CN104377917A - Radial-axial magnetic field electromagnetic planetary gear power divider - Google Patents

Abstract

The invention belongs to the field of automobile motors, discloses a radial-axial magnetic field electromagnetic planetary gear power divider and aims to solve the problems of large size, complex structure, high cost, performance limitation and failure in effective power output of a system due to the fact that engines in existing series, parallel and series-parallel driving devices cannot simply and efficiently match with other parts of the system. A radial birotor motor and an axial torque adjustment motor are parallelly arranged in a shell of a motor. A flux adjustment rotor with q projection units in the radial birotor motor is driven by a prime motor, stators form a field with the pole number of 2p, and the required rotation speed is outputted by an output shaft of a permanent magnetic rotor with the pole number of 2n, wherein p is equal to |hn+kq|. The output rotation speed is independent from the input rotation speed to realize stepless speed change. The axial torque adjustment motor inputs driving torques or braking torques according to actual load demands to meet actual torque requirements of loads so as to balance input energy and output energy of output shafts of permanent magnetic rotors.

Description

Radial-axial magnetic field electromagnetic planetary gear power divider

Technical field

The present invention relates to the power divider that a kind of composite structure motor is formed, belong to electric motor of automobile field.

Background technology

The fuel consume of traditional combustion engine automobile and pollution emission are the hot issues of worldwide attention.Use electric automobile can realize low energy consumption, low emission, but the problem of the aspect such as its energy density of battery, life-span, price due to one of the critical component as electric automobile, the cost performance of electric automobile cannot be contended with traditional internal-combustion engines vehicle, in this case, the mixed power electric car development of merging internal-combustion engines vehicle and electric automobile advantage rapidly, becomes the focus of new automobile exploitation.

The feature of existing tandem drive unit is: can make engine not by the impact of automobile running working condition, all the time in the service area stable operation of its best, and optionally use lower-powered engine, but the generator that required power is enough large and motor, the output of engine all need be converted into electric energy and become the mechanical energy driving automobile again, because the efficiency of energy converting between mechanical and battery charging and discharging is lower, make the utilance of fuel oil energy lower; Parallel drive unit capacity usage ratio is relatively high, but engine operating condition will by the impact of automobile running working condition, therefore be unsuitable for changing driving cycle frequently, compared to series-mode frame, need comparatively complicated speed change gear and Power compound device and transmission mechanism; Series parallel type drive unit has merged tandem and parallel advantage, and because the energy flow of whole drive system is more flexible, therefore the parts such as engine, generator, motor can be optimized further, thus make whole system efficiency higher.But still need comparatively complicated speed change gear and Power compound device and transmission mechanism.

In above-mentioned drive unit, there is engine and system miscellaneous part can not the problem of cooperation, makes whole system there is volume heaviness, complex structure, power consumption is large, exhaust emissions amount is large problem, and can not effectively output power.

Summary of the invention

The present invention seeks to can not simply efficiently coordinate to solve engine and system miscellaneous part in existing tandem, parallel and series parallel type drive unit, thus make whole system there is volume heaviness, complex structure, high expensive, limited performance, and the problem that can not effectively output power, provide a kind of radial-axial magnetic field electromagnetic planetary gear power divider.

Radial-axial magnetic field electromagnetic planetary gear power divider of the present invention, radial double-rotor machine and axial torque adjustment motor is set side by side with in housing, described radial double-rotor machine comprises the first stator, the first p-m rotor, adjustable magnetic rotor, adjustable magnetic rotor of output shaft axle and p-m rotor output shaft, described axial torque regulates motor to comprise the second stator and the second p-m rotor, p-m rotor output shaft regulates the armature spindle of motor simultaneously as axial torque

Axial torque regulates the second stator of motor to be fixed on the end cap inwall of housing, and the second p-m rotor is fixed on p-m rotor output shaft, there is axial air-gap L3 between the second stator and the second p-m rotor;

First stator of radial double-rotor machine is fixed on the internal circular surfaces of housing, and the first stator interior ecto-entad is disposed with the first p-m rotor and adjustable magnetic rotor; Adjustable magnetic rotor is fixed in adjustable magnetic rotor of output shaft axle, one end of adjustable magnetic rotor of output shaft axle is rotationally connected by the second bearing and the 4th bearing and the first p-m rotor, the other end of adjustable magnetic rotor of output shaft axle stretches out from an end cap of housing, and is connected with housing into rotation by clutch shaft bearing; First p-m rotor is between the first stator and adjustable magnetic rotor, and one end of p-m rotor output shaft is fixed on the first p-m rotor, and the other end of p-m rotor output shaft stretches out from another end cap of housing, and is connected with housing into rotation by the 3rd bearing;

Radial air gap L1 is there is between first p-m rotor and the first stator; Radial air gap L2 is there is between first p-m rotor and adjustable magnetic rotor; The dead in line of adjustable magnetic rotor of output shaft axle and p-m rotor output shaft;

First stator is made up of the first stator core and m phase first stator winding, and when the first stator winding is connected with m symmetrical alternating current, form the rotating magnetic field of 2p number of poles, m, p are positive integer;

The rotor of the first p-m rotor to be number of pole-pairs be n, n is positive integer;

Adjustable magnetic rotor is made up of adjustable magnetic rotor core and q protrusion unit, and q protrusion unit is along the circumferential direction uniformly distributed arrangement, and q is positive integer;

And meet the establishment of p=|hn+kq| relational expression, wherein, h is positive odd number, and k is integer.

Advantage of the present invention: radial-axial magnetic field electromagnetic planetary gear power divider of the present invention is the motor of composite construction, there are two rotating shafts, the rotating speed of these two rotating shafts is independent of one another and rotating speed is adjustable, the torque of two rotating shaft outputs is independent of one another and torque is adjustable, a rotating shaft can be made like this to realize the little torque of high speed run, another rotating shaft realizes low speed high torque and runs.

The present invention, when being combined with internal combustion engine, can making internal combustion engine not rely on road conditions, operate in peak efficiency district all the time, thus reduce fuel consume and exhaust emissions, realizes energy-saving and cost-reducing; It also can replace gearbox in automobile, the parts such as clutch and flywheel simultaneously, and vehicle structure is simplified, and cost reduces.It realizes speed Driving control, the wide region smoothly adjustable-speed of automobile by electronic device; Also there is the cooling device not needing complexity, the advantage that structure is simple, volume is little, with low cost simultaneously.In the commercial plant that two mechanical rotating shafts that it also can be applicable to different rotating speeds work simultaneously.

The invention belongs to brushless structure, because adopting electric brush slip ring feed structure, the operational efficiency that causes declines, reliability reduces and often need to carry out the problem such as safeguarding to parts such as brushes to overcome brush composite structure motor.

Accompanying drawing explanation

Fig. 1 is the structural representation of radial-axial magnetic field electromagnetic planetary gear power divider described in execution mode two;

Fig. 2 is the A-A cutaway view of Fig. 1;

Fig. 3 is the structural representation of radial-axial magnetic field electromagnetic planetary gear power divider described in execution mode three;

Fig. 4 is the D-D cutaway view of Fig. 3;

Fig. 5 is the structural representation of radial-axial magnetic field electromagnetic planetary gear power divider described in execution mode four;

Fig. 6 is the E-E cutaway view of Fig. 5;

Fig. 7 is the B-B cutaway view of Fig. 1, Fig. 3 or Fig. 5;

Fig. 8 is the C-C cutaway view of Fig. 1, Fig. 3 or Fig. 5;

Fig. 9 is the principle key diagram of execution mode two;

Figure 10 is the magnetic circuit schematic diagram of radial magnetic field modulating described in Chinese patent CN101951090A;

Figure 11 is the magnetic circuit schematic diagram of radial double-rotor machine described in execution mode two;

Figure 12 is the outer air-gap field waveform schematic diagram of radial magnetic field modulating described in Chinese patent CN101951090A;

Figure 13 is the interior air-gap field waveform schematic diagram of radial magnetic field modulating described in Chinese patent CN101951090A;

Figure 14 is the outer air-gap field waveform schematic diagram of radial double-rotor machine described in execution mode two;

Figure 15 is the interior air-gap field waveform schematic diagram of radial double-rotor machine described in execution mode two;

Figure 16 is the counter potential waveform contrast schematic diagram of the radial double-rotor machine of Chinese patent CN101951090A and execution mode two; In figure, solid line waveform is the counter potential waveform of the radial double-rotor machine of execution mode two, and dotted line waveform is the counter potential waveform of Chinese patent CN101951090A.

Figure 17 is the electromagnetic torque comparison of wave shape schematic diagram of the adjustable magnetic rotor of the radial double-rotor machine of Chinese patent CN101951090A and execution mode two; In figure, solid line waveform is the electromagnetic torque waveform of the adjustable magnetic rotor of the radial double-rotor machine of execution mode two, and dotted line waveform is the electromagnetic torque waveform of the adjustable magnetic rotor of Chinese patent CN101951090A.

Figure 18 is the electromagnetic torque comparison of wave shape schematic diagram of the p-m rotor of the radial double-rotor machine of Chinese patent CN101951090A and execution mode two, in figure, solid line waveform is the electromagnetic torque waveform of the p-m rotor of the radial double-rotor machine of execution mode two, and dotted line waveform is the electromagnetic torque waveform of the p-m rotor of Chinese patent CN101951090A.

Embodiment

Embodiment one: present embodiment is described below in conjunction with Fig. 1 ~ Figure 18, radial-axial magnetic field electromagnetic planetary gear power divider described in present embodiment, radial double-rotor machine and axial torque adjustment motor is set side by side with in housing 4, described radial double-rotor machine comprises the first stator 5, first p-m rotor 6, adjustable magnetic rotor 7, adjustable magnetic rotor of output shaft axle 1 and p-m rotor output shaft 9, described axial torque regulates motor to comprise the second stator 11 and the second p-m rotor 12, p-m rotor output shaft 9 regulates the armature spindle of motor simultaneously as axial torque

Axial torque regulates the second stator 11 of motor to be fixed on the end cap inwall of housing 4, and the second p-m rotor 12 is fixed on p-m rotor output shaft 9, there is axial air-gap L3 between the second stator 11 and the second p-m rotor 12;

First stator 5 of radial double-rotor machine is fixed on the internal circular surfaces of housing 4, and the inner ecto-entad of the first stator 5 is disposed with the first p-m rotor 6 and adjustable magnetic rotor 7; Adjustable magnetic rotor 7 is fixed in adjustable magnetic rotor of output shaft axle 1, one end of adjustable magnetic rotor of output shaft axle 1 is rotationally connected by the second bearing 3 and the 4th bearing 10 and the first p-m rotor 6, the other end of adjustable magnetic rotor of output shaft axle 1 stretches out from an end cap of housing 4, and is rotationally connected by clutch shaft bearing 2 and housing 4; First p-m rotor 6 is between the first stator 5 and adjustable magnetic rotor 7, one end of p-m rotor output shaft 9 is fixed on the first p-m rotor 6, the other end of p-m rotor output shaft 9 stretches out from another end cap of housing 4, and is rotationally connected with housing 4 by the 3rd bearing 8;

Radial air gap L1 is there is between first p-m rotor 6 and the first stator 5; Radial air gap L2 is there is between first p-m rotor 6 and adjustable magnetic rotor 7; The dead in line of adjustable magnetic rotor of output shaft axle 1 and p-m rotor output shaft 9;

First stator 5 is made up of the first stator core 5-2 and m phase first stator winding 5-1, and when the first stator winding 5-1 is connected with m symmetrical alternating current, form the rotating magnetic field of 2p number of poles, m, p are positive integer;

First p-m rotor 6 for number of pole-pairs be the rotor of n, n is positive integer;

Adjustable magnetic rotor 7 is made up of adjustable magnetic rotor core 7-1 and q protrusion unit 7-2, and q protrusion unit 7-2 is along the circumferential direction uniformly distributed arrangement, and q is positive integer;

And meet the establishment of p=|hn+kq| relational expression, wherein, h is positive odd number, and k is integer.

First stator core 5-2 is annular, and its internal circular surfaces has multiple groove vertically, and the open centre line of described multiple groove is uniformly distributed around adjustable magnetic rotor of output shaft axle 1, and the first stator winding 5-1 embeds respectively in described groove and forms m phase winding.

Adjustable magnetic rotor core 7-1 and protrusion unit 7-2 selects soft-magnetic composite material, silicon steel sheet, solid-iron or soft magnetic ferrite.

Adjustable magnetic rotor core 7-1 and q protrusion unit 7-2 is integrated part or separate piece, and the shape of protrusion unit 7-2 is random.

Embodiment two: below in conjunction with Fig. 1, Fig. 2, Fig. 7 ~ Figure 18 illustrates present embodiment, present embodiment is described further execution mode one, first p-m rotor 6 comprises rotor field spider 6-1, n the first permanent magnet unit 6-2 and n the second permanent magnet unit 6-3, rotor field spider 6-1 is along the circumferential direction evenly interspersed the first permanent magnet unit 6-2 and the second permanent magnet unit 6-3, the magnetizing direction of n the first permanent magnet unit 6-2 is identical, the magnetizing direction of n the second permanent magnet unit 6-3 is identical, first permanent magnet unit 6-2 is contrary with the second permanent magnet unit 6-3 magnetizing direction.

The magnetizing direction of the first permanent magnet unit 6-2 is radial magnetizing or radially parallel magnetization.

The magnetizing direction of the second permanent magnet unit 6-3 is radial magnetizing or radially parallel magnetization.

In order to operation principle of the present invention is described, present embodiment is described for structure shown in Fig. 1, concrete schematic diagram, see Fig. 9, in adjustable magnetic rotor of output shaft axle 1 and p-m rotor output shaft 9, is power shaft by the axle that prime mover drags, another is then output shaft, whom is power shaft as, and who is output shaft, determines according to the specific requirement in work, the present embodiment is with adjustable magnetic rotor of output shaft axle 1 for power shaft, and p-m rotor output shaft 9 is output shaft.

Radial-axial magnetic field electromagnetic planetary gear power divider is functionally divided into two parts from attainable: a part is radial double-rotor machine; Another part is that axial torque regulates motor.The function that radial double-rotor machine mainly realizes is the rotating speed making the rotating speed of p-m rotor output shaft 9 not rely on adjustable magnetic rotor of output shaft axle 1, and make p-m rotor output shaft 9 realize infinitely variable speeds, p-m rotor output shaft 9 exports corresponding torque according to the torque of the input of adjustable magnetic rotor of output shaft axle 1 according to certain ratio simultaneously.The effect of axial torque adjustment motor is the needs according to actual loading, input queued switches torque or brake torque, the torque making p-m rotor output shaft 9 finally output to load does not rely on the torque that adjustable magnetic rotor of output shaft axle 1 inputs, and achieves the flexible of torque.

The operation principle of labor once radial double-rotor machine below:

First prime mover drives adjustable magnetic rotor 7 to be rotated counterclockwise by adjustable magnetic rotor of output shaft axle 1 with driving torque T, and its rotary speed is Ω ₁;

Balance to make adjustable magnetic rotor 7 Moment, now pass into the symmetrical alternating current of m by the first stator winding 5-1 of the first stator 5, in outer air gap L1 and internal layer air gap L2, produce the stator rotating magnetic field of 2p number of poles, the rotary speed of described stator rotating magnetic field is Ω _s;

Described stator rotating magnetic field, by the magnetic field modulation effect of adjustable magnetic rotor 7, produces the rotating magnetic field with the identical number of poles of the first p-m rotor 6 in outer air gap L1 with internal layer air gap L2, by the interaction in magnetic field, and the permanent-magnet torque T of generation _pMact on p-m rotor 6, and permanent-magnet torque T _pMdirection be counterclockwise; P-m rotor output shaft 9 is with permanent-magnet torque T simultaneously _pMdrive load;

Again according to the principle of active force and reaction force, exist and permanent-magnet torque T _pMequal and opposite in direction and the contrary moment T' in direction _pMact on adjustable magnetic rotor 7, T' simultaneously _pMdirection be clockwise direction;

Meanwhile, with speed Ω _pMthe p-m rotor rotating magnetic field that the first p-m rotor 6 rotated produces, by the magnetic field modulation effect of adjustable magnetic rotor 7, produces the rotating magnetic field of 2p number of poles, interacts with stator rotating magnetic field, can produce stator torque T in outer air gap L1 and internal layer air gap L2 _s, and act on the first stator 5, and stator torque T _sdirection is counterclockwise;

According to the principle of active force and reaction force, exist and stator torque T _sequal and opposite in direction and the contrary moment T ' in direction _sact on adjustable magnetic rotor 7, and direction is clockwise direction simultaneously;

Therefore, the torque T of adjustable magnetic rotor 7 _msatisfy condition: T _m=T ' _s+ T' _pM=-(T _s+ T _pM), and direction is clockwise direction; As the above analysis, the torque T on adjustable magnetic rotor 7 is acted on _mcontrary with the direction of driving torque T; When the two equal and opposite in direction, adjustable magnetic rotor 7 is in stable state.

This shows, the torque T of adjustable magnetic rotor 7 _mpermanent-magnet torque T _pMwith stator torque T _ssynthesis torque.Therefore, the torque T of adjustable magnetic rotor 7 _mthe Driving Torque T of the first p-m rotor 6 will be greater than _pM, and the two has certain no-load voltage ratio.

Dual-rotor structure motor of the present invention, according to the work of magnetic field modulation principle, can be derived by magnetic field modulation principle, the rotary speed Ω of the first stator 5 rotating magnetic field _s, adjustable magnetic rotor 7 rotary speed Ω _mwith the rotary speed Ω of the first p-m rotor 6 _pMmeet relational expression (1):

${\mathrm{\Ω}}_s=\frac{\mathrm{hn}}{\mathrm{hn}+\mathrm{kq}}{\mathrm{\Ω}}_{\mathrm{PM}}+\frac{\mathrm{kq}}{\mathrm{hn}+\mathrm{kq}}{\mathrm{\Ω}}_m---\left(1\right)$

The rotary speed Ω of the first stator 5 rotating magnetic field _sbe determined by the power frequency f passing into the first stator winding 5-1, therefore, double-rotor machine rotating speed can be regulated by regulating the power frequency f passing into the first stator winding 5-1, making a concrete analysis of the principle of several special circumstances and generation thereof below:

1, in the actionless situation of the first p-m rotor 6, i.e. Ω _pM=0, substitute into formula (1), then there is following relational expression and set up:

${\mathrm{\Ω}}_s=\frac{\mathrm{kq}}{\mathrm{hn}+\mathrm{kq}}{\mathrm{\Ω}}_m---\left(2\right)$

Its principle produced is:

In the actionless situation of the first p-m rotor 6, now the first stator winding 5-1 leads to m symmetrical alternating current generation stator rotating magnetic field with rotary speed Ω _srotate, and adjustable magnetic rotor 7 under the driving of prime mover with rotary speed Ω _mrotate, this mode of operation equivalent can regard the mode of operation of magnetic gear as.According to the operation principle of magnetic gear, and the relational expression that in the first number of pole-pairs p of stator rotating magnetic field, the rotating magnetic field number of pole-pairs n of the first p-m rotor 6 and adjustable magnetic rotor 7, protrusion unit number q unshakable in one's determination meets: p=|hn+kq|, known: when the first p-m rotor 6 transfixion, then the rotary speed Ω of the first stator rotating magnetic field _swith the rotary speed Ω of adjustable magnetic rotor 7 _mmeet relational expression (2), it can thus be appreciated that the rotary speed Ω of the first stator rotating magnetic field _swith the rotary speed Ω of adjustable magnetic rotor 7 _mhave certain no-load voltage ratio relation, in both adjustments, either party rotating speed all can make the rotating speed of the opposing party change.

2, pass into frequency f=0 of the electric current of the first stator winding 5-1, when namely the first stator winding 5-1 passes into direct current, the stator field of generation is stationary magnetic field, non rotating, Ω _s=0, substitute into formula (1), then there is following relational expression and set up:

${\mathrm{\Ω}}_m=\frac{-\mathrm{hn}}{\mathrm{kq}}{\mathrm{\Ω}}_{\mathrm{PM}}---\left(3\right)$

Its principle produced is:

When the first stator winding 5-1 passes into direct current, produce stationary magnetic field, adjustable magnetic rotor 7 is Ω with rotary speed under the driving of prime mover simultaneously _mrotor rotating magnetic field, and be not now fixed the first p-m rotor 6, this mode of operation equivalence can regard the another kind of mode of operation of magnetic gear as.According to the operation principle of magnetic gear, and the relational expression that in the first number of pole-pairs p of stator rotating magnetic field, the rotating magnetic field number of pole-pairs n of the first p-m rotor 6 and adjustable magnetic rotor 7, protrusion unit number q unshakable in one's determination meets: p=|hn+kq|, known: the first p-m rotor 6 will rotate with certain speed, the first p-m rotor 6 rotary speed Ω _pMwith the rotary speed Ω of adjustable magnetic rotor 7 _mrelational expression (3) will be met, it can thus be appreciated that the rotary speed Ω of the first p-m rotor 6 _pMwith the rotary speed Ω of adjustable magnetic rotor 7 _mhave certain no-load voltage ratio, in both adjustments, either party rotating speed all can make the rotating speed of the opposing party change;

Be described the generation principle of formula (1) below, if the stationary magnetic field now making the first stator 5 produce " rotates ", namely when the first stator winding 5-1 passes into symmetrical alternating current generation stator rotating magnetic field, can derive according to magnetic field modulation principle, the rotary speed Ω of the first stator rotating magnetic field _swith the rotary speed Ω of the first p-m rotor 6 _pMwith the rotary speed Ω of adjustable magnetic rotor 7 _mmeet relational expression (1).Therefore, as the speed Ω of internal layer adjustable magnetic rotor 7 _mwhen constant, regulate the rotary speed Ω of the first stator rotating magnetic field _s, the rotary rpm Ω of the first p-m rotor 6 can be realized _pMadjustment.This shows, the rotary speed Ω of the first p-m rotor 6 _pMby the rotary speed Ω of adjustable magnetic rotor 7 _mwith the rotary speed Ω of the first stator rotating magnetic field _scommon decision.

To sum up, radial double-rotor machine of the present invention regulates the frequency f passing into the electric current of the first stator winding 5-1 to carry out adjusting rotary speed according to formula (1).

Known by above-mentioned analysis, two rotors of radial double-rotor machine can realize speed changing function, as radial magnetic field electromagnetic planetary gear speed changer.In addition, formula (1) can be expressed as

$\frac{{\mathrm{\Ω}}_s-{\mathrm{\Ω}}_{\mathrm{PM}}}{{\mathrm{\Ω}}_s-{\mathrm{\Ω}}_m}=-\frac{\mathrm{hn}}{\mathrm{kq}}---\left(4\right)$

And in traditional mechanical planetary gear, have following relation,

$\frac{{\mathrm{\Ω}}_c-{\mathrm{\Ω}}_{\mathrm{SG}}}{{\mathrm{\Ω}}_c-{\mathrm{\Ω}}_r}=-\frac{R}{S}---\left(5\right)$

In formula (5), Ω _sG, Ω _cand Ω _rsun gear rotating speed in mechanical planetary gear, planet carrier rotating speed and gear ring rotating speed respectively; R and S is the gear ring number of teeth and the sun gear number of teeth respectively.Through type (4) and formula (5) contrast known, radial double-rotor machine can realize mechanical planetary speed-regulating function (only can need be realized by setting h, k, n, q parameter), and radial double-rotor machine is the planetary gear speed-regulating function realized by electromagnetic energy conversion regime, it does not exist in mechanical planetary gear because of the problem such as wearing and tearing, periodic maintenance, mechanical breakdown that Gear Contact causes.

The operation principle that described in Chinese patent CN101951090A, the motor of radial magnetic field modulating and present embodiment adopts has certain similitude, but two schemes are different in mechanical structure, magnetic structure, motor performance, show as follows:

1. in mechanical structure, the modulation rotor of CN101951090A scheme is between stator and p-m rotor, and modulation rotor is made up of magnetic inductive block and non-magnetic block gap, do not allow to be made of one by permeability magnetic material to make it be communicated with between adjacent two magnetic inductive blocks, could realize magnetic field modulation function like this, and then ensure the electromagnetic performance of motor.Therefore, simultaneously the major issue that existing scheme faces how to take into account motor electromagnetic performance to ensure again that modulation rotor arranges magnetic inductive block and the non-magnetic piece of problems of mechanical strength brought because of interval.

The application's scheme, adjustable magnetic rotor is positioned at innermost layer, the protrusion unit 7-2 of multiple magnetic conduction function achieves magnetic field modulation function equally, and these protrusion unit 7-2 need to make it connect with permeability magnetic material and more could be conducive to motor main magnetic circuit flux closure (see main magnetic circuit path in Figure 11) on magnetic circuit, thus ensure motor electromagnetic performance.Therefore, from structure, only need to adopt same permeability magnetic material to make the integrated adjustable magnetic rotor with multiple protrusion unit 7-2, the adjustable magnetic function of adjustable magnetic rotor 7 can be realized.And the more important thing is, such structure makes the mechanical strength of adjustable magnetic rotor 7 significantly strengthen, thus the problem that the motor performance solved in existing scheme and mechanical strength can not be taken into account.

Principles illustrated is according to the present embodiment known, the torque T of adjustable magnetic rotor 7 _mthe Driving Torque T of p-m rotor 6 will be greater than _pM; Also " the Driving Torque T of modulation rotor 6 is described in CN101951090A ₃the Driving Torque T of p-m rotor 7 will be greater than ₁" this technical characteristic; namely the two all requires that the torque of adjustable magnetic is greater than the torque of permanent magnetism; this just requires that the intensity of adjustable magnetic rotor is greater than the intensity of p-m rotor; the structure of motor is just reasonable; efficiency just can be higher; the electric machine structure of present embodiment exactly meets this feature, and therefore the electric machine structure of present embodiment is more reasonable, and efficiency is higher.

2. on magnetic structure, the permanent magnet leakage magnetic circuit of CN101951090A only have passed through one deck air gap (internal layer air gap L2) and can close (see Figure 10), by contrast, the permanent magnet leakage magnetic circuit of present embodiment needs could close (see Figure 11) through two-layer air gap (internal layer air gap L2 and outer air gap L1), therefore, the motor of present embodiment is fewer than CN101951090A leakage field.For the CN101951090A of same number of pole-pairs relation and present embodiment (CN101951090A: stator poles logarithm is for 4, and permanent magnet pole logarithm is 17, and magnetic inductive block number is 21; Present embodiment: stator poles logarithm is 4, permanent magnet pole logarithm is 17, magnetic conduction protrusion unit 7-2 number is 21), field waveform in ectonexine air gap L2 in two schemes is respectively as Figure 12-Figure 15. contrast these 4 figure, can find out because the leakage path in two schemes is different, make the field waveform of present embodiment ectomesoderm air gap obviously be different from the field waveform of CN101951090A ectomesoderm air gap, and the magnetic field amplitude of present embodiment ectomesoderm air gap is also obviously greater than the magnetic field amplitude of CN101951090A ectomesoderm air gap.Therefore, based on the advantage of present embodiment at magnetic path connection, present embodiment has more superior electromagnetic performance than CN101951090A.Still for above-mentioned two concrete models, carried out simulation analysis to the key technical index (back-emf, electromagnetic torque) of CN101951090A and present embodiment, simulation result is as Figure 16-Figure 18.As can be seen from simulation result, the back-emf amplitude of present embodiment is obviously greater than the back-emf amplitude of CN101951090A; In present embodiment, the average electromagnetic torque of adjustable magnetic rotor is obviously greater than in CN101951090A the average electromagnetic torque modulating rotor; In present embodiment, the average electromagnetic torque of p-m rotor is obviously greater than in CN101951090A the average electromagnetic torque modulating rotor.Therefore, compare CN101951090A, present embodiment can obtain higher torque density and power density.

The operation principle of the motor of labor axial torque adjustment once below:

Because the second p-m rotor 12 is fixed on p-m rotor output shaft 9, so the second p-m rotor 12 rotates with the rotating speed of p-m rotor output shaft 9.When second stator winding 11-2 passes into polyphase alternating current, the rotating magnetic field identical with the second p-m rotor 12 magnetic field number of poles is produced in space, produce torque by the interaction in magnetic field and be applied on the second p-m rotor 12, being delivered on p-m rotor output shaft 9 simultaneously.

When the torque be input on p-m rotor output shaft 9 of radial double-rotor machine is greater than the torque of load needs, by the electric current of control inputs second stator winding 11-2, axial torque is made to regulate machine operation in dynamic brake state, now axial torque regulates motor generation brake torque to act on p-m rotor output shaft 9, therefore, ensure that the torque phase balance of p-m rotor output shaft 9 input and output.At this moment, the radial double-rotor machine energy part be input on p-m rotor output shaft 9 is used for driving load, and another part is used for driving axial torque adjustment motor makes it generate electricity, thus make p-m rotor output shaft 9 input and output can amount phase equilibrium.

When the torque be input on p-m rotor output shaft 9 of radial double-rotor machine is less than the torque of load needs, by the electric current of control inputs second stator winding 11-2, axial torque is made to regulate machine operation in motorized motions state, now axial torque regulates motor generation driving torque to act on p-m rotor output shaft 9, therefore, ensure that the torque phase balance of p-m rotor output shaft 9 input and output.At this moment, drive the energy of a load part to derive from radial double-rotor machine and be input to energy on p-m rotor output shaft 9, another part derives from the energy that axial torque regulates motor input, thus makes the energy amount phase equilibrium of p-m rotor output shaft 9 input and output.

When the torque that radial double-rotor machine is input on p-m rotor output shaft 9 is equal with the torque that load needs, now axial torque regulates motor not work.At this moment, drive the energy of load all to derive from radial double-rotor machine and be input to energy on p-m rotor output shaft 9, thus make p-m rotor output shaft 9 input and output can amount phase equilibrium.

Known by above-mentioned analysis, under engine and wheel-borne load are operated in different rotational speed and torque states respectively, the speed-regulating function that what radial double-rotor machine realized is between engine and wheel-borne load; What axial torque regulated motor to realize is tune square function between engine and wheel-borne load.From energy distribution angle, engine is delivered to the mechanical energy of a radial double-rotor machine rotor, part mechanical energy passes to wheel-borne load by another rotor, another part mechanical energy converts electrical energy transfer to by stator and goes out, and this part electric energy regulates motor to convert mechanical energy to through axial torque again and passes to wheel-borne load simultaneously.This electric machine structure of present embodiment can as electromagnetic planetary gear power divider.

Embodiment three: present embodiment is described below in conjunction with Fig. 3 and Fig. 4, present embodiment is described further execution mode one, first p-m rotor 6 comprises rotor field spider 6-1, n the first permanent magnet unit 6-2 and n p-m rotor 6-4 unshakable in one's determination, along the circumferential direction evenly the be interspersed magnetizing direction of the first permanent magnet unit 6-2 and p-m rotor 6-4, n the first permanent magnet unit 6-2 unshakable in one's determination of rotor field spider 6-1 is identical.

The magnetizing direction of the first permanent magnet unit 6-2 is radial magnetizing or radially parallel magnetization.

P-m rotor 6-4 unshakable in one's determination is silicon steel sheet or solid-iron.

The advantage of present embodiment is under the permanent magnetic field of same number of pole-pairs, saves the permanent magnet consumption of half.

Embodiment four: present embodiment is described below in conjunction with Fig. 5 and Fig. 6, present embodiment is described further execution mode one, first p-m rotor 6 comprises rotor field spider 6-1, n first permanent magnet unit 6-2, n the second permanent magnet unit 6-3 and n p-m rotor 6-4 unshakable in one's determination, rotor field spider 6-1 is along the circumferential direction evenly interspersed the first permanent magnet unit 6-2 and the second permanent magnet unit 6-3, arranges p-m rotor 6-4 unshakable in one's determination between arbitrary neighborhood two the first permanent magnet unit 6-2 and the second permanent magnet unit 6-3; The magnetizing direction of n the first permanent magnet unit 6-2 is identical, and the magnetizing direction of n the second permanent magnet unit 6-3 is identical, and the first permanent magnet unit 6-2 is contrary with the second permanent magnet unit 6-3 magnetizing direction.

The magnetizing direction of the first permanent magnet unit 6-2 is cutting orientation magnetizing or cuts radial parallel magnetizing.

The magnetizing direction of the second permanent magnet unit 6-3 is cutting orientation magnetizing or tangentially parallel magnetization.

In present embodiment, the first p-m rotor 6 belongs to magnetism-collected structure, under the parallel connection effect of the first p-m rotor 6 adjacent permanent magnet, make under every pole field, have two pieces of permanent magnets to provide magnetic flux to air gap, can air gap flux density be improved, especially more outstanding when number of poles is more.

Embodiment five: present embodiment is described further the arbitrary execution mode of execution mode one to four, second stator 11 is made up of second stator core 11-1 and m ' phase the second stator winding 11-2, second stator core 11-1 is annular, the outer toroid end cap of the second stator core 11-1 is fixed on the end cap inwall of housing 4, the interior annulus end cap of the second stator core 11-1 radially has multiple groove, the open centre line of described multiple groove is uniformly distributed in radial line centered by p-m rotor output shaft 9, second stator winding 11-2 embeds respectively in described groove and forms m ' phase winding, m ' is positive integer.

Embodiment six: present embodiment is described further the arbitrary execution mode of execution mode one to four, second p-m rotor 12 is made up of the second p-m rotor 12-2 and 2r the second permanent magnet unit 12-1 unshakable in one's determination, second p-m rotor 12-2 unshakable in one's determination is disc, and be fixed on p-m rotor output shaft 9, 2r the second permanent magnet unit 12-1 is arranged in the second p-m rotor 12-2 unshakable in one's determination card relative with the second stator 11, and evenly arrange in radial line centered by p-m rotor output shaft 9, 2r the second permanent magnet unit 12-1 is arranged on the second p-m rotor 12-2 unshakable in one's determination on the surface or embed in the second p-m rotor 12-2 surface unshakable in one's determination, second permanent magnet unit 12-1 parallel magnetization vertically, and the magnetizing direction of adjacent two piece of second permanent magnet unit 12-1 is contrary, r is positive integer.

Claims (9)

1. radial-axial magnetic field electromagnetic planetary gear power divider, it is characterized in that, radial double-rotor machine and axial torque adjustment motor is set side by side with in housing (4), described radial double-rotor machine comprises the first stator (5), first p-m rotor (6), adjustable magnetic rotor (7), adjustable magnetic rotor of output shaft axle (1) and p-m rotor output shaft (9), described axial torque regulates motor to comprise the second stator (11) and the second p-m rotor (12), p-m rotor output shaft (9) regulates the armature spindle of motor simultaneously as axial torque,

Axial torque regulates second stator (11) of motor to be fixed on the end cap inwall of housing (4), second p-m rotor (12) is fixed on p-m rotor output shaft (9), there is axial air-gap L3 between the second stator (11) and the second p-m rotor (12);

First stator (5) of radial double-rotor machine is fixed on the internal circular surfaces of housing (4), and the first stator (5) inner ecto-entad is disposed with the first p-m rotor (6) and adjustable magnetic rotor (7); Adjustable magnetic rotor (7) is fixed in adjustable magnetic rotor of output shaft axle (1), one end of adjustable magnetic rotor of output shaft axle (1) is rotationally connected with the first p-m rotor (6) by the second bearing (3) and the 4th bearing (10), the other end of adjustable magnetic rotor of output shaft axle (1) stretches out from an end cap of housing (4), and is rotationally connected by clutch shaft bearing (2) and housing (4); First p-m rotor (6) is positioned between the first stator (5) and adjustable magnetic rotor (7), one end of p-m rotor output shaft (9) is fixed on the first p-m rotor (6), the other end of p-m rotor output shaft (9) stretches out from another end cap of housing (4), and is rotationally connected by the 3rd bearing (8) and housing (4);

Radial air gap L1 is there is between first p-m rotor (6) and the first stator (5); Radial air gap L2 is there is between first p-m rotor (6) and adjustable magnetic rotor (7); The dead in line of adjustable magnetic rotor of output shaft axle (1) and p-m rotor output shaft (9);

First stator (5) is made up of the first stator core (5-2) and m phase first stator winding (5-1), when first stator winding (5-1) is connected with m symmetrical alternating current, form the rotating magnetic field of 2p number of poles, m, p are positive integer;

First p-m rotor (6) for number of pole-pairs be the rotor of n, n is positive integer;

Adjustable magnetic rotor (7) is made up of adjustable magnetic rotor core (7-1) and q protrusion unit (7-2), and q protrusion unit (7-2) is along the circumferential direction uniformly distributed arrangement, and q is positive integer;

And meet the establishment of p=|hn+kq| relational expression, wherein, h is positive odd number, and k is integer.

2. radial-axial magnetic field electromagnetic planetary gear power divider according to claim 1, it is characterized in that, first stator core (5-2) is annular, its internal circular surfaces has multiple groove vertically, the open centre line of described multiple groove is uniformly distributed around adjustable magnetic rotor of output shaft axle (1), and the first stator winding (5-1) embeds respectively in described groove and forms m phase winding.

3. radial-axial magnetic field electromagnetic planetary gear power divider according to claim 1, it is characterized in that, adjustable magnetic rotor core (7-1) and protrusion unit (7-2) all select soft-magnetic composite material, silicon steel sheet, solid-iron or soft magnetic ferrite.

4. radial-axial magnetic field electromagnetic planetary gear power divider according to claim 3, it is characterized in that, adjustable magnetic rotor core (7-1) and q protrusion unit (7-2) are integrated part.

5. radial-axial magnetic field electromagnetic planetary gear power divider according to claim 1, it is characterized in that, first p-m rotor (6) comprises rotor field spider (6-1), n the first permanent magnet unit (6-2) and n the second permanent magnet unit (6-3), rotor field spider (6-1) is along the circumferential direction evenly interspersed the first permanent magnet unit (6-2) and the second permanent magnet unit (6-3), the magnetizing direction of n the first permanent magnet unit (6-2) is identical, the magnetizing direction of n the second permanent magnet unit (6-3) is identical, first permanent magnet unit (6-2) is contrary with the second permanent magnet unit (6-3) magnetizing direction.

6. radial-axial magnetic field electromagnetic planetary gear power divider according to claim 1, it is characterized in that, first p-m rotor (6) comprises rotor field spider (6-1), n the first permanent magnet unit (6-2) and n p-m rotor iron core (6-4), rotor field spider (6-1) is along the circumferential direction evenly interspersed the first permanent magnet unit (6-2) and p-m rotor iron core (6-4), and the magnetizing direction of n the first permanent magnet unit (6-2) is identical.

7. radial-axial magnetic field electromagnetic planetary gear power divider according to claim 1, it is characterized in that, first p-m rotor (6) comprises rotor field spider (6-1), n the first permanent magnet unit (6-2), n the second permanent magnet unit (6-3) and n p-m rotor iron core (6-4), rotor field spider (6-1) is along the circumferential direction evenly interspersed the first permanent magnet unit (6-2) and the second permanent magnet unit (6-3), between arbitrary neighborhood two the first permanent magnet units (6-2) and the second permanent magnet unit (6-3), a p-m rotor iron core (6-4) is set, the magnetizing direction of n the first permanent magnet unit (6-2) is identical, the magnetizing direction of n the second permanent magnet unit (6-3) is identical, and the first permanent magnet unit (6-2) is contrary with the second permanent magnet unit (6-3) magnetizing direction.

8. radial-axial magnetic field electromagnetic planetary gear power divider according to claim 1, it is characterized in that, second stator (11) is made up of the second stator core (11-1) and m ' phase second stator winding (11-2), second stator core (11-1) is annular, the outer toroid end cap of the second stator core (11-1) is fixed on the end cap inwall of housing (4), the interior annulus end cap of the second stator core (11-1) radially has multiple groove, the open centre line of described multiple groove is uniformly distributed in radial line centered by p-m rotor output shaft (9), second stator winding (11-2) embeds respectively in described groove and forms m ' phase winding, m ' is positive integer.

9. radial-axial magnetic field electromagnetic planetary gear power divider according to claim 1, it is characterized in that, second p-m rotor (12) is made up of the second p-m rotor iron core (12-2) and 2r the second permanent magnet unit (12-1), second p-m rotor iron core (12-2) is disc, and be fixed on p-m rotor output shaft (9), 2r the second permanent magnet unit (12-1) is arranged in the second p-m rotor iron core (12-2) card relative with the second stator (11), and evenly arrange in radial line centered by p-m rotor output shaft (9), 2r the second permanent magnet unit (12-1) is arranged on the second p-m rotor iron core (12-2) on the surface or embed in the second p-m rotor iron core (12-2) surface, second permanent magnet unit (12-1) parallel magnetization vertically, and the magnetizing direction of adjacent two piece of second permanent magnet unit (12-1) is contrary, r is positive integer.