Air cooling of medium voltage drive components

Details Air cooling of medium voltage drive components Air cooling of medium voltage drive components

2010-05-28

2011-12-06

Thompson, Gregory (Department: 2835)

Electricity: electrical systems and devices

Housing or mounting assemblies with diverse electrical...

For electronic systems and devices

C415S126000, C454S184000

Reexamination Certificate

active

08072756

ABSTRACT:
A parallel redundant fan system includes at least first and second fans located adjacent each other. Each fan includes: (i) a fan housing defining a fan chamber in which an impeller is supported for rotation about an axis of rotation; (ii) a first chamber outlet in communication with the fan chamber and defined by an opening in a first wall of the fan housing; (iii) a second chamber outlet in communication with the fan chamber and defined by an opening in a second wall of the fan housing; and, (iii) first and second backflow prevention dampers respectively associated with the first and second chamber outlets. The first and second dampers respectively include first and second damper plates that selectively pivot from their closed positions toward their opened positions against the closing force of respective first and second counterweights in response to exhaust air flow pressure exerted thereon.

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