CN114825821A - Design method of permanent magnet direct current motor positioning groove for deflection angle adjustment - Google Patents

Design method of permanent magnet direct current motor positioning groove for deflection angle adjustment Download PDF

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CN114825821A
CN114825821A CN202210514284.0A CN202210514284A CN114825821A CN 114825821 A CN114825821 A CN 114825821A CN 202210514284 A CN202210514284 A CN 202210514284A CN 114825821 A CN114825821 A CN 114825821A
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groove
motor
end cover
positioning groove
angle
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CN114825821B (en
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谢佳娜
刘桂雄
谢振宇
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Jieyang Huibaochang Electric Appliance Co ltd
South China University of Technology SCUT
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Jieyang Huibaochang Electric Appliance Co ltd
South China University of Technology SCUT
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/14—Casings; Enclosures; Supports
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

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  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

The invention discloses a design method of a positioning groove of a permanent magnet direct current motor facing deflection angle adjustment, which comprises the following steps: the rotation angle of the electric brush and the end cover is fixed, so that the permanent magnet is connected with the shell, and the relative angle of the electric brush and the permanent magnet is changed by changing the assembly angle of the end cover around the rotating shaft of the motor; processing a convex block and a groove, and limiting the rotating assembly angle of the motor end cover and the shell through the matching of the convex block and the groove; and determining the adjustment degree of the deflection angle, calculating the processing position of the positioning groove, and realizing adjustment of various deflection angles by processing a plurality of positioning grooves. The invention can change the assembly deflection angle of the motor brush, reduce the processing difficulty and cost of the deflection angle adjustment by processing the positioning groove on the end cover of the motor shell, combine the slot position calculation, can process a plurality of positioning grooves at the same time, provide a plurality of deflection angle installation angles for the motor assembly, and improve the application flexibility of the deflection angle adjustment.

Description

Design method of permanent magnet direct current motor positioning groove for deflection angle adjustment
Technical Field
The invention relates to the technical field of permanent magnet direct current motors, in particular to a design method of a positioning groove of a permanent magnet direct current motor for adjusting a deflection angle.
Background
In the running process of the permanent magnet direct current motor, the armature magnetic field and the permanent magnet magnetic field interact to cause the air gap magnetic field of the motor to generate distortion to a certain degree, and the relative deflection angle of the electric brush and the permanent magnet is changed to enable the electric brush and the permanent magnet to deviate from the position of a neutral line, so that the air gap magnetic field distortion can be improved, and the problem that the EMC standard of the motor exceeds is optimized. In addition, different deflection angles can change the air gap field of the motor to different degrees, the air gap field is weakened to improve the rotating speed of the motor, the air gap field is strengthened to improve the torque of the motor, and therefore a method capable of flexibly adjusting the deflection angle is needed, a plurality of adjustment angles can be provided at the same time, and the flexibility of adjusting and applying the deflection angle is improved.
The method for adjusting the motor assembly angle mentioned in the prior patent, for example, CN210327292U provides a magnetic pole angle positioning structure of a rotary transformer for a permanent magnet synchronous motor, and adopts a stator flat key, a positioning pin, a bolt, a rotor flat key and the like to position components such as a shell, a rotor, a stator, a rear end cover and the like, so that the position relations of the components correspond, the zero adjustment efficiency of the rotary transformer is improved, the zero adjustment time of the rotary transformer is greatly shortened, but too many parts are introduced for realizing the positioning, and the processing and the assembly of the motor are not facilitated; CN210327292U provides a diaphragm pump motor end cover location structure, adopts end cover U-shaped draw-in groove and casing body inner wall boss to cooperate to realize end cover positioning, nevertheless this structure is out of shape easily, and the processing of end cover U-shaped draw-in groove is comparatively complicated.
1) "a resolver magnetic pole angle positioning structure for permanent magnet synchronous motor", patent No. CN210327292U, which discloses a resolver magnetic pole angle positioning structure for permanent magnet synchronous motor, comprising a casing, a circular ring-shaped permanent magnet synchronous motor stator, a permanent magnet synchronous motor rotor, a shaft, a resolver, wherein the resolver comprises a resolver stator and a resolver rotor, characterized in that the circular ring-shaped permanent magnet synchronous motor stator and the casing are positioned by a motor stator flat key, the casing and a rear end cover are positioned by a positioning pin, the resolver stator and the rear end cover are positioned by a bolt, the permanent magnet synchronous motor rotor and the shaft are positioned by a motor rotor flat key, the resolver rotor and the shaft are positioned by a resolver rotor flat key, the position relationship between the permanent magnet arranged on the permanent magnet synchronous motor rotor and the motor rotor flat key on the permanent magnet synchronous motor rotor and the position relationship between the permanent magnet on the resolver rotor and the motor rotor flat key Correspondingly, the position relation between the inserting line starting groove on the iron core of the circular permanent magnet synchronous motor stator and the motor stator flat key corresponds to the position relation between the inserting line starting groove on the iron core of the rotary transformer stator and the motor stator flat key.
2) "a diaphragm pump motor end cover location structure", patent number CN208656546U, this patent disclose a diaphragm pump motor end cover location structure, belong to diaphragm pump motor field, including front end housing body, casing body and rear end cap body, casing body outer wall is equipped with that two assembly signs are concave, casing body inner wall is equipped with two bosss, the front end housing is equipped with the front end housing tang, the medial surface of front end housing tang is equipped with front end housing U-shaped draw-in groove, front end housing U-shaped draw-in groove mutually supports with one of them boss, the rear end housing is equipped with the rear end housing tang, the medial surface of rear end housing tang is equipped with rear end housing U-shaped draw-in groove, rear end housing U-shaped draw-in groove mutually supports with another boss. The utility model discloses fix a position accurately, convenient assembling can guarantee the minimum off normal of armature angle, promotes the motor performance, but the processing of end cover U-shaped draw-in groove is comparatively complicated, and this structure is out of shape easily.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a method for designing a positioning groove of a permanent magnet dc motor for adjusting a deflection angle
The purpose of the invention is realized by the following technical scheme:
a design method for a positioning groove of a permanent magnet direct current motor facing deflection angle adjustment comprises the following steps:
a, fixing the rotation angle of the electric brush and the end cover to enable the permanent magnet to be connected with the shell, and changing the relative angle of the electric brush and the permanent magnet by changing the assembly angle of the end cover around the motor rotating shaft;
b, processing a convex block and a groove, and limiting the rotating assembly angle of the motor end cover and the shell through the matching of the convex block and the groove;
and C, determining the adjustment degree of the deflection angle, calculating the processing position of the positioning groove, and realizing adjustment of various deflection angles by processing a plurality of positioning grooves.
One or more embodiments of the present invention may have the following advantages over the prior art:
the method can change the assembly deflection angle of the motor brush, reduce the processing difficulty and cost of the deflection angle adjustment by processing the positioning groove on the end cover of the motor shell, combine the slot position calculation, can process a plurality of positioning grooves simultaneously, provide a plurality of deflection angle installation angles for the motor assembly, and improve the application flexibility of the deflection angle adjustment.
Drawings
FIG. 1 is a flow chart of a design method of a positioning groove of a permanent magnet direct current motor facing deflection angle adjustment;
FIG. 2 is a schematic view of the end cover in assembled relation with the rotor;
FIG. 3 is a schematic view of an end cap construction;
FIG. 4 is a schematic view of the assembly of the end cap protrusion and the positioning groove of the housing;
FIG. 5 is a schematic diagram showing the positional relationship between the positioning groove of the casing and the brushes and permanent magnets.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings.
As shown in fig. 1, the working process of the design method of the positioning groove of the permanent magnet direct current motor facing the adjustment of the deflection angle includes the following steps:
step 10, fixing the rotation angle of the electric brush and the end cover to enable the permanent magnet to be connected with the shell, and changing the relative angle of the electric brush and the permanent magnet by changing the assembly angle of the end cover around the rotating shaft of the motor;
step 20, processing a convex block and a groove, and limiting the rotation assembly angle of the motor end cover and the shell through the matching of the convex block and the groove; wherein, the convex block 101 is processed on the end cover of the motor, and the groove 201 is processed on the end part of the shell;
and step 30, determining the adjustment degree of the deflection angle, calculating the processing position of the positioning groove, and realizing adjustment of various deflection angles by processing a plurality of positioning grooves.
As shown in fig. 2 and 3, in the step 10, the brush 102 is disposed in the continuous feeding structure 103 for providing a centripetal force to the brush to ensure that the brush is in close contact with the commutator 301 mounted on the motor rotor 3 during the operation of the motor; the continuous feeding structure is fixed with the assembly angle of the end cover 1 and the brush 102 around the motor rotating shaft 302; the permanent magnet 202 is fixedly connected in the casing 2, and the assembly angle around the motor rotating shaft is fixed.
The diameter of the motor end cover in the step 20 is phi c The height of the bump is h b The width of the bump is l b End cover diameter of motor c Height h of bump b The relationship of (1) is:
h b ＝α b φ c
wherein alpha is b Is a coefficient of bump height, α b ∈[0.07φ c ,0.09φ c ]Let the end cover thickness be t b ，t b >At 0.8mm, α b ＝0.07φ c ，t b <0.7mm, α b ＝0.09φ c ；
Bump width l b Height h of bump b The relationship of (1) is:
l b ＝β b h b
wherein beta is b Is a coefficient of bump width, beta b ∈[5,6]，t b >Beta at 0.8mm b ＝5，t b <Beta at 0.7mm b ＝6；
The width of the groove processed at the end part of the shell is l g If the allowable error of the angle adjustment of the deflection angle is delta theta, the width l of the positioning groove of the housing is determined g Comprises the following steps:
Figure BDA0003640787830000041
as shown in FIG. 4, the grooves 201 of the housing 2 are deepDegree D g The thickness of the positioning groove of the machine shell is t s Then depth D of the groove g Comprises the following steps:
D g ＝2h b +2.1t s
the lug 101 and the groove are matched, that is, the lug of the end cover 1 is assembled in the positioning groove of the machine shell, and the section of the positioning groove is tightly attached to the section of the lug of the end cover.
In the above step 30, the deflection angle adjustment degree is determined, and the processing position of the positioning groove at the end of the housing is calculated, as shown in fig. 5, so that the brush 102 faces the positioning groove deflection angle θ of the neutral line position r Is 0 degree, under the condition of single positioning groove, the deflection angle position relative to 0 degree is adjusted by theta r Processing a positioning groove; under the condition of a plurality of positioning grooves, phi is ensured b Is the outer diameter of the casing, theta LG For the angular difference of adjacent positioning recesses, D b For the spacing of adjacent positioning grooves, for producing adjacent theta LG The positioning groove of (2), the distance D of the groove b Comprises the following steps:
Figure BDA0003640787830000042
although the embodiments of the present invention have been described above, the above descriptions are only for the convenience of understanding the present invention, and are not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (4)

1. A method for designing a positioning groove of a permanent magnet direct current motor facing deflection angle adjustment is characterized by comprising the following steps:
a, fixing the rotation angle of the electric brush and the end cover to enable the permanent magnet to be connected with the shell, and changing the relative angle of the electric brush and the permanent magnet by changing the assembly angle of the end cover around the motor rotating shaft;
b, processing a convex block and a groove, and limiting the rotating assembly angle of the motor end cover and the shell through the matching of the convex block and the groove;
and C, determining the adjustment degree of the deflection angle, calculating the processing position of the positioning groove, and realizing adjustment of various deflection angles by processing a plurality of positioning grooves.
2. The method for designing a permanent magnet direct current motor positioning groove facing deflection angle adjustment according to claim 1, wherein the brushes in the A are arranged in a continuous feeding structure and used for providing centripetal force for the brushes and ensuring the close contact of the brushes and a commutator in the motor operation process; the continuous feeding structure is fixed with the end cover and the assembly angle of the electric brush around the motor rotating shaft; the permanent magnet is fixedly connected in the shell and is fixed around the assembly angle of the motor rotating shaft.
3. The method for designing a positioning groove of a permanent magnet direct current motor facing deflection angle adjustment according to claim 1, wherein the B center protrusion is processed on a motor end cover, and the groove is processed on an end portion of a housing, wherein the diameter of the motor end cover is phi c The height of the bump is h b The width of the bump is l b End cover diameter of motor c Height h of bump b The relationship of (1) is:
h b ＝α b φ c
wherein alpha is b Is a coefficient of bump height, α b ∈[0.07φ c ,0.09φ c ]Let the end cover thickness be t b ，t b >At 0.8mm, α b ＝0.07φ c ，t b <0.7mm, α b ＝0.09φ c ；
Bump width l b Height h of bump b The relationship of (1) is:
l b ＝β b h b
wherein beta is b Is a coefficient of bump width, beta b ∈[5,6]，t b >Beta at 0.8mm b ＝5，t b <Beta at 0.7mm b ＝6；
The width of the groove processed at the end part of the shell isl g If the allowable error of the angle adjustment of the deflection angle is delta theta, the width l of the positioning groove of the housing is determined g Comprises the following steps:
Figure FDA0003640787820000011
the depth of the groove of the shell is D g The thickness of the positioning groove of the machine shell is t s Then depth D of the groove g Comprises the following steps:
D g ＝2h b +2.1t s
the lug and the groove are matched, the lug of the end cover is assembled in the positioning groove of the machine shell, and the section of the positioning groove is tightly attached to the section of the lug of the end cover.
4. The method as claimed in claim 1, wherein the angle of deflection adjustment is determined in step C, the machining position of the positioning groove at the end of the housing is calculated, and the angle of deflection θ of the positioning groove at the position where the brush faces the neutral line is calculated r Is 0 degree, under the condition of single positioning groove, the deflection angle position relative to 0 degree is adjusted by theta r Processing a positioning groove; under the condition of a plurality of positioning grooves, phi is ensured b Is the outer diameter of the casing, theta LG For the angular difference of adjacent positioning recesses, D b For the spacing of adjacent positioning grooves, for producing adjacent theta LG The positioning groove of (2), the distance D of the groove b Comprises the following steps:
Figure FDA0003640787820000021
CN202210514284.0A 2022-05-12 2022-05-12 Design method of permanent magnet direct current motor positioning groove for deflection angle adjustment Active CN114825821B (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1505242A (en) * 2002-11-30 2004-06-16 德昌电机股份有限公司 End cap assembly
JP2007259510A (en) * 2006-03-20 2007-10-04 Denso Corp Dc motor
CN102130544A (en) * 2011-03-05 2011-07-20 杨学勤 Method for manufacturing high-efficiency generator and high-efficiency multi-rotor multi-stator interactive generator
CN102710037A (en) * 2011-10-14 2012-10-03 谢向荣 Uni-directional motor
CN207251327U (en) * 2017-10-18 2018-04-17 冯西川 A kind of complex superposition magnetic circuit permanent magnet DC brushless motor
CN208571755U (en) * 2018-08-04 2019-03-01 温岭市东菱电机有限公司 A kind of Low gullet torque brushless, permanently elevator door motor
CN109599975A (en) * 2018-04-24 2019-04-09 东风汽车电气有限公司 A kind of starter
CN210327292U (en) * 2019-08-25 2020-04-14 合普动力股份有限公司 Rotary transformer magnetic pole angle positioning structure for permanent magnet synchronous motor

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1505242A (en) * 2002-11-30 2004-06-16 德昌电机股份有限公司 End cap assembly
JP2007259510A (en) * 2006-03-20 2007-10-04 Denso Corp Dc motor
CN102130544A (en) * 2011-03-05 2011-07-20 杨学勤 Method for manufacturing high-efficiency generator and high-efficiency multi-rotor multi-stator interactive generator
CN102710037A (en) * 2011-10-14 2012-10-03 谢向荣 Uni-directional motor
CN207251327U (en) * 2017-10-18 2018-04-17 冯西川 A kind of complex superposition magnetic circuit permanent magnet DC brushless motor
CN109599975A (en) * 2018-04-24 2019-04-09 东风汽车电气有限公司 A kind of starter
CN208571755U (en) * 2018-08-04 2019-03-01 温岭市东菱电机有限公司 A kind of Low gullet torque brushless, permanently elevator door motor
CN210327292U (en) * 2019-08-25 2020-04-14 合普动力股份有限公司 Rotary transformer magnetic pole angle positioning structure for permanent magnet synchronous motor

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