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FM600 Manual - Crown Broadcast
FM600 Manual - Crown Broadcast

... procedure. Simply select your operating frequency (using 5 external switches), add an audio source, attach an antenna, and connect AC power and you're ready to broadcast. Of course, the FM series of transmitters also feature more sophisticated inputs and monitoring connections if needed. Reliability ...
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... source during all plant operating modes and eliminates the need for bus transfers during plant startup or shutdown. Main generator protection is provided by a primary and backup protection scheme. Protective device actuation trips the main generator output breakers in the switchyard, trips the gener ...
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... (FSOI) is an optical link where the propagation medium is air. FSOI is intended to replace electrical interconnects at the board/chip level in near future. In recent years, optical interconnects have made a tremendous impact on the ability to communicate over long distances. Fiber optic cabling over ...
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Variable-frequency drive



A variable-frequency drive (VFD) (also termed adjustable-frequency drive, variable-speed drive, AC drive, micro drive or inverter drive) is a type of adjustable-speed drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and voltage.VFDs are used in applications ranging from small appliances to the largest of mine mill drives and compressors. However, around 25% of the world's electrical energy is consumed by electric motors in industrial applications, which are especially conducive for energy savings using VFDs in centrifugal load service, and VFDs' global market penetration for all applications is still relatively small. That lack of penetration highlights significant energy efficiency improvement opportunities for retrofitted and new VFD installations.Over the last four decades, power electronics technology has reduced VFD cost and size and has improved performance through advances in semiconductor switching devices, drive topologies, simulation and control techniques, and control hardware and software.VFDs are available in a number of different low- and medium-voltage AC-AC and DC-AC topologies.
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