CN211655927U

CN211655927U - Power supply device for variable pitch system of wind driven generator

Info

Publication number: CN211655927U
Application number: CN201922356115.5U
Authority: CN
Inventors: 蒋作平; 胡捷; 周绍君; 袁炜
Original assignee: Shanghai Ghrepower Green Energy Co Ltd
Current assignee: Shanghai Ghrepower Green Energy Co Ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-10-09
Anticipated expiration: 2029-12-20

Abstract

The utility model discloses a power supply unit that aerogenerator becomes oar system and uses, including aerogenerator rotor and the oar system generator that becomes, its characterized in that, the inside cavity of aerogenerator rotor, the left end is connected with wheel hub, becomes oar system generator and locates inside being close to wheel hub one end of aerogenerator rotor, becomes the outside stator of oar system generator and is connected with the aerogenerator rotor, becomes the inside rotor of oar system generator and passes through the transmission shaft and be connected with the outside motor of locating the aerogenerator rotor, the rated revolution of motor be greater than aerogenerator rotor operation rotational speed. The utility model discloses mainly utilize the principle of generator rotor and stator contactless transmission energy, through the conversion of electric energy-mechanical energy-electric energy, supply power for the oar system that becomes. The device has the characteristics of low cost, safety, reliability and the like, and is suitable for equipment sensitive to cost, such as a medium-sized wind driven generator and the like.

Description

Power supply device for variable pitch system of wind driven generator

Technical Field

The utility model relates to a power supply unit that aerogenerator becomes oar system and uses is applied to medium-sized aerogenerator and becomes oar system, belongs to wind power generation technical field.

Background

Power supply and signal transmission of a pitch system of a medium-sized wind driven generator generally use slip rings. For a wind driven generator adopting an independent variable pitch system, the requirement on the power of the slip ring is high, the requirement on the number of channels is high, and the cost of the existing slip ring is high.

The chinese utility model patent application CN105490380 discloses a power supply device in a wind power generation pitch system, which comprises a power loop power supply module and a control loop power supply module; the power loop power supply module is respectively connected with a slip ring inlet wire of the wind turbine generator and a variable pitch motor of a variable pitch system, the control loop power supply module is connected with the slip ring inlet wire and the variable pitch control system of the wind turbine generator, and the variable pitch control system is also connected with the variable pitch motor; the power loop power supply module transmits the electric energy of the slip ring inlet wire to the variable pitch motor in an inductive coupling mode, and/or the control loop power supply module transmits the electric energy of the slip ring inlet wire to the variable pitch control system in a near-field resonance mode. The utility model discloses an application focus on the modification and optimize electric power supply circuit, optimize return circuit electric property.

The chinese utility model patent application CN108425797 discloses an electronic oar system that becomes of no sliding ring structure aerogenerator and control method thereof, the system is including becoming oar motor system, pitch angle sensor, vary voltage deflector, controller, wheel hub wireless communication equipment, energy storage battery, transformer, PMSM, variable displacement motor, variable displacement pump, main shaft, cabin wireless communication equipment and cabin total controller. The method cancels a slip ring component of a variable pitch system for transmitting electric energy and signals, directly generates electric energy in a rotating hub and supplies power to a controller in the hub, the variable pitch system and an energy storage battery, control signal transmission between the variable pitch system and an engine room is completed by wireless communication equipment, the variable pitch system does not need external power supply, can fully utilize energy absorbed by a wind wheel in the starting and stopping processes of a fan, cancels a slip ring structure in a variable pitch wind turbine, is suitable for a direct-drive wind driven generator, and has good conversion application prospect under the background of large-scale wind turbine development. The utility model discloses an although the application does not use the sliding ring yet, nevertheless become the power supply of oar system and mainly be through the rotation of wind wheel self, drive the generator and realize the power supply. The energy used is converted into: the wind energy is directly converted into the electric energy used by the variable pitch system. The device can only supply power when wind or wind wheel rotates, and has complex structure and higher cost.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is that there is with high costs shortcoming in current high-power sliding ring technique.

In order to solve the technical problem, the technical scheme of the utility model provides a power supply unit that aerogenerator becomes oar system and uses is provided, including aerogenerator rotor and the oar system generator that becomes, its characterized in that, the inside cavity of aerogenerator rotor, the left end is connected with wheel hub, becomes oar system generator and locates inside being close to wheel hub one end of aerogenerator rotor, becomes oar system generator outside stator and is connected with the aerogenerator rotor, becomes oar system generator inside rotor and passes through the transmission shaft and be connected with the outside motor of locating the aerogenerator rotor, the rated revolution of motor be greater than aerogenerator rotor operation rotational speed.

Preferably, a first coupler is arranged at the joint of the rotor and the transmission shaft in the generator of the variable pitch system, and a second coupler is arranged at the joint of the transmission shaft and the motor.

Preferably, a motor bracket is arranged outside the motor.

Preferably, the rated rotation speed of the motor is 1500RPM to 3000 RPM.

The utility model discloses be applied to medium-sized aerogenerator's the system of becoming oar, also can be used to large-scale wind generating set, provide one set of low-cost power supply unit that becomes oar system usefulness.

The utility model discloses mainly utilize the principle of generator rotor and stator contactless transmission energy, through the conversion of electric energy-mechanical energy-electric energy, supply power for the oar system that becomes. The device has the characteristics of low cost, safety, reliability and the like, and is suitable for equipment sensitive to cost, such as a medium-sized wind driven generator and the like.

Drawings

Fig. 1 is a schematic structural diagram of a power supply device for a pitch system of a wind turbine provided in this embodiment.

Detailed Description

In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

Examples

The utility model discloses power supply unit that becomes oar system and use mainly realizes through following technical scheme:

as shown in fig. 1, the medium-sized wind generating set adopts a direct-drive mode, and a rotor 1 of the wind generating set is directly connected with a hub. The wind driven generator rotor 1 is a hollow shaft, one end connected with the hub is provided with a variable pitch system generator 7, and the wind driven generator rotor 1 is connected with an external stator of the variable pitch system generator 7. And the rotor inside the variable pitch system generator 7 is connected with the transmission shaft 5 through a first coupling 6. Similarly, the transmission shaft 5 is also connected with the motor 3 through a second coupling 4. The motor 3 is mounted on the motor bracket 2.

When the wind driven generator operates, the rotor 1 of the wind driven generator and the stator of the variable pitch system generator 7 rotate synchronously and are relatively static. At this point, the motor 3 and motor support are stationary. When the variable pitch system needs to supply power, the motor 3 is started, and the motor 3 drives the rotor of the generator 7 of the variable pitch system to rotate through the transmission shaft 5. Because the rotating speed ratio of the rotor 1 of the wind driven generator is low (generally 30-60 RPM), and the rated rotating speed of the motor 3 is high (generally 1500 RPM-3000 RPM, and can be adjusted according to transmission power), the rotor and the stator of the variable pitch system generator 7 have a rotating speed difference, and the variable pitch system generator 7 generates current for the variable pitch system.

The energy transmission of the whole power supply device adopts an electric energy-mechanical energy-electric energy mode, is suitable for a variable pitch system of the wind driven generator, replaces a slip ring to transmit electric energy, and reduces the cost of the variable pitch system.

Claims

1. Power supply unit that aerogenerator becomes oar system and use, including aerogenerator rotor (1) and change oar system generator (7), its characterized in that, the inside cavity of aerogenerator rotor (1), the left end is connected with wheel hub, it is close to wheel hub one end that aerogenerator rotor (1) is inside to change oar system generator (7) to locate, it is connected with aerogenerator rotor (1) to change oar system generator (7) outside stator, it is connected with motor (3) of locating aerogenerator rotor (1) outside through transmission shaft (5) to change oar system generator (7) inside rotor, motor (3) rated revolution be greater than aerogenerator rotor (1) operation rotational speed.

2. The power supply device for the pitch system of the wind driven generator according to claim 1, wherein a first coupling (6) is arranged at the joint of the rotor inside the generator (7) of the pitch system and the transmission shaft (5), and a second coupling (4) is arranged at the joint of the transmission shaft (5) and the motor (3).

3. The power supply device for a pitch system of a wind turbine according to claim 1, wherein the motor (3) is externally provided with a motor bracket (2).

4. A power supply arrangement for a pitch system of a wind turbine according to claim 1, wherein said electric machine (3) has a nominal speed of 1500-3000 RPM.