3 results about "Backdrive" patented technology

A clutch for preventing backdrive includes a housing, a cover portion located at one end portion of the housing, an external shaft, at least a portion of which is located in the housing, and another end portion of which passes through the housing, a plurality of lockers located inside the housing and surrounding the first end portion of the external shaft, an input shaft, a first end portion of which is inserted into openings of the plurality of lockers and a second end portion of which is configured to pass through the cover portion, and a brake unit configured to be selectively engaged to the lockers to restrict rotations of the lockers. The external shaft is restricted by the lockers so that the external shaft and the lockers are rotated in a rotation direction of the input shaft, and movements of the lockers are restricted by the brake unit when the external shaft is rotated.

The application belongs to the technical field of switching power supply, and provides a current threshold test circuit and method of power switch, the test circuit comprising a driving circuit, a comparator, a reverse driver, a first power switch and a second power switch connected with the driving circuit respectively; the output ends of the first power switch and the second power switch are connected to form a switching node, the switching node is connected with the negative input end of the comparator, the positive input end of the comparator is connected with a reference voltage, the output end is connected with the input end of the reverse driver, and the output end of the reverse driver is connected with the gate of the second power switch to form a closed loop. The comparator and the reverse driver are configured as an operational amplifier, the current limit threshold test is changed from dynamic test to static test, the threshold measurement accuracy and the measurement speed are greatly improved, the test efficiency is improved, sudden shutdown of the power tube under large current condition is avoided, and damage to the device and the automatic test machine is reduced.

The invention relates to a system for inhibiting an electrical anti-torque non-command actuation connected to a flexible shaft assembly of an electrical anti-torque device, the flexible shaft assembly comprising a flexible shaft body and a flexible shaft sleeve surrounding at least a portion of the flexible shaft body, the system for inhibiting an electrical anti-torque non-command actuation comprising: an inhibition circuit comprising an electromagnetic coil mounted on an inner wall of the flexible shaft sleeve and a fluid added with magnetic particles, the fluid being filled between the flexible shaft body and the flexible shaft sleeve, wherein, when the electromagnetic coil is powered, the electromagnetic coil turns the fluid into a Bingham fluid to inhibit a movement of the flexible shaft body; and a power supply control device configured to power the electromagnetic coil of the inhibition circuit in case of electrical anti-torque failure scenario. The invention also relates to an electrical anti-torque device comprising such a system for inhibiting an electrical anti-torque non-command actuation.