| 摘要 |
PURPOSE:To obtain a high-speed torque responsiveness by calculating the prescribed vactor on the basis of a torque current command value and an exciting current command value to obtain the primary current command value, a slip angle frequency and a magnetic flux phase change amount. CONSTITUTION:A vector calculator 8 in a CPU 9 calculates the prescribed vector on the basis of a torque current command value I*T and an exciting current command value I*O to obtain the primary current command value I*I, a slip angle frequency omegas and a magnetic flux phase change amount DELTAphi. The primary current waveform output unit 13 extracts U- and V-phase sinusoidal data corresponding to the polarity of the primary angle frequency omega0 from a data table, stops extracting, extracts U-, V-phase sinusoidal data corresponding to the variation of DELTAphi from the table, and delays the extracted sinusoidal data for the prescribed time to output them. A multiplier 12 multiplies the data by the primary current command value I*I to obtain the U-, V-phase primary current command values I*, I*V. |
