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Mixing adjustable excited non salient pole rotor for large air-cooled turbine generator

A technology of turbogenerator and hidden pole rotor, which is applied in the direction of magnetic circuit rotating parts, magnetic circuit shape/style/structure, etc., which can solve the problem of high rotor temperature and achieve the effect of reducing temperature

Inactive Publication Date: 2010-12-15
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing steam turbine generator increases the current density of the rotor winding in order to increase the capacity, which causes the internal temperature of the rotor to be too high, and provides a large-scale air-cooled steam turbine generator with hybrid adjustable excitation hidden pole rotor

Method used

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  • Mixing adjustable excited non salient pole rotor for large air-cooled turbine generator
  • Mixing adjustable excited non salient pole rotor for large air-cooled turbine generator
  • Mixing adjustable excited non salient pole rotor for large air-cooled turbine generator

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specific Embodiment approach 1

[0015] Specific implementation mode one: the following combination Figure 1 to Figure 6 Describe this embodiment. This embodiment includes a quadrupole rotor core 1 and two sets of rotor windings 2. Four large teeth 1-1 and four groups of small teeth 1-2 of the quadrupole rotor core 1 are arranged at intervals. Adjacent teeth There are tooth slots 1-3 between the tooth slots, and the bottom center of each tooth slot 1-3 has a rotor auxiliary slot 1-4, and the slot width of the rotor auxiliary slot 1-4 is smaller than the slot width of the tooth slot 1-3.

[0016] It also includes a plurality of permanent magnets 3, a permanent magnet 3 is embedded in the bottom of each slot 1-3, and a set of rotor windings 2 is wound on every two groups of small teeth 1-2, and the rotor winding 2 is located above the permanent magnets 3.

[0017] In this embodiment, a shoulder structure is formed at the junction of the tooth slots 1-3 and the rotor auxiliary slots 1-4, and this shoulder struc...

specific Embodiment approach 2

[0019] Specific implementation mode two: the following combination Figure 1 to Figure 6 This embodiment will be described. This embodiment is a further description of the first embodiment. The magnetic field generated by the rotor winding 2 is in the same direction as the magnetic field formed by the permanent magnet 3 . Other components and connections are the same as those in Embodiment 1.

[0020] image 3 Shown in this embodiment, when the current of the rotor winding 2 is zero, the distribution diagram of the magnetic force lines generated by the permanent magnet 3; Figure 5 Shown is a distribution diagram of the flux lines of the magnetic field formed by the rotor winding 2 . Depend on image 3 and Figure 5 It can be seen that the magnetic field generated by the electric excitation of the rotor winding 2 and the individual excitation of the permanent magnet 3 is a quadrupole distribution, and the magnetic pole distribution is the same. When the rotor winding 2 on...

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Abstract

The invention relates to a mixing adjustable excited non salient pole rotor for a large air-cooled turbine generator, which belongs to the technical field of motors and solves the problem of high temperature in the rotor of a traditional turbine generator caused by enhancement of current density of rotor windings in order to increase capacity. The rotor comprises a four-pole rotor iron core and two sets of rotor windings; four large teeth and four groups of small teeth of the four-pole rotor iron core are distributed at intervals; tooth grooves are arranged between adjacent teeth; the bottom center of each tooth groove is provided with a rotor assistant groove; the width of the rotor assistant groove is smaller than that of the tooth grooves; the rotor also comprises a plurality of permanent magnets; the bottom of each tooth groove is embedded with a permanent magnet; each two groups of small teeth is wound with a set of rotor winding; and the rotor windings are positioned above the permanent magnets. The rotor is used for improving the traditional turbine generator.

Description

technical field [0001] The invention relates to a large-scale air-cooled turbogenerator hidden pole rotor with hybrid adjustable excitation, which belongs to the technical field of motors. Background technique [0002] The turbogenerator rotor is used to transmit the load torque supplied by the steam turbine. When the turbogenerator rotor winding is supplied with excitation current, a strong magnetic field will be generated on the rotor body. The rotor winding is also called the excitation winding, and the ratio of its excitation power to the capacity of the main engine is about 0.4%-1.0%. For example, the excitation capacity of a 300MW class generator is 1200-1650KW. Due to the high density of the rotor winding, its excitation current will cause the rotor parts of the motor to heat up. When the temperature distribution is uneven, it will also cause mechanical vibration of the motor caused by thermal imbalance. Large-capacity turbogenerator rotors often have problems such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27H02K1/26
Inventor 李伟力曹君慈管春伟张晓晨沈稼丰薛易殷巧玉
Owner HARBIN UNIV OF SCI & TECH
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