Motor Position Detection Unit for Servo Control Application

Abstract:

Rotor position detection is important for motor servo system design. In general, there are two kinds of methods to obtain the position information in real time, sensor or sensorless methods. The sensor methods use position sensors such as optical encoder. This will greatly increase the cost of the system, and the sensor with high precision is difficult to be installed. On the other hand, the sensorless method can reduce the cost, but the reliability and complexity of the algorithm is still the problems. In this paper, a new low-cost integrated position detection unit, which is composed of the integrated position sensor, signal processing hardware and software, is described. The sensor is easy to manufacture and has better precision with the help of signal processing circuit and software based on DSP. The sensor can obtain absolute rotating angle using inductance detection method, and it is originally designed and used for a 2-phase hybrid stepping motor position servo system. Even though the feedback unit is originally designed for a 2-phase hybrid stepping motor, the same unit also can be used with other types of motors.

• Periodical: Advanced Materials Research (Volumes 433-440)
• Pages: 6272-6278
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.433-440.6272
• Online since: January 2012
• Authors: Shu Zhong Song, Jing Zhuo Shi
• Keywords: Inductance, Position Detection, Servo, Stepping Motor

References

[1] N. Bianchi, S. Bolognani, Jang Ji-Hoon, Sul Seung-Ki. Comparison of PM motor structures and sensorless control techniques for zero-speed rotor position detection, IEEE Transactions on Power Electronics, vol. 22, 2007, pp.2466-2475.

DOI: 10.1109/tpel.2007.904238

[2] B. Fahimi, A. Emadi, Jr. Sepe, B. Position sensorless control, IEEE Industry Applications Magazine, vol. 10, 2004, pp.40-47.

DOI: 10.1109/mia.2004.1256251

[3] S. Morimoto, M. Sanada, Y. Takeda. Mechanical sensorless drives of IPMSM with online parameter identification, IEEE Transactions on Industry Applications, vol. 42, 2006, pp.1241-1248.

DOI: 10.1109/tia.2006.880840

[4] K. Ohyama, G.M. Asher, M. Sumner. Comparative analysis of experimental performance and stability of sensorless induction motor drives, IEEE Transactions on Industrial Electronics, vol. 53, 2005, pp.178-186.

DOI: 10.1109/tie.2005.862298

[5] J.P. Lyons, S.R. MacMinn, M.A. Flux/current methods for SRM rotor position estimation, Rec. of IEEE Industry Applications Soc. Annual Meeting. 1991, pp.482-487.

DOI: 10.1109/ias.1991.178199

[6] Gabriel Gallegos-Lopez, Philip C. Kjaer. High-grade position estimation for SRM drives using flux/current correction model, IEEE Trans. On Industry Applications, vol. 35, 1999, pp.859-869.

DOI: 10.1109/28.777195

[7] M. Ehsani, I. Husain, S. Mahajan. New modulation encoding tech-niques for indirect rotor position sensing in switched reluctance motors, IEEE Trans. On Industry Applications, vol. 30, 1994, pp.85-91.

DOI: 10.1109/28.273625

[8] R. Horber, Sensorimotor: P.M. synchronous motor with fully integrated position sensor, Proc. of 19th Symp. On Increment Motion Control & System Design, Illinois, U.S.A., 1990, pp.243-250.

[9] K. Marushima, Ralph W. Horber, Development of a High-performance Sensorimotor with Sensor and Driving Coils, Proc. Of 23rd Symp. On Increment Motion Control & System Design, Illinois, U.S.A., 1994, pp.59-69.