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A Novel Direct Torque Control Method for PermanentMagnet Synchronous Motor(PDF)

南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2014年04期
Page:
17-
Research Field:
Publishing date:

Info

Title:
A Novel Direct Torque Control Method for PermanentMagnet Synchronous Motor
Author(s):
Liu Jian; Yang Jianfei; Wu Huaren; Hua Xinyi; Guo Aiqin
(1.School of Electrical and Automation Engineering,Nanjing Normal University,Nanjing 210042,China)(2.3D Printing Equipment and Manufacturing Key Lab of Jiangsu Province,Nanjing 210042,China)
Keywords:
permanent magnet synchronous motor; power factor; reactive current; direct torque control
PACS:
TM761
DOI:
-
Abstract:
The double closed loop structure of stator flux linkage and torque is used to realize direct control of motor torque in traditional direct torque control of permanent magnet synchronous motor.Because flux amplitude is kept as constant,dynamic performance of the motor is not only restricted,but also reactive current is increased.When reactive current is increased,motor power factor is reduced and system loss is increased.From the points of perspective of optimal control of the torque and reactive current,a novel direct torque control method is presented in this paper.Voltage vectors are merely selected according to the requirement of the torque control in the period of control.In the control process,stator flux amplitude can be dynamically adjusted and rotor position is less demanded.So dynamic performance of the motor and power factor are significantly improved.The correctness and feasibility of the proposed method are verified by the simulation results.

References:

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Last Update: 2014-12-31