Photovoltaic inverter module igbt

How do IGBTs work in a PV inverter?

During operation inside a PV inverter, IGBTs are subject to AC stress conditions as opposed to DC stress conditions. This typically consists of a 60 Hz on-off cycle, with a Pulse-Width-Modulated (PWM) signal on the order of 10 – 15 kHz superimposed on the lower-frequency cycle.

How does the IGBT case temperature affect a photovoltaic inverter?

As a result, the IGBT case temperature will respond rapidly to a temperature swing by changing of load conditions. That means on days with fluctuating wind conditions the IGBT module baseplate will experience many thermal cycles. Also photovoltaic inverters experience at minimum one huge thermal cycle per day.

Do IGBT modules experience thermal cycling in high power industrial drive applications?

IGBT modules in high power industrial drive applications experience thermal cycling in case of fluctuating (or non-continuous) loads. Wind power converters are usually liquid-cooled with the cooler having a thermal time constant of a couple of seconds.

What is IGBT module?

Fuji Electric’s IGBT Module (or insulated-gate bipolar transistor) is a high-performance 7th generation IGBT/FWD chipset with a compact design that provides for greater power output. It has environmentally friendly modules with easy assemblage, solder-free options, and RoHS compliance.

Are insulated-gate bipolar transistors a good choice for solar inverter applications?

For solar inverter applications, it is well known that insulated-gate bipolar transistors (IGBTs) ofer benefits compared to other types of power devices, like high-current-carrying capability, gate control using voltage instead of current and the ability to match the co-pack diode with the IGBT.

What are IGBT inverter turn-on switching characteristics?

The IGBT inverter turn-on switching characteristics include improved noise-loss trade-off, reduced turn-on dv/dt, and excellent turn-on dic/dt. Turn-off switching characteristics include soft switching behavior and turn-off oscillation free.