Search

Electric motors are one of the more environmentally friendly transportation alternatives, which can be a problem solution to reduce pollution. Besides that, electric motors have become a necessity in the future. Opportunities to accelerate automotive electrification come from motorcycles. Motorcycles are not as complicated as developing electric cars. In this paper, the C-70 bike is a preferred target for driving force because it has a slim body, a lightweight, is not too large construction, and is still fashionable. In this paper, some steps are being taken to its manufacture. The first one, calculating the required electric motor power requirements. The second, to design and assembly the C-70 motorcycle frame with BLDC dynamo. The third is the C-70 motorcycle performance test inside and outside the Town, and the last one, the C-70 motorcycle painting as the final process. The electric motor's design results can cover 49 km with an average speed of 30-40 km/hour while out of Town with roads up and down mountains. At the same time, this electric motor can cover 50.23 km with an average speed of 30-40 km/hour from a fully charged battery condition in urban areas. So that's roughly 97.5 per cent of the distance travelled within the Town. So, this electric motor is more suitable in urban areas because there are many places to charge the battery, and it is more efficient to use when inside the Town. Besides that, the process of assessing the battery in this electric motor design takes 4 hours 30 minutes from the battery condition 0% (0 Volt) to 100% (81.5 Volt). In addition, the cost required to be very economical compared to motor fuel. [ABSTRACT FROM AUTHOR]

In recent years, portable electronic devices such as gadgets, tablets, mp3 players grow rapidly as daily devices for supporting people activities. In many applications, portable electronic devices need power backup. Since wireless power technology has been introduced in mobile device applications, portable power backup has become more popular to extend the battery life of mobile devices, moreover, the power backup technique also can utilize the advantages of wireless power technology. This paper presents the development of a dual-mode power bank: wireline and wireless, especially for gadget device power charge applications, to enhance user experience. The power backup is stored in a Li-ion rechargeable battery where the power in-outlet is monitored by the power monitoring module. The developed device was designed in a compact, simple, and portable module in the fashionable casing regarding the wireless power bank device. Concerning the wireless system, it was also designed based on Qi-standard Wireless Power Consortium (WPC), working at an operating frequency of 110kHz, maximum transmission distance at 10mm, and providing power at 5W. Experimental and validation reveal that the device can provide power 5V at maximum current 1A. The power transfer efficiency is around 70% and compatible with Qi-standard wireless power charger either modular or built-in inside portable electronic devices. [ABSTRACT FROM AUTHOR]