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Harmonic Distortion in VFD: Causes, Effects and How to Reduce It

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Variable Frequency Drives (VFDs) have become essential in modern industrial facilities. They provide precise motor speed control, reduce energy consumption, improve process performance, and help extend the operational flexibility of pumps, fans, compressors, conveyors, and many other motor-driven applications. However, VFD technology also introduces a power quality challenge that engineers and maintenance teams cannot ignore: harmonic distortion . A VFD does not draw electrical current from the power supply in the same smooth, sinusoidal waveform associated with a simple linear load. Instead, its internal power electronics convert AC power to DC and then invert that DC power back into a variable-frequency AC output for the motor. This switching and conversion process can distort the current waveform and introduce harmonic components into the electrical system. If harmonic distortion is not properly evaluated and controlled, it can contribute to overheating, increased electrical losses,...
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Industrial Automation in Mining: PLC, SCADA and DCS Applications

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Mining operations depend on complex electrical, mechanical, and process systems that must operate safely, continuously, and efficiently. Industrial automation in mining integrates PLC , SCADA, and DCS technologies to control equipment, monitor processes, reduce downtime, and improve operational visibility across the mine. From crushers and conveyors to pumping stations, ventilation systems, grinding circuits, and mineral processing plants, automation has become a critical part of modern mining infrastructure. What Is Industrial Automation in Mining? Industrial automation in mining refers to the use of control systems, instrumentation, industrial networks, software, and automated equipment to monitor and control mining processes with limited manual intervention. A modern mining operation can contain thousands of sensors, motors, variable frequency drives (VFDs), valves, pumps, protection devices, and control panels. Without an integrated automation architecture, collecting and managing ...
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PLC vs DCS: Which Control System Should You Choose?

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  Choosing between a PLC and a DCS is not simply a technical decision. It affects project cost, plant reliability, future expansion, maintenance workload, and production performance. Both systems can monitor equipment, process field signals, execute control logic, and support operator interfaces. However, they are designed around different control philosophies. Understanding these differences helps plant managers and project teams select a system that supports both current operations and long-term business goals. What Is a PLC? A Programmable Logic Controller, or PLC, is an industrial controller designed to automate machines, production lines, and equipment that require fast and reliable responses. A PLC continuously reads signals from field devices, executes the programmed logic, and updates its outputs. This process is known as the PLC scan cycle and usually happens within milliseconds. For example, a PLC can detect a product on a conveyor, activate a motor, stop the line when a ...
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