CN201726279U

CN201726279U - Coaxial birotor permanent magnet DC motor

Info

Publication number: CN201726279U
Application number: CN2010202767941U
Authority: CN
Inventors: 张梅; 张修德; 邓传义
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-07-19
Filing date: 2010-07-19
Publication date: 2011-01-26
Anticipated expiration: 2020-07-19

Abstract

The utility model discloses a coaxial birotor permanent magnet DC motor belonging to the technical field of motors. The motor comprises a housing 6, a left end cover 14, a right end cover 4, a left end bearing 13, a right end bearing 5 and a motor shaft 2, wherein more than two pairs of permanent magnets 10 arranged in a polarity staggered way are fixed on the outer cylindrical surface of the motor shaft 2; a squirrel cage auxiliary rotor formed by a squirrel cage frame 11 and squirrel cage bars 8 is sleeved on the outer cylindrical surfaces of the permanent magnets 10; and a stator assembly formed by a stator core 12 and a stator winding 7 arranged on the stator core is fixedly mounted on the inner wall of the housing 6. The motor provided by the utility model has high energy conversion efficiency, can improve motor power under the condition that the volumes are identical, and can be widely applied in high power electric appliances as electric cars, electro-tricycles and the like.

Description

A kind of coaxial double-rotor permanent magnet direct current motor

Technical field

The utility model relates to technical field of motors, particularly a kind of coaxial double-rotor permanent magnet direct current motor in the magneto field.

Background technology

In the prior art, the mode that permanent magnet DC motor mostly adopts stator winding and permanent magnet rotor to cooperate, this motor in use, the electric energy of its stator input is converted into magnetic field, promotes the permanent magnet rotor rotation.Because in the course of the work, stator will promote permanent magnet rotor and normally rotate, and just must import certain electric energy, and after stator promotes the normal rotation of permanent magnet rotor, also have the part magnetic field energy not obtain utilization, so the energy conversion efficiency of this motor is lower.Simultaneously, because the volume of the magnetic field intensity of permanent magnet and permanent magnet is closely related, thereby the power of motor and the volume of motor are proportional, are unfavorable for the miniaturization development of motor.

Summary of the invention

At the existing in prior technology deficiency, it is higher and can improve the permanent magnet DC motor of power of motor under the condition of equal volume that technical problem to be solved in the utility model provides a kind of energy conversion efficiency.

Technical solution adopted in the utility model is a kind of coaxial double-rotor permanent magnet direct current motor of design: be made of casing 6, left end cap 14, right end cap 4, left end bearing 13, right-hand member bearing 5 and motor shaft 2;

A, on the external cylindrical surface of motor shaft 2, be fixed with more than at least two pairs, the staggered permanent magnet 10 of polarity, on the outer cylinder of permanent magnet 10, also be set with the secondary rotor of the squirrel-cage that constitutes by mouse cage frame 11 and squirrel-cage bar 8;

B, on the inwall of casing 6, be fixed with the stator module that constitutes by stator core 12 and thereon stator winding 7 of dress.

Coaxial double-rotor permanent magnet direct current motor of the present utility model is the secondary rotor of suit squirrel-cage on the permanent magnet rotor cylindrical, forms permanent magnet and squirrel-cage coaxial birotor.Thereby, in use, the magnetic field that stator produced, when driving the permanent magnet rotor rotation, also can allow be sleeved on the squirrel-cage bar cutting magnetic line in the secondary rotor of squirrel-cage on the permanent magnet rotor and produce short circuit current, make the secondary rotor stack of the secondary cage of squirrel-cage and being strengthened, therefore, its power output increases, and the transformation efficiency of energy also is greatly improved, and helps the miniaturization of motor.According to prototyping testing, coaxial double-rotor permanent magnet direct current motor of the present utility model is compared with existing similar motor, and its efficient is greatly improved.

Description of drawings

Fig. 1 is a main cross-sectional schematic of the present utility model;

Fig. 2 is a left cross-sectional schematic of the present utility model.

Among the figure: the 1st, armature keyway, the 2nd, motor shaft, the 3rd, right sealing ring, the 4th, right end cap, the 5th, right-hand member bearing, the 6th, casing, the 7th, stator winding, the 8th, squirrel-cage bar, the 9th, suspension ring, the 10th, permanent magnet, the 11st, mouse cage frame, the 12nd, stator core, the 13rd, the left end bearing, the 14th, left end cap, the 15th, left sealing ring, the 16th, power input line box.

Embodiment

Below in conjunction with drawings and Examples, the utility model is further described.

Present embodiment is to be made of casing 6, left end cap 14, right end cap 4, left end bearing 13, right-hand member bearing 5, motor shaft 2, permanent magnet rotor, the secondary rotor of squirrel-cage and stator core 12 and stator winding 7.

Casing 6 is a cylindrical shell, and its underpart has pedestal, and suspension ring 9 are housed in the middle of the top, the stator module that the cylinder inboard wall fixed installation is made of stator winding 7 and stator core 12 (silicon steel sheet is formed by stacking); In the position, middle and upper part of cylindrical shell cylindrical rear side, the power input line box 16 of stator winding 7 is housed.

Motor shaft 2 is two-way multidiameter, be fixed with four on the external cylindrical surface of intermediate portion to (can be two pairs or three pairs or five pairs or six pairs or how right, this example is designed to four pairs, that is: eight) permanent magnet 10 of the staggered high-intensity magnetic field intensity of polarity, constitute permanent magnet rotor; On the outer cylinder of permanent magnet 10, also be set with the mouse cage frame of making by iron core (the silicon steel sheet closed assembly forms) 11, this mouse cage frame 11 is a sleeve-like, on its barrel, axially be coated with quantity and be the squirrel-cage bar 8 (that is: ten six roots of sensation) of two times of the numbers of poles of permanent magnet 10, constitute the secondary rotor of squirrel-cage; Secondary rotor of squirrel-cage and permanent magnet rotor are fixed as one, and form coaxial birotor.

Coaxial birotor is installed in the axially extending bore of the stator core 12 in the casing 6, and the left end of its motor shaft 2 installs left end bearing 13 and left end cap 14, and left sealing ring 15 also is housed in the axis hole of left end cap 14, and left end cap 14 is fixed on the left end of casing 6; The right-hand member of its motor shaft 2 installs right-hand member bearing 5 and right end cap 4, and right sealing ring 3 also is housed in the axis hole of right end cap 4, and right end cap 4 is fixed on the right-hand member of casing 6; The right-hand member of motor shaft 2 becomes motor output shaft after passing right end cap 4, has armature keyway 1 in its end.

During use, the pedestal with casing 6 bottoms is fixed on the frame earlier, and DC power supply is introduced by power input line box 16, to stator winding 7, produces excitation field, drives permanent magnet 10 and rotates together with motor shaft 2 (that is: permanent magnet rotor); Meanwhile, be sleeved on the secondary rotor of squirrel-cage on the permanent magnet rotor also along with rotation, squirrel-cage bar 8 wherein is cutting magnetic line and produce short circuit current immediately, make the secondary rotor of squirrel-cage also become a magnet, the excitation field that is produced by stator winding 7 drives and rotates too, and at this moment, the suffered field drives power of rotor is superposeed by permanent magnet rotor and two kinds of actuating forces of the secondary rotor of squirrel-cage and strengthened, thereby increased power output, improved the efficient that electric energy is converted into mechanical energy.

Coaxial double-rotor permanent magnet direct current motor of the present utility model can be widely used in high-power electric appliance fields such as electric automobile, electro-tricycle.

Claims

1. a coaxial double-rotor permanent magnet direct current motor is made of casing (6), left end cap (14), right end cap (4), left end bearing (13), right-hand member bearing (5) and motor shaft (2), it is characterized in that:

A, on the external cylindrical surface of motor shaft (2), be fixed with more than at least two pairs, the staggered permanent magnet of polarity (10), on the outer cylinder of permanent magnet (10), also be set with the secondary rotor of the squirrel-cage that constitutes by mouse cage frame (11) and squirrel-cage bar (8);

B, on the inwall of casing (6), be fixed with the stator module that constitutes by stator core (12) and dress stator winding (7) thereon.