Integrated fan drive system for air-cooled heat exchanger (ACHE)
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United States of America Patent
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May 29, 2012
Issued Date -
N/A
app pub date -
Mar 16, 2009
filing date -
Mar 24, 2008
priority date (Note) -
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Abstract
An integrated fan drive system for air-cooled heat exchangers. The integrated fan drive system has a high-torque, low speed permanent magnet motor having a rotatable shaft, a fan that is directly connected to the rotatable shaft, and a variable frequency drive device in electrical signal communication with the permanent magnet motor to control the rotational speed of the permanent magnet motor. The high-torque, permanent magnet motor comprises no more than two bearings in operative association with the shaft. The variable frequency drive device has a variable frequency controller that has an input for receiving AC power and an output for providing electrical signals that control the operational speed of high-torque, permanent magnet motor. The variable frequency drive device also includes a user interface in electronic data signal communication with the variable frequency controller to allow a user to input motor speed control data. Other embodiments of the invention are described herein.
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