Multichannel Step Up Power Converter With Magnetically Uncoupled Filters

Analytical and Comparative Study of Different Types of Two-Leg Chopping Up Regulator

“…The average value of discontinuous smoother current within the region of discontinuity is obtained in [1] as:…”

“…This advantage results in the use of smaller inductive smoothers on the output of the regulator in order to meet the same requirements for the total current ripple. Therefore, the distortion in the output voltage can also be improved due to smaller output coils, resulting in using a smaller capacitance at the output [1][2]. Inserting an additional inductance, L s in series with the source V s , will result into the following expressions and graphs for the peak-to-peak ripple of the source and phase currents for ≤ ≤ 2 ⁄ as follows:…”

“…On the other side, when both switches are off, both currents will decrease exponentially into the two individual legs of the regulator. Therefore, there will be no need for controllers to distribute the currents equally into both individual legs as in the case of connection with smoothing inductive smoothers without magnetic coupling [1,14].…”

“…Concerning the coil, it is necessary to design its winding with respect to the maximum rms value of the smoother current, that can flow through it. After rearrangement we can get [1]:…”

“…A chopping up regulator directly changes from dc to dc and like an ac transformer, it is used to step up or step down a dc voltage source value. Due to its capability to deliver smoothly adjustable dc voltage, dc chopper ups have revolutionized the regime industrial control devices and frequency inverters with unidirectional and with power levels extending from fractional horsepower up to several megawatts [1,2].…”