DriveLab

Change a parameter and watch the results 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. In the PWM-techniques module, drag the reference vector or the switching-angle curves to change the modulation index and watch pulses, spectra and the live oscilloscope follow. In the AC-machines module, drag the resultant field vector, unbalance the supply or load the machine and watch the field lines, the load angle and the Clarke and Park components.

From the starting of a DC motor and the rotating field of AC machines to the firing of a thyristor bridge, the switching of a PWM inverter, the field-oriented control of an induction motor and the comparison of modulation techniques — sinusoidal, space-vector, discontinuous and selective harmonic elimination — 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.
• 🧲
  Rotating field. Field lines and space vectors of AC machines, Clarke and Park transformations, load angle in motor and generator operation.
• 🧭
  Vector control. Indirect field-oriented control of the induction machine, with the block diagram, the space vectors and the inverter in the loop.
• 〽️
  PWM techniques. Carrier-based, space-vector, discontinuous and selective-harmonic-elimination modulation, with dead time, zero sequence and common-mode voltage.
• 💾
  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.