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ASTEC UM 1286 UHF modulator, top cover taken off. An RF modulator (radio frequency modulator) is an electronic device used to convert signals from devices such as media players, VCRs and game consoles to a format that can be handled by a device designed to receive a modulated RF input, such as a radio or television receiver.
A variable-frequency drive (VFD) is a type of frequency changer used for speed control of AC motors such as used for pumps and fans. The speed of a synchronous or induction AC motor is dependent on the frequency of the AC power supply, so changing frequency allows the motor speed to be changed. This allows fan or pump output to be varied to ...
The switching frequency can be 10 times lower than for AC motors. [3] The phases in an asymmetric bridge converter correspond to the motor phases. If both of the power switches on either side of the phase are turned on, then that corresponding phase is actuated. Once the current has risen above the set value, the switch turns off.
Aircraft radio modulator unit from the Second World War, showing a dynamotor (the black cylinder) which converts the aircraft's 24–28 V DC to 500 V DC for the transmitter. Dübendorf Museum of Military Aviation. A motor–generator (an MG set) is a device for converting electrical power to another form.
WASHINGTON (Reuters) -A U.S. federal appeals court on Friday upheld a law requiring Chinese-based ByteDance to divest its popular short video app TikTok in the United States by early next year or ...
(Reuters) -A U.S. appeals court on Friday held that a trial judge correctly found that American Airlines' now-scrapped U.S. Northeast partnership with JetBlue Airways violated federal antitrust ...
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Michigan is just 5-5 with two games to go in the regular season thanks largely to porous QB play. Three different players have started at QB for Michigan this season and they’ve combined to ...