CN104377921B - A kind of permanent-magnet magnetic resistance type double-rotor machine - Google Patents

Abstract

The invention discloses a permanent magnet reluctance type double-rotor motor, comprising a stator, an outer rotor, an inner rotor, an inner shaft, an outer shaft, a keel, a casing, an outer shaft, an inner shaft, a slip ring, an inner motor power converter, External motor power converter, energy storage device and two supports. The invention meets the requirements of the electric stepless speed regulation system by combining the advantages of the high power density of the permanent magnet motor and the good heat dissipation structure of the reluctance motor.

Description

A permanent magnet reluctance type double rotor motor

technical field

The invention belongs to the technical field of motors, and relates to a double-rotor motor, in particular to a permanent magnet reluctance type double-rotor motor.

Background technique

As the most important part of hybrid electric vehicles, dual-rotor motors naturally become a research hotspot. At present, there have been many researches on dual-rotor motors. Including permanent magnet type double rotor motor, reluctance type double rotor motor, asynchronous type double rotor motor. The double-rotor motor with the above structure has its advantages, but also has many disadvantages. Although the permanent magnet double-rotor motor has high power density, it is expensive; although the reluctance type double-rotor motor has a good heat dissipation structure, its torque fluctuation is large and the power density is low; the asynchronous double-rotor motor, although its price Cheap, but its efficiency is low.

Patent Nos. CN103219842A and CN1945939A both disclose a dual-mechanical port motor, which belongs to a dual-rotor motor. The double mechanical port motor disclosed in the patent literature of Patent No. CN10321984A comprises a stator, an outer rotor and an inner rotor. In order to solve the problem of low reliability of the motor caused by the brushes, the outer rotor adopts multi-phase short-circuit windings, and the inner rotor is pasted with permanent magnets. This saves the need for brushes. However, the problem with this structure is that the inner motor formed by the inner rotor and the outer rotor is uncontrollable when the dual mechanical port motor is working, resulting in low efficiency of the dual mechanical port motor. The patent document of patent No. CN1945939A discloses a permanent magnet type double mechanical port motor. The advantages of this motor are high power density and small size, but this structure has poor heat dissipation. Patent No. CN101106308A discloses a reluctance-type four-port electromechanical energy converter, which is essentially a reluctance-type dual-rotor motor, and the stator, outer rotor and inner rotor are all double-salient pole structures. This structure has good heat dissipation, but this structure has a large volume and large torque fluctuations, and especially cannot meet the needs of electric stepless speed regulation systems including hybrid vehicles.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art, and to provide a permanent magnet reluctance type double-rotor motor. speed system requirements.

In order to achieve the above object, the permanent magnet reluctance type double-rotor motor of the present invention includes a stator, an outer rotor, an inner rotor, an inner shaft, an outer shaft, a keel, a casing, an outer shaft, an inner shaft, a slip ring, and an inner motor power Converter, external motor power converter, energy storage device and two brackets;

The bracket, the stator, the outer rotor, the inner shaft and the outer shaft are all arranged in the housing, and the two ends of the stator, the two ends of the outer rotor, and the two ends of the inner rotor are respectively movably connected with the two brackets, and the stator, the outer rotor and the The inner rotor is set coaxially from outside to inside, the stator is fixed on the inner side of the casing, there is an outer air gap between the outer rotor and the stator, and an inner air gap between the outer rotor and the inner rotor, and one end of the outer shaft passes through the inside of the casing The rear end cover is connected to the outer rotor through the keel, one end of the inner shaft passes through the front cover of the casing and a bracket to connect with the inner shaft, and the keel passes through the other bracket;

The iron core of the stator and the iron core of the inner rotor are respectively wound with stator windings and inner rotor windings. The slip ring is sleeved on the inner shaft. It is connected with the power converter of the external motor, and both the power converter of the internal motor and the power converter of the external motor are connected with the energy storage device.

The iron core of the stator and the iron core of the outer rotor are double salient pole structures;

The iron core of the inner rotor is a cylindrical structure.

The outer rotor is provided with several slots, and permanent magnets are embedded in each slot, and the polarities of the permanent magnets are alternately arranged along the circumferential direction of the iron core of the outer rotor and magnetized along the tangential direction.

The permanent magnet is a cubic permanent magnet.

The number of pole pairs of the permanent magnet is 2, and both the stator and the outer rotor have a 12/8 double salient pole structure.

The stator winding is a three-phase concentrated winding, and the three phases in the three-phase concentrated winding are arranged in sequence at an electrical angle of 60°.

The inner rotor winding is a three-phase symmetrical winding, and the three phases in the three-phase symmetrical winding are arranged in sequence at an electrical angle of 120°.

It also includes a resolver for detecting position information and speed information of the outer rotor and the inner rotor.

The outer rotor is provided with a through hole, and the outer rotor is connected with the keel through the through hole.

The inner rotating shaft is connected with the front end cover of the casing through the first bearing;

The inner rotating shaft is connected with the bracket through the second bearing;

The outer rotating shaft is connected with the rear end cover of the casing through the third bearing.

The present invention has the following beneficial effects:

The permanent magnet reluctance type double-rotor motor of the present invention comprises a stator, an outer rotor and an inner rotor, wherein the stator and the outer rotor form a permanent magnet motor, and the outer rotor and the inner rotor form a permanent magnet motor, and the stator, the outer rotor and the inner rotor are composed of It is arranged coaxially from outside to inside, small in size and easy to dissipate heat. The iron core of the stator and the iron core of the inner rotor are respectively wound with stator windings and inner rotor windings. The overflow is connected with the power converter of the external motor. When working, the engine outputs energy to the car through the invention. When the energy output by the engine is surplus, the excess energy is stored in the energy storage device. When the energy output by the generator is insufficient At the same time, the energy storage device can supplement the insufficient remaining energy of the engine, and at the same time, through the coupling between the inner rotor and the outer rotor, energy transmission and distribution can be achieved to meet the needs of the electric stepless speed regulation system.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a sectional view of the body of the present invention along the radial direction;

Fig. 3 is a cross-sectional view of the body of the present invention along the axial direction;

Fig. 4 is a sectional view of the inner rotor 3 along the axial direction in the present invention;

Fig. 5 is a sectional view of the inner rotor 3 along the radial direction in the present invention;

Fig. 6 is a sectional view of the stator 1 along the axial direction in the present invention;

Fig. 7 is a sectional view of the stator 1 in the radial direction according to the present invention.

Among them, 1 is the stator, 2 is the outer rotor, 3 is the inner rotor, 4 is the inner air gap, 5 is the outer air gap, 6 is the inner shaft, 7 is the outer shaft, 8 is the casing, 9 is the front end cover 9, 10 11 is the bracket, 12 is the keel, 131 is the first bearing, 132 is the second bearing, 133 is the third bearing, 14 is the slip ring, 15 is the power converter of the inner motor, and 16 is the power conversion of the outer motor 17 is an energy storage device, 18 is a through hole, 19 is a stator winding, 20 is a permanent magnet, and 21 is an inner rotor winding.

detailed description

The present invention is described in further detail below in conjunction with accompanying drawing:

Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, the permanent magnet reluctance type dual-rotor motor according to the present invention includes a stator 1, an outer rotor 2, an inner rotor 3, and an inner shaft 6 , outer shaft 7, keel 12, casing 8, outer shaft 7, inner shaft 6, slip ring 14, inner motor power converter 15, outer motor power converter 16, energy storage device 17 and two supports 11; The bracket 11, the stator 1, the outer rotor 2, the inner shaft 6 and the outer shaft 7 are all arranged in the housing, and the two ends of the stator 1, the two ends of the outer rotor 2 and the two ends of the inner rotor 3 are respectively movable with the two brackets 11. Connection, the stator 1, the outer rotor 2 and the inner rotor 3 are arranged coaxially from outside to inside, the stator 1 is fixed on the inner side of the casing 8, there is an outer air gap 5 between the outer rotor 2 and the stator 1, and the outer rotor 2 and the inner rotor 3, there is an inner air gap 4, one end of the outer shaft 7 passes through the rear end cover 10 of the casing 8 and is connected to the outer rotor 2 through the keel 12, and one end of the inner shaft 6 passes through the front end cover 9 of the casing 8 and One bracket 11 is connected with the inner shaft 6, and the keel 12 passes through the other bracket 11; the iron core of the stator 1 and the iron core of the inner rotor 3 are respectively wound with stator windings 19 and inner rotor windings 21, and the slip ring 14 is sleeved in the inner On the rotating shaft 6, the lead out of the inner rotor winding 21 is connected to the power converter 15 of the inner motor through the slip ring 14, the lead out of the stator winding 19 is connected to the power converter 16 of the outer motor, and the power converter 15 of the inner motor is connected to the power converter of the outer motor The devices 16 are all connected with the energy storage device 17.

It should be noted that the core of the stator 1 and the core of the outer rotor 2 are double salient pole structures, the core of the inner rotor 3 is a cylindrical structure, and the outer rotor 2 is provided with a number of slots, each of which is Embedded with permanent magnets 20, the polarities of the permanent magnets 20 are alternately arranged along the circumferential direction of the iron core of the outer rotor 2 and magnetized along the tangential direction. The permanent magnets 20 are cubic permanent magnets, and the number of pole pairs of the permanent magnets 20 is 2. The stator 1 And the outer rotor 2 is a 12/8 double salient pole structure, the stator winding 19 is a three-phase concentrated winding, the three phases in the three-phase concentrated winding are arranged in sequence at an electrical angle of 60°, and the inner rotor winding 21 is a three-phase symmetrical winding, so In the three-phase symmetrical winding, the three phases are arranged in sequence at an electrical angle of 120°. The present invention also includes a rotary transformer for detecting the position information and speed information of the outer rotor 2 and the inner rotor 3, the outer rotor 2 is provided with a through hole 18, the outer rotor 2 is connected with the keel 12 through the through hole 18, and the inner rotor 2 The rotating shaft 6 is connected to the front end cover 9 of the casing 8 through the first bearing 131, the inner rotating shaft 6 is connected to the bracket 11 through the second bearing 132, and the outer rotating shaft 7 is connected to the rear end cover 10 of the casing 8 through the third bearing 133. connect.

When the permanent magnet reluctance type dual-rotor motor of the present invention is applied to a hybrid electric vehicle, the outer shaft 7 is an output shaft directly connected to the transmission shaft, the inner shaft 6 is an input shaft directly connected to the output end of the engine, and the inner shaft 6 is directly connected to the output end of the engine. The motor power converter 15 and the external motor power converter 16 are connected through the energy storage device 17. When the hybrid vehicle is working, the engine outputs energy to the vehicle through the present invention. When the energy output by the engine is surplus, the excess energy can be stored in the storage In the energy device 17, when the energy output by the engine is insufficient, the energy storage device 17 can provide the remaining insufficient energy for the present invention.

In an actual implementation, the number of pole pairs of the permanent magnet 20 is not limited to two pairs of poles, as long as the number of pole pairs can be matched. At the same time, the shape of the permanent magnet 20 is not limited to a cube, and permanent magnets 20 of other shapes also Can try.

Claims (7)

1. A permanent magnet reluctance type dual-rotor motor is characterized in that it comprises a stator (1), an outer rotor (2), an inner rotor (3), an inner rotating shaft (6), an outer rotating shaft (7), a keel (12 ), casing (8), slip ring (14), inner motor power converter (15), outer motor power converter (16), energy storage device (17) and two brackets (11); Described support (11), stator (1), outer rotor (2), inner rotating shaft (6) and outer rotating shaft (7) are all arranged in the casing (8), and one end of keel (12) and a support (11 ), the other end of the keel (12) passes through the outer rotor (2) and connects with another bracket (11), the two ends of the stator (1), the two ends of the outer rotor (2) and the inner rotor (3) The two ends of the two brackets (11) are respectively movably connected, the stator (1), the outer rotor (2) and the inner rotor (3) are arranged coaxially from the outside to the inside, and the stator (1) is fixed on the casing (8) There is an outer air gap (5) between the outer rotor (2) and the stator (1), an inner air gap (4) exists between the outer rotor (2) and the inner rotor (3), and the outer shaft (7) One end passes through the rear end cover (10) of the casing (8) and is connected to the outer rotor (2) through the bracket (11) on one side of the rear end cover (10), and one end of the inner rotating shaft (6) passes through the casing The front end cover (9) of (8) is flexibly connected with the support (11) on one side of the front end cover (9); The iron core of the stator (1) and the iron core of the inner rotor (3) are respectively wound with stator windings (19) and inner rotor windings (21), the slip ring (14) is sleeved on the inner shaft (6), and the inner rotor windings The drawing of (21) is connected with inner motor power converter (15) by slip ring (14), and the drawing of stator winding (19) is connected with outer motor power converter (16), and inner motor power converter (15) Both the external motor power converter (16) is connected with the energy storage device (17); The inner rotating shaft (6) is connected with the front end cover (9) of the casing (8) through the first bearing (131); The inner rotating shaft (6) is connected with the bracket (11) through the second bearing (132); The iron core of the stator (1) and the iron core of the outer rotor (2) are double salient pole structures; The iron core of the inner rotor (3) is a cylindrical structure; The outer rotor (2) is provided with a number of slots, and permanent magnets (20) are embedded in each slot, and the polarities of the permanent magnets (20) are arranged alternately along the circumferential direction of the iron core of the outer rotor (2) and along the Tangential magnetization. 2. The permanent magnet reluctance type dual-rotor motor according to claim 1, characterized in that, the permanent magnet (20) is a cubic permanent magnet. 3. The permanent magnet reluctance type double-rotor motor according to claim 1, characterized in that, the number of pole pairs of the permanent magnet (20) is 2, and the number of pole pairs of the stator (1) and the outer rotor (2) is 12/8 double salient structure. 4. The permanent magnet reluctance type double-rotor motor according to claim 1, characterized in that, the stator winding (19) is a three-phase concentrated winding, and the three phases in the three-phase concentrated winding are followed by an electrical angle of 60° arrangement. 5. The permanent magnet reluctance type double-rotor motor according to claim 1, wherein the inner rotor winding (21) is a three-phase symmetrical winding, and the three phases in the three-phase symmetrical winding are separated by an electrical angle of 120°. Arranged in order. 6. The permanent magnet reluctance type double-rotor motor according to claim 1, further comprising a rotary transformer for detecting position information and speed information of the outer rotor (2) and the inner rotor (3). 7. The permanent magnet reluctance type dual-rotor motor according to claim 1, characterized in that, The outer rotating shaft (7) is connected with the rear end cover (10) of the casing (8) through a third bearing (133).