Obtain electrical energy at constant frequency. The purpose of keeping the speed constant in the starting zone of the wind turbine is to obtain electrical energy with a constant frequency. The constant speed of wind power generation is generally achieved by a variable speed gearbox and a variable pitch wind wheel, but reactive power compensation equipment needs to be added. Wind turbines are electrical equipment that convert wind energy into mechanical work, which causes the rotor to rotate and ultimately produces alternating current.
Which is better: a direct drive wind turbine or a dual powered wind turbine?
2pcs
The speed sensor uses magnetoresistance as the sensing element and is a new type of speed sensor. The core component uses magnetoresistance as the sensing component, then uses a new circuitsignal processing to reduce noise and improve functions. Comparing with the output waveforms of other types of tooth speed sensors, the error of the measured speed is extremely small and the linear characteristics are very consistent. The detected objects are magnetic materials or magnetically permeable materials, such as magnetic steel, iron and electricity. steel. When the magnetic or permeable material having protrusions (or depressions) on the measured object rotates while the measured object, the sensor outputs a pulse signal related to the rotation frequency to achieve the speed measurement goal or movement detection.
There is a Hall semiconductor chip in the magnetic field, and a constant current I flows through the chip from A to B. Under the action of the Lorentz force, the flow of electrons from I is deflected to one side as it passes through the Hall semiconductor, causing the film to ggenerate a potential difference in the direction CD, called Hall voltage.
Double-powered wind turbines are currently the most widespread on the market and the technology is relatively mature. However, they have many defects, including the gearbox, which increases the complexity of the system and maintenance costs.
The direct-drive wind turbine is an emerging type of generator that eliminates the need for a gearbox and can achieve greater power generation efficiency at low wind speeds.
Currently, multinational giants are developing direct drive wind turbines. And a 1.5 MW direct drive wind turbine has been put into mass production.