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MOSFET Control problem with PIC PWM Signal

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jean12

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Hello,can some body tell me what I can do for controlling my MOSFET here,I am applying a controlling signal but I don't get the output but the MOSFET are becoming highly hot.

Please Help.

Thanks.
 

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Your H-Bridge Circuit is wrong. http://www.talkingelectronics.com/projects/H-Bridge/H-Bridge-1.html

You have to use 2 pairs of N and P Channel MOSFETS. Study how H bridge works. One N-Channel and One P-Channel MOSFET will be active at a time.

Where is the bias voltage for the MOSFETS? MOSFETS need a reverse voltage for the gate. Use design 6 from the above link.
 
Last edited:


Last edited:

jayanth.devarayanadurga said:
The circuit I gave is for H-bridge for driving motors and not for DC to AC converter. Provide a detailed circuit with part names of MOSFETS and opto isolators.

Withou bias voltage for gate MOSFET will not work.

https://www.intersil.com/content/dam/Intersil/documents/an96/an9611.pdf
https://schematiccircuit.com/dc-to-ac-inverter-with-mosfet/
**broken link removed**
Click to expand...

The opto isolator is HV400IP ,the signal is being generated by a Microcontroller PIC16F1827 using Tahmid blog ,it is generating two signals of 50Hz and 2 signals of 20KHz so those four are applied on the gate of the MOSFETs;when applying the signal the MOSFET (IRFP460) became very hot.

Please help.

Thanks
 

hello Jean, Can get an idea from this ,try Six-output-600v-Mgds-Simplify-3-phase-Motor-Drives.jpg
 

So how can you help me with the MSOFET of the same types in H_Bridge??

Thanks.
 
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    bandu

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Jean, One of my friend gave this note ,he said, he also download it from net ,this is PIC driving motor circuit, I think this may be helpful to you.
bandu.
 

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  • P9-059.pdf
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Jean ,read this page to get an idea
Bandu
**broken link removed**
 

Me I am using HV400 as drive and MOSFET IRFP 460;the PIC16F1827 is giving PWM signal of 20KHZ and 50Hz .

Can you please help me to think far on this implementation??

Thanks,please help
 

mosfet hi.gif jean see this
bandu
 

Hello I am using only N-Type MOSFET?and I found that it is possible to use them so help me with that.
 

jean .Did you find any solution ,for your mosfet control?
bandu
 

No,I didn't.
Please help.
 

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