Design a snubbing circuit for a power transistor that operates in a circuit consisting of an inductive load and an ac source. The resistive component of the load is 20 ? and the inductive component is 10 ?. The ac source is 120 V (rms) at 60 Hz. The transistor has the same ratings as the one
What will be an ideal response?
Solution:
Because of the large load inductance, there is no need for additional snubbing
inductance.
Examine the circuit in the figure. When the transistor opens, the current flow in
the snubbing circuit.
Assuming a 50% factor of safety design and assuming a standard value of
capacitor of Cs = 1.0 ?F
Use the equations below:
Therefore,
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