Perfecting the H bridge inverter in Pspice simulation
Hello guys
I have been trying to build a sine wave inverter and i chose to simulate first to get the clarity and proof of idea.
So i end up using P spice simulations and learnt how to generate a Sine pulse width modulation using it's elements
STEP1
The Sine PWM generated
Then i chose IRFZ45 Mosfets as the block for the H bridge and started simulating the model using Sine PWM.
But i have some problems or doubts regarding the procedure and i would like your suggestions to perfect the H bridge model if possible using the same Mosfet.
STEP2
Here when i did the simulation using 180 degree phase shifted PWM to the H bridge i got an output like this.The following are the corresponding schematic and output
Output 1
But when only one half bridge is driven using 5 V and the other bridge is kept idle i got an output like this peaking till 30 V.For me this is almost similar to Sine wave half cycle. How could be the 'Output 1' be like that and what should be done to get a +ve cycle like 'Output 2' and it's inverted output
Output 2
And finally when i took voltage across the R Load i got the output like this one
Output 3
Is'nt it the output should be like this with +60 V and -60V with a maximum tolerance of 10%.That's what the theory about H bridge implies.But i'm not able to get an out put as so.
What should i include or edit inside the circuit so that i can get a near perfect working H bridge in simulation.I trust i might have missed
Dead time but i have no clue how to implement it.Please do point out if any contrasting difference or mistake is found in this Simulation model.
It would be extremely helpful if you can help me to attain my desired output or give valuable suggestions.I will be extremely grateful for any such gestures.
Thanks again for your valuable time
Regards
Aron91