CN102064657B - Permanent-magnet variable-speed hub motor with complementing excitation rotor - Google Patents
Permanent-magnet variable-speed hub motor with complementing excitation rotor Download PDFInfo
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- CN102064657B CN102064657B CN2010105564765A CN201010556476A CN102064657B CN 102064657 B CN102064657 B CN 102064657B CN 2010105564765 A CN2010105564765 A CN 2010105564765A CN 201010556476 A CN201010556476 A CN 201010556476A CN 102064657 B CN102064657 B CN 102064657B
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Abstract
The invention relates to a permanent-magnet variable-speed hub motor with a complementing excitation rotor. Two groups of excitation magnetic sources of which the polarities complement are arranged at the inner rotor surface of a hub, a main magnetic flux source excitation body and an auxiliary magnetic flux source excitation body are respectively configured with alternate polarities by a plurality of permanent magnets in a rotor yoke to form an annular shape which takes a stator shaft as the center, a polar distance is staggered between the peripheral polarity distributions of the auxiliary magnetic flux source excitation body and the main magnetic flux source excitation body, a stator and the stator shaft are matched via a spline to form a stator which can move axially, and a plurality of rollers which push the stator shaft to move axially through an eccentric exercise are arranged between a track plate arranged in a left end cover of the hub and a push disc arranged on the stator, so that the magnetic flux is reduced due to the axial motion of the stator to change the torque-rotating speed properties of the motor and realize speed changing. According to the invention, Not only can the mechanical properties of the permanent-magnet variable-speed hub motor per se be improved, but also the full power speed regulating ranges of the permanent-magnet variable-speed hub motor can be increased, meanwhile, the motor size is not increased, and the production cost is saved.
Description
Technical field
The present invention relates to a kind of permanent magnetic brushless, relating to a kind of a kind of rotor for the design of driving motor vehicle specifically is the permanent-magnet variable-speed wheel hub motor of complementary excitation.
Background technology
The permanent magnetic brushless that is used for the electric two-wheel vehicle power set of prior art normally adopts the wheel hub motor of low speed, and it has saved machine driving, need not to lubricate, and low noise, non-maintaining, used widely in the electric two-wheel vehicle field.But the wheel hub motor of this low speed is because of the mechanical property reason of himself, can only the reduction of speed speed governing, and can not the speed governing of permanent power speedup, poor in the practical application climbing capacity, speed is also carried not high.The mechanical property of motor is meant the moment of torsion of motor output and the functional relation of rotating speed, and accompanying drawing 7 is mechanical properties of existing 1.1 kilowatts of permanent magnetic brushless, has the torsion of 20Nm and 500 rev/mins rotating speed.Though magneto itself has permanent torque characteristics, does not have constant output characteristic, owing to use permanent magnet excitation; Motor magnetic flux is difficult to adjustment, so the total power speed adjustable range is narrow, when being used for vehicle traction; Because of the working conditions change scope of vehicle ' is big, just cause this motor to need the more power deposit, volume increases; Complex structure, this is very uneconomic.In order to address this problem, people have attempted many methods, and up to the present, the method for head it off mainly contains three kinds:
1, motor has no variation; In order to improve motor properties; Adopt high-speed electric expreess locomotive to add mechanical reduction system or shift system; Mechanical type gear (comprising many grades of speed changes or electrodeless variable-speed) promptly is set outside motor, utilizes speed changer to come expanding governing, remedy the narrow deficiency of this motor total power speed adjustable range with this.This mode must adopt mechanical gearbox, clutch etc., the headstock complex structure of cause vehicles, and volume is big, and cost is high.Accompanying drawing 8 is to have increased a top gear after above-mentioned 1.1 kilowatt motors use the external mechanical speed change, and rotating speed has increased by 1 times, but characteristic is discontinuous, exists during speed change and impacts or power interruption.
2, adopt the weak-magnetic speed-regulating technology
The motor characteristic that desirable vehicle traction needs is to have permanent moment of torsion output characteristic during low speed and have constant power output characteristic more than the rated speed.Magneto itself has permanent torque characteristics and does not have constant output characteristic.Because constant output characteristic need be realized through reducing magnetic flux, be called weak-magnetic speed-regulating in the industry.Simple declaration is following:
The maximum speed of permanent magnetic brushless is that no-load speed is determined by following formula
Wherein except that air gap magnetic flux Φ, Δ U can ignore for the switching device pressure drop, and all the other are rated voltage U, and parameter W, K, P etc. are constant, confirms during design.Only if therefore regulate (reducing) air-gap flux amount Φ, otherwise rotating speed of motor can not improve just.If reduce the magnetic flux of air gap, rotating speed will increase by inverse ratio curve.
On the other hand, because the torque of brushless electric machine is directly proportional with magnetic flux Φ.
Wherein W, K, P, etc. be parameter identical in the rotating speed formula.Therefore reduce the air-gap flux amount, the moment of torsion decline that is directly proportional.
Because being the product by rotating speed and moment of torsion, the power output Pw of motor determines
Pw=0.105?T*n
So the result of weak magnetic does not change the power of motor, but can keep improving rotating speed of motor to greatest extent under the constant basically situation of power.
But present weak-magnetic speed-regulating adopts automatically controlled weak magnetic technology usually; This automatically controlled weak magnetic technology is through in controller, controlling electrical power phase place (vector control) with program command; Generation weakens main flux φ with the mode of main flux magnetic-field component in the opposite direction, thereby improves rotating speed of motor.This technology is used for the embedded brushless, permanently synchronous machine of magnetic pole more, as when being used for common non-salient pole permanent magnet brushless electric machine, the big and weak magnetic weak effect of direct axis component current drain, its technique effect is limited.And be attached to the external rotor wheel hub motor on surface for magnetic patch, with the weak magnetic of electronic controller, current drain is big, volume is big, cost of manufacture increases, the production cost that certainly will increase enterprise with add large user's financial burden, reality be do not appreciate mistake.And the cold-resistant heat resistance of electronic controller a little less than, under cold and hot different environment, work and break down easily.
3, connect through the conversion winding, adopt composite rotors and the method that changes magnetic flux path.Owing to adopt the electric machine structure of this method complicated, cause factors such as cost increase, its technique effect equally can not be satisfactory.
The mechanical property of permanent-magnet variable-speed wheel hub motor self is improved, the total power speed adjustable range of permanent-magnet variable-speed wheel hub motor is increased, be the insoluble problem in this area always.
Summary of the invention
The objective of the invention is deficiency to the prior art existence; It is the permanent-magnet variable-speed wheel hub motor of complementary excitation that a kind of rotor is provided, and it is through being arranged side by side the complementary excitation magnetic source of two groups of polarity in the rotor yoke of wheel hub, and stator is moved vertically reduce magnetic flux; Change the moment of torsion-rotary speed property of motor; Realize speed change, the mechanical property of permanent-magnet variable-speed wheel hub motor self is improved, the total power speed adjustable range of permanent-magnet variable-speed wheel hub motor is increased; Simultaneously do not increase motor volume again, save production cost.
The objective of the invention is to realize like this: comprise wheel hub, be fixed on circle in the wheel hub rotor yoke; And the stator that is arranged in the rotor yoke circle, the interior circle of said rotor yoke is provided with the excitation magnetic source, and the circumference of said stator is provided with winding; Between the iron core of winding and the excitation magnetic source air gap is arranged; Be respectively equipped with bearing on the two ends shaft part of stator axis, in stator axis, said excitation magnetic source is the complementary excitation magnetic sources of two groups of polarity to the end cap of wheel hub right ends through bearings; Wherein one group is main flux source excitation body; Another group is secondary sources of magnetic flux excitation body, and major and minor sources of magnetic flux excitation body is arranged side by side in rotor yoke, and the axial length of main flux source excitation body is greater than the axial length of secondary sources of magnetic flux excitation body; Be provided with gap at interval between the major and minor sources of magnetic flux excitation body; It is the annular at center that said main flux source excitation body, secondary sources of magnetic flux excitation body are made up of in rotor yoke with the stator axis polylith permanent magnet polarity alternate configurations respectively, and the permanent magnet quantity of major and minor sources of magnetic flux excitation body is identical, and pole span length is identical; The pole span that staggers that secondary sources of magnetic flux excitation body circumference polarity distributes and main flux source excitation body circumference polarity distributes makes polarity axially corresponding between the major and minor sources of magnetic flux excitation body opposite; Said stator and stator axis form through spline fitted can axially movable stator; Leaning in the main flux source excitation body left end cap on one side of said wheel hub is provided with track plate; The axial end that stator is corresponding with left end cap is provided with a push-plate, is provided with a plurality of rollers that move through centrifugal motion promotion stator shaft orientation between track plate and the push-plate, and the axial end that stator is corresponding with right end cap is provided with return spring; Make wheel hub when inactive state, stator is in the position of corresponding main flux source excitation body.
Said main flux source excitation axon is that secondary sources of magnetic flux excitation axon is to more than 2 times or 2 times of length to length.
The axial length of said main flux source excitation body is identical with the axial length of winding iron core.
The spacing in gap is 2～4 times of air-gap separation between the major and minor sources of magnetic flux excitation body.
The spline fitted of stator and stator axis adopts ball spline; This ball spline is by being located at inner spline housing on the stator, being located at splined shaft section on the stator axis, being used to make the plurality of balls of inner spline housing and splined shaft section engagement to form; The spline of inner spline housing and splined shaft section is axially extended arc groove; Plurality of balls is arranged in the arc groove between inner spline housing and splined shaft section, and the splined shaft section on the stator axis has the axially movable degree of freedom of inner spline housing.
Push-plate is connected with stator or inner spline housing through thrust bearing, can rotate with respect to stator or inner spline housing.
Said push-plate is the inclined plane disc chamber, makes between push-plate and the track plate and forms wedge shape space, and roller is arranged in this wedge shape space.
Said track plate is evenly equipped with and is radial to the channel suspending rail that radially extends, and the root of each channel suspending rail is provided with the depression of holding roller.
Said return spring sky is enclosed within on the stator axis, and an end of return spring is limited in stator, and the other end is limited in the postive stop baffle that is provided with on the stator axis.
One be used for position sensing magneto-dependent sensor be installed in stator axis, corresponding with the magnet ring that is provided with on the wheel hub right end cap.
Owing to adopted such scheme, the present invention to have following characteristics:
1. through in the rotor yoke of wheel hub, being arranged side by side the complementary excitation magnetic source of two groups of polarity; Wherein one group is main flux source excitation body; Another group is secondary sources of magnetic flux excitation body; The axial length of main flux source excitation body is greater than the axial length of secondary sources of magnetic flux excitation body, is provided with gap at interval between the major and minor sources of magnetic flux excitation body, and said main flux source excitation body, secondary sources of magnetic flux excitation body is made up of in rotor yoke with the stator axis polylith permanent magnet polarity alternate configurations respectively is the annular at center; The permanent magnet quantity of major and minor sources of magnetic flux excitation body is identical; Pole span length is identical, and the pole span that staggers that secondary sources of magnetic flux excitation body circumference polarity distributes and main flux source excitation body circumference polarity distributes makes polarity axially corresponding between the major and minor sources of magnetic flux excitation body opposite; And stator is connected cooperation formation through ball spline with stator axis can axially movable stator.In the machine operation process, the excitation body moves to secondary sources of magnetic flux excitation body direction stator from the main flux source vertically like this, and the iron core that drives winding moves in the same way; At this moment the magnetic flux of air gap begins to change, and the length of breath under the excitation body of main flux source reduces, and the length under opposite polarity secondary sources of magnetic flux excitation body increases; Along with stator moves gradually; The air-gap flux amount reduces gradually, and rotating speed of motor also improves gradually, realizes the speed governing of permanent-magnet variable-speed wheel hub motor thus.
2. said stator and stator axis be through spline fitted, and to adopt ball spline be the transmission that stator moves, and the frictional force that stator shaft orientation is moved is minimum, moves easily, in transfer torque power, can guarantee torque---the continuous variation of rotary speed property.
3. leaning in the main flux source excitation body left end cap on one side of said wheel hub is provided with track plate; The axial end that stator is corresponding with left end cap is provided with a push-plate; Be provided with a plurality of rollers that move through centrifugal motion promotion stator shaft orientation between track plate and the push-plate; The axial end that stator is corresponding with right end cap is provided with return spring, makes wheel hub when inactive state, and stator is in the position of corresponding main flux source excitation body.Like this when motor windings get electric after, form magnetic flux between winding iron core and the main flux source excitation body, rotor yoke rotates rapidly; And the wheel hub through linking together, end cap, track plate drive roller and rotate around stator axis, and after rotating speed reached set point, the centrifugal force of roller was greater than the elastic force of return spring; Roller carries out centrifugal motion along the wedge shape space between push-plate and the track plate; And the excitation body moves to secondary sources of magnetic flux excitation body direction from the main flux source along stator axis to promote push-plate drive stator, and the magnetic flux of air gap is changed, and reduces gradually; Rotating speed of motor also improves thereupon gradually, realizes speed governing.
One be used for position sensing semi-conductive magneto-dependent sensor be installed in stator axis, corresponding with the magnet ring that is provided with on the wheel hub right end cap, supply magneto-dependent sensor to pick up in order to produce the magnetic flux phase signal.Like this, the magneto-dependent sensor that is used for position sensing is installed in iron core not according to common structure, and is mounted on the lower stator axis of temperature, makes magneto-dependent sensor away from the temperature higher heat source, and the work of magneto-dependent sensor is more safe and reliable, longer service life.
Permanent-magnet variable-speed wheel hub motor of the present invention does not compared with prior art have exciting current consumption; Moment of torsion---speed characteristics are self-reacting to working conditions change; Because the ingenious original motor inner space that utilizes is provided with polarity complementary excitation magnetic source and centrifugal mechanism, and is simple and compact for structure; And through magnetic a little less than the mechanical movement realization of centrifugal mechanism, cold-resistant more heat-resisting more than magnetic system a little less than the electronics, reliable operation, sturdy and durable; Be specially adapted to the permanent-magnet variable-speed wheel hub motor of the big powered vehicle of working conditions change scope.
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Description of drawings
Fig. 1 is the structural representation of wheel hub motor of the present invention;
Fig. 2 is the sketch map under at a high speed weak magnetic state of wheel hub motor of the present invention;
Fig. 3 is the rotor yoke profile of wheel hub motor of the present invention;
Fig. 4 is the end view drawing of the rotor yoke of wheel hub motor of the present invention;
Fig. 5 is the rotor stereogram of wheel hub motor of the present invention;
Fig. 6 is the moment of torsion of the 1.1KW motor of employing structure of the present invention and the continuous variation relation of rotating speed;
Fig. 7 is the moment of torsion of existing 1.1KW motor and the relation of rotating speed;
Fig. 8 adopts the moment of torsion of external mechanical speed changer and the relation of rotating speed for existing 1.1KW motor.
In the accompanying drawing, 1 is roller, and 2 is push-plate, and 3 is track plate, and 4 is air gap, and 5 is rotor yoke, and 6 is wheel hub; 7 is main flux source excitation body, and 8 is the gap, and 9 is secondary sources of magnetic flux excitation body, and 10 is cable, and 11a is a left end cap, and 11b is a right end cap; 12 is bearing, and 13 is magnet ring, and 14 is magneto-dependent sensor, and 15 is return spring, and 16 is stator, and 17 is winding; 18 is stator axis, and 19 is ball, and 20 is inner spline housing, and 21 is thrust bearing, and 22 is postive stop baffle, and 23 are depression.
Embodiment
Fig. 1 is a structural representation of the present invention; Rotor be the permanent-magnet variable-speed wheel hub motor of complementary excitation comprise wheel hub 6, be fixed on circle in the wheel hub rotor yoke 5; And the stator 16 that is arranged in rotor yoke 5 circles, the interior circle of said rotor yoke 5 is provided with the excitation magnetic source, and the circumference of said stator 16 is provided with winding 17; Pass the hole of outgoing cable 10 on stator axis 18 of winding 17; Between the iron core of winding 17 and the excitation magnetic source air gap 4 is arranged, be respectively equipped with bearing 12 on the two ends shaft part of stator axis 18, the end cap of wheel hub 6 right ends is supported in stator axis 18 through bearing 12; Left and right end cap 11a, 11b pass through screw or/and key is circumferentially fixing with wheel hub 6 respectively, and end cap is rotated with wheel hub.Said excitation magnetic source is the complementary excitation magnetic sources of two groups of polarity; Wherein one group is main flux source excitation body 7; Another group is secondary sources of magnetic flux excitation body 9, and to being arranged side by side in rotor yoke 5, the axial length of main flux source excitation body 7 is greater than the axial length of secondary sources of magnetic flux excitation body 9 along hub spindle for major and minor sources of magnetic flux excitation body 7,9; The axial length of main flux source excitation body 7 is more than 2 times or 2 times of axial length of secondary sources of magnetic flux excitation body 9, generally is no more than 10 times; Be provided with gap 8 at interval between the major and minor sources of magnetic flux excitation body, the spacing in this gap 8 is 2～4 times of air gap 4 spacings; The axial length of said main flux source excitation body 7 is identical with the axial length of winding 17 iron cores.It is the annular at center that said main flux source excitation body 7, secondary sources of magnetic flux excitation body 9 constitute with stator axis 18 in rotor yoke 5 by polylith permanent magnet polarity alternate configurations respectively; The permanent magnet quantity of major and minor sources of magnetic flux excitation body is identical; Pole span τ length is identical; Secondary sources of magnetic flux excitation body circumference polarity distributes (as shown in Figure 4 with the pole span τ that staggers of main flux source excitation body circumference polarity distribution; Pole span τ refers to the centre-to-centre spacing of adjacent two opposite pole N-S or S-N, τ=girth/number of pole-pairs), make polarity axially corresponding between the major and minor sources of magnetic flux excitation body opposite; Be the S utmost point of permanent magnet on the extremely corresponding secondary sources of magnetic flux excitation body 9 of N of permanent magnet on the excitation body 7 of main flux source, the N utmost point (like Fig. 3, shown in Figure 5) of permanent magnet on the extremely corresponding secondary sources of magnetic flux excitation body 9 of the S of permanent magnet on the excitation body 7 of main flux source.Said stator 16 forms through spline fitted with stator axis 18 can axially movable stator.Stator 16 adopts ball spline with the spline fitted of stator axis 18; This ball spline is by being located at inner spline housing 20 on the stator 16, being located at splined shaft section on the stator axis 18, being used to make the plurality of balls 19 of inner spline housing and splined shaft section engagement to form; The spline of inner spline housing 20 and splined shaft section is axially extended arc groove; Plurality of balls 19 is between inner spline housing 20 and splined shaft section; Be arranged in the arc groove, the splined shaft section on the stator axis 18 has the inner spline housing 20 axially movable degrees of freedom.Said inner spline housing 20 can be with stator 16 and is the internal spline arc groove structure of being located at the stator circle center hole of one, also can be through being fixedly connected on the inner spline housing in the stator circle center hole.One push-plate 2 is connected with stator 16 or inner spline housing 20 through thrust bearing 21, and push-plate 2 can rotate with respect to stator 16 or inner spline housing 20.Push-plate 2 is arranged on stator 16 axial end corresponding with left end cap 11a, is connected with thrust bearing 21 through matching and fixing on the inner spline housing 20, and push-plate 2 is fixed or be full of matching and fixing and be connected on the thrust bearing 21 through screw or riveting.Leaning in the main flux source excitation body 7 left end cap 11a on one side of said wheel hub 6 is provided with track plate 3; Said track plate 3 is evenly equipped with and is radial to the channel suspending rail that radially extends; Be provided with a plurality of between track plate 3 and the push-plate 2 through centrifugal motion promotion stator 16 axially movable rollers 1; Said push-plate 2 is the bowl-shape push-plate in inclined plane disc chamber, makes between push-plate 2 and the track plate 3 and forms wedge shape space, and roller 1 is arranged in this wedge shape space.The root of each channel suspending rail of said track plate 3 is provided with the depression 23 of holding roller 1, and when motor quit work, each roller 1 was arranged in pairing depression 23.Said roller 1 can be the spheroidal roller, also can be cylindrical roller or barrel shaped roller, even adopts roller shape roller etc.; The shape of the depression 23 of each channel suspending rail root is according to the shaped design of roller 1; Can be ball-and-socket, also can arc groove, even can be cannelure around the center of circle; Make each roller 1 when centrifugal force does not reach design speed, can from residing depression, not move out.The axial end that said stator 16 is corresponding with right end cap 11b is provided with return spring 15; Return spring 15 skies are enclosed within on the stator axis 18; One end of return spring 15 is enclosed within inner spline housing 20 upper limits and is positioned at stator 16, and the other end is limited in the postive stop baffle 22 that is provided with on the stator axis 18.Make wheel hub 6 when inactive state, stator 16 is in the position of corresponding main flux source excitation body 7.One be used for position sensing magneto-dependent sensor 14 be installed in stator axis 18; The magnet ring 13 of going up setting with the right end cap 11b of wheel hub 6 is corresponding; Supply transducer to pick up in order to produce the magnetic flux phase signal; Said magnet ring 13 on number of pole-pairs and the phase place with wheel hub 6 on sources of magnetic flux excitation body definite relation is arranged, magnet ring 4 and the magneto-dependent sensor 14 common transducers that are used for the detection rotor magnetic field position of forming.Said magneto-dependent sensor 14 can adopt the transducer of Hall effect, also can adopt the magnetoresistive element of magneto resistance effect.Present embodiment adopt Hall effect the Hall integrated component, the postive stop baffle 22 of setting is fixedly connected on the circuit board 14a of Hall integrated component and the stator axis 18.
When wheel hub motor of the present invention is worked; Behind the electric motor starting; The magnetic flux interaction of winding current magnetic flux and main flux source excitation body produces electromagnetic force driving rotor yoke and rotates rapidly; And the wheel hub through linking together, end cap, track plate drive roller and rotate around stator axis, and push-plate is also along with rotation, and rotating speed improves rapidly.After rotating speed reached set point, the centrifugal force of roller was during greater than the elastic force of return spring, and roller moves out the depression of channel suspending rail on the track plate; And move along the circumferencial direction of channel suspending rail to track plate, the wedge shape space between push-plate and track plate carries out centrifugal motion, because the inclined plane disc chamber of bowl-shape push-plate receives roller pressure; Produce axial thrust load, and remove rotating torque through thrust bearing, push-plate passes to inner spline housing and stator with axial thrust load; The excitation body moves to secondary sources of magnetic flux excitation body direction from the main flux source along stator axis to promote stator; At this moment the magnetic flux of air gap begins to change, and the length of breath under the excitation body of main flux source reduces gradually, and the length under opposite polarity secondary sources of magnetic flux excitation body increases gradually; The magnetic flux of air gap is changed; Reduce to form weak magnetic gradually, rotating speed of motor also improves thereupon gradually, realizes weak-magnetic speed-regulating.Its principle is: setting the axial length that sub-winding iron core length vertically equals main flux source excitation body is L, and average magnetic is close to be B; Secondary sources of magnetic flux excitation axon is L ' to length, and polarity is opposite, and average magnetic is close to be (B); Displacement is Δ x, and polar moment is τ, extremely descends magnetic flux Φ that following relation is arranged:
φ=B·τ·（L-Δx）+（-B）·τ·Δx
=B·τ·（L-2Δx）
The rotating speed increase is a positive feedback process, that is:
Rotating speed rising → centrifugal force increase → axial thrust increase → stator displacement increase → magnetic flux minimizing → rotating speed raises ..., up to because the load resistance effect, the rotating speed height of not regenerating, when centrifugal force no longer increases, reach balance with spring force and frictional force till.
When increasing frictional force, rotating speed reduces, and the centrifugal force of roller reduces, and the thrust that push-plate gives stator also reduces thereupon, and to moved back, magnetic flux increases stator gradually under the effect of return spring, and the control rotating speed reduces.
After motor outage, magnetic flux disappears, and rotating speed reduces until wheel hub gradually and stops the rotation, and stator is return under the effect of return spring.
Referring to Fig. 6, be example with the permanent-magnet variable-speed wheel hub motor of 1.1KW, adopt structure of the present invention after; Its motor performance generation significant change: motor characteristic changes continuously; Moment of torsion, rotating speed respectively increase by 2 times, and 4 times of total raisings are equivalent to the performance of the common permanent magnetic brushless of 4.4KW.
Claims (10)
1. permanent-magnet variable-speed wheel hub motor that rotor is complementary excitation; Comprise wheel hub (6), be fixed on rotor yoke (5) round in the wheel hub; And the stator (16) that is arranged in rotor yoke (5) circle, the interior circle of said rotor yoke (5) is provided with the excitation magnetic source, and the circumference of said stator (16) is provided with winding (17); Air gap (4) is arranged between the iron core of winding (17) and the excitation magnetic source; Be respectively equipped with bearing (12) on the two ends shaft part of stator axis (18), the end cap of wheel hub (6) right ends is supported in stator axis (18) through bearing (12), it is characterized in that: said excitation magnetic source is the complementary excitation magnetic sources of two groups of polarity; Wherein one group is main flux source excitation body (7); Another group is secondary sources of magnetic flux excitation body (9), and major and minor sources of magnetic flux excitation body is arranged side by side in rotor yoke (5), and the axial length of main flux source excitation body (7) is greater than the axial length of secondary sources of magnetic flux excitation body (9); Be provided with gap (8) at interval between the major and minor sources of magnetic flux excitation body; It is the annular at center that said main flux source excitation body (7), secondary sources of magnetic flux excitation body are made up of with the stator axis in rotor yoke (5) polylith permanent magnet polarity alternate configurations respectively, and the permanent magnet quantity of major and minor sources of magnetic flux excitation body is identical, and pole span length is identical; Secondary sources of magnetic flux excitation body circumference polarity distributes and the main flux source excitation body circumference polarity pole span that staggers that distributes, and makes polarity axially corresponding between the major and minor sources of magnetic flux excitation body opposite; Said stator (16) and stator axis (18) can axially movable stators through spline fitted formation; Leaning in main flux source excitation body (7) left end cap (11a) on one side of said wheel hub is provided with track plate (3); Stator (16) axial end corresponding with left end cap is provided with a push-plate (2); Be provided with a plurality of between track plate (3) and the push-plate (2) through the centrifugal motion promotion axially movable roller of stator (16) (1); Stator (16) axial end corresponding with right end cap is provided with return spring (15), makes wheel hub (6) when inactive state, and stator (16) is in the position of corresponding main flux source excitation body (7).
2. the permanent-magnet variable-speed wheel hub motor that rotor according to claim 1 is complementary excitation is characterized in that: said main flux source excitation axon is that secondary sources of magnetic flux excitation axon is to more than 2 times or 2 times of length to length.
3. the permanent-magnet variable-speed wheel hub motor that rotor according to claim 1 and 2 is complementary excitation is characterized in that: the axial length of said main flux source excitation body (7) is identical with the axial length of winding (17) iron core.
4. the permanent-magnet variable-speed wheel hub motor that rotor according to claim 1 is complementary excitation is characterized in that: the spacing in gap (8) is 2～4 times of air gap (4) spacing between the major and minor sources of magnetic flux excitation body.
5. the permanent-magnet variable-speed wheel hub motor that rotor according to claim 1 is complementary excitation; It is characterized in that: the spline fitted of stator and stator axis adopts ball spline; This ball spline is by being located at inner spline housing on the stator, being located at splined shaft section on the stator axis, being used to make the plurality of balls of inner spline housing and splined shaft section engagement to form; The spline of inner spline housing and splined shaft section is axially extended arc groove; Plurality of balls is arranged in the arc groove between inner spline housing and splined shaft section, and the splined shaft section on the stator axis has the axially movable degree of freedom of inner spline housing (20).
6. the permanent-magnet variable-speed wheel hub motor that rotor according to claim 5 is complementary excitation is characterized in that: push-plate (2) is connected with stator or inner spline housing (20) through thrust bearing (21), can rotate with respect to stator or inner spline housing.
7. the permanent-magnet variable-speed wheel hub motor that rotor according to claim 1 is complementary excitation is characterized in that: said push-plate (2) is the inclined plane disc chamber, makes and forms wedge shape space between push-plate (2) and the track plate (3), and roller (1) is arranged in this wedge shape space.
8. the permanent-magnet variable-speed wheel hub motor that rotor according to claim 1 is complementary excitation is characterized in that: said track plate (3) is evenly equipped with and is radial to the channel suspending rail that radially extends, and the root of each channel suspending rail is provided with the depression (23) of holding roller.
9. the permanent-magnet variable-speed wheel hub motor that rotor according to claim 1 is complementary excitation; It is characterized in that: said return spring (15) sky is enclosed within on the stator axis (18); One end of return spring (15) is limited in stator, and the other end is limited in stator axis (18) and goes up the postive stop baffle (22) that is provided with.
10. be the permanent-magnet variable-speed wheel hub motor of complementary excitation according to claim 1 or 9 described rotors; It is characterized in that: one be used for position sensing magneto-dependent sensor (14) be installed in stator axis (18), the magnet ring (13) that go up to be provided with wheel hub right end cap (11b) is corresponding.
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| CN103633799B (en) * | 2012-08-29 | 2017-11-03 | 杨世国 | A kind of automatic continuous speed transforming pm brushless in-wheel motor |
| CN106696684B (en) * | 2017-02-01 | 2024-04-19 | 中信戴卡股份有限公司 | Driving mechanism of passenger vehicle |
| CN110206358B (en) * | 2019-04-25 | 2020-10-30 | 汪怡岑 | Wheel hub motor driven stereo garage moves structure from north to south |
| CN110729850B (en) * | 2019-10-23 | 2020-12-18 | 张开荣 | Automatic variable resistance type generator |
| CN110729867B (en) * | 2019-10-23 | 2021-02-09 | 江苏兴华昌发电设备有限公司 | Generator flux adjustment assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6943478B2 (en) * | 2003-11-14 | 2005-09-13 | Dura-Trac Motors, Inc. | Brushless permanent magnet wheel motor with variable axial rotor/stator alignment |
| CN101789735A (en) * | 2010-03-23 | 2010-07-28 | 杨荷 | Integrated self-adaptive flux shunt speed multiplying method of permanent magnet brushless motor |
| CN101795031A (en) * | 2010-03-23 | 2010-08-04 | 杨荷 | Permanent magnetic brushless speed-changing motor for electric vehicle and method thereof |
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2010
- 2010-11-24 CN CN2010105564765A patent/CN102064657B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6943478B2 (en) * | 2003-11-14 | 2005-09-13 | Dura-Trac Motors, Inc. | Brushless permanent magnet wheel motor with variable axial rotor/stator alignment |
| CN101789735A (en) * | 2010-03-23 | 2010-07-28 | 杨荷 | Integrated self-adaptive flux shunt speed multiplying method of permanent magnet brushless motor |
| CN101795031A (en) * | 2010-03-23 | 2010-08-04 | 杨荷 | Permanent magnetic brushless speed-changing motor for electric vehicle and method thereof |
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| CN102064657A (en) | 2011-05-18 |
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