Synchronous Machines

Linear Synchronous Motors

For rotary AC motors, asynchronous (induction) motors are more common than synchronous motors. But when it comes to linear motion, linear synchronous motors, abbreviated LSMs, are more common. The vast majority of LSMs I’ve seen have permanent magnets, so this article focuses exclusively on permanent magnet LSMs. Structure of Linear Synchronous Motors In general, linear […]

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Operation of Synchronous Motor Drives

Operation of Synchronous Motor Drives As soon as variable-frequency inverters became a practicable proposition it was natural to use them to supply synchronous motors, thereby freeing the latter from the fixed-speed constraint imposed by mains-frequency operation and opening up the possibility of a simple open-loop controlled speed drive. The obvious advantage over the inverter-fed induction

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Synchronous Motors

Synchronous motors provide a precise, specific and constant speed for a wide range of loads, and are therefore used in preference to induction motors when constant speed operation is essential. Such machines are available over a very wide range from tiny single-phase versions in domestic timers to multi-megawatt machines in large industrial applications such as

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Synchronization of Alternators

The procedure of connecting an alternator in parallel with another or with common bus bars is called synchronization of alternator. Conditions for Synchronization of Alternators For proper synchronization of alternator, the following conditions must be fulfilled: All these conditions must be full filled to ensure that there will be no circulating current between the windings

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