VP16-02 Analysis of Inductive Angular Position Sensor with the Characteristic of Annular Sector Coils
Creators: Dan-Ping Xu1*
Silong Fang1
Yi Zhao1
Fanlin Zeng2
Sang-Moon Hwang3
Publisher: name: IEEE
Year: 2025

More interests and attentions were taken into the inductive angular position sensor because of their high accuracy and low price in the electric drive system. As showed in Fig.1 (a), three models with different annular sector coil structures were designed to study the effect of characteristic of coils to the performance and accuracy of an Inductive Angular Position Sensor (IAPS). The structure of an IAPS was divided into two parts: a PCB stator and a rotor [1]. The coils were manufactured into a PCB and were composed of three parts: one set of excitation coil and two sets of receiving coils. The receiving coils shuttled back and forth as a sine shape or a cosine shape between the layers of excitation coil and connected by copper pillars. A chip also placed on the PCB to process the voltage signals induced from the receiving coils [2]. The metal rotor was assembled on the shaft and sealed in the motor enclosure with 4 blades related with the pole number of motor was employed in this study. Compared with the Type A, three time turns of receiving coils were structured in Type B. And Type C had a doubled length of both excitation coil and receiving coils compared with Type B. The parameters and dimensions of three structures were detailed in Table I. The magnetic analyses were simulated by using finite element method. The detailed working principle and the effect of characteristic of annular sector coils of the IAPS would be illustrated in the manuscript [3]. The distributions of magnetic flux density were obtained as shown in Fig.1 (b). The simulated three type induced voltages obtained in the receiving coils could be used to signal processing and derived the simulated angular errors. Three prototypes as in Fig.1 (a) were manufactured. The experimental induced voltages would verify the simulation results, and the experimental accuracies would be compared with the simulated accuracies after voltage signals processing. The data processing and the detailed effect of coil characteristic would be presented in the full manuscript.References: [1] Q. Tang, D. Peng, L. Wu and X. Chen, "An Inductive Angular Displace-ment Sensor Based on Planar Coil and Contrate Rotor," in IEEE Sensors Journal, vol. 15, no. 7, pp. 3947-3954, July 2015, doi: 10.1109/JSEN.2015.2404349. [2] W. Gao, H. Shi and Q. Tang, "A Contactless Planar Inductive Sensor for Absolute Angular Displacement Measurement," in IEEE Access, vol. 9, pp. 160878-160886, 2021, doi: 10.1109/ACCESS.2021.3131344. [3] Dan-Ping Xu, Guochao Ma, Silong Fang, Fanlin Zeng, Sang-Moon Hwang “A Contactless Inductive Position Sensor with Four-Phase Rotor for Angular Displacement Detection.” IEEE transactions on magnetics 60.2 (2024): 1–5.
More interests and attentions were taken into the inductive angular position sensor because of their high accuracy and low price in the electric drive system. As showed in Fig.1 (a), three models with different annular sector coil structures were designed to study the effect of characteristic of coils to the performance and accuracy of an Inductive Angular Position Sensor (IAPS). The structure of an IAPS was divided into two parts: a PCB stator and a rotor [1]. The coils were manufactured into a PCB and were composed of three parts: one set of excitation coil and two sets of receiving coils. The receiving coils shuttled back and forth as a sine shape or a cosine shape between the layers of excitation coil and connected by copper pillars. A chip also placed on the PCB to process the voltage signals induced from the receiving coils [2]. The metal rotor was assembled on the shaft and sealed in the motor enclosure with 4 blades related with the pole number of motor was employed in this study. Compared with the Type A, three time turns of receiving coils were structured in Type B. And Type C had a doubled length of both excitation coil and receiving coils compared with Type B. The parameters and dimensions of three structures were detailed in Table I. The magnetic analyses were simulated by using finite element method. The detailed working principle and the effect of characteristic of annular sector coils of the IAPS would be illustrated in the manuscript [3]. The distributions of magnetic flux density were obtained as shown in Fig.1 (b). The simulated three type induced voltages obtained in the receiving coils could be used to signal processing and derived the simulated angular errors. Three prototypes as in Fig.1 (a) were manufactured. The experimental induced voltages would verify the simulation results, and the experimental accuracies would be compared with the simulated accuracies after voltage signals processing. The data processing and the detailed effect of coil characteristic would be presented in the full manuscript.References: [1] Q. Tang, D. Peng, L. Wu and X. Chen, "An Inductive Angular Displace-ment Sensor Based on Planar Coil and Contrate Rotor," in IEEE Sensors Journal, vol. 15, no. 7, pp. 3947-3954, July 2015, doi: 10.1109/JSEN.2015.2404349. [2] W. Gao, H. Shi and Q. Tang, "A Contactless Planar Inductive Sensor for Absolute Angular Displacement Measurement," in IEEE Access, vol. 9, pp. 160878-160886, 2021, doi: 10.1109/ACCESS.2021.3131344. [3] Dan-Ping Xu, Guochao Ma, Silong Fang, Fanlin Zeng, Sang-Moon Hwang “A Contactless Inductive Position Sensor with Four-Phase Rotor for Angular Displacement Detection.” IEEE transactions on magnetics 60.2 (2024): 1–5.