CN202153696U - Multilayer connecting shaft type external rotor permanent magnetism brushless motor - Google Patents
Multilayer connecting shaft type external rotor permanent magnetism brushless motor Download PDFInfo
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- CN202153696U CN202153696U CN2011201629883U CN201120162988U CN202153696U CN 202153696 U CN202153696 U CN 202153696U CN 2011201629883 U CN2011201629883 U CN 2011201629883U CN 201120162988 U CN201120162988 U CN 201120162988U CN 202153696 U CN202153696 U CN 202153696U
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Abstract
The utility model relates to a multilayer connecting shaft type external rotor permanent magnetism brushless motor, comprising more than two motor monomers. All the monomer external rotors are connected to the same rotating shaft. The external rotor of each monomer symmetrically and evenly arranges N permanent magnet blocks (N being an even number) upon the inner wall of the rotor cylindric magnetizer. The magnetic polarities of the adjacent permanent magnetism salient poles are different. The stator of each monomer symmetrically and evenly arranges N excitation salient poles at the outboard of the stator seat, with the magnetic polarities of the adjacent excitation salient poles being different. The included angle of the adjacent excitation salient pole radial center line is equal to that of the adjacent rotor permanent magnetism salient pole radial center line. Moreover, the axial dimension of the stator excitation salient pole is equal to that of the rotor permanent magnetism salient pole. The rotor permanent magnetism salient pole position and magnetic polarity distribution of each monomer are equal. The stator excitation salient poles present a magnetic isolation state between each other. Moreover, an angular difference alpha is existed between the stator excitation salient pole radial center lines. The multilayer connecting shaft type external rotor permanent magnetism brushless motor features simple structure and control and large torque output, particularly applicable to electric tool.
Description
Technical field
The utility model relates to a kind of bisalient-pole permanent-magnet motor, especially is a kind of external rotor permanent magnet motor of new structure.
Background technology
The stator excitation salient pole number of traditional double salient pole permanent magnet motor will could guarantee normal startup of motor and running like this more than rotor permanent magnetism salient pole number.The salient pole number of motor rotor and stator is many more, and the diameter of this motor also can increase thereupon, and volume, weight, cost increase thereupon, adds that the factor of control circuit complex effects reliability is many etc., makes the range of application of motor receive certain restriction.Especially for some electric tools commonly used, the motor volume is little, torque is high owing to requiring, so be difficult to the advantage of permanent magnet motor is used in electric tool widely.
The utility model content
The utility model purpose is to provide a kind of brand new external rotor permanent magnet motor, under the prerequisite that does not increase electromotor diameter, through setting up sandwich construction, improves the torque output and the power of motor.
Be to realize that above-mentioned purpose, the technical scheme of the utility model are, this motor is made up of two above external rotor permanent magnet brushless motor monomers, and each motor monomer external rotor is fixedly connected on the same rotation axis of this motor; The external rotor of said motor monomer is made up of cylindric magnetic conductor and even number permanent magnet blocks; Permanent magnet blocks is arranged on cylindric magnetic conductor inwall symmetrically and forms the permanent magnetism salient pole; The unidirectional magnetic polarity of adjacent permanent magnetism salient pole is different, and cylindric magnetic conductor is fixedly connected with rotation axis through non-magnetic conduction support; The stator of said motor monomer is made up of stator seat and even number field excitation salient pole; Field excitation salient pole is arranged on the periphery of stator seat symmetrically; Field excitation salient pole constitutes around the peripheral magnet exciting coil of this laminated core by laminated core is sharp; When in the magnet exciting coil during at the same sense of current; The magnetic polarity of adjacent field excitation salient pole is different, and the angle of adjacent field excitation salient pole radial centre lines equates with the angle of the adjacent permanent magnetism salient pole of same motor monomer rotor radial centre lines, and the axial dimension of stator excitation salient pole is identical with the axial dimension of rotor permanent magnetism salient pole; The field excitation salient pole here " radial centre lines " is meant from the motor rotation axis line, passes the ray of stator excitation salient pole arc section central point; The be provided with position, magnetic polarity of permanent magnetism salient pole distributes all identical on the rotor of said each motor monomer; And be the magnetic isolation between the field excitation salient pole of each motor monomer stator each other, there is angular difference between the field excitation salient pole radial centre lines of each motor monomer stator.The α angle here is relevant with the step angle of single motor monomer, and also the number with the motor monomer is relevant.The salient pole number of single motor monomer is many more, and step angle is then more little, and the number of the motor monomer that rotation axis is connected is many more, and the α angle is also more little.
In the present technique scheme; Rotor permanent magnetism salient pole number is identical with stator excitation salient pole number; The starting state of this motor can be confirmed from the location status of different motor monomers; Can to make stator excitation salient pole number be two to each motor monomer like this, and rotor permanent magnetism salient pole number also is two simple motor structure, increases torque when present technique scheme electromotor diameter reduces.
On the technique scheme basis, the utility model gives concrete external rotor permanent magnet brushless motor structure.
Structure one:
This motor is made up of two motor monomers, and each motor monomer constitutes by the external rotor of two permanent magnetism salient poles and the stator of two field excitation salient poles, and two motor monomer external rotors all are fixedly connected with rotation axis;
This motor external rotor is made up of a cylindric magnetic conductor and four permanent magnet blocks; Two permanent magnet blocks are arranged on the top of cylindric magnetic conductor two ends inwall; And these two permanent magnet blocks are on same the axis; The N polarity salient pole of these two permanent magnet blocks points to rotation axis, and two other permanent magnet blocks is arranged on the below of cylindric magnetic conductor two ends inwall, and these two permanent magnet blocks are on same the axis; The S polarity salient pole of these two permanent magnet blocks points to rotation axis, and relative with the N polarity salient pole of cylindric magnetic conductor two ends inwall top;
The disc connecting plate outer rim of a non-magnetic conduction and cylindric magnetic conductor middle part inwall fix, and this disc connecting plate center and rotating spindle are fixed, and the disc connecting plate is divided into two spaces with cylindric magnetic conductor;
This motor stator is made up of left end cap and left field excitation salient pole and right end cap and right field excitation salient pole; Left side field excitation salient pole is identical with right field excitation salient pole structure; All be to constitute by " worker " font laminated core and two magnet exciting coils that are positioned at the rotating shaft both sides around the iron core periphery; Left side field excitation salient pole forms two magnetic salient poles; Right field excitation salient pole also forms two magnetic salient poles, and left field excitation salient pole is fixed in the right flank of left end cap, and right field excitation salient pole is fixed in the left surface of right end cap; Left end cap and right end cap be the left end and the right-hand member of fixed motor housing respectively; Left field excitation salient pole is in the external rotor left end permanent magnet salient pole formed rotation dignity of when rotation, when making right field excitation salient pole be in the rotation of external rotor right-hand member permanent magnet salient pole in the formed rotation dignity, and has differential seat angle 90 degree between the radial centre lines of the radial centre lines of left field excitation salient pole and right field excitation salient pole; Be the magnetic isolation between left side field excitation salient pole and the right field excitation salient pole; Two magnet exciting coil serial or parallel connections of left side field excitation salient pole, two magnet exciting coil serial or parallel connections of right field excitation salient pole are connected to excitation control power supply respectively with two inputs of left field excitation salient pole magnet exciting coil and two inputs of right field excitation salient pole magnet exciting coil again.
Structure two:
This motor is made up of two motor monomers, and each motor monomer constitutes by the external rotor of four permanent magnetism salient poles and the stator of four field excitation salient poles, and two motor monomer external rotors all are fixedly connected with rotation axis;
This motor external rotor is made up of a cylindric magnetic conductor and eight permanent magnet blocks; Two permanent magnet blocks are arranged on the top of cylindric magnetic conductor two ends inwall; And these two permanent magnet blocks are on same the axis, and the S polarity salient pole of these two permanent magnet blocks points to rotation axis, and two permanent magnet blocks are arranged on the below of cylindric magnetic conductor two ends inwall; And these two permanent magnet blocks are on same the axis; The S polarity salient pole of these two permanent magnet blocks points to rotation axis, and two permanent magnet blocks are arranged on the left of cylindric magnetic conductor two ends inwall, and these two permanent magnet blocks are on same the axis; The N polarity salient pole of these two permanent magnet blocks points to rotation axis; Two permanent magnet blocks are arranged on the right-hand of cylindric magnetic conductor two ends inwall, and these two permanent magnet blocks are on same the axis N polarity salient pole sensing rotation axis of these two permanent magnet blocks;
The disc connecting plate outer rim of a non-magnetic conduction and cylindric magnetic conductor middle part inwall fix, and this disc connecting plate center and rotation axis are fixed, and the disc connecting plate is divided into two spaces with cylindric magnetic conductor;
This motor stator is made up of left end cap and left field excitation salient pole and right end cap and right field excitation salient pole; Left side field excitation salient pole is identical with right field excitation salient pole structure; All be to constitute by " ten " word shape laminated core with around four peripheral magnet exciting coils of this laminated core, left field excitation salient pole and right field excitation salient pole respectively form four magnetic salient poles, and left field excitation salient pole is fixed in the right flank of left end cap; Right field excitation salient pole is fixed in the left surface of right end cap; Left end cap and right end cap be the left end and the right-hand member of fixed motor housing respectively, when making left field excitation salient pole be in the rotation of external rotor left end permanent magnetism salient pole in the formed rotation dignity, when making right field excitation salient pole be in the rotation of external rotor right-hand member permanent magnetism salient pole in the formed rotation dignity; And left field excitation salient pole radial centre lines and right field excitation salient pole radial centre lines differ 45 degree; Be the magnetic isolation between a left side field excitation salient pole and the right field excitation salient pole, four magnet exciting coils of left field excitation salient pole or serial or parallel connection are merged into two inputs; The coiling direction of four magnet exciting coils of left side field excitation salient pole makes when magnet exciting coil feeds same direction exciting current; Can make that the magnetic polarity of adjacent salient pole of left field excitation salient pole is opposite, same, four magnet exciting coils of right field excitation salient pole or serial or parallel connection; Merge into two inputs; The coiling direction of four magnet exciting coils of right field excitation salient pole makes when magnet exciting coil feeds same direction exciting current, can make that the magnetic polarity of adjacent salient pole of right field excitation salient pole is opposite, and two inputs of magnet exciting coil of two inputs of magnet exciting coil of left field excitation salient pole and right field excitation salient pole are connected to excitation respectively and control power supply.
Structure three:
This motor is made up of three motor monomers, and each motor monomer constitutes by the external rotor of four permanent magnetism salient poles and the stator of four field excitation salient poles, and three motor monomer external rotors all are fixedly connected with rotation axis;
This motor external rotor is divided into left and right two parts; The left half external rotor is made up of a cylindric magnetic conductor and eight permanent magnet blocks, and two permanent magnet blocks are arranged on the top of cylindric magnetic conductor two ends inwall, and these two permanent magnet blocks are on same the axis; The S polarity salient pole of these two permanent magnet blocks points to rotation axis; Two permanent magnet blocks are arranged on the below of cylindric magnetic conductor two ends inwall, and these two permanent magnet blocks are on same the axis S polarity salient pole sensing rotation axis of these two permanent magnet blocks; Two permanent magnet blocks are arranged on the left of cylindric magnetic conductor two ends inwall; And these two permanent magnet blocks are on same the axis, and the N polarity salient pole of these two permanent magnet blocks points to rotation axis, and two permanent magnet blocks are arranged on the right-hand of cylindric magnetic conductor two ends inwall; And these two permanent magnet blocks are on same the axis, and the N polarity salient pole of these two permanent magnet blocks points to rotation axis; The right half external rotor is made up of a bowl-shape magnetic conductor and four permanent magnet blocks; One of them permanent magnet blocks is arranged on the top of bowl-shape magnetic conductor inwall; The S polarity salient pole of this piece permanent magnet blocks points to rotation axis, and one of them permanent magnet blocks is arranged on the below of bowl-shape magnetic conductor inwall, and the S utmost point protrusion of this piece permanent magnet blocks points to rotation axis; One of them permanent magnet blocks is arranged on the left of bowl-shape magnetic conductor inwall; The N polarity salient pole of this piece permanent magnet blocks points to rotation axis, and one of them permanent magnet blocks is arranged on the right-hand of bowl-shape magnetic conductor inwall, and the S polarity salient pole of this piece permanent magnet blocks points to rotation axis;
The disc connecting plate outer rim of a non-magnetic conduction and cylindric magnetic conductor middle part inwall fix, and this disc connecting plate center and rotation axis are fixed, and the rotating shaft center place of bowl-shape magnetic conductor is fixedly connected with rotation axis;
This motor stator is made up of left end cap, stator seat and left field excitation salient pole, middle field excitation salient pole and right field excitation salient pole; Left side field excitation salient pole, middle field excitation salient pole and right field excitation salient pole are constructed identical; All be to constitute by " ten " word shape laminated core with around four peripheral magnet exciting coils of this laminated core, left field excitation salient pole, middle field excitation salient pole and right field excitation salient pole respectively form four magnetic salient poles, and left field excitation salient pole is fixed in the right flank of left end cap; Middle field excitation salient pole is fixed in the left surface of stator seat; Right field excitation salient pole is fixed in the right flank of stator seat, and left end cap is fixedly connected with the left end of motor field frame, and stator seat is fixedly connected with the right-hand member of motor field frame; When making left field excitation salient pole be in the rotation of cylindric magnetic conductor left end permanent magnetism salient pole in the formed rotation dignity; When making field excitation salient pole be in the rotation of cylindric magnetic conductor right-hand member permanent magnetism salient pole in the formed rotation dignity, when making right field excitation salient pole be on the bowl-shape magnetic conductor inwall rotation of permanent magnetism salient pole in the formed rotation dignity, and make between left field excitation salient pole radial centre lines and the middle field excitation salient pole radial centre lines and differ 30 degree; Right field excitation salient pole radial centre lines and middle field excitation salient pole radial centre lines also differ 30 degree; Right field excitation salient pole radial centre lines and left field excitation salient pole radial centre lines then differ 60 degree, are the magnetic isolation each other between left field excitation salient pole, middle field excitation salient pole and the right field excitation salient pole three, four magnet exciting coils of left field excitation salient pole or serial or parallel connection; Merge into two inputs; The coiling direction of four magnet exciting coils of left side field excitation salient pole makes when magnet exciting coil feeds same direction exciting current, can make that the magnetic polarity of adjacent salient pole of left field excitation salient pole is opposite, equally; In four magnet exciting coils or the serial or parallel connection of field excitation salient pole; Merge into two inputs, the coiling direction of four magnet exciting coils of middle field excitation salient pole makes when magnet exciting coil feeds same direction exciting current, can make that the magnetic polarity of adjacent salient pole of middle field excitation salient pole is opposite; Equally; Four magnet exciting coils of right field excitation salient pole or serial or parallel connection are merged into two inputs, and the coiling direction of four magnet exciting coils of right field excitation salient pole makes when magnet exciting coil feeds same direction exciting current; Can make that the magnetic polarity of adjacent salient pole of right field excitation salient pole is opposite, two inputs of two inputs of magnet exciting coil of left field excitation salient pole and the magnet exciting coil of middle field excitation salient pole and two inputs of magnet exciting coil of right field excitation salient pole are connected to excitation control power supply respectively.
In the multilayer coupling type external rotor permanent magnet brushless motor of above-mentioned various structures; Be provided with position transducer with external rotor on the stator of said each motor monomer, on the position when each position transducer is separately positioned on and aligns corresponding to the stator excitation salient pole of each motor monomer and rotor permanent magnetism salient pole.
The utility model has the advantages that:
1) innovated traditional permanent magnetism biconvex pole motor structure; The number of poles corresponding relation of having broken through the strict of traditional double salient pole dc permanent magnet stator salient pole number and rotor with salient pole number and can't having changed; Thereby the structure and the control circuit of permanent magnetism biconvex pole motor have been simplified greatly; Simultaneously, multilayer motor one-body shaft has guaranteed the stable of motor start-up running status on the one hand to the structure that connects; Improve the output torque of motor on the other hand greatly, be particularly useful for electromotor diameter, volume, weight are had the electric tool of strict demand.
2) the self-locking effect is arranged during obstructed electric current in motor coil.
3) the extremely simple structure with brushless electric machine of control structure can change that the existing efficient of commutator machine of conventional electric instrument use is low, spark is big, failure rate is high, the drawback of poor stability.
Description of drawings
Fig. 1 is the structure cutaway view of the utility model embodiment one.
Fig. 2 is the A-A profile of Fig. 1.
Fig. 3 is the B-B profile of Fig. 1.
Fig. 4 is the structure cutaway view of the utility model embodiment two.
Fig. 5 is the C-C profile of Fig. 4.
Fig. 6 is the D-D profile of Fig. 4.
Fig. 7 is the structure cutaway view of the utility model embodiment three.
Fig. 8 is the E-E profile of Fig. 7.
Fig. 9 is the F-F profile of Fig. 7.
Figure 10 is the G-G profile of Fig. 7.
In the above accompanying drawing, the 11st, motor boot, the 12nd, permanent magnet salient pole, the 13rd, stator excitation salient pole, the 14th, magnet exciting coil, the 15th, cylindric magnetic conductor; The 16th, disc connecting plate, the 17th, right end cap, the 18th, stator seat, the 19th, rotation axis, the 20th, left end cap, the 21st, permanent magnet salient pole; The 22nd, motor boot, the 23rd, cylindric magnetic conductor, the 24th, disc connecting plate, the 25th, stator excitation salient pole, the 26th, magnet exciting coil, the 27th, rotation axis; The 28th, right end cap, the 29th, bearing, the 30th, left end cap, the 40th, left end cap, the 41st, motor cylinder shape guard shield, the 42nd, rotor permanent magnetism salient pole; The 43rd, stator excitation salient pole, the 44th, magnet exciting coil, the 45th, cylindric magnetic conductor, the 46th, disc connecting plate, the 47th, rotor permanent magnetism salient pole; The 48th, stator seat, the 49th, bowl-shape magnetic conductor, the 50th, the bowl-shape guard shield of motor, the 51st, rotor permanent magnetism salient pole, the 52nd, rotation axis.
Embodiment
Embodiment one:
Present embodiment axially connects institute by two motor monomer rotation axiss and constitutes, and each motor monomer is to be made up of the stator of two " worker " font field excitation salient poles and the external rotor of two permanent magnetism salient poles.Shown in accompanying drawing 1.
In the present embodiment, external rotor has adopted integrated easy structure, is about to two motor monomer external rotor permanent magnet salient poles and is fixed on same cylindric magnetic conductor inwall.The middle part of cylindric magnetic conductor 15 is fixedly connected with the discoid connecting plate 16 of non-magnetic conduction; The discoid connecting plate 16 of non-magnetic conduction is fixedly connected with motor rotation axis 19; Cylindric magnetic conductor 15 is divided into two cavitys by the discoid connecting plate of non-magnetic conduction, is fixed with permanent magnet blocks 12 directly over cylindric magnetic conductor 15 left ends, and the N salient pole of this permanent magnet blocks 12 points to rotation axis; Be fixed with permanent magnet blocks under cylindric magnetic conductor 16 left ends; The S salient pole of this permanent magnet blocks points to rotation axis, also is fixed with permanent magnet blocks directly over the cylindric magnetic conductor right-hand member, and the N salient pole of this permanent magnet blocks points to rotation axis; Under also be fixed with permanent magnet blocks, the S salient pole of this permanent magnet blocks points to rotation axis.Same orientation, the left and right two ends of cylindric magnetic conductor same polarity permanent magnetism salient pole is positioned at same axis.Left side stator excitation salient pole is fixed on the right flank of left end cap 20; Left side stator excitation salient pole forms two salient poles by " worker " font laminated core; It is peripheral that magnet exciting coil 14 is around in this laminated core; The coiling direction of magnet exciting coil is when the same sense of current of coil, and when making a salient pole of this stator excitation salient pole present the N utmost point, another salient pole then presents the S utmost point.Right stator excitation salient pole is fixed in the left surface of right side end cap 17, and the shape of right side stator excitation salient pole is identical with structure with the shape of left side stator excitation salient pole with structure.When left end cap 20 and right end cap 17 and motor boot 11 two ends are fixed; And arranged on left and right sides stator excitation salient pole is permanent magnetism salient pole axial location strict conformance on axial position and cylindric magnetic conductor; Promptly the stator excitation salient pole when each motor monomer of both sides aligns with rotor permanent magnetism salient pole, and nearly all magnetic line of force all passes the air gap between stator excitation salient pole and rotor permanent magnetism salient pole.Form a closed magnetic loop the shortest; Unique difference of left side stator excitation salient pole and right stator excitation salient pole is; There are 90 degree angles between left side stator excitation salient pole radial centre lines and the right stator excitation salient pole radial centre lines, just fixing formation when the α angle of these 90 degree is assembling motor.Like accompanying drawing 2, shown in 3.
" magnetic resistance minimum principle " rule of being followed according to electromagnetism " same sex is repelled each other, and there is a natural attraction between the sexes " basic principle and biconvex pole switching reluctance motor; In present embodiment motor external rotor rotary course; External rotor permanent magnet salient pole in the sinistral motor monomer and stator " worker " font field excitation salient pole over against, shown in accompanying drawing 2, formed the shortest closed magnetic circuit state between rotor permanent magnetism salient pole and the stator excitation salient pole; Turn-off stator exciting coil electric current in the sinistral motor monomer this moment; Interaction force between rotor permanent magnetism salient pole and the stator excitation salient pole is disappeared,, can make the left side rotor with salient pole continue to rotate along direction of rotation owing to existing active force and rotor self inertia between stator excitation salient pole in the dextral motor monomer and the rotor permanent magnetism salient pole; And produce dislocation, skew with the left side stator salient poles; This moment, import current in opposite in the stator exciting coil of motor monomer to the left again, make that sinistral motor monomer stator top salient pole is the N utmost point; Stator below salient pole is the S utmost point; Accomplished the commutation process of a stator salient poles magnet exciting coil like this, according to the law that like pole repels each other, sinistral motor monomer stator salient poles just begins to repel near the permanent magnetism salient pole of its external rotor with magnetic polarity; Formation is to the active force of external rotor, and promptly two of sinistral motor monomer external rotor permanent magnetism salient poles have received the double reaction plus that left side stator excitation salient pole " is pulled in front and others push behind ".Experience above-mentioned change procedure at the sinistral motor monomer; The dextral motor monomer is in the location status shown in accompanying drawing 3 under the setting sense of current; Dextral motor monomer stator field excitation salient pole produces " drawing the back before pushing away " active force over against the external rotor permanent magnet salient pole, both the rotor N salient pole in its place ahead is produced thrust like the N salient pole of stator right-hand member, and the N salient pole of right-hand member also produces pulling force to its rear rotor S salient pole simultaneously; In like manner; The S salient pole of stator left end produces the active force of " drawing the back before pushing away " equally to rotor with salient pole, like this, and when stator exciting coil feeds corresponding excitation current; Will produce turning moment to rotor with salient pole, force rotor along rotation counterclockwise.Co-axially fixed sinistral motor monomer and dextral motor monomer continue alternately to form turning moment; Be reflected on the motor rotation axis; The compound torque of two motor that form, thus a continous-stable torque efficiently output on output rotation axis, just can be obtained.
In the present embodiment; Installation site transducer on the stator of sinistral motor monomer and rotor relevant position; The sense of current of this position transducer control left side stator exciting coil; And on the stator of dextral motor monomer and rotor relevant position the installation site transducer, the sense of current of this position transducer control right side stator exciting coil.Because left side stator excitation salient pole and right side field excitation salient pole shift to install; So when the sinistral motor monomer is in active force is zero position; The dextral motor monomer then is in the bigger position of turning effort power; Because the external rotor of both sides motor monomer is the coaxial rotation axis that is fixedly connected on, the active force of dextral motor monomer makes the sinistral motor monomer can pass through " zero application point " smoothly, gets into the state that active force increases gradually again.Stator excitation salient pole alternating action is in the external rotor permanent magnet salient pole in the and arranged on left and right sides motor monomer, thereby makes the rotation that rotor can be continual and steady, forms torque output, changes the conducting angle that feeds the magnet exciting coil exciting current, promptly can adjust rotating speed of motor.
Embodiment two:
Present embodiment axially connects institute by two motor monomer rotation axiss equally and constitutes, and each motor monomer is again that the external rotor by the stator of four field excitation salient poles and four permanent magnetism salient poles constitutes.Shown in accompanying drawing 4.
In the present embodiment, external rotor has adopted integrated easy structure, is about to two motor monomer external rotor permanent magnet salient poles and is fixed on same cylindric magnetic conductor inwall.The middle part of cylindric magnetic conductor 23 is fixedly connected with the discoid connecting plate 24 of non-magnetic conduction; The discoid connecting plate 24 of non-magnetic conduction is fixedly connected with motor rotation axis 27, and cylindric magnetic conductor 23 is divided into two cavitys by the discoid connecting plate 24 of non-magnetic conduction, shown in accompanying drawing 5; Directly over cylindric magnetic conductor 23 left ends with under be fixed with permanent magnet blocks respectively; The S salient pole of these two permanent magnet blocks points to rotation axis, is fixed with permanent magnet blocks under cylindric magnetic conductor 23 left ends, and the S salient pole of this permanent magnet blocks points to rotation axis; Positive left of cylindric magnetic conductor and the just right-hand permanent magnet blocks that is fixed with respectively, the N salient pole of these two permanent magnet blocks all points to rotation axis.Left side stator excitation salient pole is fixed on the right flank of left end cap 30; Left side stator excitation salient pole and right side field excitation salient pole all are to form four salient poles by " ten " font laminated core; Magnet exciting coil is around in the periphery of four salient poles of this laminated core; The coiling direction of magnet exciting coil should meet when magnet exciting coil feeds same directional current, and it is different to make adjacent two salient poles of four salient poles of stator excitation salient pole present magnetic polarity.Right side stator excitation salient pole is fixed in the left surface of right side end cap 28, and the shape of right side stator excitation salient pole is identical with structure with the shape of left side stator excitation salient pole with structure.Unique difference of left side stator excitation salient pole and right side stator excitation salient pole is; During assembling present embodiment motor; Make between left side stator excitation salient pole radial centre lines and the right side stator excitation salient pole radial centre lines to have the α angle, promptly differ the angle of 45 degree.Like accompanying drawing 5, shown in 6.
In the accompanying drawing 6, in rotor rotation process, formed the shortest magnetic circuit state of closure between rotor permanent magnetism salient pole in the dextral motor monomer and the stator excitation salient pole; Turn-off the stator exciting coil electric current of dextral motor monomer this moment; Interaction force between rotor permanent magnetism salient pole and the stator excitation salient pole is disappeared, owing to be in big force position (referring to accompanying drawing 5) between sinistral motor monomer rotor salient pole and the stator salient poles and, the right side rotor with salient pole rotated to direction of rotation this moment owing to rotating the inertia of rotor; Produce dislocation, skew with stator salient poles; This moment, position sensor output signal, and control excitation power supply; Make input current direction change on the stator exciting coil of right side; Make stator top salient pole and below salient pole be the S utmost point, make stator left and right-hand salient pole be the N utmost point simultaneously, accomplished the commutation process of a magnet exciting coil like this.According to the principle that the same sex is repelled each other, four field excitation salient poles of dextral motor monomer stator just begin to repel rotor permanent magnetism salient pole, form the thrust to rotor, also different in nature permanent magnetism salient pole on the rotor are produced pulling force simultaneously.When the dextral motor monomer experiences above-mentioned change procedure; The sinistral motor monomer is in the location status shown in accompanying drawing 5; Under the state of setting the exciting current direction; The stator excitation salient pole is in rotor permanent magnetism salient pole is produced " drawing the back before pushing away " active force, promptly " pushes away far " epitrochanterian the place ahead same sex magnetic salient pole, " furthering " epitrochanterian rear opposite sex magnetic salient pole.Like this, when stator exciting coil feeds corresponding excitation current, will produce turning moment, force rotor along rotation counterclockwise to rotor with salient pole.Co-axially fixed sinistral motor monomer and dextral motor monomer continue alternately to form turning moment, on rotation axis, form the rotation bimoment of two motors, thereby are reflected on the motor rotation axis, just can obtain the torque output that stability and high efficiency is continuous.
In the present embodiment, installation site transducer on stator and rotor relevant position, position transducer control left side stator exciting coil and right side stator exciting coil in time change the exciting current direction.Because the field excitation salient pole of and arranged on left and right sides motor monomer shifts to install; So when the sinistral motor monomer is in active force is zero position; The dextral motor monomer then is in the maximum position of active force; The active force of dextral motor monomer makes the sinistral motor monomer can pass through " zero application point " smoothly, gets into the state that active force increases gradually.Stator excitation salient pole alternating action is in rotor with salient pole in the and arranged on left and right sides motor monomer, thereby makes the rotation that rotor can be continual and steady, forms torque output.
Because stator has adopted four field excitation salient pole structures in the present embodiment, can obtain bigger and the output of torque more stably, change the angle of flow that feeds the magnet exciting coil exciting current and promptly can adjust rotating speed of motor.
Embodiment three:
Present embodiment axially connects institute by three motor monomer rotation axiss and constitutes, and each motor monomer is again that the external rotor by the stator of four field excitation salient poles and four permanent magnetism salient poles constitutes.The present embodiment design feature is on the foregoing description two bases, increases a motor monomer again, forms the external rotor permanent magnet motor of three-decker, and its structure is analysed and observe shown in accompanying drawing 7.
Cylindric magnetic conductor 45 is fixedly connected with rotation axis 52 through disc connecting plate 46, and eight permanent magnet blocks are divided into two groups, are fixed on the upper and lower, left and right side of cylindric magnetic conductor 45 two ends inwalls respectively, (referring to accompanying drawing 8) symmetrical equilibrium.Left side stator excitation salient pole 43 is fixed on the right flank of left end cap 40; The intermediate stator field excitation salient pole is fixed on the left surface of stator seat 48; Stator seat 48 has also played the effect of right end cap; Right side stator excitation salient pole is fixed on the left surface of stator seat 48, and four permanent magnet blocks 51 are fixed on upper and lower, left and right side's (referring to accompanying drawing 10) of bowl-shape magnetic conductor 49 inwalls respectively symmetrical equilibrium, and to attend position, the magnetic polarity of institute's fixed permanent magnet piece all consistent with cylindric magnetic conductor.Bowl-shape magnetic conductor 49 is fixedly connected with rotation axis 52.Three the stator excitation salient poles in left, center, right align with left, center, right three rotor permanent magnetism salient pole axial space position strictness, to reduce leakage field.
In the present embodiment; The angle that has 30 degree between left side stator excitation salient pole radial centre lines and the intermediate stator field excitation salient pole radial centre lines; Be α angle (referring to accompanying drawing 8 and accompanying drawing 9); And the angle of existence 60 degree between right side stator excitation salient pole radial centre lines and the left side stator excitation salient pole radial centre lines; 2 α angles, the angle of existence 30 degree, i.e. α (referring to accompanying drawing 8, accompanying drawing 9 and accompanying drawing 10) between right side stator excitation salient pole radial centre lines and the intermediate stator field excitation salient pole radial centre lines; Stator excitation salient pole radial centre lines has the angle of 30 degree each other successively in three motor monomers, just forms when this is assembling motor and fixing.
The interactively of stator excitation salient pole and rotor with salient pole is with embodiment two in the present embodiment; Just through increasing one deck motor monomer; This makes 90 degree step angles of single motor monomer " four pairs four " structure be subdivided into 30 degree; Thereby it is more steady to have reached motor operation, the bigger purpose of design of output torque.
In the present embodiment, each layer motor monomer is respectively arranged with position transducer, on the position the when position transducer of each layer is separately positioned on and aligns corresponding to the stator of each layer and rotor magnetic salient pole.Promptly when having stator salient poles to align in certain layer of motor monomer with rotor with salient pole; This layer position transducer then exported signal; Excitation control power supply collects the parameter signals such as location status, rotating speed and direction of rotation of each layer position transducer, the exciting current direction and the operating condition of each layer of closed-loop control motor monomer respectively.
Claims (5)
1. multilayer coupling type external rotor permanent magnet brushless motor, its formation includes external rotor, stator, rotation axis and motor field frame, it is characterized in that:
This motor is made up of two above external rotor permanent magnet brushless motor monomers, and each motor monomer external rotor is fixedly connected on the same rotation axis of this motor;
The external rotor of said motor monomer is made up of cylindric magnetic conductor and even number permanent magnet blocks; Permanent magnet blocks is arranged on cylindric magnetic conductor inwall symmetrically and forms the permanent magnetism salient pole; The unidirectional magnetic polarity of adjacent permanent magnetism salient pole is different; Cylindric magnetic conductor is fixedly connected with rotation axis through non-magnetic conduction support
The stator of said motor monomer is made up of stator seat and even number field excitation salient pole; Field excitation salient pole is arranged on the periphery of stator seat symmetrically; Field excitation salient pole constitutes by laminated core with around the peripheral magnet exciting coil of this laminated core; When in the magnet exciting coil during at the same sense of current; The magnetic polarity of adjacent field excitation salient pole is different, and the angle of adjacent field excitation salient pole radial centre lines equates with the angle of the adjacent permanent magnetism salient pole of same motor monomer rotor radial centre lines, and the axial dimension of stator excitation salient pole is identical with the axial dimension of rotor permanent magnetism salient pole;
It is identical that the permanent magnetism salient pole is arranged at cylindric magnetic conductor inwall radial distribution position on the rotor of said each motor monomer; And the magnetic polarity of same radial position permanent magnetism salient pole is identical; And be the magnetic isolation between the field excitation salient pole of each motor monomer stator each other, there is angular difference between the field excitation salient pole radial centre lines of each motor monomer stator.
2. a kind of multilayer coupling type external rotor permanent magnet brushless motor according to claim 1 is characterized in that:
This motor is made up of two motor monomers, and each motor monomer constitutes by the external rotor of two permanent magnetism salient poles and the stator of two field excitation salient poles, and two motor monomer external rotors all are fixedly connected with rotation axis;
This motor external rotor is made up of a cylindric magnetic conductor and four permanent magnet blocks; Two permanent magnet blocks are arranged on the top of cylindric magnetic conductor two ends inwall; And these two permanent magnet blocks are on same the axis; The N polarity salient pole of these two permanent magnet blocks points to rotation axis, and two other permanent magnet blocks is arranged on the below of cylindric magnetic conductor two ends inwall, and these two permanent magnet blocks are on same the axis; The S polarity salient pole of these two permanent magnet blocks points to rotation axis, and relative with the N polarity salient pole of cylindric magnetic conductor two ends inwall top;
The disc connecting plate outer rim of a non-magnetic conduction and cylindric magnetic conductor middle part inwall fix, and this disc connecting plate center and rotating spindle are fixed, and the disc connecting plate is divided into two spaces with cylindric magnetic conductor;
This motor stator is made up of left end cap and left field excitation salient pole and right end cap and right field excitation salient pole; Left side field excitation salient pole is identical with right field excitation salient pole structure; All be to constitute by " worker " font laminated core and two magnet exciting coils that are positioned at the rotating shaft both sides around the iron core periphery; Left side field excitation salient pole forms two magnetic salient poles; Right field excitation salient pole also forms two magnetic salient poles, and left field excitation salient pole is fixed in the right flank of left end cap, and right field excitation salient pole is fixed in the left surface of right end cap; Left end cap and right end cap be the left end and the right-hand member of fixed motor housing respectively; Left field excitation salient pole is in the external rotor left end permanent magnet salient pole formed rotation dignity of when rotation, when making right field excitation salient pole be in the rotation of external rotor right-hand member permanent magnet salient pole in the formed rotation dignity, and has differential seat angle 90 degree between the radial centre lines of the radial centre lines of left field excitation salient pole and right field excitation salient pole; Be the magnetic isolation between left side field excitation salient pole and the right field excitation salient pole; Two magnet exciting coil serial or parallel connections of left side field excitation salient pole, two magnet exciting coil serial or parallel connections of right field excitation salient pole, two inputs and two inputs of right field excitation salient pole magnet exciting coil with left field excitation salient pole magnet exciting coil are connected to excitation control power supply respectively again.
3. a kind of multilayer coupling type external rotor permanent magnet brushless motor according to claim 1 is characterized in that:
This motor is made up of two motor monomers, and each motor monomer constitutes by the external rotor of four permanent magnetism salient poles and the stator of four field excitation salient poles, and two motor monomer external rotors all are fixedly connected with rotation axis;
This motor external rotor is made up of a cylindric magnetic conductor and eight permanent magnet blocks; Two permanent magnet blocks are arranged on the top of cylindric magnetic conductor two ends inwall; And these two permanent magnet blocks are on same the axis, and the S polarity salient pole of these two permanent magnet blocks points to rotation axis, and two permanent magnet blocks are arranged on the below of cylindric magnetic conductor two ends inwall; And these two permanent magnet blocks are on same the axis; The S polarity salient pole of these two permanent magnet blocks points to rotation axis, and two permanent magnet blocks are arranged on the left of cylindric magnetic conductor two ends inwall, and these two permanent magnet blocks are on same the axis; The N polarity salient pole of these two permanent magnet blocks points to rotation axis; Two permanent magnet blocks are arranged on the right-hand of cylindric magnetic conductor two ends inwall, and these two permanent magnet blocks are on same the axis N polarity salient pole sensing rotation axis of these two permanent magnet blocks;
The disc connecting plate outer rim of a non-magnetic conduction and cylindric magnetic conductor middle part inwall fix, and this disc connecting plate center and rotation axis are fixed, and the disc connecting plate is divided into two spaces with cylindric magnetic conductor;
This motor stator is made up of left end cap and left field excitation salient pole and right end cap and right field excitation salient pole; Left side field excitation salient pole is identical with right field excitation salient pole structure; All be to constitute by " ten " word shape laminated core with around four peripheral magnet exciting coils of this laminated core, left field excitation salient pole and right field excitation salient pole respectively form four magnetic salient poles, and left field excitation salient pole is fixed in the right flank of left end cap; Right field excitation salient pole is fixed in the left surface of right end cap; Left end cap and right end cap be the left end and the right-hand member of fixed motor housing respectively, when making left field excitation salient pole be in the rotation of external rotor left end permanent magnetism salient pole in the formed rotation dignity, when making right field excitation salient pole be in the rotation of external rotor right-hand member permanent magnetism salient pole in the formed rotation dignity; And left field excitation salient pole radial centre lines and right field excitation salient pole radial centre lines differ 45 degree; Be the magnetic isolation between a left side field excitation salient pole and the right field excitation salient pole, four magnet exciting coils of left field excitation salient pole or serial or parallel connection are merged into two inputs; The coiling direction of four magnet exciting coils of left side field excitation salient pole makes when magnet exciting coil feeds same direction exciting current; Can make that the magnetic polarity of adjacent salient pole of left field excitation salient pole is opposite, same, four magnet exciting coils of right field excitation salient pole or serial or parallel connection; Merge into two inputs; The coiling direction of four magnet exciting coils of right field excitation salient pole makes when magnet exciting coil feeds same direction exciting current, can make that the magnetic polarity of adjacent salient pole of right field excitation salient pole is opposite, and two inputs of magnet exciting coil of two inputs of magnet exciting coil of left field excitation salient pole and right field excitation salient pole are connected to excitation respectively and control power supply.
4. a kind of multilayer coupling type external rotor permanent magnet brushless motor according to claim 1 is characterized in that:
This motor is made up of three motor monomers, and each motor monomer constitutes by the external rotor of four permanent magnetism salient poles and the stator of four field excitation salient poles, and three motor monomer external rotors all are fixedly connected with rotation axis;
This motor external rotor is divided into left and right two parts; The left half external rotor is made up of a cylindric magnetic conductor and eight permanent magnet blocks, and two permanent magnet blocks are arranged on the top of cylindric magnetic conductor two ends inwall, and these two permanent magnet blocks are on same the axis; The S polarity salient pole of these two permanent magnet blocks points to rotation axis; Two permanent magnet blocks are arranged on the below of cylindric magnetic conductor two ends inwall, and these two permanent magnet blocks are on same the axis S polarity salient pole sensing rotation axis of these two permanent magnet blocks; Two permanent magnet blocks are arranged on the left of cylindric magnetic conductor two ends inwall; And these two permanent magnet blocks are on same the axis, and the N polarity salient pole of these two permanent magnet blocks points to rotation axis, and two permanent magnet blocks are arranged on the right-hand of cylindric magnetic conductor two ends inwall; And these two permanent magnet blocks are on same the axis, and the N polarity salient pole of these two permanent magnet blocks points to rotation axis; The right half external rotor is made up of a bowl-shape magnetic conductor and four permanent magnet blocks; One of them permanent magnet blocks is arranged on the top of bowl-shape magnetic conductor inwall; The S polarity salient pole of this piece permanent magnet blocks points to rotation axis, and one of them permanent magnet blocks is arranged on the below of bowl-shape magnetic conductor inwall, and the S utmost point protrusion of this piece permanent magnet blocks points to rotation axis; One of them permanent magnet blocks is arranged on the left of bowl-shape magnetic conductor inwall; The N polarity salient pole of this piece permanent magnet blocks points to rotation axis, and one of them permanent magnet blocks is arranged on the right-hand of bowl-shape magnetic conductor inwall, and the S polarity salient pole of this piece permanent magnet blocks points to rotation axis;
The disc connecting plate outer rim of a non-magnetic conduction and cylindric magnetic conductor middle part inwall fix, and this disc connecting plate center and rotation axis are fixed, and the rotating shaft center place of bowl-shape magnetic conductor is fixedly connected with rotation axis;
This motor stator is made up of left end cap, stator seat and left field excitation salient pole, middle field excitation salient pole and right field excitation salient pole; Left side field excitation salient pole, middle field excitation salient pole and right field excitation salient pole are constructed identical; All be to constitute by " ten " word shape laminated core with around four peripheral magnet exciting coils of this laminated core, left field excitation salient pole, middle field excitation salient pole and right field excitation salient pole respectively form four magnetic salient poles, and left field excitation salient pole is fixed in the right flank of left end cap; Middle field excitation salient pole is fixed in the left surface of stator seat; Right field excitation salient pole is fixed in the right flank of stator seat, and left end cap is fixedly connected with the left end of motor field frame, and stator seat is fixedly connected with the right-hand member of motor field frame; When making left field excitation salient pole be in the rotation of cylindric magnetic conductor left end permanent magnetism salient pole in the formed rotation dignity; When making field excitation salient pole be in the rotation of cylindric magnetic conductor right-hand member permanent magnetism salient pole in the formed rotation dignity, when making right field excitation salient pole be on the bowl-shape magnetic conductor inwall rotation of permanent magnetism salient pole in the formed rotation dignity, and make between left field excitation salient pole radial centre lines and the middle field excitation salient pole radial centre lines and differ 30 degree; Right field excitation salient pole radial centre lines and middle field excitation salient pole radial centre lines also differ 30 degree; Right field excitation salient pole radial centre lines and left field excitation salient pole radial centre lines then differ 60 degree, are the magnetic isolation each other between left field excitation salient pole, middle field excitation salient pole and the right field excitation salient pole three, four magnet exciting coils of left field excitation salient pole or serial or parallel connection; Merge into two inputs; The coiling direction of four magnet exciting coils of left side field excitation salient pole makes when magnet exciting coil feeds same direction exciting current, can make that the magnetic polarity of adjacent salient pole of left field excitation salient pole is opposite, equally; In four magnet exciting coils or the serial or parallel connection of field excitation salient pole; Merge into two inputs, the coiling direction of four magnet exciting coils of middle field excitation salient pole makes when magnet exciting coil feeds same direction exciting current, can make that the magnetic polarity of adjacent salient pole of middle field excitation salient pole is opposite; Equally; Four magnet exciting coils of right field excitation salient pole or serial or parallel connection are merged into two inputs, and the coiling direction of four magnet exciting coils of right field excitation salient pole makes when magnet exciting coil feeds same direction exciting current; Can make that the magnetic polarity of adjacent salient pole of right field excitation salient pole is opposite, two inputs of two inputs of magnet exciting coil of left field excitation salient pole and the magnet exciting coil of middle field excitation salient pole and two inputs of magnet exciting coil of right field excitation salient pole are connected to excitation control power supply respectively.
5. according to claim 1 or 2 or 3 or 4 described a kind of multilayer coupling type external rotor permanent magnet brushless motors; It is characterized in that: be provided with position transducer with external rotor on the stator of said each motor monomer, on the position when each position transducer is separately positioned on and aligns corresponding to the stator excitation salient pole of each motor monomer and rotor permanent magnetism salient pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201629883U CN202153696U (en) | 2011-05-20 | 2011-05-20 | Multilayer connecting shaft type external rotor permanent magnetism brushless motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201629883U CN202153696U (en) | 2011-05-20 | 2011-05-20 | Multilayer connecting shaft type external rotor permanent magnetism brushless motor |
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| Publication Number | Publication Date |
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| CN202153696U true CN202153696U (en) | 2012-02-29 |
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| CN2011201629883U Expired - Fee Related CN202153696U (en) | 2011-05-20 | 2011-05-20 | Multilayer connecting shaft type external rotor permanent magnetism brushless motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102195422A (en) * | 2011-05-20 | 2011-09-21 | 戴珊珊 | Multilayer coupling type external rotor permanent magnet brushless motor |
| CN109802542A (en) * | 2019-01-08 | 2019-05-24 | 南京一体科技有限公司 | A kind of outer rotor desk permanent-magnet switched reluctance motor |
-
2011
- 2011-05-20 CN CN2011201629883U patent/CN202153696U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102195422A (en) * | 2011-05-20 | 2011-09-21 | 戴珊珊 | Multilayer coupling type external rotor permanent magnet brushless motor |
| CN109802542A (en) * | 2019-01-08 | 2019-05-24 | 南京一体科技有限公司 | A kind of outer rotor desk permanent-magnet switched reluctance motor |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120229 Termination date: 20140520 |