| 摘要 |
<p>A flywheel energy storage battery includes two solid steel flywheels free of axial through holes and axially spaced apart at their outer diameter, forming an airgap between the flywheels, and coupled together closer to the center. A bearing system supports the flywheels for rotation about a vertical axis inside a sealed container, and a motor-generator that is integrated with the flywheels accelerates and decelerates the flywheels for storing and retrieving energy. The motor- generator includes a circumferential array of alternating axial polarity magnetic poles that is attached to the flywheels, and drives magnetic flux axially back and forth across the airgap and circumferentially in each the flywheel. The motor-generator has a stator constructed of an air core armature that is located in the airgap, and includes multiple phase windings that magnetically interact with the magnetic poles to produce torque. The windings are mechanically supported in the magnetic air gap by a thermal conductive dielectric support that conducts heat generated from the windings radially outward to the container.</p> |
