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Upgraded premium drives promise improved reliability
Published:  06 March, 2012

The Finnish drive-maker Vacon has updated its NXP premium product range, making improvements to both the air-cooled and liquid-cooled versions in all ratings from 0.55kW–5.3MW.

“The Vacon NXP is a high-performance product range, and with this update we have further improved its performance, robustness and reliability,” says the company’s executive vice-president, Heikki Hiltunen. “We have done our homework and are focused on providing customers with the drive solutions they are asking for.”

One of the most significant improvements involves the control circuit boards, which have been redesigned and conformally coated, without changing their functions or compatibility. Some critical components have been replaced to increase their temperature sustainability.

Varnished cards and option boards are now provided as standard in power modules above 72A, offering improved protection against dust and moisture. Performance and durability have also been enhanced using improved cooling channels and optimising protection limits, based on Vacon`s experience.

In air-cooled versions of the drives, new fans improve reliability, thus ensuring longer lifetimes. The new cooling concept is said to improve fan efficiency by more than 50%.

In the liquid-cooled high-power modules, new options, such as integrated brake choppers, will minimise cabinet size and costs. “The processor in the control card has also been changed, boosting calculation power by 15%,” reports Kurt Hofman, Vacon’s product marketing director for liquid-cooled drives. “This benefits especially OEM customers who make their own software for applications.”
The enhanced Vacon NXP range has been tested extensively, and highly accelerated life tests have been carried out to assure product performance.

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