SU1246260A1 - Synchronous electric machine - Google Patents

Abstract

The invention relates to synchronization; machines, namely, generators with a superconducting winding of a machine. The purpose of the invention is to reduce the mass of the generator by reducing the mass of the damper winding. The machine contains a stator winding 1, a winding excitation, a, 2, an isolated damping winding 3, a contact node 4, a source of extraneous EMF 5, made controlled, and also a magnitude sensor and is entered. phase of current included in the feedback circuit of: - a controlled source of emf. At the same time, the source of the external emf 5 performs the function of the active resistance compensator in the circuit of the damper winding, which allows to significantly reduce its mass and the mass of the machine as a whole. 3 il. (f ./ 7Г rsd 4 od ISP O)

Description

The invention relates to synchronous machines, in particular to generators with a superconducting field winding.

The aim of the invention is to reduce the mass of the generator by reducing the mass of the damper winding.

FIG. 1 shows a diagram of the windings of a synchronous generator connected in phase to an insulated damper winding of sources of external electromotive force using contact rings; in fig. 2 shows an example of making a third-party EMF source with a current sensor; on

FIG. 3 is an example of contactless performance (5 consecutive excitations. The role

source of a third-party EMF inverted by a synchronous generator.

The electric machine contains a stator winding 1, a field winding 2, an isolated damper winding 10 and a signal U is applied.

ku 3, contact node 4, the source of 5 third-party EMF;

The source of another 5 EMF (Fig. 2). Contains, for example, a thyristor voltage converter 6, control blocks 7, a summation block 8, a power supply block 9. A current sensor 10 connected to a block 8 summed is included in the damper winding circuit 3.

To ensure non-contact of the machine, sources 5 of the external emf can be placed on the rotor 1 of the machine and connected to the winding 12 of the synchronous generator 13 with the excitation winding 14 placed on the stator 15 of the machine,

The work of the electric machine is carried out as follows

When nonsynchronous occur

fields generating EMF of low frequency 40 and multiphase isolated from the rotor

You are in the damper winding, in the damper winding circuit, the source of the external emf flows a low frequency current, and the source of the external electromotive force provides the power that covers most of the ohmic losses in the damping winding, which is equivalent to increasing its constant time, therefore the source

12462602

the external emf in this case performs the function of the active resistance compensator.

Such a source creates an emf that is: proportional in amplitude to the current flowing through it and directed

at each time point in accordance with this current, creating the effect of negative active resistance due to the supply of additional power.

These sources of emf are known in the practice of electrodynamic modeling and can be implemented also in the form of a collector generator.

the current sensor in this case is performed by a series field winding. To the input of the converter 6 of the source 5 current through the adder 8 from the sensor

positive feedback on the current flowing in the phase. damping winding. This creates an emf U, is proportional to this current and is

In this phase, as a result, the equivalent resistance of the circuit of the damping winding can be reduced to ten times, which allows to obtain a sufficient level of damping of low-frequency magnetic fields in the presence of a damping winding of a reduced mass.

35

F o I) m l

the invention

Synchronous electric machine containing a stator with a multi-phase winding, a rotor with an excitation winding

damping winding, characterized in that, in order to reduce the mass of the machine by reducing the mass of the damping winding, a controlled source of EMF and a current size and phase sensor included in the feedback circuit of the controlled source of EMF are inserted into the damper circuit,

eight

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FIG.

Compiled by V, Treguboy Editor A. Vorovich Tehred N. Bonkalo

Order 4015/50 Circulation 631 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035-, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Proofreader E. Sirohman

Claims (1)

35 For mula of the invention t A synchronous electric machine containing a stator with a multiphase winding, a rotor with an excitation winding and a multiphase damper winding isolated from the rotor, characterized in that, in order to reduce the mass of the machine by reducing the mass of the damper winding, a controlled emf source and a magnitude sensor are introduced into the damper circuit 45 of the winding and current phase included in the feedback circuit of the controlled source of EMF.