CN2882084Y

CN2882084Y - Single-phase AC electric machine, motor stator vane

Info

Publication number: CN2882084Y
Application number: CN 200620110149
Authority: CN
Inventors: 舒晓凤; 郑世华; 陈国徽; 杨东
Original assignee: Chongqing Apollo Gangcheng Science And Technology Co Ltd
Current assignee: Chongqing Apollo Gangcheng Science And Technology Co Ltd
Priority date: 2006-03-17
Filing date: 2006-03-17
Publication date: 2007-03-21
Anticipated expiration: 2016-03-17

Abstract

The utility model relates to a stator plate for a single-phase AC generator and motor. Wherein, while remaining the inner and outer profile of the prior stator plate, the diameter of the arc section at middle of the stator plate having no slot is increased. The purpose for that is to increase air gap at the quadrature-axis position of the motor (that is, to use a second air gap), so as to increase the magnetic resistance of the reaction magnetic circuit of the motor's quadrature axis, as a result the magnetic flux density at the quadrature-axis position (arc section) is basically even with other points when the motor is working, which can obviously improve the inductive-load-bearing capacity of the motor with other given parameters. The utility model overcomes the shortcoming of poor load-bearing capacity associated with stator plates in prior single-phase AC motors and generators.

Description

Single-phase alternator, motor stator sheet

Technical field

The utility model relates to a kind of electric machine part, particularly single-phase generator, motor stator sheet.

Background technology

In order to improve the utilance of stator material, the stator piece profile of the one-way communication generator of Sheng Chaning all is not complete circle in the market, and two kinds of shapes are arranged now, older a kind of structure waste raw material, a kind of structure such as Fig. 1 of nearer appearance.

Figure 1 shows that the planform figure of a single phase synchronous generator stator piece of nearer appearance, the outline of stator piece is that the concentric circles segmental arc by four straightways and adjacent transition is connected to form, article four, straightway is parallel in twos is divided into two groups, two groups vertical mutually again, wherein one group of Line Segment is longer, and the length of another group Line Segment is shorter relatively.Distance L 1 among the figure between the parallel one group of straightway in the left and right sides is greater than the distance L 2 between one group of parallel up and down straightway.The center hole of stator piece circumferentially has groove, is respectively the groove a that the groove b that occupies of main winding and excitation winding are occupied.Wherein the groove position occupied of excitation winding the longer straightway e of stator piece relative center hole along circumferential position, and be the two ends that bound pair claims to be distributed in this part arc of described circumference c with the center line of this longer straightway e, the arc c unslotted that the centre is reserved.The area of the groove that excitation winding is used is less than the area of the shared groove of main winding, and the shape difference.Two of the structure existence of this stator punching are unreasonable: the arc section c center that (1) does not establish groove is the friendship shaft position of machine operation, when using the machine operation of stator piece structure shown in Figure 1, near the arc section c place air gap flux density is uneven than the air gap flux density of the whole circumference of the position magnetic flux of fluting closely knit border work, [general load is an inductive load] electric current lagging voltage when single-phase generator band inductive load, it is rotor armature supply maximum when being positioned at motor and handing near axle, this moment, armature winding produced bigger armature reaction [being demagnetizing effect], and the consequence that it brings is that motor is relatively poor to the load capacity of inductive load.Therefore, the load capacity of the motor of the stator piece of employing Fig. 1 structure is poor.

(2) stator core of generator by the stator piece of some quantity laminate weld together into as a whole, because the intensity of the position c of the center inner periphery unslotted of Fig. 1 stator piece is much larger than the position of all the other flutings of center circumferential, and excitation winding is different with the shape size of groove with groove and main winding, produce proof in enormous quantities: after stator piece laminates the welding cooling, the welding deformation amount at each position is inconsistent, the center hole of stator core no longer is circular, the diameter N2 of the approximate circle segmental arc that the centre is reserved＜the establish approximate circle segmental arc diameter N1 of groove.And N2 is less than the nominal size of specification requirement, and N1 is greater than nominal size.And the theoretical work air gap of the rotor of generator is to set by the nominal size of specification requirement, stator core centre bore distortion after welding, the real work air gap inequality that causes rotor, thus the magnetic flux density of the working gas gap of motor is inhomogeneous, and its load capacity also reduces.

Summary of the invention

The purpose of this utility model is to provide a kind of single-phase alternator, motor stator sheet, to overcome the deficiency of existing in prior technology load capacity difference.

The purpose of this utility model can reach by following technical measures, design a kind of single-phase motor stator piece, its outline is that the concentric circles segmental arc by four straightways and adjacent transition is connected to form, article four, straightway is parallel in twos is divided into two groups, two groups vertical mutually again, wherein one group of Line Segment is longer, and the length of another group Line Segment is shorter relatively; Center hole of profile circumferentially has two groups of grooves in it, these two groups of grooves connect through arc, and described arc is exactly an arc section of not establishing groove, and this arc is over against the longer straightway of outline, its main points are: the diameter of described arc is greater than the arc section diameter of establishing groove, and with one heart.Its purpose is to hand over shaft position to increase air gap [promptly adopting interstice] at motor, thereby increase the magnetic resistance that motor is handed over axle reaction magnetic circuit, even substantially when making machine operation at magnetic flux density and other position of handing over shaft position [arc section position], under the identical situation of other parameter, can obviously improve the load capacity of motor to inductive load.

The beneficial effects of the utility model are: simple in structure, can increase the magnetic resistance that motor is handed over axle reaction magnetic circuit, and load capacity is strong.

Description of drawings

Fig. 1 is for now using the structure chart of load motor, generator unit stator sheet;

Fig. 2 is the structure chart of the utility model one-way communication motor, generator unit stator sheet.

Embodiment

Below with reference to accompanying drawing concrete structure of the present utility model is further described.

Referring to Fig. 2, a kind of single-phase alternator described in the utility model, the motor stator sheet, it is the improvement on Fig. 1 basis, the outline of stator piece is that the concentric circles segmental arc by four straightways and the transition of adjacent straight line segment is connected to form, article four, straightway is parallel in twos is divided into two groups, two groups vertical mutually again, wherein one group of Line Segment is longer, the length of the straightway that another group is parallel is shorter relatively, the center hole of stator piece circumferentially has two groups of grooves 2,4, these two groups of grooves 2,4 through arc 1 connection, described arc 1 is over against the longer straightway 3 of outline, this arc 1 is exactly an arc section of not establishing groove, and its main points are: the diameter of phi A of described arc 1 is greater than the arc section diameter of phi B that establishes groove, and with one heart.Wherein: the groove position that excitation winding is occupied the longer straightway 3 of stator piece relative center hole along circumferential position, and be that bound pair claims to be distributed on the described circumference with the center line of this longer straightway 3, just be positioned at two of arc 1.The diameter of phi A of arc 1 decides according to the motor of concrete model with the diameter of phi B difference of the arc section of establishing groove.

Show through theory derivation and experiment, adopt of motor under other parameter identical situation the obviously enhancing of the load capacity of motor of the present utility model than stator piece structure shown in Figure 1.

Claims

1, a kind of single-phase alternator, motor stator sheet, its outline is that the concentric circles segmental arc by four straightways and adjacent transition is connected to form, article four, straightway is parallel in twos is divided into two groups, two groups vertical mutually again, wherein one group of Line Segment is longer, and the length of another group Line Segment is shorter relatively; Center hole of profile circumferentially has two groups of grooves (2,4) in it, these two groups of grooves connect through arc (1), described arc (1) is over against the longer straightway (3) of outline, it is characterized in that: the diameter of described arc (1) (Φ A) is greater than the arc section diameter of establishing groove (Φ B), and with one heart.