Need Help! PWM circuits

Results 1 to 3 of 3

Thread: PWM circuits

  1. #1
    Registered
    Join Date
    Jan 2009
    Location
    serbija
    Posts
    32
    Downloads
    1
    Uploads
    0

    Default PWM circuits

    Does anyone have an idea how to make a circuit between the two devices as in the picture?
    I have a PWM source which operates from 0 -2.5-5v and analog devices to the entrance between the input and GND has 5V and then output either 10V when you connect a short input and GNG have + 10v
    2.5v = 0V
    at the exit of how to do to merge these two assembly
    greeting

    Similar Threads:
    Attached Thumbnails Attached Thumbnails PWM  circuits-pwm-t0-0-5v-jpg  


  2. #2
    Registered vegipete's Avatar
    Join Date
    Mar 2006
    Location
    Sol 3 (YVR)
    Posts
    202
    Downloads
    0
    Uploads
    0

    Default Re: PWM circuits

    Some filtering turns the PWM into an analog value. Then one (or a few) op-amps can amplify, invert and offset the 0 to 5 volts to 10 to -10 volts.

    The trick though is getting a sensible output when the input is not running. If the PWM is off, what should the output voltage be, considering safe operation?



  3. #3
    Member
    Join Date
    Feb 2007
    Location
    canada
    Posts
    942
    Downloads
    0
    Uploads
    0

    Default Re: PWM circuits

    Yes , you can use a simple RC filer on the pwm then a differential opamp to offset and double the voltage

    Quote Originally Posted by vegipete View Post
    Some filtering turns the PWM into an analog value. Then one (or a few) op-amps can amplify, invert and offset the 0 to 5 volts to 10 to -10 volts.

    The trick though is getting a sensible output when the input is not running. If the PWM is off, what should the output voltage be, considering safe operation?
    You have the PIC output a delayed enable to the amplifier to only turn it on when its stable. Thats what i do on my step2linear

    Manufacturer of CNC routers and Viper Servo Drives
    www.LarkenCNC.com and www.Viperservo.com


  4. #4
    Rachelye1's Avatar
    Join Date
    Aug 2019
    Posts
    1
    Downloads
    0
    Uploads
    0

    Default

    In addition to monitoring the output state of the power circuit, PWM (Pulse Width Modulation) circuit also provides power component control signals, so it is widely used in various high-power circuits such as switching power, motor Inverter, audio for V D-polar amplifier, DC-DC converter, and UPS.



Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


About CNCzone.com

    We are the largest and most active discussion forum for manufacturing industry. The site is 100% free to join and use, so join today!

Follow us on


Our Brands

PWM  circuits

PWM  circuits

PWM  circuits