CN101951090A - Radial magnetic field modulating brushless double-rotor motor - Google Patents

Abstract

The radial magnetic field modulation type brushless double-rotor motor belongs to the field of motors. The invention solves the problem that the rotating winding in the existing double-rotor motor needs to introduce current through brushes and slip rings, resulting in a decrease in operating efficiency and reliability, and often requires Maintenance of components such as brushes. The stator of the motor of the present invention is fixed on the inner side wall of the housing, the permanent magnet rotor is fixed on the output shaft of the permanent magnet rotor, the modulation ring rotor is between the stator and the permanent magnet rotor, the permanent magnet rotor output shaft is connected with the housing and the modulation ring rotor Rotational connection, one end of the modulation ring rotor output shaft is fixed on the modulation ring rotor, and is connected to the housing in rotation; the stator is energized to form a 2p pole magnetic field; the 2n permanent magnet units of the permanent magnet rotor are evenly distributed and arranged on the permanent magnet rotor along the circumferential direction On the outer surface of the iron core, the permanent magnet rotor rotates to form a 2n-pole magnetic field; the outer surface of the rotor support of the modulation ring rotor is alternately arranged with q magnetic conductive blocks and q insulating blocks along the circumferential direction; and p=|hn+kq|.

Description

The radial magnetic field modulated brushless double rotor motor

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 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 between stator 5 and 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 is fixed on the modulation rotor 6, and modulation rotor output shaft is rotationally connected with housing 4 by the 3rd bearing 8; 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;

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.

P-m rotor 7 is made of p-m rotor 7-2 unshakable in one's determination and 2n permanent magnet unit 7-1,2n permanent magnet unit 7-1 is along the circumferential direction evenly arranged evenly, it is inner or be fixed on the outer round surface of p-m rotor 7-2 unshakable in one's determination that 2n permanent magnet unit 7-1 embeds p-m rotor 7-2 unshakable in one's determination, the magnetizing direction of adjacent two permanent magnet unit 7-1 is opposite, during p-m rotor 7 rotations, form the p-m rotor Surface field of 2n number of poles, n is a positive integer;

Modulation rotor 6 is made of rotor field spider 6-3, q piece magnetic inductive block 6-1 and q piece collets 6-2, rotor field spider 6-3 outer round surface along the circumferential direction be crisscross arranged magnetic inductive block 6-1 and collets 6-2; Magnetic inductive block 6-1 selects soft-magnetic composite material, silicon steel sheet, solid-iron or soft magnetic ferrite for use;

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:

${\mathrm{\Ω}}_2=\frac{\mathrm{hn}}{|\mathrm{hn}+\mathrm{kq}|}{\mathrm{\Ω}}_1+\frac{\mathrm{kq}}{|\mathrm{hn}+\mathrm{kq}|}{\mathrm{\Ω}}_3---\left(1\right)$

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:

${\mathrm{\Ω}}_2=\frac{\mathrm{hn}}{|\mathrm{hn}+\mathrm{kq}|}{\mathrm{\Ω}}_1---\left(2\right)$

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:

${\mathrm{\Ω}}_3=\frac{-\mathrm{hn}}{\mathrm{kq}}{\mathrm{\Ω}}_1---\left(3\right)$

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 modulation type brushless dual-rotor motor, which includes a housing (4), a stator (5), a permanent magnet rotor (7) and a permanent magnet rotor output shaft (1), is characterized in that it also includes a modulation ring rotor (6) and modulation ring rotor output shaft (9), The stator (5) is fixed on the inner wall of the housing (4), the permanent magnet rotor (7) is fixed on the output shaft (1) of the permanent magnet rotor, and the modulation ring rotor (6) is located between the stator (5) and the permanent magnet rotor ( 7), the permanent magnet rotor output shaft (1) is rotationally connected with the housing (4) through the first bearing (2), and the permanent magnet rotor output shaft (1) is through the second bearing (3) and the fourth bearing ( 10) Rotately connected with the modulating ring rotor (6), one end of the modulating ring rotor output shaft (9) is fixed on the modulating ring rotor (6), and the modulating ring rotor output shaft (9) passes through the third bearing (8) and the housing The body (4) is rotationally connected; there is an air gap L1 between the modulation ring rotor (6) and the stator (5); there is an air gap L2 between the modulation ring rotor (6) and the permanent magnet rotor (7), The stator (5) is composed of a stator core (5-2) and an m-phase stator winding (5-1). When the stator winding (5-1) is passed with an m-phase symmetrical alternating current, a rotating magnetic field with 2p poles is formed, m, p is a positive integer; The permanent magnet rotor (7) is composed of a permanent magnet rotor core (7-2) and 2n permanent magnet units (7-1), the 2n permanent magnet units (7-1) are evenly distributed along the circumferential direction, and the 2n permanent magnets The unit (7-1) is embedded inside the permanent magnet rotor core (7-2) or fixed on the outer circular surface of the permanent magnet rotor core (7-2), and the magnetization of two adjacent permanent magnet units (7-1) In the opposite direction, when the permanent magnet rotor (7) rotates, a surface magnetic field of the permanent magnet rotor with 2n poles is formed, and n is a positive integer; The modulating ring rotor (6) is composed of a rotor bracket (6-3), q pieces of magnetic conductive blocks (6-1) and q pieces of insulating blocks (6-2), and the outer surface of the rotor bracket (6-3) is along the circumferential direction Magnetic permeable blocks (6-1) and insulating blocks (6-2) are arranged staggeredly; And the relationship p=|hn+kq| is satisfied, where h is a positive odd number and k is an integer. 2. The radial magnetic field modulation type brushless dual-rotor motor according to claim 1, wherein the stator core (5-2) is circular, and its inner circular surface is axially provided with a plurality of grooves, so that The opening centerlines of the plurality of slots are evenly distributed around the output shaft (1) of the permanent magnet rotor, and the stator windings (5-1) are respectively embedded in the slots to form m-phase windings. 3. radial magnetic field modulation type brushless dual rotor motor according to claim 1, is characterized in that, permanent magnet unit (7-1) is arranged on the outer circle surface of permanent magnet rotor iron core (7-2), permanent The magnet unit (7-1) is magnetized radially or parallelly. 4. The radial magnetic field modulation type brushless double rotor motor according to claim 1, wherein the permanent magnet unit (7-1) is embedded in the outer circular surface of the permanent magnet rotor core (7-2), The permanent magnet unit (7-1) is magnetized radially or parallelly. 5. radial magnetic field modulation type brushless double-rotor motor according to claim 1, is characterized in that, the cross section of permanent magnet unit (7-1) is rectangle, 2n permanent magnet units (7-1) with permanent magnet unit (7-1) The magnetic rotor output shaft (1) is distributed radially inside the permanent magnet rotor iron core (7-2) as the center, and the magnetization direction of the permanent magnet unit (7-1) is tangential parallel magnetization. 6. The radial magnetic field modulation type brushless dual-rotor motor according to claim 1, characterized in that, the cross section of the permanent magnet unit (7-1) is rectangular, and 2n permanent magnet units (7-1) are in the permanent magnet unit (7-1) The inside of the magnetic rotor iron core (7-2) is uniformly distributed around the permanent magnet rotor output shaft (1), and the angle between every two adjacent permanent magnet units (7-1) is 360°/2n, and the permanent magnet unit ( 7-1) The magnetization direction is parallel magnetization along the radial direction. 7. The radial magnetic field modulation type brushless dual-rotor motor according to claim 1, wherein each permanent magnet unit (7-1) is composed of two permanent magnets with a rectangular cross section to form a V-shaped structure, and the two The magnetization direction of the block permanent magnet is respectively perpendicular to the two sides of the V-shape, and simultaneously points to the opening direction of the V-shape or deviates from the opening direction of the V-shape at the same time, 2n V-shaped permanent magnet units (7-1) are permanently The magnetic rotor output shaft (1) is centered and evenly distributed inside the permanent magnetic rotor iron core (7-2), and the V-shaped opening opens radially outward. 8. The brushless dual-rotor motor with radial magnetic field modulation according to claim 1, characterized in that the magnetic conductive block (6-1) is made of soft magnetic composite material, silicon steel sheet, solid iron or soft ferrite.

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