Zetex, Inc.
Hauppauge, NY 11788
May 16, 2002 ZXBM2000 series of ICs controls 2-phase, dc brushless fan and blower motors up to 100W. ZXBM2003 provides frequency generator rotor speed output; ZXBM2002 offers locked rotor error output; and ZXBM2M001 combines both signals on dual function pin. All deliver up to 80 mA to pair of external MOSFET or bipolar transistors connected to fan motor windings. Speed control is implemented via variable external voltage or NTC thermistor input.

Denison Hydraulics Inc.
Marysville, OH 43040
Apr 24, 2002 Hydraulically powered fan drive cools engines used in construction, transportation, railroad, power generation, and similar industries. Replacing mechanically coupled fan drive with hydraulic version permits fan to be operated at optimum speed over entire duty cycle, consuming only as much power as is needed to accomplish task. Controller monitors inputs from temperature sensors in cooling loops and adjusts fan speed to keep all systems within limits.

ABB Industrial Power Products
New Berlin, WI 53151 2840
Feb 01, 2002 Side-by-Side electronic bypass/drive fits into air-handling units and pumping packages, making it suitable for single-motor HVAC fan and pump applications. Bypass/drive signals damper to open and waits until it receives confirmation that damper is fully open, before allowing motor operation. Drive is available in plenum-rated NEMA 1 or NEMA 12 enclosure. Windows(R) tool facilitates set-up, commissioning, and maintenance of drive and bypass.

Quest Controls, Inc.
Palmetto, FL 34221-4802
Nov 26, 2001 TELSEC™ 500 extends heat exchanger fan and battery life in remote site cabinet for wireline and wireless telecom industries. It provides variable speed control of up to six heat exchanger fans, lets fan motors run at minimum speed necessary to maintain tight and stable temperature control within cabinet, and monitors and sends alarms to telecom alarm and/or maintenance center through dry contact closures.