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Joachim Holtz talks with ScienceWatch.com and answers a few questions about this month's Emerging Research Front Paper in the field of Engineering. The author has also sent along an image of his work.
Holtz Article: Sensorless control of induction machines - With or without signal injection?
Authors: Holtz, J
Journal: IEEE TRANS IND ELECTRON, 53 (1): 7-30 FEB 2006
Addresses: Univ Wuppertal, Elect Machines & Dr Grp, D-42097 Wuppertal, Germany.
Univ Wuppertal, Elect Machines & Dr Grp, D-42097 Wuppertal, Germany.

Why do you think your paper is highly cited?

Figure 1:  
Holtz
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It introduces novel solutions to a topic of current research, and combines this with an in-depth, state-of-the-art analysis. I know from many inquiries that the subject is of interest both to industries and academic researchers.

Does it describe a new discovery, methodology, or synthesis of knowledge?

It describes a new methodology and provides a synthesis of knowledge.

Would you summarize the significance of your paper in layman's terms?

Theory tells us that an induction motor is not observable when operating at a low speed of rotation. This means that control of the motor speed is not possible without using a speed sensor. The new method overcomes this obstacle using a trick. Eliminating a speed sensor leads to cheaper and more reliable motor drives.

How did you become involved in this research and were any particular problems encountered along the way?

Research is one of my obligations as a university professor. I become aware of any unsolved problems in my capacity as an industrial consultant.

Do you foresee any social or political implications for your research?

I expect few social or political implications as a result of this research.

Professor Joachim Holtz
Head of the Electrical Machines and Drives Laboratory
University of Wuppertal
Wuppertal, Germany


Figure 1:

Holtz

KEYWORDS: ADAPTIVE TUNING; IDENTIFICATION; INDUCTION MOTOR; MODELING; OBSERVERS; SENSORLESS POSITION CONTROL; SENSORLESS SPEED CONTROL; SIGNAL INJECTION; VECTOR CONTROL.

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2009 : April 2009 - Emerging Research Fronts : Joachim Holtz
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