Make model of coil. Then remove second cover. Hello everyone, i am Niko and, in this instructables i will show you, how to rewind and renew old three phase electric motor. 6 months ago. Use puller to remove bearings on both sides. Heat up cooking oven to 100 °C. plz explain , how to connect contactor to ODU (AC instalation). Careful place coils in stators slots. I took refurbished motor to university to make measurements. This can take a long time to do. It's amazing the amount of effort and detail work that goes into it. Put motor in it. I remade winding diagram from book, so it fits into my stator. How to wire One phase motor with circuit breaker? You get iron filling factor from upper table. Hi in this case did you use the contactor as a starter or to break the circuit? 9 months ago Because gap between stator and cover was very small, i decided to do a little bit bigger first coils, and a little bit smaller last coils. This time winding was too big and i couldn't close the cover of motor. https://www.youtube.com/results?search_query=indians+rewind+motors, https://www.youtube.com/watch?v=bsS_7EEYx1Y. Did you make this project? 1. You can easily remove old colour form motor with sandblasting. Three phase asynchronous motor is most common used motor in the world. on Introduction, Tanks alot sir giving briefly explanation . Free 3d model of winding tools are available on "Rewinding one phase motor" instructables. In second line is measurement at 380V and third line at 400V. Can you explain the connection of the 4 windings per phase? Rotor is usually made as squirrel-cage, and it is inserted in stators hole. External diameter of statros package: Dv= 128mm; Inner diameter of stators package: D= 75.5mm; Width of stators slot: b1= 6.621mm; b2= 8,5mm. There is obviously a multiple to understand about this. Take few picture of motor. You can gently hit rotors axis with rubber hammer. For this job use hammer and chisels. Fantastic detail. We mounted motor on special test device, and connected it with measurement equipment. Rewinding 3 Phase Motor: Hello everyone, i am Niko and, in this instructables i will show you, how to rewind and renew old three phase electric motor.If you are searching for rewinding of one phase motor you can find it here.In this insctructables, i am going to make step f… Are these series, parallel, or parallel-series connected? Use screwdriver to bend it and insert it in gap. Take motor out and clean edge (so cover will fit perfectly). I chose type of winding based on my motors specifications. on Step 40. Make sure you don't paint inscription board. Reply Working as an industrial electrician this is counter productive vs purchasing a new one. When motor heats up, spills lacquer on motors coils as you see on pictures, 5. Resistances of three winding should be same (+/- 5%). If you cant find it, you can measure it and find number in catalogue on internet. Place model in right slots, leaving some free space. Question i.e. Distribution Board Wiring Diagram For Single Phase Wiring, How to Control a Lamp / Light Bulb from Two places Using Two Way switches For Staircase Lighting Circuit, Contactor Wiring Diagram For 3 Phase Motor with Overload relay, Forward Reverse Motor Control Diagram For 3 Phase Motor. Heat up winding with flame torch to burn out the rest of lacquer. on Step 35, Answer These seem to be in series but it is not addressed in the text. I plan on having our apprentice look through this and also work through the calculations. Measure length of slot, and add about 16mm (depends of how you will twist paper). But yes there are companies out there that specialise in motor testing and rewinding. Put motor in hot oven, and cook it for about 4 hours. In next step you will need to heat up old coils, and conduit box must be empty. In step 40 - I believe your indication of the magnetic poles is reversed - the North should be to the top for current flow as shown (into the page on the right).Can you elaborate on the connections of the windings? Connect end of coils to clips, according to picture from analyse motor. I took all electrical equations and orientation tables from book: Neven Srb ELEKTROMOTORI. 1 year ago One pole surface is exactly half surface of stator, that is because i have 2 pole motor. To get right filing factor you need to have surface of your slot. I feel you made few salubrious points in Attributes moreover. Then you easily write down filling factor from upper graph. EASA, working alongside members of AEMT, have published the second in a series of studies that examine the effect rewinding has on an electric motor's efficiency.This study, which focuses on Premium Efficiency/IE3 motors, supports similar results found in the 2003 study: Motors can be repaired without reducing … First i made coils too small, and i couldn't insert last coils in slots. Did you compare your calculated number of turns per slot (62) to the number removed from the old winding? That's why motor speed is a little bit less then magnetic field speed ((3000 rpm [Magnetic field] -- 2810 rpm [Electric motor])). Mark spots between first cover and stator and second cower and stator (we will need this marked points at motors assemble). If that wont works, heat it. Also single phase induction motor will not come into IE2 class. Pole surface is marked red on picture two. You must be careful because you can easily damage the axis of rotor. For DC motors, changing direction simply involves reversing the armature leads. Answer First you need to cut old winding from stator. Stator is used to generate magnetic field. You find type of bearing on side of bearing. We will do bearings and seals on any size motor but when rewinding is upwards of 70%+ of new when rewinding below 10hp, it just doesn’t make sense. Usually they are attached on stator by long screws. Typically we will only rewind over 10hp. Each one is drown for different amount of pole pairs. you can get it as an example and do it with all types of motors like single-phase and three-phase. For an AC three-phase motor, you need to swap any two of the power leads (usually 1 and 3 are chosen), while for a single-phase motor you will need to refer to the manufacturer instructions or seek the assistance of a certified electric motor … Measure resistance for each winding, resistance between two different winding and resistance between winding and motors frame. If a three-phase motor has been submerged in water but not energized, there’s a good chance it won’t need rewinding or replacing. Stator is made out of iron core and winding. Put isolate paper on table, and place ruler on it, so you get about 4mm gap in witch you will insert isolate paper and then twist it. Question If you cant separate cover and stator you can use rubber hammer. Bind the coils with the stator lacing thread. Put ventilator and last cover on motor. Be gently so you don't damage wires lacquer. I see some light colored lines on the winding diagram - are those connection points? If you are searching for rewinding of one phase motor you can find it here. If you have any questions please ask, and i will try to answer ass soon as possible. Solder and isolate them. Remove covers from motor. Remove ventilator from rotors axis. I had a lot of problems with calculation but i solved them and i got same parameters of winding as were on old one. We may Also derive 3 Phase 3 Wire System from Star Connection: Three phase three wire system is derived from Delta Connections (3-Phase, 3 Wires System). My new winding was three phase single layer concentric winding. Motor was made for voltage 380V, but now we have 400V in EU. pressure washing duluth ga. 7 months ago. I hope you enjoined my presentation of rewinding a three phase motor. Remove clamp, and safety ring if you have one. I couldn't access to them because other winding were too small. Thank you for your attention. However we use mostly in our homes and for small work the one phase motor, in this post you will learn about the, Single Phase Motor Wiring With Contactor Diagram. But in next measurement we can see that resistances do not dramatically affect on electric motors performance. 3 Phase, Wire system is not possible in Delta Connection. I see several videos of people in India doing it, so I guess at least there it's a business. O and X are showing direction of electric current. Cleaning and baking the … Because cage is short-circuited, voltage generates flow of electric current. Hi in step 18 you calculate the number of poles with the formula p = (60 x f)/ ns, you get 1 as the answer yet you state that you had two pole pairs? There are main two types of AC motors which are single phase and 3 phase. Dear soon I will publish a post about submersible pump starter.... Dear soon i will publish a post about the connection of starting and running capacitor. Sandblasting is process where sand hits surface of workpiece with very high speed and slightly damage it. It has very good efficiency and low manufacture and maintain costs. Then i decide to make bigger one but i found problem again. You cant pick up winding factor from table if you have one layer winding. Third time i successful rewind motor. Did you recieve pdf for single phase sir? Current which is flows inside picture has clockwise direction of magnetic field. Wire coils together according to winding diagram. On the motors inscription board we can find most useful information about motor: Before measuring remove all connections in conduction box. https://www.youtube.com/results?search_query=indians+rewind+motors The first I saw was this https://www.youtube.com/watch?v=bsS_7EEYx1Y. Second picture is showing the magnetic field generated by stators winding. It depends on number of pole pairs. All parameters are very close together. End of each coil wire to conduit box and extra isolate them. Then you can take it of winding tool. on Step 3, Could you please help me know meaning of those letters when connection is done, Question 8 months ago, it is taken from general formula i.e, 1/4.44 = 0.22, Question Rotation magnetic field "cut" squirrel-cage, where it induces voltage. Remove connections and conduit box from stator. There is a table in upper picture. It depends on type of isolation. Contents. I had metal ventilator so i heated it up. Thanks for the time commitment and also for a great intructable! Most time i spent on calculation of new winding. We tested next things: It took me about a week to rewind this motor. It seems like it wouldn't be worth it but I guess it must be at least marginally cheaper than building from scratch. I picked 0,8mm wire. I copied this picture from book [Neven Srb; Elektromotori]. We would like to show you a description here but the site won’t allow us. Attach new bearings. I draw new winding diagram which i had used at winding motor. ... LDC Series Lenier Service Motor Magnetic Plate (3 … The colour must withstand at least 100 degrees Celsius. Example: 4 pole motor has 90.6 % efficiency means that the motor is called eff2 motors. can you send it to me the the circuit diagram of magnetic contactor alonebecause I am confuse that where is it NC and NO is placed Because I am not Familliar on that contactor's brand, Sir i need ro float switch with conductor circuit, I am always searching online for storys that can accommodate me. Remove rotor from stator. Reply so the friend keeps watch and enjoy it.. 2.1 Motor Ohm Values Chart; 3 3 Phase Motor Winding; 4 3 Phase Motor … Because magnetic field must rotate faster than rotor to induce voltage in rotor. Go back to Contents Table ↑ 6. Cut it and twist it as I have done on gifs. For better presentation i made 3D model of my stators package. Try not to damage stators lamellas. Attach cover on stator. Gently hit cover and try to rotate it. A platform to learn electrical wiring, single phase, 3 phase wiring, controlling, HVAC, electrical installation, electrical diagrams, How is the connection made if their is starting and running capacitor available.in single phase submersible pump starter. You can use wooden stick to put winding in slots. However, some fantastic learning to be gained from this. Do you have a diagram for a single phase motor magnetic contactor with overload relay with no nc switch and red and green pilot light? Submerged Motor. Figure 11 – A delta-connected motor that failed because of a single-phase condition, Line 3 is open. Question You can se that on measurment of resistance where, winding resistances aren't identical. Number of pole pairs depends on nominal frequencies and rotation speed of magnetic field. In winding books there is a lot of different types of winding diagrams. 5 months ago It has 6 pole. If we compare all data we can see that motor isn't bad at all. Get info of suppliers, manufacturers, exporters, traders of Printing Machine … 2 years ago. Hello sir, can you make diagram about 54 slots? I made all tests with two different voltages. Please sir,single phase motor rewinding formula pdf send to gmail adress- pyithein654@gmail.comThank for knowledge sharing. 8 months ago. That's why we call them Three phase ASYNCHRONOUS electric motor. It should fit perfectly so you cant pull it out. 1 Motor Ohm Values Chart. Resistance between two winding and winding - frame should be more than 1,5 Mohm. Find here online price details of companies selling Printing Machine. IE2 motor can be claimed as IE3 motor by running the motor with variable frequency drives. Plot size 6359 sqmtrs, Built up Area :Acc 16200 and RCC 10000 sq ft. ... sectional warping machine 5400 mm width and rewinding creel 480 spindles is available for sale. Select appropriate value of induction in air gap from table. Screw motor together. Rewinding is very long process. 2. You must not leave too much space, because winding would be too bit, and you must not make it too small, because you will not be able access to all slots. In upper table there is data from manufacturer in first line. 9 months ago. After you wind coil you need to tie it up with piece of wire. Watch marks to put it into right place. If motor is older chose column I, else chose value from column II. By the winding head (Type of winding), number of wires in each gap and thickness of the wire you can rewind new motors winding without doing calculations in next step. Filling factor must be between upper and bottom recommended line. ; 2 it’s a very easy way here to Know The Motor Ohm Values Chart & set up the coil size of the motor. However we use mostly in our homes and for small work the one phase motor, in this post you will learn about the single phase motor wiring with contactor / motor … If you have other shape of slot you look at upper picture. Company owned Industrial Land and Building available for sale at 4th Phase Peenya, Bangalore. If would had 4 pole motor we would have 4 areas instead of 2 areas of magnetic field.