30results about How to "Eliminate angle" patented technology

Problems with accuracy reading position detection signal peaks and minute phase differences in the detection current make motor drive control easily susceptible to differences in motor characteristics. The rotor position is determined based on whether or not a terminal difference voltage, which is the difference voltage between the motor terminal voltage and the pseudo-neutral-point voltage when the motor phases are selectively energized, exceeds a specific threshold value. The phase energized to start the motor is determined based on this determination and the motor is energized accordingly to start. Instead of switching directly from the search step at the initial rotor position to the back-EMF voltage mode, a search and start mode that creates initial rotor speed sufficient to start the motor is executed before entering the back-EMF voltage mode.

Provided is a swing arm device. The device comprises a frame mechanism, a swing arm disposed on the frame mechanism, a ground flat board movably connected to the swing arm and a swing arm tilting oilcylinder used for pushing the swing arm to rotate in order to drive the ground flat board to move. A rotary fulcrum of the swing arm is connected with the frame mechanism. With the swing arm device, insufficient obstacle removal is avoided by preventing the failure of an existing flat board to completely touch the ground. The swing arm device is safe and convenient to operate. The flat board can be controlled to wholly place on the ground. The included angle between the flat board and the ground is basically eliminated. Therefore, all kinds of vehicles can be moved to the flat board very conveniently. The swing arm device is reasonable and ingenious in design, convenient in obstacle removal, broad in application scope and high in practicality and is safe and reliable.

The invention relates to a perspective LED displayer, which meets the demands of displayer transmission, realizes the requirement of natural lighting inside the building in the back of the displayer, at the same time realizes the application of an outdoor raster sticking LED displayer, guarantees the neatness of the outdoor raster sticking LED displayer and realizes the function of controlling the gap between adjacent modules, thereby greatly ensuring the displaying effect of the outdoor raster sticking LED displayer. Furthermore, the fast assembly and detachment of the outdoor raster sticking LED displayer are ensured, thereby being greatly convenient for application of the outdoor raster sticking LED displayer and expanding the using space of the outdoor raster sticking LED displayer. The invention includes a displaying module of the displayer, wherein the displaying module is strip shape displaying module and is arranged on a hollow upright post. A control circuit is arranged in the hollow upright post. The upper end and lower end of the upright post are provided with an upper end and a lower end. The left end and right end of the module strip are provided with a module positioning and locking device.

The invention discloses an end face contact charge-discharge electrical connector. An existing end face contact electrical connector can have the phenomenon of arc discharge. The end face contact charge-discharge electrical connector comprises a socket and a plug; the socket comprises a base, a floating plate, elastomers, a cover board, guide sleeves, tower springs and moving contact assemblies; the floating plate is arranged in a floating plate mounting cavity; one elastomer is arranged in one elastomer mounting cavity; each moving contact assembly comprises a moving contact insulator, a moving contact, a pressure spring and a shaft retaining ring; a flange part of each moving contact insulator is connected with the floating plate by a bolt; one end of each moving contact is provided with a pressure spring mounting shaft; each pressure spring mounting shaft passes through a moving contact mounting hole of the corresponding moving contact insulator; the plug comprises a mounting panel and fixed contact assemblies; each fixed contact assembly comprises a fixed contact, a fixed contact front insulator and a fixed contact rear insulator; each guide pillar on the plug extends into the corresponding guide sleeve of the socket. According to the invention, the displacement compensation function and the angle compensation function can be implemented, and the arc discharge risk is reduced.

The invention discloses an auxiliary device of a cable marker and relates to the field of cable markers. The auxiliary device of the cable marker comprises a bottom plate, the cable marker, moving blocks, driving parts, fixing plates, main shafts, wheel discs and first motors, wherein matching holes are formed in the positions, at one side of an inlet and one side of an outlet of the cable marker,of the bottom plate; the moving blocks are positioned in the matching holes, and the driving parts are in power connection with the moving blocks; the fixing plates are symmetrically arranged at theupper end faces of the moving blocks, and the upper end faces of the fixing plates are provided with shaft grooves; the wheel discs are detachably connected with the main shafts, the two ends of eachmain shaft are placed in the corresponding shaft grooves, and the wheel discs are used for winding a pipeline; and the first motors correspond to the moving blocks one by one, and the first motors arefixed on one of the fixing plates and used for driving the corresponding main shaft to rotate. When the cable marker starts to work, the driving parts enable a cable pipe to always coincide with thecentral axis where the inlet and the outlet of the cable marker are located, so that the included angle between the cable pipe and the central axis where the inlet and the outlet of the cable marker are located is eliminated, the friction force between the cable marker and the cable pipe is effectively reduced, and the cable pipe is prevented from being damaged due to the friction force.