![](/assets/images/picto-drapeau-france-3a76576a5d60a512053b4612ab58dae5.png)
3. Conclusion
Depending on the type of application, drive power, speed range, etc., the most appropriate control mode for the asynchronous machine will not be the same. Even a brief presentation of these controls shows the advantages and disadvantages of each, and how they complement each other. Many studies have focused on :
the robustness of these commands as a function of parametric variations;
performance without a speed sensor, even in the very low-speed, high-torque range;
the various deterministic and stochastic, linear and extended observers that can be used to estimate flow, velocity and possibly load torque.
Today's drives are very efficient, but there are still a number of problems that have not been satisfactorily resolved:
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