Field Oriented Control Implementation on BLDC Motor Controller with PI and SVPWM using STM32F103C8T6

Abstract

Brushless direct current (BLDC) motor are high power density motors with a wide scope for use in electric vehicles, home automation, and industry. But the motor performance degrades due to improper control actions. This is caused by uncontrolled BLDC motor torque currents. Field Oriented Control (FOC) method is a solution for controlling BLDC motor, because it has the advantaged of overcoming torque ripples at low speeds. This paper presents the implementation of FOC on BLDC motor using STM32F103C8T6, which is high speed and low cost microcontroller. STM32F103C8T6 has been applied to handle FOC algorithm calculation and data processing. In order to validate the FOC algorithm system and assess the performance of the STM32F103C8T6 microcontroller, a 350-watt BLDC motor on an electric bicycle was tested and compared with a Universal controller. The tests that have been conducted proven that the FOC controller makes power more efficient, rotates BLDC motor at low speeds, and reduces torque ripple.