30 results about "Arc duration" patented technology

An apparatus and technique are provided for generating a plasma using a power supply circuit and arc detection arrangement. The power supply circuit has a cathode enclosed in a chamber, and is adapted to generate a power-related parameter. The arc detection arrangement is communicatively coupled to the power supply circuit and adapted to assess the severity of arcing in the chamber by comparing the power-related parameter to at least one threshold. According to various implementations, arc occurrences, arcing duration, intensity and / or energy are measured responsive to comparing the power-related parameter to the at least one threshold. According to further implementations, the above-mentioned measured quantities are accumulated and / or further processed. An apparatus and method are also provided for detecting arc events when the current spikes above a threshold level. The method and apparatus is also for classifying the arc events based on the voltage and current signals and the duration each is beyond a threshold value.

The invention belongs to the technical field of detection and monitoring of traction power supply systems, and discloses a calibration device for pantograph-catenary arcing measurement sensors. Actual data to limit the working distance between the sensor to be calibrated and the light source for simulating the arc, based on the adjustment platform structure to realize the three-way adjustment of the pantograph-catenary arc sensor to be calibrated, and adjust the light transmission of different light sources through the rotating plate with a light hole Frequency, so as to calibrate the pantograph-catenary arcing duration, pantograph-catenary arcing times and pantograph-catenary arcing interval time measured by the pantograph-catenary arcing sensor in a way that is most close to the use environment. The calibration device can simultaneously calibrate multiple types of arc sensors, and simultaneously considers the influence of ambient interference light on the arc sensors. The invention also discloses a calibration method based on the pantograph-catenary arcing measurement sensor calibration device.

The disclosure provides a welding control method, a welding machine control device and a welding machine. The welding control method includes: after outputting the welding pulse, detecting whether a short circuit occurs within the current pulse period; when a short circuit is detected, obtaining the short circuit duration and the arcing duration; determining the filter according to the ratio of the short circuit duration to the arcing duration A voltage calculation method; according to the calculation method, the filter voltage of the welding pulse is calculated in real time, and when the filter voltage reaches a preset voltage, the next welding pulse is output. The embodiments of the present disclosure can avoid the problems of arc instability and arc length inconsistency caused by short circuit in the welding process.

The present invention provides a chip fuse and a method of manufacturing the chip fuse, and aims at improving the breaking performance such as maintaining the appearance and reducing the continuous arc. In the chip fuse (21), a heat storage layer (23) is formed on an insulating substrate (22), and surface electrode portions (24a) on both sides in the longitudinal direction of the chip fuse are formed on the heat storage layer. ) and the fuse element part (24b) between the above-mentioned surface electrode parts, and a protective film is formed on the fuse element part, wherein, on the heat storage layer in a manner surrounding the fuse element part A rectangular bank (27) is formed on the surface electrode portion, and a first protective film (28) is formed inside the bank. In addition, in the bank forming process, by affixing a sheet-shaped photosensitive group-containing material on the fuse element portion, the surface electrode portion, and the heat storage layer, and attaching the sheet-shaped photosensitive group-containing material Rectangular banks are formed by ultraviolet exposure and development (photolithography).

The invention is suitable for the technical field of electronic engineering, and provides a gunfire simulator. The gunfire simulator comprises a firing electrode set, a discharging electrode set, a firing circuit and an energy storage circuit, wherein the firing electrode set is located on the inner side of the discharging electrode set, the height of the firing electrode set is lower than that of the discharging electrode set, and the firing circuit comprises a high-voltage generation circuit and an arc duration circuit; and a first connection point of the high-voltage generation circuit is connected with a positive electrode of the firing electrode set and a first connection point of the arc duration circuit, a second connection point of the high-voltage generation circuit is connected with a negative electrode of the firing electrode set and a second connection point of the arc duration circuit, a third connection point of the arc duration circuit is connected with a first connection point of the energy storage circuit, a fourth connection point of the arc duration circuit is connected with a second connection point of the energy storage circuit, a third connection point of the energy storage circuit is connected with a positive electrode of the discharging electrode set, and a fourth connection point of the energy storage circuit is connected with a negative electrode of the discharging electrode set. The gunfire simulator is small in size, light in weight and convenient to carry, and the problems that simulated gunfire in existing shooting training is low in sound level and distorted in sound quality are solved.

The invention relates to a low-voltage circuit breaker. The technical problem of long arc duration caused by the secondary electron emission of the conventional low-voltage circuit breaker is solved. The low-voltage circuit breaker comprises a shell, an arc extinguish chamber, a moving contact terminal and a fixed contact terminal, wherein the arc extinguish chamber, the fixed contact terminal and the moving contact terminal are arranged in the shell. The low-voltage circuit breaker is characterized by also comprising a contact terminal cover, wherein the contact terminal cover mainly comprising a base part and a gas production part connected with the base part; at least the gas production part is made from a gas production material; the gas production part is opposite to a spacing between the moving contact terminal and the fixed contact terminal; when the gas production part produces a gas, an arc enters the arc extinguish chamber; and moreover, the gas production part faces a moving contact on the moving contact terminal.