.BLDC.Examples.DemoBLDC

Information

A permanent magnet synchronous machine is fed from a variable DC voltage source. The fire signals of the inverter bridge are determined from the output signals of the hall sensor. Thus the currents are electronically commutated from one phase to the next. After the machine ha accelerated, a load torque step is applied.

Plot the machine's speed smpm.wMechanical, the electrical torque smpm.tauElectrical and the quasi-RMS current quasiRMSsensor.I. Note that - if the reference voltage reaches VDC - full constant DC voltage without switching (except the commutation) is applied.

Note:

The spatial distribution of the magnetic field of the permanent magnet rotor is sinusoidal. Therefore the induced voltage is sinusoidal w.r.t. to time. A machine design with rectangular spatial field distribution leads to trapezoidal induced voltage. Such a design might be better suited for usage as brushless DC machine. However, such a machine model is not yet available.