Electrical machines
3-phase induction
Explore how a rotating magnetic field produces torque in a squirrel-cage rotor.
Open simulator →Interactive engineering lab
Component library
Built for students, teachers and the curious. Open a component, change its real electrical parameters, and watch the 3D model and characteristic curves respond as you go.
Electrical machines
Brushed DC
Explore how brushes and a commutator keep the armature torque rotating in one direction.
Open simulator →Electrical machines
Brushless DC
Observe how the inverter energizes three-phase stator windings in sequence to rotate a permanent-magnet rotor.
Open simulator →Electrical machines
Synchronous (PMSM)
See why a synchronous rotor locks exactly to the rotating field — and what happens when the load pulls it out of step.
Open simulator →Electrical machines
Stepper
Watch the rotor advance one discrete step per pulse — and see what happens when the pulse rate outruns the available torque.
Open simulator →Electrical machines
Servo
See how a closed loop holds the rotor on the commanded speed — and how the following error grows with speed until you raise the loop gain.
Open simulator →Semiconductors
N-channel MOSFET
See how gate voltage creates a conductive channel and controls drain current between source and drain.
Open simulator →Semiconductors
P–N junction diode
See how the depletion region enables forward current, blocks reverse current and changes during breakdown.
Open simulator →Semiconductors
Zener diode
See how a Zener diode is built to survive reverse breakdown on purpose — once the knee is reached, the voltage across it barely moves even as the current swings.
Open simulator →Semiconductors
LED
Switch between real LED colors and watch why the current, not the voltage, is what you actually control — and why a bare LED on a supply is always one step from burning out.
Open simulator →Transformers & magnetics
Transformer
Observe how alternating magnetic flux transfers energy from the primary winding to the secondary winding.
Open simulator →Passive components
Resistor
Observe how resistance limits current, drops voltage and converts electrical energy into heat.
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