| 摘要 |
<p>1,137,266. Transformers, rectifier assemblies. WESTINGHOUSE ELECTRIC CORP. 10 Oct., 1966 [20 Oct., 1965], No. 45183/66. Headings H1K and H1T. [Also in Division H2] In a high voltage converter series connected semi-conductor devices are arranged in groups such as 87, 124, within a tank 83 containing an insulating and cooling fluid such as sulphur hexafluoride and conducting screens shield the groups from the tank and from one another and increase the capacitance between the groups. If the devices are thyristors simultaneous firing pulses must be provided for all of them. The polythene insulated wire 98 acts as the primary of a control pulse transformer for each group. The wire 98 is coated with a paint of controlled resistivity to control the voltage gradient along it. The transformers have toroidal cones carrying a secondary winding for each thyristor.</p> |
