CN105680593A - Rotor structure of servo motor - Google Patents
Rotor structure of servo motor Download PDFInfo
- Publication number
- CN105680593A CN105680593A CN201610228538.7A CN201610228538A CN105680593A CN 105680593 A CN105680593 A CN 105680593A CN 201610228538 A CN201610228538 A CN 201610228538A CN 105680593 A CN105680593 A CN 105680593A
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- CN
- China
- Prior art keywords
- magnet ring
- rotor structure
- ring unit
- rotating shaft
- magnetic pole
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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.)
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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
-
- 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)
Abstract
The invention relates to the technical field of permanent magnet alternating current servo motors, and especially relates to a rotor structure of a servo motor. The rotor structure of the servo motor comprises a rotation shaft and a plurality of magnetic ring units. The plurality of magnetic ring units sleeve the outer side of the rotation shaft respectively with an axial rotation angle so as to form a magnetic ring of the rotor structure. According to the invention, the rotor structure of the invention uses the segmented magnetic ring, so that the defect that the machining process length of a single magnetic ring is limited is overcome, and the long-type motor can be conveniently designed; in addition, the heteropolar square sintered Nd-Fe-B magnetic ring is adopted, the reject ratio in the assembling process is lowered, and a chute effect is achieved by specific rotation angles in the assembling process.
Description
Technical field
The present invention relates to permanent-magnet alternating current servo motor technical field, particularly relate to the rotor structure of a kind of servomotor.
Background technology
The advantages such as the driving of industrial sewing machine in recent years is increasingly employed permanent-magnet servo motor and is driven controlling, and AC servo motor is high with its control accuracy, torque frequency feature is good and acceleration is good are widely used in the occasion that the requirement of some control accuracies is higher. Along with improving constantly of industrial automatization, overload capacity and volume to servomotor have had new requirement.
At present, the rotor of the micro servo motor radiation ring magnet steel that adopts, but magnet steel limited length system more, and the surface magnetic flux density of radiation ring magnet ring is not high enough. Later along with the production domesticization of pole anisotropy sintered NdFeB multi-pole magnet-ring technique, pole anisotropy multi-pole magnet-ring is begun to use to substitute radiation ring multi-pole magnet-ring. But pole anisotropy magnet ring limits due to technique, and as magnetic pole to make oblique polar angle, the fraction defective that magnetizes is too high, adds manufacturing cost.
Summary of the invention
In view of the above problems, the present invention provides a kind of rotor structure, is applied to permanent-magnet alternating current servo motor, solves traditional oblique pole of anisotropy sintered NdFeB, pole and magnetizes the problem that difficulty is big, manufacturing cost is high.
This invention address that the technical scheme that above-mentioned technical problem adopts is:
There is provided the rotor structure of a kind of servomotor, including a rotating shaft and a magnet ring, it is characterised in that
Described magnet ring comprises several magnet ring unit, and several magnet ring unit described are sleeved on outside described rotating shaft by an axial-rotation angle respectively, to form the described magnet ring of described rotor structure.
Preferably, in above-mentioned rotor structure, in several magnet ring unit described, each magnet ring unit comprises the magnetic pole logarithm that quantity is identical; And
Along the axis direction of described rotating shaft, the magnetic pole that the magnetic pole that arbitrary described magnet ring unit comprises comprises with magnet ring unit other described aligns one by one.
Preferably, in above-mentioned rotor structure, described axial-rotation angle is:
θ=360 °/(C*N);
Wherein, θ is described axial-rotation angle, and C is the least common multiple of number of magnetic poles and magnetic pole groove number, and N is the number of several magnet ring unit described.
Preferably, in above-mentioned rotor structure, described number of magnetic poles is the magnetic pole logarithm that each described magnet ring unit comprises, and described magnetic pole groove number is the number of stator slots of described servomotor.
Preferably, in above-mentioned rotor structure, the magnetic pole logarithm that each described magnet ring unit comprises range for 2～24 pairs.
Preferably, in above-mentioned rotor structure, all described magnetic poles are all radial oriented in pole anisotropy.
Preferably, in above-mentioned rotor structure, the material of described magnet ring is sintered NdFeB.
Preferably, above-mentioned rotor structure also includes iron core, and described rotating shaft is through iron core and tightens together with iron core, and several magnet ring unit described are sleeved on outside described iron core.
Preferably, in above-mentioned rotor structure, between described magnet ring and described rotating shaft, it is filled with bonding agent.
Preferably, in above-mentioned rotor structure, described magnet ring comprises the first magnet ring unit, the second magnet ring unit and the 3rd magnet ring unit;
Wherein, described second magnet ring unit is sleeved on and is undertaken in the described rotating shaft being set with described first magnet ring unit of first time rotation by described axial-rotation angle, and described 3rd magnet ring unit is sleeved on and is undertaken in the homodromal described rotating shaft being set with described second magnet ring unit and described first magnet ring unit of second time by described axial-rotation angle; Described first magnet ring unit, the second magnet ring unit and the 3rd magnet ring unit connect the described magnet ring forming described rotor structure.
Technique scheme has the advantage that or beneficial effect: the segmented multipole magnet ring rotor structure of servomotor provided by the invention, solve the oblique pole of anisotropy sintered NdFeB, pole to magnetize the problem that difficulty is big, manufacturing cost is high, by the method, magnet ring can be simplified to and directly magnetize, and single magnet ring length can be the 1/3 of original length, compensate for the defect of single magnet ring processing technique length limitation, conveniently design elongated motor. Reduce the fraction defective of assembling process simultaneously, during assembling, utilize the specific angle of rotation to reach the effect of skewed slot. Magnet ring is closely connected with rotating shaft and bonding by bonding agent between the two. This pole anisotropy sintered NdFeB multi-pole magnet-ring rotor structure improves the yields in magnet ring manufacture process, thus reducing the waste of rare earth material, fundamentally also reduces cost.
Accompanying drawing explanation
By reading detailed description non-limiting example made with reference to the following drawings, the present invention and feature, profile and advantage will become more apparent. The part that labelling instruction identical in whole accompanying drawings is identical. Can not be drawn to scale accompanying drawing, it is preferred that emphasis is the purport of the present invention is shown.
Fig. 1 is the rotor structure schematic diagram of the servomotor of the present invention;
Fig. 2 is the field structure schematic diagram of embodiment of the present invention middle magnetic ring.
Detailed description of the invention
Below in conjunction with specific embodiment, the rotor structure of the present invention is elaborated.
The rotor mechanism of the servomotor of the present invention, utilizes some sections of tubular pole anisotropy sintered NdFeB multi-pole magnet-rings to be set in outside rotating shaft so that assembling process of products is simple, production cost is low, reliability is high, performance is good. And breach the restriction of original rotor length, it is possible to design elongated servomotor.
With reference to Fig. 1, the rotor structure in the present embodiment includes rotating shaft 1 and some sections of barrel-shaped magnet rings (being preferably three sections of barrel-shaped magnet rings, i.e. magnet ring 2, magnet ring 3 and magnet ring 4 in the present embodiment). Wherein, rotating shaft is solid spindle structure, and rotor structure also includes iron core, but in actual production technique, generally iron core and rotating shaft is integrated, is a part for rotating shaft by core design, is used for and magnet ring close fit. Rotating shaft and rotor core are made of one, it is possible to save production stage. Therefore in the present invention, no longer iron core is individually marked and tell about.In the present embodiment, the canned paragraph 11 that a section is rotating shaft 1 that rotating shaft 1 contacts with each magnet ring, this canned paragraph 11 length is equal to the sum of each section of magnet ring height, and each section of magnet ring is set on canned paragraph 11 by certain axial-rotation angle.
As a preferred embodiment, magnet ring 2, magnet ring 3, magnet ring 4 adopt NdFeB material to make, and each magnet ring includes more than one pair of magnetic pole, for instance can being designed to comprise 2 pairs to 24 pairs magnetic poles by magnet ring according to design requirement, the structural representation of its magnetic pole is as shown in Figure 2.
With reference to Fig. 2, in the present embodiment, for 4 pairs of pole magnetic poles, the field structure of invention is specifically described, it is radial oriented that the magnetic pole of the present invention is pole anisotropy, also in the form of a ring, namely magnet ring 2,3,4 is the pole anisotropy sintering magnetic Nd-Fe-B ring of the tubular including more than a pair magnetic pole to magnet ring 2,3,4 overall structure.
As a preferred embodiment, in this enforcement, magnet ring 2,3,4 need not design oblique polar angle, optimizes technological process. The assembling process of its middle magnetic ring 2,3,4 and rotating shaft 1 particularly as follows:
If θskBe 360 ° divided by number of magnetic poles (namely the number of magnetic pole, the number of magnetic poles such as, comprised in Fig. 2 is 8) and magnetic pole groove number (the i.e. number of stator slots of servomotor, the present invention lays particular emphasis on novel rotor structure, therefore herein no longer to stator launch narration) least common multiple, ensure that the magnetic pole of each magnet ring (magnet ring 2, magnet ring 3, magnet ring 4) aligns along the axis direction of rotating shaft 1, magnet ring 2 is overlapped the outer rear flank loading rotating shaft canned paragraph 11, rotating shaft 1 is rotated θskAfter the angle of/3, magnet ring 3 overlapped outside loading rotating shaft canned paragraph 11 and be in close contact with magnet ring 2, then continuing rotating shaft 1 in the same direction to rotate θskAfter the angle of/3, magnet ring 4 is overlapped the outside loading rotating shaft canned paragraph 11 and contacts with magnet ring 3.
Concrete, for instance adopting the motor of 8 magnetic poles and 12 magnetic pole grooves, first alignd at axis direction magnetic pole by magnet ring 2,3,4, the least common multiple due to 8 and 12 is 24, then θsk=360 °/24=15 °. Magnet ring 2 set loads the outside of rotating shaft canned paragraph 11, after rotating shaft 1 is rotated 5 °, magnet ring 3 is overlapped the outside loading rotating shaft canned paragraph 11 to be in close contact with magnet ring 2, after again rotating shaft 1 being continued rotation 5 ° in the same direction, magnet ring 4 is overlapped the outside loading rotating shaft canned paragraph 11 contact with magnet ring 3, to complete the assembling of each section of magnet ring.
As a preferred embodiment, it is filled with bonding agent between each section of magnet ring and the outside of rotating shaft canned paragraph 11, ensures mechanical strength and reliability, from without adding extra protection device.
As it is preferred that embodiment, each magnet ring can according to the different magnetic pole logarithm of different design requirement designs, magnet ring thickness and magnet ring height etc.
In sum, the invention provides the rotor structure of a kind of servomotor, its magnet ring adopts pole anisotropy sintered NdFeB multi-pole magnet-ring, it is possible to as requested flexible design length, thickness, and the number of pole-pairs that magnetizes of magnet ring. Stagewise magnet ring need not consider oblique polar angle, overcomes the restriction of single hop magnet ring height, such that it is able to design the elongated motor of special occasions. Pole anisotropy sintered NdFeB multi-pole magnet-ring surface magnetic flux density radiates ring multi-pole magnet-ring far above same size sintered NdFeB, this takes full advantage of the magnetic property of permanent magnet, thus improving the performance of servomotor and the volume of motor can being reduced, motor is allowed to meet more operating mode.
It should be appreciated by those skilled in the art that those skilled in the art are realizing described change case in conjunction with prior art and above-described embodiment, do not repeat at this. Such change case has no effect on the flesh and blood of the present invention, does not repeat them here.
Above presently preferred embodiments of the present invention is described.It is to be appreciated that the invention is not limited in above-mentioned particular implementation, the equipment and the structure that are not wherein described in detail to the greatest extent are construed as and are practiced with the common mode in this area; Any those of ordinary skill in the art, without departing under technical solution of the present invention ambit, all may utilize the method for the disclosure above and technology contents and technical solution of the present invention is made many possible variations and modification, or it being revised as the Equivalent embodiments of equivalent variations, this has no effect on the flesh and blood of the present invention. Therefore, every content without departing from technical solution of the present invention, the technical spirit of the foundation present invention, to any simple modification made for any of the above embodiments, equivalent variations and modification, all still falls within the scope of technical solution of the present invention protection.
Claims (10)
1. a rotor structure for servomotor, including a rotating shaft and a magnet ring, it is characterised in that
Described magnet ring comprises several magnet ring unit, and several magnet ring unit described are sleeved on outside described rotating shaft by an axial-rotation angle respectively, to form the described magnet ring of described rotor structure.
2. rotor structure as claimed in claim 1, it is characterised in that in several magnet ring unit described, each magnet ring unit comprises the magnetic pole logarithm that quantity is identical; And
Along the axis direction of described rotating shaft, the magnetic pole that the magnetic pole that arbitrary described magnet ring unit comprises comprises with magnet ring unit other described aligns one by one.
3. rotor structure as claimed in claim 2, it is characterised in that described axial-rotation angle is:
θ=360 °/(C*N);
Wherein, θ is described axial-rotation angle, and C is the least common multiple of number of magnetic poles and magnetic pole groove number, and N is the number of several magnet ring unit described.
4. rotor structure as claimed in claim 3, it is characterised in that described number of magnetic poles is the magnetic pole logarithm that each described magnet ring unit comprises, and described magnetic pole groove number is the number of stator slots of described servomotor.
5. rotor structure as claimed in claim 2, it is characterised in that the magnetic pole logarithm that each described magnet ring unit comprises range for 2～24 pairs.
6. the rotor structure as described in claim 2～5, it is characterised in that all described magnetic poles are all radial oriented in pole anisotropy.
7. rotor structure as claimed in claim 1, it is characterised in that the material of described magnet ring is sintered NdFeB.
8. rotor structure as claimed in claim 1, it is characterised in that also including iron core, described rotating shaft is through iron core and tightens together with iron core, and several magnet ring unit described are sleeved on outside described iron core.
9. rotor structure as claimed in claim 1, it is characterised in that be filled with bonding agent between described magnet ring and described rotating shaft.
10. rotor structure as claimed in claim 1, it is characterised in that described magnet ring comprises the first magnet ring unit, the second magnet ring unit and the 3rd magnet ring unit;
Wherein, described second magnet ring unit is sleeved on and is undertaken in the described rotating shaft being set with described first magnet ring unit of first time rotation by described axial-rotation angle, and described 3rd magnet ring unit is sleeved on and is undertaken in the homodromal described rotating shaft being set with described second magnet ring unit and described first magnet ring unit of second time by described axial-rotation angle; Described first magnet ring unit, the second magnet ring unit and the 3rd magnet ring unit connect the described magnet ring forming described rotor structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610228538.7A CN105680593A (en) | 2016-04-13 | 2016-04-13 | Rotor structure of servo motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610228538.7A CN105680593A (en) | 2016-04-13 | 2016-04-13 | Rotor structure of servo motor |
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| Publication Number | Publication Date |
|---|---|
| CN105680593A true CN105680593A (en) | 2016-06-15 |
Family
ID=56309738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610228538.7A Pending CN105680593A (en) | 2016-04-13 | 2016-04-13 | Rotor structure of servo motor |
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| Country | Link |
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| CN (1) | CN105680593A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111524681A (en) * | 2020-03-29 | 2020-08-11 | 至玥腾风科技集团有限公司 | Magnetizing method of permanent magnet and manufacturing method of high-speed rotor |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4633109A (en) * | 1984-10-23 | 1986-12-30 | Standard Elektrik Lorenz Aktiengesellschaft | Electronically commutated, collectorless direct-current motor |
| US6144132A (en) * | 1998-08-03 | 2000-11-07 | Okuma Corporation | Permanent magnet motor |
| CN1384582A (en) * | 2001-05-04 | 2002-12-11 | 因温特奥股份公司 | Permanent magnetic motor |
| KR20070059306A (en) * | 2005-12-06 | 2007-06-12 | 주식회사 에어젠 | A high speed motor with embedded permanent magnets |
| CN201499038U (en) * | 2009-09-18 | 2010-06-02 | 钱存善 | Multi-section oblique-pole rotor type permanent magnetic wind driven generator |
| CN102005883A (en) * | 2010-11-15 | 2011-04-06 | 江门市瑞荣泵业有限公司 | Self-control permanent magnet synchronous motor of well submersible pump |
| CN102545424A (en) * | 2010-12-30 | 2012-07-04 | 深圳市英威腾电气股份有限公司 | Rotor structure of alternating current servo motor |
| CN205681194U (en) * | 2016-04-13 | 2016-11-09 | 上海信耀电子有限公司 | A kind of rotor structure of servomotor |
-
2016
- 2016-04-13 CN CN201610228538.7A patent/CN105680593A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4633109A (en) * | 1984-10-23 | 1986-12-30 | Standard Elektrik Lorenz Aktiengesellschaft | Electronically commutated, collectorless direct-current motor |
| US6144132A (en) * | 1998-08-03 | 2000-11-07 | Okuma Corporation | Permanent magnet motor |
| CN1384582A (en) * | 2001-05-04 | 2002-12-11 | 因温特奥股份公司 | Permanent magnetic motor |
| KR20070059306A (en) * | 2005-12-06 | 2007-06-12 | 주식회사 에어젠 | A high speed motor with embedded permanent magnets |
| CN201499038U (en) * | 2009-09-18 | 2010-06-02 | 钱存善 | Multi-section oblique-pole rotor type permanent magnetic wind driven generator |
| CN102005883A (en) * | 2010-11-15 | 2011-04-06 | 江门市瑞荣泵业有限公司 | Self-control permanent magnet synchronous motor of well submersible pump |
| CN102545424A (en) * | 2010-12-30 | 2012-07-04 | 深圳市英威腾电气股份有限公司 | Rotor structure of alternating current servo motor |
| CN205681194U (en) * | 2016-04-13 | 2016-11-09 | 上海信耀电子有限公司 | A kind of rotor structure of servomotor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111524681A (en) * | 2020-03-29 | 2020-08-11 | 至玥腾风科技集团有限公司 | Magnetizing method of permanent magnet and manufacturing method of high-speed rotor |
| CN111524681B (en) * | 2020-03-29 | 2021-07-27 | 靳普 | Magnetizing method of permanent magnet and manufacturing method of high-speed rotor |
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Application publication date: 20160615 |