How do I mount a module?

Refer to IGBT module’s Application Manual Chapter 6-3 or Mounting Instruction.

How is the capacitor C of the snubber circuit to be determined?

The necessary capacity for a snubber capacitor can be obtained with the following formula. For details, refer to Application Manual Chapter 5.

What types of snubber circuit are available?

There are two types of snubber circuits. The first type is implemented between the DC power supply busbars and is called lump snubber. The second type is called individual snubber ciruit and is connected to each IGBT. For details, refer to Application Manual Chapter 5.

Does Cies show temperature dependence?

There is no dependency.

Does QG show temperature dependence?

There is no dependency.

How can we confirm the dead-time?

One way to determine the validity of the dead-time setting is to verify the current on the direct current power line during non-loading time. For details, refer to Application Manual Chapter 7.

How can we determine the dead-time?

To prevent a short-circuit in the upper and lower arms, it is necessary to set an on-off timing delay between the several arms. During this time period both devices are switched off. The dead-time needs to be set so that it is generally longer than the switching time of the IGBT (toff max.). For details, […]

Which parameters have an impact to IGBT’s short-circuit current?

IGBT’s short-circuit current is impacted by gate-to-emitter voltage VGE, junction temperature Tj, and switching voltage Vcc. Generally, a short-circuit current increases with a large VGE, low Tj, and large Vcc.

How do I calculate the power cycle in cases where there are multiple temperature rise peaks?

In cases where the temperature increases n-times per device operation cycle, we assign a power cycle life expectance count as PC(k=1, 2, 3, …, n). PC(k) is the power cycle life for the k-th temperature rise. A combined power cycle life expectancy count can be expressed by the formula below. For details, refer to Application […]

What types of power cycle capability are available?

The types of power cycle capability include the ΔTj power cycle (ΔTj-P/C) capability curve and the ΔTc power cycle (ΔTc-P/C) capability curve. We verify device life on two models, therefore please design a product life expectancy within these power cycle capabilities. For details, refer to Application Manual Chapter 11.