Method for adjusting center of magnetic field of high-voltage motor

Abstract

The invention discloses a method for adjusting the center of a magnetic field of a high-voltage motor. The method includes selecting a testing point; finding static values a and b corresponding to minimum axial vibrating acceleration of a constraint end bearing seat; adjusting distance values between the circumferential end faces of stator iron cores at the front end and the rear end and the circumferential end face of a rotor iron core according to the static values a and b corresponding to the minimum acceleration. By the method, the problem of axial movement of the high-voltage motor can be solved; the method can be widely applied to magnetic field center adjusting of various high-voltage motors.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a method for adjusting the magnetic field center of a high-voltage motor. [0002] Background technique [0003] The length of the stator core of the high-voltage motor is generally slightly shorter than the length of the rotor core. In order to avoid axial movement during the operation of the motor, the centerline of the magnetic field of the stator and rotor core is required to coincide during installation. The distance between the end faces of the core circumference is equal, that is, figure 1 As shown, the centerlines of the magnetic fields of stator 1 and rotor 2 coincide, a=b, so that the current at terminal a affects the bearing axial electromagnetic force F a The axial electromagnetic force F of the bearing with the b-terminal current b Equal in size and opposite in direction,︱Fa+F b ︱=0, when the motor is running, there will be no axial movement of the mo...

AI Technical Summary

Problems solved by technology

[0004] However, due to the differences in the distribution position, shape, length, stiffness, deformation, looseness, vibration, etc. of the coils at the front and rear ends of the stator in space, even if a=b, |Fa| is not exactly equal to |F b ∣, when ∣F a -F b ∣When the value is large, the motor shaft will produce axial movement, and excessive axial movement will be unfavorable to the operation of the high-voltage motor. At this time, the center line 11 of the stator magnetic field does not coincide with the center line 21 of the rotor magnetic field, such as figure 2 shown

Obviously, the above method of adjusting the center of the motor magnetic field cannot meet the requirements of the actual operation of the motor. Even if a=b, there will be a large axial movement problem. Therefore, a new adjustment method has to be found to solve the problem of the motor axial movement problem

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