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Novel Technique for Designing LC Filter in Torque-Speed Control of DC Motor


  • Department of Electrical and Electronics Engineering, Graphic Era University, Dehradun – 248002, Uttarakhand, India


Objectives: To comprehend transient behaviour of circuit, mathematical model of DC engine is produced utilizing MATLAB/SIMULINK. Torque (Te) is corresponding to current. Current is high at beginning because of zero back EMF and as it spans to enduring state current decreases. Speed can be obtained from torque, and rotor position Θ from speed. Methods: These conditions are displayed in SIMULINK/MATLAB to model DC engine. This model was utilized to watch transient condition and LC channel control was executed. DC engine replaces regular brushed engines because of its focal points like higher proficiency utilizing channel plan. In this paper, DC drive circuit and control is re-enacted. A profoundly effective second order LC passive filter is designed and implemented. Findings: In this article the harmonics content of the voltage and current for a DC motor is dissected. From the simulation comes about it is obvious that the harmonic segments at the exchanging frequency and multiple of exchanging frequency are lessen by the filter. From the trial comes about, it is found that up to a decent degree the harmonics segments are lessened with filter. The present waveforms are smoothened by the filter amid the operation and the substitution frequency harmonics limited and consequently the torque swell is reduced. It is presumed that, it is conceivable to acquire exact speed control of DC motor utilizing a LC filter. Again here the utilization of a sensor is not executed for the speed control of the framework, rather than that a sensor less control method is actualized keeping in mind the end goal to get the stator and rotor position of the framework. Conclusion: The sensor less piece of the framework is finished by utilizing back EMF discovery strategy where the back EMF of the motor is recognized with the assistance of channels and from these signs a sine wave is gotten and they are contrasted and the triangular waveforms with the assistance of controllers. A basic strategy of recognize back EMF zero intersection for a DC motor utilizing line voltage is proposed.


AC Supply, Capacitor, DC Series Motor, Filter, Inductor, Rectifier, Thyristor.

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