jännitelähdeinvertterit

A jännitelähdeinvertteri, known in English as a voltage source inverter (VSI), is a type of inverter that converts direct current (DC) power into alternating current (AC) power. The key characteristic of a VSI is that its output voltage is actively controlled, meaning it can produce a desired AC voltage waveform with a specified magnitude and frequency. This is typically achieved by rapidly switching semiconductor devices like insulated-gate bipolar transistors (IGBTs) or metal-oxide-semiconductor field-effect transistors (MOSFETs) to create a synthesized AC waveform from the DC input.

VSIs are widely used in various applications due to their ability to provide a clean and controllable AC output. Common uses include variable-speed motor drives for industrial machinery, electric vehicles, and renewable energy systems such as solar and wind power inverters. They are also employed in uninterruptible power supplies (UPS) to provide backup power during outages and in high-voltage direct current (HVDC) transmission systems for grid interconnection. The control strategies for VSIs, such as pulse-width modulation (PWM), are crucial for generating the desired AC output and minimizing harmonic distortion. Different PWM techniques allow for optimization of efficiency, harmonic content, and control range.