Transient Response Enhancement of PMD Battery Charger Using Rule-Based Fuzzy Logic Control

This paper proposes a transient response enhancement of a personal mobility device (PMD) battery charger using a rule-based fuzzy logic control (RBFLC) method. PMD encompasses various applications, including electric kickboards, electric scooters, and electric wheelchairs. The rated battery voltage required for each device is different; additionally, the PMD battery charger must be accurate and have a fast transient response. However, when the gain is significantly increased in the conventional proportional-integral (PI) control method to enhance the transient response, the battery charger output voltage exhibits oscillatory behavior and becomes unstable. Therefore, in this paper, the RBFLC method is proposed to improve the transient response performance of the battery charger without oscillation and instability of the output voltage. The proposed RBFLC method is verified through simulation and experimental results.