Apr 18, 2019
07:04 AM
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Apr 18, 2019
07:04 AM
Hello All,
I'm using IGCM20F60GA to drive a three phase motor.
It is working very well.
Now I'm trying to use the CIPOS as two leg full bridge.
In order to spin the dc motor in one direction I keep phase V high in full conduction.
and I modulate phase U low.
It is possible for the power module to work like this?
I suspect we can have some problem with bootstrap circuit.
Can anyone help me to understand why this configuration is not working?
I'm using IGCM20F60GA to drive a three phase motor.
It is working very well.
Now I'm trying to use the CIPOS as two leg full bridge.
In order to spin the dc motor in one direction I keep phase V high in full conduction.
and I modulate phase U low.
It is possible for the power module to work like this?
I suspect we can have some problem with bootstrap circuit.
Can anyone help me to understand why this configuration is not working?
Solved! Go to Solution.
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ispn:8417:1:0
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l1:144:1:0
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l2:231:1:0
- Tags:
- cipos igcm20f60ga
- IFX
1 Solution
Apr 19, 2019
04:00 PM
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Apr 19, 2019
04:00 PM
Hi
We see no issue in using only two legs of the IGCM20F60GA. What is the switching frequency / duty cycle and the bootstrap capacitor value? Make sure there is sufficient time to charge the bootstrap capacitor or use lower values. Also look at any undervoltage conditions.
The under-voltage detection operates with a rising supply threshold of typical VBSUV+ = 12.1V and a falling threshold of VBSUV- = 10.4V.
Best regards,
Srivatsa
We see no issue in using only two legs of the IGCM20F60GA. What is the switching frequency / duty cycle and the bootstrap capacitor value? Make sure there is sufficient time to charge the bootstrap capacitor or use lower values. Also look at any undervoltage conditions.
The under-voltage detection operates with a rising supply threshold of typical VBSUV+ = 12.1V and a falling threshold of VBSUV- = 10.4V.
Best regards,
Srivatsa
1 Reply
Apr 19, 2019
04:00 PM
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Apr 19, 2019
04:00 PM
Hi
We see no issue in using only two legs of the IGCM20F60GA. What is the switching frequency / duty cycle and the bootstrap capacitor value? Make sure there is sufficient time to charge the bootstrap capacitor or use lower values. Also look at any undervoltage conditions.
The under-voltage detection operates with a rising supply threshold of typical VBSUV+ = 12.1V and a falling threshold of VBSUV- = 10.4V.
Best regards,
Srivatsa
We see no issue in using only two legs of the IGCM20F60GA. What is the switching frequency / duty cycle and the bootstrap capacitor value? Make sure there is sufficient time to charge the bootstrap capacitor or use lower values. Also look at any undervoltage conditions.
The under-voltage detection operates with a rising supply threshold of typical VBSUV+ = 12.1V and a falling threshold of VBSUV- = 10.4V.
Best regards,
Srivatsa