Dynamic Characteristic Improvement of Battery Charger for PMDs Using a Model Predictive Control

Abstract

This paper proposes a dynamic characteristics improvement of battery charger for personal mobility devices (PMDs) using a model predictive control (MPC). The battery charger is used to charge a battery of PMDs such as electric scooters, electric bicycles, and electric skateboards and an output voltage of the battery charger is generally controlled by a proportional-integral (PI) controller. The PI controller requires a gain tuning to improve a dynamic characteristic, however, an overshoot of the output voltage can be occurred in transient state when the gain is increased. Therefore, to improve the dynamic characteristic of the battery charger for PMDs, this paper presents the MPC method to control the output voltage of the battery charger for PMDs. The effectiveness of the proposed MPC method is proved by the simulation and experimental results.

Keywords

• Battery charger
• personal mobility devices (PMDs)
• model predictive control (MPC) method
• dynamic characteristic