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AMC1300: Noise reduction in AMC1300

Rajasekaran
Intellectual 945 points
Part Number: AMC1300


Dear sir,

We are trying to measure the AMC1300 for inverter output voltage measurement. Please find the below attached screenshot for the circuit. 

PWM Carrier frequency : 17240Hz

Reference sine waveform frequency : 50Hz. 

Load resistive load 

We are getting lots of noise in the inverter bridge output. Please find the attached screenshot. 

SPWM carrier frequency : 17240Hz, Reference sine : 1Hz, Y axis scale : 10V / div, X axis scale : 50uS

SPWM carrier frequency : 17240Hz, Reference sine : 1Hz, Y axis scale : 500mV / div, X axis scale : 50uS

SPWM carrier frequency : 17240Hz, Reference sine : 10Hz, Y axis scale : 10V / div, X axis scale : 50uS

SPWM carrier frequency : 17240Hz, Reference sine : 50Hz, Y axis scale : 10V / div, X axis scale : 50uS

Could you please suggest the suitable filter (hardware component or use software filter after data acquisition) to get the output waveform without noise. 

Thanks & regards,

Rajasekaran

  • 0
    TI__Guru 55542 points

    Hi Rajasekaran,

    You may want to consider adding a differential cap between OUTH and OUTL after the resistor to form a differential RC filter, but that is all I can suggest. If you have specific questions about the AMC1300 I am happy to help.