1811 results about "Reference current" patented technology

The invention discloses a low-output-ripple automatic-current-sharing interleaving buck converter and a control method thereof.The converter comprises a main power circuit and an auxiliary compensation circuit, and the main power circuit adopts two interleaving main branches to achieve voltage conversion and energy transmission; automatic current sharing of the circuit is realized through the integrated network switch module and PWM signal control; the auxiliary compensation circuit adopts a current mirror image compensation principle, and adjusts the magnitude of the compensation current by comparing the difference between the output current of the main power circuit and the reference current, so as to effectively suppress the output current ripple; the control method comprises the steps of output voltage monitoring, PI adjustment, duty ratio modulation and a complementary control mechanism, current ripple phase offset is ensured, and the system stability and efficiency are improved. Compared with the prior art, the method has the advantages that the complexity of a control system is reduced, the working efficiency is improved, the current ripples are effectively eliminated, and the method has relatively high practical value and popularization prospect.

The invention discloses a six-winding high-voltage variable-frequency speed regulation control method and system, and belongs to the technical field of high-voltage variable-frequency speed regulation, and the method comprises the steps: building an electric-thermal-magnetic coupled six-dimensional nonlinear system model through collecting the structural parameters, thermosensitive data and an initial state of a motor; establishing a frequency domain regulation and control matrix among the six windings in combination with the operation condition and the load type; predicting a future disturbance power trend by using a weighted short-time Fourier analysis method, dynamically correcting the reference current of each winding, and generating six groups of PWM control signals; when the performance of the winding is degraded, fault-tolerant topology reconstruction and driving task redistribution are executed; periodically reconstructing a control matrix through a thermoelectric feedback mechanism, and executing parameter adaptive optimization according to a current balance coefficient and hot redundancy distribution; according to the method, high-precision current coordination control, frequency domain energy decoupling and winding thermal load balancing can be realized, and the speed regulation response speed, the stability and the fault-tolerant capability of the system are remarkably improved.

The invention discloses an impedance characteristic remodeling method, device and equipment and a medium, and is applied to the field of wind turbine generators. Wherein the corresponding rotor reference current is determined according to the electromagnetic reactive power, the active power and the corresponding power reference value; correcting the rotor current according to the rotor reference current by adopting a virtual admittance control mode, and generating a corresponding rotor voltage given value; sequentially performing differentiation, filtering and signal extraction processing on the rotor reference current and the rotor current to obtain an impedance remodeling signal; and correcting the rotor voltage given value based on the impedance remodeling signal so as to enable the corrected rotor voltage given value to serve as the control voltage of a rotor side converter in the medium-voltage doubly-fed wind turbine generator after impedance characteristic remodeling. The virtual admittance control mode and the impedance remolding signal mode are adopted to suppress the negative resistance effect of the rotor side converter in the medium-voltage doubly-fed wind turbine generator under voltage disturbance, and therefore the damping effect on external excitation in the sub-super-synchronous frequency band and the high frequency band is higher.

The embodiment of the utility model provides a resistor calibration circuit, a resistor calibration device and an electronic device. The resistor calibration circuit comprises a current source module used for outputting a reference current; the standard resistor module is connected with the current source module to receive the reference current and generate a reference voltage; in the working process of the resistor calibration circuit, a resistor to be calibrated is connected with the current source module to receive the reference current and generate a voltage to be measured, and the analog-to-digital converter is connected with the standard resistor module to perform analog-to-digital conversion on the voltage to be measured based on the reference voltage. According to the resistance calibration circuit, the analog-to-digital converter in the module to be measured is multiplexed for resistance calibration, an additional high-precision measurement calibration system is not needed, and the resistance can be calibrated only by providing the current source module and the standard resistance module, so that the resistance calibration cost is reduced.

The invention discloses a hybrid effective flux linkage observer and a permanent magnet synchronous motor control method, device and system. The method comprises the following steps: carrying out Clarke conversion on an obtained three-phase current of the permanent magnet synchronous motor to obtain a current in a static coordinate system, and carrying out park conversion based on rotor position information to obtain a current in a synchronous rotating coordinate system; the effective flux linkage of the permanent magnet synchronous motor is obtained through the hybrid effective flux linkage observer; on the basis of the obtained effective flux linkage of the permanent magnet synchronous motor, dead-zone compensation voltage is obtained through self-adaptive gain dead-zone compensation calculation based on back electromotive force reconstruction, and the rotating speed and the rotor position of the permanent magnet synchronous motor are obtained through phase-locked loop calculation; according to the rotating speed and the rotor position of the permanent magnet synchronous motor, the current under the synchronous rotating coordinate system, the dead zone compensation voltage and the obtained reference rotating speed and reference current, the reference voltage of the motor at the k moment is obtained through a rotating speed loop and a current loop and used for achieving low-speed position-sensorless control over the permanent magnet synchronous motor.

The invention relates to a multi-frequency bioelectrical impedance-based body fat accurate measurement method and system. The method comprises the following steps: receiving a mode selection instruction sent by a user to determine a current working mode; if the mode is a rapid measurement mode, applying single reference frequency and reference current intensity excitation, obtaining a single group of bioelectrical impedance data, and calculating a rapid body fat rate result; if the measurement mode is an accurate measurement mode, acquiring bioelectrical impedance data under a plurality of preset frequencies and a plurality of preset current intensities through a complete electrode system, performing signal processing on the data, extracting impedance amplitude and phase information, constructing an impedance characteristic curve, extracting characteristic parameters related to the body fat rate from the impedance characteristic curve, and calculating the body fat rate based on the characteristic parameters. And obtaining a final body fat rate result of the accurate measurement mode. According to the method, the body fat rate can be accurately measured, and the accuracy and reliability of a measurement result are improved.

According to an embodiment, a method includes adjusting a reference generator into a first configuration based on a temporary trim value resulting, in a first reference voltage and a first reference current being generated for a first memory. The method further includes performing an integrity check on an initial set of data downloaded from the first memory based on the first reference voltage and the first reference current. The initial set of data includes a first trim value. The method further includes downloading contents from the first memory into a second memory in response to a successful integrity check after adjusting the reference generator into a second configuration. In the second configuration, the reference generator generates a second reference voltage and a second reference current for the first memory. The reference generator is adjusted by the first trim value in response to a successful integrity check.

The invention relates to a lightning arrester leakage ammeter self-calibration method and system, and the method comprises the following steps: disconnecting a main leakage ammeter from an external main measurement loop, and closing a calibration loop of a redundancy calibration sensor and a reference current source after a preset time is delayed; controlling a reference current source to output standard signals with different current magnitudes, collecting the standard signals by using a redundancy calibration sensor, extracting effective signal components, and performing environment compensation; iteratively calculating a relative error between the effective signal component and the standard signal, if the relative error is less than or equal to a second threshold value, updating a calibration coefficient according to a ratio of the standard signal to the effective signal component, and correcting a measurement result of the main leakage ammeter based on the calibration coefficient; if the relative error is greater than a third threshold value, locking output and uploading fault information; otherwise, recording as one exception, and carrying out maintenance early warning according to the number of exceptions. Compared with the prior art, the self-checking and real-time calibration of the leakage ammeter of the lightning arrester can be completed on the premise of not influencing the operation of power equipment.

The invention relates to the technical field of electromagnetic compatibility testing, and provides a current-based magnetic field radiation emission limit value cutting method and device and electronic equipment. Comprising the steps of obtaining working current parameters of tested equipment; determining a basic limit value of magnetic field radiation emission, obtaining a working current of the tested equipment when the magnetic field radiation is the basic limit value, and taking the working current as a reference current threshold value; when the working current parameter is greater than the reference current threshold value, calculating the clipping amount of the magnetic field radiation emission limit value based on the ratio of the working current parameter to the reference current threshold value; and cutting the basic limit value according to the cutting amount to obtain the magnetic field radiation emission limit value of the tested equipment. The limit value is compatible with the existing electromagnetic compatibility national military standard magnetic field radiation emission limit value, so that the electromagnetic compatibility test assessment of the large-current equipment can be evaluated more reasonably and accurately, and the method has high engineering application value.

A sigma-delta analog-to-digital converter is provided that includes an initial continuous-time integration stage having a variable input resistor and an integration capacitor. A switched-capacitor circuit charges and discharges a replica capacitor to a reference voltage to generate a bias current. A SAR-based tuning circuit includes a variable tuning resistor that generates a tuning voltage while conducting a mirrored version of the bias current. A resistance of the variable input resistor is adjusted responsive to a tuning code from the SAR-based tuning circuit.

The invention provides a dynamic impedance matching charger based on battery aging, a method, electronic equipment and a medium. The charger comprises a master control unit, and a battery state monitoring module, an aging grade evaluation module, a dynamic charging control module, a battery cell balancing module, an optimization control module and an anti-interference module which are connected with the master control unit to cooperatively realize charging closed-loop control. The battery state monitoring module injects a preset frequency alternating current signal and outputs an impedance parameter, a charge state and a temperature parameter; the aging grade evaluation module outputs a battery aging grade in combination with a preset model; the dynamic charging control module is matched with an adaptive charging mode instruction; the battery cell balancing module calculates the battery cell impedance difference, and balancing operation is executed if the battery cell impedance difference reaches the standard; the optimization control module generates an optimized current instruction through a preset algorithm according to the related parameters, and superposes the optimized current instruction to the reference current; the anti-interference module improves the signal-to-noise ratio of collected signals to a preset standard through isolation and shielding design.

The invention discloses a current distribution regulation and control voltage balance SOC optimization method, and the method comprises the specific steps: determining the type of a balance strategy according to the SOC difference between battery modules; according to the determined equalization strategy, the total cluster current of the system is distributed to each module according to SOC, and module reference current is generated and calculated; and finally, converting the module reference current into a bus voltage reference instruction, and controlling each module to track a voltage target to realize current distribution. According to the current distribution regulation and control voltage balance SOC optimization method provided by the invention, the target current is calculated, and then the current reference is converted into the bus voltage reference, so that the dynamic response speed and stability of the DC bus voltage are improved.

An isolated DC-DC converter is provided, including a full-bridge switching stage, a resonant network, a transformer, an output stage, an output stage, an error amplifier, a feedforward controller, a charge sensor and a switch controller. The output stage generates an output signal, wherein the output signal is an output voltage or output current. The error amplifier generates an error signal based on the output signal and a reference signal, wherein the reference signal is a reference voltage or reference current. The feedforward controller senses an input voltage of the full bridge switching stage, and generates a feedforward control signal based on the sensed signal. The charge sensor generates at least one charge sensing signal. The switch controller generates and provides switch control signals to the plurality of active switches in charge control mode based on at least the error signal, the feedforward control signal and the charge sensing signal.

The invention relates to a radiation hardening band-gap reference current source circuit, and belongs to the technical field of radiation resistance of integrated circuits. Over-degradation of the threshold in a high total dose environment is focused on a circuit design level, closed-loop adjustment of the threshold voltage is realized through total dose detection and a dynamic compensation mechanism, and reliability and stability of the circuit in the high dose radiation environment are remarkably improved. Through the embedded logic of the reinforced circuit, the anti-radiation performance of the reinforced circuit is ensured, and the reinforced circuit can work normally in a high-dose environment. Reliable triggering and system self-recovery in a full dose range can be realized through a bias closed-loop design provided by a reference circuit for a reinforced loop, and the application requirements of extreme environments such as spaceflight and nuclear energy are met. The method has the advantages of anti-radiation effect, good dynamic nature, strong transportability and the like.

The invention discloses a balance bridge arm control method and device of a three-phase inverter. The balance bridge arm control method comprises the following steps: acquiring an upper bus voltage, a lower bus voltage and an actual current of an inductor in real time; calculating a voltage difference value between the upper bus voltage and the lower bus voltage, and performing low-pass filtering processing on the voltage difference value; determining capacitance current of an upper bus capacitor and / or a lower bus capacitor according to the upper bus voltage and / or the lower bus voltage, and performing low-pass filtering processing on the capacitance current; calculating the reference current of the inductor according to the voltage difference value after the low-pass filtering processing and the capacitance current after the low-pass filtering processing; and controlling two switch tubes of the balance bridge arm according to the actual current and the reference current of the inductor. According to the technical scheme, the balance bridge arm can control potential balance of the neutral point of the direct-current bus and can restrain voltage ripples of a bus capacitor.

The invention relates to the technical field of digital playing equipment, and provides a lossless control method for the volume of a digital player and the digital player. The method comprises the following steps of: after receiving a target volume parameter, executing dynamic multiplying power oversampling and high-order noise shaping on an input digital audio signal, and injecting preset jitter to suppress in-band quantization distortion so as to generate an optimized digital audio stream; meanwhile, a high-resolution digital reference current control instruction corresponding to the target volume is independently generated, output of a reference current source is adjusted according to the high-resolution digital reference current control instruction, and a high-precision differential current signal is obtained by combining nonlinearity, temperature excursion and quantization errors of a closed-loop feedback compensation device through a multi-bit current segmentation network; performing bias stabilization processing on the signal, and converting the signal into a differential voltage signal for suppressing common-mode noise through a precision differential resistance network; and finally, low-distortion differential analog audio signals capable of directly driving a load are output through low-distortion gain, impedance conversion and power driving, so that low-distortion, high-signal-to-noise-ratio and wide-dynamic-range output in a full-volume range is realized.

The invention provides a current detection circuit, a chip and a control system, and relates to the technical field of power management chips, the circuit comprises a reference current generation circuit, a differential signal conversion circuit and a voltage conversion circuit; the reference current generating circuit is used for generating reference current; the differential signal conversion circuit is used for performing differential operation on the accessed first input voltage and second input voltage to obtain differential voltage and converting the differential voltage into differential current; the current acquisition module is also used for acquiring a first current based on the reference current, and the first current is the difference between the reference current and the differential current; and the voltage conversion circuit is used for converting the first current into a voltage signal to obtain an output voltage. By converting the differential voltage into the differential current, the limitation of the current detection circuit on the condition that the input signal is relatively high common-mode voltage can be overcome, and the problem that the output offset voltage is relatively high when the common-mode voltage of the input signal is relatively high is reduced, so that the output offset voltage is reduced.

The invention discloses a control method and system for a hybrid active power filter and a storage medium, and the method comprises the steps: taking an inductance value and a capacitance value of a passive power filter as the input of a particle swarm optimization method, and obtaining an optimized inductance value and an optimized capacitance value; when the harmonic wave frequency filtered by the passive power filter is the same as the harmonic wave frequency filtered by the active power filter, the active power filter is equivalent to a virtual LC filter with the same structure as the passive power filter; otherwise, enabling the active power filter to be equivalent to a virtual resistor; obtaining a harmonic compensation current reference value of the active power filter; and superposing the harmonic compensation current reference value and the reactive compensation current reference value to obtain the total reference current of the active power filter, taking the total reference current as the input of a proportional resonance controller, and performing PWM modulation on the output of the proportional resonance controller. According to the invention, the harmonic current amplification problem of the passive power filter is eliminated, and the stability and compensation performance of a power system are improved.

The invention discloses an on-line monitoring and compensating method and system for the thickness of an electroplated layer of an automobile part based on current self-adaptive adjustment, and relates to the technical field of automation and intelligent control. Correcting the original thickness data according to the deviation degree between the current temperature and the real-time PH value and the preset reference data to obtain the real coating thickness of each subarea under the reference condition, judging that the real coating thickness reaches the standard according to the preset trigger compensation condition, if the real coating thickness reaches the standard, continuously monitoring on line, and if the real coating thickness does not reach the standard, determining the current increment of each subarea. According to the method, the current increment is compensated according to the influence of the PH value deviation, the reference current is adjusted, the final adjustment current is output, and the plating thickness of each subarea is dynamically compensated, so that the multi-dimensional process variable can be sensed, and the plating thickness of each subarea can be dynamically compensated by dynamically adjusting the current and compensating the thickness deviation caused by parameter fluctuation. And finally, the whole-course accurate control of the coating thickness of the automobile part is realized.

The invention relates to the field of three-level inverters, and particularly discloses a model-free strong-robustness predictive control method and system for a three-level SNPC inverter, and the method comprises the steps: carrying out the real-time sampling and coordinate transformation of the inverter, and obtaining the current and voltage components under a two-phase static coordinate system; establishing a hyper-local model, enabling the system parameter deviation and the external disturbance to be uniformly equivalent to lumped disturbance, and designing a full-order sliding-mode observer for real-time estimation; calculating a reference voltage vector based on the disturbance estimation value and the extrapolated reference current; and an optimal double-vector combination is selected through space vector optimization, action time is solved, redundant small vectors are selected according to midpoint voltage deviation, and PWM driving signals are generated. According to the method, excellent current tracking performance and low harmonic distortion can still be kept under the conditions of parameter mismatch and working condition change, meanwhile, neutral-point potential balance on the direct-current side is achieved, and the method has the advantages of being small in calculation amount, high in robustness, easy to achieve in engineering and the like.

The invention discloses a low-temperature-drift band-gap reference source circuit. The low-temperature-drift band-gap reference source circuit comprises a starting circuit, a PTAT current generating circuit, a CTAT current generating circuit and an output circuit. The PTAT current generation circuit is used for generating positive temperature coefficient current, and adopts a power supply voltage isolation structure consisting of two PMOS (P-channel Metal Oxide Semiconductor) tubes and two NMOS (N-channel Metal Oxide Semiconductor) tubes to isolate the interference of power supply voltage; the CTAT current generating circuit is used for generating a negative temperature coefficient current and adopts a clamping structure consisting of two triodes, so that the CTAT current generating circuit is not influenced by a power supply voltage; and the output circuit is used for outputting low-temperature-drift reference current and / or voltage. An operational amplifier clamping structure is not used, the complex structure of an integrated operational amplifier is omitted, the circuit structure is simplified, the area and power consumption are reduced, the influence of offset voltage of the integrated operational amplifier can be avoided, and practicability is high. In addition, the reference circuit further comprises a temperature compensation circuit, temperature high-order compensation is carried out through a feedback network formed by two resistors, and the reference current and the reference voltage are more accurate.

In an example, a system includes an amplifier having an output stage configured to provide an output voltage, where the output stage includes a p-channel transistor and an n-channel transistor. The system includes a sense transistor having a gate coupled to a gate of the p-channel transistor, where the sense transistor is configured to sense a current of the p-channel transistor and produce a sense current. The system includes a current mirror coupled to the sense transistor and configured to provide the sense current to a gate of a control transistor, the control transistor having a source coupled to the gate of the p-channel transistor. The system includes a reference current source coupled to the control transistor and configured to provide a reference current. The control transistor is configured to adjust a gate current provided to the p-channel transistor based on comparing the sense current to the reference current.

The embodiment of the invention provides a control circuit of a voltage converter, a chip and electronic equipment. The control circuit of the voltage converter comprises a reference current generation circuit and a driving control circuit, the reference current generation circuit is configured to generate a minimum reference current according to the bias current source under a light load condition, generate an enhanced current according to a differential voltage of a reference voltage and a feedback voltage under a heavy load condition, and generate a target reference current in combination with the minimum reference current, and the target reference current is greater than the minimum reference current; the driving control circuit is configured to control the second power switch tube to be turned off when the inductance sampling current rises to a high-order comparison threshold value, the inductance sampling current is the sampling current of the inductance current of the voltage converter, and the high-order comparison threshold value is the sum of the minimum reference current and a preset current hysteresis window; and when the inductance sampling current is reduced to the target reference current, the second power switch tube is controlled to be conducted. The circuit realizes light-load ultra-low power consumption, heavy-load transient response and stable voltage regulation and control.

The invention discloses a high-speed brushless direct current motor torque ripple suppression method, device and equipment and a storage medium, and belongs to the technical field of motor control. The method comprises three steps of adaptive harmonic suppression processing, phase compensation angle calculation and dynamic phase compensation. According to the invention, the center frequency is dynamically adjusted through the adaptive harmonic wave notch filter, the dominant harmonic component is inhibited in real time, and in combination with cascade delay signal elimination, 6k fixed subharmonics are filtered through the CDSC filter, so that a fundamental wave current signal is obtained; park transformation is carried out on the fundamental wave current based on an FOC algorithm, a PI controller is utilized to generate a phase delay angle according to a d-axis current error, and then a reference current compensation module dynamically compensates a current reference value to ensure phase synchronization of phase current and back electromotive force. Compared with the prior art, additional hardware equipment is not needed, and the torque ripple of the BLDC is reduced.

The invention discloses a current distortion suppression method and device for an N-phase AC-AC conversion system, and relates to the field of voltage conversion control, and the method comprises the steps: determining the ideal sine reference current of an xth phase, obtaining the actual input current of the xth phase in a current control period and the actual output current of the xth phase corresponding to an inductive load, and determining the current variation of the xth phase; and determining a difference value between the ideal sine reference current of the x-th phase and the actual input current as a real-time current distortion error signal of the x-th phase, further determining a compensation duty ratio of the x-th phase for suppressing current distortion by combining a preset duty ratio compensation strategy, and further determining a target duty ratio of the x-th phase as a target PWM signal. According to the scheme, the input current of each phase can be monitored, inductive load disturbance can be responded, the compensation duty ratio of the x-th phase used for restraining current distortion can be dynamically adjusted so as to determine the target duty ratio, the current distortion of the input current can be effectively restrained, and the input current can follow ideal sine reference current.

The invention discloses a power distribution control method suitable for a wind storage combined system, and the method comprises the steps: obtaining a power balance parameter, the charge state of a battery and the charge state of a supercapacitor according to the system operation parameters of the wind storage combined system in the operation process, and obtaining the charge state of the supercapacitor according to the power balance parameter; the method comprises the following steps: determining a power balance relationship of the wind storage combined system, further determining an operation mode of the wind storage combined system according to an operation mode selected by the wind storage combined system, obtaining reference currents of a battery and a supercapacitor in a corresponding operation mode, and determining the power balance of the wind storage combined system according to the reference currents of the battery and the supercapacitor. And performing power distribution control on the wind storage combined system according to a preset power distribution control strategy. The residual electric quantity of the super capacitor is introduced as a new constraint, and the residual electric quantity and the residual electric quantity of the battery system jointly determine power distribution control, so that the hybrid energy storage system is protected while stable operation of the wind power generation system is ensured.

The invention belongs to the technical field of grid-connected inverter harmonic analysis, and particularly discloses a grid-connected inverter harmonic closed-loop transmission analysis method and system considering broadband coupling. The method comprises the following steps: respectively establishing a harmonic component transfer function of each module; based on the harmonic component transfer function of the sampling module, calculating to obtain harmonic active power and harmonic reactive power input to the power outer loop control module; based on a harmonic component transfer function of the power outer loop control module, calculating to obtain a harmonic current component in a reference current signal output by a power outer loop; based on a harmonic component transfer function of a current inner loop control module, obtaining a three-phase modulation voltage harmonic component and an inverter port voltage harmonic component through coordinate inverse transformation; on the basis of the inverter port voltage harmonic component, a main circuit harmonic transfer equation is combined, and a grid-connected point harmonic current component is obtained through calculation; the method overcomes the defects that a traditional analysis method cannot consider the control of a whole loop by a closed loop, and the broadband coupling is insufficiently considered.

The invention relates to a ripple suppression PI loop control method, a storage medium and a device, and the method comprises the steps: extracting a frequency doubling component in an inversion power flow based on the filtering and Park transformation of a secondary second-order generalized integrator, determining the reverse compensation amount at each moment based on the frequency doubling component and a battery connected with a DC circuit, and carrying out the control of the ripple suppression PI loop. And finally, based on the sum of the reverse compensation amount at each moment and an original reference current value output by a voltage outer ring on each bridge arm of the DC circuit, determining a current reference instantaneous value after reverse compensation of a current inner ring input to each bridge arm at each moment. According to the method, a pure frequency doubling component with very high dynamic performance and related to ripple information is obtained, then according to the extracted frequency doubling component and battery parameters, the reverse compensation amount used for suppressing ripple in loop control is obtained, and then the reverse compensation amount is accumulated to a voltage outer loop, so that the ripple information is suppressed. Therefore, ripple suppression with good dynamic performance and good suppression effect in loop control is realized.

The invention discloses a negative voltage clamping circuit and method. The negative voltage clamping circuit comprises a current mirroring module which is used for providing a reference current Iref and generating a corresponding reference current according to a preset current proportion mirroring; the voltage detection module is connected with the current mirror module and the negative voltage input end of the chip and is used for detecting the voltage VS of the negative voltage input end; and the clamping control module is connected with the current mirroring module and the voltage detection module, and the clamping control module is configured to be switched on when the voltage VS of the negative voltage input end exceeds a preset clamping threshold value and clamp the voltage VS of the negative voltage input end within a preset range. According to the negative voltage clamping circuit, the change of the negative voltage input end can be monitored in real time, it is ensured that the clamping control module responds rapidly when the voltage exceeds a threshold value, the negative voltage is limited within a safe range, circuit damage or performance reduction caused by too low voltage is avoided, and therefore the stability and reliability of a chip are improved.

The invention discloses a fault detector of an accelerator switch assembly and a detection method thereof. The fault detector comprises at least one detection circuit. Each detection circuit comprises three constant current sources with equal output current, a first resistor and two voltage comparators; the input ends of the three constant current sources are used for inputting reference current; the output end of the first constant current source and the output end of the second constant current source are used for being connected with a normally-closed contact and a normally-open contact of an electric switch to be tested respectively, and the output end of the third constant current source is grounded through a first resistor. The common contact of the to-be-tested switch is grounded. Two input ends of the first voltage comparator are respectively connected with the output end of the first constant current source and the output end of the third constant current source; two input ends of the second voltage comparator are respectively connected with the output end of the second constant current source and the output end of the third constant current source; the output ends of the first voltage comparator and the second voltage comparator are used for outputting detection signals. According to the scheme, the detection efficiency and the detection precision of fault detection of the accelerator switch assembly can be greatly improved.