Abstract:Wound rotor induction motors are used in heavy duty drives in the range of hundreds kW, like cement and minerals industries. Important users make use of hundred of such drives, summing hundreds of MW. Despite their technical capabilities to easily operate at variable speed, the large amount of losses which occur at low speeds determine the users to use the facility given by the wound rotor only for starting. Even so, the losses specific to the additional rotor resistors are quite important, given the range of … Show more
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