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shunt active power filtering for smart appliances
shunt active power filtering for smart appliances

... Continuous distorted load currents increase transformer losses and hence contribute to general temperature rise and potential local hotspots. Further, current harmonics cause additional copper losses in all equipment. These additional losses raise the transformer (and other equipment) temperatures a ...
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... Although this control method can directly control the LED current and current accuracy under any condition, it requires additional secondary-side components—including a sensing circuit, comparison and compensation circuits, an opto-coupler, and bias power supplies—that significantly increase system ...
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introduction to dc machines

... •The magnetization curve of a series DC generator looks very much like the magnetization curve of any other generator. At no load, however, there is no field current, so VT is reduced to a very small level given by the residual flux in the machine. As the load increases, the field current rises, so ...
UC29431 数据资料 dataSheet 下载
UC29431 数据资料 dataSheet 下载

... and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’s te ...
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... transformer be connected to earth ground. In the United States, for example: The National Electrical Code® requires (section 250.20) grounding transformers for AC systems of less than 50 volts if the primary voltage exceeds 150 volts to ground or if the main transformer supplying power to the buildi ...
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Study of Recent Charge Pump Circuits in Phase Locked Loop

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Power MOSFET Basics: Understanding Gate Charge and Using it to

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ICS552-02 L S 2 I

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... Plug-in hybrid electric vehicles (PHEVs) are usually driven in all-electric mode for the initial driving range by using the electrical energy stored in the on-board battery (Amjadi and Williamson, 2010; Electric Power Research Institute, 2007). Most of PHEVs are capable of 40 miles electric driving ...
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Islanding

Islanding refers to the condition in which a distributed generator (DG) continues to power a location even though electrical grid power from the electric utility is no longer present. Islanding can be dangerous to utility workers, who may not realize that a circuit is still powered, and it may prevent automatic re-connection of devices. For that reason, distributed generators must detect islanding and immediately stop producing power; this is referred to as anti-islanding.The common example of islanding is a grid supply line that has solar panels attached to it. In the case of a blackout, the solar panels will continue to deliver power as long as irradiance is sufficient. In this case, the supply line becomes an ""island"" with power surrounded by a ""sea"" of unpowered lines. For this reason, solar inverters that are designed to supply power to the grid are generally required to have some sort of automatic anti-islanding circuitry in them.In intentional islanding, the generator disconnects from the grid, and forces the distributed generator to power the local circuit. This is often used as a power backup system for buildings that normally sell their excess power to the grid.
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