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 […]

What is SCSOA?

SCSOA is an abbreviation of Short Circuit Safety Operating Area. During an incident with an inverter device, such as a load short-circuit, arm short-circuit, or ground fault, a current that is several times higher than the rated current flows in the IGBT. SCSOA is provided to protect the IGBT even during these instances. SCSOA has […]

What is RBSOA?

RBSOA is an abbreviation of Reverse Bias Safety Operating Area. The data sheet contains a characteristic graph describing double the rated voltage and rated current under the condition of maximum continuous operation temperature Tj(op). It illustrates a range of VCE and IC where safe operation is maintained when IGBT is turning off. The operation can […]

The parameter for thermal resistance given in the specification is described as ( per 1 device). What does it mean?

1 device represents a value per arm (IGBT+FWD). Some models connect multiple chips per arm in parallel. This parallel-chip configuration is counted as one chip.

Is the IPM’s input control signal high to switch the IGBT to on?

IPM V-series input control signal is IGBT-on when set at Low. A small IPM’s input control signal is IGBT-on when set at High.

What is a bootstrap circuit?

A bootstrap circuit is one that is composed of a control power supply to drive high-side IGBT. It is possible to have a single power supply as it does not require a transformer with multiple secondary windings. Its built-in bootstrap resistance and bootstrap diode (BSD) gives a small IPM to configure a bootstrap circuit simply […]

V-series IPM has VDA and VDN models of the same rating, but what is the difference between them?

VDA and VDN use different material for their insulating substrates, resulting in separate thermal resistance values. The VDA type uses aluminum oxide, while the VDN type uses high heat-radiation material, with approximately 30% less thermal resistance than that of VDA. It is effective when achieving a lower Tj max. or longer ΔTj power cycle life […]

What is a press-fit pin?

It is a pin type that allows PCB mounting without soldering. It is used in PIM and 6-Pack products. The time required for the assembly process is reduced as connection is completed by pressing an IGBT module over PCB’s through-hole and applying pressure from the base side. Special press and press-in tools are required. We […]