Influence of battery voltage on the electromechanical characteristics of the stepper drive for rotation of the platform of a gas detonation mortar
DOI:
https://doi.org/10.15588/1607-6761-2025-3-2Keywords:
stepper motor, rotary platform, gas-detonation mortar, battery voltage, setpoint current, vibration torqueAbstract
Purpose. Determine the dependence of the influence of the battery voltage, which determines the level of its charge, on the maximum and vibration moments, as well as the effective value of the motor phase current, which identify the efficiency of the drive for rotating the platform of a gas-detonation mortar.
Methodology. Simulation modeling method.
Findings. A simulation model of a stepper drive has been developed, the peculiarity of which is the consideration of the design parameters of the load, stepper motor and semiconductor converter, parameters of the control system and stepper motor; a set of numerical experiments has been carried out on the simulation model to determine the influence of the battery voltage level and the setpoint current on the effective current of the motor phase, its vibration and maximum moments; it has been determined that controlling the setpoint current can lead to stabilization of the operating modes of the gas-detonation mortar platform rotation drive when the power battery is discharged and its voltage decreases. It has been determined that the effective value of the phase current is variable. The change in the effective current value from the setpoint current increases with an increase in the supply voltage from 2.41 A to 3.23 A at a battery voltage of 27 V. At low voltage values, the effect of the setpoint current on the effective value of the motor phase current is insignificant from 1.52 A to 1.58 A. When the battery voltage increases from 22 V to 27 V, a monotonous increase in the effective phase current is observed at all values of the setpoint current. The level of vibration torque on the motor shaft increases significantly with an increase in battery voltage. The setpoint current reduces the vibration level, however, this reduction is effective only at battery voltages from 26 V to 27 V. It has been determined that at high battery voltage values and high values of the setpoint current, a significant increase in maximum starting torques is observed. Therefore, when starting the drive, a forced reduction of the setpoint current to the level of 4.5 A is recommended.
Originality. For the first time, the dependences of the effective values of phase currents and the level of vibration, maximum moments of the stepper drive for rotating the platform of a gas-denotation mortar on the voltage of the power battery have been determined, which can be used when creating an automated control system.
Practical value. The obtained research results can be used in practice when creating an automated electric drive for turning a gas-detonation mortar based on a stepper motor by selecting the parameters of the setpoint current for the semiconductor converter, in accordance with the voltage level of the battery.
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