CN106816975B - Permanent magnet synchronous motor magnetic steel surface-mounted rotor oblique pole structure and manufacturing process - Google Patents
Permanent magnet synchronous motor magnetic steel surface-mounted rotor oblique pole structure and manufacturing process Download PDFInfo
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- CN106816975B CN106816975B CN201710136284.0A CN201710136284A CN106816975B CN 106816975 B CN106816975 B CN 106816975B CN 201710136284 A CN201710136284 A CN 201710136284A CN 106816975 B CN106816975 B CN 106816975B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 112
- 239000010959 steel Substances 0.000 title claims abstract description 112
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 238000003825 pressing Methods 0.000 claims description 12
- 238000004080 punching Methods 0.000 claims description 11
- 230000005389 magnetism Effects 0.000 claims description 7
- 238000002955 isolation Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 238000003754 machining Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 8
- 230000010349 pulsation Effects 0.000 abstract description 3
- 239000011162 core material Substances 0.000 description 99
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 5
- 238000003475 lamination Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 241001494479 Pecora Species 0.000 description 1
- 238000012356 Product development Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/278—Surface mounted magnets; Inset magnets
-
- 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
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention discloses a magnet steel surface-mounted rotor oblique pole structure of a permanent magnet synchronous motor and a manufacturing process thereof, wherein a rotor comprises a main shaft, a rotor iron core arranged on the main shaft, and a plurality of magnet steels which are arranged on the rotor iron core and are integral multiples of the pole number of the permanent magnet synchronous motor, each magnet steel is mounted on the outer circumferential surface of the rotor iron core, the plurality of magnet steels are distributed at intervals along the circumferential direction of the rotor iron core, each magnet steel comprises a plurality of sections of unit magnet steels which are sequentially arranged along the axial extension direction of the rotor iron core, adjacent end surfaces of two sections of adjacent unit magnet steels are in close contact, and the adjacent two sections of unit magnet steels are staggered by an angle or distance along the axial extension direction of the rotor iron core in the same direction along the circumferential direction of the rotor iron core. The rotor forms a rotor structure with oblique poles through the surface-mounted magnetic steel, and the purpose of a rotor chute is realized through the oblique poles of the rotor, so that torque pulsation and higher harmonics of the permanent magnet motor are reduced, stray loss is reduced, and the efficiency of the permanent magnet motor is improved.
Description
Technical Field
The invention relates to the technical field of permanent magnet synchronous motors, in particular to a magnet steel surface-mounted rotor oblique pole structure of a permanent magnet synchronous motor and a manufacturing process.
Background
According to statistical measurement and calculation, the electric motor in China has about 17 hundred million kilowatts, the total electric consumption is about 3 trillion kilowatt hours, and the total electric consumption of the electric motor in the industrial field is about 64% of the total electric consumption in the whole society, wherein the total electric consumption of the electric motor in the industrial field is about 2.6 trillion kilowatts, and the electric motor system energy-saving engineering is listed in the electric motor system energy-saving engineering in the state when the energy saving and emission reduction are advanced and the organization implements ten-large energy-saving engineering, and the electric motor system energy-saving engineering is firstly advanced to the standard platform construction, so that the energy efficiency limit value and the energy efficiency grade of the small and medium-sized asynchronous motor in the state are close to the international electric motor industry standard system, and in the GB18613-2012 standard, the energy efficiency grade 2 is confirmed as a high-efficiency motor, which is equivalent to IE3 grade in the IEC60034-30 standard, and is improved by 1 grade compared with the GB18613-2006 standard.
The national quality supervision and inspection and quarantine administration and the national standardization management committee of China release on the year 2012, the month 6 and the day 29, and implement GB/T28575-2012, YE3 series (1P 55) ultra-high efficiency three-phase asynchronous motor technical conditions (base No. 80-355) on the year 2012, the 11 and the month 1, and the efficiency value specified in the document is the same as the 2-level energy efficiency limiting value in GB 18613-2012.
In this way, the newly designed motor has certain difficulty in reaching the 2-level energy efficiency of the GB18613-2012 standard and the energy efficiency limiting value regulated in the GB/T28575-2012 standard, so that the design technology, the manufacturing process, the material cost and the like are greatly improved when the YE3 series is designed, the high-efficiency 2-level motor needs to be achieved by balancing various losses and performances of the motor through adjusting iron core materials, slot-shaped dimensions and winding data, and even if the IEC approved IE5 efficiency limiting value is reached, the 1-level energy efficiency of the motor in China is further improved, and the whole series is almost impossible to reach the 1-level energy efficiency.
The energy efficiency value of the permanent magnet motor can reach 1 level or even be higher than 1 level, so that the product development target is inclined to the permanent magnet motor in the middle and small motor industry in China, and the permanent magnet motor is listed as the lead sheep for the development of the middle and small motor in the twenty-first century in China.
Under the guidance of national policies and the excitation of civil engineering, the motor users in China have increasingly high enthusiasm to adopt high-efficiency motors, the market of permanent magnet motors has increasingly expanded, and the types and varieties of permanent magnet motors required by users have increasingly increased.
From the perspective of motor design, in order to optimize the waveform of the air-gap field, the most effective method for weakening cogging torque is usually implemented by adopting a chute. For example, in Y and Y2 series three-phase asynchronous motors, a straight slot is used for the stator, and a chute is used for the damping rod of the rotor damping cage. Due to the limitation of the conditions, when designing the permanent magnet motor, the conventional stator chute is not allowed due to various conditions, which inevitably forces the rotor to adopt the chute, but once the rotor adopts the chute, the magnetic steel chute and the magnetic steel are inevitably S-shaped, as shown in fig. 1, even if the magnetic steel adopts the surface-mounted type, the magnetic steel is difficult to realize due to the distortion of the surface of the magnetic steel.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art, and provides a magnet steel surface-mounted rotor oblique pole structure of a permanent magnet synchronous motor.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the utility model provides a permanent magnet synchronous motor magnet steel table pastes formula rotor oblique pole structure, the rotor includes the main shaft, overlaps establishes rotor core on the main shaft, set up rotor core is last and with a plurality of magnet steel of integer multiple of permanent magnet synchronous motor's pole number, every magnet steel all paste and establish on rotor core's the outer periphery, a plurality of magnet steel is followed rotor core's circumferencial direction interval distribution, every magnet steel all includes along rotor core's axis extending direction sets gradually multistage unit magnet steel in proper order, same pole adjacent two sections of magnet steel the adjacent terminal surface in close contact of unit magnet steel, along rotor core's axis extending direction, same pole adjacent two sections of magnet steel unit magnet steel staggers an angle or distance in the circumferencial direction of rotor core in same direction.
Preferably, the angles or distances of the adjacent two sections of unit magnetic steel staggered in the circumferential direction of the rotor core are the same, and the staggered angles are as follows: (360/stator slot number)/(number of unit magnetic steels-1); alternatively, the offset distance is: ((number of stator slots×rotor pitch)/(number of stator slots+number of motor pole pairs))/(number of unit magnetic steels-1).
Preferably, each magnetic steel is in a tile-shaped structure, and each magnetic steel comprises an arc-shaped outer edge and an arc-shaped inner edge.
Further, the radius sizes of the outer edge and the inner edge are the same, and the circle centers are located at different positions.
Further, the radius sizes of the outer edge and the inner edge are different, and the circle centers are positioned at the same position.
Preferably, each magnetic steel comprises a plurality of magnetic strips sequentially arranged along the circumferential direction of the rotor core, and two adjacent sections of adjacent end faces of the magnetic strips are in close contact.
Preferably, a distance of 2-4 mm is provided between two adjacent magnetic steels along the circumferential direction of the rotor core.
Preferably, a slot is provided on the outer circumferential surface of the rotor core at a position corresponding to the magnetic steel, and the slot extends along the axial direction of the rotor core and penetrates through two ends of the rotor core in the axial direction.
Preferably, the rotor further comprises a sheath sleeved outside the magnetic steel, and the sheath is made of a material with magnetism isolating effect.
The invention also provides a manufacturing process of the permanent magnet synchronous motor magnetic steel surface-mounted rotor oblique pole structure, which comprises the following steps:
(1) Manufacturing a plurality of rotor core punched pieces constituting the rotor core;
(2) Pressing and connecting the plurality of rotor core punching sheets in the step (1) together to form the rotor core;
(3) Sleeving the rotor core on the main shaft;
(4) Finish machining is carried out on the outer circumferential surface of the rotor core sleeved on the main shaft;
(5) The magnetic steel is attached to the outer circumferential surface of the rotor core;
(6) A sheath with magnetism isolating function is sleeved outside the rotor core to which the magnetic steel is attached;
(7) And the two ends of the rotor core in the axial direction are respectively provided with a magnetic isolation plate, and the magnetic isolation plates are fixedly connected with the rotor core.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: according to the magnet steel surface-mounted rotor oblique pole structure of the permanent magnet synchronous motor, each magnet steel attached to the outer circumferential surface of the rotor core is divided into a plurality of sections of unit magnet steel along the extending direction of the axis of the rotor core, and two adjacent sections of unit magnet steel of the same pole magnet steel are staggered for a certain distance or angle in the circumferential direction of the rotor core to form the oblique pole type rotor structure, and the purpose of rotor chute is achieved through the rotor oblique pole, so that torque pulsation and higher harmonic waves of the permanent magnet motor are reduced, stray loss is reduced, and the efficiency of the permanent magnet motor is improved.
Drawings
FIG. 1 is a schematic view of a prior art structure of a rotor chute of a permanent magnet motor;
fig. 2 is a schematic structural diagram of a magnet steel surface-mounted rotor of the permanent magnet synchronous motor;
FIG. 3 is a schematic structural diagram of a magnetic steel of the permanent magnet synchronous motor of the present invention;
FIG. 4 is a second schematic structural diagram of the magnetic steel of the permanent magnet synchronous motor of the present invention;
fig. 5 is a schematic structural view of a permanent magnet synchronous motor according to the present invention, in which magnetic steel is attached to an outer circumferential surface of a rotor core;
fig. 6 is a schematic structural view of the permanent magnet synchronous motor of the present invention after being attached to the outer circumferential surface of the rotor core and then being unfolded; fig. 7 is a schematic structural view of a rotor core sheet according to the present invention;
fig. 8 is a schematic structural view of a press-fitting apparatus for press-fitting a rotor core according to the present invention.
Wherein: 1. a main shaft; 2. a rotor core; 21. rotor core punching; 211. a mounting hole; 3. magnetic steel; 31. unit magnetic steel; 32. a magnetic stripe; 33. a magnetic block; 4. a sheath; 5. a magnetism isolating plate;
100. a lower pressing plate; 200. an upper press plate; 300. a mandrel; 400. pressing into blocks; 500. and a second fastener.
Detailed Description
The technical scheme of the invention is further described below with reference to the attached drawings and specific embodiments.
As shown in fig. 2, the magnet steel surface-mounted rotor oblique pole structure of the permanent magnet synchronous motor comprises a main shaft 1, a rotor core 2 sleeved on the main shaft 1, and a plurality of magnet steels 3 which are arranged on the rotor core 2 and are integral multiples of the pole number of the permanent magnet synchronous motor.
Each magnetic steel 3 is attached to the outer circumferential surface of the rotor core 2, a plurality of magnetic steels 3 are distributed at intervals along the circumferential direction of the rotor core 2, each magnetic steel 3 comprises a plurality of sections of unit magnetic steels 31 which are sequentially arranged along the extending direction of the axis of the rotor core 2, adjacent end faces of two sections of unit magnetic steels 31 of the same pole magnetic steel 3 are in close contact, the adjacent two sections of unit magnetic steels 31 of the same pole magnetic steel 3 are slightly staggered by an angle or distance along the extending direction of the axis of the rotor core 2 along the same direction in the circumferential direction of the rotor core 2, and therefore an oblique pole type rotor structure is formed, and the purpose of a rotor chute is achieved through oblique poles of a rotor.
Preferably, the values of the distances or angles at which the adjacent two sections of unit magnetic steels 31 of the same pole magnetic steel 3 are offset in the circumferential direction of the rotor core 2 are the same along the axial extending direction of the rotor core 2.
In this embodiment, taking a 132M-4.5 kw permanent magnet motor as an example, each magnet steel 3 comprises 5 sections of unit magnet steel 31, the stator of the motor is 28 slots, and the distance t of the whole rotor chute sk Expressed in terms of angle:
the distance of the rotor chute is distributed to 5 sections of unit magnetic steels 31, and the angles of staggering adjacent two sections of unit magnetic steels 31 in the circumferential direction of the rotor core 2 are as follows:
the distance tsk of the entire rotor chute is expressed in terms of distance:
wherein:
Q 2 the number of stator slots is 28;
p is the pole pair number of the motor and is 2;
t 2 for the pitch of the rotor, the rotor is provided with a plurality of teeth,here D 2 Is the outer diameter of the rotor, 134mm, calculate
So that
The distance of the rotor chute is distributed to 5 sections of unit magnetic steels 31, and the staggered distance of two adjacent sections of unit magnetic steels 31 is as follows:
as shown in fig. 5 and 6, each magnetic steel 3 includes a plurality of magnetic strips 32 sequentially arranged in the circumferential direction of the rotor core 2, and adjacent end surfaces of two adjacent magnetic strips 32 are closely contacted with each other, so that each magnetic steel 3 is divided into a plurality of small magnetic blocks 33, and adjacent end surfaces of two adjacent magnetic blocks 33 are closely contacted with each other along the axial direction and the circumferential direction of the rotor core 2, and adjacent small magnetic blocks 33 on the same magnetic strip 32 are slightly offset by an angle or distance in the same direction in the circumferential direction of the rotor core 2.
As shown in fig. 5, a small gap of 2 to 4mm may be used between two adjacent magnetic steels 3 in the circumferential direction of the rotor core 2, and the gap plays a role of magnetism isolation to prevent inter-pole magnetic short circuit, thereby weakening the magnetic flux of each pole of the magnetic steels 3.
Each magnetic steel 3 is in a tile-shaped structure, as shown in fig. 3 and 4, each magnetic steel 3 comprises an arc-shaped outer edge and an arc-shaped inner edge, and the centers of the outer edge and the inner edge can be arranged at the same position, namely the outer edge and the inner edge are concentrically arranged, and at the moment, the radius sizes of the outer edge and the inner edge are different, as shown in fig. 3; the outer edge and the inner edge may have the same radius, the center of the circle is not at the same position, and a distance L is provided between the outer edge and the inner edge, as shown in fig. 4, the magnetic steel 3 with the same radius but different concentric arrangement between the outer edge and the inner edge has better voltage waveform, current waveform and sine degree due to the polar arc.
The magnetic steel 3 is adhered to the outer circumferential surface of the rotor core 2 through an adhesive, and in order to increase the firmness of the adhered magnetic steel 3, a slot is formed in the outer circumferential surface of the rotor core 2 at the position where the magnetic steel 3 is adhered, and the slot is used for storing the adhesive, so that the adhesion area of the magnetic steel 3 and the outer circumferential surface of the rotor core 2 is increased, and the slot penetrates through two ends of the rotor core 2 in the axial direction.
The rotor further comprises a sheath 4 for protecting the magnetic steel 3 after the magnetic steel 3 is attached to the outer circumference of the rotor core 2, the sheath 4 is of a cylindrical structure, and the sheath is thermally sleeved outside the rotor core 2 after the magnetic steel 3 is attached. The sheath 4 is made of a material with magnetism isolating function, and in this embodiment, the sheath 4 is made of a 1Cr18Ni9 stainless steel material.
The rotor further includes magnetic shielding plates 5 provided at both end portions in the axial direction of the rotor core 2, both end surfaces in the axial direction of the rotor core 2 abut against the corresponding one side of the magnetic shielding plates 5, respectively, and the rotor core 2 is fixedly connected with the two side of the magnetic shielding plates 5.
The manufacturing process of the rotor is as follows:
(1) A plurality of rotor core punched pieces 21 constituting the rotor core 2 are manufactured:
the rotor core 2 is made of a plurality of rotor core laminations 21 stacked together, and the structure of the rotor core laminations 21 is shown in fig. 7. In this embodiment, the rotor core sheet 21 is formed by punching low-loss silicon steel 50W350, and the rotor core 2 includes 290 rotor core sheets 21 in total.
(2) Press fitting of the rotor core 2:
A. as shown in fig. 8, a press-fitting apparatus for press-fitting rotor core 2 is manufactured, and includes lower press plate 100, upper press plate 200, mandrel 300, and upper press block 400. The rotor core punching sheet 21 is sleeved in the middle of the mandrel 300, two ends of the mandrel 300 are respectively connected with the upper pressing plate 200 and the lower pressing plate 100, and in order to reduce the friction force of the mandrel 300 when the mandrel 300 is pulled out of the shaft hole of the rotor core 2 after being pressed, the mandrel 300 is designed into three sections: the diameter of the two end parts of the central shaft is smaller than that of the central part;
B. fixedly connecting one end of a mandrel 300 to the lower pressure plate 100, and sleeving a plurality of rotor core punching sheets 21 into the mandrel 300 in sequence;
C. each rotor core punching sheet 21 is provided with a mounting hole 211 for mounting a first fastening piece, after a certain number of rotor core punching sheets 21 are sleeved, a test rod is adopted to detect whether the mounting holes 211 can pass or not, if not, the position of the rotor core punching sheet 21 is adjusted to enable the test rod to pass smoothly, and accordingly the rest rotor core punching sheets 21 are sleeved into the mandrel 300 in sequence. Taking a 132M-4.5 kw permanent magnet motor as an example, the height of the rotor core 2 is 145mm, and when a certain number of rotor core punching sheets 21 are sleeved on the mandrel 300 to enable the lamination heights to reach 50mm, 100mm and 145mm, test bars are respectively adopted to detect the mounting holes 211;
D. the upper pressing plate 200 is sleeved on the mandrel 300 and pressed on the plurality of rotor core punched sheets 21 which are stacked together, the upper pressing block 400 is arranged on the upper pressing plate 200, and the upper pressing plate 200, the plurality of rotor core punched sheets 21, the lower pressing plate 100 and the mandrel 300 are fixed together through the second fastening piece 500;
E. applying pressure to the upper press block 400, when the height of the rotor core 2 reaches a desired height under the pressure, in this embodiment, when the height of the rotor core 2 reaches 145mm, re-tightening the second fastening member 500, and then passing the first fastening member through the mounting hole 211 in step C in a state where the second fastening member 500 is tightened, and tightening, thereby fixedly connecting the plurality of rotor core laminations 21 together;
F. the second fastening member 500 is released, the upper press block 400 and the upper press plate 200 are removed after the pressure is released, and the stacked molded rotor core 2 is taken out.
(3) The rotor core 2 is sleeved on the main shaft 1:
and (3) putting the whole rotor core 2 formed in the step (2) into an oven, gradually heating to 250 ℃, keeping the temperature for two hours, and then taking out the rotor core 2 to thermally sleeve the rotor core on the main shaft 1.
(4) The outer circumferential surface of the rotor core 2 fitted over the spindle 1 is finished to a desired size.
(5) The magnetic steel 3 is attached to the outer circumferential surface of the rotor core 2:
when the magnetic steel 3 is adhered to the outer circumferential surface of the rotor core 2, two adjacent unit magnetic steels 31 are staggered by an angle and a distance in the same direction in the circumferential direction of the rotor core 2, so that a skewed pole type rotor structure is formed, and the purpose of rotor chute is achieved.
The magnetic steel 3 is adhered to the outer circumferential surface of the rotor core 2 by using an adhesive, and in this embodiment, KDS04A2 type anaerobic adhesive is used as the adhesive. In the bonding, an adhesive is placed in a groove on the outer circumferential surface of the rotor core 2, and in this embodiment, the groove has a width of 5mm and a depth of 4mm.
(6) The outer part of the rotor core 2, to which the magnetic steel 3 is attached, is sleeved with a sheath 4:
the sheath 4 is heated and then is thermally sleeved outside the rotor core 2 attached with the magnetic steel 3, the sheath 4 is cooled and then is tightly tightened with interference, and the interference is 8-10 um, so that the magnetic steel 3 is fixed between the sheath 4 and the rotor core 2, and the magnetic steel 3 flies out after the adhesive between the magnetic steel 3 and the rotor core 2 fails when the rotor core 2 rotates.
(7) The magnetic shielding plates 5 are respectively mounted at both ends of the rotor core 2 in the axial direction, and when mounting, both end surfaces of the rotor core 2 in the axial direction are respectively abutted against the corresponding one of the magnetic shielding plates 5, and then the two magnetic shielding plates 5 are fixedly connected with the rotor core 2.
Therefore, the rotor is machined and manufactured, then the dynamic balance test is carried out on the machined rotor, and the rotor can be used after meeting the test requirement. The rotor structure designed in this way can reduce torque pulsation and higher harmonics of the permanent magnet motor, reduce stray loss and improve the efficiency of the permanent magnet motor.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (5)
1. The utility model provides a permanent magnet synchronous motor magnet steel table pastes formula rotor oblique pole structure, the rotor includes main shaft, cover establish rotor core on the main shaft, set up on the rotor core and with a plurality of magnet steel of permanent magnet synchronous motor's pole number integer multiple, its characterized in that: each magnet steel is pasted and is established on the outer periphery of rotor core, a plurality of magnet steels follow the circumferencial direction interval distribution of rotor core, every magnet steel all includes along the axis extending direction of rotor core sets gradually multistage unit magnet steel in proper order, same utmost point two adjacent terminal surface in close contact of unit magnet steel, follow the axis extending direction of rotor core, same utmost point two adjacent section in unit magnet steel of magnet steel is in the circumferencial direction of rotor core staggers an angle or distance to same direction, every magnet steel all is tile-shaped structure, every magnet steel all includes and is curved outward flange and inward flange, the outward flange with the radius size of inward flange is the same, the centre of a circle is located different position department, every magnet steel all includes along the circumferencial direction of rotor core sets gradually a plurality of magnetic stripes, two adjacent terminal surfaces in close contact of magnetic stripe, correspond on the outer periphery of rotor core is pasted and is established the position department of magnet steel, slotting is followed the rotor core and is the axial direction of rotor core staggers the both ends in the axial direction of rotor core is the axial direction of the same and stagger distance is in the axial direction of the adjacent both ends of rotor core: ((number of stator slots×rotor pitch)/(number of stator slots+number of motor pole pairs))/(number of unit magnetic steels-1).
2. The permanent magnet synchronous motor magnetic steel surface-mounted rotor oblique pole structure according to claim 1, wherein: the angles of staggering the adjacent two sections of unit magnetic steel in the circumferential direction of the rotor core are the same, and the staggering angles are as follows: (360/stator slot number)/(number of unit magnetic steels-1).
3. The permanent magnet synchronous motor magnetic steel surface-mounted rotor oblique pole structure according to claim 1 or 2, characterized in that: and a distance of 2-4 mm is arranged between two adjacent magnetic steels along the circumferential direction of the rotor core.
4. The permanent magnet synchronous motor magnetic steel surface-mounted rotor oblique pole structure according to claim 1, wherein: the rotor also comprises a sheath sleeved outside the magnetic steel, and the sheath is made of a material with magnetism isolating effect.
5. A process for manufacturing a magnet steel surface-mounted rotor oblique pole structure of a permanent magnet synchronous motor as claimed in any one of claims 1 to 4, which is characterized in that: the manufacturing process is as follows:
(1) Manufacturing a plurality of rotor core punched pieces constituting the rotor core;
(2) Pressing and connecting the plurality of rotor core punching sheets in the step (1) together to form the rotor core;
(3) Sleeving the rotor core on the main shaft;
(4) Finish machining is carried out on the outer circumferential surface of the rotor core sleeved on the main shaft;
(5) The magnetic steel is attached to the outer circumferential surface of the rotor core;
(6) A sheath with magnetism isolating function is sleeved outside the rotor core to which the magnetic steel is attached;
(7) And the two ends of the rotor core in the axial direction are respectively provided with a magnetic isolation plate, and the magnetic isolation plates are fixedly connected with the rotor core.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710136284.0A CN106816975B (en) | 2017-03-09 | 2017-03-09 | Permanent magnet synchronous motor magnetic steel surface-mounted rotor oblique pole structure and manufacturing process |
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| CN201710136284.0A CN106816975B (en) | 2017-03-09 | 2017-03-09 | Permanent magnet synchronous motor magnetic steel surface-mounted rotor oblique pole structure and manufacturing process |
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| CN106816975A CN106816975A (en) | 2017-06-09 |
| CN106816975B true CN106816975B (en) | 2024-02-06 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107707050A (en) * | 2017-10-31 | 2018-02-16 | 广州市耐诺电器有限公司 | A kind of rotor |
| CN110417207A (en) * | 2019-06-18 | 2019-11-05 | 安徽皖南电机股份有限公司 | The assembly method of rotor magnetic steel |
| CN110518760A (en) * | 2019-09-19 | 2019-11-29 | 安徽广博机电制造股份有限公司 | A kind of magneto magnet-pasting machine |
| CN112769266A (en) * | 2021-01-20 | 2021-05-07 | 贵州航天林泉电机有限公司 | Surface-mounted magnetic steel rotor structure with segmented oblique poles |
| CN114421669A (en) * | 2021-12-27 | 2022-04-29 | 马勒汽车技术(苏州)有限公司 | Rotor magnetic steel sheet, rotor oblique pole unit and oblique pole type rotor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457377A (en) * | 2013-09-03 | 2013-12-18 | 蒂森克虏伯电梯（上海）有限公司 | Packaging structure of skewing permanent magnet motor |
| CN206481198U (en) * | 2017-03-09 | 2017-09-08 | 江苏久知电机技术有限公司 | A kind of permasyn morot magnet steel surface-mounted rotor |
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2017
- 2017-03-09 CN CN201710136284.0A patent/CN106816975B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457377A (en) * | 2013-09-03 | 2013-12-18 | 蒂森克虏伯电梯（上海）有限公司 | Packaging structure of skewing permanent magnet motor |
| CN206481198U (en) * | 2017-03-09 | 2017-09-08 | 江苏久知电机技术有限公司 | A kind of permasyn morot magnet steel surface-mounted rotor |
Non-Patent Citations (1)
| Title |
|---|
| 永磁同步电机转子分段斜极的分析研究;彭俊等著;《大功率交流技术》;第50-53、58页 * |
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| CN106816975A (en) | 2017-06-09 |
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