Rotational Speed Of Rotor Research Articles

Adaptive odd repetitive control for magnetically suspended rotor harmonic currents suppression

Magnetic levitation rotating machinery has been widely used in industrial applications. Odd harmonic currents in the active magnetic bearing coils, which are caused by rotor mass unbalance and sensor runout, increase the power consumption and the base vibration. Repetitive control has recently been used to suppress harmonic currents in magnetic bearing systems. However, repetitive control needs the rotor rotational speed information and has some limitations without a speed sensor. In this paper, an adaptive odd repetitive control which does not need the speed sensors is proposed to suppress the active magnetic bearing odd harmonic currents. Compared to the conventional repetitive control, the second-order generalized integral frequency-locked loop is applied in adaptive odd repetitive control to estimate the rotor speed in real time without additional speed sensors. The magnetically suspended rotor with harmonic disturbances is modeled. The work principle, structure, and design of the adaptive odd repetitive control are addressed. The simulation and experiments are carried out on a rotor active magnetic bearing test rig to validate the effectiveness of the proposed adaptive odd repetitive control, and the results show that the active magnetic bearing odd harmonic currents are well suppressed.

Performance assessment of straight and linearly tapered rotors through wind tunnel investigation for off-grid applications

The development of commercial wind turbine (WT) blade often accompanies many challenges due to its complex design process, geometric configuration and associated cost. In this backdrop, the article tries to put forward the applicability of a much simpler form of WT blades, which could be used in place of blade element momentum theory (BEMT) based turbine blades. In the present investigation, four small-scale horizontal-axis wind turbines model rotors having NACA0012 as its sectional profile has been designed and tested. The three model rotors opted to have straight and linearly tapered (SLT) blades, have been chosen in reliance on their simplicity and ease of fabrication. They are differentiated based on the root chord to tip chord ratio as M1 (1:1), M2 (5:3) and M3 (5:2), and subsequently compared with a BEMT rotor of a similar operational configuration. The wind tunnel investigation shows that the power coefficient for M1 is higher than M2 and M3. The favourable models M1 and M2 are capable of capturing power coefficient of, 37% and 24%. respectively, of the Betz-Joukowsky limit while operating at blade pitch angle less than 30°. Based on their operational characteristics, it is suggested to operate the modelled SLT rotors in the potential generation phase of the power characteristics curve to avoid a sudden drop in the rotor rotational speed.

Numerical and Experimental Investigation of the Performance of a Vertical Axis Wind Turbine Based on the Magnetic Levitation Concept

Abstract In this research, a vertical axis wind turbine (VAWT) with a Magnetic Levitation (Maglev) design was fabricated and tested. Numerical simulations were conducted to predict the magnetic flux distribution and generated voltage in the axial flux generator. Rare earth magnets were used to generate a repelling force to suspend the turbine rotor in order to minimize friction and increase rotational speed. Axially magnetized disc magnets and specific coils arrangements were set to produce voltage. The performance of the turbine was studied at various rotor rotational speeds ranging from 20 rpm to 200 rpm. Results show that the height of the gap between rotor and stator plates as well as the gap between coils and rotor magnets has a significant influence on the output voltage. The peak voltage was found to be increased by at least 1.3 V for each 1 mm reduction in the gap between coils and rotor magnets. The information provided in this paper may be beneficial for future researches related to efficiency optimization of Maglev wind turbines.

Digital Adaptive Control of Unbalanced Rotor Velocities with Anti-windup Augmentation*

The paper is devoted to the problem of controlling the rotation speed of unbalanced rotors of a vibration machine. The solution to this problem is important for vibration technologies, such as transportation and mixing of bulk media. Since the characteristics of the rotor drives can vary in the wide range depending on the mode (operating rotation speed), the load on the vibration platforms, and other factors, the requirement for the robustness of the system in relation to the parameters of the setup is of big importance. For this purpose, adaptive control based on the use of an implicit reference model is employed in the work. For the digitalization of the control process, it is also required to transform the control law into discrete form and study the limitations, caused by time sampling. The boundedness of the drive control signal significantly affects the system performance. Therefore a method of digital adaptive control with anti-windup correction is proposed and evaluated in this paper. The results are examined by the simulations and experimentally studied on the mechatronic setup SV-2M, demonstrating the efficiency of the proposed solution.

Feature Extraction Method of Helicopter Target Based on Flicker Phenomenon Combined With Phase Compensation

For the typical multi-component periodic micro-Doppler signal parameter estimation, a helicopter rotor feature extraction method based on flicker phenomenon and phase compensation is proposed in this paper. The method firstly analyzes the formation mechanism of helicopter rotor flicker phenomenon in time domain and time-frequency domain through the integral model. Then the demodulation operator of the micro-Doppler signal is constructed for the phase compensation of the echoes with respect to the time-frequency flicker characteristics and the phase information of the slow time dimension of the target echoes. The parameter combination of the possible number of blades and rotational speed is predicted using the time domain flicker interval, and the phase compensation process is evaluated and optimized to significantly reduce the amount of computation. Finally, the parameter estimation of rotor blade number, blade length and rotational speed is acquired by calculating whether the center frequency of each flicker after phase compensation is periodically focused to zero frequency. The simulation results show that the method can effectively estimate the main parameters of helicopter rotor blades, and the processing results of the measured data show that the proposed method has more stable performance compared with OMP algorithm and Hough transform, which provides a new technical way for helicopter rotor blade feature extraction.

Aerodynamic Analysis of Onshore Commercial Large Scale Wind Turbine

In this study, the variations of yearly aerodynamic characteristics of horizontal axis wind turbines operating in an installed wind power plant (WPP) in detail was revealed by means of the blade element momentum theory and angular momentum theory. For this aim, five identical wind turbines of the three-bladed type having rated power of 2 MW located in an installed wind farm in Hatay province of Turkey were selected. According to the results obtained from horizontal axis wind turbines having rated power of Pr=2 MW, annual average turbine mechanical power output (P), power coefficient (CP), free-stream wind speed (U∞), and turbine rotor rotational speed (Ω) were obtained as 672.68 kW, 30.80%, 8.49 m/s and 12.81 rpm, respectively. Moreover, annual average axial flow induction factor (a), thrust coefficient (CT), thrust force (T) and blade tip speed ratio (λ) were calculated as 0.10, 0.34, 75.18 kN and 6.57, respectively.

Study on two-rotor interaction of counter-rotating horizontal axis tidal turbine

A counter-rotating tidal turbine can balance the axial torque and accelerate the wake recovery, leading to a more conducive array layout. This paper aims to investigate the coaxial-rotor interaction, considering variable rotor distance and rotation speed. A numerical model based on large eddy simulation (LES) is established to study the hydrodynamic performance of this turbine, and it is validated by a flume experiment. The research results show that the upstream rotor performance is severely degraded when the two rotors are configured with narrow distance; while this distance is too wide, the downstream rotor bears a large fluctuating load induced by the fully developed wake. In terms of rotation speed, the efficiency of the upstream rotor decreases with the acceleration of the downstream rotor, but the maximum reduction is less than 10%. Moreover, a severe disturbance region will be generated behind the upstream rotor caused by blade root vortex shedding, and the downstream rotor should be positioned far away from this region. Overall, the current two-rotor system can achieve the best energy efficiency at the rotor distance of 0.4D. Compared with a single rotor, this system improves power efficiency by nearly 10%.

Flow regimes in a multi-gap circular Couette-Taylor system with opposite rotating cylinders

This work investigates the flow structure in the gaps of a multi-cylinder circular Couette-Taylor system, which is a model of a two-rotor heat generator. The initial information for studying the flow structure was data on the magnitude of the resistance torque to rotors opposed rotation, as well as on the nature of the amplitude-frequency spectrum of pulsations of this torque, depending on the viscosity of the working fluid and the rotational speed of the heat generator rotors. The obtained data allow comparing the nature of hydrodynamic processes in the single and obtained multi-gap circular space of Couette-Taylor and calculating the parameters of structural formations in the multi-gap working space of the heat generator. At relative rotational speeds of rotors (3-50) rad/s, the main energy of flow pulsations (up to 90%) is found in the amplitude-frequency spectra in the frequency range (12-70) Hz. It is associated with vortices first described by Taylor, which are extended low-frequency regularly alternating spirals and vortex structures with right and left rotation in the region of higher frequencies (200– 500) Hz; their frequency is determined by the width of the annular gaps of the multi-cylinder system.

Joint voltage and frequency predictive controllers for distributed generation plants

The paper determines the effect of proposed joint voltage and frequency predictive controllers for distributed generation (DG) plants on quality indicators characterizing the control process in different operating modes of power supply systems. The studies are conducted in the MatLab environment (Simulink and SimPowerSystems simulation packages) employing control engineering methods. It is proposed to design and adjust joint predictive controllers by determining the resonant frequency of oscillations for the master generator rotor. This approach provides better quality indicators of voltage and frequency control in power supply systems while maintaining the same settings for the controllers of DG plants. With an additional load in an isolated power supply system, the maximum voltage sag is found to be 1.75 times lower than for local predictive control and 3.5 times lower as compared to the use of conventional controllers. For the specified mode, predictive controllers enable a threefold reduction in the transient time between rotor rotational speeds in a synchronous generator. In the start mode of a powerful electric motor, the predictive controllers of synchronous generators in the power supply system enable a 1.5 times reduction in voltage sag, with a 1.4 times reduction in overvoltage following its start. In the case of a short-term three phase short-circuit, joint predictive controllers allow a 1.5 times decrease in transient time and a 2.3 times decrease in the overshoot of power line frequency as compared to local control. In addition, frequency oscillation in the power system is also reduced. Similar effects are observed in other operating modes of the considered power supply systems equipped with DG plants. The performed dynamic simulation confirms the effectiveness of using joint voltage and frequency predictive controllers for DG plants, which consists in a positive impact on the quality of processes involved in controlling the parameters of power supply systems in various operating modes.

THE EFFECT OF ROTOR ROTATION SPEED ON DECREASED LABORATORY LIQUID WASTE POLLUTING PARAMETERS

aboratory wastewater is produced through laboratory activities. Laboratory wastewater can have a large impact on the environment if it is not processed before being discharged into the water body. Laboratory waste treatment can be carried out using suspended growth technology to reduce pollutant loads, especially Biological Oxygen Demand (BOD5) and Chemical Oxygen Demand (COD). Aims: This study aims to treat wastewater produced by the activity of laboratory using suspended growth technology. Methodology and Results: This research was conducted by finding the most efficient rotor rotation in degrading the load of BOD5 and COD pollutants. The reactor used is a Mixed Flow Reactor type reactor made of acrylic material with a thickness of 5.5 mm. The reactor is arranged into three series with the same sampling time and different rotor turns that expressed in rotors per minute (rpm). The reactor series consists of Reactor I with 50 rpm rotor rotation speed, 100 rpm Reactor II and 150 rpm Reactor III. Processing is carried out using 8 hours of detention time and variation of sampling time every 8 hours. Conclusion, significant and impact study: From the results of the study obtained the highest level of effectiveness of reducing pollutant load on processing using 150 rpm rotor rotation and 40 hours sampling time which is 94.6% for BOD5 parameters and 94.4% for COD parameters.

Исследование солнечного электромагнитного двигателя

The article presents the Mendocino solar engine and the solar unipolar engine and their shortcomings. A new solar electromagnetic engine was introduced. (Research purpose) The research purpose is in studying the electrical and mechanical characteristics of a solar electromagnetic motor. (Materials and methods) The LED digital switching DC power supply LW-K3010D; magnetic field detector; digital tachometers RPM, TL-900, DT-2234C; digital LED thermometer 1M-50⁓100; digital voltmeter 0.28 Inch Red; multimeters MAS830L, MAS838L, DT-181, HP-4070L; ammeters M4204; energy meter Dudget KIT MT-4014 were used during the study. The experimental method was used. (Results and discussion) Authors experimentally developed several engine designs. With a rotor diameter of 100 millimeters and a voltage of a high-voltage solar photovoltaic module of 110 volts, the power consumption is 0.44 watts, the rotor rotation speed is 750 rpm. The solar electromagnetic motor with a rotor diameter of 250 millimeters and a total rotor weight of one kilogram consumes 1.9 watts and has 100 rpm at free mode. (Conclusions) The article presents the designs of a solar electromagnetic motor in which there are no losses for eddy currents when the rotor rotates in a constant magnetic field of the stator, and the magnetic field of the rotor currents strengthens the magnetic field of the stator. The advantages of the proposed solar electromagnetic motor are high voltage and low currents in the electric windings, low energy consumption and no losses for eddy currents, for shading solar cells and for friction in sliding contacts. The results allow us to conclude the possibility of further development of solar electric machines using neodymium magnets, ionistors, high- voltage solar modules.

THEORETICAL AND EXPERIMENTAL STUDIES OF LOW-TEMPERATURE DEHULLING PROCESS OF HIGH-OIL SUNFLOWER UNDER A CENTRIFUGAL FIELD

Appearance of high-oily sunflower seeds with oil content 52–54 % in the 60’s of the last century, led to revolutionary changes in raw material base of the fat-and-oil industry, but caused difficulties in the process of its storage and processing due to the morphological structure features and biochemical composition of fruit coat. Overcoming of the main technological disadvantages for high-oily sunflower seeds during dehulling was achieved due to development of an innovative dehulling technology for seeds in frozen state to sub-zero temperatures, which was developed at the technology of fats and fermentation products department of NTU “KhPI”. This paper presents results of experimental study of sunflower variety Ukrainian F1 high-oily seeds dehulling (dehulling coefficient and kernel content coefficient) depending on the temperature change (0–-196°C) and centrifugal dehullerꞌs rotor rotation speed. It has been shown that rational dehulling conditions for dry seeds, which allow to reach maximum dehulling depth (K0 = 0,99) under conditions of minimum outputs of chaff and oilseed dust, are cooling temperature in the range of -30–-50°C and dehullerꞌs rotation speed 26,7 s-1. Based on the literature data and research results, it has been shown that one of the main reasons of dry seeds dehulling coefficient increasing, during the transition from plus to minus temperatures, is a change in basic physicochemical properties of cellulose fibers (the basis of fruit coats biochemical composition) with a solid adsorption surface towards increasing of its strength. According to a special experiment data in relation to change in aggregate state of sunflower oil in temperature range from +20ºС to -196ºС, it was shown that cellulose fibers with adsorbed oil are practically the only component of fruit coat, which increases its plasticity with decreasing temperature. It is noted that fruit coat plasticity increases most significantly in temperature range -30 – -50°C, when oil obtain a plasticine-like consistency. This is exactly what temperature range where minimum yield of chaff and oilseed dust is observed, i.e. the highest dehulling quality is achieved. Obtained scientific results of this study make a significant contribution to the theory and practice of oil seeds dehulling, which have structural and compositional features of the fruit coat.

Investigation on performance analysis of a small solar electric generator

In the present study, we investigated the design and performance of a small hybrid magnetic generator. With small solar electrical generators, the permanent magnetics are replaced with an assisted rotating field. The rotor and stator were fabricated with a magnetic and coil windings unit, in which the rotor set includes 48 NeFeB magnets and eight salient poles with coil windings for the stator. The DC from solar energy assists the induced magnetic field of the copper winding, making the rotor rotational. The copper windings and permanent magnet bars significantly affected the rotor rotational speed and obtained energy output capacity. We investigated two different systems for the solar electric generator. For Case I, input and output energy capacities were 4.98Ah and 3.53Ah, whereas for Case II, the input and output energy capacities were 3.79Ah and 2.95Ah. To obtain higher performance, three different operating conditions were performed. We found that the condition with four copper windings running in on-off mode every 12 min and four copper windings running continuously produced the highest performance (133.33%). This means that the output energy is higher than the input energy. The results are expected to provide guidelines for designing small solar electric generators for rural environments.

Imbalance Detection of Rotor Rotational Speed Using Doppler Radar

In operating a wind turbine, both predictive and condition-based maintenances are required to minimize the downtime caused by maintenance. The imbalance of rotor rotational speed is an important factor for diagnosing wind turbine failures. The rotational speed imbalance can be caused by accumulated damage or the accumulation of ice, dust, and moisture. In this paper, we proposed a method for detecting the rotational speed imbalance of a wind turbine using a Doppler radar. We calculated the difference in the rotational speed for different times using spectrograms obtained by observing the wind turbine with a Doppler radar and determined the rotational speed imbalance using the fast Fourier transform. The performance of the proposed algorithm was verified using both synthetic and numerical data.

Physiological quality of mechanically harvested chickpea seeds

Our objective was to evaluate the occurrence of mechanical damage in chickpea seeds with the combination of two harvester speeds (2.5 and 3.5 km.h-1) and three adjustments for rotor rotation speeds (500, 700, and 850 rpm). Harvesting was carried out in a seed production field. Seeds were evaluated for purity, germination (G), first count (FC), germination speed index (GSI), hypochlorite, electrical conductivity, and tetrazolium tests. There was an effect of harvester speeds on seed physiological quality for the first count (FC), germination (G), germination speed index (GSI), especially when combining with high rotor rotation speed. In these cases, the speed of 2.5 km.h-1 resulted in lower values. This harvester speed also had worse results when combining with 850 rpm for purity and hypochlorite tests. The tetrazolium test was not efficient in identifying differences in seed quality. There was no significant interaction between harvester speeds and rotor rotation speeds for the conductivity test. Evaluating the harvester speed’s isolated effect (3.5 km.h-1), we identified problems in seed vigor due to the higher value of exudates in the electrical conductivity test. Low harvester speed (2.5 km.h-1) associated with high rotor rotation speeds (700 and 850 rpm) causes a reduction of the physical and physiological quality of seeds.

Rotary Plow for Organic Soybean Cultivation Technology

The authors showed that a rotary plow deepened the arable layer and destroyed the plow bottom, simultaneously crushed plant residues, green manure crops and embedded them in the soil upper layer that was active for the cultivated plants roots and microorganisms, which allowed providing them with available nutrients, maintained fertility and increased soybeans yield.(Research purpose) To determine the soil deepener and the plow rotor agrotechnical parameters when working after different predecessors, to establish the dynamics of nutrients, soybean yield and to compare the technical indicators of various tillage implements.(Materials and methods) The authors studied rotary plow indicators when cultivating the soil after green manure, wheat and soybeans: the tillage depth and the tooth linear speed, the rotor rotational speed and depth, crumbling, hardness and ridging of the soil surface, the presence of plant residues, specific fuel consumption, productivity. They conducted a comparative field experiment, meadow-chernozem-like soil was treated with tools: discs BDT-3.0 – control; plowshare PLN-3-35 and rotary plow PRN-2.5 M.(Results and discussion) The authors determined that the tillage depth with the rotor was 0.143-0.149 meters, with the soil deepener – 0.25 meters, 25-27 percent of crop residues remained on the soil surface. It was found that the rotary plow details provided good soil cultivation, as a result of the incorporation of stubble and green manure, they contributed to a content increase of phosphorus in it by 11.8-13.3 percent, potassium – by 18-21.8, nitrogen – by 48.1-48.9 percent, which had a positive impact on the soybeans yield.(Conclusions) The authors found a regular increase in soybean yields when processing the soil with a rotary plow by 0.32 tons per hectare compared to discs and by 0.06 tons per hectare compared to a share plow. It was suggested to use a rotary plow PRN-2.5 M. for soil cultivating for soybeans in the Amur region. They calculated the economic and energy feasibility of soil cultivating with a rotary plow in organic crop production.

Effect of Lift-Share Ratio on Aerodynamic Performance of Winged Compound Helicopter

The influence of the lift-share ratio between a rotor and a wing on the aerodynamic performance of a winged compound helicopter in high advance ratio flight is investigated through numerical simulations in this paper. A simplified model constructed with only a rotor and a winged body is considered to focus on the aerodynamic interactions between the rotor and the wing. The effect of the interaction is evaluated through comparison to the isolated rotor and the isolated wing in the same flight condition. A cruising flight condition at which the rotor advance ratio is about 0.7 is considered where the rotor rotational speed is reduced to 75% revolutions per minute. The lift-share ratio between the rotor and the wing is changed by adjusting the wing incidence angle and the wing area. Numerical simulation results show that the aerodynamic performances against the lift-share ratio follow similar trends regardless of the wing incidence change or the wing area change. The lift-to-drag ratios of the rotor and the winged body both degrade due to the aerodynamic interaction between the rotor and the winged body as compared with the isolated configurations. The optimal lift-share ratio of the rotor is about 6–7% of the total lift. When the lift share of the rotor is larger than the optimal value, the overall performance is drastically reduced by the rotor/wing aerodynamic interaction.

Robust path tracking of a quadrotor using adaptive fuzzy terminal sliding mode control

With the increasing use of quadrotors, the design of flight control systems has become particularly important. In this paper, a new robust flight control system consisted of an adaptive fuzzy terminal sliding mode controller, and two proportional-derivative (PD) controllers are proposed to stabilize a quadrotor and to track a pre-defined flight path in the presence of external disturbances and model uncertainties. The PD controllers determine the desired attitude of the quadrotor and terminal sliding mode control adjusts the rotation speed of rotors. The dynamics of the quadrotor and external disturbances are identified online by applying adaptive Mamdani fuzzy systems. Also, the control chattering is eliminated by defining a continuous terminal sliding mode. Two Kalman filters are also utilized to improve the estimation of the quadrotor attitude and position. The simulation results and real-time implementation of the proposed flight control system show the efficient performance of the control system during two flight scenarios of the quadrotor.

VECTOR CONTROL ALGORITHMS FOR AN ELECTROMECHANICAL UNBALANCE VIBRATION MODULE WITHOUT PRELIMINARY MAGNETIZATION OF THE ASYNCHRONOUS MOTOR

With the development of electronic systems, the control of various asynchronous type electric motors is becoming more efficient and accurate. Such engines are used everywhere in the world, the variety of tasks performed by such mechanisms is growing every day, and the need for them is not decreasing. Nowadays, AC electric drive systems based on an asynchronous motor are becoming more widespread. This is due to the high reliability, simple design and relatively low cost of induction motors, as well as the rapid development of power converter technology, which makes it pos¬sible to create various types of semiconductor converters and reliable power supplies. In most cases, the vector control system is built for a pre-magnetized electric drive. This article discusses the synthesis of a vector control system for an asynchronous motor without preliminary magnetization, and also considers algorithms for vector control of an electromechanical unbalanced vibration module without preliminary magnetization of the asynchronous motor. Aim. To develop a control structure for an asynchronous motor of an unbalanced vibration module. Introduce a division link into the management structure. Synthesize a speed controller, rotor flux linkage and two components of the stator current. Compensate for the EMF action in the channels of the transverse and longitudinal axis. Provide the control system with the ability to reverse the electric machine. Implement the simulation of the resulting system and conduct a study of the results obtained, having obtained dynamic characteristics. Methods. The vector control system is constructed in the form of a stabilization channel of the rotor flux linkage module and a channel for controlling the rotor rotation speed. To achieve the desired result, we introduce a nonlinear regulator of the division link type into the control structure. This will convert the nonlinear structure to linear. Let's compensate the EMF action in the channels of the transverse and longitudinal axis. Having realized the simulation of the obtained system, we will conduct a study of the results obtained, having obtained dynamic characteristics. Results. Structural modeling was carried out in the MATLAB/Simulink software package. For the purpose of a comparative assessment of the synthesis results of a control system with a torque regulator in the form of a division link, a subordinate control system will also be synthesized, which has similar parameters of the power unit. Conclusion. The choice of the motor torque as the output coordinate makes it possible to significantly simplify the mathematical model of the induction motor. In addition to the features of the mathematical model of an asynchronous electric motor, in this work it is necessary to take into account the features of the vibration module as a load. In this case, two main features can be distinguished – a large moment of inertia of the flywheel masses of the electric drive, as well as a sinusoidal dependence of the moment of resistance on the angle of rotation of the rotor.

STUDI EKSPERIMENTAL PERFORMANSI TURBIN SAVONIUS DI PESISIR PANTAI KABUPATEN DEMAK TERHADAP DAYA LISTRIK YANG DIHASILKAN

<p><em>Energy from fossil fuels consisting of petroleum, coal, natural gas containing raw material for energy fulfillment in Indonesia is still very central through the use of raw materials from renewable energy is still very low. In Indonesia the potential for renewable energy such as wind energy needs to be optimized. One of the uses of wind energy is through savonius wind turbine as electricity generators. Characteristics of savonius wind turbine with vertical axis rotors which gave a simple shape, and that able to control low speeds. This is in accordance with regions in Indonesi which have low average speeds. This experimental study, aims to determine the description of wind potential and determine the performance of savonius wind turbines on the coast of Demak regency on the electrical energy produced. Savonius wind turbine used is made of galvalum material in the form of an S type rotor with diameter 1.1 m and height 1.4 m, using pulley transmission system with multiplication ratio 1:6 dan using generator type PMG 200 W. This research uses the method experiment. Data collection in the form of wind speed, humidity, temperature, rotor rotation speed, voltage and electric curret is carried out at 14.30 to 17.30 Western Indonesian Time. Data Analysis in this study uses quantitative descriptive analysis. The result showed the potential of wind on the coast of Demak regency have an average wind speed of 2,02 m/s with a temperature of 31</em><em>,</em><em>34 </em><em><sup>0</sup></em><em>C and humidity of 76,96. And the performance of the installed wind turbine produces the highest power 3.5 watt with an electric power coefficient of 0,181 and tip speed ratio around 1,75. From these result, the potensial of wind with performance savonius turbine can generate electricity used for pond lighting in the village Berahan Kulon Kecamatan Wedung. </em><em></em></p>