor needs to be cooled by water cooling due to overhigh temperature, and the water cooling is driven by battery energy, so that the cruising performance of the electric automobile is undoubtedly reduced. The reason for generating heat of the permanent magnet brushless direct current motor is obtained through analysis and is as follows: the motor stator current not only generates copper loss in the coil, but also the harmonic component in the current can induce eddy current loss in the motor rotor sheath and the permanent magnet. There are also large air friction losses on the rotor surface due to the high speed rotation of the rotor. These losses are ultimately converted into heat, the losses occurring in the electrical machine being the predominant factor.
The water-cooling permanent magnet brushless direct current motor has a very complex internal structure and is complex to maintain, and a water pipeline is easy to rust to cause faults. Therefore, a high-power permanent magnet brushless direct current motor without water cooling is needed to save energy and improve cruising performance.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high-power does not need water-cooled permanent magnetism brushless DC motor to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a high-power permanent magnet brushless direct current motor without water cooling comprises a casing, a stator arranged in the casing and a rotor sleeved in the stator, wherein a front cover body and a rear cover body are respectively arranged at two ends of the casing, sealing bearings are embedded in the side surfaces of the front cover body and the rear cover body, two ends of the bearing of the rotor are fixedly connected with an inner ring of the sealing bearing, a stator iron core groove is formed in the inner wall of the rotor, an iron core is arranged in the stator iron core groove, an electric conductor is fixedly connected with the side surface of the stator, a fixing ring is fixedly connected with the inner wall of the left end of the casing, a Hall circuit board is fixedly connected with the side surface of the rear cover body, a circuit cover body is fixedly connected with the side surface of the rear cover body, induction magnetic steel is arranged in the circuit cover body, an air supply device is fixedly connected with the side surface, the rotor is characterized in that a heat transfer column is arranged inside the rotor main shaft, and a permanent magnet is arranged on the surface of the rotor main shaft.
Preferably, the side surface of the hall circuit board is fixedly connected with a power connector, and the power connector penetrates through the circuit cover body and extends to the outside of the circuit cover body.
Preferably, the air supply device comprises an air collecting cover arranged on the surface of the rotor spindle and a through pipe connected to the left end of the rotor spindle, the surface of the through pipe is provided with air supply fan blades, and the surface of the through pipe is provided with an air inlet hole.
Preferably, the surfaces of the permanent magnet and the rotor are provided with insulating layers to prevent magnetic leakage.
Preferably, a heat absorption copper layer with the thickness of 0.5mm is arranged on the surface of the middle section of the rotor spindle, and the heat absorption copper layer is connected with the heat transfer column.
Preferably, the number of the conductors is the same as the number of the iron cores, and the number of the iron cores is at least six.
Advantageous effects
The utility model provides a high-power permanent magnet brushless DC motor that does not need water-cooling, through setting up the quantity that increases stator core groove and iron core, with the higher harmonic component amplitude that reduces magnetic field, all can reduce the iron core loss in the motor to a certain extent, through setting up heat absorption copper layer and heat transfer post, produce wind-force when making air supply arrangement rotatory, pass away in transferring the air with the heat of rotor through the louvre, thereby make this high-power permanent magnet brushless DC motor need not the water-cooling and also can reach good cooling effect.
Drawings
FIG. 1 is a schematic view of a front cross-sectional structure of the present invention;
FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;
fig. 3 is a side view of the structure-displaying stator of the present invention.
In the figure: 1 machine shell, 2 stators, 3 rotors, 4 front cover bodies, 5 rear cover bodies, 6 sealing bearings, 7 stator iron core slots, 8 iron cores, 9 electric conductors, 10 fixing rings, 11 Hall circuit boards, 12 circuit cover bodies, 13 induction magnetic steels, 14 heat dissipation holes, 15 heat transfer columns, 16 permanent magnets, 17 power connectors, 18 air collecting covers, 19 through pipes, 20 air supply fan blades, 21 air inlet holes and 22 heat absorption copper layers.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: a high-power permanent magnet brushless direct current motor without water cooling comprises a machine shell 1, a stator 2 arranged in the machine shell and a rotor 3 sleeved in the stator 2, wherein a front cover body 4 and a rear cover body 5 are respectively arranged at two ends of the machine shell 1, a sealing bearing 6 is embedded in the side surfaces of the front cover body 4 and the rear cover body 5, two ends of the bearing of the rotor 3 are fixedly connected with an inner ring of the sealing bearing 6, a stator iron core groove 7 is formed in the inner wall of the rotor 3, an iron core 8 is arranged in the stator iron core groove 7, the number of the electric conductors 9 is the same as that of the iron cores 8, the number of the iron cores 8 is at least six, the side surface of the stator 2 is fixedly connected with the electric conductors 9, a fixing ring 10 is fixedly connected with the inner wall of the left end of the machine shell 1, a Hall circuit board 11 is fixedly connected with the side surface of the rear cover body 5, the side of circuit lid 12 is fixedly connected with air supply arrangement, and louvre 14 has been seted up to the inside of rotor 3 main shaft, and the inside of rotor 3 main shaft is provided with heat transfer post 15, and the surface of rotor 3 main shaft is provided with permanent magnet 16, and the side fixedly connected with power connection 17 of hall circuit board 11, and power connection 17 runs through circuit lid 12 and extends to the outside of circuit lid 12.
The air supply device comprises an air collecting cover 18 arranged on the surface of a main shaft of the rotor 3 and a through pipe 19 connected to the left end of the main shaft of the rotor 3, wherein the surface of the through pipe 19 is provided with an air supply fan blade 20, the surface of the through pipe 19 is provided with an air inlet 21, the surfaces of the permanent magnet 16 and the rotor 3 are both provided with insulating layers to prevent the magnetic leakage phenomenon, the surface of the middle section of the main shaft of the rotor 3 is provided with a heat absorption copper layer 22 with the thickness of 0.5mm, and the heat absorption copper layer 22 is connected with a heat transfer column 15, the utility model provides a high-power permanent magnet brushless direct current motor without water cooling, the number of stator iron core slots 7 and iron cores 8 is increased to reduce the higher harmonic component amplitude of a magnetic field, the loss of the iron cores 8 in the motor can be reduced to a certain degree, the air supply device generates wind power while rotating by arranging the heat absorption copper layer 22 and, therefore, the high-power permanent magnet brushless direct current motor can achieve an excellent cooling effect without water cooling.
The working principle is as follows: when this high-power permanent magnetism brushless DC motor that does not need water-cooling is when using, increase stator core slot 7 and the quantity of iron core 8 through the setting, with the higher harmonic component amplitude that reduces the magnetic field, iron core 8 loss in the motor all can be reduced to a certain extent, thereby reduce this DC motor's heat energy production, send fan blade 20 rotatory when rotor 3 is rotatory inside sending the air current into louvre 14 through supply-air hole 21, through setting up heat absorption copper layer 22 and heat transfer post 15, produce wind-force when making air supply arrangement rotatory, pass away in the heat transfer to the air with rotor 3 through louvre 14, thereby make this high-power permanent magnetism brushless DC motor need not the water-cooling and also can reach good cooling effect.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a high-power does not need water-cooled permanent magnetism brushless DC motor, includes casing (1) and sets up rotor (3) of establishing with inside stator (2) of casing and the inside cover of stator (2), its characterized in that: the improved motor stator is characterized in that a front cover body (4) and a rear cover body (5) are respectively arranged at two ends of the machine shell (1), sealing bearings (6) are embedded in the side faces of the front cover body (4) and the rear cover body (5), two ends of a bearing of the rotor (3) are fixedly connected to an inner ring of the sealing bearings (6), a stator iron core groove (7) is formed in the inner wall of the rotor (3), an iron core (8) is arranged in the stator iron core groove (7), an electric conductor (9) is fixedly connected to the side face of the stator (2), a fixing ring (10) is fixedly connected to the inner wall of the left end of the machine shell (1), a Hall circuit board (11) is fixedly connected to the side face of the rear cover body (5), a circuit cover body (12) is fixedly connected to the side face of the rear cover body (5), an induction magnetic steel (13) is arranged in the circuit cover body (, the heat dissipation hole (14) is formed in the main shaft of the rotor (3), the heat transfer column (15) is arranged in the main shaft of the rotor (3), and the permanent magnet (16) is arranged on the surface of the main shaft of the rotor (3).
2. The high-power permanent magnet brushless direct current motor without water cooling of claim 1, wherein: the side face of the Hall circuit board (11) is fixedly connected with a power connector (17), and the power connector (17) penetrates through the circuit cover body (12) and extends to the outside of the circuit cover body (12).
3. The high-power permanent magnet brushless direct current motor without water cooling of claim 1, wherein: the air supply device comprises an air collecting cover (18) arranged on the surface of the main shaft of the rotor (3) and a through pipe (19) connected to the left end of the main shaft of the rotor (3), an air supply fan blade (20) is arranged on the surface of the through pipe (19), and an air inlet hole (21) is formed in the surface of the through pipe (19).
4. The high-power permanent magnet brushless direct current motor without water cooling of claim 3, wherein: the surfaces of the permanent magnet (16) and the rotor (3) are provided with insulating layers, so that the magnetic leakage phenomenon is prevented.
5. The high-power permanent magnet brushless direct current motor without water cooling of claim 1, wherein: and a heat absorption copper layer (22) with the thickness of 0.5mm is arranged on the surface of the middle section of the main shaft of the rotor (3), and the heat absorption copper layer (22) is connected with the heat transfer column (15).
6. The high-power permanent magnet brushless direct current motor without water cooling of claim 1, wherein: the number of the conductors (9) is the same as that of the iron cores (8), and the number of the iron cores (8) is at least six.
CN201921266855.3U 2019-08-07 2019-08-07 High-power permanent magnet brushless direct current motor without water cooling Expired - Fee Related CN210111706U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921266855.3U CN210111706U (en) 2019-08-07 2019-08-07 High-power permanent magnet brushless direct current motor without water cooling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921266855.3U CN210111706U (en) 2019-08-07 2019-08-07 High-power permanent magnet brushless direct current motor without water cooling

Publications (1)

Publication Number Publication Date
CN210111706U true CN210111706U (en) 2020-02-21

Family

ID=69567632

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921266855.3U Expired - Fee Related CN210111706U (en) 2019-08-07 2019-08-07 High-power permanent magnet brushless direct current motor without water cooling

Country Status (1)

Country Link
CN (1) CN210111706U (en)

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20200221

Termination date: 20200807

CF01 Termination of patent right due to non-payment of annual fee