CN105070455B - Non-moment solenoidal magnetic field coil with radial openings - Google Patents

Abstract

The invention discloses a non-moment solenoidal magnetic field coil with radial openings. The magnetic field coil is formed by combining an inner solenoid with an outer solenoid; two pairs of windings are distributed on each solenoid in a bilateral symmetry manner by taking a central section as an axis; each pair of windings include two winding sections; a gap is formed between the two winding sections of one pair of windings on the same side of the axis; the gap between the two winding sections on two sides of the axis is provided with the radial openings; central magnetic axes of the inner and outer solenoids coincide; the inner and outer solenoids are reversely connected in series; and certain relations of the winding intervals and the radiuses of the two solenoids, certain relations of the numbers of turns and the intervals of coil windings, and certain relations of the numbers of turns of coil windings and the radiuses of the solenoids are satisfied, so that radial test demands of the non-moment coil are met.

Description

A kind of radial opening without square solenoid magnet field coil

Technical field

The present invention relates to field coil technology, more particularly to a kind of radial opening without square solenoid magnet field coil skill Art.

Background technology

In fields such as magnetic measurement, atom opticses, in order to axially, radially carry out test job, it is often necessary to use footpath To opening without square field coil.And two solenoid magnets without square field coil typically from coaxial but radius not etc. of routine The compound mode of field coil.It is this it is conventional there is simple structure without square field coil, but only axially there is opening Space, it is impossible to meet the testing requirement of radial direction.Such as using Helmholtz without square coil, although can meet axially, radially simultaneously The demand of opening, but at least need 4 rings constitute without square field coil, constructive difficulty is increased, it is particularly little in needs Occasion of the size without square coil.

The content of the invention

In view of this, the invention provides a kind of radial opening without square solenoid magnet field coil, its simple structure, while Axially, radially there is open space, and meet the radial direction testing requirement without square coil.

In order to achieve the above object, the technical scheme is that：The field coil combined by inside and outside two solenoids and Into, two pairs of windings are distributed with along centre section for axis is symmetrical on each solenoid, each pair winding includes two sections of windings, place Space is left between a pair of windings of axis the same side, two sections of windings；Open in space wherein between two sections of windings of axis both sides If radial opening.

Inside and outside two solenoidal central magnetic axis overlap, inside and outside two solenoid differential concatenations；

In the same side of axis, with R₁、R₂For the effective radius after inside and outside two solenoid wire wound；L_1,1、L_1,2、L_1,3、L_1,4Point Not Wei a pair of winding edges of the interior solenoid in the side and axis distance, L_1,1With L_1,2Between be near one section of axis around Group, the number of turn are w_1,1, L_1,3With L_1,4Between be another section of winding, the number of turn is w_1,2；L_2,1、L_2,2、L_2,3、L_2,4Respectively outer solenoid In a pair of winding edges and the distance of axis of the side, L_2,1With L_2,2Between be one section of winding near axis, the number of turn is w_2,1, L_2,3With L_2,4Between be another section of winding, the number of turn is w_2,2。

Following relation is met between two solenoidal winding spacing and radius.

Following relation is met between the coil windings number of turn and spacing：

Following relation is met between the coil windings number of turn and solenoid radius：

Further, following relation is met between single solenoidal winding spacing and radius.

WhenWhen,

WhenWhen,

Beneficial effect：

1st, the invention discloses a kind of radial opening without square solenoid magnet field coil, the skeleton of the field coil using by The solenoid that two coaxial but radius is not waited is combined, with simple structure and there is open space axial direction, radial direction, and meets Radial direction testing requirement without square coil.

2nd, by the relation in design spiral pipe between each winding and solenoid radius in the present invention, ensure that coil is produced Raw magnetic field's regularity, and homogeneity range almost spherical, the diameter of Spherical Volume magnetic field non-uniformity of radial opening are better than 0.01%.

Description of the drawings

Schematic diagrams without square solenoid magnet field coil of the Fig. 1 for radial opening.

Specific embodiment

Develop simultaneously embodiment below in conjunction with the accompanying drawings, describes the present invention.

The skeleton of embodiment 1, field coil is using by two coaxial but radius solenoid not etc. is combined, each spiral shell Two pairs of windings are distributed with along centre section for axis is symmetrical on spool, each pair winding includes two sections of windings, same in axis A pair of windings of side, leave space between two sections of windings；Space wherein between two sections of windings of axis both sides is for radially opening Mouthful.

Inside and outside two solenoidal central magnetic axis overlap, inside and outside two solenoid differential concatenations.

Two solenoidal sizes, winding as shown in figure 1, in the same side of axis, with R₁、R₂For inside and outside two solenoid around Effective radius after line；L_1,1、L_1,2、L_1,3、L_1,4A pair of winding edges and the distance of axis of the respectively interior solenoid in the side, L_1,1With L_1,2Between be one section of winding near axis, the number of turn is w_1,1, L_1,3With L_1,4Between be another section of winding, the number of turn is w_1,2；L_2,1、L_2,2、L_2,3、L_2,4A pair of winding edges and the distance of axis of the respectively outer solenoid in the side, L_2,1With L_2,2It Between be one section of winding near axis, the number of turn is w_2,1, L_2,3With L_2,4Between be another section of winding, the number of turn is w_2,2。

Ensure coil without the characteristic that square, i.e. magnetic moment are 0, relationship below need to be met：

1、L_1,1、L_1,2、L_1,3、L_1,4、L_2,1、L_2,2、L_2,3、L_2,4With R₁、R₂Between have following relation.

2、w_1,1、w_1,2With L_1,1、L_1,2、L_1,3、L_1,4And w_2,1、w_2,2With L_2,1、L_2,2、L_2,3、L_2,4Between have following relation.

3、w_1,1、w_1,2、w_2,1、w_2,2With R₁、R₂Between have following relation.

After coil winding on single solenoid is good, by inside and outside two solenoid differential concatenations.

In order to ensure that coil produces magnetic field's regularity, L_1,1、L_1,2、L_1,3、L_1,4With R₁Between have following relation.

WhenWhen,

WhenWhen,

This solenoidal coil constant k_BCan be demarcated by standard gaussmeter, the standard Magnetic Field of coil reproduction is Product B=k of the coil constant with coil by electric current_B×I。

To sum up, presently preferred embodiments of the present invention is these are only, is not intended to limit protection scope of the present invention.It is all Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements made etc. should be included in the protection of the present invention Within the scope of.

Claims (2)

1. a kind of radial opening without square solenoid magnet field coil, it is characterised in that the field coil is by inside and outside two helicals Pipe is combined, and two pairs of windings is distributed with along centre section for axis is symmetrical on each solenoid, and each pair winding includes two Section winding, leaves space between a pair of windings of axis the same side, two sections of windings；Wherein between two sections of windings of axis both sides Space open up radial opening；

Inside and outside two solenoidal central magnetic axis overlap, inside and outside two solenoid differential concatenations；

In the same side of axis, with R₁、R₂For the effective radius after inside and outside two solenoid wire wound；L_1,1、L_1,2、L_1,3、L_1,4Respectively A pair of winding edges and the distance of axis of the interior solenoid in the side, L_1,1With L_1,2Between be one section of winding near axis, circle Number is w_1,1, L_1,3With L_1,4Between be another section of winding, the number of turn is w_1,2；L_2,1、L_2,2、L_2,3、L_2,4Respectively outer solenoid is at this A pair of winding edges of side and the distance of axis, L_2,1With L_2,2Between be one section of winding near axis, the number of turn is w_2,1, L_2,3With L_2,4Between be another section of winding, the number of turn is w_2,2；

Following relation is met between two solenoidal winding spacing and radius：

$\frac{L_{1,1}}{R_1}=\frac{L_{2,1}}{R_2};\frac{L_{1,2}}{R_1}=\frac{L_{2,2}}{R_2};\frac{L_{1,3}}{R_1}=\frac{L_{2,3}}{R_2};\frac{L_{1,4}}{R_1}=\frac{L_{2,4}}{R_2};$

Following relation is met between the coil windings number of turn and spacing：

$\frac{w_{1,1}}{w_{1,2}}=\frac{L_{1,2}-L_{1,1}}{L_{1,4}-L_{1,3}};\frac{w_{2,1}}{w_{2,2}}=\frac{L_{2,2}-L_{2,1}}{L_{2,4}-L_{2,3}};$

Following relation is met between the coil windings number of turn and solenoid radius：

$(w_{1,1}+w_{1,2})R_1^2=(w_{2,1}+w_{2,2})R_2^2.$

2. a kind of radial opening according to claim 1 without square solenoid magnet field coil, it is characterised in that：Single helical Following relation is met between the winding spacing of pipe and radius：

WhenWhen,

WhenWhen,