Abstract
A successful application of vector control is subject to knowing the position of the rotor and, in synchronous machines, the knowledge of the initial position for a problem-free startup. The ability to read rotor position and perform the vector control algorithm without a position sensor is typically referred to as sensorless vector control. Traditional feedback from the rotor position sensor, or the sensor of mechanical angular velocity of the motor, is typically replaced with a computational block or an algorithm that uses the measured voltage and current to indicate the actual position of the motor. The article presents a sensorless control of the permanent magnet synchronous motor using an injection of high frequency voltage for rotor position estimation. DOI: http://dx.doi.org/10.5755/j01.eee.19.6.1583
Highlights
Permanent magnet synchronous motors are deployed in applications that are the most demanding in terms of dynamics
This paper looks into a method of assessing the position of a PMSM rotor with injection of continuous, highfrequency voltage signal
As the sensorless PMSM drive with injection methods and with vector-oriented control is rather a complex system, it is suitable that the entire system be verified in a computer simulation after theoretical preparation and before the realization
Summary
Permanent magnet synchronous motors are deployed in applications that are the most demanding in terms of dynamics. Most of the proposed methods of estimating the position of the rotor, or the mechanical angular velocity, are based on the measurement and processing of the basic parameters of the stator, i.e. stator current and voltage, to discover the amplitude and orientation of the magnetic flux in the machine. The monitoring of magnetic saliency projected in the variation of stator inductance uses measurement of response to additional voltage or current signal, the frequency of which is higher than the frequency on the supply. The study of magnetic saliency to estimate the position or velocity of the rotor by injection of signal with higher frequency has been the subject of global scientific research for several years. Two basic injection methods for getting information on the position of magnetic saliency ( the position of the rotor) of PMSM are known to date.
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