95 results about "Solid state circuit breaker" patented technology

This invention discloses a wind-cooled multi-channel solid-state circuit breaker cabinet, comprising a cabinet body and a wind-cooling heat dissipation system. The cabinet interior is divided layer by layer from front to back by longitudinal beams into an isolation zone, a first component mounting zone, a heat dissipation zone, and a second component mounting zone. The wind-cooling heat dissipation system includes air inlets at the bottom of the front and rear doors and air outlets at the top, as well as a heat dissipation structure located within the heat dissipation zone. The heat dissipation structure includes a radiator duct and optional fan assemblies, which can be flexibly configured according to power switching components with different thermal powers to achieve precise and efficient heat dissipation. Each electrical channel has an independent control panel corresponding to the front door, integrating a display screen, indicator lights, and buttons, supporting independent on / off control of multiple circuits. This invention, through reasonable functional zoning and air duct design, solves the problems of low heat dissipation efficiency and poor multi-circuit adaptability in existing technologies, and has the advantages of high heat dissipation efficiency, reasonable layout, convenient operation and maintenance, and good protection.

A system includes any number of solid-state circuit breakers that couple between a power supply and an electrical load. The system also includes a housing and the solid-state circuit breakers are disposed within the housing. The housing includes a door sensor that generates a first signal indicative of a position of a door of the housing. The housing also includes an indicator that generates a second signal indicative of a position of a handle of the housing. The system also includes a secondary device communicatively coupled to the solid-state circuit breakers, the door sensor, and the indicator. The secondary device receives the first signal and the second signal and generates an instruction to adjust an operating state of the solid-state circuit breakers based on the first signal and the second signal.

The utility model relates to a solid-state circuit breaker which is characterized by comprising a current detection circuit which is configured to detect a current signal in the circuit and output a detection signal; and the current limiting circuit is connected to the current detection circuit and is configured to generate a first control signal for controlling the turn-off of the solid-state circuit breaker according to the detection signal so as to limit the current in the circuit. The current limiting circuit is configured to trip instantly after the current in the line exceeds a set threshold value, so that the damage of excessive short-circuit current to a solid-state device, namely an MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) can be avoided, and meanwhile, a cable can also be protected. And the MCU microprocessor is configured to process and analyze the detection signal representing the current in the circuit, and give a tripping command to break the circuit when a tripping condition is met.

According to the short-circuit protection method and system based on the low-voltage alternating-current solid-state circuit breaker, whether the current rise rate exceeds a given threshold value or not is detected, and the short-circuit fault can be quickly removed while the circuit breaker effectively avoids surge current by utilizing the microsecond-level short-circuit fault cutting-off capability of the solid-state circuit breaker, so that the short-circuit protection effect is improved. The function of rapidly and accurately removing the short-circuit fault of the ship power system is achieved. According to the method, the current rise rate is detected while the current is detected, so that the surge current and the short-circuit current are distinguished, short-circuit protection is prevented from being started by mistake, and the problem that a solid-state circuit breaker in a ship low-voltage alternating-current power system recognizes the surge current as a short-circuit fault, and consequently misoperation is caused is effectively solved. The method can give full play to the microsecond-level short-circuit fault removal capability of the solid-state circuit breaker, and facilitates the selective protection design of multistage nodes of a power distribution system.

The invention provides a semiconductor package and a solid state circuit breaker including the same. A semiconductor package may include: a package substrate provided with a plurality of pins connected to the outside, the plurality of pins including a drain pin, a source pin, a Kelvin pin, and a gate pin; a first die; a second die spaced apart from the first die in the first direction; and a multilayer conductive connection structure on the package substrate and including a first conductive pattern and a second conductive pattern over and partially overlapping the first conductive pattern, in which the first die and the second die are connected in parallel, the gate electrodes of the first die and the second die are electrically connected to the gate pin via one of the first conductive pattern and the second conductive pattern, the Kelvin electrode of the first die is electrically connected to the Kelvin pin, and the Kelvin electrode of the second die is electrically connected to the Kelvin pin via the other of the first conductive pattern and the second conductive pattern.

The invention discloses a fault isolation and self-healing control method for a multi-terminal flexible direct current power supply system in the field of flexible direct current power supply, and aims to solve the technical problems that a traditional multi-terminal flexible direct current system is lagged in fault positioning, low in isolation speed, not timely in self-healing response and low in power supply recovery precision. According to the method, through a closed-loop control logic of fault feature extraction, accurate positioning, rapid isolation and dynamic self-healing, a fault identification model is constructed based on collaborative features of transient current and voltage, and millisecond-level positioning of a fault section is realized in combination with a simplified fault positioning formula; an IGBT series solid-state circuit breaker is adopted to realize rapid fault isolation, a self-healing scheduling strategy of load priority and resource adaptability is introduced, and power supply is recovered through cooperative scheduling of a distributed power supply and an energy storage unit. The fault isolation time is shortened, the power supply recovery success rate is improved, the voltage recovery deviation is reduced, and the power supply reliability and the operation toughness of the multi-terminal flexible direct current power supply system are remarkably improved.

The invention discloses an I-type modularized direct-current solid-state circuit breaker, which relates to the technical field of direct-current solid-state circuit breakers and comprises four horizontal bridge arms, namely an FBSM1, an FBSM2, an FBSM3 and an FBSM4, a vertical bridge arm group, and four inductors, namely an L1, an L2, an L3 and an L4. According to the circuit breaker, the removal time of monopole grounding and interelectrode short circuit faults is short and far faster than that of a traditional circuit breaker, and the impact of fault current on equipment can be greatly reduced. Differentiation module control is adopted for different faults, power supply of the other pole is not affected when the faults are removed, and the system reliability is improved. When inter-electrode short circuit occurs, forward voltage is inserted into the full-bridge sub-module to enable the voltage of a short-circuit point to be close to zero, reverse discharge of a capacitor is limited, fault current is cleared at the first zero crossing point of current, fault expansion is avoided, and the problems that an existing traditional solid-state circuit breaker is insufficient in single-pole grounding fault processing capacity, influences system power supply reliability, is single in function and the like are solved.

Solid-state circuit breakers (SSCBs) have been witnessing an impressive progress with the aid of wide bandgap (WBG) devices such as silicon carbide (SiC) MOSFETs. Along with obtaining high efficiency as the result of low on-state resistance, response times have been gaining remarkable achievements in microseconds range. Not only that, the reported successes in control and gate drivers design and incorporating fault detection / location techniques in SSCBs are promising. A MOV-resistive capacitive switch (MOV-RCS) snubber for solid state circuit breakers addresses the following: 1) the MOV degradation issue in DCCBs is solved, 2) the maximum allowable DC bus voltage on DCCBs is extended. The solid state circuit breaker and an active clamping snubber includes a first circuit including a fault current bypass based solid state breaker for low voltage direct current systems.

The application discloses a plug-in modular solid-state circuit breaker, and belongs to the technical field of circuit breakers, which comprises a main loop circuit board, a main loop circuit board mounting seat, an insulating surface cover, a control loop circuit board, a control loop circuit board mounting seat, a plurality of conductive columns, a shunt and an insulating mounting base; wherein the main loop circuit board is arranged in the mounting cavity of the main loop circuit board mounting seat; the insulating surface cover is arranged in the mounting cavity of the main loop circuit board mounting seat, thereby forming a first module; one end of the plurality of conductive columns is electrically connected with the wiring terminal of the insulating mounting base; the shunt is welded with one of the conductive columns; the control loop circuit board is fixedly arranged in the mounting cavity of the control loop circuit board mounting seat, and is integrally fixed to the insulating mounting base, thereby forming a second module; and the first module is inserted into the second module. The plug-in modular solid-state circuit breaker solves the inconvenient maintenance and assembly problem of the traditional solid-state circuit breaker caused by the fact that the traditional solid-state circuit breaker is designed as an integral structure which is difficult to disassemble and assemble.

Disclosed herein are aspects for detecting and responding to over-current conditions in a solid-state circuit breaker (SSCB) system. An example aspect for a solid-state circuit breaker system includes a shunt resistor (205) to generate a voltage proportional to a current flowing through a circuit, a plurality of fault detection units (203), an OR gate (206) to receive timer output signals from the plurality of fault detection units (203) and generate a fault detection signal, and an SR latch (207) having a set input to receive the fault detection signal from the OR gate (206), the SR latch (207) configured to provide a control signal to a gate driver of a solid-state switch based on the fault detection signal. Each fault detection unit can include a digital-to analog (DAC) converter to set a threshold voltage, a comparator (204) to compare voltages, and a timer to validate a fault condition and generate the timer output signals.

The application discloses a kind of modular parallel solid-state circuit breaker current sharing control device and method, multiple solid-state circuit breakers are parallel, and current balance between solid-state circuit breaker is realized based on current sharing control technology.The current of n solid-state circuit breakers is detected in real time, the actual current of the first n-1 solid-state circuit breakers is closed-loop regulated using closed-loop control technology, corresponding drive control signal correction is generated, and then the equivalent on-resistance of solid-state circuit breaker is adjusted by drive control signal, so that the actual current of n-1 solid-state circuit breakers is equal to average current.The drive control signal correction of the first n-1 solid-state circuit breakers is summed and inverted, and used as the drive control signal correction of the nth solid-state circuit breaker, so that the overall average equivalent resistance remains unchanged.The application realizes the modular combination of solid-state circuit breaker, and only one specification of solid-state circuit breaker can meet the needs of circuit breaker of different current levels, with great application prospect.

The present disclosure relates to a solid state circuit breaker, comprising: a semiconductor switch unit including a semiconductor switch that electrically connects or disconnects a power system and a load according to a voltage applied to a gate terminal; and a control unit that, when the semiconductor circuit breaker is turned on, controls the semiconductor switch to repeat turn-on and turn-off operations for a predetermined initial driving time so as to gradually alleviate the magnitude of inrush current caused by an initial connection between the power system and the load.

The invention relates to a solid state circuit breaker comprising an electronic switch, a mechanical switch configured to complete a closing process and an opening process by manual operation, a sensor configured to generate a trigger signal depending on a position of the mechanical switch during the closing process or the opening process, a control unit configured to activate an assistance mechanism depending on the trigger signal, and the assistance mechanism configured for providing assistance for the closing process or the opening process, wherein the electronic switch is connected in series with the mechanical switch.

A device includes an electro-mechanical switching device having an open-circuit and closed-circuit conditions and a path of least resistance having a path input and a path output with the switching device between the input and the output. The device includes a bypass power switch device that comprises a solid-state circuit interrupter and that is configured to conduct current between the input and the output in response to an open-circuit condition of the switching device. The device includes a current sensor that is connected to the output and configured to detect a fault current event. The device includes an actuator that is coupled to the switching device and a controller that is configured to generate a trigger signal to activate the actuator to cause the open-circuit condition of the switching device and to interrupt the fault current event by the power switch device, based on the detected fault current event.

A circuit breaker (10) includes a current sensor (206) having a normal sensor output and an overcurrent detection output, a solid state switch module (202) configured to have a closed state that allows current to flow through the circuit breaker and an open state that interrupts current flow through the circuit breaker, a gate driver (204) configured to control the solid state switch module including a desaturation function output, wherein the gate driver is configured to cause the solid state switch module to interrupt current flow through the circuit breaker when the desaturation function output becomes an on state, and an electronic trip circuit configured to output a trip signal to the gate driver when the normal sensor output reaches a first threshold level or the overcurrent detection output becomes the on state.

The invention provides a driving and protecting unit for a solid-state circuit breaker and a solid-state circuit breaking device. The driving and protecting unit comprises a driving module which is configured to be used for driving the solid-state circuit breaker to be switched on and switched off; the temperature sensor is configured to sense the working temperature of the solid-state circuit breaker and output a first voltage indicating the working temperature, and a threshold value of the first voltage corresponds to an over-temperature protection threshold value of the solid-state circuit breaker; the voltage conversion circuit is configured to convert the first voltage into a second voltage and enable a threshold value of the second voltage to be equal to an overcurrent protection threshold value of the solid-state circuit breaker; and a comparison module configured to compare the second voltage and a third voltage indicating a current of a current loop to be protected by the solid state circuit breaker with a threshold value of the third voltage, and provide a comparison result to the driving module; wherein the threshold value of the third voltage corresponds to the over-current protection threshold value, and the driving module drives the solid-state circuit breaker to be switched off based on the comparison result.

A bidirectional DC solid-state circuit breaker with dual-sided self-powered power supply includes a bidirectional solid-state switch, a DC / DC converter, and an energy absorption circuit, the energy absorption circuit including a capacitor. C Varistors (MOVs), Diodes D 1. D 2 and grounding resistance R The source of SiC power switch J1 in the bidirectional solid-state switch is connected to the power supply side, and the source of SiC power switch J2 is connected to the line side after passing through the detection unit; capacitor C One end is connected to the drain of SiC power switching transistors J1 and J2, and the other end is pulled down to ground by a resistor. R ; Varistor MOV and capacitor C Parallel connection; diode D 1. D 2. Using a common anode configuration in anti-series connection, diodes D 1. D The cathodes of transistors 2 are connected to the sources of SiC power switches J1 and J2, respectively; the input of the DC / DC converter is connected to the capacitor. C The two ends are connected, and the DC / DC converter will connect the capacitor. C The voltage on the circuit is stepped down and isolated to power the detection unit, control unit, and drive unit; the drive unit controls the turn-off of SiC power switches J1 and J2. This invention enables flexible dual-side power supply and uninterrupted self-powering.

Systems / methods for controlling current flow in a solid-state circuit breaker uses a MOSFET based semiconductor switch. Unlike conventional semiconductor switches that use a discrete damping resistor to suppress current oscillations, the semiconductor switch herein uses an additional transistor to induce a damping resistance. The use of a transistor to create a damping resistance allows the damping resistance to be deployed temporarily, on an as-needed basis. In some embodiments, the damping resistance is created by causing a voltage differential to arise across the current flow terminals of the additional transistor. This may be achieved by turning on the additional transistor sequentially, after a predefined time delay, rather than simultaneously with the main transistor of the semiconductor switch. The voltage differential may then be removed to remove the damping resistance when the damping resistance is no longer needed.

The utility model relates to a solid-state circuit breaker, which is characterized by comprising an input end connected to an anode and a cathode of a power supply; the isolating switch is connected in series in the main loop and is connected to the positive pole of the power supply; the power electronic switch is connected in series in the main loop and is connected in series with the isolating switch; and a controller configured to receive an input voltage of the power supply, a voltage to ground of a positive electrode of the power supply, and a downstream resistance to ground value of the downstream resistance to ground of the downstream resistance to ground, and control whether to disable the power electronic switch. Therefore, upstream insulation impedance abnormity can be recognized in advance, whether the electronic power switch is forbidden or not is controlled, the cost is low, and potential safety hazards can be avoided.

This application relates to a multi-SiC chip parallel unidirectional and bidirectional DC solid-state circuit breaker and its manufacturing method, belonging to the field of power electronics technology. The circuit breaker includes a copper substrate, a ceramic backing plate, a power switching unit composed of parallel SiC chips, a Shunt current sensing resistor integrated on the backing plate, and a package housing. By arranging multiple SiC chips in parallel, the overall on-resistance is reduced, and the current carrying capacity is improved. Simultaneously, the integrated current sensing function enables precise protection control. This application can solve the problems of high on-resistance and limited current carrying capacity of traditional protection devices, meeting the performance requirements of high-voltage, high-current DC systems for protection devices.

A power module for a solid-state circuit breaker, including: first and second substrates; first and second terminals; and a chip assembly disposed between the first and second substrates. The chip assembly includes: a plurality of bottom-side transistors having drains electrically coupled to a first substrate and including first and second sets of bottom-side transistors; a plurality of top-side transistors having drains electrically coupled to a second substrate and including first and second sets of top-side transistors; a gate drive board including bottom-side and top-side metal layers; and first and second metal connectors disposed on opposite sides of the gate drive board, the first metal connector being electrically coupled to sources of the first set of bottom-side transistors and the first set of top-side transistors, the second metal connector being electrically coupled to sources of the second set of bottom-side transistors and the second set of top-side transistors.

The invention provides a bidirectional solid-state circuit breaker module which comprises a first sub-module and a second sub-module, the first sub-module comprises a first part, and the second sub-module comprises a second part. At least the first part of the first sub-module and at least the second part of the second sub-module have the same configuration and are symmetrically arranged relative to each other. Each of the first part and the second part comprises a substrate and at least two power semiconductors and at least one energy absorption element which are arranged on the substrate, and the at least one energy absorption element is arranged in the middle of the substrate; the at least two power semiconductors are arranged around the at least one energy absorbing element.

The embodiment of the invention provides an energy storage system protection device and an energy storage system. The device comprises at least one protection module and at least one first fuse. The protection module comprises a first solid-state circuit breaker and a second fuse which are connected in series; the protection module is connected in series among the plurality of battery packs, and the first solid-state circuit breaker is used for detecting state data of the energy storage system and is disconnected when the state data meets a first disconnection condition; the second fuse is used for fusing when the state data reach the fusing parameter of the second fuse; the fusing parameter of the second fuse is configured to be associated with the tolerance parameter of the first solid-state circuit breaker; the first fuse is connected in series between the battery pack and the load and is used for fusing when the state data satisfies the fusing parameter of the first fuse. By using the protection module comprising the solid-state circuit breaker and the fuse, the quick response capability of the solid-state circuit breaker and the stability of the fuse are fully combined, so that the energy storage system protection device can realize quick response on the basis of high reliability.

The invention relates to the field of direct-current power distribution facilities, in particular to a miniaturized direct-current solid-state circuit breaker which comprises a power switch and current path layer, a driving detection and control layer and a communication and interface layer which are sequentially stacked and packaged in the vertical direction to form a laminated compression structure, and an integrated heat dissipation system penetrating through the laminated compression structure. The power switch and current path layer comprises a semiconductor power switch device adopting a SiC MOSFET and a detection element, the semiconductor power switch device and the detection element are adjacent to each other and connected with the thick copper wire, a piezoresistor is integrated on the semiconductor power switch device and the detection element to serve as an overvoltage protection element, and a substrate of the power switch and current path layer is made of high-thermal-conductivity ceramic. According to the invention, the power switch and current path layer, the driving detection and control layer and the communication and interface layer are arranged to be of a vertical laminated compression structure, and circuit components which are traditionally arranged in a planar discrete manner are stacked and integrated in a vertical space, so that the planar occupied area is reduced, the equipment volume is reduced, and the miniaturization of the circuit breaker is realized.

According to an embodiment of the present disclosure, there is provided a power module for a solid state circuit breaker, comprising: first and second substrates; first and second terminals; the chip assembly is arranged between the first substrate and the second substrate. The chip assembly includes: a plurality of bottom side transistors, drains of which are electrically coupled to the first substrate, including first and second sets of bottom side transistors; a plurality of top side transistors having drains electrically coupled to the second substrate, including first and second sets of top side transistors; a gate driver board including bottom and top metal layers disposed on opposing surfaces of the driver board insulating layer, the bottom metal layer electrically coupled to a gate of the bottom transistor, and the top metal layer electrically coupled to a gate of the top transistor; and first and second metal connections disposed on opposite sides of the gate driver board, the first metal connections electrically coupled to sources of the first set of bottom side transistors and the first set of top side transistors, and the second metal connections electrically coupled to sources of the second set of bottom side transistors and the second set of top side transistors.

The present invention provides a DC system protection apparatus with a communication resetting function, which includes at least one load, at least one DC power supply system, a DC solid-state circuit breaker, a current sensor, a reset / break controller and a reset communication module. The at least one DC power supply system is connected to the at least one load. The DC solid-state circuit breaker is connected in series with the at least one load and the at least one DC power supply system. The current sensor is connected in series with the DC solid-state circuit breaker, the at least one load and the at least one DC power supply system. The reset / break controller is connected to the current sensor, and controls breaking and resetting of the DC solid-state circuit breaker. The reset communication module is connected to the reset / break controller.

A solid-state circuit breaker includes an input, an output, a solid-state switch, a protection circuit, and a control circuit. The input is configured to connect to a source. The output is configured to couple with at least a first load via a first electromechanical breaker and a second load via a second electromechanical breaker. The solid-state switch selectively couples the input with the output. The protection circuit is configured to open the solid-state switch in response to the fault current exceeding an overcurrent protection threshold. The control circuit is configured to determine whether an electrical fault is present, and in response to determining that the fault is present, operate the solid-state switch in a pulse conduction mode during the fault to current-limit the fault current to less than the overcurrent protection threshold and enable one of the first and second electromechanical breakers to trip and isolate the fault.

The invention discloses a bidirectional Gamma-Z source solid-state circuit breaker parameter design method based on a time domain. The method comprises the following steps of: 1, establishing a function relationship among power supply voltage, output current, load resistance, fault resistance, equivalent output resistance and coupling inductance value; 2, solving an analytical expression of the output current; 3, deriving an expression of current reflected to the thyristor and an analytical expression of current flowing through the thyristor; 4, calculating the current zero-crossing time of the thyristor and the output current at the moment; 5, deriving an expression of voltages at the two ends of the thyristor, and calculating the time when the thyristor bears the reverse bias voltage; step 6, deriving a capacitance value analytical expression of the capacitor in an ideal short circuit state; and step 7, determining impedance network parameters based on an optimal design target.

The application discloses an AC solid-state circuit breaker adaptive turn-off method and system, the core of the method is to construct a two-dimensional phase space geometric evolution manifold according to the current amplitude sequence of the fault current and the hardware differential rate signal, realize geometric extrapolation of the short-circuit current peak value containing the non-periodic component through the trajectory curvature characteristics; combined with the cumulative equivalent operation times, the radiator temperature and the standing time and other physical state parameters, input them into the endogenous physical information neural network model, define the safe operation interval with physical certainty by using the hard-coded embedded Cauer thermal network operator; and in the interval, an analytical projection algorithm based on stress cost manifold is adopted to execute constant level optimization of the optimal turn-off time by using the control barrier function. The application can effectively solve the distortion problem of the traditional model under the magnetic saturation working condition and the uncertainty of the soft constraint prediction, while ensuring the breaking reliability, significantly reducing the online calculation complexity.

The application relates to the technical field of circuit monitoring, in particular to a smart sensing knowledge identification method for circuit faults of a semiconductor hybrid solid-state circuit breaker; the fluctuation abnormal moment is obtained according to the amplitude feature and the duration feature of current fluctuation in a current time sequence curve; the suspected current abnormal moment is obtained according to the difference feature of the fluctuation abnormal degree of the same moment in history; the different clustering clusters are obtained by clustering the current features and the fluctuation features of all suspected current abnormal moments in the current time sequence curve; the current abnormal degree of the clustering cluster is obtained according to the number feature of the suspected current abnormal moment in the clustering cluster and the distance feature in the clustering space; the current abnormal moment is obtained according to the current abnormal degree; the fault feature value is obtained according to the distribution feature of the current abnormal moment in the current time sequence curve and the change feature of the current abnormal degree, and circuit fault identification is carried out, so that the stability of the circuit breaker work is improved.