WANA (Sep 20) –  A full professor at Sharif University of Technology, with the support of the Iran National Science Foundation, has succeeded in designing the sensor required for high-speed electric trains.

 

The research project “Optimal Design and Construction of a Sinusoidal Variable Reluctance Resolver” was carried out by Zahra Nasiri Ghidari, a full professor at Sharif University, with support from the Iran National Science Foundation.

 

Nasiri Ghidari, who holds a PhD in the design and construction of electrical machines from the University of Tehran, explained about the project:

 

“Position sensors play a decisive role in the closed-loop control of electrical machines. Although advanced sensorless control methods in electrical machines also have many supporters, in many applications, sensor-based control is still preferred.”

 

She continued that “in rotary machines, the angular position, and in linear machines, the position along the axis, are important control parameters, for which many sensors have been introduced in industry. The most common of these sensors are optical encoders, differential transformers, Hall-effect sensors, and resolvers. In environments with high contamination, large temperature variations, and vibrations, resolvers are preferred.”

 

The researcher added: most studies conducted on resolvers have focused on rotary resolvers, and fewer studies have been done on linear resolvers. In this project, the goal was to present a new design for a linear variable reluctance resolver of the sinusoidal cross-section type.

 

Nasiri Ghidari concluded: wherever a linear motor exists, this sensor will be needed. However, given the focus of this project on high speed, high-speed electric trains are a suitable example for the application of this resolver.

High-Speed Electric Trains

High-Speed Electric Trains. Social media/ WANA News Agency