Today, torque, speed, and position control systems are considered an inseparable part of most mechanical processes. All these controllers need to be aware of the rotary axis’s current position for better performance. This necessity, which arises from the theoretical infrastructure of the aforementioned systems, is answered by sensors. Although sensorless systems have also been proposed to meet this need, they’ve been replaced by position sensors in well-established servomechanism factories, practically and economically due to the slow dynamics of these systems. Many different methods are used for positioning, including capacitor, piezoelectric, resistive, electrostatic, optical, magnetic, and sonar, which have specific applications based on their structure and function. Sensors with appropriate structures and also sufficient accuracy in industrial applications; are noteworthy. Encoders and resolvers are the most commonly used position sensors among various existing sensors. This paper presents the structure of the variable reluctance resolver in positioning with a rotary motion and then reviews its performance using finite element simulation. As a part of the review, the accuracy of the sensor has been eva‎luated using signal processing methods. The parameters affecting the performance of resolvers are the number of poles and the type of winding. Therefore, the performance of the resolver has been eva‎luated by increasing the number of poles and changing the type of winding. Considering the importance of reliability in position sensors, the review addresses the performance of the resolver in error conditions and compares the performance of different structures presented in error conditions. Ultimately, some methods are suggested to increase the accuracy and improve the performance of the resolver.

فاطمه زارع

حميدرضا كارشناس , محمد سعيد مهدوي