Double circuit generator
As -wound generator (also: composite generator or Compound generator respectively Compound generator ), the design of a electric generator refers to a combination of shunt and series wound generator represents (series-wound generator).
description
The double circuit generator has two excitation windings which are attached to the same main pole . These two windings consist of a shunt winding and the other a series winding . A field regulator is connected in series with the shunt winding. The series winding with the shunt circuit is usually connected in such a way that the magnetic fields have the same directions with one another and thus strengthen the magnetic field of the stator when the machine is loaded. As a result, the electrical voltage of the double circuit generator - in contrast to the shunt generator - is higher under load .
If the voltage of a generator is almost independent of the load, it is called compounded . If the generator is overcompounded , the voltage increases under load. In the case of counter-compounding , the series winding is switched in such a way that the magnetism in the stator decreases when there is a load and thus the voltage also drops sharply.
use
Double circuit generators are used as excitation machines to supply the excitation current for synchronous generators .
literature
- Hans-Ulrich Giersch, Hans Harthus, Norbert Vogelsang: Electrical machines. Testing, standardization, power electronics. 5th, corrected edition. Vieweg, Stuttgart et al. 2003, ISBN 3-519-46821-2 , pp. 121, 125/126, 387.
- Herbert Bernstein: Electrical engineering / electronics for mechanical engineers. Basics and Applications. Vieweg, Wiesbaden 2004, ISBN 3-528-03969-8 , pp. 293-296, 354.
- Gerd Fehmel, Peter Behrends: Electrical machines (= Vogel book. The master's examination. ). 13th, revised edition. Vogel Buchverlag, Würzburg 2004, ISBN 3-8023-1981-8 .
Web links
- DC machine as a generator , 8ung.at
- DC generator and DC motor (PDF file, 629 kB), University of Erlangen , p. 2 (8 p.)
- Motorfibel - Probably the craziest book about crazy motors (PDF file, 3.28 MB), Stadtwerke Bochum , p. 17/18 and 16/17 (60 p.)