The pulse-width modulation voltage source inverters arc most commonly applied in frequency converters that arc used for supplying AC motors. At present, the importance of the so-called sensorless control of AC drives is growing. More common sensorless methods are methods working with the mathematical models of machines. The mathematical models of the AC motor that are used in scnsorless control methods with different types of observers and estimators require knowledge of stator currents and voltages. The paper describes a model of the voltage source inverter with the possibilities of the compensation non-linear effects such as dead-time and the voltage drop on a power switching device.
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