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Direct-driving electric excitation double-salient pole fault-tolerance aerogenerator

A technology of electrically excited double salient poles and wind power generators, applied in the direction of synchronous generators, synchronous machines, electrical components, etc., can solve the problem of high voltage distortion, and achieve low power supply voltage distortion, small volume and weight, and low switching frequency Effect

Inactive Publication Date: 2008-08-20
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0005] The phase winding potential harmonics of the electrically excited doubly salient generator are rich and close to 120-degree square wave. If it is used as an alternator, the voltage distortion will be high

Method used

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Embodiment Construction

[0031] Since the structure of the direct drive double salient fault tolerant wind turbine with motor poles k greater than or equal to 3 is similar to that of the direct drive double salient fault tolerant wind turbine with the motor pole k equal to 4, the following structure is 24 / 16 (k=4, N=1) direct-drive electric excitation doubly salient fault-tolerant wind power generator to illustrate a specific implementation.

[0032] The direct-drive electric excitation doubly salient pole fault-tolerant wind power generator of the present invention comprises two parts, a multi-pole electric excitation doubly salient motor and a power device. The multi-pole electric excitation double salient pole motor has a 24 / 16 structure (k=4, N=1), that is, the number of stator poles is 24, and the number of rotor poles is 16. It is composed of four 6 / 4 structural unit motors, such as figure 1As shown, the direction of the arrow in the figure represents the direction of the excitation magnetic fie...

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Abstract

A direct-driven electric excitation double convex pole fault-tolerant wind-driven generator belongs to the wind-driven generator. The wind-driven generator is composed of two parts of a multi-pole electric excitation double convex pole electric motor and a power device. The unit electric motor are divided into C groups (C>=3). The number of each group of unit electric motor is same. The three-phase winding of each group of unit electric motor is inverted to 120 degree step wave alternating current by the full-bridge inverter respectively after the commutation of the rectification circuit. The phase displacement between the step wave alternating current outputted by the inverters of each group of unit electric motor is 90 / C degree electrical degree. When the outputs of inverter of each group of unit electric motor have been series-connected the load is provided with alternating current, the generator can still work normally after the occurring of fault and satisfies the high-reliability request of the wind-driven generator and at the same time has the advantages of low switching frequency of the amplifier tube of the inverter, small electric voltage and current stress, small distortion factor of the power-line voltage and small cubic weight.

Description

1. Technical field [0001] The direct-drive electric excitation double salient pole fault-tolerant wind power generator of the invention belongs to the wind power generator. 2. Technical background [0002] Wind power is a clean energy that can reduce the consumption of traditional fossil energy and environmental pollution. Actively developing and utilizing wind power is of great significance to improving the energy structure and protecting the ecological environment. At present, wind power generation technology is developing in the direction of high efficiency, high reliability and low cost. The direct-drive wind turbine saves the gearbox, has the advantages of less investment, less transmission chain loss, low maintenance cost and high reliability, and has attracted widespread attention at home and abroad. [0003] The reported direct-drive wind power generators mainly include permanent magnet alternators, brushless doubly-fed alternators and switched reluctance generators...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K19/24H02K1/14H02K1/24H02K19/00
Inventor 朱德明周楠严仰光张卓然陈志辉
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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