Transcription of ELECTRONICALLY COMMUTATED MOTORS Part 1: History …
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ELECTRONICALLY COMMUTATED MOTORS Part 1: History …
OVERVIEW OF ECM TECHNOLOGYE lectronically COMMUTATED motor(ECM) technologyhas been in use for over 20 years in the HVACR industry. Predominantly used in variable-speedindoor blower MOTORS , ECMs were introduced in 1987 by GE (rebranded Genteq in 2009). Theseinnovative MOTORS provide improved efficiency, aswell as programming and comfort options not possiblewith PSC induction MOTORS . However, they are stillwidely misunderstood, misapplied, and is ECM technology? ECM technology is basedon a brushless dc (direct current) permanent magnetdesign that is inherently more efficient than the ac(alternating current) shaded-pole and permanentsplit-capacitor (PSC) MOTORS commonly found in airhandlers, furnaces, heat pumps, air conditioners, andrefrigeration applications throughout the HVACR industry.
efficiency of the ECM and also to its sensorless ability to control the rpm (revolutions per minute) and commutation (when to alternate the cycle). Typical dc motors require brushes to provide the commutation function. This is why the ECM is described …
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