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US 11,098,967 B2Granted
Integrated fan drive system for cooling tower
AssigneePrime Datum, Inc.
InventorsPatrick M. Rollins, George Lucas
Life of this patent
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Abstract
A drive system for driving a fan in a wet cooling tower, wherein the fan has a fan hub and fan blades attached to the fan hub. The drive system has a high-torque, low speed permanent magnet motor having a motor casing, a stator and a rotatable shaft, wherein the rotatable shaft is configured for connection to the fan hub. The drive system includes a variable frequency drive device to generate electrical signals that effect rotation of the rotatable shaft of the motor in order to rotate the fan.
Claims19
A cooling tower system, comprising:
- a cooling tower structure;
- a variable speed direct-drive system supported by the cooling tower structure, the variable speed direct-drive system comprising a variable speed electric motor having a rotatable shaft, wherein the motor is configured to operate in a forward direction or a reverse direction, the direct-drive system further comprising a programmable motor controller comprising an input for receiving AC power and an output for providing quasi-sinusoidal electrical signals that control one or more of the following:
- the operational speed (RPM), torque and direction of rotation of the motor, the motor controller being further configured to receive feedback signals to adjust the speed and/or torque and/or direction of rotation of the motor;
- and
- a fan attached to the rotatable shaft of the motor such that the fan rotates upon rotation of the rotatable shaft.
2 more elements
Dependencies are inferred from the claim text.