Blog

Jan
21
By Nuno Fernando

Efficiency comparison between a 7.5 HP copper rotor motor and three permanent magnet motors suggests some interesting results

 

Setting the scene

For some time, permanent magnet motor manufacturers have been promoting their products with claims of superior efficiency beyond what is possible with a NEMA Premium induction squirrel cage motor. But is this comparison a fair “apples-to-apples” one to make? Or is it more like comparing apples with pears?

Sep
16
By Nuno Fernando

François Dovergne, Responsible for the Rotors Division at FAVI S.A., explains the company’s experience of manufacturing copper rotors and the new market opportunities.

 

Can you briefly introduce FAVI?

Sep
02
By Nuno Fernando

From 1 January 2017, energy efficiency class IE3 will apply to motors from 0.75 kW to 375 kW. This extends the situation in force since the start of 2015 when IE3 motors became mandatory for motors with a rated output between 7.5 kW and 375 kW. Hugh Falkner, Principal Consultant at Atkins Energy PLC, explains how copper rotors can ease the transition from IE2 to IE3.

 

What challenges might OEMs face when implementing the latest IE3 regulations?

May
20
By Nuno Fernando

Research underway in Germany could further accelerate market acceptance of copper rotor technology for asynchronous motors in a variety of applications

 

The general consensus is that a permanent magnet synchronous motor is more efficient than using a copper rotor in an asynchronous motor. But is such a statement based on a level playing field? Is it a fair comparison to make?

May
06
By Nuno Fernando

When it comes to providing the rotating machinery industry with copper, for example to fabricate copper motor rotors, one of the leading suppliers worldwide is Aurubis. Jo Rogiers, Business Line Manager Bars and Profiles, and Jan Janssen, R&D Director, describe the Aurubis portfolio for this industry sector.

 

Can you briefly introduce Aurubis?

Dec
13
By Nuno Fernando

Electric motors are widely used in many industrial applications, and the use of high efficiency motors allows significant energy savings to be made. This was the thinking that led to the three-phase induction motors classification scheme EC/640/2009. It introduced two efficiency levels: “high efficiency” IE2 and “premium efficiency” IE3 (the latter corresponding to the US “NEMA Premium”).

Oct
15
By Nuno Fernando

October 2014

The Super-efficient Equipment and Appliance Deployment (SEAD) initiative, an international collaboration of 16 countries and an initiative under the Clean Energy Ministerial, this week announced the winners of its Global Efficiency Medal competition for super energy-efficient electric motors. Because motors account for 40% of global electricity consumption, greater efficiency can provide significant opportunities for reducing energy consumption, carbon emissions and reliance on fossil fuels.

Oct
01
By Nuno Fernando

1st October 2014

What electrical steels are needed for copper rotors? How do you select the appropriate type? What do copper rotor manufacturers need to know when handling electrical steels? Sigrid Jacobs, Product Portfolio Director Electrical Steels at ArcelorMittal, provides some answers.

 

What’s so special about an electrical steel?

An electrical steel is a specialty steel designed to accomplish two main objectives.

Aug
18
By Nuno Fernando

2nd September 2014

Copper rotors are now being used in different branches of industry, especially for applications where high efficiency is required. Industrial applications include motors for high-speed machining centers, pumps, drills, compressors and fans. Transport applications include asynchronous motors for electric traction, starter-alternators, generators, and electric power-steering.