| 摘要 |
PURPOSE:To calculate the secondary current of an induction motor in a short time and with high precision by calculating the secondary current from, while time, position and phase are considered, the secondary currents flowing in secondary coils extracted by an secondary current extracting means. CONSTITUTION:Slip (s) of the rotor in magnetic field analysis is represented in an equation based on multiple ns of primary current time cycle (integer), rotor slot numbers NS2(2P) (integer) per two poles of to-be-analyzed machine and rotor slot numbers N2t (integer) delayed in rotating from cycle speed of magnetic field generated by a stator coil during ns times of primary current time cycle. The time amount of magnetic field analysis time interval is set to at least ns times of primary current time cycle, and the secondary current generated at each rotor coil in the analysis time interval is synthesized in time series in synchronous to the movement state of the rotor slots, so that the amount of one cycle of secondary current is calculated and displayed. |
