The wide range of output frequency regulation method for the inverter using the combination of PWM and DDS. Issue 4 (1st July 2019)

• Record Type: Journal Article
• Authors: Pietrowski, Wojciech; Ludowicz, Wojciech; Wojciechowski, Rafal Marek
• Is Part Of: Compel. Volume 38:Issue 4(2019)
• Page Start: 1323
• Page End: 1333
• Publication Date: 2019-07-01
• Subjects: Wireless power transfer -- Power electronic devices modelling -- Inverter -- DDS modulation -- PWM modulation -- WREL system -- High frequency -- Pure sine inverter -- Look-Up Table -- STM32 -- Wireless Energy Transmission -- Signal processing; Electrical engineering -- Data Processing -- Periodicals; Electrical engineering -- Mathematics -- Periodicals; Electrical engineering -- Periodicals; Electronics -- Data Processing -- Periodicals; Electronics -- Mathematics -- Periodicals; 621.3
• DOI: 10.1108/COMPEL-10-2018-0402
• Languages: English
• ISSNs: 0332-1649

Abstract

Abstract : Purpose: The specific modulation methods are used to control different kind of single-phase, as well as three-phase, inverters to ensure flexibility and high quality of the output waveform. This paper aims to present a combination of two classical methods, namely, pulse width modulation method and direct digital synthesis modulation method. Design/methodology/approach: The total harmonic distortion of output waveforms of single-phase inverter based on elaborated modulation method has been determined by means of fast Fourier transform analysis. Tests have been carried out by using standard low-frequency application and also a wireless resonant energy link system. Findings: Applying appropriate timer parameters of microcontroller enables to obtain a waveform for given output parameters (amplitude, frequency, frequency modulation index, etc.). The only limitation is the computing power of a microcontroller. Originality/value: The elaborated method can be successfully used in both low- and high-frequency application ensuring high level of output waveform quality. Additional signal generators and the control of amplitude modulation ratio are no longer indispensable, what simplify immensely a control system.