How to control 3 phase motor using GT60N321 IGBT in full bridge configuration

I can't read the schematic clearly.

There is something odd about the schematic. Two of the lower transistors do not appear to be connected to conduct current.

Also the bridges seem intended to be half bridges on each phase, not full H-bridges, so the circuit won't output AC. At least not if I am reading the grounds properly.

Maybe a larger discussion is needed to understand all the issues with designing such a circuit at these voltages.

The schematic isnt very clear  very hard to read BUT I can share you these insights. 

The DC link negative side seems to be missing, or maybe in the spaghetti referenced to ground.  

It kind of looks like the motor Nuetral of a WYE is tied to ground.

The DC link has to float as well as the motor should be connected delta - the "motor nuetral" is somewhere between DC link + and DC link -.   

https://duckduckgo.com/?q=3+phase+H+bridge&atb=v314-1&iax=images&ia=images&iai=https%3A%2F%2Fwww.researchgate.net%2Fprofile%2FSiddharth_Tyagi3%2Fpublication%2F332977818%2Ffigure%2Fdownload%2Ffig1%2FAS%3A756856242831360%401557459998703%2F3-phase-H-Bridge-Inverter.ppm

 You also didnt mention the 3phase output frequency that you are targeting for 400V output, and have you verified each phase gating is 120 degrees from each other ?  

​Guys, please consider the attached images of circuit diagram for your reference. we tried to simulate in proteus, in which motor runs. but physically we observed some issues with inverter module. Its output is not as expected. Rectifier is working fine. Rectifier output is 550 V. which is given to collector of high side IGBTs. 

​Expected output at Inverter output side is 400V AC. but we are getting only 10-20Volts output.

while handling single IGBT, issue we found with GT60N321 IGBTs are:-

1) When we give 10V Gate, 24V Collector, then we get only 12-13V output at Emitter

2) When we give 19V Gate, 24V Collector, then we get 23V output at Emitter

 but

3) When we give 19V Gate, 50V Collector, then still we get 27V output at Emitter. which should not have happened. We expect 48V approx output at emitter.

Output are being measured using multimeter. In practical we are giving 6 signals from Arduino to 6 IGBTs.  

​Arduino code has been attached for your reference. Go through the following link

https://drive.google.com/drive/folders/1xPWNTgpzAg_rWaKuolom9bMd_bKOaOKf?usp=drive_link

Please see the reply given to @robogary

I can't access that link.

What is the voltage at Vb of the IR2101?

Is it connected to the high collector voltage?

https://drive.google.com/drive/folders/1xPWNTgpzAg_rWaKuolom9bMd_bKOaOKf?usp=sharing

access this link... 

Vb is connected to 15V via bootstrap diode.

Vb is connected to Vs via bootstrap capacitor.

When the driver chip turns on the gate should be 10V above the emitter and stay 10 V above the emitter as the output voltage of the IGBT (Vs) goes high - due to the boost cap. It sounds like the IGBT can turn on okay but something is preventing the boost cap from boosting the gate voltage. Is the diode to 15V breaking down? What is its voltage rating of the diode?