76results about How to "Adjustment time" patented technology

The invention discloses a current-sharing circuit for high-power parallel IGBT modules. The circuit comprises a controller and a plurality of current-sharing control branches connected in parallel, wherein each current-sharing control branch comprises a first current detection circuit, a second current detection circuit, a first drive circuit, a second drive circuit and a transformer T; the firstcurrent detection circuits and the second current detection circuits are used for detecting output current of the first IGB module and the second IGBT module separately to obtain two paths of detection current transmitted to the controller; the controller generates two paths of control signals according to the magnitudes of the two paths of detection current; the two paths of control signals are driven through the first drive circuits and the second drive circuits separately and then transmitted to the transformers T; and the transformers T synchronously output the two paths of control signalsto grids of the first IGBT module and the second IGBT module. According to the current-sharing circuit, the problem of imbalance of static current-sharing in a conducting state and dynamic current-sharing in a switching state is solved while the cost of a control driver is not greatly increased.

The invention relates to a wireless channel access scheme which is characterized in that a hidden / display receiving terminal waits according to the time information of RTS or CTS frame in a node pair of the communication when the hidden / display receiving terminal and a deaf transmitting node appear in the nodes of a network because of competing for channels and relays the transmitting time; when an NAV calculagraph of the hidden / display receiving terminal is 0 and the hidden / display receiving terminal detects that the channel is idle, the hidden / display receiving terminal transmits a CCS control frame to the corresponding deaf transmitting node and informs the deaf transmitting node for immediate communication; and the deaf transmitting node determines that the channel of the receiving end is idle and carries out communication immediately after receiving the CCS control frame. In the invention, the new control frame CCS is introduced on the basis of IEEE802.11DCF, the time for the node to access to the channel can be effectively adjusted, the blindness of channel access caused by inconsistent state information of the channel of the receiving nodes and transmitting nodes is reduced, the probability of conflict packet loss is reduced, and the network throughput and the fairness between flows are enhanced.

The invention discloses a high-voltage power transmission line foreign matter cleaning robot and a high-voltage power transmission line foreign matter cleaning method, and aims to solve the problem offoreign matter accumulation on a power transmission line. The high-voltage power transmission line foreign matter cleaning robot comprises: a cleaning unit, wherein the cleaning unit comprises a first half cylinder and a second half cylinder which are hinged, fixing plates are fixed to the first half cylinder and the second half cylinder, a first bolt assembly is arranged between the two fixing plates, when the two fixing plates make contact, the first half cylinder and the second half cylinder define a complete cylinder, crushing teeth are arranged on the inner wall of the first half cylinder and the inner wall of the second half cylinder, and a swing ball is connected to the outer wall of the first half cylinder through a lifting rope; a driving unit, wherein the driving unit comprisesa pair of driving half shells, walking wheels rotationally mounted on the inner walls of the driving half shells and a driving mechanism for driving the walking wheels to rotate, wherein mounting plates are fixed to the end faces of the first half cylinder and the second half cylinder, and positioning mechanisms are arranged on the side walls of the driving half shells; and a pull rope fixedly connected with the swing ball. With the robot and the method, the foreign matter on a power transmission line can be efficiently removed.

The invention discloses a photoelectric angle measuring device, which relates to the technical field of measuring instruments and solves the problem of low measurement accuracy of an object's inclination angle in the prior art. A laser emitter is provided, and an illuminance meter located on the laser path emitted by the laser emitter is provided. A filter that can rotate around its own axis is arranged on the laser path between the laser emitter and the illuminance meter. The laser path and the filter The surface is vertical, and the light transmittance of each part of the filter is different. The filter is fixed in the accommodation chamber through the bracket, and the edge of the filter is provided with a counterweight. The accommodation chamber is also equipped with a microprocessor and a power module. A display screen is arranged outside the chamber, and the illuminance meter, the power supply module, and the display screen are respectively electrically connected to the microprocessor. The invention uses electronic technology to calculate the inclination angle of the object, and has the advantage of high measurement accuracy.

The invention relates to a lubricant pump unit (P) for lubricating the cylinders in precise time with the cycle in internal combustion engines (M) such as diesel engines. Said pump unit contains a working piston (22), which drives several metering pistons (25) that are allocated to lubricating point connections and can be driven back and forth in feed and return cycles by means of a working stroke that can be adjusted to meter the supply of lubricating oil, a magnetically actuated control valve (V) being provided in a control oil circuit of the working piston. The working piston (22) is subjected in turn to a hydraulic pressure both in the feed cycle and the return cycle by the control oil circuit.

The invention relates to the technical field of food machining devices, in particular to a slicing device used for making dried kiwi. The slicing device comprises a screening machine, a peeling device, a cleaning device and a slicing device body; the inlet end of a peeling pipeline is connected with a discharging opening of the screening machine, the peeling device comprises the peeling pipeline which is placed in an inclined manner and is of a hollow interlayer structure, the peeling pipeline comprises a first interlayer and a peeling blade, the first interlayer is provided with a steam inletand a steam exhaust hole, the cleaning device comprises a conveying device and a washing device, the conveying device is located at the outlet end of the peeling pipeline, and the washing device is used for washing kiwi fruits on the conveying device, and the slicing device body is used for slicing the peeled kiwi fruits. According to the kiwi fruit peeling device, through steam, the surfaces ofthe kiwi fruits are instantly cured to achieve peeling, and slicing can be achieved.