Switching characteristics during turn on , Electrical Engineering

Switching characteristics during turn on

A positive gate pulse between gate and cathodeis sufficient to turn on a thyrisotr. In this period thyristor changes its state from forward off blocking state to on state and starts conduction. Time is turn on time of a thyristor which can be divided into three intervals.

a.Delay time (t_d)

b.Rise time (t_r) and

c.Spread time ( t_s)

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