Proposal of a Wound-Rotor PCB-Resolver
Saeed Hajmohammadi, Zahra Nasiri‐Gheidari
Abstract
Winding configuration and its accurate practical implementation are the main factors of building a resolver as an accurate position sensor. Facilitating the winding process and removing the possibility of mistakes during the resolver's manufacturing are interesting topics for industrial applications. In this article, an innovative printed circuit board (PCB) winding is proposed for the axial flux wound rotor (WR) resolver. Both the stator and the rotor have PCB windings and only the stator has a slotless, thin back iron. The developed sensor benefits from high accuracy, small size, almost zero amplitude error, negligible null voltage, ability to work in stationary and dynamic applications with a wide rotational speed range, easy manufacturing process and low manufacturing cost. The design aspects of the proposed resolver are presented comprehensively and a hybrid model is proposed for its performance evaluation. Finally, a prototype of the sensor is built and tested to approve the success of the proposed design and accuracy improvement. The average of absolute position error of the prototype is equal to 0.041° in 6 kr/min.