NGHIÊN CỨU THUẬT TOÁN VÀ THIẾT KẾ PHẦN CỨNG XÁC ĐỊNH GÓC QUAY ROTOR CỦA ĐỘNG CƠ ĐỒNG BỘ NAM CHÂM VĨNH CỬU

Abstract

In electric vehicles, the speed sensor of the drive electric motor plays a crucial role in feedback control methods. For permanent magnet synchronous motors
(PMSM) equipped with a resolver, it is even more important as it is used to read the rotor's angular position. The resolver contains no electronic components,
making it suitable for harsh working environments, but its output processing is complex and requires multiple stages. This paper proposes a new algorithm and
hardware design to optimize resolver signal processing on PMSM. Unlike previous studies that focused on control methods and control algorithms, this research
delves into the resolver signal processing, enabling accurate rotor position measurement—a key factor in PMSM feedback control. The system uses an STM32
microcontroller to calculate the position, along with an extended Kalman filter (EKF) to eliminate noise, significantly improving measurement accuracy compared
to conventional filtering methods. The resolver's excitation coil is driven by an H-bridge circuit with sine PWM control, increasing the resolver excitation
frequency to 100Hz, surpassing previous setups, allowing the system to collect more signals per rotation cycle. The rotor's angular position is calculated from the
processed resolver signals.