Industrial Automatic Control Systems and Controllers Annotation << Back Synthesis of Sensorless Control System for an Asynchronous Motor V.I. Domanov, A.V. Domanov, A.I. Bilalova Synthesis of the main links and the system as a whole is given. The work of various types of voltage regulators is analyzed and the advantages of the proposed transistor variant are substantiated. The equation of the mechanical characteristic for such control is obtained. The dependences of the critical moment on the magnitude of the control signal and the shunting resistance are given. The equations of the generalized machine are derived, on the basis of which the circuit of the torque calculator is formed. The structure of an asynchronous motor designed for control on the working part of the characteristic under scalar control is considered. On its basis, using the torque calculator, a scheme is created for the observer of the speed of an induction motor. Equations for calculating the links of this scheme are given. Formed feedback signals are used to build the structure of subordinate regulation. Expressions are given for the calculation of regulators and the system as a whole. Keywords: voltage regulator; critical moment; torque calculator; generalized machine; speed monitor; subordinate control; regulator; sensorless system. Contacts: E-mail: andrew.domanov@gmail.com, E-mail: bilalova_alisa@mail.ru Pp. 03-09.