An effective way to improve motor performance

  • Date:2019-11-22
  • When considering energy efficiency Vacuum Cleaner Motors improvements to a factory's motor systems, a systems approach incorporating pumps, compressors, and fans must be used in order to attain optimal savings and performance. In the following, considerations with respect to energy use and energy saving opportunities for a motor system are presented and in some cases illustrated by case studies. Pumping, fan and compressed air systems are discussed in addition to the electric motors.A motor management plan is an essential part of a plant's energy management strategy.

    Having a motor management plan in place can help companies realize long-term motor system energy savings and will ensure that motor failures are handled in a quick and cost effective manner. The key elements for a sound motor management plan are:The purposes of motor maintenance are to prolong motor life and to foresee a motor failure. Motor maintenance measures can therefore be categorized as either preventative or predictive. Preventative measures, include voltage imbalance minimization, load consideration, motor alignment, lubrication and motor ventilation. Some of them aim to prevent increased motor temperature which leads to increased winding resistance, shortened motor life, and increased energy consumption.

    The purpose of predictive motor maintenance is to observe ongoing motor temperature, vibration, and other operating data to identify when it becomes necessary to overhaul or replace a motor before failure occurs. The savings from motor maintenance program could range from 2 to 30% of total motor system energy use.Energy-efficient motors reduce energy losses through improved design, better materials, tighter tolerances, and improved manufacturing techniques.

    With proper installation, energy-efficient motors can also stay cooler, may help reduce facility heating loads, and have higher service factors, longer bearing life, longer insulation life, and less vibration. The choice of installing a premium efficiency motor strongly depends on motor operating conditions and the life cycle costs associated with the investment. In general, premium efficiency motors are most economically attractive when replacing motors with annual operation exceeding 2,000 hours/year. Sometimes, even replacing an operating motor with a premium efficiency model may have a low payback period. It has been found that the upgrade to high-efficiency motors, as compared to motors that achieve the minimum efficiency can have paybacks of less than 15 months for 50 hp motors.