Systems and methods concerning exciterless synchronous machines
AssigneeABB Schweiz AG
InventorsGhanshyam Shrestha, Darren Tremeling, Waqas Arshad, Wen Ouyang, Jan Westerlund
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Abstract
A synchronous machine and related systems include a stator and rotor separated by an air gap. The rotor includes a rotating DC power supply coupled to exciter windings disposed adjacent the air gap. Power from air gap harmonics, including air gap slot harmonics induce current in the exciter windings, which is rectified and supplied to the rotor field windings. In operation, a desired current level in the rotor field windings can be achieved through control of the DC power supply or superposition of harmonics into the stator winding current which induces the prescribed current in exciter windings.
Claims11
A synchronous machine, comprising:
- a stator including stator windings;
- a rotor operably disposed relative to the stator, a first surface of the rotor and a second surface of the stator separated by an air gap, the rotor including a rotating DC power supply and an exciter winding disposed in the first surface of the rotor adjacent the air gap, the exciter winding electrically coupled to an input of the DC power supply and structured to receive power from the stator windings and provide the received power to the DC power supply, the DC power supply electrically coupled to a rotor winding and structured to output power to the rotor winding;
- and,
- a voltage regulator electrically coupled to the stator windings of the stator and capable of communicating control signals to the DC power supply.
The machine of claim wherein the stator winding is disposed within at least one stator winding slot, and the at least one stator winding slot is an open slot.
Dependencies are inferred from the claim text.