SUSTAINABLE AGRICULTURAL IRRIGATION TECHNOLOGIES BASED ON ENERGY-EFFICIENT ELECTRIC MOTORS

This study examines energy consumption characteristics of agricultural irrigation systems in which pumping units driven by electric motors play a central role. It is shown that the widespread use of conventional induction motors often results in inefficient electricity utilization, especially under fluctuating operating conditions, leading to increased energy losses and higher operating costs. These inefficiencies are particularly evident in systems operating under partial load or varying flow requirements, where traditional motors are unable to adapt effectively to changing demands. As an alternative, the application of modern energy-efficient electric motors compliant with current efficiency standards is considered. The paper presents a comparative assessment of standard induction motors and high-efficiency solutions offered by manufacturers such as Siemens, ABB, and WEG. Special focus is placed on advanced technologies, including variable frequency drives, permanent magnet synchronous motors, and motors of IE3-IE4 efficiency classes, which provide improved performance and adaptability. The results indicate that the adoption of these technologies allows for a reduction in energy consumption by approximately 20-35%, depending on operating conditions and system configuration. In addition to energy savings, these solutions contribute to reduced mechanical wear, lower maintenance requirements, and enhanced operational flexibility. An economic analysis confirms that the additional investment required for energy-efficient motors can be offset within 2-3 years through savings in electricity costs. The findings demonstrate that integrating energy-efficient electric motors into irrigation pumping systems is a practical, reliable, and cost-effective approach, contributing to improved system performance, operational reliability, and long-term sustainability of agricultural irrigation. Furthermore, the results highlight the importance of implementing adaptive control strategies in irrigation systems to maximize energy efficiency. The proposed approach can serve as a basis for future modernization of agricultural energy infrastructure and support sustainable resource management.