UA73083C2 - Direct-current electric machine - Google Patents

Abstract

The proposed direct-current electric machine contains two commutators, witch are installed at the machine shaft on both sides. The bars of the armature winding of the machine are connected to the segments of the said commutators. The number of the commutator brushes is half the number of the armature winding bars. The brushes that are installed at different commutators are connected to each other via the bars of the compensation winding of the machine. The proposed design of the electric machine provides a possibility to exclude short-circuited circuits in the armature winding and reduce consumption of steel and copper in manufacturing the machine due to the absence of copper end connectionsof the compensation winding and a possibility to exclude commutating poles.

Description

Description of the invention

The invention is related to electrical engineering and can be used to drive the rolls of rolling mills, 2 propellers of ships, etc.

A known unipolar electric machine with both a disc and a cylindrical armature | see Australian patent MO 450016, class 110c, 1971.). The armature winding of the machine is made of a series of conductive plates, which ends at two ends with current-collecting segments, along which two rows of brushes slide. The number of brushes in each row is two times less than the number of anchor plates. The direction of the excitation magnetic flux is perpendicular to the plane 70 of the plates and the velocity vector. The brush connection scheme allows you to obtain the voltage of the electric machine in proportion to M/2, where M is the number of plastic anchors.

Most close. to the technical essence of the invention is a direct current collector machine, see Yu. A. Kulyk,

Electrical machines. Higher School, 1971, p. 9-15 |. The magnetic system of an electric machine is alternating, evenly spaced electromagnetic poles. The armature winding is made of a closed, double-layer of 79 serially connected coils in a parallel branch, at the same time, each coil is connected to the collector plates of the collector. Brushes are installed on the collector along the geometric neutral line of the poles of the magnetic system.

The disadvantages of such a machine include power limitation and reduced operational reliability associated with the commutation process of the armature winding coils short-circuited by brushes. In the case of significant overloads, the appearance of circular fire on the collector is possible even with the presence of additional poles and compensation winding, due to commutation reasons, the coils of the armature winding are made single-turn, and there are also limitations on the amount of current in the parallel branch of the armature winding and on the voltage between the collector plates of the collector.

The task of this invention is to improve commutation, increase power and operational reliability, reduce the consumption of active materials c 29 This task is solved by the fact that the core windings of the armature are connected to the collector plates of two collectors, Go) located at opposite ends of the armature shaft. Brushes are installed on the collectors, which are two times smaller than the armature rods, and the brushes, placed on different collectors, are connected using the rods of the compensating winding.

With such a connection, the consumption of copper for the production of the compensating winding is significantly reduced, since there are no frontal parts, which are made of a copper busbar. with

Two brushes on the corresponding collectors belonging to different poles of the magnetic system are interconnected, which helps to increase the voltage, since the number of parallel branches of the armature winding 2a, regardless of the number of poles gr, o, is equal to one. co

To increase the current of the machine, it is necessary to connect the core windings of the armature as shown in Fig. dashed (without 3o pos. 6), while 2a is equal to 2p. in

Due to the absence of coils short-circuited by brushes in the armature winding, commutation is improved, power is increased, and operational reliability is reduced, the consumption of sheet steel and copper is reduced, because there is no need to install additional poles. "

The essence of the invention is explained by the drawing, where in Fig. depending on the connection between the connections of the rods C 50 of the armature and the compensation winding under adjacent pairs of poles, as well as between adjacent poles, the number of parallel branches of the armature winding is equal to 2a-2p, 2a-1 and 2a-2p.

From" The proposed electric machine has two collectors 1, an armature with rods 2, as well as the rods of the compensating winding 3, which are located in the pole tips of the poles 4. Brushes 5 are installed on the collectors. Two brushes on the collectors are connected by a jumper 6.

When voltage is applied to the armature winding and to the excitation pole winding, the interaction of the current of the armature rods with the 7 magnetic flux of the poles creates an electromagnetic moment that causes the armature to rotate. Since in the rods of the armature and compensating winding, connected in series, the current is the same in magnitude, but opposite in direction, the magnetomotive force of the compensating winding compensates the magnetomotive force of the armature winding along the transverse axis. At the same time, the magnetic induction in the air gap between the armature and the poles is distributed by 20 evenly, and therefore the voltage between the collector plates of the collector does not exceed the allowable one.

It is known from the technical field that the rolling motor has a core compensating winding in the grooves of the pole tips, as well as an armature core winding.

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Claims (5)

The formula of the invention with 35 but with, , and - 1. A direct current electric machine having alternating poles M and 5, in the pole tips of which the rods of the compensating winding are placed, and an armature with a winding connected to the collector, which differs in that the rod windings of the armature are connected to two collectors located at opposite ends armature shaft, and brushes are installed on them, which are two times smaller than the armature rods, and with the help of which, as well as jumpers, the armature rods and compensation winding are connected. with p - 1, which differs in that the rods of the armature and compensating winding are connected in series under adjacent pairs of poles p, where p is the number of pairs of poles. and . x . Nya and a 3. An electric machine according to claim 2, which differs in that the connections of the armature rods and the compensating winding are connected in parallel, while 2a is p, where 2a is the number of parallel branches of the armature winding. 4. Electric machine according to claim 2, which differs in that the connections of the armature rods and compensation winding -I are connected in series, while 2a - 1. 5. An electric machine according to claim 1, which differs in that the rods of the armature and compensating winding are connected in series under poles 2p, where 2p is the number of poles. o 6. Electric machine according to claim 5, which differs in that the connections of the armature rods and the compensating winding are connected in parallel, while 2a - 2p. (ee) p» Official Bulletin "Industrial Property". Book 1 "Inventions, useful models, topographies of integrated microcircuits", 2005, M 6, 15.06.2005. State Department of Intellectual Property of the Ministry of Education and Science of Ukraine. name) 60 b5