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The carrier-based PWM for voltage balance of flying capacitor inverter
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| Author(s) |
S-G. Lee; D-W. Kang; Y-H. Lee; D-S. Hyun |
| Abstract |
This paper proposes a new solution by carrier-based PWM method to solve the most serious problem of flying capacitor multi-level inverter that is the unbalance of capacitor voltages. The voltage unbalance occurs due to the difference of each capacitor's charging and discharging time applied to Flying Capacitor Inverter. New solution controls the variation of capacitor voltages into the mean '0' during some period by means of new carriers using the leg voltage redundancy in the flying capacitor inverter. The solution can be easily expanded to the multi-level inverter. Also, this method can make the switching loss and conduction loss of device equal by the use of leg voltage redundancy. First, this paper will examine the unbalance of capacitor voltage and the conventional theory of self-balance using phase-shifted carrier. And then the new method that is suitable to the flying capacitor inverter will be explained. The simulation results would be shown to verify the proposed method. |
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| Filename: | EPE2001 - PP00583 - Lee.pdf |
| Filesize: | 116.9 KB |
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| Type |
Members Only |
| Date |
Last modified 2004-03-11 by System |
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