What is the inversion process of power inverter

The inversion process of a power inverter is a key step in converting direct current (DC) into alternating current (AC). This process involves precise control of semiconductor devices to produce the desired output waveform.

Input DC Power: The starting point of the inverter process is DC power from a DC power source (such as a battery, solar panel, etc.). The voltage and current characteristics of this DC power may vary depending on the application, but the inverter's job is to convert it into AC power for use by various electrical devices.

Switching device control: In power inverters, controllable switching devices such as transistors (MOSFET or IGBT) and triacs (SCRs) are usually used. These switching devices play a key role in the inverter's inversion process, adjusting the output waveform by controlling its on-off state.

Pulse Width Modulation (PWM): In order to control the shape of the output waveform, power inverters usually use pulse width modulation technology. In PWM, the inverter controls the amplitude and frequency of the output waveform by adjusting the on-off time ratio of the switching device according to the requirements of the output waveform. By periodically adjusting the width of the pulses, the inverter can simulate an output close to an ideal AC waveform.

Inversion process: Under the guidance of pulse width modulation, the switching device of the inverter switches periodically to change the direction of DC power, thereby forming an AC power with an approximate sinusoidal waveform. In this process, the switching devices switch at high frequencies, typically in the range of a few kilohertz to tens of kilohertz, depending on the inverter design and application.

Output filtering: The output waveform produced by the inverter may contain some harmonics and high-frequency noise. In order to purify the output waveform, power inverters are usually equipped with output filter circuits. This circuit helps remove undesirable components and ensures that the output waveform is stable and pure.

Output stage: The alternating current generated by the inverter process is guided to the output end of the inverter for use by connected loads (such as household appliances, motors, etc.). Inverters usually have adjustable output voltage and frequency to suit different application needs.