The design of a tri-state CSI using only an additional semiconductor switch for introducing unique freewheeling states to the traditional six active and three null states of a CSI. With the freewheeling states inserted appropriately within the inverter state sequence, the
inductive boosting and discharging intervals can be decoupled, allowing the RHP zero to be eliminated with only minor circuit modifications (high level control schemes like predictive and multiloop voltage/current control remain unchanged).
T Vijay Muni (2020). Tri-State Current Source Inverter With Improved Dynamic Perf (https://www.mathworks.com/matlabcentral/fileexchange/79361-tri-state-current-source-inverter-with-improved-dynamic-perf), MATLAB Central File Exchange. Retrieved .
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