745 results about "Current switch" patented technology

A system for an electrified vehicle, such as a battery electric vehicle (BEV), includes an inverter configured to drive a motor having motor windings with electrical power from a battery according to a configuration of a power switch of the inverter. The system further includes a capacitor connected between a center-tap of the battery and a neutral-point of the motor winding whereby the capacitor and the motor windings form an LC circuit. The system further includes a controller configured to operate the power switch in a zero-current-switching mode with a switching frequency dependent on a resonant frequency of the LC circuit to thereby cause electrical current to circulate between the battery, the inverter, and the motor which heats the battery and the motor windings.

The invention relates to the technical field of power supply starting, in particular to a power supply starting system with ultra-large capacitive load energy and a starting control method.The power supply starting system comprises a power supply body and a load module, the output end of the power supply body is coupled with the load module, and the power supply body comprises a constant-current control module; the detection module is used for detecting output current in a power supply starting process and transmitting a detection result to the MCU control unit; the MCU is used for generating a PWM (Pulse Width Modulation) signal according to the received output current signal so as to control the starting current to be constant; the PWM driving module is used for adjusting the output current of the power supply according to the PWM signal generated by the MCU control unit, and the error amplifier is used for amplifying the output current signal detected by the constant current control module and transmitting the output current signal to the MCU control unit; the current sensor is used for detecting the output current of the power supply in real time; and the MOSFET switch is used for adjusting the output current of the power supply according to the PWM signal. According to the invention, the problem of restarting due to overcurrent protection caused by a large capacitive load in a power supply starting process is solved.

The invention discloses a remote load removal and reset method for a large-current switch built-in electric energy meter, and relates to the technical field of intelligent power grids, and the method comprises the steps: collecting current data and voltage data in real time through a dynamic load monitoring module, and generating an early warning signal when the current data and the voltage data exceed a load threshold value; load data are synchronized in the distributed network, and a master control node sends an instruction to control load removal of the electric energy meter; and detecting the stable state of the load, and executing remote reset after a reset condition is met. According to the method, the system response speed and the overload detection capability are improved, the potential damage risk caused by overload to equipment and the system is reduced, the high efficiency and the reliability of load management are ensured, the efficiency and the reliability of load removal are improved, the safety and the stability of power grid operation are ensured, and the economic benefit is increased. The stability and reliability of power supply recovery are improved, the fault tolerance of the system is improved through an exception handling mechanism, and the stability of reset operation is guaranteed.

The invention discloses a large-current switch built-in electric energy meter terminal temperature measurement and temperature control method, and relates to the technical field of electric energy meter terminal temperature measurement and temperature control. The method comprises the following steps: carrying out real-time temperature acquisition on an electric energy meter terminal, and adaptively adjusting communication parameters; the temperature is adjusted and controlled based on a PID algorithm, and the temperature adjusting stability is analyzed; and the temperature is automatically judged, an ending instruction is sent, and quitting is conducted within the safe temperature range. According to the terminal temperature measurement and temperature control method for the large-current switch built-in electric energy meter, the accuracy and the real-time performance of temperature monitoring are improved by adopting an incremental PID control algorithm and a dynamically calibrated thermal resistance sensor, communication errors in the temperature measurement and temperature control process are reduced by optimizing Bluetooth communication, and the terminal temperature measurement and temperature control efficiency is improved. The whole reliability of the system is improved, the safety and convenience of operation are improved through an automatic test process and a safe exit mechanism, and better effects are achieved in the aspects of accuracy, real-time performance and safety.

The invention discloses a three-port soft switching optical storage servo all-in-one machine based on device multiplexing and a modulation method. The all-in-one machine comprises a DC-AC servo driver, a low-voltage DC energy storage module, an auxiliary unit, a bus capacitor and a photovoltaic module. The DC-AC servo driver comprises three bridge arms, and each bridge arm is provided with a bridge arm upper tube and a bridge arm lower tube; the low-voltage direct-current energy storage module comprises an energy storage battery, an energy storage switch tube S7 and a direct-current energy storage inductor; the photovoltaic module comprises a photovoltaic power generation panel, a photovoltaic inductor, a photovoltaic switch tube S8 and a diode D1; the auxiliary unit comprises an auxiliary switch tube Sa, an auxiliary resonant inductor Lr and an auxiliary capacitor Cr. According to the invention, an integrated resonant soft switching architecture is innovatively adopted, zero-voltage / zero-current switching of all power switching devices is realized, and the problem of loss caused by a traditional hard switch is thoroughly solved; and by optimizing a device multiplexing technology, the number of switching tubes is greatly reduced while the soft switching performance is ensured, so that the system efficiency is improved in a breakthrough manner.

A flying capacitor converter, a voltage converter and an energy storage system are provided. The flying capacitor converter includes a high-voltage side, a low-voltage side, a power switch unit, a current switch unit and a current detection unit. The high-voltage side is electrically connected with a first power source. The low-voltage side is electrically connected with a second power source. The power switch unit is electrically connected between the high-voltage side and the low-voltage side and includes three terminals and four power switches. The current switch unit is electrically connected with the high-voltage side, the low-voltage side and / or a common node. The current detection unit is electrically connected between a third terminal of the power switch unit and the common node. If the current detected by the current detection unit indicates that a short-circuit condition occurs, the power switch unit is disconnected from the high-voltage side and / or the low-voltage side.

The invention provides a method for setting a relationship between conduction voltage drop and junction temperature of a power device in a large-current on-off state, and the method enables a tested device to work in the on-off state, and the large current flowing through the device is a square wave current with a fixed amplitude and a fixed duty ratio. The operation junction temperature and the reference point temperature are set by controlling the operation condition of the circuit and the temperature of the radiator; after the device runs to a thermal steady state, measuring the conduction voltage drop and the reference point temperature of the device, then cutting off a large current, and injecting a constant small current into the measured device to measure the junction temperature of the measured device; the equivalent temperature of the packaging material is represented by the reference point temperature, and a linear relation among the conduction voltage drop, the reference point temperature and the junction temperature under the large current is fitted. According to the invention, the self-heating and external heating conditions of the whole timer can be flexibly controlled, and the influence of the temperature of the packaging material on the conduction voltage drop is considered, so that the accuracy of predicting the junction temperature by using the conduction voltage drop under large current is improved.

A switch-mode power supply is used to provide an output voltage and includes an inductor and a power switch, where the power switch is used to control the current flowing through the inductor. A control method for the switch-mode power supply includes: providing a compensation signal controlled by the output voltage; providing a stable compensation signal for the low-frequency component of the compensation signal based on the compensation signal; providing a mixed operation mode, in which the switch-mode power supply alternately operates during a switching operation period and an skip period, the power switch opens at least once during the switching operation period, and the power switch is closed during the skip period; based on the difference between the compensation signal and the stable compensation signal, ending one of the switching operation period and skip period, and starting another one of the switching operation period and skip period.

The invention belongs to the technical field of power distribution network state analysis and prevention, and relates to a power distribution network switch state sensing and analyzing method. Comprising the following steps: a power distribution network switch state sensing system based on multi-source information fusion realizes fusion and mutual correction of switch displacement information, public and special transformer power failure signals, public and special transformers and low-voltage user measurement curve interrogation signal sources, constructs a power grid topology segmentation model, and realizes distribution network switch state sensing; the power distribution automation switch telemetering module measures, collects and transmits the switch state and electrical parameters in the power distribution network in real time through remote measurement and monitoring. The multi-source information fusion power distribution network switch state sensing system is used for solving the problems that the automation level of current switch equipment is limited, multi-source electric appliance data conflicts, telemetry information false alarm is easily caused, and power distribution network equipment sensing data is inaccurate. Fusion and mutual correction of switch displacement information, public and special transformer power failure signals, public and special transformers and low-voltage user measurement curve interrogation signal sources are realized.

The invention discloses a CMOS analog multiplier circuit, the circuit comprises a current-to-voltage circuit and a multiplier sub-circuit connected with the current-to-voltage circuit, an OSC circuit in the multiplier sub-circuit receives an input voltage VB and a reference voltage VREF and generates a two-phase non-overlapping clock signal group, a voltage-to-current A circuit converts a voltage VA into a current iA, and the current iA is connected with the OSC circuit. The switched capacitor integrating circuit inputs a sampling voltage to the voltage-to-current B circuit and integrates a difference current is of a current iA and a current iB to realize multiplication, the voltage-to-current B circuit converts a sampling voltage signal into the current iB, and the current-to-voltage circuit converts the current iB into an output voltage Vo as a multiplier operation result. Through combination of modular design, a current mode method and a switched capacitor method and high-precision current conversion and integration processes, an efficient and accurate multiplication simulation function is realized, a THD enhancement function is introduced through multiplexing design, and circuit performance is further optimized.

The invention discloses an optimal configuration method and system for a flexible interconnection switch in a low-voltage distribution area, and the method comprises the steps: determining the characteristic parameters of the flexible interconnection switch, including a rated voltage, a rated current, a switching frequency, an inductance value, a modulation ratio, response time and a communication control interface, so as to construct a characteristic vector of the flexible interconnection switch; based on the distributed energy consumption rate and the demand response instruction, taking the feature vector of the flexible interconnection switch as an optimization variable, and constructing a multi-target optimization configuration model of the flexible interconnection switch in the low-voltage distribution area; according to the method, the characteristics of the low-voltage power distribution network and the problem of high cost of the flexible interconnection switch are fully considered, so that the adaptability of flexible interconnection switch control to the low-voltage power distribution network is improved; the system optimizes energy configuration, improves the operation stability of a power system, improves the utilization efficiency of a power supply, improves the voltage level of a feeder line, and improves the capability of consuming a distributed power supply.

The invention provides a totem pole PFC circuit control method and a power conversion device. The totem-pole PFC circuit comprises a first inductor, a first bridge arm and a second bridge arm, the first bridge arm and the second bridge arm are connected in parallel between the positive electrode and the negative electrode of the DC interface of the totem-pole PFC circuit, the first end of the first inductor is connected to the midpoint of the first bridge arm, and the second end of the first inductor and the midpoint of the second bridge arm are used for being connected with an AC power supply. The method comprises the following steps: controlling switch tubes of a first bridge arm and a second bridge arm to be closed within a first duration starting from a first moment before each zero-crossing moment of an alternating current power supply, and controlling a main switch tube of the first bridge arm to work within a second duration starting from a second moment after the zero-crossing moment, the follow current switch tubes of the second bridge arm and the first bridge arm are controlled to be closed; wherein the last moment of the first duration is the second moment. According to the control method provided by the invention, the leakage current of the power conversion device comprising the totem-pole PFC circuit can be effectively reduced.

The invention relates to the field of high-voltage or large-current switches with arc extinguishing or arc preventing devices, in particular to a circuit breaker. An existing circuit breaker is improved, a brand-new solid-sealed polar pole is adopted, and high-pressure gas is compressed and generated in the opening and closing process of the solid-sealed polar pole by means of linear motion of a transmission rod in the opening and closing process of the solid-sealed polar pole and an air cylinder in transmission connection with the transmission rod; high-pressure gas is subjected to heat dissipation through the heat dissipation pipe section of the slow-release exhaust pipeline, and then low-temperature high-pressure gas is continuously blown into the heat dissipation gas cavity through the slow-release exhaust pipeline, so that heat exchange is carried out in the arc extinguish chamber in the heat dissipation gas cavity, high temperature generated in the opening and closing process of the arc extinguish chamber is taken away, and heat dissipation and cooling of the arc extinguish chamber are achieved. According to the novel solid-sealed polar pole, heat dissipation and cooling of the arc extinguish chamber are achieved by means of power provided by an operating mechanism in the opening and closing process, other cooling equipment does not need to be configured, the system structure is simplified, and energy consumption is reduced.

A power factor correction circuit includes an inductor configured to receive an input voltage and supply an output voltage; a power switch connected to the inductor and configured to control an input current flowing through the inductor; and a switch controller configured to receive a feedback voltage including information on the output voltage and an auxiliary voltage including information on a voltage of the inductor and control an on / off operation of the power switch. The switch controller is further configured to operate in a first mode when the feedback voltage is less than a reference voltage, and operate in a second mode when the feedback voltage is greater than the reference voltage.

The invention discloses a formation and capacity grading parallel detection system based on a high-voltage direct-current bus. A press device comprises a direct-current switch and at least one set of pull-out type charging and discharging probe module. And the input end of the direct-current switch is connected with the output end of the PCS equipment. Each charging and discharging probe module adopts a pull-out structure and comprises a mechanical frame, and a high-voltage direct-current bus, a bidirectional conversion module and a probe assembly which are integrally mounted in the mechanical frame; the high-voltage direct-current bus input end is connected with the direct-current switch output end; the bidirectional conversion module comprises two stages of conversion units; the first conversion unit is used for reducing the first voltage of the high-voltage direct-current bus into the second voltage or reversely increasing the voltage; the second conversion unit reduces the second voltage to the voltage required by charging and discharging of the battery or boosts the second voltage; the probe assembly is connected to the output end of the second conversion unit. The system is compact in structure, high in charging and discharging efficiency and convenient to maintain, and cables are saved.

An imaging system comprises a pixel array configured to generate a plurality of image charge voltage signals in response to incident light, and readout circuitry coupled to the pixel array, the readout circuitry including a plurality of column unit cells. Each column unit cell comprises at least one of a plurality of comparators, wherein each comparator is coupled to receive the ramp signal from the ramp generator through a ramp signal line. Each column unit cell also comprises a compensation current unit coupled to the ramp signal line, each compensation current unit comprising a compensation current source and a compensation current switch coupled to the compensation current source, wherein the compensation current source and the compensation current switch are coupled between a first node on the ramp signal line and a second node.

The invention relates to the technical field of power system control, and discloses a flexible load control technical method based on a high-current switch built-in electric energy meter, which comprises the following steps: monitoring current and voltage in real time, and inputting data into a fuzzy logic control system; formulating a fuzzy rule, and judging a current state through fuzzy logic control; implementing a safe load removal and reset strategy for a super-capacitance power utilization scene, and executing an overcurrent opening operation; setting a maximum load threshold value according to different power utilization environment characteristics, and formulating a load control strategy; and a multi-stage power control scheme is implemented, and a load control security authentication mechanism is established. According to the method, electricity utilization characteristic research in typical application scenes is carried out, a load flexible control technology is researched in combination with a switch built-in scheme, a multi-scene and multi-cost control strategy is made through multi-stage power control, overcurrent opening and self-adaptive closing functions, flexible control over power consumers is achieved, and the electricity utilization management level is improved.

The invention provides a switch cabinet temperature and humidity monitoring method based on a multivariate neural network, and the method specifically comprises the steps: collecting the temperature and humidity data of a switch cabinet, carrying out the preprocessing of the temperature and humidity data, and constructing a corresponding training data set; constructing a CNN-LSTM temperature and humidity prediction model, and training the CNN-LSTM temperature and humidity prediction model in combination with a sparrow optimization algorithm and the training data set; according to the current temperature and humidity data of the switch cabinet, temperature and humidity prediction data of the switch cabinet are obtained through prediction, condensation abnormity judgment of the switch cabinet is carried out, a switch cabinet adjusting strategy is set according to the condensation abnormity judgment result of the switch cabinet, and the temperature and humidity in the switch cabinet are adjusted. According to the invention, the multivariate neural network is used for processing a prediction scene with a large data volume, the over-fitting problem of the model is solved through the sparrow optimization algorithm, the prediction precision is improved, the accuracy of subsequent switch cabinet condensation abnormity judgment is improved, and the operation safety of the switch cabinet is guaranteed.

The invention discloses an intelligent verification and detection method for a large-current switch built-in electric energy meter, and relates to the technical field of electric energy meter detection and calibration. Outputting the difference between the output data of the standard electric energy meter and the output data of the tested electric energy meter through the real-time error model; function detection is carried out; and dynamic self-calibration is carried out based on real-time analysis detection data. According to the intelligent verification and detection method for the large-current switch built-in type electric energy meter provided by the invention, the real-time error model is constructed, so that the real-time performance and accuracy of detection are remarkably improved. Through absolute error and relative error models, the contribution of each parameter to the error can be accurately quantified, and guidance is provided for design optimization of the electric energy meter. The starting, creeping, cost control functions and communication functions are detected through the function detection module, the multifunctionality and the performance stability of the electric energy meter are guaranteed, and better effects are achieved in the aspects of the detection precision and adaptability and the adaptability of the system to complex working conditions.

The invention relates to the technical field of high-voltage cascade energy storage systems, and discloses a high-voltage cascade energy storage system based on nested power modules and a control method thereof.The high-voltage cascade energy storage system comprises three phases of chain type energy storage bridge arms connected with three phase lines of a power grid respectively, and each phase of chain type energy storage bridge arm comprises a plurality of cascaded nested power modules; each nested power module comprises a plurality of direct-current chain type energy storage units and an H-bridge circuit, the plurality of direct-current chain type energy storage units are connected in parallel and then are connected with the direct-current side of the H-bridge circuit, and the alternating-current side of the H-bridge circuit is connected with an alternating-current switch; the direct current chain type energy storage unit comprises a plurality of energy storage modules, an electric reactor and a direct current switch, the plurality of energy storage modules are cascaded and then are sequentially connected with the electric reactor and the direct current switch, each energy storage module comprises a battery pack and a half-bridge circuit connected with the battery pack, and the half-bridge circuit is used for charge state balance control of the battery pack. According to the invention, any battery pack can be bypassed after a fault, and the operation reliability of the high-voltage cascade energy storage system is improved.

The invention discloses a Hall sensing chip and a control method thereof. The Hall sensing chip comprises a Hall calibration module used for generating a first voltage and a second voltage according to a bias current, and a rotating current switch module connected with the Hall calibration module and used for alternately changing the direction of the bias current input into the Hall calibration module and enabling the Hall calibration module to alternately generate a first output voltage and a second output voltage. The analog-to-digital conversion module is connected with the rotating current switch module and is used for generating a first digital signal according to the first output voltage and generating a second digital signal according to the second output voltage; and the calibration module is respectively connected with the analog-to-digital conversion module and the rotating current switch module, and is used for generating bias current according to the first digital signal, the second digital signal and the reference signal. Closed-loop negative feedback self-calibration can effectively eliminate drift of sensitivity of the Hall sensing chip under temperature and stress changes.

The invention relates to the technical field of power equipment testing, in particular to a high-voltage direct-current switch integrated equipment aging test platform which comprises a multi-dimensional interface adaptation module, a collaborative aging test module, an aging feature extraction module and a cyclic test control module. The multi-dimensional interface adaptation module realizes rapid access and standardization by acquiring device interface features and comparing and adjusting, cooperates with the aging test module to synchronously apply four stresses, obtains a dynamic acceleration factor quantitative acceleration effect through a coupling formula, the aging feature extraction module extracts related parameters, quantifies the degradation degree in combination with a dynamic weight formula, and finally obtains the aging test result. The cycle test control module adjusts the cycle index according to the acceleration factor and the degradation degree and in combination with the fluctuation amplitude, rapid equipment adaptation is achieved, the composite aging process can be accurately reproduced, the test process is dynamically optimized, the test standardization level, the consistency with the actual working condition and the test efficiency are remarkably improved, and the test efficiency is improved. And reliable technical support is provided for equipment aging characteristic evaluation.

A current steering digital-to-analog converter includes a plurality of current cells each including a current source circuit and a current switch circuit to selectively output a current in response to a first input signal corresponding to a digital signal; a dummy current cell including a dummy current source circuit and a dummy current switch circuit to output a current in response to a second input signal; and a current switch bias circuit coupled to the dummy current cell to track a first voltage of an internal node of the dummy current source circuit and configured to generate a first bias voltage applied to the current switch circuit.

The invention relates to the technical field of wireless charging, and particularly discloses a wireless electric energy transmission system for multi-split charging of an electric bicycle, which comprises a direct-current voltage source UD, a high-frequency inverter H, an alternating-current switch Si, a transmitting side LCC compensation network, a magnetic coupler, a receiving side LCC compensation network, a rectifier Di, a filter capacitor CFi and a battery load RBi, an alternating current switch Si, the transmitting side LCC compensation network, the magnetic coupler, the receiving side LCC compensation network, the rectifier Di, the filter capacitor CFi and the battery load RBi form an electric energy output channel, the output channel is connected with the high-frequency inverter H, and the output end of the rectifier Di supplies power to the battery load RBi through the filter capacitor CFi. The beneficial effects of the invention are that the system can achieve the automatic switching of a plurality of output channels from a constant current mode to a constant voltage mode under the condition of no detection and no special control circuit, improves the utilization rate of an inverter, saves an open circuit protection circuit, reduces the cost, and is suitable for the one-to-many charging application of electric bicycles of different specifications.

The invention relates to the field of data processing, in particular to a method and system for analyzing the health degree of main parts of a switch cabinet, and the method comprises the steps: analyzing the degradation influence of various events in the switch cabinet on parts through extracting historical data or other monitoring data and maintenance test data of the switch cabinet which can be used as a reference; and thus, a deterioration relation model of main parts in the switch cabinet is constructed. Monitoring data in the current switch cabinet are collected, and the degradation degree of main parts in the switch cabinet is evaluated by combining the degradation relation model. According to the method, the evaluation model is constructed based on the sample data, and the deterioration degree evaluation is performed on the main parts in the switch cabinet before the deterioration phenomenon occurs, so that the deterioration degree prediction can be performed before the deterioration phenomenon occurs on the parts, and guidance can be provided for replacement and maintenance of the parts so as to save maintenance resources.

The utility model discloses a double-current alternating excitation circuit of an electromagnetic flowmeter. The circuit comprises a V / I conversion circuit A and a V / I conversion circuit B which are respectively used for converting the voltage of a voltage-stabilized direct-current power supply VCC1 and the voltage of a voltage-stabilized direct-current power supply VCC2 into current, and a current switching circuit which is used for switching and connecting the V / I conversion circuit A and the V / I conversion circuit B into a direction switching circuit, a direction switching circuit for switching a current switching circuit to a current direction and a CPU (Central Processing Unit) are used for switching the current of a V / I conversion circuit A and a V / I conversion circuit B which are accessed by controlling a current switching circuit Q and controlling the direction switching circuit to switch the direction of the current accessed by the current switching circuit, so that a coil of the sensor generates forward and reverse alternating excitation excitation; the problem of insufficient sampling time caused by inductance of a sensor coil can be avoided under high excitation frequency, heating of the excitation circuit can be effectively avoided, and the utilization efficiency of a power supply is improved.

The invention provides a modulation method used for a CLLC converter to realize bidirectional symmetrical power transmission, and the method comprises the steps: enabling the CLLC converter to work in an OP mode during reverse power transmission, and enabling the OP mode to comprise a P stage and an O stage: in the P stage, secondary side current is a negative value, the converter transmits reverse power, and the secondary side current enters the O stage after zero current switching is completed; in the O stage, the secondary side current becomes a positive value, a negative P mode is entered, and reverse power transmission is completed; during switching between the P stage and the O stage, a primary side 50% complementary square wave driving signal is used for control, it is ensured that the switching frequencies are the same during forward transmission and reverse transmission under the same voltage gain and opposite loads, and bidirectional switching of reverse power transmission and forward power transmission is achieved by adjusting the alignment edges of primary side driving signals and secondary side driving signals. According to the invention, the OP mode is introduced to replace the traditional NP mode to realize bidirectional power transmission, and the frequency modulation range of the CLLC converter is reduced.

The invention discloses an intelligent management system for urban tunnels, building equipment control systems are mutually connected through a network to form comprehensive and integrated power supply, monitoring and control, an integrated control cabinet is arranged at the tail end of the intelligent management system, and power distribution, metering, electrical safety and control are integrated in the integrated control cabinet. The control core monitors the voltage, current, power, electric quantity, residual current, on-off state, lightning arrester state and cabinet temperature of a power supply loop in the cabinet and the current and state of an output loop; wherein the residual current alarm adopts an independent communication type, and forms a residual current alarm system through an integrated energy-saving electrical network; the integrated control cabinet is provided with a communication interface which communicates with FAS and SAS, functions of building equipment monitoring, power monitoring, illumination control, residual current detection, energy consumption metering, building environment detection and energy efficiency management are realized by applying a set of software, and real-time and historical data interconnection and intercommunication and interface integration are realized.

The utility model provides a motor fault monitoring alarm. The motor fault monitoring alarm comprises a shell; the detection end of the current detection module is connected with the winding of the motor, and the current detection module is used for detecting the winding current of the motor; the switch module is connected to a power supply path of the motor in series, and the switch module is used for selectively conducting the power supply path of the motor; the input end of the processing module is connected with the output end of the current detection module, the output end of the processing module is connected with the input end of the switch module, and the processing module is used for sending out an alarm signal according to the winding current and controlling the on-off of the switch module. According to the motor fault monitoring alarm, an automatic motor monitoring mode is utilized, operation is simpler and more convenient, the accuracy is higher, the detection efficiency and quality of motor faults are effectively improved, the motor faults can be processed in time through the automatic monitoring mode, and then more serious safety accidents are avoided.

The invention relates to the technical field of power management, in particular to a two-way switching LDO framework suitable for an MCU sleep mode. Comprising a main LDO, an auxiliary LDO and a current detection circuit. The main LDO comprises a second error amplifier and a second adjusting tube; the auxiliary LDO comprises a first error amplifier and a first adjusting tube; the main LDO and the auxiliary LDO share the same voltage feedback network, and the voltage reference and the feedback output of the voltage feedback network are connected with the input end of the first error amplifier and the input end of the second error amplifier at the same time. The outputs of the first adjusting tube and the second adjusting tube are short-circuited and then are output to the MCU, and are simultaneously input to the input end of the voltage feedback network; the input end of the current detection circuit is connected with the output end of the first error amplifier, and the output end is connected with the current switch of the second error amplifier. The architecture provided by the invention meets the requirements of low power consumption and quick response of the MCU, and the power consumption of the architecture is not influenced by the power consumption of the MCU.