Creating a mathematical model of the brushless dc motor using the matlab simulink software environment

The paper presents a mathematical model of the motor with permanent magnets and trapezoidal counter-EMF constructed in the MATLAB Simulink software environment. The motor is controlled by a given rotor speed, feedback is provided by three Hall sensors and a speed sensor. A three-phase bridge inverter is used in switching. A sawtooth pulse-width modulated signal controls the speed. A single-loop speed control system is created, it is implemented through a proportional-integral controller and a sawtooth voltage generator. A ready-made PMSM block from the Simscape library is used to solve equations of the rotor dynamics and the stator electrical equilibrium. The proposed mathematical model makes it possible to study theoretically the electric drives operation using a synchronous motor with permanent magnets.

References

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