http://repository.rmutp.ac.th/handle/123456789/84 2025-09-26T13:59:11Z http://repository.rmutp.ac.th/handle/123456789/4132 Constrution of portable DC to AC voltage converter Ruengmit, Prajak; ประจักษ์ เริงมิตร; RuenNgew, Nontakorn; นนทกร เรืองงิ้ว; Juikong, Alongkorn; อลงกรณ์ จุ้ยคง As the world's energy resources are currently insufficient to meet human needs, energy-saving and energy-efficient appliances have to be invented that are readily available and accessible to everyone. To have enough energy to meet human needs and to reduce the waste from the waste of energy resources each year to meet the demand for energy that can be produced by itself. This research presents the construction of a portable DC to AC voltage converter, or “Constrution of Portable DC to AC Voltage Converter,” which can be operated through a solar cell. By charging energy from the sun and storing energy at the battery. and can also bring electrical energy to use inside the pressure converter There is an inverter circuit that converts voltage from DC to AC so that AC power can be used in daily life. which has a lighting system, power socket, USB port and helps reduce electricity bills in the house and is convenient to carry From the experimental results of creating a portable DC to AC voltage converter, it can be used in daily life and saves electricity and is also clean energy from sunlight that does not cause pollution like a generator that uses oil. be a generator โครงงานพิเศษ (วศ.บ.) -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2564 2023-08-21T00:00:00Z http://repository.rmutp.ac.th/handle/123456789/4131 Electric Bicycle with Solar Panels Chuchuey, Nitit; นิธิศ ชูช่วย; Hrimchum, Jirapat; จิรภัทร์ หริ่มฉ่ำ; kanthawil, Athicha; อธิชา การถวิล This project presents an electric bicycle equipped with Solar Cell, which will charge the battery with a solar panel. To be used to drive electric bicycles, electric bicycles can be powered by two systems that are powered by the user's cycling and from brushed DC motors from battery charging with solar panels, the test will be tested by charging the panel with a time interval that the output voltage value From the solar panel which time interval is closer to the actual panel at 24 volts and charged into the battery,to test whether the electric bike can actually be used by a test drive starting with a displacement speed of 10 and 20 km/h at a distance of 100 meters. Using experiments with weight sizes of 50, 60 and 70 kg respectively, it was found that electric bicycles can actually be used. However, the above project has been made into two parts. is the part that charges the battery from the solar panel and the second part is a separate electric bicycle. โครงงานพิเศษ (วศ.บ.) -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2564 2023-08-21T00:00:00Z http://repository.rmutp.ac.th/handle/123456789/4130 Exercise bike generate electricity for ON-GRID Prapasrivorakul, Nuttavee; นัฐวีย์ ประภาศรีวรกุล; Thongkot, Theera; ธีระ ทองคต This Project presents electric bicycle. The structural feature is the use of the bicycle to be modified as it is designed to spin the rotor of the 5-phase magnetic line generator set and test the voltage distribution. The principle of operation of electric bicycles relies on the mechanical energy gained from cycling. The rotor consists of a series of permanent magnetic poles, intersecting with a stator consisting of a set of conductor coils, generating an AC voltage and converting it from AC to DC through a diode bridge to obtain DC voltage. To be connected to the boost converter to increase the output side pressure level to get the right voltage to charge a 12 volt battery. batteries. The test has been tested for cycling to generate electricity at a speed of 400 rpm while no-load has a voltage of 23.3 volt, and with a load per load and at a speed of 400 rpm, the voltage is 12.1 volt If the bicycle is cycled at an increased speed, the voltage and current will increase. In order to transmit electric power to the single-phase power system, an inverter is used to connect the single-phase power system to transmit to the single-phase power grid. โครงงานพิเศษ (วศ.บ.) -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2564 2023-08-21T00:00:00Z http://repository.rmutp.ac.th/handle/123456789/4129 A driving cycle for passenger car in the inner part of bangkok under Covid-19 situation Pradabyat, Napat; ณภัทร ประดับญาติ; Dowruang, Thanakorn; ธนกร ดาวเรือง; Panharn, Thanalert; ธนเลิศ พรรณหาญ Thailand is a country where passenger cars up to 7 people, the specified cylinder capacity does not exceed 1500 CC. Most used in Bangkok, which is a popular vehicle. Therefore, this type of vehicle was chosen to collect data to study behavior and create a driving cycle the selection of the data collection route includes: Ratchadaphisek Road - Rama IV Road Phaholyothin Road and Rama III Road - Narathiwat Road, etc. Which the road is in the business district which has a heavy traffic volume. At present, there is an epidemic of Covid-19 the government therefore has measures to lockdown. It affects the traffic conditions greatly compared to the normal situation. Therefore, data collection was performed on-board measurement. and grouping the time series clustering. In the part of the equipment used to store data, including : KYOWA Model EDX-200A, It is a highly accurate data storage device. by connecting to Global Positioning System: GPS sensor and connect to notebook The results of the data collection to create a driving cycle of 3 routes in the morning and evening (Peak time).It was found that most of the speed patterns used to create driving cycles were low speed patterns. The frequency of the speed range is close to the real driving and the speed range is in the range of 0-10 km/h. Which show that the traffic conditions on 3 routes are very dense. but driving in some parts can use speed and have the following movement patterns including : acceleration, deceleration,constant speed, stationary. Each route has different values. โครงงานพิเศษ (วศ.บ.) -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2564 2023-08-21T00:00:00Z