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This Application Note shows how the capture/compare units of the C504, C508, C868,and C164CI can be used to implement space vector modulation for three-phase voltagecontrol inverter applications. Space vector modulation is widely considered to besuperior to other forms of sinusoidal PWM. A simple algorithm for overmodulation isalso demonstrated.1 Introduction..32 Sinusoidal Voltage Generation and Capture/Compare Units ...53 Methods of Generating Sinusoidal Voltages73.1 Sinusoidally Weighted PWM (SWPWM)73.2 Space Vector Modulation (SVM).93.3 Overmodulation ..174 Microcontroller Implementation of SVM .194.1 Variable Scaling/Resolution and Optimized Software Structure 204.2 SVM Implementation Options ...234.3 Results and Conclusions 24Appendix .28A SVM.a51...28B REGC504.inc .39C REGC508.inc .42
