6results about How to "Arcing suppression" patented technology

The invention discloses an electric arc dynamic suppression method for hot plugging of an electric meter connector, relates to the technical field of electric energy metering equipment, and aims to solve the problems of electric arc generation, overproof metering error and the like caused by passive protection and lack of dynamic cooperative control in the prior art. The core of the method is that gap distance and power grid voltage phase signals are acquired in real time through a microcontroller, and the plugging speed, the signal injection and the position fine adjustment are dynamically regulated and controlled in three stages of pre-contact, low-current transition and full connection; and a machine learning model is combined to optimize a parameter threshold value, a redundancy safety mechanism and a multi-phase electric meter cooperative control strategy, so that double management and control of arc peak energy and metering errors are realized. The method can actively inhibit arc generation, avoid connector ablation and insulation deterioration, guarantee metering continuity and accuracy, adapt to complex power grid and environment working conditions, and meet the precision requirement of the intelligent electric meter.

The present invention provides a battery pack comprising: a battery pack housing; a cell assembly including a frame disposed on the battery pack housing and battery cells housed in the frame; a mounting block disposed between the frame and the battery pack housing; and a first bolt securing the frame to the mounting block and spaced apart from the battery pack housing, wherein the mounting block includes an insulating layer disposed in a portion contacting the frame and a portion contacting the battery pack housing.

This invention discloses a soft-switching control circuit and method for a power conversion device, electrically connected to both the power conversion device and an AC power supply. It includes a first relay and a second relay, with the power conversion device electrically connected to the AC power supply sequentially via either the first relay and the second relay or sequentially via the second relay and the first relay. The two ends of the second relay are connected in parallel to the two pins of a thyristor. The invention also includes a controller electrically connected to the first relay, the second relay, and the thyristor. The beneficial effect is that it ensures that both series-connected relays are in a zero-current or near-zero-current state at the instant of closing and opening. This fundamentally eliminates the huge surge current and arc erosion and impact on the contacts caused by traditional switching methods.

The invention discloses an electric aircraft power battery compartment system and a cooperative control method thereof. The system comprises a battery module, an airtight shell and helium, wherein the airtight shell wraps the battery module to form a main sealing cavity, and the cavity is filled with the helium. The system is also provided with an emergency gas film layer and an arc extinguishing nozzle array which are respectively connected with a helium source through a control valve. The control unit controls helium to be maintained at a first pressure in a normal state according to monitoring data of the sensor module so as to provide buoyancy compensation and gas spring vibration isolation at the same time; when the impact condition is met, helium is injected into the emergency gas film layer for boosting so as to form impact-resistant buffering; when the short-circuit condition is satisfied, helium is released from the nozzle for arc suppression. According to the invention, buoyancy weight reduction, vibration isolation, impact buffering and electrical safety protection are integrated.

The invention belongs to the technical field of power supply management, and particularly provides an alternating current and direct current power supply isolated output switching device, which comprises a power supply input and preprocessing module used for accessing an alternating current main power supply and a direct current standby power supply and performing preprocessing protection on the two power supplies respectively; the power supply detection and control module is used for acquiring electrical parameters of the alternating-current main power supply and the direct-current standby power supply in real time, judging a power supply state of the power supply according to an acquisition result and outputting a control signal; the relay isolation switching module comprises two relays respectively corresponding to the main power supply branch and the standby power supply branch, and realizes physical isolation and automatic switching of the AC / DC power supply based on the control signal; the output adaptation and protection module is used for providing a corresponding output branch according to the load type and protecting an output power supply; wherein the two relays adopt an interlocking design to ensure that the two relays are not conducted at the same time.

The utility model discloses a multilayer gradient type arc-resistant grading ring, and relates to the technical field of grading rings. Comprising a first grading ring, a second grading ring is arranged above the first grading ring, a third grading ring is arranged above the second grading ring, connecting devices are clamped to the outer walls of the first grading ring, the second grading ring and the third grading ring, fixing devices are clamped to the outer walls of the connecting devices, and mounting buckles are lapped to the outer walls of the connecting devices; the multi-layer gradient diameter design is matched with the electric field distribution characteristics of the high-voltage equipment, and the potential difference is balanced layer by layer from a top strong electric field area to a lower weak electric field area, so that the local electric field intensity is reduced, arc discharge is inhibited, and concentrated discharge is avoided; the transportation difficulty and the occupied space are reduced, and the installation process is simplified through the modes of clamping, bolt fixing and the like in combination with the pre-assembly function of the elastic piece and the limiting device during installation.