Low-pressure and high-power stator preformed winding welding method

Abstract

The invention discloses a low-pressure and high-power stator preformed winding welding method and relates to the manufacturing method of generator stators. The low-pressure and high-power stator preformed winding welding method solves the problems that existing junction welding is difficult, long in preparation time and large in quantity of copper used. The method comprises the steps of coiling a plurality of copper bars into single coil rings, pulling the single coiling rings to form single-turn formed coils, manufacturing a formed coil set with the single-turn formed coils, embedding the formed coil set in a stator machine base, manufacturing a cut formed coil set, manufacturing a connected formed coil set, taking the connected formed coil set out of the stator machine base for welding to form a linkage of formed coil, manufacturing single-linkage insulating formed coils, embedding an integral coil formed by the single-linkage coils in an enclosing mode in the stator machine base to form a stator winding, and splicing the single-linkage insulating formed coils to achieve stator preformed winding welding. According to the low-pressure and high-power stator preformed winding welding method, early-stage preparation work is simple, machining is convenient, labor intensity is low, copper consumption is low, splicing is firm, and the stator machine base does not need to be cleaned.

Description

technical field [0001] The invention relates to a method for manufacturing a generator stator, in particular to a low-voltage high-power stator forming winding welding method. Background technique [0002] At present, the stator windings of low-voltage and high-power three-phase AC generators at home and abroad basically use formed windings. There are generally two types of joints for such windings: [0003] 1. Embed the formed coil into the iron core first, and then connect it inside the machine base. The joint adopts the traditional welding method. [0004] The traditional welding method has the following defects: due to the small space for the operator to weld, it is difficult to weld the joint, it takes a long time, the labor intensity is high, and false welding is easy to occur, and the welding quality cannot be guaranteed; it is not easy to clean the debris in the machine base after welding Welding garbage; when welding, asbestos for fire prevention should be placed i...

AI Technical Summary

Problems solved by technology

[0004] The traditional welding method has the following defects: due to the small space for the operator to weld, it is difficult to weld the joint, it takes a long time, the labor intensity is high, and false welding is easy to occur, and the welding quality cannot be guaranteed; it is not easy to clean the debris in the machine base after welding Welding garbage; when welding, asbestos for fire prevention should be placed in the stator (it is cumbersome and not conducive to the health of the operator)

[0008] The cold pressing method has the following defects: Since the connecting sleeve must also be made of copper, and in order to achieve a better cold pressing effect, it is necessary to design a test cold pressing die for different cross-sectional areas of the number of coils, and there are long preparation times and copper consumption. It has disadvantages such as large size and large space for joints inside the stator, but it also has the advantage of not needing to clean the inside of the machine base after the joints are completed

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