Signal Converter with Three-Phase and Quadrature Outputs for Driving Synchros and Resolvers

ABSTRACT

Design and measurement results of the signal converter with three-phase and quadrature outputs are presented in this paper. Input to the converter is a sinusoidal reference signal and the outputs are the quadrature and symmetrical three-phase sinusoidal signals of the same frequency as the reference. The output amplitudes are proportional to the reference amplitude. The quadrature output is generated in the novel phase-shift controlled all-pass filter, while the three-phase outputs are generated from the quadrature and reference signals in the electronic implementation of the Scott-T transformer. The converter is of all-analog design and is intended for driving receiver (Rx) type synchros and resolvers during testing and students hands-on laboratory experiments in the frequency range 50 Hz–5 kHz.

KEYWORDS:

• Controlled all-pass filter
• Quadrature signals
• Resolver
• Signal converter
• Three-phase signals
• Scott-T transformer
• Synchro

Additional information

Notes on contributors

Darko Vyroubal

Darko Vyroubal received the BS, MS and PhD degrees in electronic instrumentation from the University of Zagreb, Croatia in 1970, 1974 and 1985, respectively. He was employed in the industry from 1970 till 1998. Since 1998 he is with the Karlovac University of Applied Sciences, Karlovac, Croatia as a professor. His research interest is in sensors and electronic instrumentation applied to power machinery. He is the author of over 30 papers, reports and presentations.

Vedran Vyroubal

Vedran Vyroubal received the BS and MS degrees in electronic engineering from the University of Zagreb, Croatia in 2002 and 2011, respectively. He is currently pursuing PhD degree in electronic engineering at the University of Zagreb, Croatia. He was employed in the industry from 2002 till 2012. Since 2012 he is with the Karlovac University of Applied Sciences, Karlovac, Croatia as a lecturer. His research interest is in the internet of things, multi-agent systems and sensor fusion. He is the author of 5 papers in these fields. Email: [email protected]

Damjan Belavić

Damjan Belavić received the BS degree in mechatronic engineering from the University of Applied Sciences in Karlovac, Croatia in 2017. Since 2015 he is with the Končar-Inem, Zagreb, Croatia. His current interest is in industrial automation. Email: [email protected]

Zoran Halić

Zoran Halić received the BS degree in mechatronic engineering from the University of Applied Sciences in Karlovac, Croatia in 2014. Since 2014 he is with the Rimac-Automobili, Sveta Nedelja, Croatia. His current interest is in electronic systems in high performance electric car. Email: [email protected]