42 results about "Derating" patented technology

The invention relates to the technical field of active testing of circuit breakers, discloses an active testing method and system for a circuit breaker, and is used for solving the problem that an existing active testing method is difficult to realize self-adaptive adjustment of a threshold value. Time-frequency analysis is carried out on the contact speed signal to extract time domain and frequency domain features, and heat flow analysis of the thermopile array is combined to obtain a heat engine coupling feature vector; a thermo-electro-mechanical coupling dynamic graph with the sensors and the components as nodes and the reciprocal of thermal conductance as the edge weight is constructed, the structure is updated in real time, and node drift is predicted through a graph convolutional network; fusing the environment derating and the predicted drift amount to adaptively adjust a threshold value; extracting a thermoelectric coupling component of a contact speed fast change component and a heat flow refraction angle change rate, and generating a reversed polarity pulse compensation signal to suppress interference; time synchronization, closed-loop feedback of data and threshold adjustment results are realized through secondary alignment of IEEE1588 and the cloud, graph model node weight and threshold rules are dynamically updated, synchronization with equipment health degree is ensured, and accurate early warning and protection are realized.

The invention discloses a voltage regulation control method and system for an electric power regulator, and belongs to the technical field of voltage regulation, and the method specifically comprises the steps: collecting parameters of a power grid side and a load side, including current and voltage, building an operation model of the electric power regulator based on parameter identification, and according to the operation model and a target output voltage, calculating the voltage of the electric power regulator. The method comprises the following steps: calculating to obtain a reference voltage sequence in combination with electric energy quality and efficiency constraints, monitoring the states of a power grid and a load in real time, projecting the reference voltage sequence to a safe operation envelope when voltage fluctuation or abnormity is detected, performing hierarchical derating control, generating a regulation signal of the power regulator based on the corrected reference voltage sequence, and outputting the regulation signal of the power regulator. The operation model of the power regulator is calibrated through real-time feedback; the power quality and efficiency can be considered under the normal working condition, stable voltage control can be kept during power grid fluctuation, frequency deviation or load sudden change, and resource waste caused by single shutdown or extensive derating is avoided.

The invention relates to an output power derating calculation method based on an energy storage charging pile. The method comprises the following steps: acquiring configuration data of an energy storage charging pile; calculating output power derating coefficient parameter information of a charging gun of the energy storage charging pile according to the configuration data; if the output power derating coefficient parameter information is lower than a preset derating reason analysis threshold value, acquiring state monitoring data of the energy storage charging pile; inputting the state monitoring data into a derating reason analysis model, performing derating reason analysis, and generating output power derating reason parameter information; and generating output power derating analysis result information of the charging gun of the energy storage charging pile based on the output power derating reason parameter information. By adopting the method, the power derating state and reason of the energy storage charging pile can be accurately distinguished and rapid intelligent diagnosis can be realized through the derating coefficient parameter and the derating reason parameter, the operation and maintenance cost of the charging pile can be obviously reduced and the fault can be accurately positioned, so that the intelligent and efficient upgrading of charging infrastructures is promoted.

The invention provides a medium and low voltage flexible direct current interconnection scheduling method, and relates to the technical field of power distribution network scheduling, and the method comprises the steps: carrying out the feature weight correction of a first fault judgment result and a second fault judgment result according to a transient feature quantity, and obtaining the corrected fault positioning information; specific fault equipment is determined according to the corrected fault positioning information, and a fault token containing the available capacity of the specific fault equipment is generated; and obtaining a dynamic capacity boundary of the thermoelectric coupling constraint of the specific fault equipment, constructing a dynamic scheduling optimization model, and performing optimization scheduling on the specific fault equipment according to the dynamic scheduling optimization model. According to the method, the fault information is obtained through coupling backstepping and spectral decomposition, weight correction is carried out in combination with the transient characteristics in the current limiting mode, the fault token containing the available capacity is generated and participates in scheduling, unavailable equipment can be eliminated in time or participated in derating, and the power supply continuity of key loads is guaranteed.

The invention relates to the technical field of household appliance control panels, and discloses a derating test system of a household appliance control panel. The derating test system comprises a control device used for generating a power supply instruction, a test position switching instruction and a load switching instruction according to a current test item; the power supply device is used for providing voltage corresponding to the power supply instruction according to the power supply instruction; the switching device is used for selecting a corresponding target test position from a plurality of test positions to be connected with the output end of the switching device according to the test position switching instruction; the load module is used for providing a corresponding power load according to the load switching instruction; and the waveform sampling device is respectively connected with the output end of the switching device and the control device, and is used for collecting the waveform corresponding to the target test position and sending the waveform as test data to the control device for test result judgment. By means of the mode, the demand for electric signal and component derating of the household appliance control panel is effectively met, waste of resources is reduced, and the test period is shortened.

The invention relates to the technical field of circuit breakers, and provides a self-adaptive overcurrent protection method and system for an explosion-proof circuit breaker. The method comprises the following steps: determining electrical equipment connected with an explosion-proof circuit breaker bus; carrying out load type judgment, analyzing current waveform dynamic characteristics according to the type, and constructing an overcurrent threshold mapping decision relation; collecting current environment data, analyzing the influence of the current environment data on the current bearing capacity, and generating a current bearing capacity decline index; and optimizing an over-current threshold mapping decision relation in real time according to the index, and performing over-current monitoring and protection action triggering on the bus according to the optimized mapping decision relation. The technical problems that the overcurrent setting value of a traditional explosion-proof circuit breaker is fixed, and different load working conditions and environment derating cannot be considered at the same time, so that the protection accuracy and adaptability are insufficient are solved, the overcurrent threshold value is adaptively set in real time according to the load pulse characteristic and the environment current bearing capacity, and the protection accuracy and adaptability are improved. And the over-current protection accuracy and adaptability of the explosion-proof circuit breaker are improved.

The invention relates to the technical field of battery power control, and discloses a battery available power control method, device and equipment and a computer storage medium, and the method comprises the steps: determining peak power pool energy and short-time power pool energy of a target battery, and according to a preset derating speed of the target battery, determining the peak power pool energy and short-time power pool energy of the target battery; calculating peak power pool consumption and continuous power pool consumption of the target battery in the derating process; and based on the current used power pool energy of the target battery, in combination with the magnitude relationship between the actual power and the continuous power of the target battery and the magnitude relationship among the current consumed amount, the current used power pool energy and the target power pool consumption amount, obtaining the optimized current available power of the target battery, and performing control. According to the technical scheme, the energy consumption in the battery available power derating process can be brought into the energy pool for calculation, battery over-power use is avoided, and the driving experience is improved.

The application provides a current conversion device and a control method thereof. The current conversion device comprises a power device and a controller connected to the power device. The controller is configured to determine a maximum junction temperature of the power device in a current grid cycle during operation of the current conversion device, wherein the maximum junction temperature is a maximum value of the junction temperature of the power device in the current grid cycle; determine a derating state of the current conversion device according to a difference between the maximum junction temperature and a limited junction temperature of the power device, wherein the derating state is used to indicate whether the current conversion device is operated in a derating mode and / or used to indicate a relationship between an actual derating and an expected derating when the current conversion device is operated in the derating mode; and determine a limited current of the current conversion device in a next grid cycle according to the derating state of the current conversion device, wherein the limited current is a limit value of an output current of the current conversion device. The energy conversion effect of the current conversion device can be significantly improved on the basis of improving the safety of the power device of the current conversion device.

A temperature measurement structure for a switching device (2), comprising a fixing support (1) provided with a through hole (121), at least one switching device (2) electrically connected to a circuit board and arranged on one side of the fixing support (1), and at least one temperature measurement device (3) electrically connected to the circuit board and arranged on the other side of the fixing support (1), wherein a sensing end of the temperature measurement device (3) extends into the through hole (1) to be in contact with the switching device (2). By providing the temperature measurement device (3) on the fixing support (1) onto which the switching device (2) is fixed, the temperature measurement device (3) is in direct contact with the switching device (2) by means of the through hole (121) of the fixing support (1), so that the temperature measurement device (3) can acquire the temperature of the switching device (2) in real time, thereby achieving low thermal resistance and rapid heat conduction, and improving the real-time performance and accuracy of temperature measurement of the switching device (2). Therefore, by accurately monitoring the temperature of the switching device (2) in real time, when the temperature of the switching device (2) becomes excessively high, measures such as power derating or over-temperature protection are taken promptly to protect the switching device (2) and an on-board power supply. Also disclosed is an on-board charger.

This invention discloses a GaN power amplifier system and control method based on envelope tracking and thermal feedback. The system includes a system control module, and an audio signal conditioning module, a programmable power supply module, a thermal feedback module, and a GaN power output module, all communicatively connected to the control module. The system control module executes dual closed-loop control logic: the first closed loop dynamically adjusts the output voltage of the programmable power supply module using envelope tracking technology, ensuring it closely follows changes in the amplitude of the audio signal, thus reducing power consumption and heat generation at the source; the second closed loop, based on real-time temperature data collected by the thermal feedback module, prioritizes dynamic compression of the low-frequency band of the audio signal or smoothly reduces the overall main volume when overheating occurs, achieving intelligent thermal derating protection without interrupting playback. This invention significantly improves the energy efficiency and reliability of the power amplifier system.

The invention provides a silicon photonic gyroscope suitable for wide-temperature-range adaptive power control and a control method thereof. The silicon photonic gyroscope comprises an optical chip, an optical fiber loop and an integrated circuit, the optical chip comprises a light source, a coupler, a first detector, a second detector, a modulator and a thermistor; the integrated circuit comprises a half-wave voltage control module, a light source intelligent temperature control module, a driving temperature control module and a signal demodulation module; a thermistor is integrated on a silicon photon chip to measure the working temperature of the chip in real time, meanwhile, the magnitude and direction of TEC current are measured in real time to sense refrigeration / thermal power, the magnitude of the current TEC current is comprehensively designed according to the power derating level, and the driving power of a light source is precisely regulated and controlled by adopting an advanced intelligent algorithm; the temperature and the power consumption are considered to achieve the optimal control strategy of the optical chip, and the gyro output real-time compensation is performed in the signal demodulation module aiming at the current temperature and the driving current, so that the gyro output error caused by the dynamic temperature adjustment and the unsteady state of the driving current is avoided.

The invention discloses an energy distributed control method and system applied to a micro-grid system, and relates to the technical field of distributed energy control, and the method comprises the following steps: collecting a voltage phase angle sequence at a key node of a micro-grid, constructing a phase angle extrusion dynamic fingerprint band based on the voltage phase angle sequence, and forming a time distribution rule of phase angle extrusion; and calculating an extrusion strength index according to the phase angle extrusion dynamic fingerprint band, mapping the extrusion strength index into a dynamic margin parameter of the reactive power compensation device, and limiting a reverse absorption trigger threshold according to the dynamic margin parameter. According to the method, distributed reactive power regulation and control are realized through phase angle extrusion dynamic characteristics, so that the micro-grid has adaptive stability under a multi-source fluctuation condition. The reactive power compensation device performs smooth output according to extrusion characteristics, eliminates reverse absorption and keeps voltage stable; the energy storage device implements self-adaptive derating by relying on a bus voltage dynamic support curve, coordinates active and reactive output, prevents voltage collapse, and improves the overall operation safety and continuity of the system.

The invention provides an NTC (Negative Temperature Coefficient) temperature derating circuit of an operational amplifier comparator, an LED (Light Emitting Diode) dimming method and a lighting system. The NTC temperature derating circuit comprises a first control circuit used for generating a reference voltage and a triangular wave signal; the second control circuit is used for generating a dynamic reference voltage according to the NTC resistance change; and the third control circuit generates a PWM signal by comparing the triangular wave with the dynamic reference voltage, and controls the LED current derating. A pure hardware circuit architecture based on an operational amplifier comparator is adopted, dependence on a software algorithm or an external controller is not needed, the complexity and cost of software development and debugging are remarkably reduced, and the method is particularly suitable for application scenes with high requirements for cost and reliability; temperature signals are collected in real time through the NTC resistor, and in combination with PWM dimming signals generated by the comparator, LED output current can be dynamically adjusted, and linear derating control is achieved. According to the scheme, performance degradation or damage caused by too high temperature of the LED can be effectively avoided, the service life of the LED is remarkably prolonged, and the system safety is remarkably improved.

The present invention relates to the technical field of active testing of circuit breakers, and discloses an active testing method and system for circuit breakers, which are used to solve the problem that existing active testing methods are difficult to achieve adaptive threshold adjustment. The method extracts time-domain and frequency-domain features by performing time-frequency analysis on contact velocity signals, and obtains a thermomechanical coupling feature vector by combining heat flow analysis of a thermopile array. A thermomechanical coupling dynamic graph is constructed with sensors and components as nodes and inverse thermal conductances as edge weights, and the structure is updated in real time. Node drift is predicted using a graph convolutional network. The threshold is adaptively adjusted by integrating environmental derating and predicted drift. The thermoelectric coupling component of the fast-changing contact velocity component and the rate of change of the heat flow refraction angle is extracted to generate a reverse polarity pulse compensation signal to suppress interference. Time synchronization is then achieved through secondary alignment with IEEE1588 and the cloud, closed-loop feedback of data and threshold adjustment results, and dynamic updating of graph model node weights and threshold rules to ensure synchronization with equipment health and achieve accurate early warning and protection.

The invention relates to the technical field of electric energy conversion, in particular to a parallel power supply system based on feedback injection and a current sharing method. The system comprises a plurality of power conversion branches, a central current sharing controller and a current detection circuit. Each branch comprises a power management unit, an active isolation circuit and a feedback regulation network. The controller collects the current and the change rate in real time, an analog compensation signal is injected into a branch voltage feedback pin through a feedback network, the output voltage is adjusted under the condition that the internal reference of the chip is not changed, and dynamic balance of the load current is achieved. When it is monitored that the current change rate of any power conversion branch exceeds an early warning threshold value, a derating signal is generated to control the power conversion branch to reduce the current proportion, and the power conversion branch is made to operate online in a derating mode. In addition, the invention also provides a current sharing method applied to the parallel power supply system. According to the invention, non-intrusive precise regulation and control are realized, the sub-health module is protected through active derating, the service life of the system is effectively prolonged, and the service continuity is ensured.

The invention discloses an over-temperature derating method and an over-temperature derating system based on power consumption calculation of a power device. The over-temperature derating method and the over-temperature derating system are applied to an optical storage inverter comprising a photovoltaic side circuit, a battery side circuit and an inverter side circuit. According to the method, the voltage and power of each side circuit port, the sampling temperature of a radiator and the environment temperature are obtained, and when the sampling temperature exceeds a preset derating temperature, a loss analysis model is established based on each side circuit topological structure to calculate the loss power; determining thermal resistance from a power device of each side circuit to a temperature sampling point according to a heat radiator thermal resistance network model, calculating real-time temperature of the power device by utilizing a superposition principle, and further calculating an influence coefficient and a power reduction coefficient of power consumption of each side circuit on the temperature to obtain a power derating coefficient of each side circuit; and finally calculating the power amplitude limiting value of each side circuit and implementing mutually independent power amplitude limiting control. According to the invention, differential derating control can be carried out according to different contribution degrees of power consumption of each circuit on temperature influence, and the over-temperature protection problem of the optical storage inverter is effectively solved.

The present invention relates to a method for controlling a magnet temperature in an electrical machine, comprising the steps of determining a maximum magnet temperature (4); determining an operating range with increased field loading (1); determining a current operating point; determining a permissible magnet temperature (3) at the current operating point; and setting a permissible magnet temperature (3) at the current operating point.

The application discloses a kind of over-temperature derating method and system based on power device power consumption calculation, applied to the photovoltaic storage inverter including photovoltaic side circuit, battery side circuit and inverter side circuit.The method obtains the voltage and power of each side circuit port, the sampling temperature and ambient temperature of heat sink, when the sampling temperature exceeds the preset derating temperature, establishes the loss analytical model based on the topology structure of each side circuit to calculate the loss power, determines the thermal resistance from each side circuit power device to temperature sampling point according to the thermal resistance network model of heat sink, and then calculates the influence coefficient of each side circuit power consumption on temperature and the derating power coefficient, obtains the power derating coefficient of each side circuit, finally calculates the power limiting value of each side circuit and implements independent power limiting control.The application can perform differentiated derating control according to the different contribution of each circuit power consumption on temperature, effectively solve the over-temperature protection problem of photovoltaic storage inverter.

This application relates to the field of circuit breaker technology, providing an adaptive overcurrent protection method and system for explosion-proof circuit breakers. The method includes: determining the electrical equipment connected to the busbar of the explosion-proof circuit breaker; judging the load type, analyzing the dynamic characteristics of the current waveform based on the type, and constructing an overcurrent threshold mapping decision relationship; collecting current environmental data, analyzing its impact on current carrying capacity, and generating a current carrying capacity degradation index; using this index to optimize the overcurrent threshold mapping decision relationship in real time, and performing overcurrent monitoring and protection action triggering on the busbar based on the optimized mapping decision relationship. This application solves the technical problem of traditional explosion-proof circuit breakers having fixed overcurrent setting values ​​and being unable to simultaneously consider different load conditions and environmental derating, resulting in insufficient protection accuracy and adaptability. It achieves the technical effect of real-time adaptive setting of the overcurrent threshold based on load pulse characteristics and environmental current carrying capacity, improving the accuracy and adaptability of overcurrent protection for explosion-proof circuit breakers.

The invention relates to the technical field of radio frequency communication, in particular to a millimeter wave amplifier output open circuit protection circuit. A first protection unit, a second protection unit and an adjusting unit; by utilizing the original diode protection circuit, when the load voltage output by the millimeter wave amplifier is too high, the Vload voltage reduces the bias voltage, so that the gain of the millimeter wave amplifier is correspondingly reduced, the derating of the millimeter wave amplifier is realized, the millimeter wave amplifier is protected, and the derating threshold can be actually adjusted according to the set adjusting unit. And the ns-level millimeter wave amplifier protection is realized.

The disclosure relates to an electrical charger which may be denoted a first charger for a mining / construction machine The first charger (100) is connected to a power grid (200) and configured to receive a first input power (IP1) from the power grid (200) for charging at least one first battery (310). The first charger (100) is further configured to: receive a first control signal (510) from a second charger (100´) connected to the power grid (200). The first charger (100) is configured to: increase a reference power for charging the first battery (310) when the first control signal (510) is a derating signal indicating a derating of a reference power of the second charger (100´), or decrease a reference power for charging the first battery (310) when the first control signal (510) is a boosting signal indicating a boosting of a reference power of the second charger (100´). Furthermore, the disclosure also relates to a corresponding method.

The application discloses a switching device derating method, circuit and device. The derating method comprises the following steps: collecting a first index value of a switching device; calculating a second index value associated with the junction temperature of the switching device according to the first index value; judging whether the second index value meets a derating condition; and performing a derating process on the switching device meeting the derating condition. The derating method provided by the embodiment of the application can obtain the junction temperature of the switching device without using a temperature detection device, and has high precision.

The present invention discloses a method and system for over-temperature derating of a drive motor system, the method comprising: obtaining real-time temperature information of a drive motor; and then judging whether a first preset temperature is exceeded; if exceeded, starting a first counting instruction, and obtaining a countable accumulative time corresponding to a current current, and then based on a preset time interval and a current current, performing cumulative counting or cumulative subtraction on the countable accumulative time to obtain a cumulative time result or a cumulative subtraction time result; judging whether the cumulative time result or the cumulative subtraction time result satisfies a first logical relationship; if satisfied, generating a first end instruction to end counting.

This invention discloses a method, device, and storage medium for energy storage battery state estimation and hierarchical closed-loop control based on multi-source state reliability aggregation. The method collects voltage, current, temperature, and controlled object state data, preprocesses them, and inputs at least two state estimation sources, diagnostic sources, or model branches to obtain source outputs. A reliability index is determined based on at least one of residuals, innovation quantities, covariance, sensor quality, or model uncertainty. The source outputs, reliability index, and input data quality index are constructed into a target risk feature set, and the reliability index is used as an independent correction quantity in risk assessment. Based on the risk assessment results modulated by reliability, the risk level and risk cause labels or control constraint variables are determined, generating equalization, thermal management, charge / discharge derating, or protection control commands. Under low reliability conditions, the system enters a conservative control mode and corrects control parameters based on feedback.

Embodiments of the present disclosure relate to the technical field of ship electrical systems, and provide a method for preventing the collapse of the DC bus in a ship electrical system and a ship electrical system, which can at least solve the problem that the existing ship electrical system cannot quickly respond to the bus collapse caused by the unit failure shutdown. The method includes: detecting whether the DC networked driver is in an overloaded state at a sampling moment; if so, obtaining the rated current of the DC networked driver and the output current of the DC networked driver at the sampling moment; obtaining the overload coefficient of the DC networked driver according to the rated current of the DC networked driver and the output current of the DC networked driver at the sampling moment; obtaining the cumulative overload of the DC networked driver according to the overload coefficient of the DC networked driver and the overload time of the DC networked driver; and adjusting the output current limit of the DC networked driver at the moment according to the cumulative overload of the DC networked driver and the load derating coefficient.

Method for managing a derating of a thermal power transferred to a cabin of a vehicle with an electric powertrain, in case of a full exploitation of the available thermal power, without resorting to the use of a double electric heater, one for the heat transfer liquid entering a cabin heater (CAB) in a heat exchange relationship with the cabin, and one for the heat transfer liquid which enters a heating circuit of a high-voltage battery (BAT), so that it is possible to maintain the use of a single electric heater (ECH).

A power converter based on a high-efficiency synchronous rectification circuit is characterized in that three groups of switch tubes are connected in parallel to a secondary side, namely a synchronous rectification end, of a transformer, and each group consists of two MOS (Metal Oxide Semiconductor) tubes, so that the current derating is improved, and the current is increased; the conduction internal resistance is reduced, and the efficiency is improved; the output end voltage is prevented from upside down; a synchronous rectification driving controller is added in the synchronous rectification circuit, so that the secondary side output waveform of the transformer is optimized, the conduction of a switching tube is facilitated, and the loss is reduced; current at the output end of the transformer is weak, and the synchronous rectification driving controller is added for current expansion, so that the driving capability is enhanced.

The invention provides a regional distributed power supply system, and belongs to the field of power electronics, the power supply system comprises power supply modules distributed in a plurality of regions and a master control module connected with the power supply modules, the plurality of power supply modules are connected with the same power input end, and the master control module is connected with the power supply modules. One or more power supply modules in each area are connected with a plurality of loads in the area where the power supply modules are located; the power supply module comprises an EMI filtering assembly, a power supply preprocessing assembly, an impedance matching network, a power conversion assembly and a communication management module. When a certain power supply module breaks down, fault information is reported to the main control module through the communication management module of the power supply module, the communication management module controls the power supply module to actively break away from the whole power supply system, and derating work of the power supply system is achieved when the power supply system breaks down. And when the communication of a certain power supply module fails, the communication management module of the power supply module is judged to fail through the communication management module of the adjacent power supply module, and the main control module isolates the power supply module and enables the power supply system to work in a derating manner.

The invention relates to a dynamic real-time electric energy management device for industrial electric equipment. The dynamic real-time electric energy management device comprises a monitoring module, a control module, a compensation module and a communication interface, the monitoring module is used for synchronously acquiring three-phase current and line voltage and extracting harmonic and inter-harmonic characteristics; the control module is internally provided with an artificial intelligence model, predicts the amplitude, the phase and the change rate of the target harmonic wave according to the characteristics, obtains a time advance by combining with control delay estimation, and generates a compensation instruction for correction in advance; the compensation module is composed of a three-level T-type neutral-point-clamped active electric power filtering power unit capable of being expanded in parallel and a detachable passive filter, and harmonic waves, voltage fluctuation and three-phase imbalance are comprehensively compensated by adopting an active and passive cooperative compensation strategy; and the communication interface is used for uploading monitoring data, a compensation state and a model confidence coefficient, receiving a remote configuration and model updating instruction, and carrying out self-calibration, early warning and derating on online impedance identification and health assessment. Therefore, the harmonic content is remarkably reduced, fluctuation and imbalance are suppressed, the power factor and the system reliability are improved, and the power quality standard is met.

The utility model provides an LED drive circuit with current derating, characterized in that: the anode of a diode D1 is connected with a power supply input end, and the cathode of the diode D1 is connected with a node A; one end of the resistor R2 is connected with the node A, and the other end is connected with the node C; one end of the resistor R3 is connected with the node C, and the other end is connected with the output end; the first connecting end of the triode Q2 is connected with the node C, and the second connecting end is connected with the output end; the output end is connected with the positive electrode of the LED, and the negative electrode of the LED is grounded; one end of the resistor R1 is connected with the node A, and the other end is connected with the node B; one end of the resistor R5 is connected with the node B, and the other end is grounded; the first connecting end of the triode Q1 is connected with the control end of the triode Q2 through a resistor R4, the control end of the triode Q1 is connected with the node B, and the second connecting end of the triode Q1 is grounded. Compared with the prior art, the vehicle-mounted high-power LED over-temperature protection circuit is suitable for over-temperature protection of a vehicle-mounted high-power LED, a high-temperature current derating circuit is built by adopting a separated device, and the cost is obviously lower than that of the existing scheme in the market.