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Research of Direct Torque Control Based on the Load Angle Control

Shang Chong-yang

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Abstract

A novel direct torque control scheme based on space vector modulation(SVM) is proposed.With adjusting the torque error by a PI controller,the load angle of next sample period is calculated.Combined with the rotor flux position,the anticipant stator flux vector is obtained.The switch signals of the inverter is generated by SVM technique.Simulation results show that this system can effectively reduce the ripple of motor torque and stator flux,especially at lower speed range.

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What this paper is about

A novel direct torque control scheme based on space vector modulation(SVM) is proposed.With adjusting the torque error by a PI controller,the load angle of next sample period is calculated.Combined with the rotor flux position,the anticipant stator flux vector is obtained.The switch signals of the inverter is generated by SVM technique.Simulation results show that this system can effectively reduce the ripple of motor torque and stator flux,especially at lower speed range.

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Available abstract

A novel direct torque control scheme based on space vector modulation(SVM) is proposed.With adjusting the torque error by a PI controller,the load angle of next sample period is calculated.Combined with the rotor flux position,the anticipant stator flux vector is obtained.The switch signals of the inverter is generated by SVM technique.Simulation results show that this system can effectively reduce the ripple of motor torque and stator flux,especially at lower speed range.

Key concepts: Direct torque control, Control theory (sociology), Stator, Torque, Torque ripple, Vector control, Space vector modulation, Rotor (electric)

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