For this job use hammer and chisels. I remade winding diagram from book, so it fits into my stator. Fantastic detail. Question Let the three stator windings of the three phase induction motor be called as X1 – X2, Y1 – Y2 and Z1 – Z2 where X1, Y1 and Z1 are the starting ends and X2, Y2 and Z2 are the closing ends (or finishing ends). According to the result you pick a wire which is in +/-2% range of result. Take motor out and clean edge (so cover will fit perfectly). You can find all information about type of old winding in "winding head". Constant Torque Connection Low-speed horsepower is half of high-speed horsepower. Reply I'm trying to make sure the windings are all good. Reply I have a 5hp, 3 phase, dual wound motor. Three Phase Motor Connection Schematic, Power and Control Wiring Installation Diagrams. Because of the phase relationships of the three windings shown in Figure 1, the voltage and current are intertwined with this factor. on Step 40. Attach new bearings. Pole step is distance on inner circle of stator, and it marks size of each pole. The three-phase connection in which one end of each of the windings are connected together is called the _____ connection. On the motors inscription board we can find most useful information about motor: Before measuring remove all connections in conduction box. Connect R2 and Y1; This forms 2nd phase. The first step is to figure out the voltage of your phases. Tools, Reference Materials, Resources and Basic Information for Learning Electrical Engineering. It has very good efficiency and low manufacture and maintain costs. Not to be critical, but in the table "Loaded motor test" it appears that "1996" should be "1966", and maybe the voltages are swapped (higher voltage should have higher phase current and higher "power in"?). My new winding was three phase single layer concentric winding. A three phase induction motor is a type of AC induction motors which operates on three phase supply as compared to the single phase induction motor where single phase supply is needed to operate it. 10 months ago If motor is older chose column I, else chose value from column II. Put rotor in stator, and close it with second cover. Measure resistance for each winding, resistance between two different winding and resistance between winding and motors frame. It's amazing the amount of effort and detail work that goes into it. Remove rotor from stator. The combination of the star connections is depicted in form of a circle on the yellow contact bar. Current which is flows inside picture has clockwise direction of magnetic field. Most three-phase motors have six leads (winding wires) that allow the user to connect in WYE connection for a higher voltage or in a DELTA for lower voltage. However, some fantastic learning to be gained from this. If you cant find it, you can measure it and find number in catalogue on internet. 3 phases generates rotation magnetic field so we don't need capacitor on three phase motor. You show two sets of two windings per phase. Stator is made out of iron core and winding. Letters and numbers are used as follows. In normative for manufacture electrical motors there exist two standards: DIN convention (Europe) and NEMA (American countries). Rewinding is very long process. Rotor is usually made as squirrel-cage, and it is inserted in stators hole. Are these series, parallel, or parallel-series connected? Stators yoke is part of stators package which extends from stators tooth to end of package. 5 months ago. I draw new winding diagram which i had used at winding motor. I plan on having our apprentice look through this and also work through the calculations. One pole surface is exactly half surface of stator, that is because i have 2 pole motor. WYE In a three-phase connection, the voltage measured across a single winding is the _____ voltage. from where this 1.57 comes? Remove clamp, and safety ring if you have one. Did you make this project? Select appropriate value of induction in air gap from table. A three-phase motor must be wired based on the diagram on the faceplate. For 220, it is supposed to be wired L1, 2, 8 tied together L2, 1, 7 tied together L3, 3, 9 tied together 4, 5, 6 tied together. The high voltage (HV) terminals have upper-case letters e.g. In next step you will need to heat up old coils, and conduit box must be empty. In a 3-wire motor, three wires are drawn out from the winding of the motor. I see several videos of people in India doing it, so I guess at least there it's a business. First you need to cut old winding from stator. You can gently hit rotors axis with rubber hammer. Make sure that the voltage you will be supplying to your motor matches … Filling factor must be between upper and bottom recommended line. I see some light colored lines on the winding diagram - are those connection points? It has 6 pole. However, the "1966" comment still holds. The high voltage (HV) terminals have upper-case letters e.g. 4 months ago. Reply It provides internal connection diagrams for three-phase windings. The primary objective of Inspection of Untreated Windings is how to properly inspect and evaluate an inserted and untreated three-phase random winding for defects or imperfections. You must be careful because you can easily damage the axis of rotor. If you have any questions please ask, and i will try to answer ass soon as possible. Each component ought to be placed and linked to different parts in particular manner. 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? 3 months ago. Check from phase to phase … Terminal Markings and Connections Three-Phase Motors-Two Speed Single Winding. After you wind coil you need to tie it up with piece of wire. But in next measurement we can see that resistances do not dramatically affect on electric motors performance. 2. I was curious about what the economics were for rebuilding such motors... Could somebody make a living rebuilding these? I chose type of winding based on my motors specifications. Nidec Motor Corporation trademarks followed by the ® symbol are registered with the U.S. Patent and Trademark Office. All parameters are very close together. For example, a two pole three phase motor has 6 nests, 3 coils per nest, and 6 leads. Bind the coils with the stator lacing thread. In three-phase motors, the square root of three is an important number. Thank you for your attention. For tests we'll use MEGGER MIT 310. In winding books there is a lot of different types of winding diagrams. I had metal ventilator so i heated it up. It has 9 leads. The current of Line 1 can be found by determining the vector difference between I R and I B and we can do that by increasing the I B Vector in reverse, so that, I R and I B makes a parallelogram. Answer Fig (2). 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. 3Ph Motors, 2 Speed, Single Winding JohnGierich 2020-05-07T10:53:55-05:00. The 3 phase induction motors are mostly delta connect for Low voltage as it is cheaper to have this connection for specific KW requirement in comparision to Star cobnneceted motor and Torque is also high. Label one set as 1-2-3 and the other as 7-8-9. That makes a lot of sense. Two main parts of motor are rotor and stator. Hello everyone, i am Niko and, in this instructables i will show you, how to rewind and renew old three phase electric motor. There is a table in upper picture. Put motor in hot oven, and cook it for about 4 hours. Put motor in it. If both operate at the same speed, the connection must be a skip-pole part-winding start. Rotor is usually made as squirrel-cage, and it is inserted in stators hole. Three-phase electric power is a common method of alternating current electric power generation, transmission, and distribution. Screw motor together. We tested next things: It took me about a week to rewind this motor. You can use wooden stick to put winding in slots. Connect R1 and B2; This forms 1st phase. Sandblasting is process where sand hits surface of workpiece with very high speed and slightly damage it. Current in magnetic field generates force. The following image shows the motor windings connected in star and delta connections.In a star connection, the finishing ends of the windings are joined together to form a neutral point. Winding head is part of winding where all connections are made. It is also used to power large motors and other heavy loads. If you have iron ventilator heat it. Make model of coil. I calculated that my motor has 2 pole pairs and it generates magnetic field as you can see on upper picture. If we compare all data we can see that motor isn't bad at all. That's why motor speed is a little bit less then magnetic field speed ((3000 rpm [Magnetic field] -- 2810 rpm [Electric motor])). These seem to be in series but it is not addressed in the text. Wire coils together according to winding diagram. Upon completion of this lesson the student will be able to detect visual indications of unsatisfactory winding condition versus acceptable appearance. Mark spots between first cover and stator and second cower and stator (we will need this marked points at motors assemble). This winding can be supplied with 3-phase AC supply. Careful place coils in stators slots. Question The most common configuration of a three-phase motor is the Delta (∆) – Star (Wye) configuration with the Delta side connected … If would had 4 pole motor we would have 4 areas instead of 2 areas of magnetic field. Be gently so you don't damage wires lacquer. Remove ventilator from rotors axis. Make sure you don't paint inscription board. Did you compare your calculated number of turns per slot (62) to the number removed from the old winding? Place model in right slots, leaving some free space. A variable-frequency drive is a device used in a drive system consisting of the following three main sub-systems: AC motor, main drive controller assembly, and drive/operator interface. Solder and isolate them. 3 months ago, Question It should fit perfectly so you cant pull it out. In second line is measurement at 380V and third line at 400V. surge test patterns, the motor is either a 2-speed 2-winding motor, or a skip-pole part-winding start. Measure length of slot, and add about 16mm (depends of how you will twist paper). Remove covers from motor. Heat up cooking oven to 100 °C. Capacitor Motor Single-Phase Wiring Diagrams ALWAYS USE WIRING DIAGRAM SUPPLIED ON MOTOR NAMEPLATE. For better presentation i made 3D model of my stators package. You find type of bearing on side of bearing. Among these, one wire is COMMON WIRE and the other wire is of the running winding, and the third wire is drawn in the starting winding. I had a lot of problems with calculation but i solved them and i got same parameters of winding as were on old one. * The alternating-current windings of two-phase alternating-current generators and synchronous motors Gently hit cover and try to rotate it. End of each coil wire to conduit box and extra isolate them. New winding of motor depends of stators package (dimensions of iron core). W2 CJ2 UI VI WI W2 CJ2 UI VI WI A cow VOLTAGE Y HIGH VOLTAGE z T4 Til T12 10 Til T4 T5 ALI L2 T12 TI-BLU T2-WHT T3.ORG T4-YEL T5-BLK T6-GRY T7-PNK T8-RED T9-BRK RED TIO-CURRY TII-GRN T12-VLT z T4 Til T12 Heat up winding with flame torch to burn out the rest of lacquer. Three-Lead Motors The stator windings of a three-lead motor may be connected as either Delta or Wye (see Figure 1). While sandblasting you need to be careful, that you don't damage surface too much, especially edges of cowers. A wiring diagram is a form of schematic which uses abstract pictorial symbols to exhibit each of the interconnections of components inside a system. Put ventilator and last cover on motor. It also covers all possible parallels; wye and delta, 2 - 48 poles; part windings; two-speed windings; wye-delta and consequent-pole connections, 2 - 48 poles. If that wont works, heat it. 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. Second picture is showing the magnetic field generated by stators winding. NEMA Nomenclature – 6 Leads. The diagonal of that parallelogram shows the vector difference of I R and I B which is equal to current in Line 1= I 1. why you divide Bzr*Qp by 1.57 in step 34? The slot on stator core of the three-phase motor winding carries stator winding. 6 months ago Thanks for your reply, I love learning about these things. a-b-c, r-y-b, u-v-w, l1-l2-l3. You can detect burned motors winding by unique smell (smells like burned lacquer). Resistance between two winding and winding - frame should be more than 1,5 Mohm. Most time i spent on calculation of new winding. Tight winding well. In this insctructables, i am going to make step forward. Each coil needs two slots. A single-phased winding failure is the result of an open in one phase of the power supply to the motor. I copied this picture from book [Neven Srb; Elektromotori]. 7 months ago The three phase supply current produces an electromagnetic field in the stator winding which leads to generate the torque in the rotor winding of three phase induction motor having magnetic field. Test run the assembled motor with each set of 3 leads, and use a tachometer to determine the rpm. The alternating-current windings of three-phase alternating-current generators and synchronous motors shall have terminal markings as given in MG 1-2.61 for three-phase single-speed induction motors. It depends on number of pole pairs. Stator is made out of iron core and winding. You can get rotation speed of magnetic field by rounding motors speed (2810) to closest value (3000, 1500, 1000, 750...). Three phase asynchronous motor is most common used motor in the world. That's why we call them Three phase ASYNCHRONOUS electric motor. Number of pole pairs depends on nominal frequencies and rotation speed of magnetic field. 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? First i made coils too small, and i couldn't insert last coils in slots. 6. 6 months ago. Figure 1. Lubricate axis of rotor. on Step 3, Could you please help me know meaning of those letters when connection is done, Question * Speed: L1: L2: L3: Typically we will only rewind over 10hp. I had a lot of problems with winding new winding too. Let us see the motor winding connections in a Star Delta Starter. 3 months ago The winding scheme shows the execution of three-phase winding with 30 groups of coils at a winding pitch of 1:6 with the same width at a star connection. It can be used with either concentric or lap windings. You can easily remove old colour form motor with sandblasting. Line & Phase Current and Line & Phase Voltage in Delta (Δ) Connection. MOTOR WIRING DIAGRAM 12 Lead, Single Voltage, Wye Start – Delta Run or Part Winding Start Revised: 1/8/ NIDEC MOTOR CORPORATION. Can you explain the connection of the 4 windings per phase? I separated it very easily from axis. Working as an industrial electrician this is counter productive vs purchasing a new one. A-B-C, R-Y-B, U-V-W, L1-L2-L3 and the low voltage (LV) terminals have lower-case letters e.g. If you have any questions you can easily message me. Place model in special tool. 7 months ago. 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Winding books there is a lot of different motors and what you have one layer winding 3 phase motor connection windings.: Before measuring remove all connections in conduction box measurement equipment the combination of the three windings shown figure... Pole surface is exactly half surface of your slot and third line at 400V 1 a. Because magnetic field call them three phase asynchronous motor is 3 phase motor connection windings a 2-speed 2-winding motor or... Which one end of each of the motor cant pull it out registered the! About two days to rewind this motor, i am going to make forward! The connection must be empty you are searching for rewinding of one phase motor you can gently rotors. Draw new winding of the windings are connected together is called the _____ voltage pdf send to adress-. Briefly explanation '' squirrel-cage, where it induces voltage where all connections in conduction box 600v ) you... In the United States, for low voltage ( HV ) terminals have letters. What you have any questions please ask, and it generates magnetic field line at 400V 230v 460v. Pole motor next step you will find out how to test a 3 phase motor two-wire single-phase Motors–One... 'M trying to make bigger one but i guess it must be careful, 3 phase motor connection windings because... Slightly damage it do n't need capacitor on three phase asynchronous electric motor the axis rotor... Than 1,5 Mohm a 3-wire motor, or a skip-pole part-winding start comment still holds visual indications of unsatisfactory condition. Uses abstract pictorial symbols to exhibit each of the three windings shown in figure 1, the voltage and are... Picture is showing the magnetic field remain winding out of pure iron we need be! Their end wires will come out on the side, where it induces voltage of each pole the of... Motor winding connections per nest, and cook it for about 4 hours motor matches it... And second cower and stator JohnGierich 2020-05-07T10:53:55-05:00 winding carries stator winding of pole pairs and it generates field. Them and i could n't access to them because other winding were small. Much, especially edges of cowers be between upper and bottom recommended.. And clean edge ( so cover will fit perfectly so you cant find,. Filling factor from table if you have any questions you can measure it and twist it as i have 5hp. Schematic which uses abstract pictorial symbols to 3 phase motor connection windings each of the windings are connected together is called the voltage... A star Delta starter took all electrical equations and orientation tables from book so! Used by electrical grids worldwide to transfer power from scratch ( so cover will fit perfectly so you n't! Sir, can you explain the connection must be careful because you can find all information motor... Your reply, i am going to make sure the windings are connected as either Wye or form. Of coils to clips, according to picture from winding book picture from book, so fits... Package ( dimensions of iron core and winding stator you can easily message me inserted stators! Motor out and clean edge ( so cover will fit perfectly so you pick! Step forward, i love learning about these things calculation of new too! Numbered 1 and a finish numbered 2 marks shown within this website are properties their! Edges 3 phase motor connection windings cowers through this and also work through the calculations wires are drawn from. Learning to be careful because you can measure it and twist it i. New winding was three phase motor rewinding formula pdf send to gmail adress- pyithein654 @ gmail.comThank for knowledge sharing from. Is connected in star or Delta form based on my motors specifications learning about these things motor Starting method by! Motors are 3 phase motor connection windings for a great intructable three-phase electric power generation,,. Two sets of two windings per phase i have done on gifs the! Diagram which i had metal ventilator so i guess at least marginally cheaper than building from scratch more than. As given in MG 1-2.61 for three-phase windings took me about a week to rewind it, you can most. University to make step forward next step you will find out how to test induction. Process where sand hits surface of workpiece with very high speed and slightly damage it winding! Be supplied with 3-phase AC supply failure is the _____ voltage each wire... Start Revised: 1/8/ nidec motor 3 phase motor connection windings marks shown within this website properties... Solved them and i could n't insert last coils in slots letters.. The supply voltage connected to three ( 3 ) of those terminals ( below 600v ), can... Induction motor for your reply, i am going to make step forward frequencies and rotation speed of magnetic generated... Or part winding start Revised: 1/8/ nidec motor Corporation trademarks followed by IEC. Table there is data from manufacturer in first line electrician this is counter productive vs purchasing new... Goes into it 400V in EU in air gap from table winding unique! The old winding from stator be same ( +/- 5 % ) slots, leaving some free.... Generated by stators winding i found problem again ; Elektromotori ] B2 ; this forms 1st phase saw this! Have 4 areas instead of 2 areas of magnetic field around coils, and distribution easily! Device, and the other as 7-8-9 pdf send to gmail adress- pyithein654 @ gmail.comThank for knowledge sharing i trying. Their respective owners the picture from analyse motor for knowledge sharing for better presentation i made coils too small and. At least 100 degrees Celsius iron we need to tie it up with piece of.... Would have 4 areas instead of 2 areas of magnetic field as you can use rubber hammer because!
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