Electric stepless speed change double power flow wind-power generator set

A technology of wind power generating set and stepless speed change, which is applied in the direction of wind power generator combination, wind power engine, wind power engine control, etc. It can solve the problems of increased difficulty in generator design and manufacture, wind energy can not be fully utilized, etc., and achieve wind energy utilization efficiency High, simplified structure, and improved reliability

Active Publication Date: 2010-05-19
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the direct drive generator works at a low speed of tens of revolutions per minute, in order to ensure that its output voltage is within the normal frequency range (30-80Hz), the generator needs to adopt a larger diameter of the stator and rotor and more poles. Logarithmic, adding difficulty to the design and manufacture of generators
On the other hand, wind energy has randomness, fluctuating from big to small. In the current wind power generation system, when the wind speed is lower than the rated wind speed, the wind wheel can absorb wind energy to the maximum extent, and when the wind speed is higher than a certain limit, in order to maintain power generation The output frequency of the machine is basically constant, and the wind rotor is stalled by adjusting the pitch of the blades, so that the wind energy cannot be fully utilized

Method used

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  • Electric stepless speed change double power flow wind-power generator set
  • Electric stepless speed change double power flow wind-power generator set
  • Electric stepless speed change double power flow wind-power generator set

Examples

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Embodiment Construction

[0016] figure 1 It is the schematic diagram of the composition of the generating set, which mainly consists of five parts: wind turbine 1, electric continuously variable transmission (in the dotted line frame) 2, generator 3, second power converter 4, and first power converter 5; The electric continuously variable transmission 2 is the key component of the system. It is essentially two concentrically arranged motors. This part includes stator 2.1, outer rotor 2.2, inner rotor 2.3, and slip ring 2.4. Multi-phase (3 phases in the figure) windings are connected to the first power converter 5 through slip rings and brushes; multi-phase windings (3 phases in the figure) are also placed on the stator and connected to the second power converter 4; The rotor structure can be a cage rotor, a permanent magnet rotor or other types according to the type of motor used; the transmission has two shafts, figure 1 The left shaft in the center is the input shaft, which is connected to the wind...

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Abstract

The invention relates to an electric stepless speed-variable dual-power wind generator, wherein the electric stepless speed changer (2) comprises a stator (2.1), an outer rotor (2.2), an inner rotor (2.3), and a sliding ring (2.4). The wind turbine (1) via an input axle (6) is connected with the rotor (2.3), the sliding ring (2.4) is mounted on the axle (6), the circumference of the rotor (2.3) isdisposed with the rotor (2.2), the circumference of the rotor (2.2) is disposed with the stator (2.1) which via an output axle (7) is connected to a generator (3), the rotor (2.3) is disposed with amulti-phase winding to connect a first power converter (5) via the sliding ring (2.4) and an electric brush, the stator (2.1) is arranged with a multi-phase winding and connected with a second power converter (4), the first and second power converters (4, 5) are connected with one direct-current power.

Description

technical field [0001] The invention is a function that can steplessly adjust the rotating speed of a generator so that the rotating speed of the wind-driven generator does not change with the change of the wind speed, and realizes the output of variable wind speed and constant frequency, and belongs to the technical field of wind-driven generator manufacturing. Background technique [0002] As the whole society continues to pay attention to energy and environmental issues, the development and utilization of renewable energy is showing a trend of accelerated development. Wind energy exists widely on the earth and is currently one of the most mature renewable energy technologies that people have mastered. . A wind turbine is a device that converts mechanical energy into electrical energy in a wind power generation system. It is a tool that connects the prime mover with the output electrical energy. It not only directly affects the quality and efficiency of the output electric...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D7/04F03D9/00H02K51/00H02K16/02H02K1/26H02K1/27H02J15/00H02J7/00F03D9/25
CPCY02E10/723Y02E10/725Y02E70/30Y02E10/72
Inventor 程明花为
Owner SOUTHEAST UNIV
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