This paper deals with voltage model flux estimators for speed sensorless induction motor drives. In order to eliminate the drift problems, the pure integrator of the voltage model is replaced with a first-order low-pass filter, and the error due to this replacement is compensated. An effective way to calculate the compensation is presented, and the compensation is carried out before the low-pas...

This paper presents to obtain the state estimations in low speed induction motor using Sensorless Constant Switching Frequency Controller (CSFC) technique. The state estimations referred to flux and torque. Therefore the CSFC enabling Induction motor with Direct Torque Control is built using the MATLAB/SIMULINK. The switching frequency is maintained constant in order to improve its state estima...

Adaptive interconnected observer for sensorless induction motor D. Traore a; J. De Leon b; A. Glumineau a; L. Loron c a IRCCyN-Institut de Recherche en Communications et Cybernétique de Nantes, Ecole Centrale de Nantes, France b Department of Electrical Engineering, Universidad Autonoma de Nuevo Leon, San Nicolas de Los Garza, N.L, Mexico c IREENA-Institut de Recherche en Electronique et Electr...

In this paper, a sensorless permanent magnet synchronous motor (PMSM) drive was presented based on calculating the back EMF using reference stator voltages, which are output of d-axis current controller, includes information about rotor position. Sensorless control estimates position necessary for vector without sensor or encoder. This can provide effects such as increased system reliability an...

• Robust sensorless commutation control. • External speed reference. • Overcurrent detection/protection. • Basic speed controller included. • Full source code in C. • Source code can be adapted to a new motor by changing parameters. • Several I/O pins/peripherals not used for motor control. Can be used for other purposes, such as status LEDs, communication or user input. • Works without modific...

This paper addresses the question “Can the object be pushed from here to there?” We characterize the set of objects that are controllable (can be positioned arbitrarily), with and without obstacles, for the cases of point and line pushing contact. For the case of line contact, we find a set of pushing directions that keep the object fixed to the pusher, and we use these pushing directions to fi...

The companion paper [2] derives an algorithm that determines the external wrenches consistent with constraints on the contact interactions between two rigid planar bodies. In this paper, we show how this algorithm may be used to create sensorless plans that guarantee that a workpiece is correctly inserted into a fixture. Our method explicitly removes all wrenches consistent with undesirable con...

The problem of controlling a sensorless induction motor (i.e. without rotor speed measurements) is addressed. Smooth reference signals for rotor speed and rotor ‡ux modulus are required to be tracked exponentially and globally. Only semiglobal solutions have been recently obtained in the literature. A global solution is presented for current-fed induction motors which makes use of a novel rotor...

In the presented paper, a sensorless driver circuit is designed, constructed and tested to control two types of three-phase Switched Reluctance Motor (SRM). The presented control algorithm has three steps. In the first step, the SRM is controlled by an open-loop method. In the second step, mathematical model of the SRM phase, motor parameters and flux-current-rotor position relation are used in...