The invention discloses a high-integration
flywheel energy storage device with a novel horizontal self-
vacuum chamber. A
vacuum chamber is formed through a casing, an upper end of the
vacuum chamber is a three-degree-of-freedom
magnetic bearing fixedly connected with the casing by a bracket, which includes a radial
magnetic bearing, an axial
magnetic bearing and a permanent
magnet, a lower end ofthe three-degree-of-freedom magnetic bearing is a
flywheel rotor, a single-winding outer rotor bearingless motor is located at a lower end of the
flywheel rotor, a rotor of the motor is mounted in anannular groove at a lower surface of the flywheel rotor, and a
stator is fixed to a lower end of the casing by a bracket. The device is advantaged in that five-degree-of-freedom balance of the flywheel rotor is realized by the three-degree-of-freedom magnetic bearing combined with the single-winding outer rotor bearingless motor, a
control mode is simplified, the integration degree is improved, ahorizontal composite
vacuum pump is arranged at an upper end of the casing, a
vacuum pump is a double-rotor structure which is mirror-symmetrical to the left and right, and the vacuum degree and the pumping speed are improved.