44results about How to "Avoid arc phenomenon" patented technology

The invention relates to a fuse, which is provided with a first casing and a second casing, wherein the first casing and the second casing are mutually combined, an accommodating chamber is formed between the first casing and the second casing, a disconnecting device is arranged between the first casing and the second casing and is provided with two electrodes and a fusing part, each electrode is provided with a first sheet body, a side sheet body and a second sheet body which are mutually connected so that the occurrence of fracture or poor contact condition of the electrodes in the use process is avoided, the fusing part is positioned in the accommodating chamber and can be completely disconnected through the accommodating chamber, the occurrence of the electric arc phenomenon is avoided, and the use safety is ensured.

The invention provides a waterproof safety socket and plug capable of preventing a child from an electric shock. The safety socket is provided with an insulation shell, an insulation rotating core, a movable clamping pin, a spring and a power supply clamp protrusion; the safety plug is provided with an insulator, a two-pole or three-pole electrode, a wire and a wire steering device. The outside of the lower end of the positive pole and the outside of the lower end of the negative pole are respectively and symmetrically provided with a clamping groove, the clamping grooves can be plane grooves or hook-shaped grooves and can be closely fit with the power supply clamp protrusion, a power supply in the socket is hidden in a sealed mode when the socket and the plug are separated through rotation of the insulation rotating core, the situation that an electric shock accident occurs when a finger of the child or a conductor is inserted into the power supply is avoided, an electric arc phenomenon is avoided due to the fact that the power supply is completely sealed during work, the upper end convex edge of the insulation shell is connected with an upper end cover edge of the insulation rotating core in a sleeved mode in the longitudinal direction, the situation that liquid enters the power supply and accordingly short-circuited phenomena or electricity leaking accidents occur is avoided, the wire of the safety plug can be adjusted at 180 degrees, and an ideal effect integrating safety, practicability and compatibility is scientifically achieved.

The invention discloses a pre-polarization coil current control system for low-field nuclear paramagnetic resonance and a control method thereof. The control system comprises a power supply, a pre-polarization coil, a charging protection circuit, a bootstrap circuit and a bridge type symmetrical driving circuit, wherein the charging protection circuit and the bootstrap circuit are connected in series and form a loop with the power supply; the bridge type symmetrical driving circuit comprises four IGBT switch tubes connected in parallel with a capacitor; the four IGBT switch tubes form a symmetrical full-bridge structure so as to realize the switching-on and switching-off of current of the pre-polarization coil; and the pre-polarization coil is connected among the four IGBT switch tubes. When the bridge type symmetrical driving circuit is switched off, the self inductance current of the pre-polarization coil charges the capacitor group, so that the capacitor group generates the potential much higher than the power supply voltage and exerts the potential onto the pre-polarization coil, so that the current drop speed of the pre-polarization coil is continuously accelerated; and the fast switching-off of the current of the pre-polarization coil is realized.

The embodiment of the invention provides a communication method and a communication device in order to solve a problem of an arc phenomenon generated when a charging line is pulled out. The communication method comprises the steps of obtaining the transmission time length of a target message to be transmitted, wherein the target message includes data transmitted when a charging device charges a terminal; if the transmission time length is greater than or equal to a preset time length, dividing the target message into M data blocks, wherein the transmission time length of each data block in theM data blocks is less than the preset time length, and M is a positive integer; and sequentially transmitting the data blocks according to a target time interval.

The invention discloses a lamp group and its insulation protective jacket mounted on the back light module unit, wherein, the lamp group includes a lampshade, a lining, at least two lamp tubes and an insulation protective jacket, the lining is installed in the lampshade, and trepan borings are provided at the side edge of the lining for the electrode ends of the two lamp tubes to insert in the lining, the insulation protective jacket is provided with a main body and at least a binding hole, the main body is made from transparent material, the binding hole perforates the main body, the bindinghole of the insulation protective jacket is in mutual binding to at least one lamp tube, and the main body coats the electrode end of the lamp tube expose the lining. d in the bush outside the extreme power.

The invention discloses a fixed contact comprising a hollow cylindrical cylinder body, wherein the inner wall thickness of the cylinder body is increased from top to bottom in a stepped mode; the inner and the external sides of the upper edge of the cylinder body are provided with chamfers; and the bottom end part of the cylinder body is provided with a mounting hole communicated with the inner cavity of the cylinder body. The invention has the advantages that the structure is reasonable; the fixed contact is suitable for a circuit with low rated current and a circuit with high rated current;and the arc phenomenon between the fixed contact and a moving contact can be effectively prevented to enhance the safety of the circuits and prolong the service life.