Prototype system for energy management of mobile device via wireless charging robot

Until now, energy management of the mobile device has been researched in two approaches; energy saving and energy charging. In terms of energy charging, energy harvesting and wireless charging technologies have been proposed to free the users from annoying task of connecting the wires for charging. However, these technologies could not satisfy all of the criteria; location-free, connection-free, reliable and human-safe. In response, the authors are proposing a new energy management method for mobile device based on the Wireless Charging Robot (i.e., mobile robot which mounts magnetic coupled resonances based wireless charging function). It operates in the combination of two charging tasks; charging the mobile device from robots (i.e., mobile device charging task), and charging the robot from charging stations connected to power system (i.e., self charging task). In this manner, robots mediate the energy delivery from the power system to the mobile devices, and consequently, the system satisfies all of the criteria. This paper introduces the design method of the system which can handle mobile device charging task. The effectiveness has been verified through experiment on energy management of three LEDs. We succeeded to keep the LEDs lit for 10 minutes while it normally goes off in 4 minutes without charging.