Snubber Circuits

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A MORE PRACTICAL TURN-ON SNUBBER As with the turn-off snubber, the turn-on snubber requires additional components to allow the transistor to survive. In this case, if nothing were added to the circuit, the transistor would recieve an impulse of voltage when it turned off, because the inductor current would be forced to change in a very short time. To avoid this potentially destructive transient, a resistor and a diode can be added to the snubber circuit, as shown above.The resistor R s provides an alternative path for the inductor current when the transistor turns off. The purpose of the D s is to keep the resistor from conducting during the turn-on transition
A MORE PRACTICAL TURN-ON SNUBBER The resistance R s must be large enough to completely discharge L s during the off state. However to minimize the transistor’s voltage stress, it should not be made any larger than necessary.
Page 1 and 2: DESIGN OF POWER ELECTRONIC CIRCUITS
Page 3 and 4: SNUBBER We need to control (limit)
Page 5 and 6: TURN-OFF SNUBBER Here is an example
Page 7 and 8: TURN-OFF SNUBBER If the transistor
Page 9 and 10: TURN-OFF SNUBBER Note that because
Page 11 and 12: TURN-OFF SNUBBER In addition to the
Page 13 and 14: CHOOSING A VALUE FOR C S If we choo
Page 15 and 16: A MORE PRACTICAL TURN-OFF SNUBBER A
Page 17 and 18: TURN-ON SNUBBER Dissipation during
Page 19 and 20: TURN-ON SNUBBER The solution to the
Page 21: TURN-ON SNUBBER At the switching fr
Page 25 and 26: CHOOSING A VALUE FOR L S If the sho
Page 27: COMBINED TURN-ON&TURN-OFF SNUBBERS

Snubber Circuits

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