Doubly stator-fed synchronous generator

Patent metadata

Field	Value
Publication number	US-10122307-B2
Application number	US-201514932183-A
Country	US
Kind code	B2
Filing date	Nov 4, 2015
Priority date	Nov 4, 2015
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

According to an aspect of the disclosure herein, a generator is provided herein. The generator includes a rotor that further includes a plurality of slots. The generator also includes a three-phase winding configured to produce a first magnetic field and an excitation winding. The excitation winding is a material filling in the plurality of slots and produces a second magnetic field. In turn, a rotation of the generator induces alternating voltage in the stator three-phase winding and the stator excitation winding excites the magnetic flux in the rotor.

First claim

The invention claimed is:

1. A brushless synchronous machine comprising a doubly-fed alternating current generator and an excitation system, the doubly-fed alternating current generator comprising:
a rotor comprising a plurality of slots and a ferromagnetic core, plurality of slots being filled in by a material comprising aluminum or an alloy to form a plurality of magnetic flux barriers to provide no rotor excitation losses by dissipating power losses to a stator;
a three-phase winding configured to produce a first magnetic field; and
an excitation winding comprising a same material as the material filling in the plurality of slots and configured to produce a second magnetic field,
wherein a rotation of the generator induces alternating voltage in the three-phase winding, and
wherein the excitation winding excites a magnetic flux in the rotor,
wherein the generator is coupled to the excitation system,
wherein the excitation system comprises a controlled rectifier, a current control, and a microcontroller, the current control being configured to adjust a direct current field excitation current based on a control signal from the microcontroller to produce an output current to the excitation winding, the microcontroller being configured to monitor a real time voltage and a current of the three-phase winding and the excitation winding and provide a control signal to the current control based on the monitoring, the control signal cause the current control to adjust the direct current field excitation current so the excitation system provides a stable current to the excitation winding during excitation, and the controlled rectifier being configured to convert alternating current power from a three-phase grid to a direct current field excitation current that is fed to the current control.

2. The doubly-fed alternating current generator of claim 1 , further comprising a prime mover of the generator drives the rotor.

Assignees

• Hamilton Sundstrand Corp

Inventors

• Gieras Jacek F

Classifications

• H02P9/302

  Brushless excitation · CPC title

• H02K19/14

  having additional short-circuited windings for starting as asynchronous motors · CPC title

• H02P9/007 Primary

  Control circuits for doubly fed generators · CPC title

• H02K1/246

  Variable reluctance rotors · CPC title

• H02K3/20

  for auxiliary purposes, e.g. damping or commutating · CPC title