4. Starting and speed control at constant frequency and voltage
Readers may also wish to refer to the article Asynchronous motors. Choices and related problems.
4.1 Reduced voltage starting
Figure 14 a shows the usual admittance diagram for a motor of the industrial type: the center C and very close to the reactive power axis, the points P 1 and P × are very close both to each other and to this axis. The point P n , corresponding to the nominal slip g n , is located in the left-hand part of the circle so that O P n...
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Starting and speed control at constant frequency and voltage
Speed control by frequency variation
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