plz tel me the reason for MOSFET failure

[sudhavaithyanathan]

i am using MOSFET for the 3φ inverter to drive BLDC motor.Mosfet are frequently damaged . i could not not understand why it is getting damaged without giving supply to the inverter....plz tell me the reason

 

[jamshaidkhan]

Check that you define reasonable doping densities, temperatures, applied biases, etc. -Use smaller grid spacing in regions where electric field, etc. is expected to vary more.

 

[Meridian]

You didn't specify the type of mosfet. It is very hard to guess for us. Be more specific!

Mosfets can be destroyed easily in a number of ways. Static discharge (ESD), voltage spikes, incorrect filtering, defective clamping diode, etc...

 

[onurxxx]

use paralel diodes for all mosfet.

Added after 1 minutes:

use paralel diodes for all mosfets.

 

[jal_rule]

Try to calculate your design, dude!!

 

[grittinjames]

hai dude
no were mention wt type of circuite ur using . plz include schematics to get a proper answer