Direct sliding mode speed observer of permanentmagnetic synchronous motor(PDF)
[ISSN:1007-449X/CN:23-1 408/TM]
- Issue:
- 2018年01
- Page:
- 86-92
- Research Field:
- Publishing date:
Info
- Title:
- Direct sliding mode speed observer of permanentmagnetic synchronous motor
- Author(s):
- LU Jun1; YANG Jian-guo2
- ( 1． The 32nd Ｒesearch Institute of China Electronics Technology Group Corporation，Shanghai 201808，China;2． School of Mechanical Engineering，
Donghua University，Shanghai 201620，China)
- Keywords:
- ; permanent magnet synchronous motors; sensorless; sliding mode; speed observer; directtorque control
- PACS:
- TM 301. 2
- DOI:
- 10.15938/j.emc.2018.01.012
- Abstract:
- Accuracy and dynamic response of conventional indirect speed observer is decreased due to po-sition differential，low pass filter and phase compensation for electromotive force ( EMF) ． A direct slidingmode speed observer( DSMSO) of permanent magnet synchronous motor was presented to solve this prob-lem． Sliding mode observer was established by dynamic differential equation of motor current． Accordingto Lyapunov stability analysis，convergence condition of observer was derived． Observer parameters wereobtained while speed-estimating model was derived． Simulation and experimental results show that，com-pared with indirect speed observer，steady accuracy of DSMSO at low speed and middle-high speed is im-proved by 40． 68% and 50% ，respectively． Dynamic accuracy is increased by 51． 67% and 32． 61% re-spectively while convergence rate of observer error is increased by 33． 33% and 25% respectively duringacceleration and deceleration．
Last Update: 2018-06-28