4results about How to "Avoid air gap" patented technology

The application discloses a synchronous motor stator structure and a manufacturing method thereof. The synchronous motor stator structure comprises a plurality of stator cores, a plurality of winding assemblies and a glue pouring layer. Each stator core is a circular ring segment. An outer diameter surface of each stator core is at least partially formed with a support portion. The support portion is located at a middle portion of the stator core along the circumferential direction of the stator core. Adjacent two stator cores are inserted into each other along the circumferential direction. The plurality of winding assemblies are sleeved on the stator cores. Two winding assemblies are arranged between any adjacent two support portions. The two winding assemblies are respectively abutted to the two support portions at one end of the winding assemblies which is away from each other. A gap is formed between the two winding assemblies at one end of the winding assemblies which is close to each other. The plurality of winding assemblies and the plurality of stator cores are matched to form a ring structure. The glue pouring layer is annular and covers the ring structure. The glue pouring layer does not fill the gap. Through the above arrangement, the occurrence of air corona caused by excessive local electric field strength can be avoided, and the service life of the synchronous motor stator structure is improved.

The present application relates to a kind of air duct systems, including shell, motor assembly housed in shell and the air duct mechanism of cooling motor assembly, motor assembly has fixed stator in shell and the rotor of passing in stator, air duct mechanism has the drive fan installed in rotor, drive fan rotation generates cooling gas, air duct mechanism includes by the flow guide member rotated by cooling gas, first air duct formed between stator and shell and the second air duct independent of first air duct, second air duct is at least partially downstream of flow guide member, and, angle grinder using the air duct system has excellent heat dissipation performance and dustproof performance.

According to the cable seamless welding method provided by the invention, the two cables can be seamlessly connected in a mode of being integrally welded with the original cable body, the current-carrying performance and the strength of a connecting joint which is manufactured by the cable seamless welding method and is used for connecting the two cables are consistent with those of the cable body, and the cable seamless welding method is high in reliability. And the cable seamless welding method reduces the experience dependence on operators, and improves the consistency and reliability of cable connection work.

This invention proposes a brushless excitation load-reducing vertical synchronous motor with a disc spring floating exciter stator, belonging to the technical field of vertical synchronous motors. It solves problems such as high thrust bearing load, unreliable excitation system, disconnect between excitation and load reduction functions, exciter only having power generation function, and complex active control in existing vertical motors. It includes a thrust bearing assembly, a bearing housing, a thrust head, an exciter rotor, an exciter stator, a flexible assembly, a top cover, and a rectifier disk. The thrust bearing assembly is installed at the bottom of the bearing housing, the main motor shaft is installed in the middle of the bearing housing, the thrust head is installed on the outside of the main motor shaft, the exciter rotor is installed on the outside of the thrust head, the exciter stator is installed above the exciter rotor, the upper end of the exciter stator is connected to the flexible assembly, and the rectifier disk is installed on top of the thrust head. It is mainly used as a drive motor for heavy-load, high-axial-force, and continuous operation conditions such as vertical water pumps, vertical water turbines, and vertical axial-flow pumps.