Ac-dc-ac power converter;
drive system;
parallel converter;
PREDICTIVE CURRENT CONTROL;
VOLTAGE-SOURCE INVERTERS;
ACTIVE-POWER-FILTER;
CIRCULATING CURRENT;
SWITCHING LOSSES;
CONVERTER SYSTEM;
CONTROL STRATEGY;
PWM CONVERTERS;
SPEED DRIVES;
MOTOR-DRIVES;
D O I:
10.1109/TPEL.2009.2037420
中图分类号:
TM [电工技术];
TN [电子技术、通信技术];
学科分类号:
0808 ;
0809 ;
摘要:
This paper proposes a single-phase to three-phase drive system composed of two parallel single-phase rectifiers, a three-phase inverter, and an induction motor. The proposed topology permits to reduce the rectifier switch currents, the harmonic distortion at the input converter side, and presents improvements on the fault tolerance characteristics. Even with the increase in the number of switches, the total energy loss of the proposed system may be lower than that of a conventional one. The model of the system is derived, and it is shown that the reduction of circulating current is an important objective in the system design. A suitable control strategy, including the pulsewidth modulation technique (PWM), is developed. Experimental results are presented as well.