Superconducting rotating machine and method of controlling superconducting rotating machine

A superconducting rotating machine comprising:

• a stator that has a tubular stator iron core and stator windings wound around the stator iron core and generates a rotating magnetic field;
• a superconducting rotor having:
• a superconducting squirrel-cage winding that is held rotatably with the rotating magnetic field of the stator and has one or more rotor bars and end rings each made of a superconducting material;
• and a rotor iron core that has a plurality of slots to accommodate the rotor bars;
• a driving voltage output unit that applies a driving voltage to the stator windings to rotationally drive the superconducting rotor,
• a pulse voltage output unit that outputs a pulse voltage to shift the superconducting squirrel-cage winding from at least one of a magnetic shielding state and a magnetic flux trapping state to a magnetic flux flow state;
• and
• a pulse magnetic field output unit that generates a pulse magnetic field by a pulse voltage output from the pulse voltage output unit,
• the superconducting rotating machine being capable of shifting from a slip rotation mode to a synchronous rotation mode,
• wherein a pulse magnetic field output from the pulse magnetic field output unit is applied to the superconducting rotor, and the superconducting squirrel-cage winding is shifted from at least one of the magnetic shielding state and the magnetic flux trapping state to the magnetic flux flow state to shift to the slip rotation mode.

A method of controlling a superconducting rotating machine,

• the superconducting rotating machine including:
• a stator that has a tubular stator iron core and stator windings wound around the stator iron core and generates a rotating magnetic field;
• and
• a superconducting rotor having:
• a superconducting squirrel-cage winding that is held rotatably with the rotating magnetic field of the stator and has one or more rotor bars and end rings each made of a superconducting material;
• and a rotor iron core that has a plurality of slots to accommodate the rotor bars,
• the superconducting rotating machine being capable of shifting from a slip rotation mode to a synchronous rotation mode,
• the method comprising:
• applying a driving voltage to the stator windings to rotationally drive the superconducting rotor;
• and
• applying a pulse voltage to the superconducting rotating machine to superimpose the pulse voltage on the driving voltage in order to shift the superconducting squirrel-cage winding from at least one of a magnetic shielding state and a magnetic flux trapping state to a magnetic flux flow state, and shifting the superconducting squirrel-cage winding from at least one of the magnetic shielding state and the magnetic flux trapping state to the magnetic flux flow state to shift the superconducting squirrel-cage winding to the slip rotation mode.

A method of controlling a superconducting rotating machine,

• the superconducting rotating machine including:
• a stator that has a tubular stator iron core and stator windings wound around the stator iron core and generates a rotating magnetic field;
• and
• a superconducting rotor having:
• a superconducting squirrel-cage winding that is held rotatably with the rotating magnetic field of the stator and has one or more rotor bars and end rings each made of a superconducting material;
• and a rotor iron core that has a plurality of slots to accommodate the rotor bars,
• the superconducting rotating machine being capable of shifting from a slip rotation mode to a synchronous rotation mode,
• the method comprising:
• applying a driving voltage to the stator windings to rotationally drive the superconducting rotor;
• and
• outputting a pulse voltage to shift the superconducting squirrel-cage winding from at least one of a magnetic shielding state and a magnetic flux trapping state to a magnetic flux flow state, and converting the pulse voltage into a pulse magnetic field;
• and
• applying the pulse magnetic field to the superconducting rotor, and shifting the superconducting squirrel-cage winding from at least one of the magnetic shielding state and the magnetic flux trapping state to the magnetic flux flow state to shift the superconducting squirrel-cage winding to the slip rotation mode.