Research on Moment of Inertia Measurement Method

International Conference on Manufacturing Technology, Materials and Chemical Engineering

材料科学;化学工业

Wang, Yafei^1

Institite of Materials, CAEP, Mianyang

621900, China^1

关键词: Experiment data;    Linear relationships;    Load moment;    Math model;    Maximum error;    Moment of inertia;    Stator currents;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/592/1/012078/pdf
DOI  :  10.1088/1757-899X/592/1/012078

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

A method for measuring the moment of inertia has been proposed. The dynamic model of stator current and load moment of inertia during the motor's frequency speed control has been built. Research show that load moment of inertia and the max of stator current are submitting linear relationship, which means that moment of inertia can been calculated after the stator current during the motor's frequency speed control has been measured. Finally, the linear relationship between the moment of inertia and the stator current has been proved with a series of experiment, therefore, the feasibility of the method has been validated. The method has a better repeatability while the repeatability error is 3%.However, by recalculating the experiment data with the math model, the result indicate that the maximum error is 39%.The main factors of the error are math model building error and the instrument uncertainty. In order to improve the precision of the moment of inertia measurement, research should be taken to build a more exact math model.