CN1091321C

CN1091321C - Disk-type permanent-magnet electric machine with stepless speed regulation

Info

Publication number: CN1091321C
Application number: CN99107913A
Authority: CN
Inventors: 陶国珍
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-06-02
Filing date: 1999-06-02
Publication date: 2002-09-18
Anticipated expiration: 2019-06-02
Also published as: CN1276645A

Abstract

The present invention relates to a disk-type permanent-magnet electric machine with stepless speed regulation, which is composed of a machine casing, a bearing, a stator, a rotor and an output shaft, wherein both the stator and the rotor have a disk-type structure. The electric machine is also provided with a stepless speed regulation part which interacts with the rotor in an electromagnetic clutch mode to obtain the purpose of speed regulation. The present invention has the advantages of large torque, high efficiency and small axial dimension, and the present invention can satisfy the requirement of speed regulation driving and is especially suitable for the driving of the wheels of an electric car.

Description

Disk-type permanent-magnet electric machine with stepless speed regulation

The present invention relates to a kind of disk-type permanent-magnet electric machine with stepless speed regulation.

Magneto generally is designed to concentric rotor and stator, forms radial air gap, and rotor and stator are done relative motion, and electric energy is transformed into mechanical energy.But, come drive wheels as needing little electronic of axial dimension in the electric automobile, so disc-type permanent magnet motor occurred in some application scenarios.By Chinese patent CN1054151A a kind of disk permanent-magnet dc motor is disclosed for example, in this motor, permanent magnet is packed on the rotating irony disk, coil stationary is on an insulation board, several insulation boards that disk of magnet are housed and coil is housed axially alternately, form axial air-gap, except that the only inboard single face of irony disk at the two ends of axle is equipped with the magnet, magnet all is equipped with in middle irony disk both sides.Commutator, the brush of DC power supply by axle head makes and produces alternating magnetic field in the coil, and the coil on the insulation board passes the magnetic field that the corresponding magnet with both sides in magnetic field of its generation of insulation board produces and has an effect, and the disk that promotes to be equipped with magnet rotates.

This disc-type permanent magnet motor has simple in structure, saves material, and torque is big, the advantage that efficient is high.But this disc-type permanent magnet motor is a brush motor, the speed governing difficulty, and because commutator is arranged, axial dimension can not be enough little, therefore in the application scenario that needs speed governing, can not satisfy instructions for use.

The objective of the invention is to develop that a kind of torque is big, efficient is high and the simple relatively disk-type permanent-magnet electric machine with stepless speed regulation of structure, to satisfy the requirement of speed governing application scenario.

According to the present invention, this purpose is achieved in that and has promptly designed a kind of disk-type permanent-magnet electric machine with stepless speed regulation that it is made up of casing, bearing, stator, rotor, output shaft, it is characterized in that: stator is made up of insulation board and a plurality of coils of being contained in the insulation board, and it is fixed on the casing; Rotor is made up of to outer peripheral irony disk and a plurality of N utmost point and S utmost point permanent magnets alternately of being fixed on the irony disk tape spool, and this rotor on output shaft, has an axial small air gap by Bearing Installation between magnetic patch and the coil; This motor also has a stepless speed regulation part, this stepless speed regulation part is made up of extrorse speed governing iron pan of tape spool and the speed control coil that is fixed in this iron pan, the speed governing iron pan is rigidly fixed on the output shaft, its axial outer edge is positioned at the outer peripheral radial outside of rotor axial, and it has a radially small air gap between the two; Two lead-out terminal the holes through casing in of a plurality of stator coils after connection in series-parallel are connected in the terminal box, two terminals of speed control coil are connected with slip ring by the groove in the output shaft, carbon brush and brush carrier are contained on the end cap, and the connecting line of carbon brush also is connected in the terminal box by the hole in the casing; Output shaft is bearing in casing and the end cap by each bearing respectively.

Because above-mentioned disk-type permanent-magnet electric machine with stepless speed regulation according to the present invention is the brushless magneto, it can be detected and be had the drive circuit driving of certain frequency alternating voltage output by the band back-emf.Owing to have above-mentioned stepless speed regulation part, therefore just can change rotating speed by the electric current that changes speed control coil with the work of electromagnetic clutch mode.Stepless speed regulation desk permanent-magnet motor of the present invention, not only torque is big, the efficient height, and axial dimension is little, can carry out speed governing arbitrarily, is specially adapted to the speed governing application scenario, as the driving of wheel in the electric automobile.

In order to understand the present invention better, below will explain stepless speed regulation desk permanent-magnet motor of the present invention by the embodiment that represents in the accompanying drawing.Accompanying drawing is:

Fig. 1 is the structure chart of disk-type permanent-magnet electric machine with stepless speed regulation according to an embodiment of the invention;

Fig. 2 is the stator installation diagram of motor among Fig. 1;

Fig. 3 is the A-A section among Fig. 2;

Fig. 4 is the rotor installation diagram of motor among Fig. 1.

Fig. 1 is the structure chart of disk-type permanent-magnet electric machine with stepless speed regulation in accordance with a preferred embodiment of the present invention.It radially is circular exterior case 6a and end cap 6b that this motor has.In the interior space of casing 6a and end cap 6b sealing, arranging stator 3 from left to right, rotor 4, stepless speed regulation part 5, slip ring 7a and carbon brush/brush carrier 7b.

The structure of stator 3 wherein at a circular insulating board, for example is processed with 90 ° four the circular coil holes of being separated by successively as shown in Figures 2 and 3 among the masonite 3b.The outer surface of four circular coil 3a is stuck in just in time that blended rubber clings in the coil hole of insulation board.These coil hole and coil differ and are decided to be circle, and its number can not be four also, and for example its shape also can be triangle or ellipse, and number also can be 6 or 8 etc.Here each coil 3a is with three strands of the copper cash of Ψ 0.4-1mm and do one coiling and form, each coil 52 circle, two coils series connection up and down, about two coils series connection, in parallel then.Stator 3 is fixed on the platform 6c of casing 6a by a plurality of screws 8.

The structure of rotor 4 as shown in Figure 4, it is made up of to the irony disk 4b of outward flange 4c and a plurality of N utmost point and the S utmost point permanent-magnet block 4a alternately that are fixed on the irony disk 4b tape spool, permanent-magnet block 4a can be with being adhesive on the irony disk 4b, and also available pressure zone and screw (not shown) fix on this irony disk.This rotor 4 is installed on the output shaft 1 by centre bearing 9b, has an axial small air gap between magnet piece 4a and the coil 3a.

This motor also has a stepless speed regulation part 5, and this stepless speed regulation part 5 is made up of to the speed governing iron pan 5a of outward flange 5c and the speed control coil 5b that is fixed among this iron pan 5a tape spool as shown in fig. 1.Speed governing iron pan 5a is rigidly fixed on the output shaft 1, and its axial outer edge 5c is positioned at the radial outside of rotor axial outward flange 4c, has a radially small air gap between the two.

Two terminals of speed control coil 5a are connected with each slip ring 7a respectively by the groove in the output shaft 1.Carbon brush/brush carrier 7b is contained on the end cap 6b, and the connecting line of carbon brush and the connecting line of stator coil all are connected in the terminal box by the hole among the casing 6a.

Output shaft 1 is bearing among casing 6a and the end cap 6b by bearing 9a and bearing 9c respectively.

Disk-type permanent-magnet electric machine with stepless speed regulation of the present invention is work like this, the drive circuit that is promptly detected by a band back-emf and have the output of certain frequency alternation is powered to stator coil 3a, make thus rotor 4 by the relative output shaft of bearing 9b 1 with certain speed, for example 1500 rev/mins of rotations.Will be among the speed control coil 5b by adjustable direct current, during when no current among the speed control coil 5b or by very little electric current, speed governing iron pan 5a do not have magnetic field suction or suction very little, speed governing iron pan outward flange 5c and rotor outward flange 4c are held each other, therefore be not enough to drive output shaft 1 and load rotation or output shaft and rotate with very little speed.Along with the increase of direct current among the speed control coil 5b, suction will increase, and the rotating speed of output shaft increases, and can make rotating speed infinitely be adjusted to maximal rate (for example 1500 rev/mins) from zero thus.

This disk-type permanent-magnet electric machine with stepless speed regulation in fact axial dimension can be done very for a short time, and they can be contained in the outside of electric automobile core wheel, and its output shaft is connected with core wheel, and casing is connected with vehicle frame by suitable jockey.Certainly, the structure of disk-type permanent-magnet electric machine with stepless speed regulation of the present invention is not limited on the foregoing description, and in the scope of spirit of the present invention, their visual concrete application are implemented with various suitable manner.

Claims

1. disk-type permanent-magnet electric machine with stepless speed regulation, it is by casing, bearing, stator, rotor, output shaft is formed, wherein:

Stator (3) is made up of insulation board (3b) and a plurality of coils (3a) of being contained in the insulation board (3b), and it is fixed on the casing (6a);

Rotor (4) is made up of to the irony disk (4b) of outward flange (4c) and a plurality of N utmost point and the S utmost point permanent-magnet blocks (4a) alternately that are fixed on the irony disk (4b) tape spool, this rotor (4) is installed on the axle (1) by bearing (9b), has an axial small air gap between magnet piece (4a) and the coil (3a);

It is characterized in that:

This motor also has a stepless speed regulation part (5), this stepless speed regulation part (5) is made up of to the speed governing iron pan (5a) of outward flange (5c) and the speed control coil (5b) that is fixed in this iron pan tape spool, speed governing iron pan (5a) is rigidly fixed on the output shaft (1), its axial outer edge (5c) is positioned at the radial outside of rotor axial outward flange (4c), has a radially small air gap in the middle of both;

Two lead-out terminals the hole through casing (6a) in of a plurality of stator coils (3a) after connection in series-parallel is connected in the terminal box (10), two terminals of speed control coil (5b) are connected with two slip rings (7a) by the groove in the output shaft, carbon brush and brush carrier (7b) are contained on the end cap (6b), the connecting line of carbon brush also is connected in the terminal box (10) by the hole in the casing (6b), and output shaft (1) is bearing in casing (6a) and the end cap (6b) by bearing (9a) and bearing (9c) respectively.