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Snubber Circuit For induction motor

steve_venkat

May 22, 2017
30
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May 22, 2017
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Hai,I'm trying to drive an bi-directional induction motor with BT136 triac,but often the TRAIC is blown up.So I tried to use the snubber circuit to avoid this issue.But I'm new to snubber design.

So please advice is this circuit is corrector have to change the circuit.

The induction motor is 230VAC operating and consume 1.4A in normal operation.
 

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Minder

Apr 24, 2015
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What type of motor is it, if bi-directional, then I assume it is a PSC motor if induction, if so you would need to swap the start run winding's over to reverse.
A snubber around 150ohm in series with a .1uf cap for a start might solve the failure problem.
M.
.
 

steve_venkat

May 22, 2017
30
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May 22, 2017
Messages
30
What type of motor is it, if bi-directional, then I assume it is a PSC motor if induction, if so you would need to swap the start run winding's over to reverse.
A snubber around 150ohm in series with a .1uf cap for a start might solve the failure problem.
M.
.
Can you check the diagram which attached in previous post..Is it correct..?
 

ramussons

Jun 10, 2014
439
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Jun 10, 2014
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439
Can you check the diagram which attached in previous post..Is it correct..?

The Snubber (with around 150 Ohms and a .05 uF in series) should be Directly Across the Triac. In your schematic shown the Opto is being fed from the tapping of the RC combination.
 

steve_venkat

May 22, 2017
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May 22, 2017
Messages
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The Snubber (with around 150 Ohms and a .05 uF in series) should be Directly Across the Triac. In your schematic shown the Opto is being fed from the tapping of the RC combination.

Is this circuit is ok..?
 

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