Inverter module explosion and energy storage capacitor

What happens if a high power inverter module fails?

As the application of high power inverters in the MW level is typical for railway traction industry, the failure of module can cause fractures sprayed. The extreme consequences may involve main busbar short-circuit, damage the gate control circuitry and others.

What causes an IGBT module to explode?

For the high power, high voltage IGBT module application, the explosion effect normally relates to encapsulating materials, such as silicone gel, plastic frame, or epoxy seal used for the module. The mechanism is rather complicated during the real module explosion process.

What is a high power module explosion?

One of failures is module explosion during the operation in the filed or even at test bench. The high power module explosion can cause direct damages and huge influences to surrounding systems or even cause safety problems depending on its application scenario [1-3]. 1. Introduction

What happens if a capacitor fails in an explosion test?

into the module under explosion test. Therefore, it is important to predict or avoid any component failure that can lead to a sudden discharge of the energy in dc capacitors. If left unprotected, undesirable short-circuit failures can lead to high surge currents within the submodules , .

Do high power IGBT modules have anti-explosion capability?

The anti-explosion capability or minimise-damage capability of high power IGBT modules is key consideration element to decide on the converter or inverter equipment reliability in the extreme scenario. Test methods and experimental results on case rupture capability have been introduced in several papers [2-5].

What causes an explosion in a power supply?

1. The essence of the explosion is that the heating power exceeds the cooling power, and the internal cause should be overheating. 2. Human factors (1) The incoming line is connected to the outgoing line terminal (2) The inverter is connected to the wrong power supply (3) The load is not connected as required 3.