Abstract: Cooled stators described herein include an inner body, an outer body disposed concentrically around the inner body and extending between the first end and the second end of the cooled stator, a plurality of stator poles extending radially between the inner body and the outer body and extending longitudinally along at least a portion of the inner body, at least one stator winding wound about each of the plurality of stator poles, a plenum chamber engaged with the inner body and the outer body to enclose the cooled stator at the second end, an inlet defined in each of the plurality of stator poles proximate the first end of the cooled stator, and at least one coolant passage extending longitudinally through each of the plurality of stator poles between the inlet and an outlet in fluid communication with the plenum chamber.

Abstract: Composite rotors provided herein include a rotor body extending along a longitudinal axis including a first component extending longitudinally along at least a portion of the rotor body and a second component extending longitudinally along at least a portion of the rotor body, at least a portion of the second component disposed concentrically around the first component, wherein the first component and the second component together define an internal region, wherein a radial thickness of the first component and a radial thickness of the second component vary along the longitudinal axis. The composite rotor also includes at least one magnet disposed on an inner surface of at least one of the first component or the second component within the internal region.

Abstract: Rotor hubs described herein include a frustoconical body having a base, a frustum, and a longitudinal axis extending therebetween, and a plurality of elongated protrusions spaced about a circumference of the base and extending from the base parallel to the longitudinal axis.

Abstract: Cooled stators described herein include an inner body, an outer body disposed concentrically around the inner body and extending between the first end and the second end of the cooled stator, a plurality of stator poles extending radially between the inner body and the outer body and extending longitudinally along at least a portion of the inner body, at least one stator winding wound about each of the plurality of stator poles, a plenum chamber engaged with the inner body and the outer body to enclose the cooled stator at the second end, an inlet defined in each of the plurality of stator poles proximate the first end of the cooled stator, and at least one coolant passage extending longitudinally through each of the plurality of stator poles between the inlet and an outlet in fluid communication with the plenum chamber.

Abstract: Rotor hubs described herein include a frustoconical body having a base, a frustum, and a longitudinal axis extending therebetween, and a plurality of elongated protrusions spaced about a circumference of the base and extending from the base parallel to the longitudinal axis.

Abstract: Composite rotors provided herein include a rotor body extending along a longitudinal axis including a first component extending longitudinally along at least a portion of the rotor body and a second component extending longitudinally along at least a portion of the rotor body, at least a portion of the second component disposed concentrically around the first component, wherein the first component and the second component together define an internal region, wherein a radial thickness of the first component and a radial thickness of the second component vary along the longitudinal axis. The composite rotor also includes at least one magnet disposed on an inner surface of at least one of the first component or the second component within the internal region.

Abstract: A method for controlling AC frequency of electrical power being distributed to an electrical distribution network that is connected to one or more electrical loads and to one or more power sources includes: electrically coupling an energy storage sub-system to the electrical distribution network, said energy storage sub-system including one or more flywheel energy storage systems; and controlling operation of each of the flywheel energy storage systems responsive to the AC frequency of the electrical power, so the electrical storage subsystem injects or absorbs an amount of electrical energy into or from the electrical distribution network so as to regulate the AC frequency of the electrical power being distributed to the electrical distribution network so as to be at or about a desired AC frequency.

Abstract: Featured are methods for regulating the AC frequency of the electrical power be supplied on an electrical distribution system or grid. Such a method includes electrically coupling an energy storage sub-system to the electrical distribution network, where the energy storage sub-system includes one or more flywheel energy storage systems. Also featured as devices, systems and apparatuses embodying such methodologies or for use in implementing such methodologies of the present invention.

Abstract: Featured are methods for regulating the AC frequency of the electrical power be supplied on an electrical distribution system or grid. Such a method includes electrically coupling an energy storage sub-system to the electrical distribution network, where the energy storage sub-system includes one or more flywheel energy storage systems. Also featured as devices, systems and apparatuses embodying such methodologies or for use in implementing such methodologies of the present invention.

Abstract: Featured are methods for regulating the AC frequency of the electrical power to be supplied on an electrical distribution system or grid. Such a method includes electrically coupling an energy storage sub-system to the electrical distribution network, where the energy storage sub-system includes one or more flywheel energy storage systems. Also featured as devices, systems and apparatuses embodying such methodologies or for use in implementing such methodologies of the present invention.

Abstract: Featured are methods for regulating the AC frequency of the electrical power to be supplied on an electrical distribution system or grid. Such a method includes electrically coupling an energy storage sub-system to the electrical distribution network, where the energy storage sub-system includes one or more flywheel energy storage systems. Also featured as devices, systems and apparatuses embodying such methodologies or for use in implementing such methodologies of the present invention.

Abstract: Featured are methods for regulating the AC frequency of the electrical power be supplied on an electrical distribution system or grid. Such a method includes electrically coupling an energy storage sub-system to the electrical distribution network, where the energy storage sub-system includes one or more flywheel energy storage systems. Also featured as devices, systems and apparatuses embodying such methodologies or for use in implementing such methodologies of the present invention.

Abstract: A method and system for operating a mini-grid including one or more power generation sources and one or more loads independently from a utility grid is provided, where the mini-grid is disconnected from the utility grid in response to a power disruption over the utility grid. A universal interconnect device forms a connection between the mini-grid and the utility grid. In the disconnected state, the mini-grid operates independently from the utility grid, such that the power generation sources of the mini-grid supply the loads. Frequency and voltage regulation are provided by the universal interconnect device through a monitoring function performed by a controller in conjunction with at least an energy storage device, which can absorb or generate power as needed.

Abstract: A method and system for operating a mini-grid including one or more power generation sources and one or more loads independently from a utility grid is provided, where the mini-grid is disconnected from the utility grid in response to a power disruption over the utility grid. A universal interconnect device forms a connection between the mini-grid and the utility grid. In the disconnected state, the mini-grid operates independently from the utility grid, such that the power generation sources of the mini-grid supply the loads. Frequency and voltage regulation are provided by the universal interconnect device through a monitoring function performed by a controller in conjunction with at least an energy storage device, which can absorb or generate power as needed.

Abstract: A crash management system for implementation in a flywheel energy storage system (FESS) is provided. Implementation of such a system entails designing an FESS rim that is highly failure resistant, and designing the FESS such that if one, some, or even all of its components fail, they are physically prevented from accumulating and releasing enough energy to cause rim burst, thus leaving the rim intact and capable of safely remaining spinning even after one or more FESS component failures have occurred.

Abstract: A crash management system for implementation in a flywheel energy storage system (FESS) is provided. Implementation of such a system entails designing an FESS rim that is highly failure resistant, and designing the FESS such that if one, some, or even all of its components fail, they are physically prevented from accumulating and releasing enough energy to cause rim burst, thus leaving the rim intact and capable of safely remaining spinning even after one or more FESS component failures have occurred.

Abstract: A crash management system for implementation in a flywheel energy storage system (FESS) is provided. Implementation of such a system entails designing an FESS rim that is highly failure resistant, and designing the FESS such that if one, some, or even all of its components fail, they are physically prevented from accumulating and releasing enough energy to cause rim burst, thus leaving the rim intact and capable of safely remaining spinning even after one or more FESS component failures have occurred.