7results about How to "Reduce self-heating" patented technology

The invention discloses a test circuit. The test circuit comprises a first auxiliary device and a second auxiliary device, the first auxiliary device has a first end coupled to the power supply voltage end and a second end coupled to the test connection end. The second auxiliary device has a first end coupled to the test connection end and a second end coupled to the ground. The first auxiliary device may be connected in parallel to the first device under test, and the second auxiliary device may be connected in parallel to the second device under test. And the first auxiliary device is kept in a conducting state when the first to-be-tested device conducts the conducting action. And the second auxiliary device is kept in a conducting state when the second to-be-tested device conducts the conducting action. According to the test circuit provided by the invention, zero-voltage on-off of the to-be-tested device is realized, the switching loss of the to-be-tested device is reduced, and spontaneous heating of the to-be-tested device is reduced, so that the test environment of the to-be-tested device meets the requirements.

The utility model provides a novel tandem type water-cooled resonant capacitor, comprising capacitor cores and copper electrodes, the upper and lower end faces of the capacitor cores are respectively welded with one copper electrode, the whole capacitor cores are cylindrical, the number of the capacitor cores is two, and the capacitor cores comprise a first copper foil, a second copper foil, a polypropylene optical film and a metallized polypropylene film. The first copper foil and the second copper foil are used as extraction electrodes, the metallized layer of the metallized polypropylene film is used as an intermediate electrode, the two layers of electrodes are separated by the metallized film, a polypropylene medium is arranged in a gap between the first copper foil and the second copper foil, and the capacitor core is formed by winding the copper foil, the polypropylene optical film and the metallized polypropylene film around the hard core rod. Spraying metal layers at two ends, welding the core and the copper electrodes together by using low-temperature soldering tin, and encapsulating a sealing material around the core; the copper electrode is provided with six water through holes, and the six holes are communicated through a connecting pipe to conduct internal water circulation. The power output and reliability of the capacitor are greatly improved, and the service life of the capacitor is greatly prolonged.

The present invention discloses a method and device for adaptively controlling the temperature of a liquid crystal display screen for a special vehicle, the method comprising obtaining the resistance encountered on the heat flow path of components; performing thermal simulation on the operation of the liquid crystal display screen according to the arrangement position of the vehicle-mounted liquid crystal display screen in the vehicle to obtain a thermal simulation data model of the operation of the liquid crystal display screen, obtaining the maximum stable operating temperature of the liquid crystal display screen components and bringing the thermal simulation data model into the thermal simulation data model to obtain the thermal simulation results of the operation of the liquid crystal display screen; obtaining a temperature range in which the liquid crystal display screen cannot operate at all according to the thermal simulation results of the operation of the liquid crystal display screen; adaptively adjusting the brightness of the liquid crystal display screen according to the temperature range in which the liquid crystal display screen cannot operate at all, so as to realize the normal display function of the liquid crystal display screen in full-time and full-domain scenarios; carrying out a thermal balance test of the scheme in high temperature and high cold extreme temperature scenarios on the vehicle to verify the accuracy of the scheme; the present invention can realize the monitoring and protection of the full-time and full-domain liquid crystal display screen temperature control system.

The application is suitable for the technical field of lightning arrester detection, and particularly relates to a lightning arrester detection method and a durable lightning arrester. The method comprises the following steps: acquiring a reference voltage and a reference current; acquiring first detection information in response to a first detection operation; determining an equivalent voltage based on the first detection information, the reference voltage and the reference current, performing a second detection operation based on the equivalent voltage, and acquiring second detection information; and determining maintenance information based on the second detection information. The lightning arrester detection method provided by the application can improve the temperature aging of the lightning arrester and improve the prediction accuracy of the maintenance cycle of the lightning arrester.

The application discloses a chip test probe, which comprises a chip probe, a needle tube and a temperature change inlay core. The needle tube with the built-in spiral spring is located in a needle sleeve, the tail of the needle head is located in the needle tube, the head of the needle head extends out of the needle tube, the tail of the needle head has a hollow wide-mouth tube with a diameter larger than the needle head, the hollow wide-mouth tube is composed of a plurality of strip petals arranged at intervals in the circumferential direction, a plurality of the strip petals enclose a storage cavity, and a line groove is arranged between the adjacent strip petals; the temperature change inlay core is embedded in the storage cavity of the hollow wide-mouth tube, one end of the spiral spring is in contact with the temperature change inlay core, and the other end is in contact with the tail of the needle tube. The chip test probe improves the sensitivity and accuracy of the detection signal, avoids the risk of electric spark, improves the safety hidden danger, further improves the stability of the detection data, and improves the consistency and comparability of the data.

The utility model provides a secondary battery, which comprises a shell provided with an opening end; the top cover is provided with at least one inward concave groove, the top cover covers the open end of the shell, the shell and the top cover are enclosed to form an accommodating space, and the accommodating space is used for accommodating a naked battery cell; the number of the pole columns is two, the pole columns are respectively arranged at the positions of the grooves in the surface of the top cover, and the horizontal distance between the two pole columns is 0-600mm; according to the utility model, the conductive terminals of the battery are recessed inwards to improve the space utilization rate of the battery, and the resistance is reduced by reducing the current passing path, namely the internal resistance is reduced to reduce the self heat release of the battery so as to reduce the temperature rise of the battery.

The utility model discloses a food processing machine to solve the technical problems that an existing food processing machine is low in smashing efficiency and large in noise. The food processor comprises a cup body, a cutter and a brushless motor. Wherein the cup body is provided with a processing cavity; the cutter is arranged at the bottom of the processing cavity; two opposite sides of the blade are respectively provided with a first cutting edge and a second cutting edge; the brushless motor is arranged at the bottom of the cup body and is connected with the cutter; the brushless motor has the functions of driving the cutter to rotate and immediately switching the rotating direction; under the condition that the cutter rotates around the first rotating direction, the first cutting edge can coarsely crush food materials in the processing cavity; and under the condition that the cutter is switched to rotate in the second rotating direction, the second cutting edge can finely crush the food materials in the processing cavity, and the rotating speed of the first cutting edge or the second cutting edge driven by the brushless motor ranges from 3000 rpm to 12000 rpm. Therefore, the crushing device has the advantages of being good in crushing fineness, high in crushing efficiency and low in crushing noise.