Upgrading the grinding machine’s control system
Students Name: Petrunenko Danylo
Qualification Level: magister
Speciality: Electrical Energetics, Electrical Engineering and Electromechanics
Institute: Institute of Power Engineering and Control Systems
Mode of Study: full
Academic Year: 2024-2025 н.р.
Language of Defence: ukrainian
Abstract: The master’s qualification thesis is aimed at improving the efficiency of a centerless grinding machine by implementing modern automation methods and upgrading the drive system of the regulating wheel. The primary focus is on studying the operation of an asynchronous motor with a frequency-controlled drive to ensure precision, rotational stability, and reduced energy consumption. The work explores the potential of using the Sinamics G120 series frequency converter to control the asynchronous motor, upgrades the ventilation unit to ensure reliable cooling at low rotation speeds, and analyzes structural modifications to the motor to enhance its energy efficiency. In the first chapter, the features of centerless grinding machines and their impact on the quality of part processing are considered. The technical characteristics of the machines, the structural features of the regulating wheel, and the operation of asynchronous motors with frequency control are analyzed. The second chapter presents the selection of an asynchronous motor and frequency converter for the regulating wheel system. Parameterization of the drive system is carried out considering the machine’s operating characteristics. The installation of power and control components of the drive is also described. The third chapter is devoted to modernizing the motor’s cooling unit. A design with a built-in axial fan is proposed to provide effective cooling even at low rotation speeds. The fan’s performance and connection parameters to the power supply are calculated. An analysis of the upgraded system’s performance is conducted, including energy efficiency, stability of the regulating wheel rotation, reduction of heat losses, and its impact on the quality of part processing. 7 The object of the study is a centerless grinding machine with a modernized drive system. The subject of the study is the methods of automation and drive upgrades to improve accuracy, stability, and productivity. The aim of the work is to implement modern frequency-controlled drives to ensure high efficiency of grinding machines and reduce energy costs. Keywords: grinding machine, asynchronous motor, frequency converter, modernization, energy efficiency, automation, ventilation unit, Sinamics G120. References: 1. Mago, J. P., Reigosa, M. J., & Conejo, J. A. (2021). Effective frequency control for induction electric drives under overload conditions. Springer. Retrieved from https://link.springer.com 2. Mohd, M. S. K., & Rehman, M. M. (2022). Induction motor drives with frequency control for industrial applications. Springer. Retrieved from https://link.springer.com 3. Variable frequency and voltage control of induction motors for electric drive systems. (2021). Springer. Retrieved from https://link.springer.com 4. Simplified method for calculating mechanical and electromechanical characteristics of induction motors. (2019). IEEE Transactions. Retrieved from https://ieeexplore.ieee.org