CN103986303A - Slotless permanent magnet linear synchronous motor and manufacturing method of slotless permanent magnet linear synchronous motor - Google Patents

Abstract

The invention discloses a slotless permanent magnet linear synchronous motor and a manufacturing method of the slotless permanent magnet linear synchronous motor. The slotless permanent magnet linear synchronous motor comprises a movable part, an air gap and a fixed part. The movable part is formed by a primary yoke and windings, wherein the windings are bundled up through glass tape, then fixed to the primary yoke through organosilicon glass paint cloth, and then packaged and fixed to the primary yoke through epoxy resin. The fixed part comprises a permanent magnet and a secondary yoke, wherein the permanent magnet is fixed to the secondary yoke through epoxy resin. According to the slotless permanent magnet linear synchronous motor and the manufacturing method, an analytical model of the motor is built based on the theory of the slotless permanent magnet linear synchronous motor, and the reasonability of the design method and the reasonability of model building can be known through analysis of electromagnetic parameters and structure parameters according to the design thought; it is verified that the slotless permanent magnet linear synchronous motor has the advantages of being free of primary slotting, simple in winding inlaying, high in slot fullness rate, low in temperature coefficient, free of magnetic resistance, small in thrust pulsation, low in noise, high in control accuracy and simple in manufacture process, reducing end windings and the like.

Description

A kind of Slotless Permanent Magnet Linear Synchronous Motor and manufacture method thereof

Technical field

The invention belongs to mechanical & electrical technology field, relate to a kind of Slotless Permanent Magnet Linear Synchronous Motor, relate in particular to a kind of Slotless Permanent Magnet Linear Synchronous Motor and manufacture method thereof.

Background technology

Slotless Permanent Magnet Linear Synchronous Motor has permanent magnet linear synchronous motor and slotless electric machines two-fold advantage concurrently.From searching document, say, domesticly substantially do not carry out, external research work mainly concentrates on part and improves the aspects such as design (as improved power density etc.), Electromagnetic Calculation (two-dimensional finite meta analysis, the humorous property of three dimensions function).Make a general survey of research both domestic and external, for the research of Slotless Permanent Magnet Linear Synchronous Motor few, a few countries such as Jin You Korea S, the U.S. is studied this in the world.Achievement in research is limited, it is experimental thing, as X-Y structure gantry, the Korea S electrician of Seoul, South Korea university development study Slotless Permanent Magnet Linear Synchronous Motor, the California, USA SantaClarita that Korea S Chungnam university is in one's power applied to production servo system, the Baldor Slotless Permanent Magnet Linear Synchronous Motor of Baldor electronics corporation etc.These are all that to have the research of groove permanent magnet linear synchronous motor be basis.

Permanent magnet linear synchronous motor, as the new technology with new principle, new theory occurring in the second half in 20th century electrical field, has evoked domestic and international researcher and the industrial producer great interest to this research, and has obtained certain achievement in research.From space angle, there is dividing of Vertical Elevating System for Permanent Magnet Linear Synchronous Motor, horizontal transportation system.Aspect research vertical transit system: mainly contain Japan, Russia, South Africa, Germany, China etc.The research emphasis of Japan is placed on skyscraper elevator aspect, and test model is principle substantially, and the tens of pieces of performance study papers of delivering, are all the experiment conclusion based on principle; Russia's research emphasis is the mine hoisting system that linear electric motors drive, this is a research direction that has very much development potentiality, and up to the present, the paper of publishing almost end is seen, patent retrieval also only finds that there is several mechanical parts and applies for a patent, and is difficult to infer its research and application level; South Africa is also similarly studied, and the people such as RupertJ.Cruise, LandyC.F. of University of Witwatersrand (The University of the Witwatersrand) are at the article of delivering for 1994 to 2000 aspect the lifting of several pieces of linear electric motors deep-wells; The people such as Germany M.Platen also carry out PMLSM vertical-lift aspect research, mainly concentrate on the aspects such as Finite Element Numerical Simulation, the analysis of limit end effect, force oscillation analysis, Optimized System Design; Within 1993, linear electric motors research institute of Institutes Of Technology Of He'nan (former Jiaozuo Institute of Technology) starts the research work for the wireless elevator system of permanent-magnetism linear motor, it is domestic unique this case study unit that carries out, be subject to subsidy and the support of country, province portion Natural Science Fund In The Light, great tackling key problem and Henan Province's key discipline fund, complete research project ten remainders such as " linear synchronous generator elevator system is theoretical to be studied with control ".Develop voluntarily the novel wireless lifting experimental system that the high permanent magnet linear synchronous motor of 10m drives, its result operational excellence, fully shows the novel and unique of this system.The research of the relevant this respect of linear electric motors research institute of Institutes Of Technology Of He'nan is at present in prostatitis both domestic and external, and theoretical and experimental study is all obtained many important breakthroughs, as: the permanent-magnetism linear motor of founding different and traditional analysis is unified linear theory system; Found (one dimension, two dimension, three-dimensional) whole analytic theory of permanent-magnetism linear motor; The wireless lifting experimental system (device) that in founder, the permanent-magnetism linear motor of outside platform load 1.5T drives.Realize " five without " Lifting scheme: without steel wire rope, without counterweight, without derrick, without intermediate transmission, limit without hoisting depth.Aspect horizontal, external as Japan develops superconduct (EDS) magnetic suspension train, Germany often leads type (EMS) magnetic suspension train etc.; Domestic as voluntarily development be different from the MAS-3 type magnetic suspension train of Japan, Germany, by experts, be called " atypical magnetic floating ", its performance is poor unlike Japan, Germany, they low of its cost ratio; Linear electric motors research institute of Institutes Of Technology Of He'nan success development of new horizontal transport experimental rig, can be widely used between dumper, the field of industrial production such as production line; The research unit of linear electric motors also has the electrician of Chinese Academy of Sciences institute, Xi'an Communications University, Zhejiang University, Institutes Of Technology Of Taiyuan, Shenyang University of Technology, Shanghai University, Tsing-Hua University, China Mining University etc. at home.

Permanent magnet linear synchronous motor, slotless permanent magnet motor still adopt traditional method for designing, for the analysis of teeth groove, consider the impacts such as effect, the shape that also will consider teeth groove, distribution and the depth of teeth groove, analyze more complicated, it is thorough to be difficult for considering, so Erecting and improving model is more difficult; Simultaneously electromagnetic push be subject to teeth groove to affect fluctuation ratio larger, the vibration noise therefore producing is also larger, in addition, structure is manufactured cumbersome, is difficult for cooling etc.And remove for the design of the Slotless Permanent Magnet Linear Synchronous Motor of design herein, use conventional methods on basis, for permanent magnet, armature winding adopts Method of Equivalent Currents to analyze current density, it is more objective, approach actual analysis, need not consider the impact of teeth groove, because the magnetic permeability of tooth compares air, much larger times of the magnetic permeability of armature winding, substantially can be by air, the magnetic permeability of armature winding is ignored, bring very large aspect to like this analysis and design structure, owing to there is no the impact of teeth groove, so electromagnetic push fluctuation diminishes, thrust is smoother, be applicable to the occasion that control precision is high, armature winding adopts to concentrate and distributes, and does not overlap mutually, many models, consists of, and one model is comprised of 4 utmost point 3 windings.

The shortcoming of prior art is that the design for permanent magnet linear synchronous motor, slotless permanent magnet motor still uses conventional methods, and such electric machine structure is complicated, vibration noise is larger, electromagnetic push fluctuation ratio is larger.Slotless Permanent Magnet Linear Synchronous Motor has the feature of slotless permanent magnet motor and permanent magnet linear synchronous motor concurrently.Slotless Permanent Magnet Linear Synchronous Motor have elementary without fluting, winding embeds simply, copper factor is high, temperature coefficient is low, end winding reduces, without magnetic resistance resistance (elementary teeth groove and permanent magnet interaction power), thrust little, the feature such as noise is low, magnetic saturation is lower, control precision is high and manufacturing process is simple of pulsing; But it also has the shortcoming that power density is low.Design for this motor is mainly the advantage based on Slotless Permanent Magnet Linear Synchronous Motor, and it is applicable to being applied to the occasion that control precision is high.

Summary of the invention

In order to overcome the defect existing in prior art, the invention provides a kind of Slotless Permanent Magnet Linear Synchronous Motor and manufacture method thereof, this motor have elementary without fluting, winding embeds simply and (with epoxy resin, casts), copper factor is high, temperature coefficient is low, without magnetic resistance resistance (elementary teeth groove and permanent magnet interaction power), thrust little, the feature such as control precision is high and technique is simple of pulsing.This class motor is applicable to high accuracy and the high occasion of control precision.Its technical scheme is as follows:

A kind of Slotless Permanent Magnet Linear Synchronous Motor, comprise mover, air gap and stationary part, described mover consists of elementary yoke and winding, winding stops up by glass tape, then winding is fixed on elementary yoke by organosilicon glass paint cloth, then by also fixed thereon of epoxy encapsulation; Permanent magnet and secondary yoke are stationary part, and permanent magnet is fixed on secondary yoke with epoxy resin.

Further preferably, the copper conductor that described winding adopts is polyester enamelled wire, and class of insulation B, plain conductor wire diameter are that 1.00 ± 0.15mm, enamelled wire wire diameter are 1.07mm, every phase 150 circles, every groove 50 circles, actual wire sectional area 0.785mm ², actual wire current density 4.77465A/mm ², wire area occupied is 57.245mm ², copper factor is 76.736%; Glass tape adopts alkali-free glass wool, and alkali-free glass wool thickness 0.1mm, width are that 10mm, model are 0.1 * 10mm; Between winding, do not overlap mutually, winding is concentrated winding, individual layer, and organosilicon glass paint cloth specification is: 0.1mm * 1000mm.

Further preferably, permanent magnet material adopts neodymium iron boron NTP-264H, its major parameter B _{r20 °}=1.15T, B _{r75 °}=1.0741T, H _{r20 °}=875KA/m, H _{r75 °}=817.25KA/m, working temperature is 75 ℃, permanent magnet longitudinal length 14mm, permanent magnet transverse width 90mm, permanent magnet magnetization height 7mm, is shaped as the cuboid of rectangle.

Further preferably, elementary yoke and secondary conjugated material are selected cast steel, and the thickness of elementary yoke is 6mm, and the thickness of secondary yoke is 5mm, the cuboid that is shaped as rectangle of elementary yoke and secondary yoke.

A manufacture method for Slotless Permanent Magnet Linear Synchronous Motor, comprises the following steps:

(1) according to the requirement of design, the major parameter of determining this motor is starting thrust, the number of phases and connection, rated frequency, synchronizing speed and rated current etc., carrying out electric machine structure parameter designing, electromagnetic parameter and performance parameter calculates, and performance parameter is checked, finally determine motor size and material;

(2) the elementary manufacture of motor.1. elementary yoke machine-shaping; 2. according to the design armature winding number of turn, be wound around and tie up with glass tape, then armature winding is fixed on elementary yoke with organosilicon glass paint cloth, with epoxy resin after melting, armature winding is being fixed on elementary yoke; 3. elementary mounting bracket and skidding.

(3) the secondary manufacture of motor.1. secondary yoke machine-shaping; 2. permanent magnet machine-shaping magnetizing; 3. permanent magnet is fixed on secondary yoke with epoxy resin.

(4) assembling of motor.Between motor elementary and secondary, effective air gap is 2mm, if can not meet, adjusting pole and pulley, until meet the demands.

(5) motor debugging.

Beneficial effect of the present invention is:

Compared with prior art, the present invention is based on the theory of Slotless Permanent Magnet Linear Synchronous Motor, set up the analytic modell analytical model of this motor, according to the design's thinking, by the analysis of electromagnetic parameter and structural parameters, in can understand the reasonability that adopts the design's method and model to set up.Checking Slotless Permanent Magnet Linear Synchronous Motor elementary without fluting, winding embeds simply, copper factor is high, temperature coefficient is low, end winding reduces, without magnetic resistance resistance (elementary teeth groove and permanent magnet interaction power), thrust little, the feature such as noise is low, control precision is high and manufacturing process is simple of pulsing.

Accompanying drawing explanation

Fig. 1 is the structure chart of Slotless Permanent Magnet Linear Synchronous Motor; Wherein: the front view that Fig. 1 (a) is Slotless Permanent Magnet Linear Synchronous Motor; The vertical view that Fig. 1 (b) is Slotless Permanent Magnet Linear Synchronous Motor, the left view that Fig. 1 (c) is Slotless Permanent Magnet Linear Synchronous Motor; The winding construction figure that Fig. 1 (d) is Slotless Permanent Magnet Linear Synchronous Motor, wherein figure Chinese word annotation: τ-polar moment; L _m-permanent magnet longitudinal length; L ₁-first level length; h _j1-secondary yoke is high; h _j2-elementary yoke is high; a ₁the magnetization height of-permanent magnet; a-a ₁-air gap; The height of h-Slotless Permanent Magnet Linear Synchronous Motor; b ₁the width of-winding; The distance of γ-β-winding two effective edges; β-b ₁-winding is apart from the distance of end; b _m-permanent magnet lateral length; L ₂the transverse width of-Slotless Permanent Magnet Linear Synchronous Motor; The inside radius of R-winding;

Fig. 2 is the process chart of Slotless Permanent Magnet Linear Synchronous Motor manufacture method;

Fig. 3 be Slotless Permanent Magnet Linear Synchronous Motor with the structure chart of support and pulley, wherein, the front view that Fig. 3 (a) is Slotless Permanent Magnet Linear Synchronous Motor; The left view that Fig. 3 (b) is Slotless Permanent Magnet Linear Synchronous Motor, the vertical view that Fig. 3 (c) is Slotless Permanent Magnet Linear Synchronous Motor;

Fig. 4 is the nucleus correcting program flow chart of Slotless Permanent Magnet Linear Synchronous Motor;

Fig. 5 is armature winding equivalent current density;

Fig. 6 is that the magnetic potential of permanent magnet distributes;

Fig. 7 is six layers of linear model of Slotless Permanent Magnet Linear Synchronous Motor, Fig. 7 (a) permanent magnet independent role wherein, Fig. 7 (b) armature winding independent role;

Fig. 8 is structural model;

Fig. 9 is design;

Figure 10 is single side type Slotless Permanent Magnet Linear Synchronous Motor (short elementary length is secondary), wherein, and 1-elementary yoke 2-armature winding (motion parts) 3-permanent magnet (stationary part) 4-secondary yoke;

Figure 11 single side type Slotless Permanent Magnet Linear Synchronous Motor (long elementary short secondary), wherein, 1-elementary yoke 2-armature winding (stationary part) 3-permanent magnet (motion parts) 4-secondary yoke;

Figure 12 is Electromagnetic Design;

Figure 13 is two-dimentional air gap Distribution of Magnetic Field (y=8mm);

Figure 14 is three-dimensional x direction air-gap field distribution (y=8mm);

Figure 15 is three-dimensional y direction air-gap field distribution (y=8mm);

Figure 16 is static electromagnetic thrust;

Figure 17 is two kinds of mode magnetic resistance resistances make comparisons (Slotless Permanent Magnet Linear Synchronous Motor magnetic resistance resistances);

Figure 18 is two kinds of motor magnetic resistance resistances make comparisons (slotlesses and have groove permanent magnet linear synchronous motor);

Figure 19 is electromagnetic push (speed drive);

Figure 20 is electromagnetic push (load driving);

Figure 21 is electromagnetic push (transient analysis);

Figure 22 is that permanent magnet independent role air gap flux density is with air gap change curve (y=8mm);

Figure 23 is that armature winding independent role air gap flux density is with air gap change curve (y=8mm);

Figure 24 is the relation curve of permanent magnet longitudinal length and thrust;

Figure 25 is the relation curve of permanent magnet height and thrust;

Figure 26 is the relation curve of air gap and thrust;

Figure 27 is that electromagnetic push is with permanent magnet transverse width curve.

Embodiment

Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described in more detail.

A kind of Slotless Permanent Magnet Linear Synchronous Motor, comprise mover, air gap and stationary part, described mover consists of elementary yoke and winding, winding stops up by glass tape, then winding is fixed on elementary yoke by organosilicon glass paint cloth, then by also fixed thereon of epoxy encapsulation; Permanent magnet and secondary yoke are stationary part, and permanent magnet is fixed on secondary yoke with epoxy resin.τ=15mm in figure; L _m=14mm; L ₁=180mm; h _j1=5mm; h _j2=6mm; a ₁=7mm; A=9mm; H=30mm; b ₁=8mm; γ=11mm; β=9mm.

Further preferably, the winding of Slotless Permanent Magnet Linear Synchronous Motor stops up with glass tape, the copper conductor that winding adopts is polyester enamelled wire, and class of insulation B, plain conductor wire diameter are that 1.00 ± 0.15mm, enamelled wire wire diameter are 1.07mm, every phase 150 circles, every groove 50 circles, actual wire sectional area 0.785mm ², actual wire current density 4.77465A/mm ², wire area occupied is 57.245mm ², copper factor is 76.736%; Glass tape adopts alkali-free glass wool, and alkali-free glass wool thickness 0.1mm, width are that 10mm, model are 0.1 * 10mm; Between winding, do not overlap mutually, winding is for concentrating winding, individual layer, then with organosilicon glass paint cloth, winding is fixed on primary plate, organosilicon glass paint cloth specification is that 0.1mm * 1000mm, then by also fixed thereon of epoxy encapsulation, permanent magnet material adopts neodymium iron boron NTP-264H, its major parameter B _{r20 °}=1.15T, B _{r75 °}=1.0741T, H _{r20 °}=875KA/m, H _{r75 °}=817.25KA/m, working temperature is 75 ℃, permanent magnet longitudinal length 14mm, permanent magnet transverse width 90mm, permanent magnet magnetization height 7mm, is shaped as the cuboid of rectangle.Elementary yoke and secondary conjugated material are selected cast steel, and thickness is 6mm and 5mm respectively, is shaped as the cuboid of rectangle.

The manufacture method of Slotless Permanent Magnet Linear Synchronous Motor, comprises the following steps:

1) Slotless Permanent Magnet Linear Synchronous Motor that the present invention manufactures and designs is that the short elementary length of pancake is secondary:

1. first according to the demand of design, determine major parameter starting thrust, the number of phases and connection, rated frequency, synchronizing speed and rated current etc., carry out design of electrical motor.It is that to adopt star connection, rated frequency be that 6 hertz, synchronizing speed are 0.18m/s and rated current 3.75A for 30N, 3 phases, winding that parameter is respectively starting thrust.2. according to definite parameter, carry out design of electrical motor, design of electrical motor mainly comprises structural design and Electromagnetic Design.First the structural design of motor determines that general structure is the secondary Slotless Permanent Magnet Linear Synchronous Motor of the short elementary length of pancake; Then carry out the selection of primary and secondary yoke magnetic material, according to the analysis of the magnetic material electromagnetic push to different, analyze as table 1.From analytical table, can find out, as long as the magnetic permeability of permeability magnetic material is not less than

The thrust of table 1 different materials

100 (μ _r>=100), the electromagnetic push worst error of different materials is less than 1%.Elementary yoke, secondary conjugated material are selected cast steel.The Electromagnetic Design of motor, first be the selection of permanent magnetic material, according to the characteristic of permanent magnetic material, development, application prospect and in conjunction with the feature of this motor, this motor adopts Nd-Fe-Bo permanent magnet material, for considering processing cost and not affecting in the situation of exerting oneself, adopt rectangle permanent magnet; Then be that magnet size is determined, from the magnetic potential balance relation of motor, pre-estimation initial value, then calculate and adjust according to concrete electromagnetic performance; Therefore the size of permanent magnet magnetization direction length has determined the anti-degaussing ability of motor, also will reflect that degaussing situation checks calculatings according to armature, and finally whether definite permanent magnet magnetization direction length selection is suitable; The primary election of permanent magnet longitudinal length, by 5 τ/6, is checked in calculating and is regulated permanent magnet magnetic flux area at Operating Point of Permanent Magnet, selects suitable permanent magnet longitudinal length; For the transverse width of permanent magnet in order to improve transverse edge effect, the transverse width of general permanent magnet is longer than elementary transverse width, but because the price of rare earth permanent-magnetic material is more expensive, do not affecting under service behaviour requirement, for reducing costs, the transverse width of generally getting permanent magnet equals elementary transverse width; Then primary and secondary yoke is high to be determined carrying out, and span is respectively 1.2-1.6T, 1.5-1.8T; Finally carry out armature winding design, according to designing requirement, select suitable winding size, under the condition that guarantees to allow, maximum is utilized material property; In addition also have an important parameter to determine, be exactly the air gap of motor, owing to considering this motor slotless, the magnetic permeability of winding is 1, identical with the magnetic permeability of air, leakage field is many, and air gap again can not be too large, otherwise exerting oneself of Slotless Permanent Magnet Linear Synchronous Motor is less, there is the installation of considering this motor, if too little being not easy to of air gap installed, comprehensive many-sided factor, the working gas gap of selecting this Slotless Permanent Magnet Linear Synchronous Motor is 2mm.3. after the structural parameters of Slotless Permanent Magnet Linear Synchronous Motor are determined, carry out performance parameter calculating, calculation procedure, as Fig. 4, if result of calculation can not meet design requirement, need be adjusted structural parameters and accounting repeatedly, until meet the demands.Meet design requirement, Slotless Permanent Magnet Linear Synchronous Motor design parameter and performance parameter are as follows:

(1) electric machine structure parameter

Table 2 electric machine structure parameter

(2) major parameter is determined

1. starting thrust: 30N;

2. the number of phases: 3;

3. connection: Y

4. rated frequency: 6HZ;

5. synchronizing speed: v _s=0.18m/s;

6. rated current: 3.75A.

(3) calculation of parameter

1. permanent magnet

B _r20°＝1.15T B _r75°＝1.0741T H _r20°＝875KA/m H _r75°＝817.25KA/m

Permanent magnet longitudinal length: 14mm; Permanent magnet transverse width: 90mm; Permanent magnet magnetization height: 7mm; Permanent magnet working temperature: 75 ℃; Shape: rectangle.

2. primary and secondary key dimension

Key dimension ratio: λ=1.5; Number of pole-pairs: 6; Every utmost point net sectional area: 1260mm ²; Electric loading: A=187.5A/cm; Current density: J=5A/mm ²; The interfacial area of every circle coil: S=0.75mm ²; Every sectional area: S ₁=0.9772mm ²; Choose wire: polyester enamelled wire, class of insulation B; Choose plain conductor: d _i=1.00 ± 0.15mm; Enamelled wire wire diameter: d=1.07mm; Every phase: N=150; Every groove: N _s=50; Actual wire sectional area: actual wire current density: J=4.77465A/mm ²; Wire area occupied: S _d=57.245mm ²; Groove effective area: S _e=74.6mm ²; Copper factor: S _f=76.736%; Slot liner area: S _i=5.4mm ²; Insulating material: organosilicon glass paint cloth: specification 0.1mm * 1000mm (long 1000mm, wide 0.15mm); Glass tape: alkali-free glass wool, thickness 0.1mm, width are that 10mm, model are 0.1 * 10; Working gas gap: 2mm; Primary and secondary yoke cast steel: model: ZG200-400, elementary yoke is high: 6mm, width 90mm, length 180mm, secondary yoke are high: 5mm, width 90mm; Epoxy resin: model: 600L; Mixed proportion: one-component; Curing time: 120 ℃ * 1 hour.

Support adopts stainless steel: model: 304#, length 2mm, thickness 1.2mm, height 19mm, totally 4; 4, plastic nylon pulley, specification: 4 * 16 * 6mm

(4) electromagnetic parameter

The unloaded air-gap flux of permanent magnet: φ=6.729321518 * 10 ^-4wb

Electromagnetic push: 29.234772N

Electromagnetic power: P _m=29.234772 * 0.18=5.2627896W

Overload magnification: λ=1.7644

Armature winding half turn length: l _av=90+9.42=99.42mm

Every phase resistance:

The reactance of armature reaction: X _s=0.011528144107 Ω

Groove leakage reactance: X _l1=0.00271049707 Ω

End leakage reactance: X _l2=0.000042733 Ω

Synchronous reactance: X _t=0.0170405 Ω

Efficiency: η=13.15%

Analytic method: self-induction: 1.131mH mutual inductance :-0.19695mH

ANSYS: self-induction: 1.227mH mutual inductance :-0.174mH

MAGNET: self-induction: 1.417mH mutual inductance :-0.19695mH

2) according to above-mentioned design motor size, manufacture motor.Slotless Permanent Magnet Linear Synchronous Motor mainly comprises the compositions such as elementary, secondary and air gap.1. elementaryly mainly by elementary yoke, armature winding, support and pulley etc., formed.Every group of coil of armature winding tied up with glass tape, each winding effective edge has two places to tie up with glass tape, for fixedly winding is neat, in order to avoid loose, the full rate of impact groove (virtual groove) neat and winding, not that winding is all wound around, then with organosilicon glass paint cloth, be fixed on elementary cast steel plate (model: ZG200-400, size: 180 * 90 * 6mm), then use epoxy resin (model: 600L) fixedly winding on primary plate, epoxy resin (has stronger toughness after solidifying, bonding position adhesive strength is high, shock resistance, vibration resistance, solidfied material acid-proof alkaline is good, moistureproof and waterproof, grease proofing anti-dust performance is good, wet-heat resisting and atmospheric aging, there is good insulation, resistance to compression, electric and the physical characteristics such as adhesive strength height, avoid coil in motion process, to get loose phenomenon) before fixing winding, first say 120 ℃ of its heating, need about 1 hour time, after solid gum dissolves, be poured on the winding on fixing primary plate again, infiltration winding, be fixed on elementary yoke.2. by permanent magnet according to design size 14 * 90 * 7mm, be processed into needed shape, then carry out radial magnetizing.Then cast steel is processed into 900 * 110 * 5mm, effective size 900 * 90 * 5mm, the width of increase is the raceway of elementary pulley, and the permanent magnet processing is fixed on secondary steel plate with the epoxy resin having heated.3. use stainless steel (model: 304#, length 2mm, thickness 1.2mm, height 19mm) to be welded on elementary yoke both sides, by it and plastic nylon pulley (external diameter: 16mm, internal diameter: 4mm, width: 6mm) link, so that elementary motion.4. primary and secondary is installed, is guaranteed air gap 2mm, if not, adjust the height of pulley, guarantee motor gas-gap 2mm.Complete like this manufacture of Slotless Permanent Magnet Linear Synchronous Motor.

1, Analysis of Magnetic Field in Slotless Permanent Magnet Linear Synchronous Motor.On the basis of reasonable assumption, set up the physical model of Slotless Permanent Magnet Linear Synchronous Motor.Because the air gap of motor is larger, leakage field is more, adopts the magnetization of volume current density equivalence permanent magnet, and equivalent current density distributes along permanent magnet actual height; Armature supply density is processed by actual distribution.Proposed " the six layer line analytic modell analytical models " of Slotless Permanent Magnet Linear Synchronous Motor, analysed in depth motor internal magnetic field.

(1) equivalent armature current density

As shown in Figure 5, elementary do not have tooth and a groove to armature winding equivalent current density, and all windings are all fixing with epoxy resin casting.Armature supply density distribution distributes to consider by actual winding, the factor impacts such as imbalance that the iron core that employing can reduce Slotless Permanent Magnet Linear Synchronous Motor by cell current method cut-offs, end acts on and winding distributes.

The equivalent current density of armature winding

$J_s=\underset{n=1}{\overset{\∞}{\mathrm{\Σ}}}{b}_n\sin \left(\frac{\mathrm{n\π}}{{\mathrm{\τ}}_e}x\right)$

$\begin{array}{c}{b}_n=\frac{2}{{\mathrm{\τ}}_e}{\∫}_0^{{\mathrm{\τ}}_e}{J}_0\sin \left(\frac{\mathrm{n\π}}{{\mathrm{\τ}}_e}\right)\mathrm{dx}\\ =\frac{2}{{\mathrm{\τ}}_e}[-{\∫}_{\mathrm{\α}}^{\mathrm{\β}}{J}_0\sin \left(\frac{\mathrm{n\π}}{{\mathrm{\τ}}_e}x\right)\mathrm{dx}-\frac{1}{2}{\∫}_{\mathrm{\γ}}^{\mathrm{\γ}+w_c}{J}_0\sin \left(\frac{\mathrm{n\π}}{{\mathrm{\τ}}_e}x\right)\mathrm{dx}+\frac{1}{2}{\∫}_{\mathrm{\γ}+w_c+d_c}^{\mathrm{\γ}++d_c+{2w}_{\mathrm{cc}}}{J}_0\sin \left(\frac{\mathrm{n\π}}{{\mathrm{\τ}}_e}x\right)\mathrm{dx}]\\ =\frac{2}{{\mathrm{\τ}}_e}[-{\∫}_{\frac{d_c}{2}}^{w_c+\frac{d_c}{2}}{J}_0\sin \left(\frac{\mathrm{n\π}}{{\mathrm{\τ}}_e}x\right)\mathrm{dx}-\frac{1}{2}{\∫}_{\frac{4}{3}\mathrm{\τ}-w_c-\frac{d_c}{2}}^{\frac{4}{3}\mathrm{\τ}+\frac{d_c}{2}}{J}_0\sin \left(\frac{\mathrm{n\π}}{{\mathrm{\τ}}_e}x\right)\mathrm{dx}+\frac{1}{2}{\∫}_{\frac{4}{3}\mathrm{\τ}+\frac{d_c}{2}}^{\frac{4}{3}\mathrm{\τ}+\frac{d_2}{2}+w_{\mathrm{cc}}}{J}_0\sin \left(\frac{\mathrm{n\π}}{{\mathrm{\τ}}_e}x\right)\mathrm{dx}]\\ =\frac{{2J}_0}{\mathrm{n\π}}[\cos \left(\frac{\mathrm{n\π}}{{\mathrm{\τ}}_e}(w_c+\frac{d_c}{2})\right)-\cos (\frac{\mathrm{n\π}}{{\mathrm{\τ}}_e}\·\frac{d_c}{2})+\frac{1}{2}\cos \left(\frac{\mathrm{n\π}}{{\mathrm{\τ}}_e}(\frac{4}{3}\mathrm{\τ}-\frac{d_c}{2})\right)\\ -\frac{1}{2}\cos \left(\frac{\mathrm{n\π}}{{\mathrm{\τ}}_e}(\frac{4}{3}\mathrm{\τ}-\frac{d_c}{2}-w_c)\right)-\frac{1}{2}\cos \left(\frac{\mathrm{n\π}}{{\mathrm{\τ}}_e}(\frac{4}{3}\mathrm{\τ}+\frac{d_c}{2}+w_c)\right)+\frac{1}{2}\cos \left(\frac{\mathrm{n\π}}{{\mathrm{\τ}}_e}(\frac{4}{3}\mathrm{\τ}+\frac{d_c}{2})\right)]\\ =-\frac{{4J}_0}{\mathrm{n\π}}[1-\cos \left(\frac{2}{3}\mathrm{n\π}\right)]\sin \left(\frac{\mathrm{n\π}}{{\mathrm{\τ}}_e}\left(\frac{d_c+w_c}{2}\right)\right)\sin (\frac{\mathrm{n\π}}{{\mathrm{\τ}}_e}\·\frac{w_c}{2})\end{array}$

$\mathrm{\α}=\frac{d_c}{2}$

$\mathrm{\β}=\mathrm{\α}+w_c=w_c+\frac{d_c}{2}$

$\mathrm{\γ}=\frac{4}{3}\mathrm{\τ}-w_c-\frac{d_c}{2}$

τ _e＝2τ

In formula, d _cthe distance of-winding two effective edges; w _c-winding width; τ-pole span.

(2) secondary permanent magnet equivalent current density

Adopt Equivalent magnetizing current equivalence permanent magnet current density, its permanent magnet equivalence magnetic potential distributes as shown in Figure 6:

$J_m=\frac{\mathrm{dM}}{\mathrm{dx}}$

$J_m=\underset{n=\mathrm{1,3}}{\overset{\∞}{\mathrm{\Σ}}}{(-1)}^{\frac{n+3}{2}}\frac{{4M}_0}{\mathrm{\τ}}\sin \left(\frac{\mathrm{n\π}}{\mathrm{\τ}}(\frac{L_m}{2}-x)\right)$

$J_m=\underset{n=\mathrm{1,3}}{\overset{\∞}{\mathrm{\Σ}}}{a}_n\sin \left(\frac{\mathrm{n\π}}{\mathrm{\τ}}(\frac{L_m}{2}-x)\right)$

$\mathrm{\α}=\frac{\mathrm{\τ}-L_m}{2}$

$\mathrm{\β}=\frac{\mathrm{\τ}+L_m}{2}$

$a_n={(-1)}^{\frac{n+3}{2}}\frac{{4M}_0}{\mathrm{\τ}}$

$M_0=\frac{B_r}{{\mathrm{\μ}}_0}$

In formula, B _r-permanent magnet remanent flux density; M ₀-permanent magnet magnetization intensity; L _m-permanent magnet longitudinal length; μ ₀-air permeability.

(3) six layer line analytic modell analytical models

Supposition based on Slotless Permanent Magnet Linear Synchronous Motor physical model, sets up the ideal model in magnetic field, and this model is each layer of evenly linear six layers of structure, as shown in Figure 7.

In figure, μ ₁-secondary yoke magnetic permeability; μ ₂-elementary yoke magnetic permeability; μ ₀-air permeability; h _j1-elementary yoke height; h _j2-secondary yoke height; B-permanent magnet height; a ₁-armature winding height.

(4) structural model as shown in Figure 8.

2, the design of Slotless Permanent Magnet Linear Synchronous Motor.Propose the design of Slotless Permanent Magnet Linear Synchronous Motor, according to the performance of primary and secondary material and feature, in conjunction with the requirement of motor, determined electric machine structure form.On the basis of Analysis of Magnetic Field in Slotless Permanent Magnet Linear Synchronous Motor, theoretical in conjunction with the Electromagnetic Design of motor, carry out Electromagnetic Design, and work out electromagnetism nucleus correcting program.

(1) design of Slotless Permanent Magnet Linear Synchronous Motor as shown in Figure 9.

(2) electric machine structure

Slotless Permanent Magnet Linear Synchronous Motor can be divided into pancake, cylindrical shape by version.Pancake can be divided into single side type and double-flanged end; It can be divided into again secondary, long elementary short secondary the dividing of short elementary length, and its version is distinguished as shown in Figure 10, Figure 11:

Slotless Permanent Magnet Linear Synchronous Motor is comprised of primary and secondary two parts.Secondaryly by permanent magnet and yoke two parts, formed, elementaryly by yoke and armature winding two parts, formed.Primary and secondary arbitrary part all can be used as mover, secondary if mover adopts, the elementary energising winding of installing in mover motion whole process; Otherwise mover is energising winding, secondary is N, the S permanent magnet of alternately installing along straight line.If while adopting secondary fixing, structure that mover is energising winding, in application scenario remote, high thrust, the permanent magnet needing is many, the cost of entire system is higher; Simultaneously because mover need to adopt, drag line supply power mode, in running, easily open circuit, the fault such as electric leakage, short circuit.If while adopting elementary fixing and collateral motion structure, in remote application scenario, most of electric energy is by winding loss, efficiency is extremely low; For saves energy adopts sectional power supply, but need complicated control to guarantee reliable power supply.By pluses and minuses separately above, in conjunction with the market demand, design the secondary Slotless Permanent Magnet Linear Synchronous Motor of the short elementary length of pancake herein.

(2) Electromagnetic Design as shown in figure 12.

3, the emulation of Slotless Permanent Magnet Linear Synchronous Motor.According to the structural parameters of the Slotless Permanent Magnet Linear Synchronous Motor of designed, designed, adopt analytic method, Finite Element to carry out dynamic and static specificity analysis, mainly comprise that magnetic is close, the parameter such as magnetic linkage, static force-displacement behavior, magnetic resistance resistance, electromagnetic push, self-induction, mutual inductance, speed and acceleration, and result is analyzed and is discussed.(1) physical dimension of design motor

Table 3 electric machine structure parameter

(2) static characteristics analysis

(a) air gap flux density

Adopt analytic method, finite element method analysis Slotless Permanent Magnet Linear Synchronous Motor electromagnetic field, can help structural analysis and calculation of parameter.

A) two-dimentional magnetic is as shown in figure 13 close.

B) shown in Three-Dimensional Magnetic Miru Figure 14-15.

(b) electromagnetic push

The electromagnetic push of Slotless Permanent Magnet Linear Synchronous Motor is as Figure 16.As can be seen from the figure Slotless Permanent Magnet Linear Synchronous Motor ratio has the electromagnetic push of groove permanent magnet linear synchronous motor (physical dimension is identical with slotless electric machines) little 5 times; It can also be seen that slotless electric machines electromagnetic push is smoother, stable simultaneously, and have the electromagnetic push fluctuation ratio of groove motor larger, and there is a little wave head, unsmooth, easily cause thrust unstable, cause vibration large, have noise, slotless electric machines ratio has groove Electric Machine Control precision high, steady thus, is applicable to the occasion that control precision is high, thrust is little.

(c) magnetic resistance resistance

1. two kinds of mode comparisons

The magnetic resistance resistance of Slotless Permanent Magnet Linear Synchronous Motor is as Figure 17.As can be seen from the figure Slotless Permanent Magnet Linear Synchronous Motor end magnetic resistance resistance force oscillation is large, and the reason of this phenomenon is that iron core cut-offs and end effect, and leakage field increases; And middle magnetic resistance comparison of resistance is little, the reason of this phenomenon is to only have permanent magnet and the effect of elementary end, the more important thing is that leakage field reduces.By analysis, show, with ANSYS software analysis magnetic resistance resistance, account for 1.97% of thrust, MAGNET software analysis magnetic resistance resistance accounts for the 1.954%. of thrust, and its analysis result is basically identical; And Analytic Method magnetic resistance resistance is zero, reason is to ignore end and impact of cut-offfing unshakable in one's determination, therefore without end resistance, without magnetic resistance resistance.

2. the comparison of two kinds of motors

Under same size, Slotless Permanent Magnet Linear Synchronous Motor with have the magnetic resistance comparison of resistance of groove permanent magnet linear synchronous motor as Figure 18.. as can be seen from the figure slotless electric machines is except being subject to influence of end effect, and middle smoother, magnetic resistance resistance is also smaller, and have groove motor except being subject to influence of end effect, be also subject to the impact of teeth groove, so rough and uneven in surface, size constantly changes, so this motor oscillating noise is large; As can be seen from the figure there is the magnetic resistance resistance ratios slotless of groove permanent magnet linear synchronous motor greatly nearly a hundred times, so Slotless Permanent Magnet Linear Synchronous Motor is suitable for the occasion that requirement is level and smooth, noise is little, control precision is high simultaneously.

(3) dynamically step response analysis

(a) speed drive electromagnetic push

Slotless Permanent Magnet Linear Synchronous Motor speed drive electromagnetic push, as Figure 19.Maximum thrust under synchronous speed is set, be 31.3N, than design starting thrust large 4.33%.Force oscillation reason is to be affected by the cut-offfing of iron core, end effect and the armature winding factor such as uneven that distributes.

(b) load drives electromagnetic push

Slotless Permanent Magnet Linear Synchronous Motor load drives electromagnetic push, as Figure 20.The large 1N of load drive ratio speed drive thrust, its reason be with finite element solving parameter arrange relevant, as mesh generation, step-length and solving precision etc.If subdivision precision is high, step-length is little and solving precision is high, the time that solves is long, precision is high, fluctuation is little; Otherwise the time that solves is short, precision is low, fluctuation is large.Under the condition meeting the demands, improve solving precision and subdivision precision as far as possible.Speed ceaselessly fluctuates simultaneously, and power also changes with velocity variations, so power ceaselessly fluctuates.

(c) transient analysis electromagnetic push

Slotless Permanent Magnet Linear Synchronous Motor transient analysis electromagnetic push, as Figure 21.Transient analysis refers to the electric current that passes into variation in armature winding, does not primary and secondaryly move.Maximum electromagnetic push is 32.21N, and thrust is about 7.37% with design starting thrust error, take starting thrust as benchmark.By analysis, show, cause the reason of error relevant with parameter setting and physical dimension, but error is within engineering allowed band, shows the validity of method therefor and the reasonability of structural design size.

4, the impact of Slotless Permanent Magnet Linear Synchronous Motor structural parameters on electromagnetic parameter and performance.Adopt two kinds of methods to combine and analyzed the impact of electric machine structure parameter on electromagnetic parameter and performance parameter, and result is analyzed and discussed.

(1) impact of gas length on air gap flux density

1) permanent magnet independent role

The impact of different air gap on air gap flux density, adopts analytic method, the close maximum of finite element method analysis different air gap magnetic.Different air gap to the influence curve of air gap flux density as Figure 22.As can be seen from the figure, along with air gap increases, x direction magnetic is close to be increased gradually, and y direction magnetic is close to be reduced gradually.The reason of this phenomenon is that along with air gap increases, leakage field increases, through the close minimizing of air gap effect primary magnetic.Air gap increases to a certain degree, and the close increase of x direction magnetic reduces, and curve trend is level and smooth; The close minimizing of y direction magnetic reduces, and curve trend is level and smooth, and reason is that leakage field increases to certain degree, and permanent magnet is no longer obvious to elementary effect.

2) armature winding independent role

The impact of different air gap on air gap flux density, adopts analytic method, the close maximum of finite element method analysis different air gap magnetic.Different air gap on the impact of air gap flux density as Figure 23.As can be seen from the figure, along with air gap increases, x, the close all significantly minimizings of y direction magnetic.The reason of this phenomenon is that along with air gap increases, leakage field increases, through the close minimizing of air gap effect secondary magnetic.Along with air gap increases to certain degree, the close effect of magnetic is not obviously, and curve trend is level and smooth.The reason of this phenomenon is that leakage field increases to certain degree, and leakage field effect is no longer obvious.

As seen from the figure, permanent magnet, armature effect are extremely important for the selection of air gap, are determining the size of load thrust and the reasonability of motor size design.

(2) impact of permanent magnet longitudinal length on electromagnetic push

Permanent magnet longitudinal length on the impact of electromagnetic push as Figure 24.As can be seen from the figure, the electromagnetic push of motor starts to increase along with the increase of permanent magnet longitudinal length, and when permanent magnet longitudinal length is increased to a certain degree, electromagnetic push no longer increases with permanent magnet longitudinal length is linear, and recruitment diminishes.In this length range, can be described as " sensitive volume " of permanent magnet longitudinal length to electromagnetic push.When selecting permanent magnet longitudinal length, choose optimum value as far as possible, so not only can guarantee electromagnetic push but also can reduce costs, avoid causing waste.

(3) impact of permanent magnet height on electromagnetic push

Adopt analytic method, finite element method analysis permanent magnet magnetization height on the impact of electromagnetic push as Figure 25.From figure, we can find out the increase with permanent magnet magnetization height, and electromagnetic push is increasing.When permanent magnet magnetization height increases, surpass to a certain degree, it is mild that electromagnetic push increases trend.Therefore,, while choosing permanent magnet magnetization height, conventionally choose work linear zone.

(4) impact of gas length on electromagnetic push

Adopt analytic method, finite element method analysis gas length on the impact of electromagnetic push as Figure 26.As can be seen from the figure,, along with the increase of gas length, the electromagnetic push of motor reduces rapidly; When gas length increases to a certain degree, it is almost nil that the electromagnetic push of motor changes slope.The reason of this phenomenon is that air-gap increases to certain degree, and the leakage field of air also increases to a certain degree, affected by magnetic fields hardly, so the electromagnetic push of motor tends to level and smooth along with the increase of gas length.

(5) impact of permanent magnet transverse width on electromagnetic push

Permanent magnet transverse width is also an important parameter of design of electrical motor.The electromagnetic push of motor has close contacting with it, can express the contact between it by maxwell's tension force vector method expression formula.In the situation that other condition is constant, electromagnetic push and permanent magnet transverse width relation are as Figure 27.As can be seen from the figure, electromagnetic push increases along with the increase of permanent magnet transverse width, presents linear relationship and changes.

The above; it is only preferably embodiment of the present invention; protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses, the simple change of the technical scheme that can obtain apparently or equivalence are replaced and are all fallen within the scope of protection of the present invention.

Claims (5)

1. a Slotless Permanent Magnet Linear Synchronous Motor, it is characterized in that, comprise mover, air gap and stationary part, described mover consists of elementary yoke and winding, winding stops up by glass tape, then winding is fixed on elementary yoke by organosilicon glass paint cloth, then by also fixed thereon of epoxy encapsulation; Permanent magnet and secondary yoke are stationary part, and permanent magnet is fixed on secondary yoke with epoxy resin.

2. Slotless Permanent Magnet Linear Synchronous Motor according to claim 1, it is characterized in that, the copper conductor that described winding adopts is polyester enamelled wire, and class of insulation B, plain conductor wire diameter are that 1.00 ± 0.15mm, enamelled wire wire diameter are 1.07mm, every phase 150 circles, every groove 50 circles, actual wire sectional area 0.785mm ², actual wire current density 4.77465A/mm ², wire area occupied is 57.245mm ², copper factor is 76.736%; Glass tape adopts alkali-free glass wool, and alkali-free glass wool thickness 0.1mm, width are that 10mm, model are 0.1 * 10mm; Between winding, do not overlap mutually, winding is concentrated winding, individual layer, and organosilicon glass paint cloth specification is: 0.1mm * 1000mm.

3. Slotless Permanent Magnet Linear Synchronous Motor according to claim 1, is characterized in that, permanent magnet material adopts neodymium iron boron NTP-264H, its major parameter B _{r20 °}=1.15T, B _{r75 °}=1.0741T, H _{r20 °}=875KA/m, H _{r75 °}=817.25KA/m, working temperature is 75 ℃, permanent magnet longitudinal length 14mm, permanent magnet transverse width 90mm, permanent magnet magnetization height 7mm, is shaped as the cuboid of rectangle.

4. Slotless Permanent Magnet Linear Synchronous Motor according to claim 1, is characterized in that, elementary yoke and secondary conjugated material are selected cast steel, and the thickness of elementary yoke is 6mm, and the thickness of secondary yoke is 5mm, the cuboid that is shaped as rectangle of elementary yoke and secondary yoke.

5. a manufacture method for Slotless Permanent Magnet Linear Synchronous Motor, is characterized in that, comprises the following steps:

(1) according to the requirement of design, the major parameter of determining this motor is starting thrust, the number of phases and connection, rated frequency, synchronizing speed and rated current etc., carrying out electric machine structure parameter designing, electromagnetic parameter and performance parameter calculates, and performance parameter is checked, finally determine motor size and material;

(2) the elementary manufacture of motor; 1. elementary yoke machine-shaping; 2. according to the design armature winding number of turn, be wound around and tie up with glass tape, then armature winding is fixed on elementary yoke with organosilicon glass paint cloth, with epoxy resin after melting, armature winding is being fixed on elementary yoke; 3. elementary mounting bracket and skidding;

(3) the secondary manufacture of motor; 1. secondary yoke machine-shaping; 2. permanent magnet machine-shaping magnetizing; 3. permanent magnet is fixed on secondary yoke with epoxy resin;

(4) assembling of motor; Between motor elementary and secondary, effective air gap is 2mm, if can not meet, adjusting pole and pulley, until meet the demands;

(5) motor debugging.