External rotor flywheel energy storage device

• Main Author: MIAO LIJIE
• Format: Patent
• Language: Chinese; English
• Published: 26.11.2014
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The utility model discloses an external rotor flywheel energy storage device comprising a frame, a shaft, a rotor, and a stator. The shaft is fixedly disposed on the frame, and cannot rotate. The rotor is rotatably disposed on the shaft, and can rotate around the shaft by a bearing. The stator is fixedly disposed on the shaft, and the stator is disposed in the rotor. The inner circle of the rotor is provided with a permanent magnet in an embedded manner, and the stator is provided with a cogging-free structure. The rotor is disposed on the shaft by the mechanical bearing. The external rotor flywheel energy storage device has advantages of simple structure, low costs, large rotation inertia, high energy density, small air resistance, and small bearing rolling resistance.