Examples#
A collection of Python scripts that demonstrate how to use motulator.
Current-Vector Control#
These examples are for current-vector control of induction machines and synchronous machines. The magnetic saturation model of an induction machine is also demonstrated (2.2-kW induction motor, saturated) as well as computation of control look-up tables for synchronous machines (5-kW PM-SyRM).
V/Hz Control#
These examples shows operation of an induction machine under open-loop V/Hz control. Furthermore, a diode front-end rectifier and transition to six-step modulation are also demonstrated.
Observer-Based V/Hz Control#
These examples demonstrate observer-based V/Hz control for induction machines [1] and synchronous machines [2]. The examples 6.7-kW SyRM, saturated and 5-kW PM-SyRM, flux maps from SyR-e also present the use of saturation models. The example 2.2-kW PMSM, 2-mass mechanics demonstrates the use of a two-mass mechanics model.
References
Flux-Vector Control#
These examples demonstrate flux-vector control of electric machine drives [3]. In the implemented controller, decoupling between the stator flux and torque channels are used according to [4]. Furthermore, the stator flux magnitude and the electromagnetic torque are selected as controllable variables. The implementation of sensorless mode corresponds to [5].
References
Signal Injection#
These examples demonstrate a square-wave signal injection for low-speed operation based on [6]. A phase-locked loop is used to track the rotor position. For a wider speed range, signal injection could be combined to a model-based observer. The effects of magnetic saturation are not compensated for in this version.
References
Grid-Following Control#
These examples demonstrate grid-following control for grid-connected converters.
Grid-Forming Control#
These examples demonstrate grid-forming control for grid-connected converters. The example 12.5-kVA converter, RFPSC uses a power-synchronization loop for synchronizing with the grid [7]. In 12.5-kVA converter, disturbance observer, disturbance-observer-based control is used [8].
References
