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  2. Low-noise block downconverter - Wikipedia

    en.wikipedia.org/wiki/Low-noise_block_downconverter

    The intermediate frequency band is much wider than in a conventional LNB, as the high and low band are not split up. Wideband LNB signals can be accepted by new wideband tuners, and by new SCR systems (e.g., Inverto/Fuba, [10] Unitron, [11] Optel, [12] GT-Sat/Astro), with or without optical transmission

  3. Frequency changer - Wikipedia

    en.wikipedia.org/wiki/Frequency_changer

    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 ...

  4. Cycloconverter - Wikipedia

    en.wikipedia.org/wiki/Cycloconverter

    Topology of blocking mode cycloconverter [1]. A cycloconverter (CCV) or a cycloinverter converts a constant amplitude, constant frequency AC waveform to another AC waveform of a lower frequency by synthesizing the output waveform from segments of the AC supply without an intermediate DC link (Dorf 1993, pp. 2241–2243 and Lander 1993, p. 181).

  5. Zellweger off-peak - Wikipedia

    en.wikipedia.org/wiki/Zellweger_off-peak

    Example capture: The bright line at 50 Hz is the power frequency, followed by odd harmonics at 150 Hz, 250 Hz and so on. The ripple being turned on and off is clearly visible at 1050 Hz. Originally time-clocks were used; however, they can easily lose accurate time and are not easily adjusted for daylight saving time. Before the amalgamation of ...

  6. Higashi-Shimizu Frequency Converter - Wikipedia

    en.wikipedia.org/wiki/Higashi-Shimizu_Frequency...

    The Higashi-Shimizu Frequency Converter Station is operated by Chubu Electric Power Co. and is located at 677-3 Tanakake, Hirose-aza, Shimizu-ku, Shizuoka. It is fed via a 275 kV power line and a 154 kV power line. Its inverters operate at 125 kVDC and have a maximum transmission rate of 300 MW.

  7. Block upconverter - Wikipedia

    en.wikipedia.org/wiki/Block_upconverter

    Older BUCs convert from a 70 MHz intermediate frequency (IF) to K u band or C band. Most BUCs use phase-locked loop local oscillators and require an external 10 MHz frequency reference to maintain the correct transmit frequency. BUCs used in remote locations are often 2 or 4 W in the K u band and 5 W in the C band.

  8. Phase converter - Wikipedia

    en.wikipedia.org/wiki/Phase_converter

    An American Rotary Phase Converter with a Transformer. A phase converter is a device that converts electric power provided as single phase to multiple phase or vice versa. The majority of phase converters are used to produce three-phase electric power from a single-phase source, thus allowing the operation of three-phase equipment at a site that only has single-phase electrical service.

  9. Chopper (electronics) - Wikipedia

    en.wikipedia.org/wiki/Chopper_(electronics)

    However, the current supplied to the load is discontinuous and may require smoothing or a high switching frequency to avoid undesirable effects. In signal processing circuits, use of a chopper stabilizes a system against drift of electronic components; the original signal can be recovered after amplification or other processing by a synchronous ...