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HS50 (750kW)

Based on expertise and know-how in power generation systems and gearbox manufacturing accumulated over the last 30 years, Hyosung developed the HS50 wind turbine system.

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Hyosung’s HS50 750kW wind turbine is a three bladed, pitch regulated upwind wind turbine with active yaw system. The rotor has three-bladed pitch bearings with full span control. The rotor has a variable pitch system. It helps the blade to be operated in optimized angles at all times to maximize the power production.

Rotor

The rotor of HS50 consists of a hub made of cast iron, three blades and the pitch regulation system. The blade bearings connect hub and each blade.

Blades

The blades are 24.3 meter long and are equipped with a lightning receptor at the tip. The steel cable inside the lightning receptor protects the blade and the hub from lightning. The distance between the root of the blade and the center of the hub is 0.7 meter and, as a result, the diameter of the rotor is 50 meters.

Gearbox

The main gear transmits torque and revolutions from the rotor to the generator. The gear unit is a combination of 1-stage planetary gear and 2-stage helical gear. The main shaft that is connected from the rotor is mounted into an input shaft of the gearbox with shrink disc. Two torque arms support the gearbox, and the pre-tensioned elastomer dampers that is positioned between the torque arm and main frame absorbs the torque and the oscillations. Finally torque is transmitted from the high speed shaft to the generator via a flexible composite coupling that is located between the high speed shaft and generator and behind the brake disc. The brake disc is mounted directly on the high-speed shaft. The gearbox lubrication system is a forced feed system with integrated oil pump.

Generator

The generator has been designed as three-phase asynchronous generator with slip rings. The design maximizes reliable operation and high availability by using the high voltage F-class insulation technology. This ensures a long life span and provides a high momentary overload capacity. The generator is built in accordance with the principal international safety standards.

Yaw system

Yaw system is used to rotate the nacelle that is positioned on the top of tower with its bearing, in order to keep the turbine facing the wind and to untwist the power and other cables when they become excessively twisted. It consists of 4 electric motors installed inside the nacelle, which drives a pinion mounted on a vertical shaft via gear reducer.

Tower

HS50 is mounted on a tapered tubular steel tower which is made of four sections
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