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Date: 2.28.07
Title: Rosenberg Unveils Electronically Commutated (EC) Fans |
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CHARLOTTE, NC – Rosenberg is introducing a family of compact, radial fans with
free-running impellers and variable speeds that combine electronically
commutated external rotor motors with newly developed integrated power
electronics.
Designated by model numbers
GKHR and GKHM, the new fans’ long-life, low-temperature brushless DC
motors are controlled by maintenance-free electronic circuitry. GKHR
fans are motorized impellers, mounted and balanced, that may be provided
with or without an inlet cone. GKHM fans are complete fan modules.
The fans’ external rotor design and high power density make
them ideal for use in ventilation and air conditioning applications.
With reduced mechanical content, the fan motors run cooler and quieter,
require little or no maintenance and can be speed-controlled using an
external potentiometer or 0-10V PWM signal.
Unlike conventional DC motors, the new Rosenberg EC motors deliver
highly efficient, low-noise performance without using collectors and
carbon brushes that wear out and shorten motor life. Also in the new
models, both the power supply and control leads connect directly at the
motor, simplifying installation.
In
pressure control applications, the EC motors can be direct connected to a
pressure sensor. In master-slave designs, the pressure controlled
output of the master fan controls slave unit speeds. Networking is easy
by linking fan motor electronics to a computer using an RS485 interface.
The Rosenberg family of companies
employs more than 900 individuals in Germany, France and the U.S.
Rosenberg USA is headquartered just outside Charlotte in Indian Trail,
N.C. For more information, or to place an order, contact Rosenberg USA
by phone at (704) 893-0883; fax (704) 882-0755 or e-mail sales@rosenbergusa.com.
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