3 phase generator

It is a computer based adjustable frequency and amplitude three-phase sinus waveform generator. The generator is the "brain" of electro motors test bench. Output signal of the device is connected to 3 channels power amplifier. Amplified signal drives 3 phase electro motor.

Below you can find information only about generator because it was my target.

Main features of the generator:

• Device is powered from computer USB interface or from extrernal 5V power supply
  
• Output signal waveform: Sinus
  
• Frequency range: 1...2000 Hz
  
• Frequency changing step: 1 Hz
  
• Output amplitude: 0...2 V [p-p]
  
• Amount of steps for changing output amplitude: 1000
  
• Angle between phases: 120°
  

See the block diagram and PCB of generator below:

Generator consists of these general parts:

• Microcontroller ATMEGA16
  
• 4 channels parallel DAC AD7305
  
• Low pass filters on OP TLC072
  
• Connection to PC via chip FT232
  

See below the screenshot of application for generator control: