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Seven-Level Single-Leg Flying Capacitor Converter Voltage Balancing Dynamics Analysis
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| Author(s) |
Boris REZNIKOV, Alex RUDERMAN |
| Abstract |
Time domain approach based on stitching analytical solutions for consecutive switching subintervalsis applied to analysis of seven-level single-leg flying capacitor converter natural voltage balancingdynamics for Phase Shifted PWM. Expressions for voltage balancing dynamics frequencies and timeconstants reveal dependences on load parameters, carrier frequency, and voltage command. The rootcause of poor (zero) natural voltage balancing damping phenomenon in odd-level single converterswith Phase Shifted PWM is explained by analyzing specific switching topologies. The remedy may bemodulation strategies that use different from classic Phase Shifted PWM switching states and providefaster natural balancing dynamics without compromising optimal voltage quality of nearest levelswitching, minimal integral switching loss and uniform switching loss sharing between converterswitches. In particular, the amount of employed zero voltage switching states must be increased. |
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| Filename: | 0295-epe2011-full-16014761.pdf |
| Filesize: | 206.2 KB |
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| Type |
Members Only |
| Date |
Last modified 2012-01-26 by System |
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