Experimental Analysis of Motor Power Losses in Energy Storage Flywheel

Energy storage flywheel plays a crucial role in power compensation within modern power systems. The motor losses affect the performance of the energy storage flywheel. A testing method for measuring motor losses based on resistance power consumption was proposed in this paper. The resistive power consumption at a certain speed during the free deceleration process was measured first, and then compared with the steady-state power consumption of the motor at that speed to obtain the motor losses. The resistive power consumption and steady-state power consumption of the energy storage flywheel were measured at multiple speeds under different vacuum levels. And the motor losses of the energy storage flywheel at a speed of 20,000 rpm were calculated to be 2.24 kW and 4.15 kW at vacuum levels of 101.325 kPa and 0.1 kPa, respectively.