3 phase motor cable size, Contactor size, Starter selection chart: Note that, we did not include the voltage drop across the cable. Look at the Cable current rating Chart, 2.5Sqmm copper has the ability to carry 18 Amps, hence 2.5sqmm is suitable for 5.5kW/7.5HP motor Hence, the required cable shall able to carry minimum 15A current. Let’s we calculate required cable sizing for 5.5kW/7.5HP motor which is operated at 415V, 0.86pf.įrom our cable size calculator, the full load current of the 5.5kW motor is 10A. Hence the cable rating formula can be written as, The cable size is equal to the 1.5 times of the full load current of the motor/load. The effects of two kinds of sinusoidal suspension windings, 90° type and 120° type, on the optimization of suspension performance are analyzed, and the finite element analysis was used to verify that these two low-harmonic suspension winding structures, especially the 120° type, can effectively suppress the motor’s suspension magnetomotive force harmonics, improve the motor’s suspension force accuracy, and at the same time make the coupling problem between different suspension degrees of freedom of consequent-pole bearingless permanent magnet synchronous motor improved obviously.Learn More: Watts to kVA Conversion Calculator | Convert W to kVA
Aiming at the improvement of the motor’s suspension performance, a 48 slot 8-pole consequent-pole bearingless permanent magnet synchronous motor with low harmonic suspension sinusoidal winding is designed in this paper. The existence of the harmonic of the suspension magnetomotive force is a key factor affecting the precision of the suspension force of the Consequent-pole Bearingless Permanent Magnet Synchronous Motor, and the coupling of motor’s suspension force in different degrees of freedom is obvious.
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