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A New Approach to Direct Torque Control for Induction Motor Drive Using Amplitude and Angle of the Stator Flux Control
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 Title & Authors
A New Approach to Direct Torque Control for Induction Motor Drive Using Amplitude and Angle of the Stator Flux Control
Kumsuwan, Yuttana; Premrudeepreechacharn, Suttichai; Toliyat, Hamid A.;
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This paper proposes the design and implementation of a direct torque controlled induction motor drive system. The method is based on control of decoupling between amplitude and angle of reference stator flux for determining reference stator voltage vector in generating PWM output voltage for induction motors. The objective is to reduce electromagnetic torque ripple and stator flux droop which result in a decrease in current distortion in steady state condition. In addition, the proposed technique provides simplicity of a control system. The direct torque control is based on the relationship between instantaneous slip angular frequency and rotor angular frequency in adjustment of the reference stator flux angle. The amplitude of the reference stator flux is always kept constant at rated value. Experimental results are illustrated in this paper confirming the capability of the proposed system in regards to such issues as torque and stator flux response, stator phase current distortion both in dynamic and steady state with load variation, and low speed operation.
Direct torque control;Induction motor;Space vector modulation;Stator flux control;
 Cited by
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