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TMS320F28377D: TIDM-HV-1PH-DCAC

huang bin
Prodigy 70 points

Part Number: TMS320F28377D
Other Parts Discussed in Thread: TIDM-HV-1PH-DCAC

Hi,TI

    Under the condition of Build3, the positive and negative amplitudes of the output AC are not equal uses the routine (TIDM-HV-1PH-DCAC voltage source inverter). But under the

condition of Build1, it is possible to output sinusoidal alternating current with equal positive and negative amplitudes. What causes it?output AC under build3

the left image illustrates the positive peak voltage reaches to 310V,but the negative peak only have 280V.

 

  • 0
    TI__Mastermind 43730 points

    The design uses closed loop control, any offset in the voltage sensing will show up as an error or unbalance.

    We do not do any board to board calibration. 

    you can see hv1phdcac_board.h has the following, you can adjust the 0.5f to 0.505f or 0.51f and see if that improves it. 

    (*VO_inst)= (((float32_t)(VAC_FB))*ADC_PU_SCALE_FACTOR - 0.5f)*2.0f;