CN2156614Y

CN2156614Y - Permanent magnetic dc motor armature coil

Info

Publication number: CN2156614Y
Application number: CN 93238542
Authority: CN
Inventors: 罗发杨
Original assignee: LONGHUA MICROMOTOR FACTORY LONGQUAN TOWN CHENGDU CITY
Current assignee: LONGHUA MICROMOTOR FACTORY LONGQUAN TOWN CHENGDU CITY
Priority date: 1993-04-20
Filing date: 1993-04-20
Publication date: 1994-02-16
Anticipated expiration: 2003-04-20

Abstract

The utility model provides a winding coil used for a permanent magnetism disk type DC motor. Two sections of the active conductors which form straight line shapes are arranged in the hollow closed coil; while the length of the sections are lengthened as far as possible, the included angle between the two straight line sections is equal to or is approach to n/p, wherein, the p is the number of pole pairs of the electric motor. The winding coil of the utility model is favorable to the optimization of the performance of the motor.

Description

Permanent magnetic dc motor armature coil

The utility model relates to a kind of armature winding coil that is used for the permanent-magnet disk direct current machine.

In the permanent-magnet disk direct current machine, the shape of armature winding coil is directly relevant with motor properties.The enclosed shape shape that existing this class winding coil all is a hollow has the polygonal shape that is surrounded by straightway, or the fan-shaped or irregular polygon that surrounds jointly by curve and straight line etc.As having introduced a kind of coil form that has the approximate diamond shape of fillet in the Chinese patent 90220025.9, improve performance by the length of active conductor part in the extension coil.Find in the practice that except that this part active conductor length of lengthening, the angle between its active conductor changes also can influence motor properties.In addition, the another kind of common shape of this class armature winding coil is fan-shaped.The coil of this shape is except that inconvenience on manufacturing process, and the shape of its non-active conductor part still is not best yet.

The purpose of this utility model is to provide a kind of armature winding coil that makes the performance realization optimization of permanent-magnet disk direct current machine.

When improving and optimize motor performance, for the armature winding coil, should be to obtain maximum coil fluxs with the shortest winding conductor, obtain maximum back-emf with the shortest winding conductor in other words conj.or perhaps.Through calculating and test, in the close-shaped armature winding coil of hollow of the present utility model, the length of two active conductor sections of shape of being in line except that should extend as far as possible, therebetween angle is equaled or as far as possible near π/p, p wherein is the number of pole-pairs of motor.Except that this two rectilinear active conductor section, global shape for coil, for well,, also help the most one-step optimization of motor performance simultaneously with the polygon that surrounds by straight line or approximate polygonal shape because of it helps simplifying and making things convenient for manufacturing process on the one hand.

Below coil of the present utility model is described, but scope of the present utility model is not limited only to down example with example shown in the drawings.

Fig. 1 armature winding coil of the present utility model

The sector (-shaped) coil that Fig. 2 and the utility model contrast

Shown in Figure 1 is the inequilateral hexagon winding coil that improves a kind of symmetry that forms on present existing a kind of fan shape coil (as shown in Figure 2) basis.Epimere 2, hypomere 5 and symmetrical upper left section 3, upper right section 1 and lower-left section 4, bottom right section 6 are arranged in the coil.Wherein lower-left section 4 and bottom right section 6 are the active conductor section, angle therebetween be π/p(wherein p be the number of pole-pairs of motor), and this two section also is the longest edge in each limit of hexagon.The coil of this kind planform not only manufacturing process is easy, and compare with the similar sector (-shaped) coil of shape shown in Figure 2, big in fan-shaped, roundlet arc limit belongs to invalid conductor section, roundlet arc limit is converted into linear hypomere 5 among Fig. 1, after the orthodrome limit is converted into linear epimere 2 among Fig. 1 and upper left section 3 and upper right section 1, not only epimere 2 and hypomere 5 are shorter than corresponding circular arc, also since upper left section 3 and upper right section 1 be significantly less than the section of (h+g) in the orthodrome among Fig. 2 and (m+n) length of section respectively, so the invalid conductor section total length in Fig. 1 coil is less than the sector (-shaped) coil of Fig. 2.This will obviously help the improvement and the optimization of motor performance.Adopt the motor of Fig. 1 coil to see the following form with existing similar motor properties comparative result.

	No-load current A	No-load speed rev/min	Load current A	Bear and walk around fast rev/min	Input power W	Power output W	Efficient %
								Existing motor	0.45	4071	6.3	2176	75.6	39.0	51.6
The utility model motor	0.85	3472	7.9	2634	94.8	69.9	73.7

Claims

1, the close-shaped armature winding coil of a kind of hollow of permanent-magnet disk direct current machine is characterized in that having in the coil two rectilinear active conductor sections (4) and (6), and angle therebetween equals or near π/p, wherein p is the number of pole-pairs of motor.

2, coil as claimed in claim 1 is characterized in that said coil shape is the polygonal shape on linear limit, and active conductor section (4) and (6) are two longest edges in this polygon.

3, coil as claimed in claim 2 is characterized in that the inequilateral hexagonal shape of said coil shape for symmetry.