Salient pole synchronous motor rotor with integrated solid structure

Abstract

The invention discloses a salient pole synchronous motor rotor with an integrated solid structure. The rotor comprises a pole shoe, a magnetic pole, a rotation shaft and an exciting winding, wherein the pole shoe, the magnetic pole and the rotation shaft are machined into an integrated salient pole rotor structure by using a forge piece, the salient pole rotor structure is reserved with a space for arranging the exciting winding, the exciting winding is formed by directly winding on the rotor, and an elastic support device is arranged under the exciting winding.According to the salient pole synchronous motor rotor with the integrated solid structure provided by the invention, the pole shoe, the magnetic pole and the rotation shaft are machined into the integrated structure by using the forge piece with both excellent magnetic performance and mechanical property, without using a combining bolt, so that the whole carrying capacity is stronger, the rigidity is better, the capacity of themotor can become larger, and thus the rotor can bear larger centrifugal force, the stress of the rotor component is smaller under the effect of the same centrifugal force, and the security reliabilityis greatly improved; the surface of the pole shoe is a continuous curved surface without sharp corners and edges, so that the situation that local part heats seriously is eliminated, the magnetic field waveform is better, and the higher harmonic content becomes little.

Description

technical field [0001] The invention belongs to the technical field of salient-pole synchronous motors, in particular to a salient-pole synchronous motor rotor with an integral solid structure applied to high power and high speed. Background technique [0002] The salient pole synchronous motor is a type of rotating electrical machine, which has a stator and a rotor rotating around the central axis. The rotor is the carrier of mechanical energy transmission and the magnetic field of the motor. There is an excitation winding on the rotor that generates the magnetic field of the motor. The excitation winding is welded or bent by copper plates. The centrifugal force of the excitation winding is borne by other components on the rotor. In high-power (10-60MW), medium-high-speed (1500-1800r / min) salient pole synchronous motors, in order to solve the high stress problem caused by large size and high speed, integrally forged magnetic poles are often used instead of laminated magneti...

AI Technical Summary

Problems solved by technology

[0005] 1. The centrifugal force of the field winding and the pole shoe is borne by the bolts. The bolts have high stress, so high-strength bolts must be used. The quality and installation of the bolts are very high, and there is a risk of bolt breakage, and the loss caused by the breakage of the bolts will be very high. Big

[0006] 2. There are bolt holes on the outer surface of the pole shoe. When the motor is started, the eddy current will generate heat at the edges and corners. When the motor is started improperly, the pole shoe will heat up severely, causing the rotor to deform.

[0007] 3. The bolt holes on the outer surface of the pole piece cause the distortion of the magnetic field waveform and the increase of the voltage harmonic content

[0008] 4. Limited by the bolt strength limit, the diameter of the rotor cannot be larger, and the capacity of the motor is limited

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