Transcription of ELECTRONICALLY COMMUTATED MOTORS Part 2: Constant …
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ELECTRONICALLY COMMUTATED MOTORS Part 2: Constant …
Constant -AIRFLOW, VARIABLE-SPEED (OEM)INDOOR BLOWER ECMsTheconstant-airflow(variable-speed) ECM wasintroduced in 1987 by GE (rebranded Genteq in2009). It was the first and only indoor blower ECMuntil the introduction of the Constant -torque ECM in2006. The term variable-speed motor was coined inthe late 1980s. By function it is a Constant -airflowmotor. Both of these terms define the type or style of ECM and how it is programmed to MOTORS are built in 1 3-, 1 2-, 3 4-, and 1-hp sizes, and only in direct-drive MOTORS have gone through many generationalimprovements in their more than 20 years ofexistence, including advances in reliability andcommunication formats, as well as changes in theirphysical appearance.
8 o-clock positions, and a drip loop formed out of the wiring harness leaving the motor (see Figure 6). This prevents any moisture or water that may get into the motor area from running into the connectors, where it could cause damage to the control. In most systems, the OEM installs the motor in the correct position and provides the drip loop.
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