A typical power inverter has some red and black DC terminals on the back end and we find some AC electrical outlets on the front end. This is due to the fact that there are two types of electricity, AC and DC. There is use of an inverter in converting DC or direct current into AC alternating current. In running household electric devices home power inverter provides uninterrupted power. These inverters are available for home in different voltage and load capacities. A DC source is connected to a transformer through the center tap of the primary winding in the basic design of the home inverter. In allowing current to flow back a switch is rapidly switched back and forth to the battery. Power in Inverter Peak power and Typical or Average power An inverter requires Peak or Surge power and Typical or Average (Usual) power. Peak power is the maximum power that an inverter can supply for shorter period of time. A startup peak power is required for some heavy current appliances like motor and refrigerator than they require when running. Typical power is the power that is provided by the inverter on a steady basis. Compared to the peak power this is usually much lower and is even used by power inverter manufacturer. In estimating the battery capacity typical power is useful. Power Rating of Inverter In different Size ratings from 50 VA up to 50000 VA there is availability of inverters. In household applications inverters larger than 11000 VA are seldom used. Maximum peak power or surge power and steady current supply are the first thing you need to consider about the true sine wave inverter system. The surge rating is specified at so many watts that to for so many seconds. This indicates that for a short time the inverter will handle an over load of that many watts. Between inverters and even within the same brand this surge capacity will considerably vary. In covering 99% of appliances usually 3-15 seconds surge rating is enough. Inverters that have lowest surge rating are the high speed electronic switching types. Follow us on Facebook
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There’s one thing that none of us can live without which is electricity: No matter whether you are living in an apartment building, a home in the suburbs, or that big, beautiful house on the hill weatherproof electrical box is a must. One of the major components required to deliver this electricity is the junction box that hangs on the side of practically every building in the country and it is the most often ignored thing. How to Make Connections Similarly about these outdoor applications there are obvious statements that can be said. These consist of the fiber optic termination boxes observed on the outside of large commercial facilities and schools, and at the ends of long cable run from our internet service providers (ISPs). As with the household electrical example just given, before being connected to splice trays for distribution to the consumer underground fiber optics cable containing dozens or perhaps hundreds of strands feeds into these junction boxes. Soon such connections even become more important. Over the coming years as 5G technology expands, to meet our population's demand for high-speed Internet and cellular communications these weatherproof gang box and other types of fiber infrastructure will become increasingly necessary. As we are discussing about the topic it is the best time to ask the same question about the electrical boxes and other fabricated enclosures just mentioned, basically about the materials used to make them. Nobody wants to see a big, ugly metal box hanging from the side of their house, so it is necessary that they look pleasant. Painting or powder coating them is the solution; still it adds expense and lead-time to the product. These finishes are durable. One alternative is stainless steel. It’s quite attractive and like low carbon steel it doesn’t corrode. However, it is relatively expensive and a not-insignificant factor with higher production volumes. Yes, for a custom server enclosure in a naval vessel or an outdoor electrical enclosure or weatherproof outlet box on a wind farm or solar energy installation stainless might make great sense, but it is cost-prohibitive for most residential and commercial uses. Follow us on Twitter In the ideal world, the metal enclosure would have been selected far earlier in the process. It is done in particular so that the size constraints of the PCB would be known. You can design the industrial electronic product and can specify the board components. It is basically prototyped, either on a development board to check functionality and performance or laid out on a final PCB design. It has been tested, tweaked, debugged, tested again, and finally signed off for production. Now what has to be done is to decide on the enclosure. Size The most fundamental questions asked are related to size like how big is the PCB? For direct vertical mounting various plastic enclosures have slots molded into the sides of the enclosure and for horizontal mounting the PCB mounting bosses are molded into the top and base. Material In case of metal enclosure for electronics, material choice is typically among plastic, aluminum, and GRP. ABS and polycarbonate are the most widely used plastic materials. The more stringent test the more is the vertical burn test. Aluminum enclosures are either die-casted or extruded. Both are robust and provide good impact resistance. These are intrinsically electrically conductive and to preserve continuity throughout the enclosure it should not be painted or anodized finishes must not cover mating areas. To significantly increase the surface area to improve heat dissipation some designs of extruded enclosures offer features such as multiple fins. Die-cast aluminum housings are strong and robust. They do not corrode, are electrically conductive. They even have an intrinsically high level of electromagnetic attenuation, and are easily machined. Environmental sealing to IP68 can be easily achieved with a suitable gasket fitted between the lid and the base. With relatively thin walls such enclosures can be cast, however compared to the equivalent sized plastic molded one they will always be far heavier. The die-cast enclosure is the ideal low-cost choice for applications where protection against shock damage is needed, for metal enclosure manufacturer and even for where EMC is likely to be an issue, or where there is expectation of the presence of high temperatures, dust, or water. Follow us on Facebook |
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Meba Electric Co., Ltd is a professional manufacturer and supplier of highly designed and premium quality electrical appliances. We always focused on developing our capacity and increasing the efficiency to compete in the current market. Archives
April 2024
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