SU4796A1 - Dynamo-electric machine with several windings on the bark, allowing independent control of the voltage of these windings - Google Patents

Description

In various kinds of special installations, it is very often necessary to convert the direct current of one voltage into the direct current of two other voltages. Such a need was particularly felt, for example, in the field of radio telephony, when using transmitters with tube generators, due to the fact that the voltage of the incandescent and anode circuit is very different from the voltage adopted in the practice of urban networks. In these cases, motor-generators are usually used, consisting of an electric motor, powered by mains voltage, and two dynamos of low and high voltages — one for feeding the filament, the other — an anode circuit. In some cases, a combination of a single root mask and a battery of batteries is used to power the filaments. The first method represents the inconvenience that makes supplying the installation with three machines and thus increases its cost and size, while the second method requires the presence of batteries and devices for their charging. Both of these deficiencies are absent when the sending stations are equipped with a dynamo-electric machine with several windings on the bark (three-collector).

FIG. 1 and 2 show a longitudinal section and diagram of a three-collector dynamo-electric machine; and FIG. A 3-diagram of a three-collector dynamo-electric machine, in which the motor is a four-pole machine, a high-voltage generator — a two-pole machine, and a low-voltage generator — an eight-pole machine.

The proposed dynamo-electric machine (Fig. 1 and 2) consists of the core A and the body F, equipped with pole cores. Anchor, unlike conventional DC machines, has three

self-winding windings, the ends of which are connected each, respectively, to its collector LG Kg, / sz ;; {one of the collectors is supplied with current from the network; thus, the machine operates as an engine; the other two collectors, together with the windings attached to them, are used to obtain the direct current of two predetermined voltages. Thus, a dynamo-electric machine is one crust machine with three collectors and three independent crust windings with a sheath, with its magnetic circuit.

As for the magnetic system I of the machine, here, depending on the requirements, there may be two options. In the simplest case, when the voltage control of the generator windings is not required, all three crust windings are calculated for the same number of poles, and the machine, with respect to the magnetic system, is no different from conventional DC machines.

If it is necessary to adjust the voltage at one or both generator windings, a combined machine excitation system is used. In this case, each root winding for which voltage adjustment is required is calculated for a number of poles different from the number of poles of the motor winding. Along with jste on the inductor of the machine | additional winding is placed | excitation, creating a magnetic flux with a number of poles corresponding to the number of poles, adjustable core winding. In order to ensure independence of adjustment, it is necessary that the numbers of poles of the electric motor and generator windings requiring adjustment be in mutual relation 20, i

-, where a is some integer, i

As an example, can serve | the machine diagram according to fig. 3, in which the engine is

a quadrupole machine with poles indicated in the drawing through 2 and a winding A- connected to the collector Кч ,, high voltage generator - a two-pole machine and 5) with winding A and a collector K., and a low voltage generator - an eight-pole machine with winding LD and manifold LzVse three machines have one common measles and one common rmo.

To realize the possibility of creating a system with 2pi, 2p ,, 2p poles with one common system, it is most convenient to use an inductor with not clearly expressed poles, like the stators of alternating current machines. In this case, the inductor of the machine is made in the form of a serrated stator with a number of teeth a multiple of the number of poles of each winding of the core, and three independent field windings for the required number of poles are inserted into the resulting cavities of the stator.

All that is said about the three-collector machine ,. can be extended to the case of four-collector, cyclic collector, and in general multi-collector machines, i.e. one crustal machine with several independent core windings and collectors. In cases where alternating current is required instead of constant current, the collectors may be replaced with slip rings.

The subject of the patent.

1. A dynamo-electric machine with several windings on the bark, allowing independent regulation of the voltage of these windings, characterized by the fact that its measles has several separate collector windings made for different numbers of poles, and the total magnetic circuit is supplied with several exciter windings. No direct current, arranged in such a way that the corresponding number of poles corresponds to each core winding (Fig. 3).

2. Alteration of the machine described in paragraph 1, characterized in that, in order to obtain an alternating current from it, the core windings of it are provided with rings instead of collectors.

3. The use of the machine described in paragraphs 1 and 2 as a motor-generator, consisting in the fact that one of the core windings is used to turn the machine as a motor to turn on the current source circuit, and all the others to generate current at different tensions

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fig 2.

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