A microcontroller-based variable voltage variable frequency sinusoidal power source with a novel PWM generation strategy

The present paper describes the development of a low cost, microcontroller-based variable voltage variable frequency sinusoidal power source, which is the demand of the day for various applications. The power source is developed using MOSFET H-bridge inverter and with a stand alone LCD display system. The design methodology proposes to utilize a novel concept of generating sinusoidal pulse width modulation signals for the driver circuit of the inverter. The system proposes to incorporate a ROM-based LUT within the power source itself for the sinusoidal signal generation with enhanced stability. This low cost, yet accurate power source has been successfully developed for wide range of voltage commands (30–80 V rms) and frequency commands (40–70 Hz), and their real-life performances in voltage wave generation were also found to be quite satisfactory.

[1]  Nasrudin Abd Rahim,et al.  Three-phase three-level voltage source inverter with low switching frequency based on the two-level inverter topology , 2007 .

[2]  Kay Soon Low.  A DSP-based variable AC power source , 1998, IEEE Trans. Instrum. Meas..

[3]  I. Flegar,et al.  Power electronics circuits , 1996 .

[4]  J.B. Vieira,et al.  Programmable AC power source used to analyze electronic equipment performance in the electrical power system quality concept , 2008, 2008 Twenty-Third Annual IEEE Applied Power Electronics Conference and Exposition.

[5]  Radu Mihnea Udrea,et al.  Quantized multiple sinusoids signal estimation algorithm , 2008 .

[6]  Tore Undeland,et al.  Power Electronics: Converters, Applications and Design , 1989 .

[7]  Khaled A. Madi Ali,et al.  Microcontroller Based Variable Frequency Power Inverter , 2010 .

[8]  Simona Halunga,et al.  Single sine wave parameters estimation method based on four equally spaced samples , 2011 .

[9]  Robert W. Erickson,et al.  Fundamentals of Power Electronics , 2001 .

[10]  Daniel W. Hart,et al.  Power Electronics , 2010 .

[11]  Dragos Nicolae Vizireanu,et al.  A simple and precise real-time four point single sinusoid signals instantaneous frequency estimation method for portable DSP based instrumentation , 2011 .

[12]  K. Al-Haddad,et al.  A variable frequency soft commutated voltage source inverter delivering sinusoidal waveforms , 1990, Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting.