Home > Do you know DC AC Power Inverter?

Do you know DC AC Power Inverter?

Now we will tell you the Guide of DC AC Power inverter.

Most standard appliances are designed to accept only AC (alternating current) voltages because that's how electricity is supplied from the grid. To run an electronic device from a DC (direct current) voltage source you obviously need to transform DC into AC.

Power inverter is a device that converts electrical energy from DC form to AC form using electronic circuits. Its typical application is to convert a 12V battery voltage into conventional household voltage. Inverters are used in a wide variety of applications from small car adapters to large grid-tie systems that can supply AC power to the entire house. There are three basic types of dc-ac converters: square wave, modified sinewave, and pure sine wave (see the diagram below). The square wave is the simplest and cheapest type, but nowadays it is practically not used commercially because of low power quality. The modified sine wave topologies (which are actually modified square waves) provide square waves with some dead spots between positive and negative half-cycles. They are suitable for many electronic loads, although their THD is about 25%. Priced in the range of $.05-$0.10 per watt, modified sinewave models are the most popular low-cost inverters on the consumer market today, particularly among car inverters. If you are buying a model whose description does not state that it is a pure sinewave type, then most likely it is a modified one. Note that output voltage waveform in conventional modified sinewave DC-AC circuits has only two levels: zero or peak voltage of both polarities. By adding another voltage level, a designer can reduce THD typically from 25% to 6.5%. Periodically connecting the output to a specific voltage level with proper timing can produce a multiple-level waveform which is closer to sinusoidal than conventional modified sinewave.

A sinewave inverter produces output with low total harmonic distortion (normally below 3%). It is the most expensive type of AC power source, which is used when there is a need for clean sinusoidal output for some sensitive devices such as medical equipment, laser printers, stereos, etc.