Circuit Theory & Power SystemsDiscipline: Basics of Electrical & Electronics (EEE1200)
AC Circuits, Phasors & Three-Phase Star/Delta Lab
Interactive laboratory suite for AC circuits: sinusoidal waveform generation, RMS and average mid-ordinate decomposition, pure R, L, C and series R-L circuits, rotating phasor vector diagrams, 2f instantaneous power waves, power triangle with capacitor power factor correction, and balanced Star (Y) vs. Delta (Δ) 3:1 power ratio analysis.
Instrument State:Live Analytical DSP Engine
Presidency University • EEE1200 Module 2
AC Circuits & Three-Phase Systems Laboratory
Interactive analytical workbench aligned with Dr. PL. Somasundaram's lecture slides.
Waveform Parameters
Faraday Rotating Coil Model235.5 V
50 Hz
0°
5.00 ms
Derived AC Waveform Quantities
Time Period (T):
20.00 ms
Angular Freq (ω):
314.2 rad/s
RMS Value (Vrms):
166.52 V
Average Value (Vavg):
149.92 V
Form Factor (Kf):
1.111 (ideal 1.11)
Peak Factor (Kp):
1.414 (ideal 1.414)
v(t) = 235.5 sin(314t + 0°)2 Complete Cycles
v(t) AC Sinusoid RMS (0.707 Vm) Average (0.637 Vm) Live Time Probe
Faraday Law of Induction Formula Proof (Slide 23–24):
e(t) = -N d(Φm cos ωt)/dt = N Φm ω sin ωt = 2π f N Bm A sin(ωt) = Em sin(ωt)
The peak voltage Em directly scales with coil turns (N), magnetic field strength (B), loop area (A), and rotation speed (ω = 2πf).
Technical Instrument Specifications
AC MetricsCycle, period, frequency, RMS (0.707 Vm), Average (0.637 Vm), Form & Peak factors
Phasors & R-LRotating phasor vector plane, impedance triangle Z² = R² + XL², and 2f power oscillations
Power TriangleReal P (W), Reactive Q (VAR), Apparent S (VA), and shunt capacitor bank correction
Three-PhaseBalanced Star (VL = √3 Vph) vs. Delta (IL = √3 Iph) with exact 3:1 power comparison