Xinjiang Goldwind Science & Technology has filed a patent for a control method and apparatus for a permanent magnet generator. The method involves determining current reference values, optimizing them for torque-current ratio, and controlling the generator based on these values. The torque-current ratio is calculated using input from a wind turbine main controller. GlobalData’s report on Xinjiang Goldwind Science & Technology gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Xinjiang Goldwind Science & Technology, Ram air turbine was a key innovation area identified from patents. Xinjiang Goldwind Science & Technology's grant share as of January 2024 was 49%. Grant share is based on the ratio of number of grants to total number of patents.

Control method for permanent magnet generator optimizing torque-current ratio

Source: United States Patent and Trademark Office (USPTO). Credit: Xinjiang Goldwind Science & Technology Co Ltd

The patent application (Publication Number: US20240022190A1) discloses a control method for a permanent magnet generator used in wind turbines. The method involves determining initial values for active and reactive current references of the generator, searching for optimal current reference values to maximize the torque-current ratio, and controlling the generator based on these values. The torque-current ratio is calculated using a torque command value from the wind turbine main controller and the generator's output current. The method also includes acquiring control parameters from the main controller and generator parameters to calculate the initial current reference values. The search for optimal values can be done online using a hill-climbing method or offline using a table lookup method. The patent further describes a control apparatus and computer-readable storage medium implementing this method, as well as an electronic device capable of executing the method.

In summary, the patent application presents a detailed control method for optimizing the performance of a permanent magnet generator in wind turbines. By determining initial current reference values, searching for optimal values to maximize torque-current ratio, and controlling the generator based on these values, the method aims to enhance the efficiency and operation of the generator. The inclusion of different search methods and the utilization of control apparatus and computer programs demonstrate a comprehensive approach to improving the functionality of permanent magnet generators in renewable energy systems.

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