An adaptive interconnected observer and high order sliding mode (HOSM) control of Induction Motors (IMs) without mechanical sensors (speed sensor and load torque sensor) are proposed. The adaptive interconnected observer estimates fluxes, angular velocity, load torque and the stator resistance. The speed-flux control law is an original HOSM one: a sliding manifold is designed in order to ensure finite-time convergence of sliding variable and its high order time derivatives to zero in spite of uncertainties and perturbations. Stability based on Lyapunov theory is proved to guarantee the "observer-controller" stability. A contribution of the paper is the validation of the observer-controller for realistic three cases with nominal value of the external load disturbance : at low speed, at high speed, and under conditions of unobservability (low frequencies). Robustness with respect to parameters variations is proved and experimentally verified.