Pulse-width modulation method for a frequency converter

Details Pulse-width modulation method for a frequency converter Pulse-width modulation method for a frequency converter

2007-03-13

2007-03-13

Patel, Rajnikant B. (Department: 2838)

Electric power conversion systems

Current conversion

Using semiconductor-type converter

C363S098000, C363S069000, C318S768000, C318S800000

Reexamination Certificate

active

10925967

ABSTRACT:
A space-vector pulse-width modulation method for a frequency converter provided with a voltage intermediate circuit, said frequency converter comprising a mains bridge (10) to be connected to an alternating current source (UU, UV, UW), a direct-voltage intermediate circuit and a controlled load bridge (11) for supplying a variable-frequency alternating voltage (US, UR, UT) to a load (12), and in which method the modulator performing the modulation is given a reference. The load bridge modulator is given a reference consisting of the references for the flux linkage changes produced by the voltage vectors, the flux linkage change is calculated on the basis of measured intermediate-circuit voltage, and the currently active voltage vector is kept turned on until the reference value is reached.

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