Mecklenburg-Vorpommern Abitur Electrical Engineering - independent engineering foundations cheat sheet
Mecklenburg-Vorpommern Abitur Electrical Engineering - independent engineering foundations · Keep the key ideas within reach.
Electrical circuits, machines and digital logic
For a sinusoid V_rms = V_peak/√2; the stated impedance magnitude is for a series RLC model.
Q_C = P(tan φ₁ − tan φ₂) for power-factor correction
Transformer: V₁/V₂ = N₁/N₂ = I₂/I₁
Induction motor: n = (1 − s)·60f/p
Thévenin voltage is open-circuit voltage; deactivate independent sources to obtain resistance while preserving dependent-source behavior.
Karnaugh: give the minimum sum of products
Measurement, feedback, PLC and automation
Sensitivity = Δoutput/Δinput; resolution = smallest detectable change
Closed-loop error compares reference and measurement; integral action can remove appropriate steady-state error only under suitable stability and operating assumptions.
PLC scan: read inputs → run program → update outputs
4–20 mA live zero: (I − 4)/16 of the span
Repeatability ≠ accuracy, resolution ≠ sensitivity
Robot DOF come from its joints; workspace is the reachable volume
Engineering models, drawings, evidence and project decisions
State the system boundary and assumptions before calculation.
Units, sign conventions and uncertainty are part of the answer.
Verification against a specification differs from validation for an intended use.
Drawings need a declared convention and controlled revision.
Classroom models do not authorize physical operation or structural approval.