How to minimise losses in converter-fed induction motors
Thursday, 06 October, 2011
This study presents a technique developed to minimise losses in totally enclosed fan-cooled (TEFC) induction motors fed by frequency converters in applications with constant torque loads, especially at low speeds, in which the ventilation system is inefficient.
The optimal flux solution avoids the need for torque reduction, motor oversizing and/or independent ventilation, for the motor temperature rise to be kept within the limits of its insulation thermal class.
By means of the implementation of an optimal flux versus frequency curve into commercial static frequency converters, the study provided a (motor+converter) solution, which optimises the variable.
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