Learn by seeing
From the classroom equation to the waveform on the oscilloscope
Change a parameter and watch the consequences at once: torque–speed curves move, equivalent circuits highlight what changed and a live oscilloscope shows speed, currents and voltages as the machine starts, accelerates, takes load or loses its supply.
For the various starting and speed-control methods of DC and induction machines, you can also interact directly with the curves: click and drag them with the mouse to change the voltage, frequency, flux or resistance and see the new operating point immediately.
From the starting of a DC motor to the firing of a thyristor bridge and the switching of a PWM inverter, DriveLab connects the theory of electric machines, drives and power electronics with what actually happens in industry and in the power grid — renewable generation, energy storage, microgrids and the efficient use of electricity.
Created to support learning in undergraduate and graduate courses and open to anyone who wants to understand how electrical energy is converted and controlled.
- 🎛Live parameters. Every slider acts immediately on curves, circuits and simulations.
- 📈Real-time oscilloscope. Starting, load steps, voltage dips and supply cuts, with trigger and zoom.
- 🧮Equations with numbers. Each result is shown in general form and with the current values.
- ⚡Circuits and waveforms. Equivalent circuits, switching patterns, harmonic spectra and power factor.
- 💾Case studies. Save and load cases, pin reference curves and export figures in high resolution.
- 🌐English and Portuguese, light and dark themes, on any computer — nothing to install.
Resources
Five modules of the Electric Drives tool
DC machine
Starting and speed variation: armature voltage, series resistance, field weakening and rheostat starting, with the transient model including the armature inductance.
②Induction machine
Equivalent circuit from nameplate or WEG catalog data; direct, star–delta, autotransformer, reduced-voltage and rotor-resistance starting; V/f inverter control and field weakening; dq model.
Dynamic control
Cascade speed and current loops, anti-windup, state feedback, pole–zero maps and frequency response.
coming soonThyristor bridges
Controlled rectifiers and inverters: firing angle, commutation overlap, dual converters, power factor and DC-motor loads.
⑤PWM converters
Two-level and three-level NPC inverters, DC link and rectifier input, modulation, dead time and spectra, with current-source, induction-machine or DC-machine loads.
Where to go
The simulator and the author's academic page
