Wind turbine generator and gearbox connection

Does a wind turbine have a gearbox?

A gearbox is typically used in a wind turbine to increase rotational speed from a low-speed rotor to a higher speed electrical generator. A common ratio is about 90:1, with a rate 16.7 rpm input from the rotor to 1,500 rpm output for the generator. Some multimegawatt wind turbines have dispensed with a gearbox.

How do you design a wind turbine gearbox?

You are to work in a team to design the gearbox for the wind turbine, which is supported by a 60 foot tall tower. Use a compound reverted gear train to increase the rotational speed from the input to the output. The diameter of the blades is 17 feet. The gearbox consists of spur gears, rolling element bearings, shafts, keys, and retaining rings.

Why is the design of a wind turbine gearbox difficult?

The design of a wind turbine gearbox is challenging due to the loading and environmental conditions in which the gearbox must operate. Torque from the rotor generates power, but the turbine rotor also applies large moments and forces to the wind-turbine drivetrain.

What gearbox ratio does a wind turbine use?

Other wind turbines on the market sit in-between, with gearbox ratios of about 30:1, dispensing with the highest speed stage in a typical gearbox. There is a trade-off between the reliability of gearboxes and gear stages and the cost of slower, higher torque generators.

How are wind turbine transmission systems different from motor-gear systems?

Most recent studies have focused on motor–gear systems, which are significantly different from wind turbine gear–generator transmission systems. From an energy perspective, the motor–gear system converts electrical energy into kinetic energy. However, a wind turbine transmission system converts mechanical energy into electrical energy.

Why is the gearbox the highest maintenance part of a turbine?

The multiple wheels and bearings in a gearbox suffer tremendous stress because of wind turbulence and any defect in a single component can bring the turbine to a halt. This makes the gearbox the highest-maintenance part of a turbine. The electrical generator is mounted inside the nacelle at the top of a tower, behind the hub of the turbine rotor.