Title :
A three-level rectifier with reduced number of power switches based on one-cycle control
Author :
Tian, Kai ; Wang, Mingyan ; Liu, Chang ; Wei, Bing
Author_Institution :
Dept. of Electr. Eng., Harbin Inst. of Technol., Harbin
Abstract :
This paper presents a three-level rectifier with reduced number of power switches based on one-cycle control. Only six power switches with voltage rating of half DC-link are adopted in this multilevel rectifier. A nonlinear control method, one-cycle control, is used to control the rectifier. The controller is composed of some integrators with reset, flip-flops, comparators and linear components, which has the characteristics of simple, high precision. In addition, it works under constant switching frequency which is desirable for industrial applications. A neutral-point potential balancing method for the three-level rectifier based on one-cycle control is developed in this paper. Based on the proposed control strategy, the line currents are balanced and sinusoidal, and the neutral-point potential achieves balance. Simulation results are provided to verify the effectiveness of the proposed control strategy.
Keywords :
matrix algebra; nonlinear control systems; power semiconductor switches; rectifying circuits; comparators; constant switching frequency; flip-flops; half DC-link; multilevel rectifier; neutral-point potential balancing method; nonlinear control method; one-cycle control; power switches; three-level rectifier; voltage rating; Circuits; Cost function; Flip-flops; Instruction sets; Pulse width modulation; Rectifiers; Space vector pulse width modulation; Switches; Switching frequency; Voltage;
Conference_Titel :
Electrical Machines and Systems, 2008. ICEMS 2008. International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-3826-6
Electronic_ISBN :
978-7-5062-9221-4
