RU2749048C1 - Direct current generator - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, direct current generators, and can be used as a direct current source for any technical means. The generator consists of two armatures mounted on one shaft with a longitudinal offset relative to each other, made of sheet electrical steel and having two sidewalls with segments around the circumference, which form poles and inserts fixed between them. Cores are fixed on the stator by metal non-magnetic inserts, consisting of packets of rings made of sheet electrical steel with windings located on them. In front of the armature, there is a grating with isolated graphite brushes attached to it, adjoined to slip rings, isolated on the armature. The shaft with its ends rests on rolling bearings, which are located in the bearing units of the stator end caps. In the middle part of the stator there is a hole for installing a blower fan, and there are holes for air discharge on the edges. A battery is required to excite the armatures at the time of start.

EFFECT: provided is regulation of direct current when the load changes.

1 cl, 2 dwg

Description

The technical field to which the invention relates

The invention relates to electrical engineering, and can be used to provide direct current to any technical device.

State of the art

Known DC generator RU 2497265 C2, publ. 09/27/2012, on the anchor of which permanent magnets are installed to excite the stator windings. This invention has its drawbacks, which are that permanent magnets quickly lose their magnetic properties during operation and after 2-3 years they have to be changed, and also when the armature rotates, a sinusoidal current is obtained, which must be rectified, but at the same time the output is obtained not an ideal direct current, but with a small ripple, which is not always suitable for certain technical devices.

Also known inductor DC generator RU 2233533 C2, publ. July 27, 2004, which consists of two sections mounted on one shaft. The disadvantage of this invention is that the resulting current also has a sinusoidal shape, which is rectified through the thyristor unit, and at the same time requires additional cooling, and the output still does not produce a perfectly flat current.

Disclosure of invention

The objective of the invention is to create a direct current generator with absolutely flat current, which can be used to operate any technical devices, with the ability to regulate the supplied current to the excitation windings of the armatures when the load decreases or increases. The generator design consists of two armatures mounted on the same shaft with keys longitudinally offset from each other. Anchors made of electrical steel sheet have two sidewalls with segments around the circumference, forming poles and inserts fixed between them, and each of the armature sidewalls has poles of only one polarity and mutually opposite to the other. The armature windings are laid in a zigzag pattern and go around all the perimeters of the poles. On the stator, with the help of metal non-magnetic inserts, cores are fixed, consisting of packs of rings made of sheet electrical steel, with windings located on them, covering all the perimeters of the cores, with the exception of small outer sections, in the places where non-magnetic inserts are installed. The cores are opposite the poles of the armatures, which, when rotating with their poles, cross the turns of the windings of the cores, creating a large inductive forward current, in contrast to conventional DC generators, during the operation of which a sinusoidal current occurs, rectified by electronic circuits and consisting of a series of pulses, and this is not suitable for all technical devices. This DC generator will be more powerful than conventional DC generators with the same external dimensions. The cores located on the stator have an annular shape, and therefore the generated magnetic flux inside them will rotate in a circle, since opposite to each armature core they have the same polarity. All the windings of the cores are connected in series so that the general direction of the induction current is the same. The shaft rests with its ends on rolling bearings installed in bearing assemblies and fixed on the end caps of the stator, which has flanged stiffening ribs with feet. From the opposite end of the output shaft, in front of the armature, a grating is fixed with graphite brushes isolated on it, adjacent to the copper slip rings, which are isolated on the armature. Power to the armature windings is supplied through graphite brushes and copper rings rotating with the armatures. In the middle of the stator there is an opening for installing a fan that blows air into the generator, and there are openings for air exhaust around the edges of the stator. To excite the armature windings, at the initial moment of the generator operation, a battery is needed, and then it serves to control the power supply of the armature windings through transistors when the load on the generator changes. This DC generator can be operated from any drive of the required power.

Brief Description of Drawings

FIG. 1 shows an electric motor in longitudinal section, FIG. 2 shows an electric motor in cross section.

Implementation of the invention

The DC generator consists of cores (1) made of sheet electrical steel with windings (2). The cores are fixed on the stator (3) opposite the armature poles by metal non-magnetic inserts (4). Anchors are made of sheet electrical steel, and consist of two sidewalls (5), an insert (6), and a winding (7). The shaft (8), made of structural carbon steel with keys (9), rests with its ends on rolling bearings (10) installed in bearing assemblies (11) made of structural carbon steel of ordinary quality, which are fixed on the end caps (12 ), made of structural carbon steel of ordinary quality and fixed on a stator (3) with flanged stiffening ribs (13) with feet (14), and made of structural carbon steel of ordinary quality. The grid (15), installed in front of the armature, is made of carbon structural steel of ordinary quality, with graphite brushes (16) fixed to it isolated on it, which adjoin the copper slip rings (17) mounted on the armature in isolation.

The DC generator works as follows. When the generator is started, power is first supplied to the armature windings to excite them from the battery, and then, when the generator is operating in a steady state, power is supplied from the induction current of the stator cores. To control the power supply of the armature windings, transistors powered by a battery are built into the electrical circuit. When the generator armatures rotate, a constant induction current is created in the stator cores, which is used for its intended purpose.

Claims (1)

A DC generator consisting of two armatures mounted on a shaft with keys with longitudinal displacement relative to each other, made of electrical sheet steel, each having two sidewalls with segments along the circumference that form poles, and an insert fixed between them, each of the sidewalls has poles of only one polarity, opposite to the poles of the second sidewall, and the armature windings zigzag around all their perimeters, the stator with non-magnetic metal core inserts fixed on it, consisting of packs of rings made of sheet electrical steel and located opposite the poles of the anchors, the shaft, resting on the ends on rolling bearings installed in bearing assemblies, which are fixed on the end caps of the stator, which has flanged stiffeners with legs, a lattice installed at the opposite end of the output shaft in front of the armature, with graphite brushes isolated on it, adjoined to honey current collector rings, isolated on the armature, ventilation holes that are located along the edges of the stator housing and in its middle part, for installing a fan, power control elements for armature windings, consisting of transistors and a battery.

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