Purpose of a transformer between IGBT and motor?

A GIR

Hello,

We have a look on many drives on the market.

If we focus on the High Power Drive only (~20A to 40A), I can see a transformer is added between the IGBT and the motor phase, like the following shematic:

Is somebody can explain to me what is the aim of this transformer?

How design it? What is the aim of the resistor set in parallel? why these values?

Thank for any information about it.

Regards

over 3 years ago

0 Pablo Armet over 3 years ago

TI__Mastermind 37683 points

Hi A,

We are looking into your question and will get back to you with a reply within 24 hours.

Regards,

Pablo A

0 Aaron Barrera over 3 years ago in reply to Pablo Armet

TI__Mastermind 26046 points

Hello,

I think the transformer may be the load of the 3-phase inverter.

https://www.researchgate.net/figure/Circuit-diagram-of-three-phase-inverter-with-transformer_fig24_288457449

The transformer is just an inductive load, which may be used in this 3-phase inverter for EMI filtering. The resistive load in parallel with the inductive load is used to produce more torque or power.

Thanks,
Aaron

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Purpose of a transformer between IGBT and motor?