2results about How to "Rectification" patented technology

The invention relates to a building block type ice melting device active current sharing system and a control method, and the system comprises a plurality of ice melting rectification devices which are connected in parallel to a to-be-ice-melted line, and a bidirectional Buck-Boost current sharing module is connected in series between the DC output end of each ice melting rectification device and the to-be-ice-melted line; and the current sharing controller is used for collecting the output voltage value and the output current value of each ice-melting rectifying device in real time, judging whether the plurality of ice-melting rectifying devices share the current or not, calculating the current sharing control quantity and generating a compensation voltage instruction when the plurality of ice-melting rectifying devices do not share the current, and adjusting the corresponding bidirectional Buck-Boost current sharing module through the compensation voltage instruction, so that the plurality of ice-melting rectifying devices realize the current sharing. High-precision current sharing and effective circulating current suppression can be realized under the condition of not changing the structure of the existing main circuit, and the circuit is suitable for a large-capacity and multi-machine parallel mobile ice melting equipment scene and has a remarkable engineering application value.

The application provides a propeller rectification structure and a vertical take-off and landing fixed-wing unmanned aerial vehicle, and belongs to the technical field of unmanned aerial vehicles. The propeller rectification structure comprises a cantilever, the two ends of the cantilever are respectively provided with motors, the output ends of the motors are provided with double-blade propellers, the two ends of the cantilever are respectively movably connected with rectification covers, a driving mechanism is arranged in the cantilever to drive the rectification covers to move up and down, the rectification covers movably cover the corresponding propellers, and an angle detection mechanism is arranged in the cantilever to detect the rotation angle of the propeller. The application has the following effects: the rectification cover is arranged at the upper end of the propeller, the driving mechanism drives the rectification cover to move away from the propeller during vertical take-off and landing, the angle detection mechanism is matched with the motor to align the double-blade propeller with the rectification cover during level flight and cruising, and then the driving mechanism drives the rectification cover to cover the propeller, so that the rectification of the propeller is realized, the level flight resistance is reduced, and the flight stability is improved.