Dual relationships between voltage-source and current-source three-phase inverters and its applications

Dual relationships between voltage-source and current-source three-phase inverters and its applications are presented in this paper. Although the original circuits are nonplanar, it is shown in this paper that the output and input equivalent circuits of these two types of inverters are planar. By using the dual relationships between these two types of inverters, it is shown that PWM pattern generation techniques and analysis methods that have been developed for voltage-source inverters can also be applied to the current-source ones. A control method for current-source resonant DC link inverters is developed based on the duality with the voltage-source ones. Simulated and experimental results on a current-source resonant DC link inverter are included to verify the practicability of the duality concept.