Open AccessCircuit for clamping bridge overvoltages in voltage‐fed quasi‐ Z ‐source converter
Author(s) -
Kitson J.,
McNeill N.
Publication year - 2016
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2015.4164
Subject(s) - voltage source , electrical engineering , negative impedance converter , buck–boost converter , output impedance , clamper , voltage , voltage spike , buck converter , engineering , current source , electrical impedance , commutation , power (physics) , electronic engineering , boost converter , physics , capacitor , quantum mechanics
Unlike the voltage source converter, the Z ‐source converter can boost as well as buck the input voltage. However, the presence of physically large components in the impedance network introduces large parasitic inductances into power device commutation paths. This leads to consequent overvoltages at power device turn‐off. A simple circuit for addressing this is presented. Practical results are given for a voltage‐fed quasi‐ Z ‐source inverter with discontinuous input current.