Pulse With Modulation
Pulse Width Modulation (PWM): A technology used to control the speed of motors, such as those in HVAC systems, by rapidly switching the power on and off. In HVAC systems, PWM is often associated with ECM (Electronically Commutated Motors). This method allows for precise control of fan speeds, enabling the system to adjust airflow as needed to maintain efficiency and protect equipment, such as compensating for restrictions like a dirty air filter. By fine-tuning motor performance, PWM helps improve energy efficiency and reduce operating costs.
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