Hardware Implementation of Direct Load Angle Controlled Induction Motor Drive |
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Authors: | Thippiripati Vinay Kumar Sandepudi Srinivasa Rao |
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Affiliation: | Electrical Engineering Department, National Institute of Technology, Warangal, India |
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Abstract: | In this article, a direct load angle (DLA) control method for induction motor drive is proposed to reduce the torque and flux ripple. It is based on control of incremental change in load angle. The torque control is achieved without losing the benefits of conventional direct torque control (DTC) by reference stator flux angle, which is the sum of load angle and rotor flux angle. In this proposed DTC scheme, coordinate transformation is not required in torque control unit and reference voltage sector number and angle are not required in PWM unit, which reduces the control complexity. Proposed DTC control method is applied to two level voltage source inverter fed induction motor drive and hardware results are presented. From the hardware results, it is found that the proposed DTC control scheme impressively reduces the torque and flux ripples when compared with conventional space vector modulation (SVM) DTC. |
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Keywords: | AC drive control of electrical drive direct load angle control direct flux control dynamic response induction motor drive space vector modulation speed PI controller design torque PI controller design two-level inverter |
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