Title :
A centroid-based PWM switching technique for full-bridge inverter applications
Author :
Yazdian-Varjani, Ali ; Perera, Sarath ; Chicharo, Joe F.
Author_Institution :
Dept. of Electr. & Comput. Eng., Wollongong Univ., NSW, Australia
fDate :
1/1/1998 12:00:00 AM
Abstract :
A novel centroid-based pulse-width-modulation (PWM) switching strategy is proposed which is suitable for full-bridge inverter applications. This method is evaluated, and its performance is compared with existing PWM switching strategies. The performance evaluation and comparison are based on the total harmonic distortion (THD) and number of pulses per cycle of the inverter output waveform. The objective of the new switching strategy is to minimize both the THD and low-order harmonics. Simulation results show that this technique yields a significant improvement in performance. In addition, a hybrid switching sequence is developed for the proposed scheme, which can lead to further reduction in switching losses
Keywords :
PWM invertors; bridge circuits; harmonic distortion; losses; power system harmonics; switching circuits; THD; centroid-based PWM switching technique; full-bridge inverter applications; hybrid switching sequence; inverter output waveform; low-order harmonics; switching losses reduction; switching strategy; total harmonic distortion; Equations; Pulse inverters; Pulse width modulation; Pulse width modulation inverters; Sampling methods; Space vector pulse width modulation; Switching frequency; Switching loss; Total harmonic distortion; Voltage;
Journal_Title :
Power Electronics, IEEE Transactions on
