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Since late 1990s multiphase drives have become a serious alternative to three-phase drives in some particular applications such as electric ship propulsion, locomotive traction, electric vehicles and high power industrial applications. Nowadays the research activity is focused on the development of control strategies that can exploit the degrees of freedom that exist in multiphase machines. As known,...
A new space vector modulation (SVM) technique having a full and independent control of the multiple voltage space vectors of a six-phase voltage source inverter is presented in this paper. The proposed space vector approach is based on three-phase decomposition, leading to the modulation of two three-phase VSIs. The six-phase load consists in a dual three-phase induction motor, with insulated neutral...
Multiphase motor drives are a very promising technology, especially for medium and high power ranges. As known, a multiphase motor drive cannot be analyzed using the space vector representation in a single d-q plane, but it is necessary to introduce multiple d-q planes. So far a general space vector modulation for multiphase inverters is not available due to the inherent difficulty of synthesizing...
Nowadays, there is an increasing attention towards multiphase drives, especially for medium and high power applications in naval and railway propulsion systems. As known, a multiphase motor drive cannot be analyzed using the space vector representation in a single d-q plane, but it is necessary to introduce multiple d-q planes.
A new space vector modulation (SVM) technique having a full and independent control of the multiple voltage space vectors of a nine-phase voltage source inverter (VSI) is presented in this paper. The proposed approach is based on the concept of system decomposition, leading to the modulation of three three-phase VSIs. The resulting SVM corresponds to standard SVM for each three-phase VSI in the case...
In this paper the problem of the modulation strategy of a multi-phase voltage source inverter for high performance motor drives is completely solved using the duty- cycle space vector approach, which combines the multiple space vector representation, useful in modeling and controlling multiphase machines, with traditional carrier-based pulse width modulation principle, suitable for multi-phase inverters...
A generalized multi-phase space vector theory is considered for developing the space vector modulation of a nine-phase voltage source inverter (VSI). The space vector modulation (SVM) is based on the control of the voltage vector in the first d-q plane, imposing to be zero the voltage vectors in second, third, and fourth d-q planes, as in the relevant case of balanced sinusoidal load voltages. The...
A generalized multi-phase space vector theory is considered for developing the space vector modulation of a seven-phase voltage source inverter. The modulation is based on the control of the voltage vector in the first d-q plane, imposing to be zero the voltage vectors in both the second and the third d-q planes. The proposed switching pattern includes one-leg commutation at a time, with the possibility...
In this paper the problem of the modulation strategy of a cascaded three-level inverter is solved using the duty-cycle space vector approach, which is based on the space vector representation of the switch state. This approach simplifies the study of the modulation strategies and leads to a general solution of the problem, providing an intuitive graphical representation of the modulation properties...
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