Rotation Speed Of Motor Research Articles

Analisis Pemodelan Dinamik Motor Sinkron Tiga Fasa Pada Percobaan Tegangan Tidak Seimbang

The problem that often arises lately in electrical motors is the occurrence of voltage imbalances. Unbalanced voltage is an unequal voltage value in a three-phase voltage system contained in an electric power system. On the basis of these problems, it is necessary to conduct research that can analyze the dynamics of the performance of synchronous motors. The frame of reference theory is used to analyze the performance of both synchronous and induction motors. This study implements the modeling of the transformation on the natural axis abc and the transformation on the dq0 axis of the stator and rotor variables in the coordinates of the reference frame. The results of this study indicate that the voltage imbalance from 1% to 5% at the electromagnetic torque has decreased from 8.5 Nm to 6 Nm, the stator current in one phase has increased from 44.2 amperes to 45.2 amperes, the motor rotation speed has decreased from 1820 rpm to 1570 rpm, motor output power decreased from 25550.05 watts to 18968.45 watts, and power efficiency decreased from 98.24% to 82.43%.

ANALISIS PENGATURAN PUTARAN MOTOR INDUKSI 3 FASA DENGAN MENGATUR FREKUENSI MENGGUNAKAN VARIABLE SPEED DRIVE DI PT PDAM TIRTA MANGUTAMA KABUPATEN BADUNG

Along with the increase in technology and knowledge, this increase in the field ofelectric power systems makes the electric power system very developed. Electric motors havevery important benefits in industry. In the operation of the electric machine, it is declared goodwhen viewed from the performance of the motor. The purpose of this research is to find outwhat is the influence of the rotation of a 3-phase induction motor when setting the frequency onthe speed and torque of VSD, as well as the effect of frequency on the amount of torque. Themethod used in this study is to take the rotational speed data measured by VSD and thencompare it with the results of the analysis of the speed and torque calculations. The results ofthe study based on the frequency setting on the VSD Display at PT.PDAM Tirta MangutamaBelusung Area. The results of the VSD settings obtained frequency values of 30 Hz, 35 Hz, 40Hz and 45 Hz. Calculations using the equation of motor rotation speed to frequency, thetheoretical value is compared to 900rpm and from the results of calculations using VSD is nodifference, which is 900rpm. So from these data it can be seen that the data practically showsresults that are in accordance with the theory so that it can be concluded that the performanceof the induction motor is in good condition.

Реализация PI-регулятора скорости двигателя постоянного тока методом математического моделирования

The work is devoted to mathematical modeling of a DC motor rotation speed control system based on the use of a PI controller. DC motors are widely used in industry for driving cyclical mechanisms where high speed response, high starting torque, linear control are required. The main methods for controlling the required characteristics of the speed of rotation of a DC motor with independent excitation are to control the parameters of the armature and excitation windings fed from different sources. The PI controller is widely used in programmable logic controllers due to the simplicity and clarity of the mathematical apparatus. The proposed mathematical model of the PI controller is based on the choice of optimal parameters that ensure that the actual speed is kept close to the set one. The optimum PI controller coefficients KP and KI have been determined to give the best result for a constant speed. The results of computer simulation in MatLab are compared with the results of simulation on a laboratory setup. The data are obtained when using the PI controller for the steady-state error and transient time look preferable to the simulation model with voltage regulation. The developed mathematical model shows the following main results: acceleration time < 0,3 s; transient process time < 0,5 s; overshoot does not exceed 0,5 %; the steady-state error does not exceed 0,1 %. As a result of the study, a mathematical model is developed and the operation of a DC motor with a PI controller is analyzed, which makes it possible to almost completely eliminate forced oscillations and a steady-state error. The advantage of the proposed method of using the PI controller is noted as a more familiar and easy-to-use control element when implemented in existing control systems without any special changes.

Моделирование режимов тягового вентильно-индукторного электропривода троллейбуса

The results from development and simulation of a switched reluctance motor for a trolleybus traction drive are discussed. The project is based on the motor modular designing principles, and the 180 kW TAD-3 induction motor with which trolleybuses are currently equipped serves as a prototype. The switched reluctance motor’s parameters were obtained from a numerical analysis of the magnetic field using the ELCUT computer program and have been embedded into the MATLAB/Simulink model of the motor developed for the 12/8 stator poles to rotor teeth ratio. The modeling makes it possible to improve the design procedure, rationally select the control parameters, and obtain the dynamics of changes in the motor main parameters in various modes of its operation. The dependences of the phase current r.m.s. value and the mean torque on the control parameters, as well as the change in the trolleybus motor rotational speed in the constant power mode are investigated. The proposed switched reluctance motor design version supports all modes of operation according to the trolleybus standard motion diagram in the case of its being equipped with the TAD-3 induction traction motor. In using a reluctance adjustable drive in urban transport vehicles, savings up to 30% of active materials are achieved; only readily available and inexpensive materials are used, and the motor design is well amenable to mass scale production with low labor intensity (the magnetic system has a simple configuration; the motor does not have a commutator, squirrel cage, and permanent magnets, and its coils are machine-wound).

Perancangan Alat Penghitung Bibit Ikan Otomatis Dengan Metode Counter Berbasis Arduino

Fish and other aquatic animals are a source of protein for humans that are useful for building units in the biosynthesis of damaged human body parts and regulating and controlling body function metabolism. Automatic fish seed calculation aims to help fish cultivation to calculate the number of fish, as well as provide information on the results of the number of fish calculations. The Counter Up technique is a logical circuit that is used to count the input values in the input and output sections in the form of binary digits with a separate channel for each rank. The design system for the fish calculation system uses Arduino nano, one of the developments of a microcontroller that has a small size. The results of data testing carried out are in the form of servo motor rotation speed data, calculation counters and the maximum input power is 220 volts, the speed is 1300 rpm with a total of 468 calculation results. Fish seeds within 1 minute.

Vibration-based diagnostics of electrical engineering complexes motors over 40 kW

A vibration-based diagnostics method of large-power 1JAH5 (Siemens) DC motors over 660 kW used in paper machines is proposed in the article. When studying vibration spectrograms it was found that 8 Hz frequency shock loads considerably prevail over vibration, which corresponds to this motor rotor speed. The cause of vibration initiation generated by the motor rotor spinning was determined by theoretical methods. Vibration on the one hand appears as a result of bearings wear accompanied by bearing cage deformation and their shaft spinning axes reciprocal displacement, and on the other hand, by shaft eccentricity radii enhancement which causes dynamic loads increase affecting bearing units. The authors of the paper have come to the conclusion that in order to lower vibration of the motor it is necessary to replace the bearings with the new ones, the former due to a long-term service (over 30 years), vibration and shock load effects having exhausted their life span.

Результаты экспериментальных исследований применения бесколлекторного электродвигателя для высевающих аппаратов пропашных сеялок типа МС

This paper presents the data of comparative studies of the characteristics of the Mxus XF15R brushless elec-tric motor (rotation speed; consumed current, power and efficiency) depending on the maximum torque. The de-sign of the stand for studying the characteristics of the seeding process when using an electric drive of the seed-ing disc is presented; the key elements of the stand are: the seeding section, seeding disc, electric motor connect-ed to the seeding disc, the control unit, the source of rare-fied pressure, the seeding disc speed sensor and the seeding sensor. The technique of working with the stand and the procedure for setting it up are described. During the operation, the following indicators are taken into ac-count: control signal of the seeding disc drive; seeding disc and rotor revolutions, rpm; the number of the seed in the total volume from the moment of measurement; time between seeds falling, ms; vacuum, kPa; hole diameter, mm; reference time between the fall of adjacent seeds at a given rotational speed of the seeding disc, ms. During the experiment, it was found that with a value in the seed-ing chamber of 5 kPa, in the frequency range of the seed-ing disc from 17-100 rpm, the actual seeding rate was 3.28 pcs m, the number of twins in the seeding process was 8.17%, the number of gaps in the sowing process was 5.46%, and the deviation from the set rate was 5.2%. Thus, the electric drive of the seeding disc based on the brushless DC motor XF15R Mxus has shown its efficiency and may be used in the existing configuration of the MC type sowing device.

Research on LED multi-sector stable display model in variable rotational speed

To solve the display distortion caused by the motor rotational speed changes in the long-term operation of the rotating LED multi-sector display system, the model for LED multi-sector stable display (MSSD) in variable rotational speed is proposed based on the principle of visual persistence. The stepping motor subdivision driving technology is applied to the rotating LED multi-sector display, and the equal precision frequency measurement method is used for accurate rotational speed measurement. Then the innovation adaptive kalman filter (IAKF) is researched to further enhance the robustness to eliminate noise pollution, and the relationship between the modification value caused by rotational speed and the LED linear array minimum refresh time is analysed. The rotating LED MSSD system based on LED linear array rotated by stepping motor is provided. The test results reveal the relationship between rotational speed and the LED linear array minimum refresh time, and show that the lighting position of the LED can be synchronized with the lighting state during the rotational speed fluctuation, and the error can be controlled to a low level via LED linear array minimum refresh time correction. The designed model can effectively eliminate the distortion of the rotating LED multi-sector display screen caused by the changes of the motor rotational speed, and has a very stable display effect.

MOTOR CONTROLLER ARDUINO BASED 3 (THREE) PHASE

Electrical machinery plays a very important in industry and in everyday life hari. Exsitasi or starting a means used by man to ignite and drive the electrical machinery. The way or starting exsitasi electrical machines taken by man to get a good efficiency power efficiency and torque efficiency. Thus it takes a piece of equipment that is capable of performing exsitasi electrical machines with a small power with big torque. Inverter or more commonly known as VSD (Variable Speed Drive) is one option which is used in making exsitasi or starting the electric machines. The inverter is able to perform exsitasi electric machines both single phase and 3 phase with prefix absorbs very little power and have very besar.Contoller torque inverter done so fine that almost did not happen rebound flow and speed that can cause damage to the machines The electricity nor the couple or connecting circuits. In the world of industrial inverter controlled semi-automated and automated by the semi-automatic circuit. Automatic performed by a series of contactors and relays, while the control is automatically done by the PLC (Programmable Logic Control). Arduino can be used as a substitute for controlling performed by contactors, relays and PLC. Arduino able to control the start-stop, round forward and reverse rotation and control the motor rotation speed can be displayed in the display LCD (Liquid Cristal Display)

Research on Adaptive Control of Air-Borne Bolting Rigs Based on Genetic Algorithm Optimization

Rotation speed and propulsive force are the two critical parameters in the work of the air-borne bolting rig. To address the problem that unreasonable rotation speed and propulsive force will induce the breakage of the drill pipe and the inability of the drill bit to cut coal adequately this paper proposes an adaptive control strategy for the air-borne bolting rig based on genetic algorithm optimization. Firstly, we obtain the corresponding coal hardness by the real-time acquisition of the working torque of the drill pipe. Then we calculate the reasonable rotation speed of the hydraulic motor and the propulsive force of the hydraulic cylinder on the coal of different hardness. Secondly, the genetic algorithm is applied to optimize the parameters of the PID (proportion integration differentiation) controller so that the system may attain the target value fast and reliably and achieve adaptive control. Finally, a simulation model of the slewing system and the propulsion system of the air-borne bolting rig are established in the AMESim hydraulic software, and the simulation tests were carried out under two distinct working conditions: single coal hardness and coal hardness of sudden change. The results indicate that the PID control strategy based on genetic algorithm optimization has a shorter response time, a smaller overshoot, and a lower steady-state error than the traditional PID control strategy.

Thermodynamic analysis of volume flow rate ratio on the performance of a NH3/CO2 cascade refrigeration system

NH3/CO2 cascade refrigeration system is the most potential and promising selection in low temperature applications. To meet the cooling demands of CRS at various working conditions, the capacity regulation of the screw refrigeration compressor is needed. This paper specifically studied the impacts volume flow rate ratio of high temperature cycle (HTC) and low temperature cycle (LTC) on the system performance. The simulation model of CRS including energy and exergy analysis was established. Based on the obtained results with the models, it can be found that there exists an optimum volume flow ratio that makes the maximum COP and exergy efficiency and the optimum volume flow ratio value is different under various working conditions. When the evaporation temperature is -55°C the optimum volume rate ratio is about 2.4 and corresponding maximum COP and exergy efficiency of CRS is 1.031 and 0.346, respectively. The optimum condensing temperature of LTC is -9.75°C. When the volume flow ratio is increasing, which means the motor frequency or rotational speed of HTC compressor increases while the rotational speed of LTC compressor is fixed, the optimum intermediate temperature decreases and the discharge temperature of HTC compressor increases proportionally. The cooling capacity could be enhanced by increasing the volume flow ratio. The obtained results are helpful for the screw refrigeration compressor regulation in CRS under various working conditions and cooling demands.

Non-parametric dynamical estimation of blood flow rate, pressure difference and viscosity for a miniaturized blood pump.

Blood pumps are becoming increasingly important for medical devices. They are used to assist and control the blood flow and blood pressure in the patient's body. To accurately control blood pumps, information about important hydrodynamic parameters such as blood flow rate, pressure difference and viscosity is needed. These parameters are difficult to measure online. Therefore, an accurate estimation of these parameters is crucial for the effective operation of implantable blood pumps. In this study, in vitro tests with bovine blood were conducted to collect data about the non-linear dependency of blood flow rate, flow resistance (pressure difference) and whole blood viscosity on motor current and rotation speed of a prototype blood pump. Gaussian process regression models are then used to model the non-linear mappings from motor current and rotation speed to the hydrodynamic variables of interest. The performance of the estimation is evaluated for all three variables and shows very high accuracy. For blood flow rate - correlation coefficient ( = 1, root mean squared error () = 0.31 ml min-1, maximal error () = 9.31 ml min-1; for pressure = 1, = 0.09 mmHg, = 8.34 mmHg; and for viscosity = 1, = 0.09 mPa.s, = 0.31 mPa⋅s. The current findings suggest that this method can be employed for highly accurate online estimation of essential hydrodynamic parameters for implantable blood pumps.

Параметрическая оптимизация системы автоматического регулирования частоты вращения вала двигателя постоянного тока судна

DC motor speed control can be done either manually or by using an automatic controlling tool. In order to perform parametric optimization of a DC motor rotational speed automatic control system, we have developed a simplified methodology. The said methodology is able to obtain a transfer function for an automatic control system being based on several initially given system parameters. It is a tree-step way according to the research goals. We offer model patterns where parameters can be designated. Time constant for a PI controller is being presented by a process time constant for a controlled DC motor for the purpose of this particular research.

Design and Control Method of a Planar Omnidirectional Crawler Mechanism

AbstractOmnidirectional mobility is a popular method of moving in narrow spaces. In particular, the planar omnidirectional crawler previously developed by the authors can traverse unstable and uneven terrain with a large contact area. A novel point is that the proposed system is unique in its ability to carry heavy loads in all directions without getting stuck because of the large pressure-receiving area between the crawler and the ground. This work will facilitate omnidirectional motion, which has important implications for the use of robots in spaces such as not only factories, distribution centers, and warehouses but also soft soil in disaster sites. The objective of the present study was to establish a design and control method for an omnidirectional crawler mechanism that can conduct holonomic and two-axis cross-driving. Only two motors are set on the crawler base for translation in the X- and Y-directions, and two large crawler units are arranged for turning. We design a small crawler that has higher traversing ability with a derailment prevention mechanism and tapered track. Further, the relationship between the motor rotational speed as input and crawler velocity as output was verified for control. In addition, it was demonstrated experimentally that the proposed crawler could travel across various types of rough terrain in a target direction.

A Low-Cost Non-Intrusive Method for In-Field Motor Speed Measurement Based on a Smartphone.

Induction motors are broadly used as drivers of a large variety of industrial equipment. A proper measurement of the motor rotation speed is essential to monitor the performance of most industrial drives. As an example, the measurement of rotor speed is a simple and broadly used industrial method to estimate the motor’s efficiency or mechanical load. In this work, a new low-cost non-intrusive method for in-field motor speed measurement, based on the spectral analysis of the motor audible noise, is proposed. The motor noise is acquired using a smartphone and processed by a MATLAB-based routine, which determines the rotation speed by identifying the rotor shaft mechanical frequency from the harmonic spectrum of the noise signal. This work intends to test the hypothesis that the emitted motor noise, like mechanical vibrations, contains a frequency component due to the rotation speed which, to the authors’ knowledge, has thus far been disregarded for the purpose of speed measurement. The experimental results of a variety of tests, from no load to full load, including the use of a frequency converter, found that relative errors on the speed estimation were always lower than 0.151%. These findings proved the versatility, robustness, and accuracy of the proposed method.

Simple Design of Control Motor AC for Rotary Force spinning

The use of rotary forcespinning in the manufacture of nanofibers should receive special attention because of its ability to produce fibers with high production rates and can be applied to both solution and melt form materials. To produce fiber, this rotary forcespinning technique utilizes centrifugal force emanating from a high-speed, large-torque motor rotation. AC motor is an option in fulfilling the need for fiber manufacturing using this system. The amount of torque and the high maximum rotation speed of the motorbike provides an answer to the needs of the rotary forcespinning system. However, behind the advantages of these motors, controlling the motor rotation speed is a separate problem that needs to be resolved. Therefore the aim of this research is to create a simple system to control AC motors by utilizing a microcontroller system and an AC dimmer circuit that functions to regulate the AC voltage that enters the motor. The results obtained indicate that the simple system design can produce rotation on an AC motor with good linearity, although the error value obtained is still high and needs further refinement.

Uji Getaran Rangka Tabung Sentrifugal Mesin Produksi Santan Kapasitas 10 Liter Per Jam

Abstract Coconut plantations reach more than 106 hectares of the 831 thousand hectares of plantation areas in Aceh. Meanwhile, the total production reached 63 thousand tons with a productivity level of 818 kilograms per hectare. Most of it is still traditionally produced to produce coconut milk from these coconuts. The design of the coconut milk production machine has been carried out and before it is used a vibration test must be carried out to determine the operational feasibility of the machine. This study aims to measure the vibration level of the centrifugal tube frame for the coconut milk production machine with a centrifugal system capacity of 10 L / hour. The test was carried out at three levels of motor rotation, namely 1000 rpm, 1500 rpm and 2000 rpm with repeated measurements carried out five times at each motor rotation speed, the measurement results were compared with ISO 2631-1 standards and Kepmenaker number KEP-51 / MEN / I999. The results showed that testing the vibration of a coconut milk production machine with a centrifugal system with a capacity of 10 L / hour stated that it was safe if it was operated for less than 4 hours for a motor rotating speed of 1000 rpm, for a motor rotating speed of 1500 rpm it was safe to use if it was operated for less than 3 hours, while for rotation 2000 rpm motor is good and comfortable to use for less than 2 hours. Keywords— centrifugal tube, coconut squeezer, SO 2631-1, KEP–51/MEN/I999

Studi Pengaruh Kecepatan Motor Dan Jumlah Bilah Pisau Terhadap Hasil Potongan Rumput

Unwanted grass growth on land will cause problems for humans. Generally, the sickle is a tool that is often used to cut grass. The use of a sickle has several disadvantages, namely using manual labor, in some cases there is a narrow-angle that makes it impossible to cut with a sickle. This study uses variations of 2, 3, and 4 blades with motor rotation speeds of 666 RPM, 1713 RPM, and 3454 RPM. The data collection method is done by determining the mass of grass by 25 grams, then the grass is arranged and moved closer to the blade with a cutting time of 10 seconds. The shortest cut grass results were obtained on the number of blades 4 with a motor rotation speed of 3454 RPM, which is 10.92 mm. The difference in mass of grass clippings in the variation of blade 4 with RPM 1 and 3, which is 4 grams, indicates the overall cut grass
 Keywords: blade, motor rotation speed, grass cutted

Pengaruh Dimensi Ujung Pemukul Terhadap Penggilingan Kulit Kerang Dengan Mesin Hammer Mill


 Hammer mill is a machine for crushing hard materials and flour. By modifying the hammer shapes and varying the motor rotation speed, it is hoped that it will be able to crush the shells into powder with different product dimensions. The quality of the product produced will describe the performance of the hammer mill machine. Experiments were carried out by making the ends of the batter dimensions 1, 2 and 3 cm with a motor speed of 1000 rpm, 1100 rpm and 1200 rpm. The highest yield of the 3 cm bat type is at 1200 rpm at 96.7%.
 
 Keywords: Clamshell, Hammer Mill

Analysis of flow field characteristics of multi-degree-of-freedom motor with air-floatation

In order to combine the working performance of the motor and the specific requirements for accuracy, a model combining gas bearing with multi-degree-of-freedom (MDOF) motor is invoked. The bearing structure is optimized in terms of lubrication characteristics, which makes the motor life and deflection accuracy have been significantly improved. This kind of special bearing mainly provides a certain supporting force for the motor. Its stability directly affects the output performance of the motor. It should be ensured that the bearing can be used as a stable supporting structure. This paper mainly analyzes the flow field characteristics of this kind of motor, and discusses the stability of the motor by changing the gas film thickness and the motor rotor speed. Firstly, the structure and basic parameters of the air bearing motor are introduced, and the role of the bearing in the motor is described. Then, the film flow field is analyzed theoretically and simulated by finite element software. Finally, the experimental platform of gas bearing stability is built to verify the rationality of finite element analysis. The results provide references for the application of gas bearings in MDOF motors, and provide a direction for the development of precision in MDOF motors.