Distributed Data Logger Based on Dual-Core MCU in Motor Drive

The MCU is the core component of the motor drive because the optimized control algorithm is implemented using the MCU. Monitoring motor control variables becomes important because it provides better insights and information to analyze and optimize the performance of the control algorithms. MicroSD card, with its advantages of compact size, interface connection, and reasonable price on acceptable performance, is used as an external storage device. However, the microSD card has a serious disadvantage of its extended busy time in the writing procedure, which affects motor control performance. In this study, we propose a microSD card writing scheme by exploiting the dual-core structure of MCUs to overcome the microSD card busy time and implement a data logger based on the proposed algorithm. The experimental results show that the proposed scheme provides remarkable performance and the capability to log data over a long period without any missing or corrupted data.