Stator consists of stator core, winding, frame and other structural components used to fix these components.

Detection method: Alternator is small in size, light in weight, high in power, simple in structure, convenient in maintenance, long in service life and good in charging performance, and is widely used in modern automobiles. With the increase of the number of cars, the repair amount of alternator stator winding is also increasing year by year. It is necessary to master the rewinding methods, skills and experience of stator windings. The common stator core slots of stator winding are slots 30, 36 and 42, and the number of poles is 10, 12 and 14. Most of them are single-chain three-phase windings with Y-connection and pitch 1 ~ 4. Each phase winding is generally wound in series, with no joint in the middle. The connection between adjacent coils in each phase winding can be divided into obvious pole connection and ordinary pole connection. The cathode wiring is connected in reverse series, that is, "head-to-head" and "tail-to-tail", and the number of coils connected in series in each phase is equal to the number of poles. Ordinary poles are connected in series, namely "head and tail" and "tail head", and the number of coils connected in series in each phase is equal to half of the number of poles. When removing and cleaning the winding buried wires, the method of burying one phase winding first and then the other phase winding is generally adopted to form a "three-sided" end. In addition, the length of the stator core is short. In order to ensure the performance index of the core, the manual cold disassembly method should be adopted. The more time-saving and labor-saving operation method is: use one! Cement steel nails about 3mm (the tip needs to be smoothed by grinding wheel), bamboo slot wedges are punched out one by one from one end, and then pulled out from the top phase winding one by one with needle-nosed pliers, and finally a complete coil is retained. Then cut it from the end with oblique nose pliers and count the turns. Select the shortest wire, measure the length of the coil, take the average value as the basis of mold positioning, and record the relevant original data in the form of table 1 as the repair technical data. At present, there is no special coil mold for winding and grooving insulating paper in the market, and it can be replaced by movable ceiling fan mold in practice. The base number of the circumference of this mold is 9, 10,1,12, 13, 14cm, and it can be wound 9 times at a time, which is very convenient for demoulding. Ordinary pole connection, the number of series coils in each phase is 5 ~ 7, which can be wound at one time. Salient pole connection, the number of series coils in each phase is 10 ~ 14. When only 1 set of dies is available, each phase winding needs to be divided into two windings with a joint in the middle. When you have two sets of molds at hand, you can use them together again, or you can wrap them together at one time without a joint in the middle. When winding coils, it is necessary to ensure that the wire diameter is consistent with the number of parallel turns, the number of turns is accurate, the circumference size is equivalent, and the leveling ruler does not cross. Before demoulding, both sides of each coil must be tied tightly with thin copper wires to avoid looseness and make it difficult to embed the wires. The insulation of stator winding is generally sealed with folded edges, and insulating paper is also used as slot paper. The thickness of insulating paper is 0.20 ~ 0.25mm, and the width is 6 ~ 8mm longer than the length of wire core. The polarities of two adjacent coils in one phase of winding buried pole wiring should be opposite and connected in series in reverse, so the odd coils are embedded in the slot upside down and can be connected head to tail. After the effective edges of the two coils are placed in each slot, the slots can be sealed. Ordinary pole connection means that two adjacent coils of a phase have the same polarity. In order to connect in series, just put the effective edge of a coil into each slot and seal the slots. No matter what kind of wiring, after the A-phase winding is embedded, the B and C phases are embedded. At this time, the end of the embedded coil is higher than the bottom of the slot, which affects the entry of other coils. It is necessary to press the end. The specific method is: which part of plastic surgery needs to be pressed down, available! A cross screwdriver of about 5mm, with its tip against the nearest notch, can be pressed down, which is very convenient, labor-saving and fast. After the winding wiring is embedded, there will be six lead-out terminals on the stator, as shown in figure 1. The key step is "phase inversion", that is, 1, 2, 3 or 4, 5 and 6 in the figure need to be connected together to form the "N" line of the generator, and the other three terminals are A, B and C phase output lines. The forming of the winding and the integral forming of the bundled winding are very simple. First, tap the inside of the coil end under the rod pad with a hammer. If you use a special rubber hammer, you don't need a pad, and then tap it from the outside to the inside to close the winding end. Impregnation and drying of the winding Because the winding is a wearing part, in order to improve the mechanical strength of the winding, enhance moisture resistance, heat conduction, heat dissipation and delay aging, qualified stator windings need to be impregnated with paint and dried. At present, the economical method is to pre-dry the stator with 220V500W iodine tungsten lamp (commonly known as small sun lamp). When the temperature is cooled to 70 ~ 80℃, brush with 1032 alkyd insulating paint, stop dripping paint for 30 minutes, and then dry at 130 ~ 140℃.