Title :
Harmonic analysis of two PWM waveforms in asynchronous modulation
Author :
Blaabjerg, Frede ; Longchun, Chen ; Pedersen, John K.
Author_Institution :
Inst. of Energy Technol., Aalborg Univ., Denmark
Abstract :
In this paper two PWM waveforms are compared by theoretical analysis and by measurements. The two PWM waveforms are space vector modulation and third harmonic injection which are both used in the asynchronous modulation mode of an inverter. The theoretical analysis is based upon a decomposition technique of the generated waveform to obtain its spectrum. The experimental analysis is performed on a simple and reliable microcontroller-based 5 kVA inverter. It is concluded that the third harmonic injected modulation has a cleaner spectra than the space vector modulation both by theory and by measurements. The decomposition technique shows also a close agreement to FFT measurements
Keywords :
harmonics; invertors; pulse width modulation; 5 kVA; PWM waveforms; asynchronous modulation; decomposition technique; inverter; space vector modulation; spectrum; third harmonic injection; Application software; Energy measurement; Harmonic analysis; Harmonic distortion; Microcontrollers; Performance analysis; Pulse width modulation; Pulse width modulation inverters; Space technology; Voltage;
Conference_Titel :
Industrial Electronics, 1992., Proceedings of the IEEE International Symposium on
Conference_Location :
Xian
Print_ISBN :
0-7803-0042-4
DOI :
10.1109/ISIE.1992.279694
