In-Field Induction Motor Efficiency Determination Methods in the Scope of Efficiency-Based Maintenance
Authors: Oslinger, J. L.; Castrillón, R.
Event: Proceedings of the 6th International
Conference eemods '09: Energy Efficiency in Motor Driven Systems
Book: Memories 6th International Conference
eemods '09: Energy Efficiency in Motor Driven Systems, pp. 285-293, v.1.
Publication year: Nantes, France, 2009.
Keywords: Induction Motor, Efficiency,
Maintenance.
Abstract: Energy usage evaluation and operating
condition monitoring for electric machines are important issues in industry for
the implementation of energy saving strategies. There is a need for efficiency estimating
tools that can be used easily, but giving an appropriate level of confidence,
so that motors can be properly evaluated for replacement with more energy
efficient motors on the basis of a cost–benefit analysis. In addition, it is
important to diagnose motor conditions while measuring their efficiency, in
order to offer to the industry comprehensive motor-focused electric energy
management solutions in which, for example, data collection for evaluating
energy consumption versus production can be used, to be used in electric energy
management applied to motors.
Maintaining electrical and mechanical systems
within the industrial process environment continues to present a daunting
challenge. With electrical motors at the center of most processes, prognostics
are more effective if made during motor operation. However, since disruption of
the process is rarely possible, systems must often be de-energized during scheduled
outages before they can be maintained. Nonintrusive continuous monitoring of
critical systems is emerging as the best method to maximize reliability and
uptime with minimal impact on the plant process operation, since maintenance
can be scheduled, reducing downtime costs. This paper discusses the importance
of motor maintenance focused on efficiency for industrial process applications
and investigates a number of emerging technologies that enable this approach,
including online energy efficiency evaluation. An overview on the in-field
motor efficiency estimation methods is offered, being its importance evidenced.
The simplest, low-cost, in-field methods to indirectly estimate the motor efficiency
are briefly discussed.
