A Simple Circuit to Visualize Space Vectors by an Oscilloscope

Abstract

The paper presents a simple circuit for analog computation of space vector components on the basis of phase voltages. The space vector trajectory could be directly visualized by an oscilloscope. Proposed circuit consists of nine resistors only. An algorithm to compute the resistor values and programs that support the design are provided. The method is experimentally verified using a three-phase voltage source inverter model. Three methods to visualize recorded data are proposed, each capturing different aspect of the space vector trajectory.