The global site of the UK's leading magazine for automation, motion engineering and power transmission
5 December, 2020

Product and Supplier Search

Facebook

Novel coil-winding technique cuts losses by up to 25%

04 March, 2020

The German wound components manufacturer REO has developed a more efficient way of winding coils that, it claims, can cut power losses by up to 25%. It also results in components such as chokes and transformers that are smaller and up to 10% lighter than conventional designs.

Air gaps that form in the spaces between windings of coils can occupy to 9% of the space, and these gaps are up to 24 times less electrically active than the copper.

The new edge-winding technique produces coils with lower skin effect and proximity losses than traditional winding techniques. The edge-wound coils also exhibit lower parasitic capacitance than other methods of winding, reducing unwanted high-frequency return paths, and helping to ensure electromagnetic compatibility (EMC).

The single-layered structure of the edge-wound coils allows heat to be dissipated more efficiently, which is particularly useful in applications requiring water-cooling or likely to operate under high levels of mechanical and thermal stress.

“Not only does the new technique offer REO products greater heat dissipation and lower losses,” says Steve Hughes, managing director of REO's operation in the UK. “It also allows us to optimise each product to meet the technical and budgetary requirements of customers. The improved cooling makes it feasible to use aluminium and copper conductors, providing more flexibility in meeting technical demands.”

REO’s edge-winding technology results in wound components with much lower losses than normal

REO is continuing to develop the edge-winding technology. At present, the technique is best suited to products carrying currents of 50–250A. The company is working on new combinations of windings that will allow this to be raised in the future.




Magazine
  • To view a digital copy of the latest issue of Drives & Controls, click here.

    To visit the digital library of past issues, click here

    To subscribe to the magazine, click here

     

Exhibition

Drives Show 2022The next Drives & Controls Exhibition and Conference will take place in Birmingham, UK, from 5-7 April, 2022. For more information on the event, visit the Show Web site

Poll

"Do you think that robots create or destroy jobs?"

Newsletter
Newsletter

Events

Most Read Articles