Apr 02, 2009 you can start to design from a small fractional horse power ac electric motor to a 200 hp ac electric motor using this design software. Induction motor winding data analyzer for ios free download. Claims that rewinding inevitably decreases the efficiency of induction motors are. This software is intended to be used by motor repairrewinding technicians, motor maintenance engineers and professors dealing with electrical machines courses. In order to facilitate the redesign process of the motor stator windings and to help repairersrewinders improving the motor efficiency, a software tool was developed in 2004, named bobisoft. Assumptions used in the preparation of this table include an expected 2 percent loss in an average standard motor efficiency due to rewinding, replacement with an average energyefficient motor operated at a 75 percent load factor, and a list price discount rate of 65 percent. For brushless dc motor electromechanical simulation it is usually sufficient to conduct a 2d design analysis with magneto. Use a screwdriver to pry open the tabs on the brush pads. The dynamics of your load is something that motor equations wont help with. Inductors are used in a variety of electrical devices including. Emetor free resources for electrical machine design.
This article discusses what is a motor winding, types, and its calculation. Due to the design of the motor, it reaches full torque at 0 output speed, or locked rotor condition. Motor cad multiphysics design toolkit iterate, innovate and explore the whole design space. The first copy of this software is free to active and allied members. The calculation will be performed for the aircooled, threephase motors for continuous duty cycle s1, standard efficiency, 50 or 60 hz, sf 1. Using a torque motor for winding and unwinding type applications. The singlephase induction motor is more subtle and less efficient.
To rewind an electric motor, remove the motor s outer housing and use your hands to pull the armature out of the stator. The number of turns of the coil wire determines the inductance value. An electric motor is an electrical apparatus that converts electrical activity into automated energy. Most of the time we glance at the user manual once, and then we put that little booklet away in order that we are able to still find it easily whenever we have to have it. If you are searching for rewinding of one phase motor you can find it here. Jan 31, 2015 help diploma of associate engineering d. Get an explanation of electrical machine design terms. The threephase induction motor is the easiest motor of this type to understand so these notes start with that type. Try to bend the tabs as little as possible to avoid damaging them. Pdf in order to facilitate the redesign process of the motor stator windings. On some motors, there may be as many as 1216 tabs in total. The reply is to give a start point for your education, on this subject.
Motor rewinding is an application for individuals who wishes to learn how to recoil or repair an electric motor. Tutorials and troubleshooting for ac motor verification. Tutorial for using the motor data calculator mobile app available for ios and android devices. It will walk you through the new motor wizard, entering original winding and mechanical data, as well as entering desired redesign data. Simply rewinding a preepact motor could be less costly, but the energy savings seen on a newer premium efficient motor will offer tremendous energy savings over the life of the motor. This valuable resource is available only to easa members.
A torque motor is an excellent product for winding and unwinding type applications. Please, provide as much info as possible, in order that well be able to make a reliable calculation. Single phase motor schematics and working do follow the links as your question is too simple to make a proper re. Combined stardelta windings in electrical machines result in a higher fundamental winding factor and cause a smaller spatial harmonic content. Alternating current ac and direct current dc motors employ an insulated, currentcarrying coil essential to their operation. Motor cad is the worldleading dedicated electric motor design software package for the multiphysics simulation of electrical machines across the full torquespeed range. A guide to maintenance practices for small horsepower vering construction control and maintenance, including armature winding. Software tool for fast and optimized stator winding design of. This software is intended to be used by motor repair rewinding technicians, motor maintenance engineers and professors dealing with electrical machines courses. You have the options to change any of the values from output design data to match your specifications and need. Bobisoft is a technical software to design and optimize threephase windings of induction motors, potentially leading to significant improvements in the. In this paper,the motor flux and torque static data of a 128 threephase switched reluctance motor are calculated by finite element analysis software ansoft.
This is the story about how i did just that and how you can do it too. Winding layout, single layer winding, induction motors, rewinding technique, three phase motor. Rewiring a dc motor is not difficult and can be quite rewarding depending on what a person wishes to achieve. Hello everyone, i am niko and, in this instructables i will show you, how to rewind and renew old three phase electric motor. Winding design, modeling, and control for polephase modulation induction motors article pdf available in ieee transactions on magnetics 492.
So you also need to put a number on operating torque. Charles dix, account manager, holland industrial, points out that the size of the motor can have a direct impact on cost. Compare winding layout, winding factor, etc for fractionalslot, integerslot and concentrated electric motor windings. It also includes the cutting of coils, checking the insulation, baking of newly wound motor, varnishing, rewinding, testing and dismantling. Feb 21, 2018 full rewinding 36slot single phase 3hp motor rpm 1440. Bobisoft is a technical software to design and optimize threephase windings of induction motors, potentially leading to significant improvements in the motor efficiency. That would allow you to calculate an approximate number of winding turns for each winding distribution alternative that you wish to consider. Pdf software tool for fast and optimized stator winding design. How to calculate winding data of a motor for particular hp.
Wedge the tip of a flatblade screwdriver underneath the thin metal tabs, then pull up gently on the handle to lift them enough to loosen the coiled wire. Small eurodrive motors arent cost effective to rewind. How an induction motor works by equations and physics. If you dont known anything about assembling transformers, please dont use calculations from this program for building your own transformer. Here are some of the things a designer needs to know in order to make an accurate winding calculation. Here we see a winding diagram for a 3phase ac induction motor or brushless. Electric motor rewind and repair whitelegg machines. Find the optimum winding layout or check the performance of your windings. The application is made up of seven steps that makes up the whole rewinding process. How to calculate new dc motor parameters of a modified winding. This version of the easa motor rewind database software takes a large leap forward with the data that it provides members. Mar, 2011 dear my motor is permanent magnet brushed motor.
Torque motors for winding and unwinding applications. Compared to similar software for the motor designredesign in rewind shops, our program is much more comprehensive, because it provides everything you need in motor repairing. You will have to carry out the balance exploration yourself. Calculation method of threephase induction machines equipped. To use this application, a basic knowledge of electrical technology is recommended. In next steps i will show you how to analyse motors winding, disassemble motor, remove bearings, calculate new winding, rewind motor, reassemble it with new bearings and test motor. Mitis motor rewinding course demonstrates the complete skills and knowledge required to safely and productively rewind and repair electric rotating machinery, transformers, and related electrical apparatus. Using the motor data calculator mobile app schneider electric.
If you know the maximum flux density and the size of the air gap, you can calculate the airgap flux per pole. Apr, 2011 the dynamics of your load is something that motor equations wont help with. Rewinding a dc brushtype motor v is for voltage electric. Twodimensional arrays of current twodimensional arrays of torque about winding current and rotor position. An inductor is a iron core with coils of wire wrapped around it. You can start to design from a small fractional horse power ac electric motor to a 200 hp ac electric motor using this design software. Full rewinding 36slot single phase 3hp motor rpm 1440. Salient features of ht transformer design software packages. Electric motor winding calculator the winding calculator allows you to find the optimum winding layout for your electric motor in a fast and convenient way. Motorcad is the worldleading dedicated electric motor design software package for the multiphysics simulation of electrical machines across the full torquespeed range. Winding design, modeling, and control for polephase. Threephase ac winding calculations singlespeed windings.
If you have some experience in assembling transformers, then this program is perfect for you. Dc motor winding turns, wire diameter calculation rc groups. The magnetic field in the air gap from the voltage applied to the stator. Aug 19, 2019 use a screwdriver to pry open the tabs on the brush pads. In next steps i will show you how to analyse motors winding, disassemble motor, remove bearings, calculate new winding, rewind motor, reassemble it with new. In this insctructables, i am going to make step forward. Transformer calculation software electronic circuits. Most notably, it now has the ability to connect to a live, everexpanding online database of more than 250,000 windings. Nov 19, 2009 threephase ac winding calculations singlespeed windings kinds of diagrams this calculations program includes all necessary details for rewinding threephase motors. Motorcad multiphysics design toolkit iterate, innovate and explore the whole design space. I should mention though, that the process is rather difficult though doable and buying the stocks of wire and other materials required, wasnt cheap. Electrical winding wire is used to create inductors. The classification of motors can be done with considerations like the type of power source, construction, motion output type, and applications.
Circuit breaker,guard,driver part,current as well as schematic diagram. In next steps i will show you how do disassemble electric motor, remove bearings, make winding diagram, rewind motor, chose right capacitor and reassemble it with new bearings. If you supply more info you may get a more accurate answer. This ipad tool offers to the shop engineer and rewind technician the possibility of checking the different winding configurations for induction motors and. This might be a disadvantage to an engineer calculating the winding. The traditional method for motor rewinding involves removing the old coil, winding a new coil and varnishing. If you dont know anything about assembling transformers, please dont use calculations from this program for building your own transformer. Threephase ac winding calculations singlespeed windings kinds of diagrams this calculations program includes all necessary details for rewinding threephase motors.
Based on the input data this app gives you high level motor circuits schematic diagram. Most notably, it now has the ability to connect to a live, everexpanding online database of. Emetor is a collection of valuable resources for designing electrical motors and generators. Electric motor design itself is a very complex undertaking and is not meant for the novice. Htlt powerdistribution transformer design software. Electrical induction motor winding design software just about everything that you just find or searching incorporates electrical induction motor winding design software. A torque motor can act as a brake when back driven, or a simple device to provide tension. If it is necessary to include the effects of flux leakage at the ends of the motor, then amperes should be used as the cae software. Calculation method of threephase induction machines equipped with combined stardelta windings abstract. This calculations program includes all necessary details for rewinding. Transformer calculation is program for calculating number of coils and wire thickness at transformer. Dc motor winding turns, wire diameter calculation rc. Download transformer calculator coils and wire thickness at.
Winding service and design winding data calculation. Voltage, power, powerfactor, efficiency, start mode output. Software for threephase induction motor stator winding design. With double the input power at the same rpm, hopefully youll operate at least double the torque, otherwise efficiency will be lower than the original. Whitelegg machines world class wire and electrical engineering solutions, based in the uk. How to calculate new dc motor parameters of a modified winding dc servomotor users sometimes find themselves with the right motor envelope, but the wrong winding characteristics for the job at hand. You can investigate threephase integerslot, fractionalslot and concentrated windings, both with single and double winding layers where appropriate. All types motor rewinding formula and turns calculation. Sep 23, 2019 motor rewinding is an application for individuals who wishes to learn how to recoil or repair an electric motor.
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