Experimental study of the JGB37-520 direct current motor

BACKGROUND: The JGB37-520 direct current (DC) gear motor series are widely used in robotics and low-power electric drive systems; however, experimentally validated data on their electromechanical parameters lack in open scientific sources. The present study aims to fill this gap by means of experimental determination of the parameters of the motor as an integral electromechanical device. AIM: Experimental determination of the main electromechanical parameters of the JGB37-520 DC motor equipped with a reduction gear and an incremental encoder, used in low-power electric drive systems, for the subsequent application of the obtained data in the development of mathematical models and control systems. METHODS: The study object was a JGB37-520 DC motor assembled with a reduction gear and an incremental encoder. The motor without the gearbox was not considered due to the lack of practical application. The study was conducted under laboratory conditions. The winding resistance and inductance were determined using direct electrical measurement methods. The determination of the ke and km coefficients, as well as the moment of inertia of the output shaft, was based on experiments with a mechanical load of known weight, where the winding current, angular velocity, and angular acceleration of the shaft were measured. The measured indicators included the electrical and mechanical parameters of the motor required for its mathematical description. RESULTS: During the study, one sample of the JGB37-520 DC motor with a reduction gear and an incremental encoder was experimentally studied. The winding resistance and inductance, the moment of inertia of the output shaft, the kₑ coefficient relating angular velocity to back-electromotive force, and the kₘ coefficient relating electromagnetic torque to the winding current were determined. The obtained values describe the motor as a single electromechanical object and can be used in building the motor’s mathematical model. CONCLUSION: As a result of the conducted study, the main electromechanical parameters of the JGB37-520 motor with a reduction gear and an incremental encoder were experimentally determined. The obtained data make it possible to use this motor in problems of modeling and synthesis of control systems for low-power electric drives.