RU33273U1 - Non-contact electric machine - Google Patents

Description

where p is the number of pole pairs.

Known non-contact electric machine magnetoelectric type 2, containing a stator with Z evenly spaced teeth on which the phase winding is placed, and a rotor with 2/7 alternating poles. The number of stator teeth Z, a multiple of the number of phases m and the number of poles of the rotor 2p, are chosen so that the difference between them is ± /, where / is the minimum integer, and the w-phase winding is a winding, each phase of which consists of / -coil groups wound so so that the winding directions on the stator teeth alternate within each coil group and so that on the teeth of one phase shifted by 180 ° //, the direction is consistent with odd / and opposite with even /, and the shift between phases otm

defined as a - for from 2 /

 at / (2 / + 1) 2 2, t

, 2 ...

When designing these electrical machines, the fully active volume of the machine is not used, for a given mechanical characteristic.

The closest in technical essence to the claimed utility model selected for the prototype is a non-contact electric machine 3, containing a stator with Z evenly spaced teeth, on which the / -phase winding and a rotor with 2/7 alternating poles are placed, and the number of stator teeth Z, a multiple of the number of phases m, and the number of poles of the rotor 2p are chosen so that the difference

between them was ± /, where / is the minimum integer. The ratio between the active length of the rotor L, its diameter D and the number of evenly spaced stator teeth Z is defined as

  3

ID) 7

. J opt

Z-number of stator teeth,

where / is the minimum integer

p is the number of pole pairs.

The disadvantage of the prototype is that when determining the optimal ratio of the length and diameter of the rotor, the criterion of maximum rigidity of the mechanical characteristic is used. Comparison of the design options of contactless electric machines is POSSIBLE only under the condition of the same active volume of the machine, which makes it difficult

comparison of different designs of machines with different types of magnetic systems.

The objective of the utility model is to create a new non-contact electric machine, the use of a coghor allows to obtain a technical result, consisting in increasing its efficiency, due to improved use of active materials. This utility model is aimed at expanding the arsenal of hardware.

The task is achieved in that a non-contact electric machine containing a stator with a w-phase winding and a rotor with 2p alternating poles, characterized in that the t-phase winding of the stator is made in the form of uniformly spaced coils, the number Z of which is a multiple of the number of phases t, and the ratio between the active length of the rotor L, its active diameter Da is defined as:

   2a, 2.

at

.5p

where Z is the number of stator coils,

p is the number of pairs of rotor poles.

The stator is made with evenly spaced teeth, and the number of stator teeth is equal to the number of its claws.

The claimed combination of essential features of a utility model implements its purpose with a technical result consisting in improving the efficiency of a contactless electric machine by improving the use of active materials.

A non-contact electric machine may not have a gear version, therefore, in the general case, a version with a coil version is considered. With option

,

3, the stator is aligned with evenly spaced teeth, the number of stator teeth but the number of its coils. The essence of the utility model is illustrated by a sketch, which shows the main structural elements of a contactless electric machine: 1-stator; 2-stator teeth; 3-stator winding; 4-rotor magnets; La is the active length of the rotor; Da- active rotor diameter. To select the optimal geometric relationships for a given design type of machine and to compare their various modifications, it is proposed to determine the given criterion for optimizing the specific stiffness of the mechanical characteristics of the sterility from the relations: (4 where -coefficient of filling the groove with conductors; La-active length of the rotor; Lcp-average length of the stator turn; 1.2 (4 + “.- /).) 6 where Da- is the active diameter of the rotor; n a, -; where a. angular size of the coil;

n D

y. m

Cd is the active volume of the machine;

We transform mathematical expressions for the two simplest cases:

a) Gd const; hn const;

(And opt

b) F const; lb const;

Oh - mi D I 2Z 2

a jopt

Interim optimization case:

Thus, these ratios (8-10) make it possible to establish for most practically important cases of the use of contactless magnetoelectric machines

the most rational ratios - that allows you to increase

Efficiency of using non-contact electric machines by improving the use of active materials.

Sources of information taken into account when compiling a description of a utility model:

1.PateetRF Ho1830174, Н02К 1 / 27.29 op. 07/23/93.

2. RF patent No. 2143777, Н02К 1/06, op. 06/10/98.

V a Joft

Claims (2)

1. A non-contact electric machine containing a stator with an m-phase winding and a rotor with 2p alternating poles, characterized in that the m-phase stator winding is made in the form of uniformly arranged coils, the number Z of which is a multiple of the number of phases m, and the ratio between the active rotor length L _a , its active diameter D _a is defined as

at

Z = 1.5p; where Z is the number of stator coils; p is the number of pairs of rotor poles. 2. The contactless electric machine according to claim 1, characterized in that the stator is made with evenly spaced teeth, the number of teeth of the stator being equal to the number of its coils.