H - Electricity – 02 – M
Patent
H - Electricity
02
M
318/120, 321/8
H02M 5/27 (2006.01)
Patent
CA 2037952
A method of controlling a cycloconverter, for supplying an AC power having a given frequency to a con- verter group having at least two cascade-connected con- verters and controlling a firing angle of each of the converters, thereby converting the AC power supplied to the converter group into an AC power having a predeter- mined frequency, includes the steps of controlling an output voltage from a converter in one stage of the con- verter group to obtain an AC output voltage including a synthetic voltage of an AC voltage having an amplitude equal to a difference between a maximum output voltage of the converter and a DC voltage and a predetermined DC voltage in accordance with the polarity of a reference voltage signal having a predetermined frequency, controlling an output voltage from a converter in the other stage of the converter to obtain an AC output voltage obtained by subtracting the output from of the converter in one stage from the reference voltage signal, and continuously varying a voltage value of the DC voltage in accordance with the frequency of the reference voltage signal.
Okayasu Masami
Tatara Shinji
Kabushiki Kaisha Toshiba
Marks & Clerk
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