Speed squirrel cage motor control is an area of research that has been in evidence for some time now. In this paper, a nonlinear controller is presented for the squirrel cage motor drives, based on a combination between input-output feedback linearization control (IOLC) technique and sliding mode control (SMC) to create a new control which is sliding input-output linearization (SIOLC) control of squirrel cage motors which associates by an NPC five levels inverter PWM technical used for the variation of its speed, where the sliding mode control it used for controlling the speed of squirrel cage motor and the input-output linearization control applied for two input witch are flux and current. To test robustness and performance of sliding input-output linearization control (SIOLC) we created a variation of internal parameters of the motor. The simulation results show robustness the sliding input-output linearization control of squirrel cage motor responses.

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Abstract-The voltage source inverter has a diversity known in many industrial applications, such as the variation speed in electrical training. But the characteristic inverter recognized grace of the power electronic development can presented a structural faults, however the closed fault of semiconductors, that can provoke a serious problem for the protection of the system. this article presented the diagnostic of the inverters multi levels associates with the three-phase asynchronous squirrelcage machines witch show the faults of the switches for each inverter multi levels and their influence on the answers of speed and torque.Index Terms--asynchronous machine, fault, inverter five levels, inverters seven levels

The induction machine will play a role very important in the industry, but the existence of a certain defect returns their use limited as the defects rotor (broken bar

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