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In residential building sector, the provision of clean water is the one of primary need. The water pump used to do that matter. The technology for renewable energy source, i.e. Solar Water Pumping System (SWPS) will help the society in this sector to decrease the electricity consumption for providing clean water. The SWPS converts the solar energy into electricity. Then, the electricity used to activate...
Rural electrification in an archipelago country like Indonesia is a challenge. Indonesian government has stated that basic need of electricity is 60 kWh, however it is not easy to fulfill it. Fortunately, Indonesia is rich in biomass potency. Therefore, converting biomass energy to electricity might be a solution to the country electricity problem. A simple thermal energy harvesting system comprised...
Through all stages of growing, chickens need a certain climate quality. The old climate quality is only the actual temperature-based controlling. On modern climate, an organization called Cobb-Vantress detached three climate parameters need to be satisfied: 1) temperature, 2) humidity, and 3) wind speed. It is known that those three parameters are not independent, the area to be controlled are fast...
LED driver has the potential to interfere the system of electronic devices if the voltage and current change rapidly. Several previous studies presented various solutions to overcome this problem such as particular converter design, component design, electromagnetic interference (EMI) filters, and spread-spectrum techniques. Compared to other solutions, the spread-spectrum technique is the most potential...
Driving a high current-high power brushless direct current (BLDC) motor is not as simple as driving smaller one. Simple block commutated control will not adequate due to interaction of high current and parasitic components. The high current aspect requires careful consideration not only in components selection and printed circuit board design but also in control scheme. This paper will show the effect...
In this study, two high frequency transformer designs have been made in order to achieve zero voltage switching (ZVS) condition in a phase-shifted full-bridge inverter for dc-dc converter from 311 V input to 100 V output. One transformer was implemented using conventional winding technique while the second transformer was using interleaved technique. Simulation has shown that the second transformer...
Constructions of power plants in Indonesia are still focused on the use of non-renewable energy sources. Meanwhile, to achieve the targets of the National Energy Policy 2025, it is necessary to improve at least 10.4 % of the power plants installed capacity within ten years. Indonesia has limited generating capacity, and as an archipelago, Indonesia forces each island to produce their electricity independently...
One of the radial generator problems is in its cogging torque production which leads to the decrease of output power. Cogging torque in radial generator is caused by air gap width variance between stator and rotor. This paper presents the method to reduce cogging torque in dual-stator radial flux permanent magnet generator (DS-RFPMG). It is a radial generator which has two stators located on the inner...
In this paper, a simple fault-tolerance control method for a dual-PMSM speed drive system is investigated. The proposed method does not require any additional hardware. By suitably changing the switching states, a fault-tolerant control dual-PMSM drive system can be achieved. The fault-tolerant system can be applied for high-reliability applications such as, electric vehicles and other electric propulsion...
Start-up, loading, and shut-down procedure of induction generator is different from synchronous generator. At the initial time of grid connection, induction generator's voltage is zero. Therefore, it is assumed here that synchronization procedure as normally occurred with a synchronous generator is not required. However, it is well known that in order to operate properly, an induction generator needs...
This paper discusses the elimination of harmonic currents in the industrial power system utilizing adjustable speed drives. The harmonic current pattern measured and simulation results will be compared to IEEE-Std 519-2014. ASD can generate harmonic currents caused by front-end or input rectifier which tends to draw in the form of non-sinusoidal currents and not continuous. Based on the measurement...
This paper proposes an online maximum efficiency tracking control for a dual-motor drive system. The efficiency of each drive system is obtained by online measuring the input power and online estimating the output power. Two algorithms, including the steepest ascent algorithm and fuzzy logic algorithm are proposed to achieve maximum efficiency tracking. The proposed methods do not require any computations...
Hall-effect sensors are commonly applied in brushless direct current (BLDC) motor control for rotor position detection. By knowing the exact position of the rotor, inverter could supply energy in synchronize to the BLDC motor state. As the motor is categorized as synchronous motor, those sensors are vital. Working out of synchronization not only makes drive system less efficient but also threaten...
Full-bridge inverter is an important part of DC-DC converter where the output voltage is controlled. The other important part of DC-DC converter is high frequency transformer. The disadvantage of the converter that use conventional method is low output power efficiency because it still use hard switching method. Because of that, research about DC-DC converter especially in the full-bridge inverter...
Dc-dc converter with full-bridge topology is the best option to use as power supply with high power and high voltage level. Full-bridge topology combines the voltage properties of half-bridge topology and the current properties of the push pull topology. It is an elaboration from buck converter topology with isolated transformer as galvanic isolation. The main components of the dc-dc convert full-bridge...
This paper presents the performance of grid-connected inverter when installed in three-phase four-wire distribution system. The inverter is utilized as power converter to inject power. Furthermore, this inverter is also utilized as a shunt active power filter to compensate current unbalance, load current harmonics, and load reactive power demand. It is controlled such a way therefore it draws or supplies...
This research evaluates the application of Bluetooth for monitoring in-car sensors. Bluetooth technology is chosen to provide reliable communication system with low complexity and production costs. To assess connection among the predefined sensor positions in car, the RSSI (received signal strength indicator) measurement is conducted by using the HC-05 Bluetooth module as the receiver and Android...
This paper proposes an on-line maximum efficiency control method for a dual-motor drive system. By using the on-line feedback signals and doing simple computations, the output torque of each motor can be determined. Then, a maximum efficiency operation of the whole system can be achieved. The efficiency of the whole system, which includes motor efficiency and inverter efficiency, is investigated....
A maximum efficiency control for a dual-motor drive system is presented in this paper. The torque sharing between two motors is optimized by using the perturbation and observation method. A fuzzy-logic controller is implemented for the perturbation and observation method. As a result, the step of perturbation can be adaptively modified to improve the performance. In addition, a simple calculation...
Brushless Direct Current (BLDC) motor is a good option for electric vehicle application due to its power to weight ratio and efficiency. While knowledge about this motor is mature enough and has been widely available, to have further research and development and also to create our own BLDC control system product, a good research platform is required. In this paper, a simple platform based on 16-bit...
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