vinu gopalakrishnan
Member level 1
For my 3 phase inverter based speed control of IM, whenever i test it IGBT burns out.
if i take the DC bus from a voltage regulator there is no problem, motor doesnt move but a humming sound can be heard. If i take the DC from a rectifier, two of the IGBTs allways fail.Why does this happen?
please note that:
IGBT 1200v,35A (15n120)
RC snubbers used.
dead time of 3.6us given
IM- 3hp, 1500rpm....
pls help......
if i take the DC bus from a voltage regulator there is no problem, motor doesnt move but a humming sound can be heard. If i take the DC from a rectifier, two of the IGBTs allways fail.Why does this happen?
please note that:
IGBT 1200v,35A (15n120)
RC snubbers used.
dead time of 3.6us given
IM- 3hp, 1500rpm....
pls help......