Power Electronics & Controls
7% of exam
Converters, inverter-based resources, VFDs, relays & ladder logic.
4 concepts
Exam areas
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Converters, inverter-based resources, VFDs, relays & ladder logic.
4 concepts
DC-to-AC conversion: PWM and modulation index, output voltage formulas, grid-following vs grid-forming inverters, and IEEE 1547 ride-through basics.
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Convert AC to DC: diode and SCR behavior, half-wave, full-wave, and six-pulse outputs, firing-angle control, ripple, and the harmonics rectifiers inject.
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Control induction motor speed with a VFD: constant V/f flux control, the rectifier-bus-inverter chain, drive harmonics and mitigation, and braking options.
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Read and build control circuits: NO/NC contacts, seal-in and three-wire start-stop, Boolean algebra with De Morgan's theorems, truth tables, and PLC scan order.
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