Not all power applied to an electric motor is converted to work. Principal sources of energy waste include winding loss (I2R), windage, friction, stray load loss and loss in stator, rotor and armature cores. Studies have shown that depending on load, core loss is the first or second leading cause of energy waste in rewound motors, and can account for 25% or more of motor inefficiency.

core_loss_testing_motorWhat is Core Loss?

“Core Loss is a Waster of Energy and Destroyer of Motors”

A significant percentage of motors have core loss exceeding statistical acceptability.  Moreover, government efficiency mandates make detecting sources of energy loss increasingly important.

The critical importance of core testing has been acknowledged by preeminent technical authorities, such as the Engineering Committee of the Electrical Apparatus Service Association (EASA). EASA’s Guidelines for Maintaining Motor Efficiency During Rebuilding require motor repairers to “Conduct a stator core test before and after stripping

[the winding].” Core Testing reveals repairable problems. Testing before stripping avoids wasting time and money on a core which should be replaced, and verifies that stripping did not damage the core.

Why Test for Core Loss?

Core Loss Testing provides a quick and efficient method for determining core losses found in the core steel of stators, rotors, and armatures. Applied Dynamics recognizes that core loss is a significant cause of wasted electrical energy that may be caused by overheating during operation or during winding burnout, as well as from physical damage. Core loss is second only to copper loss in motor windings as a cause of motor inefficiency. Core loss testing is the only method of determining if a motor is capable of operating at rated efficiency after rebuilding.

To discover all the benefits of choosing Applied Dynamics for Core Loss Testing, or to receive a custom quote for our other services, please contact us directly today. Servicing New York, Connecticut, Massachusetts, New Hampshire, Vermont, Maine and Rhode Island.