AC Motor Speed Control Using Variable Frequency Drive (VFD)

Paper Topic :

Control and Automation

Author Name :

Sumedh Gururaj Tonapi

Abstract :

This paper discusses speed control of AC motor using Variable Frequency Drive (VFD). The speed of AC motors remains constant as it takes rated power from supply and therefore, this VFD mechanism provides an approach for variation in speed of AC motors. The paper presents the working principle of VFD and also its performance and the use of Pulse Width Modulation (PWM) in the three phase inverter to control or maintain the ratio of voltage to frequency is discussed. The model is simulated analyzed using spice models and the results are. This paper is intended to provide the basic understanding of VFD terms, VFD operations and Power factor improvement.

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