© 2006
GE ECM
by Regal-Beloit
- 7 -
Indoor Blower Motors
v0.2
Premium ECM Motor Operation
Specific airflow requirements for all demands are programmed into the motor control
and OEM control board. Motor provides airflow matched to the system and
maintains airflow within an acceptable external static pressure range.
Let’s first look at how the ECM motor is programmed to each OEM’s (Original
Equipment Manufacturer) specifications.
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In a series of tests by the OEM, (manufacturer of the HVAC system) the
motor is “taught” the relationship between speed, torque, airflow and external
static pressure.
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In these tests, or airflow characterization process, a development engineer
will adjust the ECM torque and chamber static pressure, and measure the
resulting ECM speed and airflow.
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These values over a wide range of static pressures and airflows are used in a
GE ECM supplied development program to create a set of blower constants
that are specific to each air mover (furnace/air handler).
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“Airflow” is programmed by the OEM and is specific and unique to the motor
and air mover combination.
No other motor offers so many ways to control comfort and efficiency.
