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Implementation of DTC-SVM (Sample Reference Phase Voltages) of Induction Motor Using Arduino UNO
Y. Laxmi Narasimha Rao and G. Ravindranath

Recent advances in Solid State devices paved better scope for controlling ac drive in simpler manner rather than complexity. Low-cost evaluation controller board makes things simple and easier. For controlling speed of ac drives especially for induction motor many techniques are available among them vector and scalar controls have been predominant for the last two decades. Scalar control provides speed control keeping the ratio V/f (flux as constant) at the cost of poor dynamic response. To improve dynamic performance of asynchronous drive vector control is used. Among them, DTC-SVM of induction motor gives better results. Prior to DTC-SVM of ac drive field-oriented control of induction motor was popular but its implementation is complex and is costlier. DTC-SVM (Conventional) makes the flux and torque independent by using required transformations, but it requires sector identification for the reference voltage to calculate the operating point of the reference and makes the algorithm complex for implementation. The modified DTC-SVM of induction motor using sample reference phase voltage do not require sector identification and is simple to implement. ARDUINO UNO is the controller used for variable speed operation of induction motor drive which is low cost when compared to FPGA or DSP processors. Initially Simulink is developed, and results are obtained, later Simulink model is interfaced with ARDUINO UNO where gating signals are deployed on Hardware kit. Simulated results of MATLAB and Hardware implementation are compared to validate the proposed results.

Keywords: Field oriented control, scalar control, vector control, DTC-SVM, arduino uno

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