Abstract
This paper presents a novel modulation scheme known as the nonzero staircase modulation scheme for switching DC-DC boost converters. This modulation scheme generates two distinct pulse trains/firing signals when a 50 Hz nonzero staircase modulating signal is compared with a 1.5 kHz triangular wave signal. Unlike the conventional modulation schemes, the proposed novel modulation scheme provides two distinctive trains of pulse-width modulated signals for mitigating low and high harmonics. It also possesses 0.56% total harmonic distortions (THD) of the output voltage waveform system, a power output of 4591 W, and THD of 1.12% in the DC-DC boost converter system. It has a simple design and low power loss of 209 W. The proposed scheme enables the single switch boost DC-DC converter used to have an efficiency of 96%. The proposed scheme can be applied in single switch or double switch boost DC-DC converter based-hospital equipment.
Highlights
Computation of Heights of Nonstaircase ModulatingHaving computed h1, h2, h3, h4, h5, h6, h7, h8, h9, and h10 of the nonzero staircase modulation scheme, we obtain h11, h12, h13, h14, h15, h16, h17, h18, h19, and h20 as the mirror images of h1, h2, h3, h4, h5, h6, h7, h8, h9, and h10
Introduction e DCDC boost converter is a power electronic converter that is placed most especially between a low unregulated voltage power source and a load
Its input voltage sources could be obtained from solar power supplies, rectified AC voltage supplies, battery, fuel cells, biomass, and supercapacitors [3]
Summary
Having computed h1, h2, h3, h4, h5, h6, h7, h8, h9, and h10 of the nonzero staircase modulation scheme, we obtain h11, h12, h13, h14, h15, h16, h17, h18, h19, and h20 as the mirror images of h1, h2, h3, h4, h5, h6, h7, h8, h9, and h10. E values of the storage elements L and C of the DC-DC boost converter are computed using equations (8) and (9) as given in [2]. Cmin, Vo, and R are the minimum capacitance, minimum inductance, output voltage, and output load resistance of the converter
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