Modular stator and wind generating set

Abstract

The invention discloses a modular stator and a wind generating set. The modular stator comprises a plurality of stator modules assembled together along a circumferential direction, each stator modulecomprises a stator module core and a multi-phase wave winding wound on the stator module core, one of two phase belts of each phase of wave winding on each stator module is connected with external equipment via a cable, and the other one of the two phase belts is connected with a neutral end ring, and the neutral end ring is connected with the external equipment via the cable. The part of phase belt is lead to the outside of the motor by using the cable, so that the welding link on the modular stator can be reduced, the stable running of the motor is facilitated, and the motor cost can be reduced.

Description

technical field [0001] The invention relates to the field of motor assembly, in particular, the invention relates to a modular stator and a wind power generating set. Background technique [0002] In the global field of direct-drive wind power generation, with the increasing capacity of onshore units and the increasing demand for offshore wind power, the size and weight of direct-drive generators are increasing, which brings a lot of inconvenience to manufacturing, transportation and maintenance. , has become a bottleneck restricting large-capacity wind power generation technology, thereby affecting the competitiveness of the whole machine in domestic and foreign markets. Therefore, the generator is usually designed in a modular manner to solve the inconvenience of large direct-drive wind turbine generators with excessive size and weight. The design of the modular generator reduces the cost of manufacturing, transportation, hoisting, maintenance and management, shortens the...

AI Technical Summary

Problems solved by technology

[0004] At the same time, due to the large number of coil leads, the connection between the coils also needs to be welded, so more man-hours are required for welding

Moreover, when the welding workload is large, there are often phenomena such as virtual welding, and the welding quality is difficult to guarantee, which affects the performance and life of the generator

[0005] Although each stator module is independently designed and manufactured, since the lead wires of the winding coils of all stator modules are all welded on the end ring and the end ring is a complete circular body, the original independent stator modules have been passed through " After the "coil lead wire and end ring welding" link, it becomes an integrated generator stator, which is not conducive to the replacement of the stator module and the balance of the current of each phase during the redundant operation of the generator

[0006] The welding form itself will cause a large unbalance of the contact resistance between the coils and between the coil and the generator end ring after welding, which increases the unbalance of each phase current of the generator, causing the winding circulation to increase and resulting in power generation. Partial overheating of the generator and other problems are not conducive to the long-term stable operation of the generator

The end ring of the generator also needs to be wrapped and insulated, which consumes too much man-hour

[0007] In addition, most of the wires on the stator of the generator are made of copper wires. However, in recent years, wind power installations have tended to be in windy areas with lower wind speeds, so the weight of copper in the generator has increased accordingly, which has increased the cost of effective materials for the generator. Therefore, it is urgent to reduce power generation. machine cost

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