Industrial electrical troubleshooting9/18/2023 ![]() ![]() Pulse width modulated (PWM) inverter drives are the most prevalent type of AC drives ( Fig. Since failure in these devices can be often attributed to the rectifier section, you'll need a fundamental understanding of transistors, diodes, silicone controlled rectifiers (SCRs), and insulated gate bipolar transistors (IGBTs). ![]() They control a wide variety of devices like pumps, conveyors, air handlers, chillers, machine tools, mixers, and a host of other devices once designed to run at constant speed or be powered by DC. Solid-state electronic AC motor drives are becoming more common within industrial plants. Chances are, you won't be an expert in repairing these devices, but you can take some practical steps to solve problems and help get your systems operational again in a timely manner. As an industrial electrician, you'll encounter many complex electrical circuits and drives that will break down as they age. ![]()
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