Alternating-current phasor analysis method and modeling method for phase-shifting control dual active bridge direct-current converters
A DC converter, dual active bridge technology, applied in the direction of converting DC power input to DC power output, adjusting electrical variables, controlling/regulating systems, etc. Universal model, unclear physical meaning, etc., to achieve the effect of clear physical meaning, simplified calculation, and simple operation
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[0061] Below in conjunction with accompanying drawing and specific embodiment with figure 1 The shown dual active H-bridge DC converter topology is taken as an example to further illustrate the present invention.
[0062] image 3 Shown are three phase-shift control strategies: single phase-shift, extended phase-shift, double phase-shift control ideal waveform diagram; among them, V ab (t), V cd (t) is the AC side square wave voltage of two single-phase H-bridges, with the phase of the driving signal S1 as the reference phase, the phase delay between the driving signal S4 and S1 is called the inner phase angle α of H1 1 ; The phase delay between the driving signal Q1 and S1 is called the external phase angle α 2 ; The phase delay between the driving signal Q4 and S1, that is, the internal phase shift angle α of H2 4 and external phase angle α 2 The sum is called α 3 (α 3 = α 2 +α 4 ).
[0063] Taking H1 ahead of H2 as an example, three phase-shift control strategies ...
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