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What is a DC to AC Converter?

10/1/2013 11:53:18 AM | by Anonymous

Converters: Dc To Ac

The conversion between direct current and alternating current requires an inverter. The DC to AC converter switches the direct current to and fro between the positive and negative values. This is usually conducted by a circuit known as the oscillator. The two main classes of DC to AC converters are different. They are based on whether the output is a pure sine wave or a modified square dependent on the complexity of the oscillator circuit. A DC to AC converter can be used to power up electronic devices using batteries found in recreational vehicles, boats, automobiles, solar panels and from other sources.


The difference between the two currents is that the electrons moving in the DC circuit moves in only one direction. Unlike those in AC circuits, they flow in a periodically reverse manner. This can be monitored by testing the circuit voltage. A DC circuit will present a positive constant voltage if all the leads are correctly hooked up. However, an AC circuit will cycle between the positive and negative voltage. When being viewed through an oscilloscope or a similar device, the alternating current that is available will appear as a sine wave from the power grid.


The DC to AC voltage converter functions by switching the direct current back and forth in order to approximate a sine wave. Through the various solid states of designs that have been created, the oscillator circuits that were used to achieve were all once mechanical in nature. Simple converters create a type of modified square wave. It involves the voltage to stay positive for a time before dropping directly to zero and then moving in a straight line to negative voltage and back again. Square wave AC power is sufficient for many devices to use. Though in some cases, a purer waveform might be necessary. Pure sine wave inverters are relatively more expensive types of DC to AC converter. They use additional control circuitry to estimate the sine waves seen in the grid power.


Direct current can be very useful but the batteries generally only provide relatively low voltage DC power. Many devices would require more power to function than what the DC can provide. They are typically designed to run on 120 volt AC power supplies. Alternating current constantly changes its polarity and sends current one way through the entire circuit. They are then reversed and sent in the other way. This is being conducted very quickly almost sixty times in a second. AC works well at high voltages and they can be “stepped up” by a transformer more easily than a DC.


Ironically, if the AC is used to power the computer or television, power supply is converting 120 volt AC into a much lower voltage DC. The electronic circuits in these devices require low voltages in order to function. Thus, the DC is being converted to AC in order for it to be changed back into DC again. DC cannot be used directly without the converter due to the power supply needs the AC power would need in order to step down and regulate the voltage.


DC to AC converters will also typically use transformers and various control circuits to generate desirable level of voltage and current to power up a device. Smaller converters are also available. They can be plugged into the cigarette lighter in a car that typically provides limited amount of watts. The power output also tends to be limited by the input circuit. Converters that are placed to use with solar panel installations can power up the entire house. Pure sine wave models are then often used to tie the systems into the grid power.

 

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