51results about How to "Improve lightning resistance" patented technology

A solid state power controller (SSPC) often contains electronic circuitry which could be damaged or upset by the excessive transient voltages induced by the lightning and SSPC could result in undesirable (or nuisance) trips due to lightning strikes. The present invention is intended to address the “nuisance trip” issue, by relying on the lightning indicative signals to distinguish between the transient current surge due to the lightning strike and that due to the circuit fault in the power distribution channel. The present invention utilizes either the break-down current in a transient voltage suppression (TVS) device, or a voltage signal at the output of the SSPC as the indication of lightning strike, to avoid nuisance trips.

A same-time-sequence multi-pulse lightning protection box comprises a lightning protection module, a sampling circuit, a detection circuit, and a display panel connected in sequence. The sampling circuit comprises an EMC strong electromagnetism suppression circuit, a signal acquisition circuit, and a strong electromagnetism isolation and suppression circuit. When a low-voltage power supply circuit is impacted by a lightning electromagnetic pulse, a lightning overvoltage signal is generated on the low-voltage power supply circuit and is applied to the lightning protection module. The lightning protection module transmits one path of the lightning overvoltage signal to the EMC strong electromagnetism suppression circuit, and another path of the lightning overvoltage signal is connected to a PE end, so that lightning is conducted into the ground. The EMC strong electromagnetism suppression circuit limits the rising gradient and amplitude of the generated lightning overvoltage signal and transmits the processed signal to the signal acquisition circuit. The signal acquisition circuit acquires the signal and transmits the acquired signal to the strong electromagnetism isolation and suppression circuit. The strong electromagnetism isolation and suppression circuit isolates the signal, and transmits the processed signal to the detection circuit and the display circuit panel, so that man-machine information exchange is implemented.

The invention discloses an isolated transmission circuit and an isolated encoder system, which are used to solve the problem of sewing machine failure in thunderstorm season. The isolated transmission circuit includes a high-speed optocoupler module, which is used to isolate and transmit the first signal and the second signal of the photoelectric encoder to the DSP main control unit; a low-speed optocoupler module, which is used to isolate and transmit the third signal of the photoelectric encoder to the DSP main control unit. The isolated encoder system includes: an isolated multi-channel power supply, a photoelectric encoder, an isolated transmission circuit and a DSP main control unit, which are used to collect and calculate signals sent by the photoelectric encoder in real time. The present invention adopts a fully isolated manner to improve the anti-lightning strike performance of the controller of the sewing machine and reduce the failure probability of the sewing machine.

A shielding connection structure for an outdoor power socket includes a shell, one end of the shell is provided with a flange, the shell is symmetrically provided with a protruding bow-shaped cantilever on the end face on the same side as the flange, and the bow-shaped cantilever is provided. The upper casing has a lantern-shaped elastic spring coil, and a conductive component for power transmission is inserted in the limit position in the casing. The part of the conductive component extending out of the casing cooperates with the arcuate cantilever to support the The elastic spring coil completes the shielded electrical connection between the outer casing and the interface of the inner hole of the external cabinet through extrusion deformation during installation. By designing the shielding connection at the interface position of the inner hole of the cabinet, the invention avoids the traditional structure of shielding connection design at the flange of the shell, and the disadvantage of poor performance due to the influence of the sealing ring and the anti-corrosion coating; the flange and the elastic spring ring The design of the double shielding connection structure improves the reliability of the product and can improve the shielding efficiency and lightning resistance performance.

The invention relates to a lightning stroke-resistant optical fibre composite overhead ground wire, which comprises aluminium-covered steel wires and an optical unit by taking a stainless steel tube as a sleeve, wherein the optical unit comprises an optical fibre; the optical fibre is in the stainless steel tube; the aluminium-covered steel wires and the optical unit form a layered stranded structure; the aluminium-covered steel wires comprise first aluminium-covered steel wires, second aluminium-covered steel wires and third aluminium-covered steel wires; the layered stranded structure comprises a central layer, a first layer and a second layer; the first aluminium-covered steel wires are in the central line; the first layer is composed of the second aluminium-covered steel wires and the optical unit; and the second layer has eleven third aluminium-covered steel wires. The lightning stroke-resistant optical fibre composite overhead ground wire disclosed by the invention is mainly used for constructing an optical fibre communication network of a power system and has the functions, such as lightning protection, flow division, optical fibre communication and the like, at the same time; furthermore, the lightning stroke-resistant optical fibre composite overhead ground wire has good lightning stroke-resistant performance and can be applied to areas with high thunderstorm.

The invention discloses a connector, which comprises: an outer shell, the front end of which is suitable for locking onto a connection seat; an inner shell, accommodated in the outer shell; a cable extending into the inner shell; and an electronic A module is electrically connected to the conductor core of the cable. The cable includes an outer shield surrounding and electrically isolated from the conductor core, the outer shield being adapted to be electrically connected to the connector socket. The cable also includes an inner shield positioned between and electrically isolated from the conductor core and the outer shield, the inner shield adapted to be electrically connected to the Metal housing for electronic modules. In the present invention, the inner shielding layer of the cable can be grounded through the metal shell of the electronic module, and the outer shielding layer of the cable can be grounded through the connection seat, thereby effectively improving the lightning resistance performance of the entire connector and improving the outdoor use safety of the connector performance.