High voltage motor repair

Winding

High-voltage motor according to the voltage level of the need to use bis (imino), mono (imino), thin double wire, such as a variety of silk bag flat wire, materials, complete, in winding machine winding made the shuttle into a circle, General Motors short loops straight part of 25 cm, maximum coil linear part of 1.2 meters, the winding can be single flat winding, single vertical winding and double flat transposition around, can also be flat double transposition vertical winding and determined according to the specific requirements. Use disk in universal adjustment can also be wound roundthe enameled wire coil. Winding machine line built a motor and a turbine rod speed reducer, drive winding machine to achieve 0-120 RPM of clockwise and counter rotation of the brake, and positive and negative counts, generally around the various coil motor of 1600kw within, another with a simple up a tensioner, can control winding of coil tightness, general repair manufacturers choose to use the above products can be encountered, such as the large special specifications, can choose specific type winding equipment.

Before forming dressing

High voltage motor spindle type coil after winding, with contraction band, yellow wax ribbon insulation materials such as dressing. The aim is to protect the coil insulation, interlayer insulation and inter turn insulation for damage. From the mold fixture, nose pin friction in pull type machine, to prevent loosening deformation.

Women generally use coil dressing, and work fast women talk handy because, generally 3-5dressing for pull type. Can also be used with electric machine package.

Forming

Molding machine, rose type machine, drawing machine is actually a machine, its main purpose is the winding machine winding vertical winding shuttle shaped coil or flat around the shuttle shaped coil pulled into a coil frame, the frame type coil to the inside and outside of the motor stator core circle as the standard, the composition of the coils centripetal angle around the shuttle type coil mechanic 2 can be completed, and pull (up) usually takes 3 people. Pull type before using the computer will coil shape according to the motor repair the actual painted make and made into a template is used to adjust the pull type machine, drawing does not generally to the old coil to adjust the template pull type machine, pull type machine four with a clamp up and down, left and right adjusting mechanism, adjust the clamping machine structure lock locking coils into the pull type program.

Plastic

High voltage motor due to upper plus unequal number of mica insulation material and its thickness increases a lot, the coil end distance and an insulating layer is diverted, little attention, inlay line congestion block not down, cause block line, which requires cold integer. Cold shaping mould (or called positive type mold), the traditional wooden for, each type of motor requires a set of mold making, and my company uses the positive mold have controllable pitch and angle adjustable, adjustable end high flexibility. Must pay attention to beat positive period, not damage the interlayer insulation.

Pull type low-voltage motor, generally no longer cold integer, directly into the embedding procedure.

Mica tape and hot dressing

Stator coil cold conformal, they enter the dressing process, now coil insulation, high grade material basic localization, but mica material quality, price very great disparity. Our company for many years in the making coil and winding of high voltage motor, known as more than a dozen products quality and price, after the student graduates told details of factory. High and low voltage, different seasons of various grades of mica and other materials of different standard subscription. A womanwrapped coil 10 hours a day, a frame shaped coil in the coil perimeter 2 meters million volts is expected to only three. How many grades of various motor coil wrap layers, the first package orpackage after the end of the line to see when the line and block. Mica tape, high stopband, contraction band as the coil, what is the role, which are of good quality, low price, how to bandage, packed in what position, packet number and layer, and so on, the best in attendant learning master and memorize the essentials. My company production of universal mica taping machine, package machine generally under a instead of 3-5 people work, batch production coil manufacturers can choose to buy, repair at the beginning of a motor in the early days of the customer or in the manual dressing as well. A high voltage motor repair the following a few steps to simultaneously: winding, pull type, cold is, Bao Yunmu, high and low resistivity belt. These processes are required to 2-3 people to operate. At the same time the next hot coil working procedure should also start. The main purpose of the hot pressing:

1 after embedding convenient setting.

2 coil curing can be moisture-proof, waterproof dip.

3 corona discharge beyond the notch.

4 on the outside of the closed, avoid high voltage breakdown.

I produced the hot pressing machine length 1.2 meters, on the left, the angle can be adjusted.Customers have a fully automatic computer control of hot pressing machine, 1600kw within yr, Jr, JS, TDK, motor stator coil can be processed. And can be customized according to customer requirements for special machine.

Hot pressing machine can add the automatic control device, such as h temperature in the number of degrees temperature, class F in the number of degrees temperature, hot pressing time to plant, when boot, when standby heat preservation can achieve intelligent, hot pressing to owned to designated manufacturers purchase some release agent, scavenging agent, clearing and residue, and other tools.

Test pressure

Hot coil annealing mode to be placed for a period of time to test the pressure, this is the process of product inspection, in accordance with 3000V, 6000V, 10000v, different working voltage with compression standard for different requirements.

Straight or curved part how to prevent wear, send some shall be held at the time of hot pressing, our company holds several techniques of repair of high-voltage motor coil, holds the pressure after the fight after wearing to copy the coil techniques, which need to personally participate in the learning period can be known.

The pressure of the instrument playing, generally buy more products in Wuhan area.

Self winding to block line is completed, to do a general purpose coil:

1. Leave the model of motor technical data (AWG, number of turns, the insulation thickness, the length of a straight line, camber, end of the minister, lifting height and pitch angle data).

2 for which a coil defective they replace.

High voltage motor to 200kW - 2000kW is in the majority, the weight of the most general in more than 3 tons, according to their own conditions can design suitable for hanging, in order to facilitate the maintenance of motor.

Block line (stator, rotor)

Motor stator and rotor in the dust (usually by the high-pressure water gun flushing) backward into the oven baking, cooling and determine the minor repairs or overhaul motor. High voltage motor repair has a minor repairs proposed tool coil, the rotor line curved tool, stator coil in the movement of hot pressing tool, many similar gadgets, need self-control, the key is combination of technology and experience. How not to damage the primary coil is the key. Removing the coil re processing is time-consuming and laborious, whether the transformation of the old coil is key to save time (general high voltage motor used in making procurement cycle for 1 to 2 weeks, which adversely affected by the repair time, these important issues need to master in the attendant learning).

Minor repairs to the rotor, rotor copper guide (aluminum) to remove, taken out how to change, how to bandage the standard coil production, and how the welding test and a series of processes, here don't discuss one by one. The overhaul of motor rotor, must remove all coils, how to take, how goodis the key technology of coil. Such as high voltage motor, try to complete out. Keep wire is not damaged, re wrapped, can save time, save money. Need to re create the coil, must stringandgauge, a waste of time. Stator embedded line general of each of three coils play a pressure, to prevent the coil on both ends of the slot discharge or on both ends of the end ring discharge and for offline a coil failure caused by damage to the discharge. Whole sets of coils are embedded under the wiring, and distance, grouping, connection, dressing, star, a lead wire of the motor and other operations were conducted in accordance with the operating rules of various grades of motor.General Motors in a star before playing a pressure after sealing together, external wiring can bethree. There are also special connecting 6 lead wire closures, triangle or external star line. Generalwiring need to buy from the high-voltage cable manufacturer specified. All wire wiring is completed,the whole machine call pressure once completed.

Dipping paint

The motor manufacturer of motor production, to purchase vacuum impregnation equipment, theequipment provided by professional manufacturers. General repair factories with electric heating to a certain temperature after turning the stator, the stator up by double pouring paint. A paint filling device of bottom paint. With the finish needed to be more than two hours and then into the oven,bake the first low temperature for three hours, then 18 hours of high temperature drying.Accumulated 24 hours after baked. The purpose is curing bar insulation and insulation grooveinside and outside the wire, to prevent damage to the insulation structure vibration. In addition toplease in the inner cavity of the stator assembly paint residue.

Test

Machine test parameters: the patent technology - magnetic switch transformer starting test equipment to start the 380V, 660V / 1140V, 3000V, 6000V, 10000v, all kinds of motor, high and low voltage can be starting test capacity in less than 1000kW. Where cage, slip ring motor can be no-load start, no-load operation test, the test items divided into current to be measured, the measured voltage, speed, temperature, the amount of noise more than a dozen projects.