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AC-AC converter for railway engines - has shunting thyristors preventing creation of harmonics in supply circuit during switching
AC-AC converter for railway engines - has shunting thyristors preventing creation of harmonics in supply circuit during switching
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机译：铁路发动机的AC-AC转换器-具有并联晶闸管，可防止在切换期间在电源电路中产生谐波
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摘要
The matching circuit for the DC intermediate stage of an AC to AC converter includes a T-shaped cell (4) whose vertical branch includes a free-wheeling thyristor (18). The horizontal branch includes an inductance (16) whose value is equal to the total inductance of the motors (1) driven by the AC output of the converter. An additional thyristor is connected to shunt the inductance to suppress its effect during switching of thyristors in the output convertor. The circuit is intended to prevent the formation of variable frequency harmonics in the power supply network during switching of thyristors in the static converter. It may be used in a circuit supplying power to the motor of a railway engine, preventing the formation of harmonics in the supply which are difficult to remove by filtering.
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