Difference between dual darlington transistor and dual igbt?
Difference between dual darlington transistor and dual igbt?
(OP)
For the high current types, is there any difference between a dual darlington transistor, and a dual igbt? As best I can tell from the data sheets, the types I am looking at appear to be the same.





RE: Difference between dual darlington transistor and dual igbt?
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If we learn from our mistakes I'm getting a great education!
RE: Difference between dual darlington transistor and dual igbt?
There are 6 IGBT's on the inverter side of the drive. The inverter igbt's operate in pairs, one pair for each output phase.
The 150 amp IGBT's are driven by a driver circuit up on the control board. Each circuit has a pulse generator chip, a mosfet, a hybrid gate driver ic (a Mits proprietary part), and a diode, working together to drive the base IGBT.
Why are there 12 driver circuits? I am thinking 6 are for motor forward , and 6 for reverse. Of each respective 6, 3 are for accel/run, while 3 are for decel. Is this thinking correct?
I will post a circuit diagram later of the driver circuit. I was hoping you guys could help me with finding a compatible hybrid gate driver ic.
Thanks!
RE: Difference between dual darlington transistor and dual igbt?
As a guess before seeing the circuit diagram, the drivers are either paralleled to boost the gate drive current to achieve a fast switching time, or you have a drive with an active front end rectifier for power factor control or regeneration (or both).
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If we learn from our mistakes I'm getting a great education!
RE: Difference between dual darlington transistor and dual igbt?
that will determine igbt or the darlington
RE: Difference between dual darlington transistor and dual igbt?