I Need a 30V, 1A Transformer for Designing a Dc Power Supply. Can I Use a 30V, 5A Transformer for th

I need a 30V, 1A transformer for designing a dc power supply. Can I use a 30V, 5A transformer for the purpose?

Yes. It will simpy be bigger and heavier than it needs to be. But at least it wo not overheat so easily if you happen to draw a bit more current than the design suggests.

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A nearly horizontal dc power line on the equator carries a current of 1000A directly westward. If the Earth's?

i am particularly looking forward to this Ashes sequence and even have not thoroughly written the Aussies off. on the different hand England ought to pass into the sequence as overwhelming favourites because of modern form and the very shown fact that the sequence is being performed in England. I reckon Chris Rogers may be somewhat a gloomy horse as he knows the circumstances over here fantastically lots. sturdy to verify some friendly banter flying around between the two instruments of supporters too!

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Design a dc power supply to meet a set of specifications below!!!Please help!?

confident, whether that's a bad regulator. that's barely used for a distinction of Vin - Vout

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i need help in answering the question below about AC and DC power supplies.Plz help.answer needed fast.?

There are voltage rectifiers in these DC-only devices that convert pure (alternative polarity) AC to single polarity AC, which is then converted into DC by the use of smoothing/filter capacitors

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Where to find a 9v DC power thing?

Any electronics store in the world?

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Automatically switching load from DC power to AC power?

sophisticated factor. search using yahoo or google. it might help!

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Interpretation of EN 61000-4-5 Surge requirement on a DC Power Port

Said that, if you equipment is powered from a DC power supply placed within a few meters (precisely within $3$ meters of cable, but I can possibly remember a wrong value) from it, the three events above are considered as very low probability events to happen on the DC power input: the DC port is thus considered as a signal port.

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I want to produce a high voltage from a 9 volt dc power source to make ion wind, someone said modeulate the...

I would not bother to try, for the first part of this, second, the effort is not going to work anyway because of the DC to DC inverters that you will need to use. A 9 volt power source, even if it could supply 1000 amps is not going to do much of anything to produce ions. You need to understand that ionization requires high voltage. 9 volts just is not high voltage for much of anything in ionization. The inverters operate by taking your 9 volts, converting it to a high frequency signal, passing that through a transformer, rectifying it, and most likely using a diode/capacitor voltage multiplier to produce the desired high voltage. Modulating your 9 volts just is not going to get through the inverter. Once you have sufficient ionization happening, the changes created in the air stream by the ionization of the air will tend to create a naturally occurring movement anyway. How much of a movement is going to depend on the amount of ionization produced. That will depend on how many ionization needles are being employed, the voltage used, and the available current from the high voltage generators. If you are looking for a breeze that can be easily felt, I think you need to forget it, unless you have several hundreds of thousands of dollars to invest, as well as appropriate government approval. The level of ionization needed to create a sustainable, and readily felt ion wind is going to take a lot of energy and that, is going to be quite dangerous. The voltage, and current needed to obtain what you might be after will be large enough to jump from where they are supposed to be, to you, or anyone, or anything else and would tend to do damage, or to kill. I would advise a lot of caution.

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How to Design More Efficient AC / DC Power Supply
Power is like an insurance policy - you know you need it, but you'd rather never use it. Similarly, your next generation of electronic products are inseparable from the power supply. On the other hand, the power supply is different from the insurance policy, because in the past 20 years, the insurance policy has been increasing the price, while the power supply is getting smaller and smaller, the power is getting higher and higher, and the cost is getting lower and lower. The trend of reducing the size of the power supply to allow more space for other functions of the system will continue. Moreover, the power supply must comply with the existing standard format to avoid system redesign.For AC / DC "target ="_ blank "> for AC / DC power supply, what drives this trend is not a new breakthrough in technology, but good design and innovative combination of the advantages of various processes and technologies to develop power supply with higher than average performance. This paper will discuss the common 100w-200w AC / DC power supply design, which focuses on the combination of various schemes to design the power supply with the smallest shape and the lowest cost, and achieve the highest efficiency and application flexibility.Let's first talk about several main objectives of design. First, the power supply must be as small as possible to leave more space for other functions of the system. Second, the higher the efficiency of the power supply, the better. In practice, the power supply is not the most energy consuming, but the microprocessor, but the power supply still needs to further improve its efficiency, because the higher the efficiency, the smaller the heat sink required, so as to further save system space. For 100w-200w power supply, it is unrealistic to achieve 90% efficiency. For every 1% increase in the efficiency of high-power power supply, the heat can be reduced by 10%, and the cooling degree required by the power supply will be greatly different. Third, of course, cost is always the most important factor, whether in terms of raw material cost or manufacturing complexity. Simple design is an important factor. Finally, consider functionality. Control and alarm signals, current sharing with similar equipment and maintaining stable performance under various AC input conditions are very important.Let's take a look at the AC / DC power supply shown in Figure 1 below. Several methods here can minimize the size and cost on the premise of ensuring performance and function.Figure 1: steps to reduce the shape of AC / DC power supplyInput filter. Using a two-order filter can minimize the power supply shape and achieve high common mode and differential noise reduction. If you stack components vertically, you can save board space and improve cooling.Power factor correction circuit (PFC). As the price of silicon carbide diode has decreased in the past two years, it has become possible to use this product in power supply. Because of the reverse current characteristic, the silicon carbide diode does not need a buffer circuit, so 5-6 components can be saved. In addition, silicon carbide diodes can generally improve the efficiency by 1%. If a step sensor is used, it can provide high sensing at high input lines and support the most possible flow density at low input lines. Using continuous induction mode (CCM) operation in the input range can maintain minimum peak conversion current and input filter requirements.Main converter. Here, the switching loss can be basically eliminated by using the resonant topology. This not only improves the efficiency of the power supply, but also enables the power supply to use smaller heat sinks. In practical use, sometimes ceramic substrates can be used instead of metal substrates in power transistors. Ceramic substrates can reduce noise and therefore simplify the filtering process. This is because the heat sink has no capacitance coupled with the loss of switching MOSFETs. In addition, the creepage distance when using ceramic heat sink is shorter than that required by metal heat sink, which further saves board space.Output rectifier. Here, switching MOSFETs are used instead of output rectifier diodes for synchronous rectification. This can greatly reduce power consumption and improve efficiency. For example, a diode with a forward voltage of 0.5V consumes 10W at 20A. If a MOSFET with an on resistance of 14mohm is used, the maximum power consumption is only 5.6W, which is 44% less than that of the diode. Here, a ceramic substrate can also be used to replace the traditional heat sink.Control circuit. Semiconductor manufacturers have recently been developing integrated control circuits for power supplies. This can reduce the number of components, reduce manufacturing costs and save board space, even if the integrated circuit itself may be more expensive than discrete components. For example, IR1150 - this is a PFC chip. It is used as a single cycle control (OCC) device, which can greatly reduce the number of components while maintaining the performance of the power system. Similarly, the main converter voltage control, over-current protection, over-voltage protection and over-temperature protection can be carried out through the special application chip, and the output rectifier conversion can be controlled. In addition, the application flexibility can be improved through control channels such as synchronous single start sub source, suppression circuit to turn off the power supply with the help of logic control, "power state good" signal, standby converter control function and so on. When AC power is present, the standby converter can provide 5V output separately.
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How to Design More Efficient AC / DC Power Supply
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