Applied Electronics and Electrical Engineering

Teaching in Bachelor Programmes

• Experimental Methods in German: Experimentelle Methoden (seit SS 2023)
• Basic Electrical Engineering in German: Elektrotechnik 1 (seit SS-2015)
• System Analysis and Simulation in German: Systemanalyse und Simulation [SS 2020 - SS 2024]
• Selected Topics in Mechatronics in German: Vertiefung Mechatronik (WS 2016/2017 - SS2017)
• Electrical Drives for Bachelor Programmes in German: Elektrische Antriebe (seit SS 2016)
• Calculus 1 in German: Analysis 1 (seit WS 2015/2016)
• Mathematics for Engineers II in German: Mathematik für Ingenieure II (SS-2015)
• Signals and Systems in German: Signale und Systeme
• Projects in Cooprative KIS-Programs
• Bachelor Thesis with Colloquium (CVH-034)

Teaching in Master Degree Programmes

• Electric Drives (Master of Science in Mechatronics) starts from SS-2027
• Control of Electric Drives (Master of Science in Mechatronics) starts from WS-2027/28
• Stochastic Signals in German language Master Program (now phasing out) (since WS-2015/2016)
• Applied Statistical Signal Processing in German language Master Program (now phasing out) [since WS 2020/2021]
• Labor- und Industrieprojekt (MA-CVH-6)
• Lab Project in German language Master Program (now phasing out) Entwicklungsprojekt (MA-CVH-16)
• Master Thesis with Colloquium

Aktualisiert am 21.4.2026

Major topics covered in this module:

• Review of essential concepts of electromechanical systems 
• Asynchronous and synchronous machines in electric drives
• Selected drive concepts

Learning outcomes / competences

The students have a substantial knowledge of the fundamental concepts of electromechanical systems, that they can apply to understand the operation and analyse the static and dynamic behaviour of electric machines needed to develop and evaluate drive system solutions to be deployed in industrial and traction applications. 

Applying the concepts and methods learnt in this module, they are proficient in selecting the appropriate motors in order to devise and design solutions for electric drive system.

Ovierview of topics: 

• Common electric drive system structures
• Common methods of speed and position control
• Drive inverters and their modulation techniques

Learning outcomes / competences 

The students can analyse and develop drive control systems based on the dynamic behaviour of the electric machines, mechanical components and inverters. 

They can apply the commonly used control methods including field-oriented control learnt in the module to analyse and develop solutions for industrial and traction applications of appropriate complexity.

This is a bachelor modul. Info Available in German only.

This is a Module offered in German for Bachelor Programme students . Info available in German only.

This is a Module offered in German for Bachelor Program students . Info available in German only.

Exercise Sheets and Lecture Slide sets are available only in German.

I am providing those materials to the students. The slides are designed for in-person lectures and may not be suitable for self-study. There are many excellent textbooks available for the covered material, which I highly recommend. See the German page for details!

Tentative Course Schedule – Summer Semester 2026

Please come to every exercise session with your solutions or at least attempted solutions. This is the only way the exercises function optimally and the only way you will make progress.

Weeks 1 to 7: Fundamentals of DC Circuits and Network Analysis

• Introduction to the basic terminology of electrical engineering
• Ohm's Law, resistance and resistors, energy and power
• Real current and voltage sources, maximum power transfer theorem, Kirchhoff's laws
• Current and voltage dividers, star-delta transformation, bridge circuits, etc.
• Methods of network analysis
• Non-linear networks

Weeks 8 to 11: Electric Fields

• Description and calculation of electric fields
• Dielectrics and capacitors
• Energy of the electric field

Weeks 12 to 15: Magnetic Fields

• Description and calculation of magnetic fields
• Magnetic circuits
• Electromagnetic induction

This is a Module offered in German for Bachelor Program students . Info available in German only.

This module is an integral component of the phasing-out Master's programme. Information Available in German only.

This elective module is offered in the winter semester if there are enough participants. During the semester the participants will find below the material to be shown in the  lecture rooms. This material will be provided without any claim of depth, breadth or accuracy.

The students will be required to take part in the activities such as discussions, maunal and computer aided problem solving and simulation experiments. A good familiarity with Matlab will be expected.

The lecture and the lecture materials will be in German.

Slides part1

Slides part 2

Problem set 1 to be solved manually

Computer based and manualy solvable problems set No. 2

blackboard picture

Slides part 3 (not complete yet)

Data für Matlab Übung Nr. 5

Information available in German only.

The course is offered before the official start of the Winter Semester. The information is avaiable in German only.

This course was offered during WS 2016/2017 and SS 2017 as part of the now restructured Bachelor's program. Course language was German.

Applied Control Engineering

Control and Regulation of Internal Combustion Engines

Stochastic Signal Processing

Medical and Technical Applications of Ultrasound Imaging

Peer Reviewed Papers and conference papers

• Ashfaq M. and Ermert H.: A unified transmission/reflection acoustic tomography scheme for small animal tissue characterization, 2007 IEEE International Ultrasonic Symposium Proceedings, pp. 877-880, 2007.
• Ashfaq M. and Ermert H.: An analysis of the refraction artifacts in time-of-flight tomography regarding their impact on image definition and contrast resolution, 2007 IEEE International Ultrasonic Symposium Proceedings, pp.1804-1807, 2007.
• Ashfaq M. and Ermert H.: A combined transmission and echo tomography system for small animal imaging, Annual Meeting of The German Society of Biomedical Engineering, Session G2: Ultrasound Contrast Agents and Molecular Imaging, published on CD, 2007.
• Siebers S., Scheipers U., Ashfaq M., Hänsler J., Frieser M., Strobel D., Hahn E. and Ermert H.: Sonographic Monitoring of the Radiofrequency Ablation-First Clinical Results. In German: Sonographisches Monitoring der Radiofrequenzablation-Erste klinische Ergebnisse, Annual Meeting of The German Society of Biomedical Engineering, Session G3: Ultrasound Imaging, published on CD, 2007.
• Hansen Chr., Schasse A., Hüttebräuker N., Ashfaq M., Wilkening W. and Ermert H.: Reconstruction of Speed of Sound for a Correction of Transit Time in Full Angle Spatial Compounding, 2007 IEEE International Ultrasonic Symposium Proceedings, pp. 785-788, 2007.
• Hansen Ch, Hüttebräuker N, Wilkening W, Ashfaq M, Ermert H: 3D Reconstruction of Sub-Millimeter Vessels by means of Ultrasound Contrast Enhanced Spatial Compounding: In-vitro Analyses. Proceedings: 21st International Congress and Exhibition of Computer Assisted Radiology and Surgery (CARS 2007), Berlin, Germany, In: Int J Comput Assist Radiol Surg, Vol 2, Suppl 1, pp S35-S37, 2007
• Hansen Ch, Hüttebräuker N, Wilkening W, Ashfaq M and Ermert H: Ultrasonographic Contrast Agent Imaging of Sub-Millimeter Vessel Structures with Spatial Compounding: In-vitro Analyses. Biomed Tech (Berl), Vol 52, No 4, pp 274-283, 2007
• Ashfaq M., Hansen Ch., Hüttebräuker N. and Ermert H.: A Quantitative Analysis of the Refraction Artifacts in Echo Tomography and Comparison of Different Corrective Techniques. Biomed Tech, Proceedings: Joint Annual Meeting of German, Austrian and Swiss Societies for Biomedical Engineering, Zurich, Published on CD: v82:1-2, 2006.
• Ashfaq M., Hansen Ch., Hüttebräuker N. and Ermert H.: A Quantitative Study of the Time Delay Correction for Full Angle Spatial Compounding. 2006 IEEE International Ultrasonics Symposium Proceedings, pp. 2156-2159, 2006.
• Brunke S., Insana M.F., Dahl J.J., Hansen Ch., Ashfaq M. and Ermert H.: An Ultrasound Research Interface for a Clinical System. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, Vol. 53, No. 10, pp. 1759-1771, 2006.
• Hansen Ch., Hüttebräuker N., Ashfaq M., Wilkening W. and Ermert H.: Contrast Enhanced Perfusion Imaging by means of Spatial Compounding. 2006 IEEE International Ultrasonics Symposium Proceedings, pp. 424-427, 2006.
• Hansen Ch., Hüttebräuker N., Ashfaq M., Wilkening W. and Ermert H.: Ultrasonographic Spatial Compounding for Contrast Agent Imaging. Biomed Tech, Joint Annual Meeting of German, Austrian and Swiss Societies for Biomedical Engineering, Zurich, v78:1-2, 2006.
• Siebers S., Scheipers U., Ashfaq M., Hänsler J., Frieser M., Strobel D., Hahn E. and Ermert H.: In Vivo Imaging of Cougulated Tissue. 2006 IEEE Ultrasonics Symposium Proceedings, pp. 1762-1765, 2006.
• Ashfaq M. and Ermert H.: An eikonal equation based scheme for refraction artifacts compensation in time-of-flight tomography. 2005 IEEE Ultrasonics Symposium Proceedings, pp. 2034-2037, 2005.
• Ashfaq M., Hüttebräuker N., Hansen, Ch., Wilkening, W. and Ermert, H.: Spatial Compounding with Tissue Harmonic Images and Monostatic Synthetic Aperture Reconstruction. 2005 IEEE Ultrasonics Symposium Proceedings, pp. 1220-1223, 2005.
• Ashfaq M. and Ermert H.: Utilitizing a Commercial Ultrasound System fort he quantitative reconstruction of acoustic parameter for breast imaging. Biomed Tech 49, pp. 633-634, 2005.
• Scheipers U., Siebers S., Ashfaq M., Gottwald F., Bozzato A., Zenk J., Iro H. and Ermert H.: Ultrasonic Tissue Characterization for the Differentiation of Parotid Gland Tumors. 2005 IEEE Ultrasonics Symposium Proceedings, pp. 827-830, 2005.
• Scheipers U., Siebers S., Gottwald F., Ashfaq M., Bozzato A., Zenk J., Iro H. and Ermert H.: Sonohistology for the computerized differentiation of parotid gland tumors. Ultrasound in Medicine and Biology, Vol. 31, No. 10, pp.1287-1296, 2005.
• Ashfaq M. and Ermert H.: A new approach towards ultrasonic transmission tomography with a standard ultrasound system. 2004 IEEE Ultrasonics Symposium Proceedings, pp. 1848-1851, 2004.
• Ashfaq M., Mienkina M. and Ermert H.: Estimation of time of flight for ultrasonic reflex-transmission tomography with active contour modells. 2004 IEEE Ultrasonics Symposium Proceedings, pp. 1433-1436, 2004.
• Ashfaq M., Mienkina M.P. and Ermert H.: Application of deformable Contour Models in the Ultrasound Transmission Tomographie. Published in German: Einsatz deformierbarer Konturmodelle in der Ultraschalltransmissionstomographie. Biomed Tech, Vol. 49 (Suppl. 2, Pt. 2), pp. 890-891, 2004.
• Ashfaq M. and Ermert H.: Ultrasound Spiral Computed Tomography for Differential Diagnosis of Breast Tumors using a Conventional Ultrasound System. Acoustical Imaging 27 (Arnold, W., ed.), Kluwer Academic / Plenum Publisher, New York, pp. 627-633, 2003.
• Ashfaq M. and Ermert H.: Ultrasound Spiral Computed Tomography for Differential Diagnosis of Female Breast: Some Phantom Results. Fortschritte der Akustik - DAGA 2002, Bochum, Vol. 28, pp. 679-680, 2002.
• Ashfaq M. and Ermert H.: Ultrasound Spiral CT for the female breast: first phantom imaging results. Biomed Tech, Vol. 46, Suppl., pp. 70-71, 2001.
• Ali A., Ashfaq M. and Schmid Chr.: Model Reference Adaptive Control of Nonlinear Systems Using LLM Networks. Proc. American Control Conference, 1659-1663, 2000.
• Weber W., Ortmann M. and Ashfaq M.: Simulation Results of Transient Processes in the Dynamics of human blood sugar regulation. Published in German: Simulationsergebnisse transienter Vorgänge in der Dynamik der menschlischen Blutzuckerregulation, Facta Universitatis (Niš), Yugoslavia, Electronics and Energetics 12(3):1-10, 1999

Patent pending

• Mohammad Ashfaq, Karsten Hiltawsky und Helmut Ermert, Verfahren und Applikator für die Spiral-Computer-Tomographie mit Ultraschall in der Medizin, Offenlegungsschrift: DE10137186A1 und EP1281354A2.

Selected Conference Presentations

• A unified transmission/reflection acoustic tomography scheme for small animal tissue characterization, at the IEEE International Ultrasonic Symposium held in New York in 2007.
• An analysis of the refraction artifacts in time-of-flight tomography regarding their impact on image definition and contrast resolution, at the IEEE International Ultrasonic Symposium held in New York in 2007.
• A Quantitative Study of the Time Delay Correction for Full Angle Spatial Compounding, at: the IEEE International Ultrasonics Symposium held in Vancouver, BC, Canada in 2006.
• A Quantitative Analysis of the Refraction Artifacts in Echo Tomography and Comparison of Different Corrective Techniques, at the joint annual meeting of German, Austrian and Swiss Societies of Biomedical Engineering held in Zurich, Switzerland in 2006
• An eikonal equation based scheme for refraction artifacts compensation in time-of-flight tomography, at: the IEEE International Ultrasonics Symposium held in Rotterdam, Holland, in 2005.
• Spatial Compounding with Tissue Harmonic Images and Monostatic Synthetic Apature Reconstruction, at: the IEEE International Ultrasonics Symposium held in Rotterdam, Holland, in 2005.
• A new approach towards ultrasonic transmission tomography with a standard ultrasound system, at: the IEEE International Ultrasonics Symposium held in Montreal, Canada, in 2004.
• Estimation of time of flight for ultrasonic reflex-transmission tomography with active contour models, at: the IEEE International Ultrasonics Symposium held in Montreal, Canada, in 2004.