Research on Parasitic Bipolar Inductance Absolute Angle Sensor

ZHANG Bo; CHEN Xiaoli; GUO Henan; QU Jinchen; LI Jie; LI Jianhua; JIANG Yong; WEN Xiaolong

doi:10.11999/JEIT220610

Volume 45 Issue 6

Jun. 2023

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Article Navigation > Journal of Electronics & Information Technology > 2023 > 45(6): 1944-1951

ZHANG Bo, CHEN Xiaoli, GUO Henan, QU Jinchen, LI Jie, LI Jianhua, JIANG Yong, WEN Xiaolong. Research on Parasitic Bipolar Inductance Absolute Angle Sensor[J]. Journal of Electronics & Information Technology, 2023, 45(6): 1944-1951. doi: 10.11999/JEIT220610

Citation:

ZHANG Bo, CHEN Xiaoli, GUO Henan, QU Jinchen, LI Jie, LI Jianhua, JIANG Yong, WEN Xiaolong. Research on Parasitic Bipolar Inductance Absolute Angle Sensor[J]. Journal of Electronics & Information Technology, 2023, 45(6): 1944-1951. doi: 10.11999/JEIT220610

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Research on Parasitic Bipolar Inductance Absolute Angle Sensor

doi: 10.11999/JEIT220610

ZHANG Bo^{1, 2, 3},
CHEN Xiaoli^{1, 2},
GUO Henan^{1, 2},
QU Jinchen^{1, 2},
LI Jie^{1, 2},
LI Jianhua^{1, 2
,
,},
JIANG Yong²,
WEN Xiaolong^{1, 2, 3}

1.
Department of Physics, University of Science and Technology Beijing, Beijing 100083, China
2.
Beijing Engineering Research Center of Detection and Application for Weak Magnetic Fieldy, Beijing 100083, China
3.
The State Key Laboratory of Transducer Technology, Shanghai 200050, China

Funds: The National Natural Science Foundation of China (62031025), The Project of State Key Laboratory of Transducer Technology China (SKT2105), The Fundamental Research Funds for the Central Universities (FRF-BR-20-02B)

Received Date: 2022-05-13
Accepted Date: 2022-09-06
Rev Recd Date: 2022-09-05

Available Online: 2022-09-09

Publish Date: 2023-06-10

Abstract

Abstract

As the core positioning component of the motor, the angle sensor has an important impact on the positioning accuracy of the motor. In this paper, a bipolar inductive absolute angle sensor is designed. The sensor measures the angle by periodically changing the induced voltage in the coil. The sensitive structure includes mainly the rotor and stator, the integration with the motor spindle can be realized. The rotor is composed of inner and outer single cycle and multi cycle fan-shaped copper foil in a bipolar layout, and the stator is composed of excitation coil, receiving coil and subsequent processing circuit. There are two groups of receiving coils in the stator. One group of coils is composed of 8 loops, corresponding to multi cycle sector copper foil on the outer edge, and the other group is composed of 2 loops, corresponding to 180° sector (semicircular) copper foil on the center. The two groups of coils are independent of each other and do not affect each other. When the rotor rotates above the receiving coil, the eddy current generated in the rotor will make the induced voltage of two adjacent receiving coils change in the form of periodic sine and cosine. The measurement accuracy of 8-loop coil is high, but multiple periodic signals will appear within 360°, so the absolute position measurement can not be realized. By measuring the number of cycles of the coil, the problem is solved by identifying the number of cycles of the coil 1 and the number of cycles of the coil 2. The sine and cosine signals are identified and solved by the algorithm, and the prototype is tested based on the high-precision turntable. The results show that the measurement error of the sensor can reach 0.04°, which meets the requirements of motor position control accuracy, and verifies the feasibility of the scheme.
- Motor positioning,
- Bipolar,
- Inductive angle sensor,
- Electromagnetic induction,
- Absolute position

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References(16)

References

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