A DSP-CONTROLLED HIGH ACCURACY SPEED MEASUREMENT TECHNIQUES FOR MOTION CONTROL IN PMSM DRIVERS

Year 2018, Volume: 13 Issue: 1, 13 - 20, 19.01.2018

Yusuf Ulu Fırat Parlak

Abstract

In
motion control drives, speed measurement with high accuracy is an important
issue and has great influence on the motor performance. In this paper, speed
measurement techniques' affects for motion control in permanent
magnet synchronous machine (PMSM) with low resolution incremental encoder
are discussed. Conventional speed measurement techniques such as measuring
frequency method (M-method, measuring period method
(T-method) and measuring both frequency and period method (M/T-method) are
introduced. The simulation results are obtained in MATLAB/Simulink and the
experimental results are presented based on TMS320x28xxx. Simulation and
experimental comparative analysis of the various methods results show that
M-method is suitable for high speed measurement, T-method is suitable for low
speed measurement and M/T method is not related with speed and it works in both
low speed and high speed. So the M/T method is better than the M-method and
T-method and the speed measurement error is less than other methods with a high
precision in a wide speed range.

Keywords

DSP, Speed Measurement, Motion Control, Incremental Encoder, Permanent Magnet Synchronous Machine (PMSM)

References

• 1. Kennel, R.M., (2006). Why Do Incremental Encoders Do a Reasonably Good Job in Electrical Drives with Digital Control?. Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting, Tampa, FL, pp:925-930.
• 2. Briz, F., Cancelas, J.A., and A. Diez, A., (2006). Speed Measurement Using Rotary Encoders for High Performance AC Drives. Industrial Electronics, Control and Instrumentation, 1994. IECON '94., 20th International Conference on, Bologna, Cilt:1, pp:538-542.
• 3. Seung-Ki, S., (2011). Control of Electric Machine Drive Systems, Wiley-IEEE Press.
• 4. Ohmae, T. Matsuda, T., Kamiyama, K., and Tachikawa, M., (1982). A Microprocessor-Controlled High-Accuracy Wide-Range Speed Regulator for Motor Drives, in IEEE Transactions on Industrial Electronics, Cilt:IE-29, No:3, pp:207-211.
• 5. Belanger, P.R., (1992). Estimation of Angular Velocity and Acceleration from Shaft Encoder Measurements, Proceedings 1992 IEEE International Conference on Robotics and Automation, Nic, pp:585-592, vol:1.
• 6. Fujita, K. and Sado, K., (1990). Instantaneous speed detection with parameter identification for AC servo systems, Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting, Seattle, WA, USA, pp:632-638, vol:1.
• 7. Petrella, R., Tursini, M., Peretti, L., and Zigliotto, M., (2007). Speed Measurement Algorithms for Low-Resolution Incremental Encoder Equipped Drives: a Comparative Analysis, 2007 International Aegean Conference on Electrical Machines and Power Electronics, Bodrum, pp:780-787.
• 8. http://www.smb-technics.com/tr/