Patent ID: 6368064
Filing Date: 2002-04-09
Classification: F04D,Y02B

Abstract:
An apparatus for providing redundant power and redundant fan speed control to a plurality of fans comprising:a first power supply input electrically connected to a second power supply input to provide a combined power supply input, a first and a second speed controller each having an input and an output, a first and a second power converter each having an input and a output, the combined power supply input electrically connected to the input of the first fan speed controller and the input of the first power converter, the combined power supply input electrically connected to the input of the second fan speed controller and the input of the second power converter, the output of the first fan speed controller electrically combined with the output of the second fan speed controller to provide a combined fan speed control signal, the combined fan speed control signal electrically connected to the plurality of fans, the output of the first power converter electrically combined with the output of the second power converter to provide a combined fan voltage, the combined fan voltage electrically connected to the plurality of fans.