|Table of Contents|

 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.

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Last Update: 2018-06-28