Inverter Basic Circuit

Inverter is an electronic device used to convert DC voltage (Direct Current) into AC voltage (Alternating Curent). The output of an inverter can be an AC voltage with a sine wave form, square wave and sine wave modified. The input voltage source of the inverter can use battery, solar power, or other DC voltage source. Inverters in the process of converting DC tension into AC voltage require a step up transformer step up transformer.

There are two main types of inverters. The output of the modified sine wave inverter is similar to the square wave output except that the output goes to zero volts for a while before switching positive or negative. This is a simple and low cost (~ $ 0.10USD / Watt) and is compatible With most electronic devices, except for sensitive or specialized equipment, for example for certain laser printers.

A pure sine wave inverter produces nearly perfect sine wave output (<3% of total harmonic distortion) which is essentially the same as the power of the utility network provided. So it is compatible with all electronic AC devices. It is the type used in grid-tie inverters. The design is more complex, and costs 5 or 10 times more per unit of power (~ $ 0.50 to $ 1.00USD / Watt).

High power electric inverter of electronic oscillator. This is so named because the early mechanical AC for the DC converter is made to work in reverse, and thus is “upside down”, to convert DC to AC.

Type – Type DC Inverter To AC
Based on the number of inverter output phases can be distinguished in:

1. Inverter 1 phase, ie inverter with 1 phase output.
2. 3 phase inverter, ie inverter with 3 phase output.

Inverter can also be distinguished by the way its voltage settings, namely:

1. Voltage Fed Inverter (VFI) is an inverter with a constant set input voltage
2. Current Fed Inverter (CFI) is an inverter with a constantly regulated input current
3. Variable dc linked inverter is an inverter with adjustable input voltage. Based on its output waveform the inverter can be divided into:

1. Sine wave inverter, ie an inverter that has an output voltage with a pure sine waveform. This type of inverter can provide supply voltage to the load (Inductor) or electric motor with good power efficiency.

2. Sine wave modified inverter, ie an inverter with a square wave output voltage modified to resemble a sine wave. This type of inverter has a low power efficiency when used to supply inductor loads or electric motors. Square wave inverter, inverter with box-shaped output, this type of inverter can not be used to supply voltage to inductive load or electric motor.