Inverter Bridge-3 Phase

Category: Toolbox > eDrives > Inverters

Inputs:

•      Vdc: DC bus voltage.

•      EN[l,2,3]: Enable pins for three phases.

•      Duty[1,2,3](0..1): Duty cycles for three phases.

•      Iout[1,2,3]: The output (load) current (A) fed back into the three-phase inverter bridge model.

Outputs:

•      Vout[1,2,3]: Three-phase line-to-neutral output voltage.

•      Vout[12,23,31]: Three-phase line-to-line output voltage.

•      lin: The DC input current (A) of the model.

•      v_lsense[1,2,3]: Three-phase output of the voltages dropped across the internal current sense resistors.

Description: The Inverter Bridge-3 Phase block is an average model of a three-phase inverter bridge. This block includes the current sensing resistors measuring the switch currents. The voltage drop is not modeled.

Note: Typically the controller outputs are modulation indices (m) , not the duty cycle (d) and the relationship between these two variables is defined as %FontSize=10 %TeXFontSize=10 \documentclass{article} \usepackage{amsmath} \pagestyle{empty} \begin{document} $ d=\frac{m+1}{2} $ \end{document}.

Graphical user interface, text, application Description automatically generated

Current Sense Resistance (mOhm): Specifies the resistance value of the three-phase current sensing resistors. The output at v_Isense will then be Iout*Rsense for each of the three phases.