33 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.

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.

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 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 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.

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.

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 invention provides a hybrid solid-state circuit breaker, and relates to the technical field of electrical equipment. The hybrid solid-state circuit breaker comprises a mechanical switch module, a power switch module and an energy taking module. The power switch module and the mechanical switch module are arranged in parallel, the energy taking module is electrically connected with the power switch module, the energy taking module is used for absorbing electric arc energy generated by the mechanical switch module in the fault breaking process and converting the electric arc energy into a control signal, and the control signal is used for controlling the power switch module to be switched on. Therefore, the hybrid solid-state circuit breaker is simple in structure, the reliability is improved, and the electrical safety and the maintenance convenience of a power utilization system are also improved.

A circuit breaker network includes a solid-state circuit breaker (SSCB), one or more circuit breakers, and a current limiting control circuit of the SSCB. The current limiting control circuit is programmed to determine a first time period for keeping the SSCB in an on state, determine a second time period for keeping the SSCB in an off state, and switch, cyclically, the SSCB to the off state for the second time period and then to the on state for the first time period to control the fault current within a predetermined band-to-band range that is below the first current threshold and above the second current threshold for a fault clearance duration.

The application provides a hybrid solid-state circuit breaker and a control method thereof, and relates to the technical field of electrical appliances.The hybrid solid-state circuit breaker comprises a first conductive path, a second conductive path, a protection branch and an energy consumption branch.A first mechanical switch is connected in series on the first conductive path.The second conductive path is connected in parallel with the first conductive path, and a second mechanical switch and an electronic switch are connected in series on the second conductive path.The protection branch is connected in parallel with the electronic switch, and a thermal fuse is connected in series on the protection branch.The energy consumption branch is connected in parallel with the electronic switch, and a thermal protection element and an energy consumption unit are connected in series on the energy consumption branch.It should be noted that the action temperature rise threshold of the thermal protection element is lower than the failure critical temperature of the energy consumption unit.Thus, the hybrid solid-state circuit breaker provided by the application effectively isolates and protects the energy consumption unit from thermal overload failure while ensuring the complete realization of the breaking function, thereby significantly improving the long-term reliability and safety under repeated operation and high-energy fault conditions.

The invention discloses a direct-current solid-state circuit breaker, a direct-current load and an electrically-driven remote-control submersible, belongs to the field of direct-current power systems, and aims to form a relatively high off-state resistance value through the off-state of a plurality of controllable sub-switches connected in series and to form a relatively high off-state resistance value through a voltage-sharing circuit arranged between the control ends of the adjacent controllable sub-switches. And negative bias voltage can be generated between'control ends and second ends' of the adjacent controllable sub-switches at the rear stage when the adjacent controllable sub-switches at the front stage are disconnected, so that a first switch module comprising a plurality of cascaded controllable sub-switches and voltage equalizing circuits in one-to-one correspondence with the controllable sub-switches is arranged; the driving module sends the driving voltage to the control ends of the controllable sub-switches of the first sequence in the first switch module when the circuit breaking requirement exists, so that the controllable sub-switches in the first switch module can be turned off, namely, the direct-current solid-state circuit breaker not only has high voltage endurance capability, but also is simple in driving mode.

The application relates to a high-integration power module applied to an electronic solid-state circuit breaker, which comprises a shell, an IMS substrate arranged in the shell, a first DC+ terminal and a second DC+ terminal, bidirectional current conduction and blocking are realized by reversely connecting two groups of sic chips in series, the utilization rate of the space in the shell and the heat dissipation performance are better by adopting the whole IMS substrate, the equivalent resistance of the current sensor is reduced by connecting two parallel current sensors in series in the loop, current detection is met, and the efficiency of the whole system is improved; the above design is comprehensive, the power module can realize the parallel connection of 12 sic chips at most when adopting Econodual3 packaging, the shell is filled with epoxy resin, the epoxy resin and the IMS substrate have similar thermal expansion coefficients, the system has higher thermal stability and reliability, TVS tubes are also connected in parallel on the circuit, high-precision and rapid voltage clamping is realized, sic chips are protected under high voltage in the system instantaneous shutdown, and the requirements of the electronic solid-state circuit breaker on low on-state loss, high heat dissipation capacity, high reliability and long electrical life are met.

A solid-state circuit breaker (SSCB) module includes a module housing comprising a heatsink and having a plurality of fins extending therefrom configured to dissipate heat; and a circuit breaker circuit comprising at least one semiconductor switch connected in parallel to at least one voltage clamping element, such as, for example, at least one transient voltage suppression (TVS) diode and / or at least one metal oxide varistor (MOV), the circuit breaker circuit being integrated inside the module housing.

This invention discloses a solid-state circuit breaker with isolation function, including a base, an operating mechanism, a rotating shaft assembly, a stationary contact assembly, a moving contact assembly, a silicon carbide module, and a terminal block. The base has an open front and contains, from top to bottom, an upper cavity, a mechanism groove, a middle cavity, and a lower groove. The operating mechanism is installed in the mechanism groove, and the rotating shaft assembly is linked to it. The stationary contact assembly is fixed in the upper cavity. The moving contact assembly is installed on the rotating shaft assembly. The silicon carbide module is located in the middle cavity. The terminal block is placed in the lower groove. This invention, through a layered cavity design within the base, compactly arranges the components, significantly reducing the product size. The silicon carbide module is horizontally placed to form a compact layout with the contact system. The circuit board is stacked and mounted on a step. The microswitch is directly triggered by a lever, requiring no auxiliary parts. It has the advantages of small size, high integration, reliable isolation, and easy replacement of traditional circuit breakers.

The application relates to the technical field of electrical equipment, in particular to a high-voltage fast switch matched with a solid-state circuit breaker, which comprises a circuit breaker body, multiple sets of disconnectors, a first knob for controlling the on-off of the circuit breaker body, multiple sets of second knobs for controlling the disconnectors, a first control mechanism and a second control mechanism, the first knob forms moving interference on the second knobs in an open state through the first control mechanism, the first control mechanism removes the moving interference on the second knobs in a closed state, and when the first knob and one or more sets of the second knobs are in the closed state, the first control mechanism and the second control mechanism can form moving interference on the second knobs when the first knob is opened, and can form interference on the first knob when the first knob and one or more sets of the second knobs are closed, so that the situation that the disconnectors are pulled together under load and the equipment is damaged or a safety accident occurs is avoided.

The present application relates to the technical fields of energy storage system battery cluster level protection and control, more specifically, the present application relates to a kind of energy storage cluster controller integrated with SSCB, including main control module, data acquisition module, communication module and main circuit, main circuit is equipped with B+, B- and P+, P-, fuse Fuse and current detection unit HA are connected in series at B+ side, and solid-state circuit breaker SSCB is used to replace charge-discharge contactor and parallel diode network.The SSCB includes Kz, Kcd, Kp and the pre-charge / limiting branch formed by Rp, and the buffer branch formed by Rc and Cp.Main control module realizes two-stage pre-charge input based on current I and voltage parameters, and realizes energy controlled release through adaptive threshold Ix1 / Ix2 and soft shutdown control, reduces input impact and shutdown overvoltage;At the same time, in the diagnostic mode, Kp-Rp small current channel is used to carry out online self-checking and health assessment on Kz / Kp / Kcd, Rp and Rc / Cp, and report through CAN.

The application belongs to the field of new energy vehicle electronic control, and particularly relates to a bidirectional desaturation detection circuit for over-current fault protection of a solid-state circuit breaker, which comprises: symmetrically and parallelly arranged first and second voltage detection circuits, the first voltage detection circuit comprising a first high-voltage blocking diode D s1 , a first current-limiting resistor R s1 and a constant current source, the second voltage detection circuit comprising a second high-voltage blocking diode D s2 , a second current-limiting resistor R s2 and a constant current source, and the first and second voltage detection circuits are respectively provided with first and second low-voltage blocking diodes D blo1 and D blo2 second low-voltage blocking diodes for avoiding mutual interference between the outputs of the voltage detection circuits and realizing a shared fault determination circuit, the structure of the above symmetrically parallel design and shared fault determination circuit can ensure the consistency of over-current detection in two directions and reduce the difficulty of circuit debugging on the basis of reducing the hardware size and cost of the protection circuit.

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.

The present disclosure provides a solid-state circuit breaker including a mounting side plate; an operating handle disposed on the mounting side plate and being rotatable relative to the mounting side plate to switch between a closing state and an opening state; a mechanical switch connected to the operating handle, wherein in a case that the operating handle is rotated by a first angle from the closing state along a rotation direction of the operating handle switched from the closing state to the opening state, the operating handle drives the mechanical switch to open; an actuating assembly disposed on the mounting side plate, wherein an end of the actuating assembly abuts against the operating handle, and the actuating assembly is rotatable relative to the mounting side plate under driving of the operating handle; and a microswitch abutting against the other end of the actuating assembly away from the operating handle, wherein in a case that the operating handle is rotated by a second angle from the closing state along the rotation direction of the operating handle switched from the closing state to the opening state, the operating handle drives the actuating assembly to rotate, and the microswitch is triggered by the actuating assembly, and the first angle is greater than the second angle.

A power protection system includes a first DC power source, a first load, a first power bus connecting the first power source and the first load, and a first solid state circuit breaker circuit integrated in the first power bus. The first solid state circuit breaker circuit includes a first semiconductor switch, a first capacitor arranged between the high side voltage rail and the low side voltage rail closer to the power source or to the load than the semiconductor switch, and a first inductor located such that current generated by the first capacitor when unloading in case of a short circuit at the power source or at the load passes the first inductor. The controller is configured to measure a voltage change over the first inductor and trigger an actuation signal for the first semiconductor switch if a voltage change surpasses a predetermined threshold voltage.

The application belongs to the field of new energy vehicle electronic control, and particularly relates to a solid-state circuit breaker bidirectional multistage desaturation protection circuit based on multiple diode modulation, which comprises multiple parallelly connected and identically structured grading detection branches, at least a first grading detection branch and a second grading detection branch; the bidirectional multistage desaturation protection circuit realizes grading of protection delay time under different fault currents. For an overcurrent fault with a fast rising speed of fault current, a higher fault detection threshold current and a very short protection delay time are set, so that the fault can be quickly identified and the solid-state circuit breaker can quickly cut off the fault current. For an overload fault with a longer duration but a smaller fault current, multiple lower fault detection threshold currents and longer protection delay times can be set according to the overload bearing capacity of the specific solid-state circuit breaker and the protected load, so as to improve the ability of the solid-state circuit breaker to pass through the overload current under the premise of ensuring safe operation of the solid-state circuit breaker.

Disclosed is a solid-state circuit breaker including an electronic switch; a mechanical switch configured to complete a turn-on process and a turn-off process by manual operation; a sensor configured to generate a trigger signal depending on a position of the mechanical switch during the turn-on process or the turn-off process; a control unit configured to activate a boosting mechanism according to the trigger signal; and the boosting mechanism configured to provide a boost for the turn-on process or the turn-off process; Wherein the electronic switch is connected in series with the mechanical switch.

The application belongs to the field of solid-state circuit breakers, and specifically discloses a solid-state circuit breaker based on a tetrode and a control method thereof. The application uses a tetrode as a core switching device to replace a traditional voltage-controlled device. The application has a low on-state voltage drop, directly reducing the normal conduction loss. At the same time, the bipolar conduction mechanism and the tetrode structure bring high robustness, and the positive temperature coefficient characteristic can realize automatic current equalization when multiple tubes are connected in parallel, fundamentally improving the system stability. In addition, the manufacturing process of the device is relatively simple, and has potential cost advantages. In the system, the monitoring and control module realizes rapid fault detection and accurate shutdown, and the buffer energy absorption module effectively suppresses the opening overvoltage, protecting the safety of the device. Through the advantages of the device itself and the system cooperation, the scheme maintains the fast breaking capacity, and realizes lower loss, higher stability and better overall cost.

Systems / methods for controlling current flow in a solid-state circuit breaker uses a MOSFET based linear slope gate driver. The gate driver can be configured to generate a gate voltage signal that has a constant or linear slope. The linear slope of the gate voltage signal, when applied to a semiconductor switch, causes a substantially constant current to flow in either direction through the semiconductor switch. The constant current flow may then be used to power on one or more loads in a manner that is easier to control and manage compared to a variable current flow. In some embodiments, the gate driver generates the linear slope gate voltage signal by using a plurality of discrete voltage steps that resemble a set of stairs to simulate or approximate a straight line slope. This allows the slope of the voltage signal to be defined by selecting the horizontal and vertical increments of the voltage steps.

A solid state circuit breaker structure and electronic switching circuit is provided. The solid state circuit breaker structure includes a power substrate, a power die, a plurality of bond wires, and a magnetic body. The power die is mounted on the power substrate. The bond wires extend outwardly from the power die. The magnetic body is attached to the power substrate and disposed to increase a magnetic field produced by a current flowing through the bond wires and thereby produce a first inductance that produces a decrease in an overvoltage at turn off of the power die.