| 摘要 |
PROBLEM TO BE SOLVED: To obtain the points of time and durations of vectors of each sequence from an unexpensive servo control system by determining for each sequence, command vectors amongst stator voltage vectors so as to bring electromagnetic torque and stator flux optimally towards a reference torque and a reference stator flux. SOLUTION: A servo control system selectively controls and adjusts each switch by signals C1, C2, C3. These signals are properly programmed, and set in a computer 4 which received instructions concerning a reference electromagnetic torque and a reference flux. Besides, the serve control system has an observer 5, and measures and estimates instantaneous values of the torque and stator flux of a rotating machine by a set of sensors 6. The computer 4 determines for each sequence command vectors amongst possible states of a stator voltage vector, brings the torque and the stator flux optimally towards the reference torque and the reference flux, and commands the multi-state switches accordingly. |
