US 4,229,689 AGranted

AC Synchronized generator

OwnerLeo G. Nickoladzeinventor

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Abstract

An AC synchronized generator includes an exciter stage and a generating stage, the exciter stage comprising an exciter stator connected for excitation to any conventional AC source and an exciter rotor driven in rotation therein by any convenient source of rotary power. The exciter rotor is mounted for common rotation with a generator rotor, the windings of the exciter rotor being connected in subtraction, or in an inverted connection with those of the generator rotor. A generator stator is then used to produce the current to a load. In this form the rotating magnetic field of the exciter stator will be added to the angular rate of the exciter rotor, which is therefor induced at an AC rate corresponding to the sum of these two angular rates. The generator rotor, being electrically connected in opposite direction but driven along with the exciter rotor, will carry a magnetic field which travels as the difference between the magnetic field in the exciter rotor and the rotor angular rate. The net difference that will appear at the generator stator will be equal to the rate of the AC source. Thus the load will see a generated current at the frequency of the AC source.

A generator referenced to the frequency of the alternating current of a public utility comprising:

an annular exciter stator including a plurality of exciter electromagnetic poles connected for excitation by said alternating current for producing a first magnetic vector therebetween at an angle rate corresponding to the frequency of said alternating current, said exciter stator including a rotary mounting for the angular alignment thereof and an arcuate rack formed on the exterior;
an exciter rotor mounted for rotation on the interior of said exciter stator, said exciter rotor including a plurality of electromagnet exciter inductors conformed for inductive coupling with said exciter poles for producing an excited current thereon of a phase and frequency corresponding to the summation of said angular rate of said first magnetic vector and the rotational rate of said exciter rotor;
a generating rotor connected for common rotation with said exciter rotor, said generating rotor including a plurality of electromagnetic generating inductors corresponding to said exciter inductors and connected in opposite alignment therewith, said generating inductors being displaced in angle relative said exciter inductors whereby a second magnetic vector of opposite angular rate to that of said exciting current is produced by said generating inductors;
an angular generating stator mounted in surrounding relationship around said generating rotor, said generating stator including a plurality of electromagnetic generating poles aligned for electromagnetic induction by the advance of said magnetic vector on the interior thereof;
power means connected for angular advancement of said exciter and generating rotor;
a servo motor connected for engagement with said rack for angular advancement of said stator;
and,
phase comparing means connected to said alternating current, and the signal induced on said generating poles for advancing said servo motor in rotation according to the phase difference therebetween.

5 more elements

Facts

Application

06/088,161Filed 5 Nov 1979

Granted

21 Oct 1980

Term ends

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Classification5 codes

H02P 9/42
Arrangements for controlling electric generators for the purpose of obtaining a desired output: to obtain desired frequency without varying speed…
H02K 19/26
Synchronous generators: characterised by the arrangement of exciting windings
H02K 7/1838
Wherein the turbine is a wind turbine: generators mounted in a nacelle or similar structure of a horizontal axis wind turbine
H02P
Control or regulation of electric motors, electric generators or dynamo-electric converters

Abstract

Claims1