1. An Energy-Efficient Motor Drive With Autonomous Power Regenerative Control SystemBased on Cascaded Multilevel Inverters and Segmented Energy Storage 研究生 : 吳叡霖 指導教授 : 龔應時 IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, VOL. 49, NO. 1, JANUARY/FEBRUARY 2013 Liming Liu, Senior Member, IEEE, Hui Li, Senior Member, IEEE, Seon-Hwan Hwang, Member, IEEE, and Jang-Mok Kim, Member, IEEE

2. Outline Abstract Introduction System Description -cascaded-multilevel-inverter-based motor drive with segmented energy storage -System Description -Proposed Power Distribution Strategy and Operation-Mode Analysis and Energy Storage Design -AUTONOMOUS POWER REGENERATIVE CONTROL SYSTEM -PWM method with phase shift control for two auxiliary inverters in each phase -Energy storage voltage balancing control -Simulation results -Experimental test bed -Speed and capacitor voltages with voltage balancing control -Speed and capacitor voltages without voltagebalancing control Conculsion References

3. Abstract  This paper presents a cascaded-multilevel-inverter-based motor drive system with integrated segmented energy storage.  the energy storage features not only implementing the harmonic compensation in all operating modes but also providing peak power during acceleration and absorbing regenerative power during deceleration  An autonomous power regenerative control system including voltage balancing control of segmented energy storage is developed to perform the smooth power transition between different operation modes and provide accurate speed tracking

4. Introduction  It is well known that energy storage devices are beneficial in a motor drive system to improve efficiency since they can recover the regenerated energy and provide peak power during transients.  Recently, cascaded multilevel inverters with single energy source and multiple capacitors as energy storage for motor drive applications have been reported, but capacitors in this research were only applied to provide harmonic cancellation. The distribution of real power between the energy source and the energy storage was not achieved, which limits the energy storage’s functions.

5. cascaded-multilevel-inverter-based motor drive with segmented energy storage

6. Proposed Power Distribution Strategy and Operation-Mode Analysis and Energy Storage Design

7. AUTONOMOUS POWER REGENERATIVE CONTROL SYSTEM

8. Energy storage voltage balancing control

9. Simulation results

10. Experimental test bed

11. Speed and capacitor voltages with voltage balancing control

12. Speed and capacitor voltages without voltage balancing control

13. CONCLUSION  In the proposed motor drive system, the energy storage has been designed not only to provide harmonic compensation but also to be capable of recovering regenerative energy during the deceleration mode and reapplying this energy during acceleration transients.  In this control system, the voltage balancing control of the energy storage has been demonstrated to be vital for power distribution, system stability, and reliability.

14. REFERENCES

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