resonant transformer造句

• A physical system can have as many resonant transformers can have two resonant frequencies.
• A Tesla coil is a type of resonant transformer circuit invented by Nikola Tesla around 1891.
• Resonant transformers are also used in electronic ballasts for fluorescent lamps, and high voltage power supplies.
• In 1891, Nikola Tesla invented the Tesla coil, an air-cored, dual-tuned resonant transformer for producing very high voltages at high frequency.
• Ferro-resonant units operate in the same way as a standby UPS unit; however, they are online with the exception that a ferro-resonant transformer is used to filter the output.
• Unlike the multiple-layer secondary of a non-resonant transformer, coils for this purpose are often single layer solenoids ( to minimise skin effect and give improved " Q " ) in parallel with a suitable capacitor, or they may be other shapes such as wave-wound litz wire.
• That frequency is usually chosen in small AM radios because it is a fair compromise between 1 ) ease of constructing high-Q resonant transformers in the radio IF amplifier; 2 ) high enough for acceptable image frequency rejection by the radio front-end tuned amplifier; 3 ) by being a " de-facto " standard there should be no strong transmissions at 455 kHz and components are standardised e . g . fixed-frequency ceramic filters are now often used instead of wound coils.