Parameter identification of ultrasonic motors
T. Schulte, N. Fröhleke, in: 1999 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (Cat. No.99), IEEE, 1999.

Knowledge based controller selection for electrical drives with imperfect mechanic
F. Schutte, S. Beineke, H. Grotstollen, in: IECON ’98. Proceedings of the 24th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.980), IEEE, 1998.

Modellierungund Regelung stromrichtergespeister Ultraschall-Wanderwellenmotoren
J. Maas, Modellierungund Regelung Stromrichtergespeister Ultraschall-Wanderwellenmotoren, 1998.

Identification of nonlinear two-mass systems for self-commissioning speed control of electrical drives
S. Beinke, H. Wertz, F. Schutte, H. Grotstollen, N. Fröhleke, in: IECON ’98. Proceedings of the 24th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.980), IEEE, 1998.

A high efficiency single-phase power factor corrected switched mode rectifier
P. Wallmeier, J. Richter, N. Fröhleke, H. Grotstollen, L. Langemeyer, B. Margaritis, in: IECON ’98. Proceedings of the 24th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.980), IEEE, 1998.

Improved analytical modeling of conductive losses in gapped high-frequency inductors
P. Wallmeier, N. Fröhleke, H. Grotstollen, in: Conference Record of 1998 IEEE Industry Applications Conference. Thirty-Third IAS Annual Meeting (Cat. No.982), IEEE, 1998.

Automated optimization of high frequency inductors
P. Wallmeier, N. Fröhleke, H. Grotstollen, in: IECON ’98. Proceedings of the 24th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.980), IEEE, 1998.

Investigation of low cost control schemes for a selected 3-level switched mode rectifier
P. Ide, N. Froehleke, H. Grotstollen, in: Proceedings of Power and Energy Systems in Converging Markets, IEEE, 1997.

Comparison of selected 3-phase switched mode rectifiers
P. Ide, N. Froehleke, H. Grotstollen, in: Proceedings of Power and Energy Systems in Converging Markets, IEEE, 1997.

Fast time-domain simulation by waveform relaxation methods
J. Sun, H. Grotstollen, in: PESC Record. 27th Annual IEEE Power Electronics Specialists Conference, IEEE, 1997.

Online identification of nonlinear mechanics using extended Kalman filters with basis function networks
S. Beineke, F. Schutte, H. Grotstollen, in: Proceedings of the IECON’97 23rd International Conference on Industrial Electronics, Control, and Instrumentation (Cat. No.976), IEEE, 1997.

Comparison of parameter identification schemes for self-commissioning drive control of nonlinear two-mass systems
S. Beineke, F. Schutte, H. Wertz, H. Grotstollen, in: IAS ’97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting, IEEE, 1997.

Averaged model of inverter-fed ultrasonic motors
J. Maas, H. Grotstollen, in: PES. Record 28th Annual IEEE Power Electronics Specialists Conference. Formerly Power Conditioning Specialists Conference 1970-71. Power Processing and Electronic Specialists Conference 1972, IEEE, 1997.

Online identification of mechanical parameters using extended Kalman filters
F. Schutte, S. Beineke, A. Rolfsmeier, H. Grotstollen, in: IAS ’97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting, IEEE, 1997.

Optimized drive control for inverter-fed ultrasonic motors
J. Maas, T. Schulte, H. Grotstollen, in: IAS ’97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting, IEEE, 1997.

Magnetic shielding applied to high-frequency inductors
P. Wallmeier, H. Grotstollen, in: IAS ’97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting, IEEE, 1997.

Simulation of power electronic circuits with principles used in wave digital filters
A. Fiedler, H. Grotstollen, in: IAS ’95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting, IEEE, 1997.

Application of Neural Networks for Control of Four-Quadrant Converters in Railway Propulsion Systems Applications of Neural Adaptive Control Technology
S. Scheffler, J. Böcker, in: Applications of Neural Adaptive Control Technology, World Scientific, 1997, pp. 281–302.

Ein automatisiertes Verfahren zur Off-line-Identifikation der elektrischen Parameter von pulswechselrichtergespeisten Asynchronmotoren
M. Ruff, Ein automatisiertes Verfahren zur Off-line-Identifikation der elektrischen Parameter von pulswechselrichtergespeisten Asynchronmotoren, 1997.

Beiträge zur Entwicklung von Gleichstromumrichtern mit geringer Ausgangsspannung
A. Fiedler, Beiträge zur Entwicklung von Gleichstromumrichtern mit geringer Ausgangsspannung, 1997.