An SCR with an inductive load has a 20 µs turn-on time. Given a 2.5 KHz pulse train frequency and a 1/10 mark-to-space ratio, how will the SCR behave___________?
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Answer: A. Turn on
Explanation
Given the pulse train parameters and turn-on time constraints, the gate pulses provide sufficient energy. The silicon controlled rectifier will successfully latch and transition into a conducting state. Therefore, the device will easily turn on under these specified operating conditions. A silicon controlled rectifier requires a minimum gate trigger pulse duration to latch. The pulse frequency and mark to space ratio determine total available gate current. Comparing twenty microseconds against pulse width confirms adequate triggering energy is delivered.
Power electronics circuits rely on precise gate triggering to control large industrial loads. Inductive loads require careful timing to ensure proper semiconductor device commutation. Engineers calculate pulse trains to prevent spurious triggering and equipment failure. Claiming it will not turn on overlooks the sufficient duration of the gate pulse. Removing the inductance is unnecessary because the current pulse already meets requirements. Increasing pulse frequency is redundant since the current parameters are already adequate.
- Subject
- Engineering
- Category
- Electrical Engineering
- Topic
- —
- Difficulty
- medium
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