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By combining the technologies of the field proven and power dense AC laminated frame RPM AC motor with high performance permanent magnet (PM) salient pole rotor designs and the matched performance of an adjustable speed drive, Baldor Electric can offer high torque direct drive motors for cooling tower applications with all the benefits of variable speed control and eliminating the cost and maintenance required for traditional gearbox or belted solutions.

Features and Benefits of Cooling Tower Motor and Drive System

Direct Drive Motor

• Eliminates the need for a gearbox, jack shaft, pillow block bearings and couplings

• Reduces maintenance and provides improved reliability

• Eliminates cooling water contamination by eliminating gearbox oil and leakage

• Reduces power consumption

• Results in increased safety because there are fewer mechanical components

• Water-tight motor design operates in the air stream

• Eliminates the alignment of mechanical components for quicker installation and reduced installation costs

Bearings and Seals

• Oversized to maintain longer bearing life exceeding L-10 100,000 hours

• Grease lubricated for long life

• Handles fan loads with improved reliability

• Proven Inpro/Seal® bearing isolator with slinger umbrella over seal

• Only one ingress point

Adjustable Speed Control

• Designed specifically for the Cooling Tower Industry and can be set at the optimum speed point

• Sensorless Permanent Magnet motor control operates without an encoder or resolver

• Trickle heating eliminates need for motor space heaters

• No tuning is required due to the Matched Performance of the motor and control

• Allows for a soft start (controlled ramp)

• Saves energy and reduces mechanical stress on the system

• Improves system reliability and extends life

• Reduces noise

• Allows for optimized return water cooling temperature for optimized compressor operation

• Trickle current for braking prevents fan windmilling when not in operation

• System resonance speeds can be bypassed

Communication Protocols

• Utilizes MODBUS-RTU, MODBUS/TCP, EtherNet/IP, LonWorks, Metasys-N2, BACnet, DeviceNet or PROFIBUS protocols

• Interfaces with existing building automation systems