4-MW coaxial mutual feedback type synchronous motor

Abstract

The invention discloses a 4-MW coaxial mutual feedback type synchronous motor. The 4-MW coaxial mutual feedback type synchronous motor is a four-pole three-phase brushless synchronous alternating current motor and comprises a stator, a rotor, an exciter and a junction box. A stator iron core is formed by overlying superposing units of a plurality of stator punching sheets; each stator punching sheet is square; each superposing unit adopts a regular polygon structure formed by superposing at least two stator punching sheets in the mode that the next stator punching sheet rotates by an angle alpha relative to the previous stator punching sheet; and the superposing units are superposed into the stator iron core in the mode that the next superposing unit defects by an angle beta relative to the previous superposing unit. Three groups of damping grooves are formed on a rotor punching sheet, and each group of damping grooves comprises three damping grooves. The exciter rotor is arranged on the back part of a rotating shaft of a back end plate of a stretching machine base through first to third process ring plates. Three insulating columns and junction copper bars are arranged in a lead box. The 4-MW coaxial mutual feedback type synchronous motor fills the gap of the domestic 4-MW power section synchronous electric generator test machine set.

Description

technical field [0001] The invention relates to a 4MW coaxial mutual-feed synchronous motor used for a synchronous generator test set. Background technique [0002] At present, there is no test bench for synchronous generators of about 4MW in China. There are three items that cannot be tested in all generator tests of this power range. One is the determination of the voltage deviation degree under asymmetric load conditions, which is commonly known as unbalance measurement, and the other is the vibration test that comes with the system. Contents of the invention [0003] The purpose of the present invention is to overcome the defects of the prior art and provide a 4MW coaxial mutual-feed synchronous generator, which reduces the test cost of the generator, and reduces the cost of the product at the same time, filling the domestic 4MW power segment synchronous generator Blank for the test unit. [0004] The object of the present invention is achieved like this: a kind of 4...

AI Technical Summary

Problems solved by technology

[0002] At present, there is no test bench for synchronous generators of about 4MW in China. There are three items that cannot be tested in all generator tests of this power range. One is the determination of the voltage deviation degree under asymmetric load conditions, which is commonly known as unbalance measurement, and the other is the vibration test that comes with the system

Images