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PWM to Analog signal to drive VFD

Many VFD require Analog signal for speed control.

Our interface (Arduino for example) produces PWM signal.
It requires an external circuit to convert the signal to 0-10V analog signal.

DIY circuits
Here a circuit from @yobuddy

Here a circuit from @speedy
Speedy AC coupler.jpg


An updated PCI Opto-Coupler Shield that can be used for the
SMC3 Arduino 3DOF Motor Driver and Windows Utilities
can be found here ...​
Opto-Coupler + Arduino UNO.JPG 20170126_020732.jpg

20170127_021007.jpg Opto-Coupler wireing connections.jpg

On the shell
PWM 0-10V Digital to Analog Signal Tranformer Converter Module MACH3 PLC New
on eBay @ 6€
  • PWM digital signals into analog signals from 0 to 10V.
  • Convert PWM digital signal into 0 to 10 v analog signals.
  • Power Input Range: 12V-30V (Power requirements: more than 100MA)
  • Signal interface switch can be used for PLC or other industrial control board.
  • PWM Reception frequency range: 1 KHZ - 3 KHZ.
  • Current output capacity: 10MA.
  • Resolution: 0.1V.
  • Usage: by adjusting the potentiometer board, can match the calibration of PWM signals of different frequency pulse
by RacingMat
speedy likes this.
VFD's and 3phase motors
Oct 20, 2015
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