Which IGBT module should I use for motor speed controller?

[garg29]

which IGBT module to use

dear friends
i'm making a 440 volt A.C, 2 HP, 3 phase, induction motor speed controller using PWM. i have to use IGBT's (6 of them, as for 3 phase). which one would you guys suggesst to me .
thank you

 

[IanP]

Re: which IGBT module to use

You can choose from here:
**broken link removed**
These modules are six-packs.
You will need minimum 1200V @ 6A version.

 

[nicleo]

Re: which IGBT module to use

I'm making a 440 volt A.C, 2 HP, 3 phase, induction motor speed controller using PWM. i have to use IGBT's (6 of them, as for 3 phase). which one would you guys suggesst to me.

Attached figure is the specifications of 2-HP/3-phase/440V/60Hz induction motor from Western Electric (Frame Size: 1AI90L-4). In my opinion, the specifications of your motor should be more or less the same to 1AI90L-4. The full load current of the motor is 3.2A. However, the starting current of the motor is 4.3 x 3.2 = 13.8A. In my opinion, we should take into consideration the starting current when we size the rating of the IGBT. Pls correct me if I'm wrong.

 

[seyyah]

Re: which IGBT module to use

The full load current of the motor is 3.2A. However, the starting current of the motor is 4.3 x 3.2 = 13.8A. In my opinion, we should take into consideration the starting current when we size the rating of the IGBT. Pls correct me if I'm wrong.

It's for direct starting. In a speed controller the drive shouldn't start suddenly. It will start from zero speed so the starting current won't go up to 13A suddenly. But if there is a possibility for this then yes you are right the rating must be somewhat higher than the current rating of the motor. Actually it must be higher than rated current in every situation less or more.