Electrical excitation double salient-pole aerogenerator with wide range of rotation speed

A technology of electrically excited double salient poles and wind power generators, which is applied in the direction of wind power generation, control of generators through magnetic field changes, synchronous generators, etc.

Inactive Publication Date: 2008-04-02
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Using a doubly salient motor with simple structure and high power density can solve the problem of volume weight caused by generator cost and power density

Method used

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  • Electrical excitation double salient-pole aerogenerator with wide range of rotation speed
  • Electrical excitation double salient-pole aerogenerator with wide range of rotation speed
  • Electrical excitation double salient-pole aerogenerator with wide range of rotation speed

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Embodiment Construction

[0014] As shown in Figure 3, the two-phase outer rotor 8 / 12 double salient pole motor of the present invention is mainly composed of the following parts: (1) 8-tooth salient pole stator and A1, A2, A3, A4, B1, B2, B3, B4 eight armature windings; (2) field winding L embedded in the stator slot; (3) salient pole outer rotor with 12 teeth. Working principle: The four armature windings A1, A2, A3 and A4 in the stator slot are connected in series to form A phase, and the four armature windings B1, B2, B3 and B4 are connected in series to form B phase, and the excitation winding L is connected with DC After the current flow, with the rotation of the outer rotor, the distribution of the no-load magnetic circuit at each position of the motor is shown in (a), (b) and (c) in Figure 4 (the magnetic circuit at three typical positions is given distribution diagram), the flux linkage curves of A and B phases are shown in Figure 5, and the back EMF induced at the terminals of A and B two pha...

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Abstract

A wide speed range electrical excitation doubly salient wind turbine generator belongs to a two-phase outer rotor doubly salient wind turbine generator which consists of an outer rotor (1), an inner stator (2), eight armature windings (A1, A2, A3, A4, B1, B2, B3, B4) which are wound on the stator, an excitation winding (L), and a winding diverter switch S. The four armature windings A1, A2, A3, and A4 in a stator slot are serially connected into an A phase, and the four armature windings B1, B2, B3, and B4 are serially connected into a B phase. The two-phase outer rotor doubly salient wind turbine generator can change the phase number of a motor through the diverter switch S to improve an adaptive speed range. The invention is applicable to a direct-drive wind turbine generating system of wide speed variations of a wind turbine.

Description

technical field [0001] The invention relates to the winding design technology of an electric excitation double salient pole generator, in particular to a novel electric excitation double salient pole generator with a wide speed range by changing the number of motor phases through the connection mode of the motor winding. Background technique [0002] As the latest technology in the field of wind power generation, the direct-drive wind power generation system eliminates the need for a speed-increasing gearbox between the generator and the wind turbine, greatly reducing the horizontal axial length of the unit and shortening the mechanical transmission path of wind energy, avoiding The problem of loss, noise and material wear caused by the rotation of the gearbox is eliminated, and the working life of the unit is more guaranteed. In addition, maintenance and replacement of gear box components are omitted, and gear box lubricating oil and oil temperature monitoring are not requi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/14H02K1/24H02K3/28H02K19/16H02P9/14
CPCY02E10/725Y02E10/72
Inventor 魏佳丹周波尹航孟小利张卓然胡朝燕张永帅
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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