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April 2013

JMC Pulse Width Modulation Technology Offers Best In Class Electronics Cooling Fan Regulation


austin, tx – april 2, 2013jmc products, a worldwide leader in dc cooling fans and thermal solutions, gives you an in depth look at efficient fan speed-control with pulse width modulation (pwm).

summary

the most efficient method for cooling electronic products is to regulate the fan speed according to the temperature inside the electronic enclosure. pulse-width-modulation (pwm) fan-speed control is the best way to achieve this regulation because it can decrease energy consumption, improve fan reliability and reduce acoustic levels while providing wider operational speed bandwidth.

benefits

  • energy efficient because it doesn’t generate additional heat.
  • improved fan reliability because the fan doesn’t run at full speed all the time.
  • improved acoustics of the fan with high-frequency driving signals.
  • it provides thermal engineers with added operational speed bandwidth because the fan can run at either high or remarkably low speeds.

what is pwm?

pwm, or pulse width modulation, refers to the method of applying a square wave signal to a fan that will vary its speed by changing the signal duty cycle:


jmc_pwm_fan_control_931_01


an 80% duty cycle indicates that the fan is on 80% of the time and off 20% of the time. a 50% duty cycle signal indicates that the fan is on 50% of the time and off 50% of the time (similar to a perfect square waveform signal)

more info on pwm can be viewed here:

http://www.jmcproducts.com/wp-content/uploads/2013/03/jmcinforeleasepwm.pdf

 

about jmc products – jmc is a thermal solutions provider with headquarters located in the beautiful city of austin, texas. application development and customer support reside in the austin headquarters, while manufacturing occurs at jmc’s dong guan, china 60,000 square ft. facility. in addition, jmc has application centers in europe and taiwan. jmc sells its products to major original equipment manufacturers (oem) in europe, asia and the americas. jmc focuses on developing and innovating high performance, reliable air-moving devices that are utilized in consumer electronics, personal computers, networking, storage and server applications. our exceptional products and customer support insure our customers always stay cool. visit the jmc website at www.jmcproducts.com

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