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Parameters estimation of BLDC motor for energy storage system

This paper presents a statistical method to estimate the parameters of the brushless dc (BLDC) motor of a flywheel system for energy storage. The principle of the estimation is based on least square estimation under a reasonable constraint. Method is suitable to avoid using complicated test apparatus. Torque constant, static friction coefficient, vicious friction coefficient and inertia moment can be estimated. Furthermore, copper loss, iron loss, mechanical loss and other loss can be computed from these estimation and measurement data. By the proposed method, it is demonstrated experimentally that accuracy estimation can be achieved.