Improving the Performance of Variable Reluctance Resolver Against Short Circuit Using Physical Parameters

Abstract

Variable reluctance resolver is one of the popular sensors used in the industry. Because they can operate at high temperatures, withstand shock and less expensive and easier to manufacture. Despite the mentioned advantages, the variable reluctance resolver may suffer from faults that lead to inaccurate position. The paper aims to reduce position error under short circuit fault by changing parameters such as excitation frequency, number of signal and excitation poles, shape of the air gap, slot opening width and the number of teeth. The effect of each parameter on reducing the position error is examined to determine whether it has a positive, a negative or zero effect. Finally, the optimal case is introduced by selecting the best value for each parameter, which significantly reduces the position error.