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    Pulse Width Modulation PWM technology

Mar 01, 2022 | Delta

Delta's DC fans technology continues to provide better performance, higher reliability and cost-effective thermal cooling solutions. 

Pulse-Width Modulation (PWM) is one of the primary reasons Delta fans have a clear advantage over other manufacturers.

PWM regulates the voltage signal between fully on and fully off. It controls the speed of the fan. The main advantage is that power loss in the switching device is very low. When a switch is off, there is practically no current, and when it is on, there is almost no voltage drop across the switch. Therefore, power loss is close to zero.

Delta carries a full lineup of PWM speed control fans with dimensions ranging from 36x36x28mm up to 280x280x80mm.


Benefits of Delta's Advance PWM Control


Delta's unique internal Advance PWM Controllers deliver a variety of advantages:

  • Advanced soft switching control (available on certain models)
  • Flexible speed control
  • Wide PWM frequency range input (30Hz - 30kHz)
  • Prevents current spikes
  • High power efficiency
  • Low switching noise
  • Low vibration
  • Extends the service life of the Motor
  • Available in Axial and Blower Models


PWM Fan Curve - Speed Characteristics with quiet operation

PWM Input Signal Wave Form

Delta Advance PWM Controlv

For more information, please call us 1-866-407-4278, or email: