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Catalog - Maalouf for General Electricity sarl
Catalog - Maalouf for General Electricity sarl

... Today ICAR produces different type of capacitors, from the lighting and single phase motor types to the ones for power electronics (electric traction, industrial services) and those of medium voltage. The various characteristics demanded to these products in terms of electric, mechanical and thermal ...
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... The MAX1733/MAX1734 use a proprietary, current-limited control scheme to ensure high-efficiency, fast transient response, and physically small external components. This control scheme is simple: when the output voltage is out of regulation, the error comparator begins a switching cycle by turning on ...
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... capacitor voltage balancing task [9]. Capacitor voltage balancing of an MMC does not have the limitations and complexities associated with other multilevel converters [16], [17]. However, it is mutually coupled with the circulating currents within each phase-leg of the MMC. Analysis of the circulati ...
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Obliteration of Harmonics on a VSI Fed Induction Motor Drive
Obliteration of Harmonics on a VSI Fed Induction Motor Drive

... converters has led to increase in harmonics hence it is essential to reduce the harmonics to improve power quality in the network which will also improve the performance of the machine connected to the power system network. Voltage source inverter fed three-phase induction motor drives have high 3n ...
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... ○Current mode PWM control Synthesizes a PWM control signal with a inductor current feedback loop added to the voltage feedback. ・PWM (Pulse Width Modulation) control The oscillation frequency for PWM is 1 MHz. SET signal form OSC turns ON a P-channel MOS FET (while a N-channel MOS FET is turned OFF) ...
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Spark-gap transmitter



A spark-gap transmitter is a device that generates radio frequency electromagnetic waves using a spark gap.Spark gap transmitters were the first devices to demonstrate practical radio transmission, and were the standard technology for the first three decades of radio (1887–1916). Later, more efficient transmitters were developed based on rotary machines like the high-speed Alexanderson alternators and the static Poulsen Arc generators.Most operators, however, still preferred spark transmitters because of their uncomplicated design and because the carrier stopped when the telegraph key was released, which let the operator ""listen through"" for a reply. With other types of transmitter, the carrier could not be controlled so easily, and they required elaborate measures to modulate the carrier and to prevent transmitter leakage from de-sensitizing the receiver. After WWI, greatly improved transmitters based on vacuum tubes became available, which overcame these problems, and by the late 1920s the only spark transmitters still in regular operation were ""legacy"" installations on naval vessels. Even when vacuum tube based transmitters had been installed, many vessels retained their crude but reliable spark transmitters as an emergency backup. However, by 1940, the technology was no longer used for communication. Use of the spark-gap transmitter led to many radio operators being nicknamed ""Sparks"" long after they ceased using spark transmitters. Even today, the German verb funken, literally, ""to spark,"" also means ""to send a radio message or signal.""
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