How Many Categories Can Solar Inverters Be Divided into According to Input Source and Output Phase?

Solar inverters can be divided into the following main categories according to the input source, output phase, and commutation technology of the application.

Solar inverters are divided by the input source:

Voltage Source Inverter

When the input of the inverter is a constant DC voltage source, the inverter is called a voltage source inverter. The input of the voltage source inverter has a hard DC voltage source with zero impedance. In fact, the impedance of the DC voltage source is negligible.

Current Source Inverter

When the input of the inverter is a constant DC current source, the inverter is called a current source inverter. Hard current is brought to the CSI from the DC power supply, where the DC power supply has a high impedance.

Solar inverters are divided by the output phase:

Single Phase Inverter

A single-phase inverter converts a DC input to a single-phase output. The output voltage/current of the single-phase inverter is only one phase, and its standard frequency is the nominal voltage of 50Hz or 60Hz.

Three-phase inverter

A three-phase inverter converts direct current to three-phase power. The three-phase power supply brings three-way alternating current that intersects and strips evenly. All three waves occurring at the output are of the same amplitude and frequency, but shifted slightly by the load, and each wave is 120 degrees out of phase with each other.

Solar inverters are divided by commutation technology:

Route commutation

In this type of inverter, the voltage of the AC circuit is available from the device and the components are turned off when the current in the SCR experiences zero characteristic. Such a commutation process is called line commutation, and an inverter operating according to this method is called a line commutation inverter.

Forced commutation

In this type of commutation, the power supply does not create a zero. This is the factor why many external resources are required to rectify the device. Such a commutation process is called forced commutation, and an inverter according to this process is called a forced commutation inverter.