Title :
Carrier phase-shifted discontinuous PWM algorithm for cascaded H-bridge inverters
Author :
Qiu, Changqing ; Huang, Shenghua
Author_Institution :
State Key Lab. of Adv. Electromagn. Eng. & Technol., Huazhong Univ. of Sci. & Technol., Wuhan, China
Abstract :
Previous work has shown many general space vector PWM algorithms for cascaded H-bridge inverters. To keep the load balance of switches for cascaded H-bridge inverters, complex pulse cycle control must be added to the algorithms. This paper presents carrier phase-shifted discontinuous PWM (CPS-DPWM) algorithm which can keep load balance of switches automatically. More importantly, switching frequency is reduced up to 2/3 of the previous. Simulation results are given for the verification of CPS-DPWM algorithm.
Keywords :
PWM invertors; load (electric); switches; switching convertors; CPS-DPWM algorithm; PWM inverters; carrier phase shifted discontinuous algorithm; cascaded H-bridge inverters; load balance; pulse cycle control; switches; Frequency modulation; Inverters; Pulse width modulation; Switches; Switching loss; Vectors;
Conference_Titel :
Electrical Machines and Systems (ICEMS), 2011 International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4577-1044-5
DOI :
10.1109/ICEMS.2011.6073562
