CN101951090A - Radial magnetic field modulating brushless double-rotor motor - Google Patents
Radial magnetic field modulating brushless double-rotor motor Download PDFInfo
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- CN101951090A CN101951090A CN 201010274167 CN201010274167A CN101951090A CN 101951090 A CN101951090 A CN 101951090A CN 201010274167 CN201010274167 CN 201010274167 CN 201010274167 A CN201010274167 A CN 201010274167A CN 101951090 A CN101951090 A CN 101951090A
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Abstract
The invention provides a radial magnetic field modulating brushless double-rotor motor, belonging to the field of motors. The invention aims to solve the following problem: rotating windings in the existing double-rotor motors need electric brushes and slip rings to introduce current, so that the operation efficiency and the reliability are reduced and the parts such as the electric brushes need to be frequently maintained. The motor is characterized in that stators of the motor are fixed on the inner side walls of a shell; a permanent magnet rotor is fixed on a permanent magnet rotor output shaft; a modulation ring rotor is arranged between the stators and the permanent magnet rotor; the permanent magnet rotor output shaft is connected with the shell and the modulation ring rotor in a rotary manner; one end of the permanent magnet rotor output shaft is fixed on the modulation ring rotor and is connected with the shell in a rotary manner; the stators are electrified to form 2p-numbered pole magnetic fields; 2n-numbered permanent magnet units of the permanent magnet rotor are uniformly distributed and arranged on the excircle surface of a permanent magnet rotor core along the circumferential direction; the permanent magnet rotor rotates to form 2n-numbered pole magnetic fields; q-numbered magnetic blocks and q-numbered insulating blocks interlace on the excircle surface of a support of the modulation ring rotor along the circumference direction; and p is equal to hn plus kq.
Description
Technical field
The present invention relates to the radial magnetic field modulated brushless double rotor motor, belong to machine field.
Background technology
Double-rotor machine has two rotating speed rotors independent of each other and rotating shaft, can realize the twin shaft drive, therefore has broad application prospects in occasions such as electric automobile, wind power generation, torpedo propellings.
Present existing double-rotor machine realize common method that twin shaft drives be rotor with conventional motors still as a rotor, and connect a rotating shaft, the stator of conventional motors rotated be used as another rotor, and connected another rotating shaft.Wherein, a rotating shaft links to each other with prime mover as the input of energy, another rotating shaft links to each other with load as the output of energy, by regulating the frequency of electric current in the rotational stator winding, power shaft and output shaft are operated under the different rotating speeds, thereby realize the energy Flow between prime mover and the load.But the winding that rotates in this motor need be introduced electric current by brush and slip ring, can cause like this that operational efficiency descends, reliability reduces, and often need problem such as safeguard to parts such as brushes.
Summary of the invention
The present invention seeks to introduce electric current by brush and slip ring in order to solve the winding that rotates in the existing double-rotor machine, cause operational efficiency decline, reliability to reduce, and the problem that often need safeguard parts such as brushes, a kind of radial magnetic field modulated brushless double rotor motor is provided.
Radial magnetic field modulated brushless double rotor motor of the present invention comprises housing, stator, p-m rotor, p-m rotor output shaft, modulation rotor and modulation rotor output shaft,
Stator is fixed on the madial wall of housing, p-m rotor is fixed on the p-m rotor output shaft, the modulation rotor is between stator and p-m rotor, the p-m rotor output shaft is rotationally connected by clutch shaft bearing and housing, and the p-m rotor output shaft is rotationally connected with the modulation rotor by second bearing and the 4th bearing, one end of modulation rotor output shaft is fixed on the modulation rotor, and modulation rotor output shaft is rotationally connected by the 3rd bearing and housing; Between modulation rotor and the stator air gap L1 is arranged; Between modulation rotor and the p-m rotor air gap L2 is arranged,
Stator by stator core and m mutually stator winding constitute, when stator winding is connected with the symmetrical alternating current of m, form the rotating magnetic field of 2p number of poles, m, p are positive integer;
P-m rotor is made of p-m rotor iron core and 2n permanent magnet unit, 2n permanent magnet unit is along the circumferential direction evenly arranged evenly, it is unshakable in one's determination inner or be fixed on the outer round surface of p-m rotor iron core that 2n permanent magnet unit embeds p-m rotor, the magnetizing direction of adjacent two permanent magnet units is opposite, during the p-m rotor rotation, form the p-m rotor Surface field of 2n number of poles, n is a positive integer;
The modulation rotor is made of rotor field spider, q piece magnetic inductive block and q piece collets, rotor field spider outer round surface along the circumferential direction be crisscross arranged magnetic inductive block and collets;
And satisfy the p=|hn+kq| relational expression and set up, wherein, h is a positive odd number, and k is an integer.
Advantage of the present invention: motor of the present invention has two rotating shafts, independently of one another and the rotating speed adjustable of the rotating speed of these two rotating shafts, the torque of two rotating shaft outputs has certain torque ratio, can make a rotating shaft realize the little torque operation of high speed like this, and another rotating shaft realizes the low speed high torque operation.Therefore, the present invention is particularly suitable for being applied in occasions such as electric automobile, wind power generation, torpedo propelling, and uses in these occasions, can save gear box, thereby the volume of whole system is reduced, cost reduces, reliability increases.
The invention belongs to brushless structure, the armature winding of stator does not need rotation, has overcome that the operational efficiency that adopts the electric brush slip ring feed structure to be caused descends, reliability reduces and often need problem such as safeguard to parts such as brushes.
Description of drawings
Fig. 1 is the structural representation of execution mode two;
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 is the structural representation of execution mode three;
Fig. 4 is the B-B cutaway view of Fig. 3;
Fig. 5 is the structural representation of execution mode four;
Fig. 6 is the C-C cutaway view of Fig. 5;
Fig. 7 is the structural representation of execution mode five;
Fig. 8 is the D-D cutaway view of Fig. 7;
Fig. 9 is the structural representation of execution mode six;
Figure 10 is the E-E cutaway view of Fig. 9;
Figure 11 is a schematic diagram of the present invention.
Embodiment
Embodiment one: below in conjunction with Fig. 1 to Figure 11 present embodiment is described, present embodiment comprises housing 4, stator 5, p-m rotor 7, p-m rotor output shaft 1, modulation rotor 6 and modulation rotor output shaft,
Stator core 5-2 is an annular, and its internal circular surfaces has a plurality of grooves vertically, and the open centre line of described a plurality of grooves evenly distributes around p-m rotor output shaft 1, and stator winding 5-1 embeds respectively and forms polyphase windings in the described groove.
And satisfy the p=|hn+kq| relational expression and set up, wherein, h is a positive odd number, and k is an integer.
For operation principle of the present invention is described, present embodiment is that example describes with structure shown in Figure 1, for the ease of the details of the each several part that draws, p-m rotor shown in Figure 17 and modulation rotor 6 has all been done the reduce in scale processing, and concrete schematic diagram is referring to Figure 11.
At first prime mover is rotated counterclockwise with driving torque T driving p-m rotor 7 by p-m rotor output shaft 1, and its rotary speed is Ω
1
In order to make p-m rotor 7 suffered equalising torques, will feed the symmetrical alternating current of m this moment among the stator winding 5-1 of stator 5, produce the stator rotating magnetic field of 2p number of poles in outer air gap L1, and the rotary speed of described stator rotating magnetic field is Ω
2
Described stator rotating magnetic field is by the modulating action of modulation rotor 6, produces the rotating magnetic field with p-m rotor 7 identical numbers of poles in internal layer air gap L2, by the interaction in magnetic field, and the internal modulation torque T of generation
1Act on the p-m rotor 7, and torque T
1Direction be clockwise direction;
By principle of moment balance as can be known, T
1=-T, the two equal and opposite in direction, direction is opposite;
According to the principle of active force and reaction force, in internal layer air gap L2, exist and internal modulation torque T as can be known again
1The moment T ' that equal and opposite in direction and direction are opposite
1Act on the modulation rotor 6 T ' simultaneously
1Direction be counterclockwise;
Simultaneously, internal layer is with speed Ω
1The p-m rotor rotating magnetic field that the p-m rotor 7 of rotation produces produces the rotating magnetic field of 2p number of poles by the modulating action of modulation rotor 6 in outer air gap L1, interact with the stator rotating magnetic field, can produce external modulation torque T
2, and act on the stator 5, and external modulation torque T
2Direction is a clockwise direction;
According to the principle of active force and reaction force, in outer air gap L1, exist and external modulation torque T as can be known
2The moment T ' that equal and opposite in direction and direction are opposite
2Act on simultaneously on the modulation rotor 6, and direction is counterclockwise;
Therefore, the output torque T of modulation rotor 6
3Satisfy condition: T
3=T '
1+ T '
2=-(T
1+ T
2), the rotary speed of modulation rotor 6 is Ω
3, and direction is counterclockwise, modulation rotor output shaft is with torque T
3Drive load.
This shows the output torque T of modulation rotor 6
3Be internal modulation torque T
1With external modulation torque T
2Synthetic torque, and the output torque of p-m rotor 7 is internal modulation torque T
1Therefore, the output torque T of modulation rotor 6
3Will be greater than the output torque T of p-m rotor 7
1, and the two has certain no-load voltage ratio.
Dual-rotor structure motor of the present invention can be regulated rotating speed, the rotary speed Ω of stator rotating magnetic field by the frequency f of regulating the electric current that feeds stator winding 5-1
2, the modulation rotor 6 rotary speed Ω
3Rotary speed Ω with p-m rotor 7
1Satisfy relational expression:
Make a concrete analysis of the principle of several special circumstances and generation thereof below:
1, modulating under the rotor 6 actionless situations, i.e. Ω
3=0, substitution formula (1) then exists following relational expression to set up:
The principle of its generation is:
Under modulation rotor 6 actionless situations, the symmetrical alternating current of the logical m of stator winding 5-1 this moment produces the stator rotating magnetic field, and p-m rotor 7 also to have produced rotary speed under the driving of prime mover in the space be Ω
1The rotor rotating magnetic field, this mode of operation can equivalence be regarded the mode of operation of magnetic gear as.Operation principle according to magnetic gear, and magnetic inductive block is counted the relational expression that q satisfies: p=|hn+kq| in the rotating magnetic field number of pole-pairs n of the number of pole-pairs p of stator rotating magnetic field, p-m rotor 7 and the modulation rotor 6, as can be known: when modulation rotor 6 transfixions, the rotary speed Ω of stator rotating magnetic field then
2Rotary speed Ω with the p-m rotor 7 of internal layer
1Satisfy relational expression (2), the rotary speed Ω of stator rotating magnetic field that hence one can see that
2Rotary speed Ω with p-m rotor 7
1Have certain no-load voltage ratio relation, regulate that either party rotating speed all can make the opposing party's rotating speed change in the two.
2, feed frequency f=0 of the electric current of stator winding 5-1, when then stator winding 5-1 feeds direct current, produce the stationary magnetic field, do not rotate Ω
2=0, substitution formula (1) then exists following relational expression to set up:
The principle of its generation is:
When stator winding 5-1 feeds direct current, produce the stationary magnetic field, while p-m rotor 7 has produced rotary speed in the space under the driving of prime mover be Ω
1The rotor rotating magnetic field, and do not fix modulation rotor 6 this moment, this mode of operation can equivalence be regarded the another kind of mode of operation of magnetic gear as.Operation principle according to magnetic gear, and magnetic inductive block is counted the relational expression that q satisfies: p=|hn+kq| in the rotating magnetic field number of pole-pairs n of the number of pole-pairs p of stator rotating magnetic field, p-m rotor 7 and the modulation rotor 6, as can be known: modulation rotor 6 will be rotated with certain speed, modulation rotor 6 rotary speed Ω
3Rotary speed Ω with p-m rotor 7
1To satisfy relational expression (3), hence one can see that the modulation rotor 6 rotary speed Ω
3Rotary speed Ω with p-m rotor 7
1Have certain no-load voltage ratio, regulate that either party rotating speed all can make the opposing party's rotating speed change in the two;
Describe the generation principle of formula (1) below, if the stationary magnetic field " rotation " that stator 5 is produced, promptly when stator winding 5-1 feeds symmetrical alternating current generation stator rotating magnetic field, can derive the rotary speed Ω of stator rotating magnetic field according to the magnetic field modulation principle
2Rotary speed Ω with modulation rotor 6
3Rotary speed Ω with p-m rotor 7
1Satisfy relational expression (1).Therefore, as the speed Ω of internal layer p-m rotor 7
1Under the constant situation, regulate the rotary speed Ω of stator rotating magnetic field
2, can realize modulating the rotation rotating speed Ω of rotor 6
3Adjusting.This shows the rotary speed Ω of modulation rotor 6
3Be rotary speed Ω by p-m rotor 7
1Rotary speed Ω with the stator rotating magnetic field
2Common decision.
To sum up, double-rotor machine of the present invention is regulated rotating speed according to the frequency f of the electric current of formula (1) adjusting feeding stator winding 5-1.
Embodiment two: present embodiment is described below in conjunction with Fig. 1 and Fig. 2, the difference of present embodiment and execution mode one is, permanent magnet unit 7-1 is arranged on the outer round surface of p-m rotor 7-2 unshakable in one's determination, permanent magnet unit 7-1 radially magnetizes or parallel magnetization radially, and other structure is identical with execution mode one with connected mode.
Embodiment three: present embodiment is described below in conjunction with Fig. 3 and Fig. 4, the difference of present embodiment and execution mode one is, permanent magnet unit 7-1 embeds in the outer round surface that is arranged on p-m rotor 7-2 unshakable in one's determination, permanent magnet unit 7-1 radially magnetizes or parallel magnetization radially, and other structure is identical with execution mode one with connected mode.
Embodiment four: present embodiment is described below in conjunction with Fig. 5 and Fig. 6, the difference of present embodiment and execution mode one is, the cross section of permanent magnet unit 7-1 is a rectangle, 2n permanent magnet unit 7-1 is that the center distributes at the inner radiation shape of p-m rotor 7-2 unshakable in one's determination with p-m rotor output shaft 1, the magnetizing direction of permanent magnet unit 7-1 is parallel magnetization tangentially, and other structure is identical with execution mode one with connected mode.
P-m rotor belongs to magnetism-collected structure in the present embodiment, and under the parallel connection effect of p-m rotor adjacent permanent magnet, making has two permanent magnets to provide magnetic flux to air gap under every pole field, can improve air gap flux density, especially more outstanding under the more situation of number of poles.
Embodiment five: present embodiment is described below in conjunction with Fig. 7 and Fig. 8, the difference of present embodiment and execution mode one is, the cross section of permanent magnet unit 7-1 is a rectangle, 2n permanent magnet unit 7-1 is that the center is uniform in the inside of p-m rotor 7-2 unshakable in one's determination with p-m rotor output shaft 1, the angle of every two adjacent permanent magnets unit 7-1 is 360 °/2n, the magnetizing direction of permanent magnet unit 7-1 is parallel magnetization radially, and other structure is identical with execution mode one with connected mode.
Embodiment six: present embodiment is described below in conjunction with Fig. 9 and Figure 10, the difference of present embodiment and execution mode one is, the permanent magnet that each permanent magnet unit 7-1 is a rectangle by two cross sections constitutes V font structure, the magnetizing direction of two permanent magnets is respectively perpendicular to two limits of V font, and point to the opening direction of V font simultaneously or deviate from the opening direction of V font simultaneously, the permanent magnet unit 7-1 of 2n V font is the inside that the center is distributed on p-m rotor 7-2 unshakable in one's determination with p-m rotor output shaft 1, the opening of V font is opening outwardly radially, and other structure is identical with execution mode one with connected mode.
P-m rotor belongs to magnetism-collected structure in the present embodiment, and under the parallel connection effect that constitutes V font adjacent permanent magnet, making has two permanent magnets to provide magnetic flux to air gap under every pole field, can improve air gap flux density.
Claims (8)
1. radial magnetic field modulated brushless double rotor motor, it comprises housing (4), stator (5), p-m rotor (7) and p-m rotor output shaft (1), it is characterized in that, it also comprises modulation rotor (6) and modulates rotor output shaft (9),
Stator (5) is fixed on the madial wall of housing (4), p-m rotor (7) is fixed on the p-m rotor output shaft (1), modulation rotor (6) is positioned between stator (5) and the p-m rotor (7), p-m rotor output shaft (1) is rotationally connected by clutch shaft bearing (2) and housing (4), and p-m rotor output shaft (1) is rotationally connected with modulation rotor (6) by second bearing (3) and the 4th bearing (10), one end of modulation rotor output shaft (9) is fixed on the modulation rotor (6), and modulation rotor output shaft (9) is rotationally connected by the 3rd bearing (8) and housing (4); Between modulation rotor (6) and the stator (5) air gap L1 is arranged; Between modulation rotor (6) and the p-m rotor (7) air gap L2 is arranged,
Stator (5) by stator core (5-2) and m mutually stator winding (5-1) constitute, when stator winding (5-1) is connected with the symmetrical alternating current of m, form the rotating magnetic field of 2p number of poles, m, p are positive integer;
P-m rotor (7) is made of p-m rotor iron core (7-2) and 2n permanent magnet unit (7-1), 2n permanent magnet unit (7-1) is along the circumferential direction evenly arranged evenly, 2n permanent magnet unit (7-1) embeds p-m rotor iron core (7-2) inside or is fixed on the outer round surface of p-m rotor iron core (7-2), the magnetizing direction of adjacent two permanent magnet units (7-1) is opposite, during p-m rotor (7) rotation, form the p-m rotor Surface field of 2n number of poles, n is a positive integer;
Modulation rotor (6) is by rotor field spider (6-3), q piece magnetic inductive block (6-1) and q piece collets (6-2) formation, rotor field spider (6-3) outer round surface along the circumferential direction be crisscross arranged magnetic inductive block (6-1) and collets (6-2);
And satisfy the p=|hn+kq| relational expression and set up, wherein, h is a positive odd number, and k is an integer.
2. radial magnetic field modulated brushless double rotor motor according to claim 1, it is characterized in that, stator core (5-2) is an annular, its internal circular surfaces has a plurality of grooves vertically, the open centre line of described a plurality of grooves evenly distributes around p-m rotor output shaft (1), and stator winding (5-1) embeds respectively and forms the m phase winding in the described groove.
3. radial magnetic field modulated brushless double rotor motor according to claim 1 is characterized in that, permanent magnet unit (7-1) is arranged on the outer round surface of p-m rotor iron core (7-2), and permanent magnet unit (7-1) radially magnetizes or parallel magnetization radially.
4. radial magnetic field modulated brushless double rotor motor according to claim 1, it is characterized in that, permanent magnet unit (7-1) embeds and to be arranged in the outer round surface of p-m rotor iron core (7-2), and permanent magnet unit (7-1) radially magnetizes or parallel magnetization radially.
5. radial magnetic field modulated brushless double rotor motor according to claim 1, it is characterized in that, the cross section of permanent magnet unit (7-1) is a rectangle, to be the center with p-m rotor output shaft (1) distribute at the inner radiation shape of p-m rotor iron core (7-2) 2n permanent magnet unit (7-1), and the magnetizing direction of permanent magnet unit (7-1) is parallel magnetization tangentially.
6. radial magnetic field modulated brushless double rotor motor according to claim 1, it is characterized in that, the cross section of permanent magnet unit (7-1) is a rectangle, 2n permanent magnet unit (7-1) is that the center is uniform in the inside of p-m rotor iron core (7-2) with p-m rotor output shaft (1), the angle of every two adjacent permanent magnets unit (7-1) is 360 °/2n, and the magnetizing direction of permanent magnet unit (7-1) is parallel magnetization radially.
7. radial magnetic field modulated brushless double rotor motor according to claim 1, it is characterized in that, the permanent magnet that each permanent magnet unit (7-1) is a rectangle by two cross sections constitutes V font structure, the magnetizing direction of two permanent magnets is respectively perpendicular to two limits of V font, and point to the opening direction of V font simultaneously or deviate from the opening direction of V font simultaneously, the permanent magnet unit of 2n V font (7-1) is the inside that the center is distributed on p-m rotor iron core (7-2) with p-m rotor output shaft (1), and the opening of V font is opening outwardly radially.
8. radial magnetic field modulated brushless double rotor motor according to claim 1 is characterized in that, magnetic inductive block (6-1) is selected soft-magnetic composite material, silicon steel sheet, solid-iron or soft magnetic ferrite for use.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102741679A CN101951090B (en) | 2010-09-07 | 2010-09-07 | Radial magnetic field modulating brushless double-rotor motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102741679A CN101951090B (en) | 2010-09-07 | 2010-09-07 | Radial magnetic field modulating brushless double-rotor motor |
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| CN101951090A true CN101951090A (en) | 2011-01-19 |
| CN101951090B CN101951090B (en) | 2011-11-23 |
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| CN102386733A (en) * | 2011-11-04 | 2012-03-21 | 国电联合动力技术有限公司 | Mixed type medium-speed permanent magnet wind generator and generator set thereof |
| CN102868268A (en) * | 2011-07-03 | 2013-01-09 | 余虹锦 | Novel air gap magnetic field electromagnetic modulation permanent magnet motor with double squirrel cage structure |
| CN103595217A (en) * | 2013-11-15 | 2014-02-19 | 南京航空航天大学 | Permanent magnetic linear motor provided with no yoke portions on secondary and capable of conducting bilateral magnetic flow switching |
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| CN102386733B (en) * | 2011-11-04 | 2013-10-09 | 国电联合动力技术有限公司 | Mixed type medium-speed permanent magnet wind generator and generator set thereof |
| CN102386733A (en) * | 2011-11-04 | 2012-03-21 | 国电联合动力技术有限公司 | Mixed type medium-speed permanent magnet wind generator and generator set thereof |
| CN103595217B (en) * | 2013-11-15 | 2016-10-19 | 南京航空航天大学 | Secondary without yoke portion bilateral magnetic flux switching permanent-magnetism linear motor |
| CN103595217A (en) * | 2013-11-15 | 2014-02-19 | 南京航空航天大学 | Permanent magnetic linear motor provided with no yoke portions on secondary and capable of conducting bilateral magnetic flow switching |
| CN104377917A (en) * | 2014-12-10 | 2015-02-25 | 哈尔滨工业大学 | Radial-axial magnetic field electromagnetic planetary gear power divider |
| CN104377915A (en) * | 2014-12-10 | 2015-02-25 | 哈尔滨工业大学 | Radial-radial magnetic field electromagnetic planetary gear power divider |
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| CN104578630A (en) * | 2015-01-08 | 2015-04-29 | 东南大学 | Double-stator permanent magnet brushless doubly-fed wind generator |
| CN104600930B (en) * | 2015-01-08 | 2017-06-16 | 东南大学 | Permanent magnet excitation brushless dual-feedback wind power generator |
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