| 摘要 |
PURPOSE:To enable momentary generating torque to be directly found, by detecting space rotation current vector and space rotation magnetic flux vector, and by operating the space rotation vectors arithmetically. CONSTITUTION:Vector analysers 3, 7 for inducting space rotation current vector and space rotation magnetic flux vector respectively from two phase current and two-phase magnetic flux are provided. The values of the space rotation magnetic flux vector PSIs and the space rotation current vector Is obtained from the vector analysers 3, 7 are fed respectively to a Sinphi arithmetic unit 6 and a multiplier 8, and Sinphi (phi is space phase difference between vectors.) and ¦PSIs¦.¦Is¦ are obtained. The Sinphi found by the Sinphi arithmetic unit 6 is induced to a multiplier 10 via a counter 9 for multiplying the coefficient K1 corresponding to n(polar logarithm), and ¦PSIs¦.¦IS¦ found by the multiplier 8 is fed to the multiplier 10, and the mutual product is found to obtain momentary generating torque taue. |
