Energy efficiency of motors: Replacement of electric motors and drives

You can significantly improve energy efficiency in your company by opting to replace old, inefficient electric motors. Motors are used in many industrial processes, both as standalone units and as components integrated into more complex machinery, such as water and heat pumps, air compressors, or fans.

According to many sources, electric motors account for up to 65% of all energy consumed in industry. A significant portion of this consumption can be attributed to older and inefficient motors. Energy losses generated by less efficient motors are dissipated in the form of heat, which over time reduces the efficiency of the motor and can even damage it. Therefore, replacing a motor before this process occurs is highly recommended, even if it means replacing it before it reaches the end of its operational life. Despite this, it is worth considering such action, as analyses show that the investment quickly pays off.

Improved efficiency, lower maintenance costs, avoidance of unwanted downtime, and losses are just some of the main benefits of replacing a motor. Furthermore, new, energy-efficient motors, even when not operating at full load, maintain the same efficiency. The lack of load does not negatively affect their performance and can even slightly increase it.

Motors with lower power ratings result in greater differences in efficiency. This means that investing in the replacement of such a motor with a new one will pay off in a shorter period of time.

At Energy Trend, we will analyze the cost-effectiveness of replacing electric motors with newer and more energy-efficient ones. Additionally, we will explore financing options for your investment.

The replacement of an old motor with a modern model not only increases efficiency and generates significant savings for a business but also has a positive impact on environmental protection. Many modern motors are designed to meet international IEC standards, and some also comply with local energy efficiency standards (MEPS, Minimum Efficiency Performance Standard). While international standards directly address motors, their energy efficiency potential can only be fully realized when used in conjunction with appropriate control elements such as switches, integrated contactors, motor starters, variable frequency drives, and more. Only high-quality components ensure the proper operation of motors and minimize energy consumption. In the case of subpar control elements, motors can experience accelerated wear and tear, such as frequent damage due to high inrush currents during shutdown.

To reduce energy consumption in a business, it is recommended to conduct a comprehensive analysis, preferably in the form of an energy efficiency audit. Such an approach allows for the assessment of the technical condition of machinery and buildings and provides recommendations for changes that will have the greatest impact on reducing energy consumption. Replacing old motors with modern, environmentally-friendly models not only enhances the company’s image and competitiveness in the market but also improves the working conditions for machine operators. Modern motors are typically quieter, easier to operate, and have lower failure rates.