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Edward Lowton
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Synchronous motor starter hub
24 July 2018
When a utility company based in Saudi Arabia experienced operational problems with the starting hub of a critical synchronous motor drive, the company initially approached the motor OEM for assistance. On learning the existing 35year old hub was considered ‘obsolete’ they found no support was forthcoming. Seeking a viable alternative, Quartzelec, the independent engineering service provider as an expert in rotating electrical machines, was approached to provide technical support.
Rather than simply looking to fabricate replacements for the hub components that had failed and ‘nursing’ others that were becoming increasingly unreliable, Quartzelec proposed developing and fitting an ‘all-new’ external starting hub – Quartzelec’s Rosenberry Hub; a cost effective solution for synchronous motor starting and often used in machine life extension programmes.
Upon detailed on-site investigation it was discovered that the in-situ vertical motor had no suitable endofshaft location for a conventional Rosenberry Hub. Unwilling to admit defeat, Quartzelec rose to the challenge of designing and reengineering its original hub design, ultimately developing a totally new solution to fit around the shaft – creating the first ever Split Rosenberry Hub.
Upon detailed on-site investigation it was discovered that the in-situ vertical motor had no suitable endofshaft location for a conventional Rosenberry Hub. Unwilling to admit defeat, Quartzelec rose to the challenge of designing and reengineering its original hub design, ultimately developing a totally new solution to fit around the shaft – creating the first ever Split Rosenberry Hub.
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