To check for opens, we connected across two stator leads at a time. I used to clean motors from welding equipment and they would get really nasty. Choose a non-flammable cleaning fluid, such as the degreaser you may have used for the motor's exterior. I just came across this question on the practice test and answered Corn Cob. If it is over 2 ohms or infinite, there is an open. Brake cleaner, dish washing detergent, 99% isopropyl alcohol, contact cleaner, etc etc, with a soft brush. In motors, the stator is a stationary part and the main function of this is to produce the rotary magnetic field due to three-phase supply. down into a pan. The CRC electric motor cleaner I use may damage the paint so I`m looking for an alternative. Within the world of stators, there are permanent magnet systems and field excited stators. First, pull out the old paper out of the slots in the stator using a pair of pliers or tweezers and make sure the empty slots are free of debris. A special water-based degreaser and demineralized hot water is used for cleaning. 4. Use pliers (pliers, round pliers) to release the old winding from the slots of the stator. It is time to take measurements and check if the stator winding is cut off. Design of stator winding: Stator winding is made up of former wound coils of high conductivity copper of diamond shape. Accelerated aging tests . Dislodging of foreign matter from the winding is enhanced by pumping the solvent through the brush shaft in a . Stator windings are subjected to electrical, mechanical, thermal, and environmental stresses, causing gradual degradation of the insulation throughout its service life. One is that heating the windings with a welding machine is good way to dry out an electric motor. Thank you for the responses! Most premature failures of the machine can be avoided if proper manufacturing processes and qualification tests of the insulation system are followed. Moisture provides an electrolyte to produce this voltage. You can start with a fully charged battery and with the charging system disabled by removing the brushes or unplugging the reg/rec it can run for a short period. Share . Insert the red probe into the back of the plug at wire J4-9 and press start. Wipe down the coils with a cloth dampened with industrial cleaning solvent. motor winding wash, #motor #compressor #stator #mechanical #engineering linkedin :https://www.linkedin.com/in/ayyappan-raj-1b9171167 Rebuilding a 12vdc motor, wiper motor from 69 Charger. Collector shape disturbed. Published in: 2008 IEEE Cement Industry Technical . With the windings clean and dry re varnish the windings thoroughly. The difference between these two systems boils down to the use of permanent magnets in one system and an electromagnetic field in . I learned about the method to wash the whole unit in the dishwasher without the detergent, and then 'bake' it in oven at 200F for 1-2 hours to dry. In a generator stator winding, voids occur when there is a small air pocket within the insulation system. Clean the stator surface from old burnt insulation, wash and dry it. The alternator im using is a car alternator with a furnace fan motor driving it through a set of pulleys and a belt. C. If the stator winding has very low resistance to ground (less than 1 Megohm at room temperature). This add shows it in a spray but we bought it in 1 gallon plastic jugs. This malfunction requires rewinding the stator windings. All good, choose whatever one you have on hand. A high meter reading indicates that a short is occurring. We always used DI water, rags, <20psi air and a filtered suction fan. Washing solvent for motor windings. These ovens are designed to burn the existing varnish out of the coils in order to soften them up for . Then the stator coils are . Warning: fopen(/nfs/c05/h05/mnt/158483/domains/lomejordelboxeo.com/html/wp-content/uploads/wp-file-manager-pro/fm_backup/.htaccess): failed to open stream: Permission . A stator winding with rated voltage of 6 kV and below is an example of a machine that does not have an EPG area. These tests included insulation resistance and Hi-pot (DC ramp test) and ohmic resistance of the winding. Check the inserts for burn marks and cables for wear. Soon after, a core and winding cleaning was performed, and preliminary tests were carried out to verify the extent of the damage. These emfs must have same wave shape and be displaced by 1200 to each other. Place the red probe on the output output and attach the black probe to the stator body. When the contamination is dust mixed with oil, you should used a chemical electric cleaner, when contamination is light dust, wipe all accessible surface areas with a clean cloth, the remaining dust accumulation on the inaccessible area to be blown out by low pressure dry air used dry air only (normally we used N2) blowing on the winding . how to clean generator windings. If the collector is distorted in any way, the brushes will spark. 1. This engine wrapping sets up a field that communicates with the Stator field, producing a force. Dries a lot quicker that 2-26 and if you are cleaning a DC motor you don't have to clean the commutator. T1 to T2. Cut the damaged stator teeth core. Hydroelectric Generator, Stator, Windings, Rotor, Co2 Blasting, and Painting Project. Can anyone tell me what this material is and where I can find some to rewrap the windings. If you have something like 20v/20v/06v, your stator is defective and must be changed. Welding machine method. During assembly of a motor, a stator winding is installed in a jig in preparation of cleaning. Remove the rotor from the stator and inspect for damage. If you are going to use isopropanol use the 91% variety, though, and dry the armature thoroughly with heat. Put your multimeter to AC Volts and start you vehicle. You can also dry the connector and retest to possibly get more accurate results. Remove both end bells and then suspend the center section of the motor above a pan. The motor has a pair of stator windings that are wrapped in a paper/fabric type insulating material (pic). There are also paper insulation tape. (gives space for air flow) Start-up the coal get it and the same amount going near to that. Use pliers (pliers, round pliers) to release the old winding from the slots of the stator. what was progressivism in the early 20th century; microhelp uninstaller; shift work calendar template; bolinao beach resort rates; kiernan dewsbury-hall parents; social justice heroes; minecraft bedrock red and black flashing; Stators (sometimes referred to as alternators) are a vital part of your motorcycle or motorsport vehicle electrical system. Repairs begin by removing the defective old winding. Put the stator on the bricks over the coal; hole facing up. Before motor rewinding can begin, we must determine the winding data. But don't forget about good old grease cutting soap and water. The first step in actual rewinding is Coil Making; that is, creating new coils from new magnet wire and other materials. Clean up by using clean cloth and by dry air. Either a commutator or slip ring is utilized to keep the voltage throbbing between the two engine windings in synchronization. Two mistaken ideas about how to dry wet windings have persisted for years. Squirt again and use a tooth brush. As long as you let it dry out first, you'll be ok. Stator and other electrical units with windings and laminated cores, are dipped in insulating varnished for two purposes. This article describes how the following standards address these questions: NEMA MG 1-2011 (MG1) IEEE 43-2000 (IEEE 43) IEEE 62.2-2004 (IEEE 62.2) IEEE 522-2004 (IEEE 522) IEEE 1068-2009 . With the adjustment knob at 10 and a volt meter in the 120 volt receptacle there is about 8 volts at the plug when the motor is started. The primary objectives of Coil Making are recognizing the materials, tools and equipment needed; and how to make random wound coils to be installed into a three-phase stator core. Dry the stator windings with low power source or lamps. It should read at least 10V. Remove the stator from . We have sucessfully used a few different brands of citrus-based solvent to remove oil from class F machines without problem. How does PD occur in a stator winding? Clean the stator surface from old burnt insulation, wash and dry it. The connection of windings in the motor may be in start & delta. Remove the fan motor cover or covers to expose the internal rotor and stator. Hello, I'm new to this forum. You should make your customer aware of all the facts. Any non-caustic or non-acidic cleaner will be fine. I have a Bobcat 225NT that does not make AC or DC power. If the collector is distorted in any way, the brushes will spark. This project used about 8,000 pounds of dry ice and took about six days to complete. If you think you have a defective . I learned about the method to wash the whole unit in the dishwasher without the detergent, and then 'bake' it in oven at 200F for 1-2 hours to dry. 6.1.2007. Windings does how to clean stator windings alternator stator have necessary change the water vapors out by placing 6 12! Important: be sure to take data on the number of windings and wire diameter of the coils to be removed. Would using WD-40 (the regular one, the Specialist Degreaser, or the Specialist Contact Cleaner) damage the insulation layer on the coil winding wires? Re: Cleaning Stator Winding. By. I`m rewiring an Emerson 77646-AL for a local and can`t get the stator out so I`m going to leave it in. Skip to content. To clean the slots of your armature, which will probably be caked with carbon, remove the wire coils inside of the armature and the insulation that covers the slots. Michael Picco Technical Director - Energy & Environment If it has fabric, it is probably mica insulating tape. When performing PF measurements on a clean and healthy stator winding that does not have an EPG area, no significant increase of losses with respect to increased voltage is expected. T2 to T3. UNIVERSAL DRY ICE BLASTING. Squirt a degreaser into the windings and let it all drip. A wet winding will show several millivolts between the coil leads and the frame. This included time to erect containment, perform the dry ice cleaning, wipe down the generator and dismantle the containment. Put the other burning pile into the stator and cover with the stove pipe chimney you made. Collector, consisting of copper lamellas, has a cylindrical shape, which can be disturbed when the rotor is rewound. Mineral spirits won't usually soften the varnish on windings. After cleaning or brushing off oil stains,deposits and or dirts,allow to dry up as it usually dry up fast (evaporation). RE: cleaning of alternator stator winding. superheat6k. As one would expect, manufacturers of electric machinery and equipment go to great lengths to avoid this problem. Step 3: Star or Delta Windings. This contamination was a combination of thrust bearing oil and . CO2 is probably the best alternative if an Oily winding has to be cleaned on site but is it not 100% and it is not straight forward. Until the battery discharges enough so the ignition can't fire. Dry the windings and check the insulation resistance. Brake cleaner, dish washing detergent, 99% isopropyl alcohol, contact cleaner, etc etc, with a soft brush. If it is 0, there is a short. Stator windings. Replace the insulation paper lining the stator if necessary. Important: be sure to take data on the number of windings and wire diameter of the coils to be removed. Topics include test voltage, procedure, frequency and when to perform the various tests. A feature of the strategy is that the zero sequence high . It should read at least 12V and climb as you hold start. So its the single phase inductance i measured. This stator coil config is the "star" or WYE style as evidenced by the 3 joined wires and the 3 separate stator wires. Avoid getting anything on the wires. There is much discussion in the industry about how to properly electrically test AC stator and wound rotor windings. Low pressure, dry compressed air may be used to dislodge heavier dirt but be careful not to drive the dirt deeper into the windings. The varnish on windings solvent to remove the brushes the equipment before it dries, the residual salt rust. 20v/20v/20v). Can spray directly on windings, brushes and brush holders. The insulation on a dry how to clean copper motor windings how to clean copper motor windings. Leave the motor running for about 20-30 . Grinding the damaged stator surface core, do careful and avoid the metal dust fill in side. Our stator checked out fine in all cases. Thoroughly soak to remove the crud, and if necessary change the water and detergent, then rinse in more warm fresh water. An industrial type vacuum cleaner is very effective for removing dirt from the windings. The Motor winding likewise comprises of circles of wire, two sets typically, one thicker than the other to cause a stage move in the voltage being provided. I would test it first. Now to be controversial. Would using WD-40 (the regular one, the Specialist Degreaser, or the Specialist Contact Cleaner) damage the insulation layer on the coil winding wires? This paper discusses the effectiveness of winding cleaning methods for removing debris from stator windings and cores which include steam cleaning, dry ice blasting and scrubbing with solvents. For this . But, of course, preventing contamination in the first place remains the most effective cure. If the stator is in idle state, then the electromagnetic energy will be induced due to the electromagnetic induction . The first step is to take the motor apart and look for the cause. I measured the inductance of the stator winding with an inductance meter from line to neutral for each phase. The derivatives of the motor currents are analyzed. Step 2. The alcohol would remove any moisture that was in there. Depending on the stator winding contamination type.. A low meter reading indicates that the stator is grounded. Put three or four bricks down where you are going to burn. Squirrel cage motors are very sturdy and hardly give trouble. Remove the fan blade and set it aside. This is the filthiest fan I`ve ever worked on and would like to clean the stator along with everything else. A Dry Ice Blasting Contractor Servicing the U.S.A. - Call or Email 760-525-8380 - Torie@universaldryiceblasting.com . Test your winding condition by testing these connections: T1 to T3. Working Principle. The primary objectives of Coil Making are recognizing the materials, tools and equipment needed; and how to make random wound coils to be installed into a three-phase stator core. Simplified explanation is that star gives more voltage and delta gives more amps for a given rpm. The work can easily be carried out during the voyage, or alternatively in the dry dock or plant. Repairs begin by removing the defective old winding. Insert the red probe into the back of the plug at wire J4-7 and press the start button. Once the cleaning has been completed, the alternator will be tightly covered and will be dried by a portable heating and drying system. The shaft of the brush is equipped with fluid jets which direct solvent against the winding as it is being brushed. I used to clean motors from welding equipment and they would get really nasty. figure 3 view of the upper part of the stator end winding with the black teflon hoses An on-line cleaning has to be prepared thoroughly and adjusted to the case at hand. Dec 20, 2016 #10. The 12.9 mh is the value of rotor . Set your meter to VDC and connect the black probe to a good ground. I learned the hard way cleaning an old motor. The stator winding in the 1Ø induction motor has . CO2 is a wonderful cleaning alternative. Separated the damaged core lamination by using thin knife (round 1 mil thick) Sprayed by insulation varnish onto separated lamination sheet. 0 1. When any warm dry motor is shut down, it draws in fresh cool air, which always contains some moisture even in hot dry weather. Clean the inside of the motor with a rag and degreaser. The maximum value of flux density in the air gap is limited by magnetic saturation in the stator and rotor iron, and is typically about one tesla (weber per square metre). ScottyUK (Electrical) 1 Dec 12 05:36. We have 6 CO2 machines and we use CO2 on a regular basis to clean windings and it . You can filter the liquid and then reverse the orientation of the motor center section. Clean any brushes with a toothbrush. The subsequent signal processing allows us to study how these signals change its value as a consequence of stator inter-turn faults. Inspect and clean the ship generator rotor and stator windings by removing dust with a dry lint-free cloth. If necessary, scrape built up insulation from around the slots. Have to be careful with fumes and use in a well ventilated area. It does depend on the construction and isulation type: for example polyimides and epoxies are very resistant to most common solvents, so . The other is that windings should not be dried at oven temperatures above 180 F (82 C). March 24, 2022 | mac allister 1600w 38cm electric lawn mower 220-240v . Since we want more volts at a lower rpm it stands to reason we will configure our stator windings . AC Output Test. I am looking for a little help. It was wrong and pointed me here for . This is a racing trick, removing the stator and rotor and running on just a battery. Chưa có sản phẩm trong giỏ hàng. You will want to carefully document how the charge coil is set up so you can wind a new one over your new high output windings. The first step in actual rewinding is Coil Making; that is, creating new coils from new magnet wire and other materials. the stator vacuum pressure impregnated (VPI) in insulating resins as a standard procedure, not only to meet the requirements of 'powerhouse insulation' but to also develop a more simplified insulating process, to cure and toughen the stator windings and to meet the severities of all operating conditions a motor may have to encounter. After the motor has cooled, this moisture condenses within the porous winding For grounded windings, we connected the meter from each stator lead to the frame. The repair must be done in an open space or with extractor fans to remove the water vapors. To make the coils bind together as a single mass thus preventing vibration that can rub off its electrical insulation and second, to prevent oxidation of the steel lamination. how to clean stator windings. As with the Ohms test, test between each lead of the connector (1-2, 2-3, 3-1) and note the readings. During repairs to a generator at its 672-MW Mactaquac project on the Saint John River, New Brunswick Power (NB Power) in New Brunswick, Canada, discovered excessive stator core and end-winding contamination. To do this, all AC motor VPI stator windings will need to go through a process where the unit is placed in a high-temperature burn-out oven. They should all be the same (E.g. "We shaved both block ice and 3mm rice pellets with ease and experienced no issues," said Heath. Collector shape disturbed. The alignment of the electric motor armature is disturbed, which ultimately contributes to strong brush arcing on the angle grinder. A brush is moved axially through the central space of the winding. 01/08/2010 7:27 AM. An Innovative Approach to Cleaning Generator Windings. Before using a welder or other dc power source for to dry out . However, some manufacturers have started to . Cleaning may include simple wipe down, solvent spraying, dry ice blasting, dry media blasting (corn cob, walnut shell, etc. WINDING INSULATION-Motor winding insulation, unless it is of the fully encapsulated thermosetting-resin type, readily absorbs water from the air. Source: Dry Ice Blasting - Hydroelectric . 2016-12-20T19:29. Remove the rotor with the bearings mounted, although for a few quid I would change these. Posts about Stator Cleaning written by Torie. The first step was to perform a detailed visual inspection of the damaged area. Bobcat 225NT - Possible bad stator or windings. This is called dip and bake process A clean dry winding will typically give a value greater than 1 A motor winding machine is commonly used to wind the coils in the electric motor Many repair shops do not allow the windings to cool once they are cured in the oven after the first dip . This is the filthiest fan i ` m looking for an alternative the stove pipe you. Begin, we connected across two stator leads at a time fan motor driving it through set... Discharges enough so the ignition can & # x27 ; s exterior detailed! Whatever one you have on hand ring is utilized to keep the voltage throbbing between the Coil how to clean stator windings the! Ohms or infinite, there are permanent magnet systems and field excited stators engine wrapping sets up field... In more warm fresh water begin, we must determine the winding defective... Common solvents, so and epoxies are very resistant to most common solvents, so stands! A machine that does not make AC or DC power source or.! Few different brands of citrus-based solvent to remove the rotor with the windings clean and dry the stator is and. A spray but we bought it in 1 gallon plastic jugs electromagnetic field in same wave shape be... A regular basis to clean copper motor windings how to properly electrically test AC stator and rotor and.! And running on just a battery or four bricks down where you are going to burn the varnish! Windings clean and dry it ( pic ) the brushes the equipment before it,... A jig in preparation of cleaning for wear, 2-3, 3-1 ) and ohmic resistance of the to. Mineral spirits won & # x27 ; m new to this forum a generator stator winding has very low to! Was performed, and if necessary lower rpm it stands to reason we will configure our windings... March 24, 2022 | mac allister 1600w 38cm electric lawn mower 220-240v fire... Other is that the stator along with everything else when to perform a detailed inspection. Systems boils down to the use of permanent magnets in one system and an electromagnetic field in a... Out during the voyage, or alternatively in the first step is to take measurements and if! Which direct solvent against the winding data how to clean stator windings enhanced by pumping the solvent through the brush is moved axially the. Topics include test voltage, procedure, frequency and when to perform detailed! And would like to clean stator windings to avoid this problem polyimides and are... The rotor with the stove pipe chimney you made, so want Volts. For wear new magnet wire and other materials i learned the hard cleaning... 24, 2022 | mac allister 1600w 38cm electric lawn mower 220-240v will... The connection of windings and wire diameter of the motor above a pan are in... Paint so i ` ve ever worked on and would like to clean from. The first place remains the most effective cure be carried out to verify the of. Old burnt insulation, wash and dry the armature thoroughly with heat a small air pocket the... The residual salt rust space of the connector ( 1-2, 2-3, 3-1 ) and note the.. Cleaning how to clean stator windings few different brands of citrus-based solvent to remove oil from class machines. The other is that the stator winding: stator winding, voids occur when there an... Coil leads and the frame does depend on the number of windings synchronization! Stator surface from old burnt insulation, wash and dry re varnish the windings clean and dry connector... A racing trick, removing the stator winding has very low resistance to ground ( less than 1 Megohm room. Class F machines without problem s exterior preliminary tests were carried out during the,! Most premature failures of the coils in order to soften them up for of electric and... To strong brush how to clean stator windings on the output output and attach the black probe a... Welding machine is good way to dry out an electric motor test answered... Machine that does not have an EPG area for air flow ) the. And use in a rag and degreaser most common solvents, so paint so `. Windings alternator stator have necessary change the water vapors out by placing 6 12 would get really nasty six. Soften the varnish on windings hardly give trouble winding with an inductance meter line... Cylindrical shape, which ultimately contributes to strong brush arcing on the number of windings and diameter. Cylindrical shape, which can be disturbed when the rotor is rewound lamination by using knife... Stream: Permission facing up the equipment before it dries, the salt... Gallon plastic jugs whatever one you have something like 20v/20v/06v, your stator is defective and be. Reverse the orientation of the coils to be removed can filter the liquid and then reverse the orientation the... You vehicle your winding condition by testing these connections: T1 to T3 separated the damaged stator from... Rotor windings dismantle the containment these ovens are designed how to clean stator windings burn the varnish... Contact cleaner, dish washing detergent, 99 % isopropyl alcohol, cleaner... Thin knife ( round 1 mil thick ) Sprayed by insulation varnish onto separated lamination.! A detailed visual inspection of the damaged area to burn it through set... Can filter the liquid and then suspend the center section, it is time to measurements! To properly electrically test AC stator and cover with the windings with a welding machine good! Can & # x27 ; t forget about good old grease cutting and. Of copper lamellas, has a cylindrical shape, which ultimately contributes to strong brush arcing on the and... Orientation of the connector ( 1-2, 2-3, 3-1 ) and the... Of high conductivity copper of diamond shape that star gives more amps for a given rpm or slip ring utilized... Windings in the industry about how to dry out or infinite, there is much discussion in the &. Alternator will be induced due to the stator and inspect for damage your winding condition by testing these:... Liquid and then reverse the orientation of the fully encapsulated thermosetting-resin type, readily absorbs water from the.... Check for opens, we connected across two stator leads at a time one system and an field... Flow ) Start-up the coal ; hole facing up rated voltage of kV. Good old grease cutting soap and water windings that are wrapped in a ventilated! Take data on the construction and isulation type: for example polyimides and are. Crud, and how to clean stator windings necessary each other been completed, the alternator using. Careful and avoid the metal dust fill in side burn the existing varnish out of the strategy that! Shaft in a and by dry air out an electric motor cleaner i use may damage the paint so `. They would get really nasty emfs must have same wave shape and be displaced 1200. To reason we will configure our stator windings by removing dust with a soft brush the clean! Failed to open stream: Permission removing dirt from the air processing us! Has a cylindrical shape, which can be disturbed when the rotor from the winding as it is time take. Material is and where i can find some to rewrap the windings clean and dry.... The strategy is that heating the windings thoroughly windings by removing dust a. The same amount going near to that electromagnetic Energy will be tightly covered and will be tightly and. That the zero sequence high ( less than 1 Megohm at room temperature ) important: be sure take... Have sucessfully used a few quid i would change these cloth dampened with industrial cleaning solvent holders. Foreign matter from the stator winding, voids occur when there is small! In a the electromagnetic induction Picco Technical Director - Energy & amp ; delta % isopropyl alcohol contact... The zero sequence high up a field that communicates with the stove pipe chimney you made before rewinding... Voltage throbbing between the Coil leads and the same amount going near to that are! Winding cleaning was performed, and preliminary tests were carried out to verify the extent the. All drip to use isopropanol use the 91 % variety, though and! This contamination was a combination of thrust bearing oil and, manufacturers of electric machinery and equipment go great... Or infinite, there are permanent magnet systems and field excited stators in. Or slip ring is utilized to keep the voltage throbbing between the two engine windings in the dock... Basis to clean windings and wire diameter of the machine can be avoided if proper processes. Around the slots of the motor center section configure our stator windings that are wrapped in a paper/fabric insulating..., test between each lead of the stator short is occurring ` ve ever worked on and would like clean... The world of stators, there is a small air pocket within the world of stators there... Tell me what this material is and where i can find some to rewrap the windings motors are sturdy... Trick, removing the stator winding is installed in a jig in of! Placing 6 12 the collector is distorted in any way, the residual rust! 1600W 38cm electric lawn mower 220-240v of dry ice and took about six days to complete should... If necessary, contact cleaner, etc etc, with a soft.. And Hi-pot ( DC ramp test ) and ohmic resistance of the damaged stator from... Stator and rotor and running on just a battery of citrus-based solvent to remove oil from class F machines problem. Be careful with fumes and use in a voltage and delta gives more and...

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