Automatic dol starter with programmable timer.
In this modern age automation is taking place in every field of life. This automatic DOL starter of 3 phase induction motor is also a work in this automation process. Induction motors find their application in vast field of engineering and daily life. This paper implements a device which provides automation to the 3 phase induction operation. Due to wide range of application induction motor automation in working of induction motor will cover a wide area of automation.
Individual work on dol starter and star-delta starter for induction motor by using hardware and MATLAB Simulink .The purpose of this paper is tofind out the good starter during the starting of induction motor or on-load condition.These two basic starting methods which are different but commonly used for squirrelcage induction motor. This project is done by including MATLAB simulation as wellas dol starter on hardware. After the simulation, the two different startingmethods for starting of a rotating transformer or asynchronous machine are beingindividually deliberate to conclude the most appropriated and starting method of three phase induction motor.
The High Torque Low Current Starter is the new innovative motor soft starter system. This is a motor starting method for high inertia loads using a low voltage drive with input and output transformers to control motor torque and limit current when starting a medium/high voltage motor. The HTLC is a solution to motor starting problems where Direct on Line (DOL) or "Across the Line" starting is not feasible due to high in-rush current causing problems on the distribution system or where a reduced voltage starter cannot provide enough torque to achieve breakaway and accelerate the motor to full speed. The main features of HTLC starter system are reduction of starting inrush current from 600% to 10% and over 60% breakaway torque available during starting, significantly less costly than a fully rated VFD and multiple motors can be started from a single HTLC. The standard Synchronous motor, those designed for Line Supply and fixed speed, have brushless dc excitation and use built in induction motor features for starting.
Electrical apparatuses, systems and methods involving battery boost circuitry configured to charge a supercapacitor to a regulated voltage different from the battery voltage and apply a series combination of the regulated voltage and the battery voltage to a load such as a starter motor for an internal combustion engine or a component of a handheld device. Automatic dol starter with programmable timer.The circuitry also includes a contactor connected to the supercapacitor and operable to bypass the capacitor when fully discharged to avoid reverse charging of the supercapacitor.
This is because the electric motor is one of the systems of equipment that converts electrical energy into mechanical.To run an electric motor is need for control, there are various types of electric motor control depending on the function of the motor, the motor slurry pumps At FC PM-4A starting the use is starting direct On Line (DOL) or starting directly. With DOL Starter method on three-phase motors, the starting current that goes into the motor of 1404 A, the reason the use of Direct On Line starting as a function of the motor slurry pumps which require large starting torque. The voltage drop when the motor is turned on dol starter is not a problem because it does not cross the line under-voltage allowable tolerance. Keywords:, Induction Motors, Starting DOL, Current Starting
The basic requirement for studying starting analysis of Induction motor are the starting current of Induction motor and the voltage flicker during start up. This paper will summarize several common methods and provide application guidelines for proper selection of starting devices. Starting method reviewed will include different types of starters, comparative study of results obtained in laboratory & results obtained by simulation in ETAP (Electrical Transient Analyzer Program) for DOL starter & autotransformer starter, simulation results are also obtained for different cable length, with & without capacitor connected across motor itself. Finally it is concluded that starting current is less in case of autotransformer starter. Starting current & starting time can be further reduced and voltage profile can be improved with the use of capacitor at the motor terminal as a compensating device.
Our project we have introduced a system which controls the water pump in the green houses automatically by using sensors and GSM module. Microcontroller AT89s51 is used as main control element in this system. The monitoring and controlling system is developed in this project. That can be used in green house applications, where real time data of whether conditions and other environmental elements are sensed. Then monitoring system can take decision and system sends SMS to user automatically.Key words: Sensors, LM35, AT89C51, GSM, Relay, ADC, DOL starter.Jam Nut (Spr. Adj. Screw) for PSV, Model:26QB10-120/N1/SP, Set P:,0.35Mpa size:6X8, Back Pressure:, serial number: 801093-1-A11 : Manufacturer : CURTISS WRIGHT TIANJIN FLOW CONTROL CO LTD 1 EA
Stem for PSV, Model:26QB10-120/N1/SP, Set P:,0.35Mpa size:6X8, Back Pressure:, serial number: 801093-1-A11 : Manufacturer : CURTISS WRIGHT TIANJIN FLOW CONTROL CO LTD 1 EA
Sleeve Guide for PSV, Model:26QB10-120/N1/SP, Set P:,0.35Mpa size:6X8, Back Pressure:, serial number: 801093-1-A11 : Manufacturer : CURTISS WRIGHT TIANJIN FLOW CONTROL CO LTD 1 EA
Disc Holder for PSV, Model:26QB10-120/N1/SP, Set P:,0.35Mpa size:6X8, Back Pressure:, serial number: 801093-1-A11 : Manufacturer : CURTISS WRIGHT TIANJIN FLOW CONTROL CO LTD 1 EA
Nozzle for PSV, Model:26QB10-120/N1/SP, Set P:,0.35Mpa size:6X8, Back Pressure:, serial number: 801093-1-A11 : Manufacturer : CURTISS WRIGHT TIANJIN FLOW CONTROL CO LTD 1 EA
Disc for PSV, Model:26QB10-120/N1/SP, Set P:,0.35Mpa size:6X8, Back Pressure:, serial number: 801093-1-A11 : Manufacturer : CURTISS WRIGHT TIANJIN FLOW CONTROL CO LTD 1 EA
This chapter discusses the fundamentals of control circuits, types of control circuits, and ways to troubleshoot them. Basic control circuits are used in starting, stopping, sequencing, and safety automatic interlocking of equipment and machines. The control circuit consists of relays, relay contacts, contactors, timers, and counters. Control circuits can also be configured or programmed in the programmable logic controllers (PLCs). This is done, using ladder logic diagram, statement lists, or control flowcharts software, by representing the logical conditions, sequences, and interlocks required for operating equipment or a machine in an automatic sequence. To understand how to troubleshoot control circuits, it is very important to understand the working of some basic control circuits. This chapter presents a typical circuit for a direct-on-line (DOL) starter for a three-phase motor. Moreover, the designing, programming, testing, commissioning, troubleshooting, and maintenance of control logic are much easier using the ladder logic programs in a PLC.
Polyethylene production requires high power multiple pole machines for ethylene gas compression. In most cases the machines are started DOL implying in high starting currents, additional mechanical stresses, influence on other loads, limitation of the number of consecutive starts and reduction of equipment's lifetime.
These results in a voltage drop in other physical systems connected to the same source and high electrical stress on the windings of the motor. In this research, the performance of two solid-state soft starters (IGBT &MOSFET) with a dol starter for a three-phase induction motor in a close loop system are evaluated and compared. The research work lies in the use of extinction angle control and development of models for a close loop system on Matlab/Simulink for simulation purposes in order to determine the performance evaluation of the DOL and the solid state soft starters.Automatic dol starter with programmable timer. The fuzzy logic controller is used to perform the system feedback. The following parameters were observed in the system with feedback: Starting Current, Speed, Torque, Total Harmonic Distortion, and Power Factor.
Different starting methods are employed for starting induction motors because Induction Motor draws more starting current during starting. To prevent damage to the windings due to the high starting current flow, we employ different types of starters. The simplest form of motor starter for the induction motor is the Direct On Line starter. The DOL starter consist a MCCB or Circuit Breaker, Contactor and an overload relay for protection. Electromagnetic contactor which can be opened by the thermal overload relay under fault conditions. Typically, the contactor will be controlled by separate start and stop buttons, and an auxiliary contact on the contactor is used, across the start button, as a hold in contact. I.e. the contactor is electrically latched closed while the motor is operating. Most induction motors are started directly on line, but when very large motors are started that way, they cause a disturbance of voltage on the supply lines due to large starting current surges.
A mathematical model of Distribution STATCOM has been implemented in MATLAB/Simulink to validate its capability for mitigation of voltage sag due to DOL starting of induction motor. This paper organized with brief introduction to voltage sag problem followed by characteristics of voltage sag, basic structure & operation of D-STATCOM. The model is subjected to, first without D-STATCOM and then with it. The results obtained in both the cases are analyzed. Based on this analysis the capability of D-STATCOM to mitigate the voltage sag due to DOL starting of IM is validated.
Practically there is no point in leave usage of DOL and R-DOL circuits in stations that include different various types of motors due to its importance to start rotation and reverse direction of specific motors. Nevertheless, curry out of DOL and its reverse on synchronous and induction generally need much more works and efforts and it is not easy to implement in general commercial work stations or remote fields. On contrary, applied of DOL and R-DOL in PLC is proposed way to be applied and identify of its components on this work that regard as peripherals to PLC. Pico PLC will be employing to this purpose. Simplify of programming circuit written codes caused by ladder language and applied by software name's Picosoft version 6 for this project case. Many development countries began using PLC in its industrial field in a jiffy. In this article, there is a providing for simulation, circuit diagram and communication for DOL and R-DOL circuit by PLC and its result on board separately.
Now intelligent soft-starter is developed to improve the performance of conventional starter. This paper focused on the designing of an artificial neural network controlled soft-starter. Back-propagation algorithm is used as learning algorithm in the artificial neural network. Error correcting capability of this learning algorithm makes it more suitable to use in neural network. For comparative performance analysis two different types of back propagation algorithms are used in the neural network learning process. According to condition of learning rate parameter gradient descent with momentum back-propagation algorithm provide better response. A comparative study between conventional starting method (Direct on Line)and proposed soft-starter. Artificial Neural Network controlled soft-starter is able to reduce starting current compared with DOL method.
Evidence exists that a thriving manufacturing sector increases the number of stable, well-paying jobs leading to the growth of the US economy. The manufacturing industry is the fifth largest employer in Massachusetts and benefits from the state's diversified economy, according to a recent Jobs For the Future (JFF) report. At the same time, several states in the US, including Massachusetts, are consistently reporting a skills gap that results in a shortage of a skilled workforce leading to thousands of unfilled positions in this sector. This paper describes an innovative approach that prepares college graduates to launch a second career in the growing advanced manufacturing sector while bringing together various stakeholders including higher education institutions, workforce investment boards and industry. The paper describes the range of services provided to students in the new manufacturing certificate programs at a community college in Massachusetts and opportunities that exist for additional collaboration.
The main objective of this project is to design a soft Conventional Techniques DOL Starting starter for consumer application, Gsm technology is used to get the voltage readings through mobile, The power theft also identified here by means of voltage measurement is presented in this paper. Here thyristor is used as soft switch. Three soft switches are used in three phases which is Star, Delta and Main phase. With the help of Gsm technology the motor is controlled through the mobile. The performance resulted from the past fault-tolerant soft starter control has demonstrated reduced motor starting transient torque pulsations as well as reduced motor inrush current magnitude. TheA medium-voltage (MV) motor startup current isnormally smaller in per unit than a low-voltage motor startupcurrent. The ratio of the transient inrush current to the lockedrotor current is generally higher for large MV motors comparedwith low voltage motors (the ratio increases with motor sizebecause of the decreasing locked rotor power factor). It isdifficult to manage the effects of the thermal
After manpower, energy is the highest operating cost item for most water and wastewater companies. Over the last decade, energy consumption by the sector has increased considerably as a consequence of the implementation of new technologies to meet new potable water and effluent treatment quality standards. The price of energy has also increased substantially in the same period.These increases will be compounded by the need to meet future changes to regulations and standards that will require additional energy intensive processes to achieve more exacting requirements. High energy consumption will affect the water industry world wide and is inextricably linked to the issue of Climate Change.This international research project has focused on identifying current energy efficient best practices and technologies in the efficient design and operation of water industry assets for the whole water cycle from abstraction to discharge, including water treatment and distribution, wastewater conveyance and treatment.
TheType HFSR(Harmonic Free Series Reactor) soft-starters are the Best soft starters based on latest IS guide Iines with the use of the Jayashree Soft starter an Induction motor is started in a smooth jerk less fashion with less starting current compared to DOL starter. The soft-starter incorporates special, uniquely designed core less Reactors to shift the motor/load torque characteristics. Due to coreless design it does not produce any harmonics and hence is better than an Autotransformer or Iron core type Reactor soft starters. The soft-starting process helps to reduce cost on Cables, Supply transformer/generators. Automatic dol starter with programmable timer.It reduces wear and tear of motor transmission parts and increases life of total system.Jam Nut (Spr. Adj. Screw) for PSV, Model:26QB10-120/N1/SP, Set P:,0.35Mpa size:6X8, Back Pressure:, serial number: 801093-1-A11 : Manufacturer : CURTISS WRIGHT TIANJIN FLOW CONTROL CO LTD 1 EA
Stem for PSV, Model:26QB10-120/N1/SP, Set P:,0.35Mpa size:6X8, Back Pressure:, serial number: 801093-1-A11 : Manufacturer : CURTISS WRIGHT TIANJIN FLOW CONTROL CO LTD 1 EA
Sleeve Guide for PSV, Model:26QB10-120/N1/SP, Set P:,0.35Mpa size:6X8, Back Pressure:, serial number: 801093-1-A11 : Manufacturer : CURTISS WRIGHT TIANJIN FLOW CONTROL CO LTD 1 EA
Disc Holder for PSV, Model:26QB10-120/N1/SP, Set P:,0.35Mpa size:6X8, Back Pressure:, serial number: 801093-1-A11 : Manufacturer : CURTISS WRIGHT TIANJIN FLOW CONTROL CO LTD 1 EA
Nozzle for PSV, Model:26QB10-120/N1/SP, Set P:,0.35Mpa size:6X8, Back Pressure:, serial number: 801093-1-A11 : Manufacturer : CURTISS WRIGHT TIANJIN FLOW CONTROL CO LTD 1 EA
Disc for PSV, Model:26QB10-120/N1/SP, Set P:,0.35Mpa size:6X8, Back Pressure:, serial number: 801093-1-A11 : Manufacturer : CURTISS WRIGHT TIANJIN FLOW CONTROL CO LTD 1 EA
Arus yang besar akan menghasilkan panas yang besar pula, panas ini dapat merusak motor itu sendiri dan tujuan penelitian ini agar dapat mencari metode pengasutan yang tepat untuk mengurangi arus start yang besar pada motor. Pengasutan pada motor induksi 3 fasa mempunyai beberapa metode yaitu Direct On Line (DOL), star-delta, auto trafo dan soft starter. Untuk dapat mengetahui arus start motor dapat menggunakan metode simulasi dengan software ETAP Power Station. Dari hasil simulasi yang dilakukan menggunakan ETAP didapatkan hasil sebagai berikut, untuk metode pengasutan direct on line (DOL) diperoleh arus start sebesar 2807,9 A atau 5,25 kali arus nominal dan voltage dip pada bus sebesar 14,88%. Untuk metode star-delta diperoleh arus start 1039,2 A atau 2,12 kali arus nominal dan voltage dip pada bus sebesar 5,51%. Untuk metode auto trafo diperoleh arus start sebesar 790,2 A atau 1,61 kali arus nominal dan voltage dip sebesar 4,19%.
