Enhancement of stator leakage inductance in air-core machines
AssigneeAmerican Superconductor Corporation
InventorsSwarn S. Kalsi, Gregory L. Snitchler
Life of this patent
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Abstract
A method of maintaining a desired level of sub-transient reactance in a superconducting machine includes specifying a desired level of sub-transient reactance. A stator assembly is produced that includes at least one stator coil assembly having a first predefined length. A rotor assembly is produced that is configured to rotate within the stator assembly. An asynchronous field filtering shield, having a second predefined length that is less than the first predefined length, is positioned between the stator assembly and the rotor assembly. The desired level of sub-transient reactance is achieved by adjusting either the first predefined length or the second predefined length.
Claims6
A method of maintaining a desired level of sub-transient reactance in a superconducting machine comprising:
- specifying a desired level of sub-transient reactance;
- producing a stator assembly including at least one stator coil assembly having a first predefined length;
- producing a rotor assembly configured to rotate within the stator assembly;
- and
- positioning an asynchronous field filtering shield, having a second predefined length that is less than said first predefined length, between the stator assembly and the rotor assembly;
- wherein one of the first and second predefined lengths is adjusted to achieve the desired level of sub-transient reactance.
A method of maintaining a desired level of sub-transient reactance comprising:
- specifying a desired level of sub-transient reactance;
- producing a stator assembly including at least one stator coil assembly having a first predefined length and including a center section and a pair of end-turn sections positioned at distal ends of the center section;
- producing a rotor assembly configured to rotate within the stator assembly;
- positioning an asynchronous field filtering shield, having a second predefined length which is less than said first predefined length, between the stator assembly and the rotor assembly;
- and
- flaring the end-turn sections of the at least one stator coil assembly radially away from the asynchronous field filtering shield, thus creating an expanded gap between the end-turn sections and the asynchronous field filtering shield;
- wherein one of the first and second predefined lengths is adjusted to achieve the desired level of sub-transient reactance.
Dependencies are inferred from the claim text.