Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

H-Bridge Overload protection

Status
Not open for further replies.
M.Rehan

M.Rehan

Full Member level 2
Joined
Feb 10, 2016
Messages
129
Helped
2
Reputation
66
Reaction score
33
Trophy points
28
Activity points
972
Referring to POST 83 "sine_power_002 - mosbank.pdf"
of
https://www.edaboard.com/threads/150224/

How this short circuit protection works?
Capture2.PNG
 

Desaturation detection, trips if gate voltage is high and drain voltage higher than a threshold level.

Desaturation detection works well with IGBT and to a certain extent with high voltage MOSFET, but not so reliably with low voltage MOSFET.
 
  • Like
Reactions: M.Rehan

    M.Rehan

    M.Rehan

    Points: 2
    Helpful Answer Positive Rating
Any other Overload/Short Circuit protection circuit for Inverter with op amp(Hysteresis)?

Its not showing any different outputs, operating at normal vs short circuited in proteus



Thanks
 
Transistor output characteristic determines expectable desaturation behavior. Question is if desaturation detection can shutdown an output short before the transistor is destroyed.

Current measurement with shunt allows more selective overcurrent detection.
 
  • Like
Reactions: M.Rehan

    M.Rehan

    M.Rehan

    Points: 2
    Helpful Answer Positive Rating
Desaturation Protection for H-bridge

I am not able to understand desaturation protection and formulas to calculate output at shortcircuit pin (Image attached)

Mosfet Using 75nf75 with 12V (Vgs) signal supply with high and low side drivers
configuration: Full bridge
Normal operating current Id = 20 A


Capture2.PNG
 
Last edited:
also , I am not able to understand how this short circuit protection works?
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top