Acquisition approach of moment of inertia based on brushless DC torque motor

Abstract

In order to meet the requirements of the small moment of inertia of the brushless DC torque motor, the optimal design of the shafting and the research on the measurement method were carried out on the basis of the structure of the flat motor rotor and the high-precision sensor. In this paper, ProE5.0 software is used to model and simulate the shaft structure of the permanent magnet synchronous motor. After comparing the common measurement methods of the moment of inertia, the single-wire torsional oscillation method is used to test and verify the moment of inertia of typical structural parts. The moment of inertia of the motor rotor is simulated and identified by the speed jammer identification algorithm.The test results show that the identification error of the constructed identification algorithm is less than 5% for the moment of inertia identification. After the brushless DC torque motor is assembled, the method can be used as a verification method for the parameters of the moment of inertia, which has strong practical significance.