2results about How to "Remove overlap" patented technology

This application relates to the field of vehicle manufacturing technology, and discloses a door ring structure and a design method for the door ring structure. The door ring structure includes multiple door ring components, at least some of which have rounded corners. The multiple door ring components are sequentially connected to form a door ring structure with at least one annular door ring. The butt joint between two adjacent door ring components is located outside the area of ​​the rounded corners on the door ring components. Applying the technical solution of this application can improve the strength of the door ring structure and reduce its weight. The door ring structure provided in this application is applied to the body of a vehicle.

The invention relates to the technical field of power electronics, and discloses a regenerative passive soft switching-Boost type PFC (Power Factor Correction) circuit, which comprises a main power transmission loop and a passive regenerative buffer loop. The main power transmission loop constructs an electric energy transmission path. In the passive regeneration buffer loop, a buffer inductor is connected in series with a main switch tube branch, a buffer capacitor is connected in parallel with two ends of a main switch tube, and an auxiliary winding and a main inductor share a magnetic core and are connected to the circuit. According to the circuit, a buffer inductor is used for hindering current abrupt change so as to limit the switch-on current rise rate, a buffer capacitor is used for hindering voltage abrupt change so as to limit the switch-off voltage rise rate, zero-current switch-on and zero-voltage switch-off of a main switch tube are achieved, and meanwhile an auxiliary winding transfers energy captured by a buffer loop in a lossless mode through magnetic coupling and feeds the energy back to a load side. Switching loss is eliminated, electromagnetic interference is suppressed, active control is not needed, and circuit efficiency and reliability are improved.