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Rancang Bangun Sistem Penyiraman Tanaman Secara Otomatis Menggunakan Sensor Suhu LM35 Berbasis Mikrokontroler Atmega8535
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Pengendalian Kecepatan Motor Arus Searah Dengan Logika Fuzi
Get PDFThe system which implements Fuzzy Logic Controller (FLC) on AT89C52 for controlling the speed of DC motor is not only able to stabilize the motor speed according to desired setpoint but also stabilize it on variable loads. The speed control is performed by regulating field voltage Vf with regulator buck which using Pulse Width Modulation (PWM) switching. There are two inputs for controlling the speed; setpoint and feedback. Each input is digitalized using ADC0809 and is processed through FLC to have output as duty cycle which then becomes input for the regulator buck. Observation is performed to speed response to different setpoints and to variable loads and also to anchor voltage Va. The result shows that FLC can be used for regulating DC motor speed according to setpoint. The speed reaches steady state within 2.52 s 4.65 s, with error rate 0.83 percents.
Keywords: Fuzzy Logic Controller, DC motor speed, Microcontrolle
Pengaturan Aliran Daya Reaktif Dengan Transformator Regulasi Jenis Pengatur Tegangan Pada Jaringan Sistem Tenaga Listrik
Get PDFReactive power flow regulation is power system is required to improve voltage profile and reduce system losses. Reactive power flow regulation is done using correct tap setting on the regulating transformer. The study is conducted through literature survey and simulation using ETAP. The result shows that correct tap setting on the regulated bus, voltage increases up to theallowable limits 10 percents over nominal voltage and at the same time reduce system losses. Finally, tehe result also shows that about 77,07percents of total reactive power required by load can be met by the transformer
Prototipe Turbin Angin Skala Kecil Tipe Vertikal Axis Untuk Battery Charging Di Daerah Remote Area
Get PDFWind energy is an alternative source of renewable energy that can be converted to electricity by wind turbines. This paper presents a prototype small wind turbine stand alone mode. The prototype has vertical axis rotor with airfoil blades and applied to low wind speed 2.5 metre per second. Design of this system including battery charger unit by LM350 as a dc regulator. Result of field test shows that output power is 38 Watt compared from calculation 50.33 Watt according to sweep area of blades. This prototype of small wind turbine designed to battery charging and dc home lighting in remote area, specially for traditional fisherman who settled in the seaside areas
Gain Characteristics Of Avalanche Photodiodes Based On Carrier Pair Injected Positions
Get PDFMean gain characteristics based on carrier pair injected position in avalanche photodiodes (APDs) is investigated by mean of the Random Path Length (RPL) Model that incorporates the carrier history. The model creates a randomly carrier path length to impact ionize following the dead space distance. Dead space distance is a minimum distance required for a carrier to travel to get adequate energy to impact ionizes. Under consideration is an ideal structure that is assumed has a dimensionless multiplication length and a uniform electric field. The simulation will be carried out for double carrier multiplication APDs with various dead spaces distances. An electron-hole pair in various positions is injected into avalanche photodiodes. The mean gain is recorded based on these injected positions of the carriers