How can we reduce radiation noise?

Radiation noise can be reduced through methods such as reducing the loop current area where noise is generated, or adjusting the gate resistance. For details, refer to IGBT’s Application Manual Chapter 10.

How can we reduce conductive noise?

“Conductive noise can be reduced through methods such as adding an LC filter on the AC power side, adding a ferrite core, or adjusting the gate resistance to suppress dv/dt at the time of switching. For details, refer to IGBT’s Application Manual Chapter 10.”

What types of noise are generated at an inverter unit that has a power semiconductor device built in?

There are two types of noise: conductive noise (noise terminal voltage) and radiation noise. Conductive noise propagates over a conductor or earth wire in a main circuit. It is divided into two groups: normal mode and common mode. Radiation noise is generated within a device and emitted into the air because the device wiring or […]

Is there an upper limit of switching frequency for an IGBT?

The switching frequency (carrier frequency) is not defined in specifications. A higher frequency will increase the switching loss, leading to a problem with the junction temperature. The device will be operable under the absolute maximum rated temperature; a frequency of 15 kHz or less should be used for V-series IGBT module. For a welding device […]

Have Fuji semiconductor parts an UL certification?

Power semiconductor modules of Fuji Electric Corp. of America have been certified with UL standard 1557, category code QQQX2 (File No. E82988). The relevant model types can be found on the UL website’s (http://japan.ul.com/) Online Certifications Directory.

Are Fuji semiconductor parts compliant with REACH regulations?

Please contact Fuji Electric Corp. of America or your local sales representative or distributor to answer your question.

Where can we obtain an RoHS Certificate of Conformity (CoC)?

Please contact Fuji Electric Corp. of America or your local sales representative or distributor to answer your question.

Is there any quick way to determine the quality of IGBT before mounting?

You can verify the IGBT by checking the leakage current between G and E, and C and E, using a transistor curve tracer (CT). Simple failure diagnosis can also be done using a voltage, resistance tester in place of a CT. For details, refer to Application Manual Chapter 4-2.

Is it possible to get a product which is not in the catalog? Does Fuji make customized products?

Please contact Fuji Electric Corp. of America or your local sales representative or distributor to answer your question.

Is there any quality difference between products made in Japan and those made overseas?

Fuji Electric Corp. of America enforces the same quality standard for product management at all locations, regardless of where the manufacturing sites are.