Cree Photovoltaic Inverter Scale

Can SiC diodes improve PV inverter efficiency?

Future work is planned to improve the EU and CEC weighted efficiency to >98.5%, such as reported for high cost PV inverter prototypes that use SiC MOSFET and SiC diode power devices [20, 21]. The planned efficiency improvements are achievable by pairing the SiC diodes with IGBTs that are optimised for high-speed switching.

What is a sic PV inverter?

SiC devices are the preferred devices to replace Si devices in these converters. Some demonstrations of SiC PV inverters have revealed that the application of SiC devices is a double-edged sword. Many technical challenges should be overcome to benefit from the excellent performances of SiC device.

How much power can a Si based PV inverter produce?

Nowadays, for commonly used Si-based PV inverter, the rated power capacity ranges from several watts to hundreds of kilowatts. The typical topologies can be classified into three categories, namely, low-frequency isolated, high-frequency isolated, and non-isolated.

Why is a high-capacity sic module needed for PV inverter application?

A high-capacity SiC module is needed for PV inverter application. However, limited by the high cost, the current rating of a SiC bare die chip is limited. A SiC module is paralleled by multiple chips. The multi-chip is a general solution for SiC module when its rated current is higher than 400 A.

What are SiC-based devices used to improve PV inverter performance?

Recently, silicon carbide (SiC)-based devices are used to improve the performance of PV inverters . The prices of SiC diode and metal–oxide–semiconductor field-effect transistor (MOSFETs) decrease by 10% per year. These SiC devices are replacing Si devices for PV inverter applications.

How to improve power density of a PV inverter?

The high-temperature operation capability of a SiC device is needed to improve the power density of the PV inverter. A high-temperature package should be carefully investigated. In addition, the fast switching capability of a SiC device requires low parasitic inductance package.