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Overview of ECM Technology (.pdf)
What is ECM technology? ECM (Electronically Commutated Motor) technology is based on a brushless DC permanent magnet design that is inherently more efficient than the shaded-pole and permanent-split-capacitor (PSC) motors commonly found in air handlers, furnaces, heat pumps, air conditioners
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Bidirectional VF Control of Single and 3-Phase Induction Motors Using the PIC16F72
Single-phase induction motors are extensively used in appliances and industrial controls. The Permanent Split Capacitor (PSC) single-phase induction motor is the simplest and most widely used motor of this type. By design, PSC motors are unidirectional, which means they are designed to rotate
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Controlling Airflow in Class II Biosafety Cabinets (.pdf)
. To that end, a direct current (DC) electronically commutated motor (ECM) was installed in place of the conventional alternating current (AC) permanent split capacitor (PSC) motor.
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Green Innovations (.pdf)
used AC Permanent-. Split-Capacitor (AC PSC) motor. Fan Motor Efficiency. Noise. AC PSC. DC ECM. DC. AC 3-Phase. DC Motor. .80. Airflow (Design). N/C. N/C. N/C. N/C. DC ECM Motor. .70. AC 3-Phase. Fan (RPM). 1100-1700 800-1400. 1400-2200. 800-1400. y. .60. Motor (Harmonics). Yes. No. No. No. .50. f
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Green Technology: More-Efficient Motors
Motors. This is a brushless- dc unit designed to power the water pump on a hot tub. The 1.8-hp, 230-V motor runs a 2-hp pump at speeds down to 400 rpm as well as in jet mode for to 64% fewer watts than the standard permanent split-capacitor induction motor it replaces, The savings can be about 100 W
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AC Motors
motors are split-phase, capacitor-start, permanent split-capacitor, and shaded pole. The motors come in multispeed types, but there is a practical limit to the number of speeds obtained. Two, three, and four-speed motors are available, and speed selection may be accomplished by consequent-pole
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Wash this way
completing the spin. The second CPU also controls a permanent split-capacitor motor that drives the bidirectional, regenerative pump. A serial bus is used to communicate between the two CPUs. Two pressure switches are in the washer, one for the automatic water-level control and a second switch
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"Hotrodding" AC Capacitor Motors and Gearmotors ...At your own Risk
by replacing factory specified capacitors with larger ones. But pushing the motor too far beyond design specs is risky. Here’s how capacitance affects motor performance. Overview. Permanent Split Capacitor (PSC) Motors, Bodine Electric Company. Capacitors for permanent-split-capacitor (PSC