CN101345440A

CN101345440A - Permanent magnet motor with shaft radial folding winding

Info

Publication number: CN101345440A
Application number: CNA2008100645472A
Authority: CN
Inventors: 郑萍; 沈琳; 孙红超; 罗昌德
Original assignee: Harbin Institute of Technology
Current assignee: Rizhao Jingying Media Technology Co.,Ltd.
Priority date: 2008-05-21
Filing date: 2008-05-21
Publication date: 2009-01-14
Anticipated expiration: 2028-05-21
Also published as: CN101345440B

Abstract

The invention discloses a permanent magnet motor with axial radial folding winding belonging to the motor field. The object of the invention is to solve the problems that the space effective utilization rate of the permanent magnet motor is low and the motor structure is not compact, thereby the torque density and power density are not effectively improved. The permanent magnet motor comprises a stator, a rotor and a shaft, wherein the stator is fixed on the shaft, the rotor arranged exterior of the stator rotationally connects with the shaft, a plurality of axial slots are uniformly distributed on the cylindrical surface of the round stator core, a plurality of radial slots are uniformly distributed in a radial form on the end faces of the two sides of the stator core, the axial slots and the radial slots are one-to-one correspondence and respectively communicate. A stator winding is arranged together on each axial slot and corresponding radial slot, a plurality of first permanent magnets are uniformly distributed on the inner circle wall of the rotor core and uniformly arranged around the shaft. A plurality of second permanent magnets are uniformly distributed in a radial form on the inner surface on each end face of the two sides of the rotor core, and the stator winding is a multiphase symmetric winding.

Description

Magneto with shaft radial folding winding

Technical field

The invention belongs to machine field.

Background technology

Magneto at present commonly used has two kinds of radial flux column permanent-magnet motor and axial magnetic flux disc-type permanent magnet motors, there is a common problem in they is exactly that motor space effective rate of utilization is less, electric machine structure is not compact, can not effectively improve torque density and power density afterwards.

For radial flux column permanent-magnet motor, the influence of hour winding overhang length is relatively large when the motor draw ratio, and when its motor radius was very big, motor shaft was very big to the ratio that the tip lengths of two ends winding accounts for the motor length overall, waste copper cash, increased copper loss; And bottom land is not utilized to a big chunk space of between centers; On the other hand, the permanent magnet axial length of radial flux motors generally can not be processed oversize, all make troubles for when longer transportation and installation, when segmentation is installed technology difficulty big (well-known, two permanent magnets of identical magnetizing direction non-magnetizing direction near the time also will produce very big repulsive force).

For the axial magnetic flux disc-type permanent magnet motor, footpath and outer radius all will stay a big chunk space to give the end winding within it, have so also increased the volume of motor.Current people have taked various measures to shorten tip lengths: adopt and concentrate winding, chain type winding, short distance winding, improve various measures such as wire insertion technology, but these all are limited.Though also have the column type external rotor electric machine of the disc type electric machine of two axial magnetic fluxs and a radial flux combined, utilized the space of radial flux motors bottom land and between centers, make structure become compacter, but because the just combination of three independent winding motors fails to solve the long problem of conventional motors end winding.

Summary of the invention

The space effective rate of utilization that the objective of the invention is to solve present magneto is less, and electric machine structure is not compact, can not effectively improve the problem of torque density and power density afterwards, has designed the magneto with shaft radial folding winding.

The present invention includes stator, rotor and axle, stator is fixed on the axle, rotor is arranged on the outside of stator, be rotationally connected between rotor and the axle, described stator is made up of stator core and stator winding, stator core is an annular, the outer round surface of stator core is provided with a plurality of axial grooves, the open centre line of axial groove is axial, a plurality of axial grooves are evenly distributed round axle, be respectively arranged with a plurality of radial slots on the both sides end face of stator core, it is evenly distributed that the open centre line of a plurality of radial slots is the radiation wire round axle, axial groove is corresponding one by one respectively with the radial slot of stator core both sides end face, and be communicated with respectively, be provided with stator winding jointly in each axial groove with in the stator core both sides end face radial slot corresponding with it, described rotor is by rotor core, first permanent magnet and second permanent magnet are formed, be evenly equipped with a plurality of first permanent magnets on the inner round wall face of rotor core, a plurality of first permanent magnets are evenly distributed round axle, be respectively arranged with a plurality of second permanent magnets on the inner surface on the both sides end face of rotor core, it is evenly distributed that a plurality of second permanent magnets are the radiation wire round axle, and stator winding is heterogeneous symmetric winding.

Advantage of the present invention is:

1, owing to adopted the shaft radial folding winding, the end winding all near axle, has reduced its axial length with respect to circular radial cartridge type motor, has reduced its radius with respect to the axial magnetic flux disc type electric machine, has made full use of the idle space of the inner radius of motor.

2, electric machine structure compactness by a driver element power output independently, can access higher power of motor density and torque density.

3, it need not the mechanical device of deceleration transmission, can be applied in the occasion that needs big torque actuated, substitutes the pattern of traditional motor acceleration and deceleration mechanism, has improved the overall operation efficiency of system.

Description of drawings

Fig. 1 is a structural representation of the present invention, and Fig. 2 is the structural representation of rotor of the present invention, and Fig. 3 is the A-A cutaway view of Fig. 2, and Fig. 4 is the shaft section figure of stator, and Fig. 5 is the end view of stator.

Embodiment

Embodiment one: present embodiment is described below in conjunction with Fig. 1～Fig. 5, present embodiment is by stator, rotor and axle 6 are formed, stator is fixed on the axle 6, rotor is arranged on the outside of stator, described stator is made up of stator core 1 and stator winding 2, stator core 1 is an annular, the outer round surface of stator core 1 is provided with a plurality of axial groove 1-1, the open centre line of axial groove 1-1 is axial, a plurality of axial groove 1-1 are evenly distributed round axle 6, be respectively arranged with a plurality of radial slot 1-2 on the both sides end face of stator core 1, it is evenly distributed that the open centre line of a plurality of radial slot 1-2 is the radiation wire round axle 6, axial groove 1-1 is corresponding one by one respectively with the radial slot 1-2 of stator core 1 both sides end face, and be communicated with respectively, be provided with stator winding 2 jointly in each axial groove 1-1 with in the stator core 1 both sides end face radial slot 1-2 corresponding with it, described rotor is by rotor core 3, first permanent magnet 4 and second permanent magnet 5 are formed, be evenly equipped with a plurality of first permanent magnets 4 on the inner round wall face of rotor core 3, a plurality of first permanent magnets 4 are evenly distributed round axle 6, be respectively arranged with a plurality of second permanent magnets 5 on the inner surface on the both sides end face of rotor core 3, it is evenly distributed that a plurality of second permanent magnets 5 are the radiation wire round axle 6, and the both sides end face of rotor core 3 is respectively by being rotationally connected between a bearing 7 and the axle 6.

Stator winding 2 is heterogeneous symmetric windings, and axle 6 is provided with wire hole 6-1, and stator winding 2 is connected with the three phase sine AC power of outside by wire hole 6-1.

Leave air gap L1 between first permanent magnet 4 and the stator, second permanent magnet 5 on the both sides end face of rotor core 3 respectively and leave air gap L2, L3 between the stator.

The material of stator core 1 and rotor core 3 adopts soft-magnetic composite material, the steel that magnetic conductivity is good, or form by the very little silicon steel sheet stack combinations of eddy current loss.

Operation principle:

The present invention can regard as and external rotor radial magnetic flux drum type brake motor shaft is respectively got a segment length to two ends form along the direction at circumference outer radial axle place is folding respectively, the conventional radial motor shaft all only exists near axle to the end winding of the end at two ends winding or traditional disc type electric machine outer radius like this, the axial length and the external diameter of motor have been reduced, make full use of the idle space of motor inner radius, be expected to improve the output power density and the torque density of motor.

Owing to this diameter of axle is to be developed by radial motor to motor, so still pass through an independently driver element power output.After stator winding 2 connected with delta connection or star connection, the wire hole 6-1 by axle 6 was connected with outside three phase sine AC power.When stator winding 2 passes to three-phase alternating current, in axial air-gap L2, the L3 at the radial air gap L1 of motor and two ends, produce a rotating magnetic field that rotating speed is identical respectively, the three drags rotor jointly in the same way with the speed rotation, and the iron core shell of rotor is as the rotary power output.

Claims

1, magneto with shaft radial folding winding, it comprises stator, rotor and axle (6), stator is fixed on the axle (6), rotor is arranged on the outside of stator, be rotationally connected between rotor and the axle (6), it is characterized in that described stator is made up of stator core (1) and stator winding (2), stator core (1) is an annular, the outer round surface of stator core (1) is provided with a plurality of axial grooves (1-1), the open centre line of axial groove (1-1) is axial, a plurality of axial grooves (1-1) are evenly distributed round axle (6), be respectively arranged with a plurality of radial slots (1-2) on the both sides end face of stator core (1), it is evenly distributed that the open centre line of a plurality of radial slots (1-2) is the radiation wire round axle (6), axial groove (1-1) is corresponding one by one respectively with the radial slot (1-2) of stator core (1) both sides end face, and be communicated with respectively, be provided with stator winding (2) jointly in the radial slot (1-2) that each axial groove (1-1) is interior and stator core (1) both sides end face is corresponding with it, described rotor is by rotor core (3), first permanent magnet (4) and second permanent magnet (5) are formed, be evenly equipped with a plurality of first permanent magnets (4) on the inner round wall face of rotor core (3), a plurality of first permanent magnets (4) are evenly distributed round axle (6), be respectively arranged with a plurality of second permanent magnets (5) on the inner surface on the both sides end face of rotor core (3), it is evenly distributed that a plurality of second permanent magnets (5) are the radiation wire round axle (6), and stator winding (2) is heterogeneous symmetric winding.

2, the magneto with shaft radial folding winding according to claim 1, it is characterized in that stator core (1) and rotor core (3) adopt the soft-magnetic composite material material, the steel that magnetic conductivity is good, or form by the very little silicon steel sheet stack combinations of eddy current loss.