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Integrated damping winding, rotor and motor

An integrated technology of damping windings, applied in the field of rotors and motors, can solve the problems of broken damping strips, poor force capacity of a single damping strip, and affecting the service life of damping strips, etc., to achieve easy access, convenient cooling, and increased force capacity Effect

Active Publication Date: 2022-04-12
THE UNIV OF NOTTINGHAM NINGBO CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the damping strip is embedded in the magnetic slot in the rotor core, and the squeeze effect of the damping strip during the start-up process causes the temperature rise of the damping strip to be uneven, and the damping strip produces stress to bend toward the center; the rotor is running During the process, the damping strip is subjected to the alternating action of electromagnetic force and centripetal force, resulting in forced vibration. Combined with other stresses suffered by the damping strip, when the stress exceeds the limit that the damping strip can withstand, the damping strip is prone to breakage
Limited by the fact that several damping strips in the prior art are evenly distributed along the circumference of the pole piece, the force bearing capacity of a single damping strip is poor
The setting method of the damping strip in the prior art limits the structural strength of a single damping strip, which in turn affects the service life of the damping strip

Method used

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  • Integrated damping winding, rotor and motor
  • Integrated damping winding, rotor and motor
  • Integrated damping winding, rotor and motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 2As shown, this embodiment provides an integrated damping winding, including two short-circuit connectors 4 arranged at intervals and at least two integrated damping strips 5 connecting the two short-circuit connectors 4 to realize integrated damping strips 5 For the electrical connection with the short-circuit connector 4 , all the integrated damping strips 5 are arranged circumferentially along the radial direction of the short-circuit connector 4 . The integrated damping strip 5 is made of conductive soft magnetic material.

[0038] The conductive soft magnetic material is martensitic stainless steel or electrical steel. Martensitic stainless steel includes 17-4PH type and 410 type, of which 17-4PH type includes 17-4PH H900 and 17-4PH H1150, and electrical steel includes M235-35A. Such as Figure 6 As shown, the BH characteristic of M235-35A material corresponds to linear I, the BH characteristic of 17-4PH H900 material corresponds to linear II, and ...

Embodiment 2

[0043] Such as figure 1 As shown, this embodiment discloses a rotor, including a rotor core 1 and an integrated damping winding in Embodiment 1. The rotor core 1 is provided with a shaft hole for installing a rotating shaft, and the rotating shaft is installed through the shaft hole. On the rotor; rotor core 1 is provided with an even number of rotor poles 2, each rotor pole 2 is provided with excitation winding 3, integrated damping strips 5 are arranged between rotor poles 2, and short-circuit connectors 4 are respectively arranged on The front and rear ends of the rotor core 1.

[0044] In this embodiment, the material of the rotor core 1 is M235-35A, and the material of the integrated damping strip 5 is 17-4PHH900. Such as Figure 6 As shown, the BH characteristic of M235-35A material corresponds to linear I, and the BH characteristic of 17-4PH H900 material corresponds to linear II. The magnetic field strengths of 6000 amperes per meter, 8000 amperes per meter, 10000 a...

Embodiment 3

[0052] This embodiment discloses a generator, which is a 250kVA generator, which includes a stator and a rotor using an integrated damping winding in Embodiment 2. The rotor core 1 is made of M235-35A material, and the material of the integrated damping strip 5 is 17-4PH H900. On the premise that the stator adopts the stator inclined groove technology, according to the test method of GBT1029-2005, the experiments were carried out at 500r / min, 1000r / min, 1500r / min and 3000r / min, and the experimental results are as follows Figure 7-10 shown. Figure 7-10 They are the comparison charts of the simulation value of the output voltage of the integrated damping winding rotor at 500r / min, 1000r / min, 1500r / min and 3000r / min respectively and the experimental test data. The solid line marked a in the figure is the experimental data, and the mark b The dotted line is the simulated data. It can be seen from the figure that under the speed range of 500-3000r / min, the generator complies wi...

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Abstract

The invention discloses an integrated damping winding, which comprises two short-circuit connectors and at least two integrated damping strips, and all the integrated damping strips are used to be respectively installed between two adjacent rotor poles. Both ends of the integrated damping strip are respectively connected to the short-circuit connector, and the integrated damping strip is made of conductive soft magnetic material. The present invention also provides a rotor and motor using integrated damping windings. Under variable frequency conditions, the integrated damping strips arranged between the rotor poles will generate a large amount of current and generate heat. The integrated damping strips are easy to communicate with the cooling medium contact to facilitate the cooling of the integrated damping strip and reduce the thermal bending forces it generates.

Description

technical field [0001] The invention relates to the technical field of electric motors, and more specifically, relates to an integrated damping winding and a rotor and electric motor to which it is applied. Background technique [0002] The existing salient pole synchronous excitation motor is limited by the salient pole structure of the rotor, and the number of harmonics of the air gap magnetic induction is usually large, which increases the difficulty of reducing the total harmonic distortion number of the terminal voltage of the salient pole synchronous electric excitation motor . At the same time, the outer circular surface of the rotor of the salient pole motor is embedded with a damping bar winding structure. Under the condition of frequency conversion, a large amount of current will be generated in the damping bar winding and heat will be generated. The damping winding embedded in the rotor iron of the motor is not easy to contact with the cooling medium, which aggra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K3/20
CPCH02K3/20
Inventor 王寅利斯特凡诺·诺佐克里斯·杰拉德张何赵伟铎米基尔·加莱亚
Owner THE UNIV OF NOTTINGHAM NINGBO CHINA
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