Abstract
The most common control system for a synchronous motor with permanent magnets is a vector control system. The construction of such a system has a number of difficulties, one of them is the need to have information about the current position of the rotor. Data on the position of the rotor can be obtained using sensors, or include a supervisor in the control system. The article describes an adaptive observer of the position and speed of the rotor of a synchronous motor with permanent magnets. This observer is used in the system of sensorless vector control of the electric drive. The presented version of the observer of the engine state is realized by creating a model in the Matlab Simulink software package. The results of experimental verification of the presented observer at the stand with the use of an engine with a power of 200 W are shown. The aim of the work is to develop an observer that is stable to changing drive parameters. This is achieved by using a relay unit in the view of the observer, which implements the slip mode.
Highlights
At present, non-sensor systems of the electric drive are widespread, in which the measurement of the position of the rotor is performed using special analytical algorithms [15]
Without-sensor control systems of the electric drive can increase the reliability of the drives due to the failure of the signal lines
Observers are required to be resistant to noise in the measuring channels, to provide a wide range of speed control and a low dependence of the calculation results of the position angle and the rotor speed on the drift of the engine parameters [6-12]
Summary
Non-sensor systems of the electric drive are widespread, in which the measurement of the position of the rotor is performed using special analytical algorithms [15]. Without-sensor control systems of the electric drive can increase the reliability of the drives due to the failure of the signal lines. Determination of the position of the rotor is based on data from sensors that measure currents and voltages in the lines supplying the motor. The observer is a mathematical model of the engine, the input data of which are stator motor currents. Observers are required to be resistant to noise in the measuring channels, to provide a wide range of speed control and a low dependence of the calculation results of the position angle and the rotor speed on the drift of the engine parameters [6-12]. The observer's task is to calculate the position of the back-EMF vector
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