160results about "Explosion operated switches" patented technology

The invention provides an active and passive integrated protection intelligent fuse with a single excitation source. The active and passive integrated protection intelligent fuse comprises a first conducting bar, a signal melt, a second conducting bar, a circuit board and an excitation source, the circuit board is provided with the relay and the excitation source. The relay is connected with an external control unit, the excitation source, the first conducting bar and the second conducting bar. The first conducting bar, the signal melt and the second conducting bar are connected in sequence; an isolating layer is arranged on the relay, and the isolating layer is used for shielding crosstalk of external voltage on the relay; after a plurality of pins of the relay are welded on the circuit board, an insulation processing mode is adopted among the plurality of pins; and in an inspection working condition, the external control unit outputs a first inspection signal to the relay so as to control the relay to be switched into an inspection state, and feeds back the working state of the excitation source to the external control unit.

The invention belongs to the field of fuses, and provides an intelligent fuse which comprises a conductor used for bearing main loop current; the fuse body is connected in the conductor in series and can be fused when the current of the main loop exceeds a preset threshold value; a first cutting unit configured to cut off the melt based on an external trigger signal; and a second cutting unit configured to cut off the conductor based on an internal trigger signal, where the internal trigger signal is a voltage signal across the melt. The intelligent fuse solves the technical problems that an intelligent fuse in the prior art is complex in structure and high in cost, and is low in cost, small in size, simple in structure and easy to operate.

A battery power disconnect apparatus is disclosed. According to one aspect of the present invention, the battery power-off device comprises: a lower case including an installation space, the upper part of which is open and which is formed along a longitudinal direction, i.e., a first axial direction, and a storage space, the upper part of which is open and which is formed along a longitudinal direction, i.e., a second axial direction; the electronic device includes an installation space, a storage space formed to be separated from the installation space by a partition wall and adjacent to the installation space in a second axial direction, a plurality of relays individually installed in the installation space, a circuit board installed in the storage space through an open upper portion of the storage space, and a control unit installed in the storage space. A lower case including an external connection terminal for electrically connecting to the outside, and an upper case coupled to the lower case so as to be able to cover an open upper portion of the mounting space and an open upper portion of the receiving space; the circuit board is installed in the accommodating space and is configured to be perpendicular to the bottom surface of the accommodating space.

A contactor device is provided that includes a movable contact configured to selectively open / close an electrical circuit. The movable contact is coupled to the shaft, and the shaft is retained in the closed position by the latch. The movable member is biased away from the latch. During an event, a biasing force that biases the movable member away from the latch is overcome. The movable member disengages the latch from the shaft, allowing the shaft to move to the open position. In an example, a movable member is disposed over an opening of a housing of the contactor device.

The utility model relates to the field of circuit protection and contactors, in particular to an integrated motion type excitation integrated contactor which comprises a movable contact bridge, a static contact, a movable iron core, a static iron core, a movable guide rod, an excitation ignition assembly, a piston, an auxiliary contact assembly and at least one melt, and the melt is connected with the auxiliary contact assembly in series. The two ends of the auxiliary contact assembly and the melt which are connected in series are conductively connected with a static contact of the contactor, in the initial position, the auxiliary contact assembly is arranged in an insulated mode, and the melt and the static contact are not conducted; the excitation ignition assembly acts according to a received trigger signal and drives the piston to displace, the piston drives the static iron core, the movable iron core and the movable guide rod to displace, so that the auxiliary contact assembly is switched on, and after the melt is connected into a main loop in a parallel connection mode and a contact system of the contactor is driven to be switched off, the melt is disconnected in a mechanical mode. Under the normal function of the contactor, the power consumption of the contactor during normal work is reduced, and the breaking capacity of the contactor is improved.

The application provides a single excitation source active and passive integrated protection intelligent fuse, which comprises a first conductive row, a signal fuse body, a second conductive row, a circuit board and an excitation source; the circuit board is provided with the relay and the excitation source, the relay is connected with an external control unit, the excitation source, the first conductive row and the second conductive row respectively; the first conductive row, the signal fuse body and the second conductive row are connected in sequence; the relay is provided with an isolation layer, the isolation layer is used for shielding crosstalk of external voltage to the relay; after a plurality of pins of the relay are welded on the circuit board, the plurality of pins are treated by an insulation treatment mode; in a patrol working condition, the external control unit outputs a first patrol signal to the relay, so as to control the relay to switch to a patrol state, and feedback the working state of the excitation source to the external control unit.

The application relates to the field of switch design, in particular to a pyrotechnic switch. The pyrotechnic switch comprises a shell, a busbar body and at least one detonation cut-off assembly, and further comprises a temperature rise cut-off assembly and a control chip for cutting off the busbar body, the detonation cut-off assembly comprises a detonation cutter and a detonator, the detonation cutter is an insulator, and the detonator generates an impact force to cut off the busbar when detonated; the temperature rise cut-off assembly comprises a temperature rise cutter and a temperature rise deformation piece, the temperature rise cutter is a conductor, and the temperature rise deformation piece is used for deforming to drive the temperature rise cutter to cut off the busbar when the temperature rises; and the control chip is used for receiving an overvoltage signal generated when the temperature rise cutter cuts off the busbar and detonating the detonator. When the circuit current is overloaded, the temperature in the switch rises, the temperature rise deformation piece deforms to push the temperature rise cutter to cut off the busbar body. The overvoltage generated in the cutting-off process detonates the detonator, an impact force generated by the detonator pushes the detonation cutter to cut off the busbar body, and the self-triggering of the pyrotechnic switch is realized.

This application discloses a circuit breaking apparatus and a photovoltaic power generation system, and relates to the photovoltaic energy storage field. When it is detected that a current on a circuit between two power devices connected in series to the circuit breaking apparatus is greater than a preset threshold, in this application, both two switch transistors in a drive circuit of the circuit breaking apparatus are controlled to be turned on. In this case, a large current is input to a breaking switch circuit of the circuit breaking apparatus to control the breaking switch circuit to break the circuit, so that the circuit breaking apparatus cuts off a fault current, to prevent fault spreading and ensure that the circuit is not damaged. In addition, because the circuit breaking apparatus is a "suicide" protection circuit, the drive circuit uses a design of the two switch transistors, and a direct current power supply inputs the large current to the breaking switch circuit only when both the two switch transistors are turned on, and the large current cannot be supplied when any one of the switch transistors is turned on. This helps avoid mistakenly triggering generation of the large current, and can ensure a trusted action of the drive circuit.

Mobile applications with a combined breaker and relay can include a power distribution unit, a current source circuit, and a voltage determination circuit. A combined breaker and relay can be configured to interrupt a motive power circuit for an electrical vehicle system. A combined breaker and relay can include a plurality of fixed contacts, a plurality of movable contacts, a plurality of amateurs, and a current response circuit.

The invention relates to a separating device (3) for cutting off a load current path (4) between two busbars in the event of a fault, comprising: a separating element (21); a pyrotechnic unit (28); a safety device (25); an electrically insulating housing (7); contact elements (5, 6), which form contact points for contacting the respective busbars and of which the second end sections facing each other form electrical contacts (8) for guiding a load current path, the first contact element being at least partially in the form of a hollow cylinder and forming a guide cylinder (20) for the separating element, and the second contact element being arranged in the form of a hollow cylinder. A separating element accelerated in the guide cylinder by the pyrotechnic unit (28) is designed to disconnect the first contact element, to bridge a disconnection (34) of the first contact element in order to take over the load current path (4), and to guide the taken-over load current path by means of a safety device. The invention also relates to an assembly and to a high-voltage on-board electrical system.

Disconnecting device (30, 30') for a battery comprising several interconnected battery cells (21, 22, 23, 24) and a first and a second power supply connection (18, 19), wherein the disconnecting device (30, 30') comprises a disconnecting element (31), in particular a pyrotechnic disconnecting element (31), with which the battery cells (21, 22, 23, 24) or a part thereof can be disconnected from at least one power supply connection (18, 19) in the event of a short circuit, and wherein the disconnecting device (30, 30') further comprises a passive current- or voltage-controlled release circuit (32) which is connected in parallel to one or more battery cells (21, 22, 23, 24), wherein the release circuit (32) is a current-controlled release circuit and the release element (321) is an RC circuit (C1, R11, R12) with a capacitor (C1) serving as a current source, which is connected in series with at least one series resistor (R11, R12),wherein the triggering circuit (32) further comprises an ignition circuit (33) connected in parallel to a triggering element, which is adapted to trigger upon a predefined voltage drop in one or more of the battery cells (21, 22, 23, 24) and to close the current path to the pyrotechnic isolating element (31), and the ignition circuit (33) comprises at least a fuse resistor (R2) and a thyristor (T1), characterized in that the triggering circuit (32) is a current-controlled triggering circuit and the fuse resistor (R2) is smaller than a series resistor (R11, R12).

To provide an electrical switching device capable of minimizing or preventing high pressure breach or rapture of a switching device housing.SOLUTION: An electrical switching device includes: a hermetically sealed housing 102; internal components which are within the hermetically sealed housing, and configured to change the state of the switching device from a closed state and an open state in response to input, the closed state allowing current flow through the device, the open state interrupting current flow through the device; and contact structures electrically connected to the internal components for connection to an external circuit. The housing includes a pressure relief mechanism to allow pressure inside the housing to escape from the housing.SELECTED DRAWING: Figure 1

The purpose of the technology of the present disclosure is to provide a technology for preventing cracks from occurring in a projectile or in a projectile target. This sliding structure comprises: a housing that contains a housing space extending in one direction; an igniter that is provided to the housing; a projectile that is disposed in the housing space, that is launched from one end side of the housing space by means of energy received from the igniter, and that slides along the extension direction of the housing space; and a buffer material that is provided to a terminal end regulation part for regulating the sliding terminus position of the projectile.

The invention discloses a hexogen-driven rapid protection closing switch and a closing method, and belongs to the technical field of special switches, the rapid protection closing switch is connected in parallel in a main loop of a superconducting magnet power supply system, and comprises a breaking structure unit and an auxiliary structure unit; the breaking structure unit comprises a hexogen grain, an insulating impact ring and an impact contact; during normal operation, the breaking structure unit and the auxiliary structure unit are in a breaking state; when a switching-on signal is received, the hexogen explosive column is detonated to push the insulating impact ring and the impact contact, the impact contact is embedded into the auxiliary structure unit, the breaking structure unit and the auxiliary structure unit form an effective path, the switching-on action is completed, and the switch structure is protected. According to the invention, by using a chemical energetic hexogen detonation closing structure, a conductive loop can be rapidly and reliably closed and through-flow, and the superconducting magnet can be prevented from being damaged. The contact surface of the closing switch contact adopts triangular concave-convex groove contact, so that the contact resistance after closing is reduced, and the through-current capability is improved.

The present invention relates to an on-board electrical system (200), wherein the on-board electrical system (200) comprises an electrical energy source (201), a first electrical component interface (235), a first electrical current path (221) for electrically connecting the at least one electrical energy source (201) with the first electrical component interface (236), and a second electrical current path (222) for electrically connecting the at least one electrical energy source (201) with the second electrical component interface (236), wherein the first electrical current path (221) and the second electrical current path (222) are jointly formed at least in a first current path section (220).In the first current path section (220) a switching device (250) with a switching input (251) and a switching output (252) is arranged, wherein the switching output (252) is electrically connected to at least one first electrical component interface (235), wherein at least one electrical current path (221) is electrically designed to be fuse-free between the at least one switching output (252) of the switching device (250) and the first component interface (235).

The invention relates to a contactor (38) configured to occupy open and closed states, comprising at least one actuator (44) configured to at least switch and / or maintain the contactor (38) in the closed state upon receipt of a closing signal, as well as a protection system (48) configured to occupy a first state in which the protection system (48) allows the contactor (38) to switch between the open and closed states, as well as a second state, upon receipt of a protection signal, in which the protection system (48) irremediably maintains the contactor (38) in the open state. Integrating the protection function into the contactor (38) tends to limit the mass of an electrical installation comprising at least one such contactor (38). The invention also relates to an electrical installation comprising such a contactor (38) and to an aircraft comprising such an electrical installation.

This application provides a power conversion apparatus (00) and a short-circuit protection method thereof, and a photovoltaic power generation system, and belongs to the field of power electronics technologies. The power conversion apparatus (00) includes an inverter (01), a sampling circuit (02), a controller (03), and a first pyrofuse (04) connected between the inverter (01) and a load (20). The sampling circuit (02) can sample a bus voltage between a positive bus and a negative bus that are connected to a direct current input end of the inverter (01), and an alternating current at an alternating current output end of the inverter (01). The controller (03) can reliably determine, based on a low bus voltage or a large alternating current, that a short-circuit fault occurs in the power conversion apparatus. Therefore, fault detection efficiency is high. In addition, when the short-circuit fault occurs in the power conversion apparatus (00), the controller (03) can further control the first pyrofuse (04) to be blown, to quickly disconnect the inverter (01) from the load (20). In this way, a large current generated due to a short circuit can be quickly prevented from flowing into the load (20) and damaging the load (20), thereby implementing fast short-circuit protection, and further preventing the short-circuit fault from spreading, so that short-circuit protection effect is good.

A converter arm (50A) for a modular multilevel converter is described. The converter arm (50A) includes a plurality of series-connected submodules (521, 522, ..., 52n). Each submodule includes a plurality of semiconductor devices, each semiconductor device including at least a controllable semiconductor switch (S1, S2, ..., S4), an energy storage device (C), and first and second alternating current AC terminals (54, 56). At least one of the plurality of submodules is an active submodule (522, ..., 52n) and at least one of the plurality of submodules is a redundant submodule (521). Each redundant submodule (521) further includes an inserting switch (58) connected between the respective first and second AC terminals (54, 56). The inserting switch (58) includes a fast-acting circuit breaker adapted to be opened in response to a detected fault in an active submodule and a contactor.

The application relates to the technical field of fuses, and discloses a variable threshold integrated protection device, which comprises a shell, a cavity and an arc extinguishing chamber arranged in the shell, and a busbar arranged in the shell and located between the cavity and the arc extinguishing chamber; an exploder arranged in the cavity; a piston arranged in the cavity and located between the exploder and the busbar, the piston moving towards the busbar under the driving action of the exploder and breaking the busbar; a shunt arranged in the shell and connected with the busbar in series, the shunt being used for detecting a current signal passing through the busbar; and a controller arranged in the shell and connected with the shunt, the controller being used for monitoring the current signal and outputting a trigger signal to control the exploder to be electrified and exploded when the current signal is abnormal. The shunt and the controller are integrated in the shell, the active monitoring of the fault current and the active triggering of the cut-off current can be realized, and the circuit can be reliably and effectively protected.

A contactor device includes a movable contact configured to selectively open / close an electrical circuit. The movable contact is coupled to a shaft, and the shaft is retained by a latch in the closed position. A movable member is biased away from the latch. During an event, the biasing force biasing the movable member away from the latch is overcome. The movable member causes the latch to disengage the shaft, allowing the shaft to move to an open position. In examples, the movable member is disposed over an opening in a housing of the contactor device.

A battery disconnect apparatus is disclosed. The battery disconnect apparatus according to an aspect of the present invention may include: a lower case, of which the top portion is open and which includes mounting spaces arranged along a first axial direction, which is a lengthwise direction; a plurality of relays, each mounted in one of the mounting spaces; an upper case, which is coupled to the lower case so as to cover the open top portions of the mounting spaces and includes a plurality of upper mounting spaces at positions corresponding to the plurality of relays on an one-to-one basis; and a permanent magnet disposed in each of the plurality of upper mounting spaces to control an arc generated from the relays.

The present invention provides a switching electric appliance with a pyrotechnic excitation device, which includes a switching electric appliance body and a pyrotechnic excitation device. The switching electric appliance body includes a fixed fixed contact part and a movable movable contact part. The pyrotechnic excitation device is an independent modular structure, fixedly attached to the switching electric appliance body from the outside of the switching electric appliance body, and can ignite explosives according to the load status of the switching electric appliance body to generate an explosive impact force that pushes the movable contact part away from the fixed contact part, thereby assisting in the rapid cutoff of the switching electric appliance.