Every year new applications based on DC-link voltage source converter are added. The power level is still increasing and more energy is stored in the DC-link. Even with the active protection, a high power IGBT still has a risk of exhibiting a violent rupture in the case of a fault. A possible solution is a fuse protection of the converter. From the failures analysis into a three-phase inverter, a DC-link location for fuses it might assure a protection against all faults. Experiments made with 400 A, 1200 V IGBT switches show that rupture can be avoided by use of high-speed fuse protection. The problem of adding inductance of existing High-Speedand proposed Typower fuses in DC-link circuit is treated. Then, some considerations about current distribution, spectral analysis of currents and harmonic power loss prediction in dc-link fuses are discussed when high-frequency components are present in the current. Finally, the temperature distribution in dc-link fuses is presented.
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