Vhsvf- series-vvvf adjustable speed vertical hollow-shaft motors designed with computer aided techno

Vhsvf- series-vvvf adjustable speed vertical hollow-shaft motors designed with computer aided technology. In order to apply the supply,the stator,rotor slot and distribution of stator winding have been given special consideration to get a suitable inductance value for restraining and reducing adverse effects caused by time harmonic wave and a series of space harmonic waves produced by the former. Allowance for electromagnetic load has been taken into account to ensure the overload capability at high frequency and constant torque output at low frequency.