Brushless motors are frequently used in (H) EV applications. These highly efficient motors are based on fast and precise rotor position sensors for switching, since these sensor parameters have a significant impact on starting behavior, dynamics, torque undulation, and efficiency. There are different principles to detect the position of the rotor: electromechanical (inductive) and magnetic resolution. Sensor systems based on solving the problems of transistors have some limitations (analog output, complex circuit, high system costs, space limitations, sensitivity to lost fields and positioning tolerances, etc.).
The 32-bit AURIX microcontroller family, With its delta-sigma ADC to perform carrier signal generation and software-based coding, it already helps save the external resolution IC and, therefore, the system cost by 20%. On the other hand, magneto-resistant angle sensors (xMR) with AMR (Anisotropic-Magneto-Resistance) or GMR (Giant-Magneto-Resistance) technology offer high precision accuracy, combined with low sensitivity to the tolerances of position.
No comments:
Post a Comment