Arnold Magnetic Technologies Non Grain Oriented (NGOES) Electrical Steel is optimized by thickness and finish to meet your most demanding needs for high speed, high efficiency motors and high efficiency transformer applications. When optimally applied, NGOES offers reduced eddy currents which translate into energy savings.
SMALLER, LIGHTER, MORE EFFICIENT MOTORS AND GENERATORS
Arnold’s Non Grain Oriented Electrical Steel (NGOES) is manufactured in thicknesses of 0.004″, 0.005″ and 0.007″ (0.102mm, 0.127 mm and 0.178 mm) under the trade names Arnon™ 4, Arnon™ 5 and Arnon™ 7. Typical NGOES electrical steel laminations use 0.0118″ to 0.0185″ (0.30 mm to 0.47 mm) thicknesses.
Arnon™ silicon steel is frequently used as laminations in high speed, high efficiency motors and generators. Whereas common laminations use 0.014″ to 0.032″ (0.356 mm to 0.813 mm) thicknesses, Arnon 5 and Arnon 7 are thinner at 0.004″, 0.005″ and 0.007″ (0.102mm, 0.127 mm and 0.178 mm) respectively. The laminations are located in either the rotor or the stator depending on whether the laminated structure is used in a rotating or stationary design. The laminations are generally made from NGOES since they are circular and the magnetic properties are equal in all directions.
By using thinner laminations, your high speed motor and/or generator can achieve a higher level of performance through improved efficiency.
Arnon electrical steel has shown to be particularly advantageous for higher frequency motors and generators above 400 Hz. In these designs, the thinner material offsets the less efficient effects of increased eddy currents and subsequent heat buildup. Using thin laminations of Arnon produces a more efficient unit and frees up design constraints by allowing for fully enclosing the motor without external cooling, for example. Arnon laminations have proven to be the industry leader at switching frequencies above 1K Hz.
Arnon has the ability to lower core loss by as much as 50% compared to other NGOES materials. Some motors using Arnon have been tested to exceed 98% efficiency.
Thin gauge Arnon provides efficiency improvements at higher frequencies above 400 Hz with exponential efficiency gains as the frequency increases.
- Arnon is usable at higher frequencies than cobalt-iron (Hiperco 50) materials. Co-Fe materials are not recommended for applications over 1200 Hz whereas Arnon Si-Fe is the preferred material to at least 10 KHz.
- Low coercivity coupled with the hysteresis curve shape of Arnon provides reduced hysteresis loss in rotating machinery, yielding a more efficient motor or generator with less heat buildup and better performance (e.g. improved torque density) and/or the ability to maintain constant RPM’S under load.
- Arnon exhibits up to 50% lower core loss than competitive non-oriented silicon steel when driven by the same field, confirming Arnon’s lower coercivity and improved hysteresis curve shape.
- Low loss Arnon is especially useful in totally enclosed motor designs where heat cannot be easily removed.
- Arnon is significantly less expensive than Co-Fe (Hiperco 50) – about 1/3 its cost.
Our Arnon non grain oriented electrical steel (NGOES/CRNO) and grain oriented electrical steel (GOES/CRGO) materials meet IEC 60404-8-8.