15V 3A dc motor PWM frequency

Discussion in 'General Electronics Chat' started by sean900911, Mar 1, 2013.

  1. sean900911

    Thread Starter Member

    Jan 28, 2013
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    0
    What is the suitable frequency for 15 V dc motor? Is there any effect on the motor and the frequency is changing ? I am confuse with this until now and internet show a lot of theory that confuse me~ Please help me .. Thank you...
     
  2. shortbus

    AAC Fanatic!

    Sep 30, 2009
    4,015
    1,531
    Frequency for motor PWM is usually 18kHz to 20kHz range. To keep at high audio range that most people can't hear.
     
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  3. sean900911

    Thread Starter Member

    Jan 28, 2013
    35
    0
    Why it is usually keep in 18kHz to 20kHz range ? Just to reduce noise pollution only? Thank you.
     
  4. THE_RB

    AAC Fanatic!

    Feb 11, 2008
    5,435
    1,305
    If it's a traction motor or needed to drive a high load at low RPM you should use a low freq PWM, generally 400Hz or so.
     
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