BLDC Controller: Why Do All MOSFET Gate, Drain, Source Terminals Short Together?

Hi, I have a Bldc motor Controller i dont know what went wrong with the controller, +ive and - ive terminal just shorted. When i opened up the controller all the mosfets in one line shows shortage across all three terminals. What causes all 3 terminals Gate, Drain, Source to shortens itself?

I would also like to simulate this type of shortage on a breadboard if anyone has idea do let me know

Hello.
Probably your motor could be blocked, or at start-up it requires more current than your controller can supply.
A simulation must predict the highest absorption from the motor, let's say very close to a short circuit.
Probably your mosfets have also worked in linear regime, therefore also check if the driver allows a good closure of the devices.
You can check out my following articles on EEWeb and Powerelectronicsnews:

https://www.eeweb.com/sic-mosfet-in-linear-regime/

https://www.eeweb.com/power-electronics-simulations/

https://www.powerelectronicsnews.com/power-de...power-with-sic-mosfets-connected-in-parallel/

https://www.powerelectronicsnews.com/the-importance-of-the-gate-driver/

Greetings
Giovanni

Why do MOSFET fail?
It can be observed that failures occur in two areas of the MOSFET structure. One failure is from gate metal to drain poly and the other failure is from source metal to gate poly. The conclusion from the analysis is that some voltage transient occurs on the gate and leads to the failur

There are several factors that can cause the gate, drain, and source to short, or to become electrically connected in a way that allows current to flow between them. These can include physical damage to the transistor, such as cracks or scratches on the surface, or contamination that affects the electrical properties of the transistor. Other factors that can cause a short include poor manufacturing quality, improper handling or storage, or exposure to extreme temperatures or other environmental conditions.

To prevent shorts from occurring, it is important to handle and store transistors carefully, and to use them within their specified operating conditions. In addition, it is important to use appropriate protective measures, such as packaging and shielding, to protect transistors from physical damage and contamination.

It is generally not recommended to intentionally create a short between the gate, drain, and source of a field-effect transistor (FET) on a breadboard or any other circuit. Shorts can cause damage to the transistor and other components in the circuit, and can also create hazardous conditions if the short results in a high current flow.

If you are trying to test or troubleshoot a circuit that includes a FET, there are other methods that can be used to stimulate the transistor's behavior without creating a short. For example, you can use a signal generator or other voltage source to apply an appropriate voltage to the gate terminal, and measure the resulting current flow through the drain and source. This will allow you to observe the transistor's behavior under various conditions, without creating a short.

It is important to be careful and cautious when working with transistors and other electronic components, and to follow proper safety procedures to avoid accidents and damage to the circuit. If you are not familiar with the proper handling and use of transistors, it is recommended to seek guidance from a knowledgeable professional or to refer to a trusted resource for more information.