CN2772110Y

CN2772110Y - Dual-way controllable single-phase alternating-current permanent-magnet synchronous motor

Info

Publication number: CN2772110Y
Application number: CN 200420103147
Authority: CN
Inventors: 孔艳丽
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-12-29
Filing date: 2004-12-29
Publication date: 2006-04-12
Anticipated expiration: 2014-12-29

Abstract

The utility model relates to a dual-way controllable single-phase AC permanent-magnet synchronous motor which comprises a permanent-magnet rotor, coils and a stator iron core. The utility model is characterized in that the motor adopts a radial magnetic flux structure, the number of poles of the motor is the multiple of six, the number of grooves of a stator is the multiple of four, the coil is an integer distance concentrated winding and the coils of the adjacent odd grooves are separated by an electrical angle of 180 DEG and are connected in series in a reverse mode to form a phase winding. The coils of the adjacent even grooves are also separated by an electrical angle of 180 DEG and are connected in series in a reverse mode to form the other phase winding. The two phase windings are separated by an electric angle of 90 DEG in space. The magnetic conductive area of a stator tooth is much larger than that of a claw pole motor, and in the same way, the magnetic conductive area of a stator yoke of the utility model is that the height of the stator yoke is multiplied by the stacking thickness of the motor and the magnetic conductive area of a stator yoke of the claw pole motor is that the wall thickness is multiplied by the yoke height. The utility model has the advantages of little magnetic pressure drop of the stator, high motor efficiency and good starting performance, moreover, the efficiency of the motor is high and the power of the motor is high.

Description

Two-way controlled single-phase AC permanent-magnet synchronous motor

Technical field

The utility model relates to a kind of two-way controlled single-phase AC permanent-magnet synchronous motor, especially a kind of can the controlled single-phase AC permanent-magnet synchronous machine of self-running direction of rotation.

Background technology

Existing two-way controlled single-phase AC permanent-magnet synchronous machine is to be composed in series by two coaxial pawl utmost point motors, and their stator spatially differs 90 degree electrical degrees, by electric capacity phase shift input two-phase alternating current, produces rotating magnetic field and drags the p-m rotor rotation.This electric machine structure is simple, cost is low, but starting performance is bad, motor pole number must be more than or equal to 8, otherwise starting difficulty, because the magnetic conduction cross section of motor is little, magnetic circuit is long simultaneously, the stator core magnetic pressure falls greatly, easily saturated, air gap flux density is low, and power of motor density is little, and efficient is low, power output is generally less than 10 watts.

Summary of the invention

The purpose of this utility model is: a kind of two-way controlled single-phase AC permanent-magnet synchronous motor is provided, and not only the stator magnet pressure drop is little for it, and starting performance is good, and electric efficiency height, power are big.

The utility model is such realization: a kind of two-way controlled single-phase AC permanent-magnet synchronous motor comprises p-m rotor, coil, stator core, number of stator slots is 2: 3 with the ratio of motor pole number, the stator tooth that coiling is arranged on the stator core, p-m rotor is by permanent magnet, rotor core constitutes, its special character is: motor adopts the radial flux structure, motor pole number is 6 multiple, number of stator slots is 4 multiple, coil is concentrated winding for whole distance, adjacent odd bin coil 180 electrical degrees of being separated by, differential concatenation becomes a phase winding, adjacent even bin coil also be separated by 180 the degree electrical degrees, differential concatenation becomes another phase winding, two phase windings, 90 electrical degrees of spatially being separated by.

Its special character is: the facewidth of the stator tooth on the stator core, yoke height approximate the pole span of motor, and stator tooth is the salient pole parallel teeth.

The two-way controlled single-phase AC permanent-magnet synchronous motor of the utility model, motor pole number is 6 multiple, minimum is 6, and the minimum number of poles of claw-pole motor is 8, under similarity condition, because 6 utmost point motor speed height, its power output is also big; The width of stator parallel teeth near or equal a pole span, the width of stator tooth generally is not less than 3mm, equal 1/6 of the interior girth of stator, and the claw-pole motor stator facewidth generally is not less than 2mm, equal 1/8 of the interior girth of stator, again because the utility model adopts is the radial flux structure, its stator tooth magnetic conductive area is: the facewidth * folded thick, and the magnetic conductive area of claw-pole motor stator tooth is: the wall thickness of the facewidth * tooth, general motor folded thick has 5mm at least, and the wall thickness of claw-pole motor stator tooth is about 1.5mm, the magnetic conductive area of the utility model motor stator tooth is out and away greater than claw-pole motor, the magnetic conductive area of same the utility model stator yoke is: stator yoke height * motor folded thick, and the magnetic conductive area of claw-pole motor stator yoke is: wall thickness * yoke height, and the pressure drop of the utility model stator magnet is little, the electric efficiency height, starting performance, and electric efficiency height, power is big.

Description of drawings

Fig. 1 is the utility model front view.

Fig. 2 is the front view of stator core of the present utility model.

Fig. 3 is the stator coil winding diagram

Embodiment

Below in conjunction with accompanying drawing the utility model is further described.

As shown in Figure 1, the number of poles of motor is 6, be uniform-distribution with four stator tooths 61 on the inner surface of

stator core

1,62,63,64, four

stator coils

21,22,23,24 symmetrically around four

stator tooths

61,62,63, on 64, the odd number coil 21 of opposite face (neighbour), 23 or adjacent even

number coil

22,24 360 * 3/4 * 2-360=180 electrical degrees of being separated by, they respectively differential concatenation become a phase winding,

adjacent stator coil

21,22,23,24 360-360 * 3/4=90 the electrical degrees of being separated by, just form the two-phase winding jointly, this two phase winding spatially be separated by 90 the degree electrical degrees, its wiring schematic diagram as shown in Figure 3, the two-phase stator winding feeds after the alternating current, auxiliary winding is because the phase shift effect of electric capacity makes the leading main winding current of auxiliary winding electric current be approximately 90 degree, and the two magnetic field that forms a rotation in air gap drags p-m rotor 3 rotations.Because the rotating magnetic field direction that

stator coil

21,22,23,24 produces is controlled, so the direction of rotation of motor also is controlled.P-m rotor 3 outsides are permanent magnets 5, and the inside is a rotor core 4; Because this motor is 6 utmost point motors, owing to the raising of rotating speed, its power output will be bigger by 30% than 8 utmost point motors under same condition.

As shown in Figure 2, four stator tooths 61 of

stator core

1,62,63,64 the facewidth, the yoke height is respectively 4mm, 4mm, and the facewidth of claw-pole motor and yoke height are respectively 3mm, 1.5mm, this shows all obvious facewidth and yoke height greater than claw-pole motor, four

stator tooths

61,62,63,64 is parallel, and width is near a tooth pitch, the tooth portion of stator magnetic circuit and yoke portion magnetic conductive area are respectively the thick and yoke height of the facewidth * folded * folded thick, and claw-pole motor magnetic circuit tooth portion and yoke portion magnetic conductive area are respectively the facewidth * wall thickness and yoke height * wall thickness, because the folded thick wall thickness that is far longer than claw-pole motor of motor, so the tooth pressure of motor fall with the yoke pressure drop will be more much smaller than claw-pole motor, same p-m rotor 3 air gap flux densities will be higher than claw-pole motor, and the power density of motor is improved;

Stator tooth

61,62,63,64 parallel structures make things convenient for the embedding of

stator coil

21,22,23,24, the chording factor of

stator coil

21,22,23,24 is close to 1 simultaneously, and breadth coefficient also is 1, and

stator coil

21,22,23,24 winding coefficients are about 1, the utilance height.The facewidth of

stator tooth

61,62,63,64 has only 1/6 of stator inner periphery length, so

stator coil

21,22,23,24 every circle length are also than the weak point of claw-pole motor,

stator coil

21,22,23,24 resistance also can be more much smaller than claw-pole motor, and the copper loss of motor is also little.

Claims

1, a kind of two-way controlled single-phase AC permanent-magnet synchronous motor comprises p-m rotor, coil, stator core, number of stator slots is 2: 3 with the ratio of motor pole number, the stator tooth that coiling is arranged on the stator core, p-m rotor is by permanent magnet, rotor core constitutes, it is characterized in that: motor pole number is 6 multiple, number of stator slots is 4 multiple, coil is concentrated winding for whole distance, adjacent odd bin coil 180 electrical degrees of being separated by, differential concatenation becomes a phase winding, the adjacent even bin coil 180 degree electrical degrees of also being separated by, differential concatenation becomes another phase winding, two phase windings, 90 electrical degrees of spatially being separated by.

2, two-way controlled single-phase AC permanent-magnet synchronous motor according to claim 1, it is characterized in that: the facewidth of the stator tooth on the stator core, yoke height approximate the pole span of motor, and stator tooth is the salient pole parallel teeth.