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Direct matrix Converter is considered as a powerful tool for AC/AC power conversion providing AC output voltage and frequency control It also has many features such as a bidirectional power flow, a compact size and a direct conversion capability In this paper, matrix converter is used to convert a five phase input voltage into three phase output voltage with controlling output current amplitude and...
This paper proposes an improved sensorless matrix-converter IPMSM drive system using a high frequency injection method. By suitably choosing different virtual dc-bus voltages and compensating the duty cycle of the switching states, the estimated position error can be obviously reduced. A 32-bit digital signal processor, TMS-320LF-2407A, is used to execute the rotor position estimation and the whole...
This paper presents an optimum speed control system for wind energy generation systems equipped with Doubly Fed Induction Generators (DFIG) and Matrix Converters (MC). The MC controls the rotor currents and guarantees the optimum speed of the generator necessary to extract the maximum energy from the wind (MPPT-Maximum Power Point Tracking). The Stator Flux Oriented Control (SFOC), together with the...
This paper proposes a new direct power control (DPC) strategy of doubly-fed induction generator (DFIG) using matrix converters (MCs). In this method many advantages of MC such as lack of bulky dc-link capacitor are used and also grid side converter controller is emitted. Due to higher number of output voltage vectors in MCs in comparison with VSIs, input power factor of MC (grid side) is controlled...
Indirect matrix converter has a real DC link, but does not contain large DC link energy storage capacitors compared with conventional PWM converters. Combined with the advantages of indirect matrix converter, AC-excited generation technique and vector control scheme, the system of the doubly-fed wind power generation excited by indirect matrix converter is established. The indirect matrix converter...
This paper presents the analysis and operation of doubly fed induction generator (DFIG) excited by two-stage matrix converter under unbalanced network voltage conditions. Two-stage matrix converter has a real DC link, but does not contain large DC link energy storage capacitors compared with conventional PWM converters. Therefore, output current waveform will be directly affected when the grid side...
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