Energy storage flywheel device with controllable motor or generator air gap magnetic field

Abstract

The invention discloses an energy storage flywheel device with a controllable motor or generator air gap magnetic field. The energy storage flywheel device is composed of a lower end bearing seat component, a lower end cover component, a motor stator winding component, a motor stator shell component, an upper end cover component, an upper end bearing seat component, an upper end sealing cover component, a flywheel rotor, a pressing sleeve, a rotary transformer, a nut, a gasket, a screw and the like. In the device, the flywheel rotor is radially supported by mechanical bearings at the upper andlower shaft ends, and is supported by a pair of magnetic bearings in an axial direction; the charging / discharging energy conversion part of flywheel rotor is achieved by a generator with a controllable air-gap magnetic field. The air-gap magnetic field of the generator is controlled in real time by controlling the current of the annular magnet exciting coil, the counter electromotive force is improved by increasing the magnetic induction intensity, reduction of the counter electromotive force caused by reduction of the rotating speed is restrained, and the discharge depth of rated power output of the energy storage flywheel is increased. In a standby state, the current of the annular magnet exciting coil is reduced, and the standby loss of the energy storage flywheel is reduced.

Description

technical field [0001] The invention relates to the field of generators, in particular to an energy storage flywheel device with a controllable air gap magnetic field of a motor or generator. Background technique [0002] An uninterruptible power supply (UPS) is generally composed of an energy storage unit and a UPS host. When the mains fails, the UPS host converts the power of the energy storage unit into an appropriate voltage without delay for important electrical equipment or places where electricity is used. use. With the rapid development of communications and computer networks, the power requirements of important electrical equipment or places are increasing, and the safety requirements for energy storage units are also increasing. Currently, the commonly used energy storage units in the market are mainly chemical batteries, and the chemical batteries with high safety performance are lead-acid batteries, but lead-acid batteries have low energy density and short servi...

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Problems solved by technology

[0005] For the problems in related technologies, no effective solutions have been proposed yet

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