| 摘要 |
PURPOSE:To improve the responding characteristic by shortening the calculating time without dividing by providing a 1/X function table. CONSTITUTION:A 1/X function table which commonly uses in a division of parameters of rotating speed detecting calculation of an induction motor, a secondary current calculation, a slip frequency calculation, a phase calculation and a magnetic flux weakening command calculation, and the division of various parameter is performed by the multiplication of multipliers 37, 39, 55 of data obtained from the 1/X tables 36, 38, 57. Thus, the calculating time can be shortened for the divisions, and the tables are commonly used for all divisions, thereby preventing the memory capacity from increasing. |
