Stability and robustness analysis of d/dt-closed-loop IGBT gate drive

Closed-loop IGBT switching trajectory control by means of an active IGBT gate drive (AGD) ensures an operation of the IGBT in the SOA and enables the minimization of switching delays, switching losses and EMI. In this paper the closed-loop control of diC/dt and dvCE/dt by the use of an AGD is investigated on the basis of control-oriented small signal IGBT modeling and the analysis of IGBT module parasitics. Therewith, analytical stability considerations are carried out employing root-locus plots. Furthermore, the transfer functions for different closed-loop controlled IGBT modules are analyzed in dependency of their parameter variations and parasitic inductances. A closed-loop AGD prototype is used to experimentally test, verify and comparatively evaluate the switching behavior of the different considered IGBT modules.

[1]  Patrick R. Palmer,et al.  Circuit analysis of active mode parasitic oscillations in IGBT modules , 2003 .

[2]  Karsten Fink.  Untersuchung neuartiger Konzepte zur geregelten Ansteuerung von IGBTs , 2010 .

[3]  P.R. Palmer,et al.  Design of the active voltage controller for series IGBTs , 2004, 2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551).

[4]  Y. Wang,et al.  An analysis of high power IGBT switching under cascade active voltage control , 2005, Fourtieth IAS Annual Meeting. Conference Record of the 2005 Industry Applications Conference, 2005..

[5]  Fang Zheng Peng,et al.  Intelligent gate drive for high power mosfets and igbts , 2008 .

[6]  P. Hofer,et al.  Gate-control strategies for snubberless operation of series connected IGBTs , 1996, PESC Record. 27th Annual IEEE Power Electronics Specialists Conference.

[7]  Patrick R. Palmer,et al.  Analysis of IGBT modules connected in series , 1998 .

[8]  Fang Z. Peng,et al.  Closed-Loop Gate Drive for High Power IGBTs , 2009, 2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition.

[9]  T. Jahns,et al.  Flexible dv/dt and di/dt control method for insulated gate power switches , 2001, Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248).

[10]  S. Norrga,et al.  Active Snubber Circuit for Source Commutated Converters Utilizing the IGBT in the Linear Region , 2007, IEEE Transactions on Power Electronics.

[11]  J. W. Kolar,et al.  Closed-loop IGBT gate drive featuring highly dynamic di/dt and dv/dt control , 2012, 2012 IEEE Energy Conversion Congress and Exposition (ECCE).

[12]  Baoming Ge,et al.  Modeling and analysis of closed-loop gate drive , 2010, 2010 Twenty-Fifth Annual IEEE Applied Power Electronics Conference and Exposition (APEC).