원문정보
초록
영어
Decoupling control of two-motor dual three-phase permanent-magnet synchronous motor (PMSM) series-connected system can be realized by using proper phase transposition rules with a single supply from a six-phase voltage source inverter (VSI), which solved the control problem of two motors in series. Since the traditional two-vector SVPWM strategy, which is commonly used in three-phase system, exists 5th and 7th harmonics in x-y plane, making it hard to realize decoupling control of two-motor dual three-phase PMSM series-connected system. Meanwhile, the DC bus voltage utilization of carrier-based PWM strategy is lower. Thus one method, which adopted a TBTSB-SVPWM strategy with two modulators, was proposed in this paper. It ensures the inverter output voltage only contains two kinds of fundamental components required by the two series-connected motors with a single VSI, making it possible to realize decoupling control of two-motor dual three-phase PMSM series-connected system. Simulation results indicate that there is no influence on the other motor while the speed/load of any one motor changed, achieving the decoupling control of series-connected system, and the feasibility and validness of the proposed approach are verified.
목차
1. Introduction
2. Series Control of Dual Three-Phase PMSM
2.1. Theoretical Analysis of Series-Connected system
2.2. Harmonics Influence
2.3. Control Strategy of Series-Connected System
3. SVPWM Technique of Series Connected System
3.1. Distribution of Basic Space Voltage Vectors
3.2. Synthesis of the Reference Voltage Vector
4. Simulation Verification
5. Conclusion
Acknowledgements
References