Abstract: The present invention provides a high-side current acquisition and safety protection circuit of a power electronic switch, including a power electronic switch for driving a load, a power supply for providing power energy for the power electronic switch, a control module for sensing the current source signal contained in the power electronic switch and converting the sensed current source signal into a control signal for safety protection of the power electronic switch, and an isolated power source that provides working power for the control module, wherein the negative pole of the isolated power source is connected to the positive pole of the power supply. The invention has simple structure, reliable control, and low cost.

Abstract: A continuously variable speed power bearing includes a bearing driving inner ring, a bearing driven outer ring, and a movable tooth assembly. A circle of movable tooth grooves are arranged on a periphery of the bearing driving inner ring, the movable tooth assembly is embedded into corresponding movable tooth grooves in a one-to-one mode. The bottoms of the movable tooth grooves are connected to a high-pressure oil inlet. An inner peripheral surface of the bearing driven outer ring is a variable diameter surface, and the variable diameter surface is evenly divided into a plurality of equal parts. Each corresponding equal part has an equal variable diameter and the same direction, and an outer end part of the movable tooth assembly fits the variable diameter surface.