1095 results about "Voltage ratio" patented technology

The invention belongs to the technical field of large-depth ground-to-air electromagnetic detection, and particularly relates to a light-weight high-power ground-to-air electromagnetic detection power supply system and method and a high-power vehicle-mounted power supply. Two paths of lithium battery units connected in parallel are adopted to provide short-time high-power emission current for a transmitter; the controller is used for acquiring a detection task set by the transmitter and setting a reference voltage according to the detection task; the voltage acquisition module is used for acquiring a direct-current bus voltage and comparing the direct-current bus voltage with a reference voltage to obtain a current modulation signal; and the controller is also used for acquiring the output current of each path of lithium battery unit and outputting a control signal according to the current modulation signal to compensate the output current of each path of lithium battery unit. According to the invention, the stability of a power supply system is realized when different instantaneous high-power outputs in a detection task in a high-power ground-air electromagnetic detection system are realized. When the output voltage and the sudden increase or decrease of the load current are adjusted as required, the stable output of the power supply voltage is realized.

The invention discloses an intelligent silicon controlled rectifier voltage conversion circuit, which relates to the technical field of voltage conversion, and comprises a photovoltaic module, a micro-control module, a power regulation module, a first voltage threshold, a second voltage threshold, a second voltage threshold, a third voltage threshold, a fourth voltage threshold, a fifth voltage threshold and a sixth voltage threshold, when the converted electric energy is larger than a first voltage threshold value, the access control module transmits the electric energy output by power regulation, superposes the electric energy output by double-path electric energy coupling and stores the superposed electric energy by the energy storage module, and when the converted electric energy is smaller than the first voltage threshold value and larger than a second voltage threshold value, the access control module outputs the superposed electric energy. And when the voltage is smaller than a second voltage threshold value, electric energy coupling is stopped, the power regulation module is controlled to carry out power regulation on the electric energy released by the energy storage module, and power is supplied to the output module. According to the intelligent silicon controlled voltage conversion circuit, the utilization rate of photovoltaic electric energy can be improved, and the voltage gain and the power supply efficiency are improved.

Disclosed in the present invention are a current lookup table-based permanent magnet synchronous motor wide voltage range control method and a medium. The method comprises: by means of a full-speed domain current calibration method, obtaining a rotating speed-torque two-dimensional lookup table under a rated bus voltage; on the basis of the lookup table, multiplying a given rotating speed with a front-and-rear amplitude limiting voltage ratio to achieve wide voltage range control; and performing friction torque compensation and sampling delay compensation of a three-phase current at different rotating speeds. The present invention takes into account bus voltage fluctuation under the complex working condition of an electric vehicle, and multiplies the given rotating speed with a variable voltage coefficient ku to obtain an input rotating speed of an input current lookup table, such that precise current control of the permanent magnet synchronous motor under different bus voltage working conditions can be achieved, thereby avoiding the complex and tedious process of re-calibration of the current lookup table under different bus voltages; the present invention also takes into account friction torque compensation and phase current sampling delay compensation at different rotating speeds, wherein the friction torque compensation can be achieved by directly adding a friction torque error into a given torque signal in real time.

The invention discloses a photovoltaic inverter direct current component detection circuit, which relates to the technical field of photovoltaic detection, and comprises a photovoltaic inversion module used for photovoltaic conversion and inversion; the intelligent control module is used for signal receiving and module control; the detection control module is used for transmitting the input voltage and the output voltage of a switching element in the working of the upper half bridge or the lower half bridge of the photovoltaic inversion module; the first voltage drop module is used for calculating the voltage drop of an upper half-bridge switch element of the photovoltaic inversion module; the second voltage drop module is used for calculating the voltage drop of a lower half-bridge switch element of the photovoltaic inversion module; the voltage drop comparison module is used for voltage comparison; the output module is used for filtering and outputting electric energy; the component detection module is used for extracting the direct current signal and performing two-stage amplification; and the state judgment module is used for detecting positive and negative states of the direct current signal and carrying out voltage comparison. The photovoltaic inverter direct current component detection circuit can quickly and effectively detect the direct current component and automatically detect the generation reason of the direct current component.

The disclosure relates to an electronic circuit to verify the integrity of a switch. The circuit comprises a voltage comparator and decoupling switch. The decoupling switch configured receive the driving signal having a first logic value to enable the monitoring of the comparison voltage and is configured to receive the monitoring enable signal having a first logic value to command the opening of the decoupling switch. The electronic circuit is configured to generate the output monitoring signal having a first logic value in an event that the switch is an open circuit and having a second logic value in an event that the switch is a short circuit.

The invention discloses a power supply intelligent management control system, and relates to the technical field of power supply management, and the system comprises a power supply processing module which is used for accessing and transmitting AC electric energy and carrying out voltage reduction, rectification filtering, inversion and transformation processing; the current sampling module is used for current sampling control, signal conversion and amplification filtering; the voltage comparison module is used for setting an overvoltage threshold value, comparing the overvoltage threshold value with the voltage and detecting the shunting degree; the power taking processing module is used for converting, amplifying and filtering the shunted sampling signals, and rectifying and storing the shunted sampling signals; the intelligent control module is used for signal receiving and module control; the electric energy adjusting module is used for adjusting voltage; and the output processing module is used for outputting filtering and electric energy superposition processing and supplying power to the output module. The intelligent management control system for the power supply can provide voltage stabilization and perform shunt power taking work and electric energy processing when a sampled signal is greater than a set threshold value, so that the safety of the system can be improved, and energy-saving power supply control can also be performed.

The invention relates to a CVT error evaluation method and device, error evaluation equipment and a storage medium, and belongs to the technical field of mutual inductor error recognized.The CVT error evaluation method comprises the steps that a first data set is restored to a primary voltage level based on voltage proportionality coefficients of multiple CVTs to obtain a second data set, and a difference matrix is constructed based on the second data set; establishing a likelihood function based on the difference matrix, and converting the likelihood function into a posterior probability density function based on a Bayesian formula; extracting data corresponding to a preset number of CVTs from the second data set to construct a third data set, and determining a prior probability density based on the third data set; and based on a multi-chain MCMC algorithm fused with plant rhizome growth and a posterior probability density function, determining error values corresponding to a plurality of CVTs when the posterior probability density is maximum. According to the method, the accuracy of CVT error evaluation is effectively ensured, and meanwhile, the error evaluation efficiency is also improved.

The invention discloses a three-phase-shift control method and system of a DAB converter, and relates to the technical field of converter control. Comprising the steps that a primary side voltage steady-state value, a secondary side voltage steady-state value and an expected value X * of a high-frequency transformer Tr in a target DAB converter and a sampling value X fed back by the output end of the target DAB converter are acquired; performing proportional integral on a difference value between the sampling value X and the expected value X * to obtain unit transmission power Y; determining the voltage ratio # imgabs0 # of the two sides of the inductor, and determining a first phase shift angle D1, a second phase shift angle D2 and a third phase shift angle D3 according to the unit transmission power Y and the voltage ratio # imgabs1 # of the two sides of the inductor; and performing signal modulation through the first phase shift angle D1, the second phase shift angle D2, the third phase shift angle D3 and the switching frequency fs to obtain a driving signal to control the target DAB converter. Design and implementation of a control strategy are greatly simplified, and the control method is clear in mechanism and easy to control.

The invention discloses a mobile power supply with an intelligent electric energy management function, and relates to the technical field of mobile power supplies, and the mobile power supply comprises a photovoltaic detection control module which is used for photovoltaic conversion, voltage sampling and voltage comparison; the energy storage and discharge module is used for storing energy and discharging; the intelligent control module is used for signal receiving and module control; the coupling boosting module is used for power regulation, coupling regulation, rectification filtering and output voltage superposition work; the output control module is used for carrying out coupling adjustment and rectification filtering processing; the first output module is used for receiving the electric energy output by the output control module; and the second output module and the third output module are used for receiving the electric energy output by the coupling boosting module. The mobile power supply with the intelligent electric energy management function can provide multi-path power supply, the step-up ratio, the voltage gain and the power supply efficiency are improved, when only the first output module supplies power, power can be supplied to the energy storage discharging module through the coupling step-up module, and the utilization rate of electric energy is improved.

Systems and methods for capacitance tuning of devices in quantum processors are described. One implementation is a quantum processor with a first current path having a first loop, a Josephson structure with at least one Josephson junction interrupting the first loop, a second current path connected to the first current path, and a flux bias. The second current path has a first node spaced from a second node, a capacitor separating the first node and the second node, and a voltage gain tuner, the voltage gain tuner being inductively coupled to the inductance of the first current path. The flux bias is coupled to the voltage gain tuner and controls the voltage gain tuner to vary a voltage ratio between the first node and the second node, thereby influencing the capacitance of the first current path.

The invention provides a voltage-controlled oscillator and a phase-locked loop circuit, and relates to the technical field of integrated circuits. The voltage-controlled oscillator comprises a voltage-controlled circuit, a current copying circuit and an oscillating circuit, the voltage control circuit comprises a comparison unit, a switch unit and a voltage acquisition unit. A first input end of the comparison unit is used for receiving input control voltage, a second input end of the comparison unit is grounded through the voltage acquisition unit, an output end of the comparison unit is connected with a control end of the switch unit, one end of the switch unit is grounded through the voltage acquisition unit, and the other end of the switch unit is connected with an input end of the current copying circuit; the output end of the current copying circuit is connected with the input end of the oscillation circuit, and the output end of the oscillation circuit is used for outputting a control signal with target oscillation frequency. According to the voltage-controlled oscillator, the linearity of voltage control current is optimized, and meanwhile, the working voltage range of the voltage-controlled oscillator is expanded.

The invention discloses a photovoltaic direct current conversion method, a storage medium and computer equipment, and the method comprises the steps: obtaining the duty ratio of a first pulse width modulation signal through a voltage proportional-integral algorithm when an actual output voltage is adjusted to a preset target output voltage; through a maximum power point tracking control algorithm and the actual output power, obtaining a control output voltage when the photovoltaic power generation system works at the maximum photovoltaic power point and a duty ratio of a second pulse width modulation signal when the photovoltaic power generation system is adjusted to a preset target output voltage; based on the target pulse width modulation signal corresponding to the minimum duty ratio, the on-off states of the first switching device and the second switching device are controlled at the same time until the direct current of the preset target output voltage is obtained. By combining the maximum power point tracking control and the voltage proportional integral algorithm, the first switching device and the second switching device are controlled at the same time, the structure is simplified, and meanwhile direct current can be directly output.

The invention relates to the technical field of electric power measurement online monitoring. The invention discloses a CVT error calculation method and device based on a virtual standard algorithm and a storage medium, and the method comprises the steps: collecting the voltage original waveform data of a plurality of CVTs in a homologous state in real time, and calculating the amplitude and phase of the data; constructing a steady-state data set; calculating an initial virtual standard; calculating an initial voltage ratio difference value and an initial voltage angle difference value; inverting a real-time virtual standard; calculating an overall virtual standard; calculating an instantaneous voltage ratio difference value and an instantaneous voltage angle difference value; and outputting a CVT state judgment result. According to the method, the accuracy of CVT error calculation is effectively improved, the state of the mutual inductor can be more accurately judged, and a powerful guarantee is provided for stable operation of a power system.

Controller and method for a switching power supply. For example, a controller for a switching power supply includes: a first terminal configured to receive a feedback voltage representing an output voltage associated with a secondary winding of the switching power supply; a second terminal configured to output a drive voltage to a first transistor associated with a primary winding coupled to the secondary winding of the switching power supply; a comparator configured to receive the feedback voltage and a predetermined feedback threshold and generate a comparison signal based at least in part on the feedback voltage and the predetermined feedback threshold; a pulse-width detector configured to detect a pulse width of the drive voltage during a first switching cycle, compare the detected pulse width with a predetermined time threshold, and generate a detection signal based at least in part on the detected pulse width and the predetermined time threshold.

The invention discloses an inverter turn-off protection circuit, which comprises a bus voltage sampling circuit, a current sampling module, a multiplier, a threshold voltage comparison circuit and a gate turn-off circuit, and is characterized in that the bus voltage sampling circuit is used for sampling an inverter bus voltage to obtain a sampling voltage; the current sampling module is used for sampling phase current output by the alternating current side of the inverter to obtain sampling current; the multiplier is used for receiving the sampling voltage and the sampling current and carrying out multiplication operation to obtain instantaneous power; the threshold voltage comparison circuit is used for comparing the instantaneous power with a threshold to obtain a level signal; and the gate pole turn-off circuit is used for controlling the turn-off of a gate pole turn-off switch tube according to the level signal output by the threshold voltage comparison circuit so as to control the turn-off of a power tube of the inverter. The inverter turn-off protection circuit operates independently, is not affected by an MCU system, is low in cost and high in response speed, and greatly improves function safety.

The present application discloses an electrostatic chuck power circuit current detection apparatus, and a semiconductor process device. The apparatus comprises: a sampling resistor (R), the sampling resistor (R) being connected in series to an output end of an electrostatic chuck power supply (10); an operational amplifier (12), a positive input end of the operational amplifier (12) being connected to an input end of the sampling resistor (R), a negative input end of the operational amplifier (12) being connected to an output end of the sampling resistor (R), a reference potential end of the operational amplifier (R) being used to input a first reference voltage (VDD1-), an absolute voltage difference between the first reference voltage (VDD1-) and an output voltage (HV+) of the output end of the electrostatic chuck power supply (10) being less than a withstand voltage difference of the operational amplifier (12), a power supply end of the operational amplifier (12) being used to input a first supply voltage (VDD1+), the first supply voltage (VDD1+) being higher than the first reference voltage (VDD1-) by a preset first voltage value, and an output end of the operational amplifier (12) being used to output a voltage signal proportional to a circuit current. The present application uses a non-high-voltage isolated ordinary operational amplifier, which reduces costs and improves the accuracy of current detection.

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.

The invention provides an output negative voltage protection circuit applied to an N-type power device linear voltage regulator. The output negative voltage protection circuit comprises a voltage comparator, a current comparator, an error amplifier, a buffer driver, a power device MP, a resistor R1, a resistor R2, a resistor Rload and a capacitor Cout. The method comprises the following steps: acquiring a voltage difference between an S-pole output voltage Vout of a power device MP and a reference voltage Vos through a voltage comparator, converting the voltage difference into a current signal Ieg, and comparing the current signal Ieg with a reference current Ios through a current comparator to generate a current signal Ilim; adjusting the output of an error amplifier according to the current signal Ilim, and dynamically adjusting the G pole voltage Vgate of the power device MP; when the output voltage Vout is lower than the reference voltage Vos, the G pole voltage Vgate is pulled down to turn off the power device MP through the current signal Ilim, and protection of the power device MP is achieved.

To provide a current detection circuit capable of applying a hysteresis to a comparing action of an abnormal detection comparator whose object of detection is a current.SOLUTION: A current detection circuit includes a current-to-voltage conversion element that converts an object-of-detection current to a voltage, a comparator that inputs a detection voltage, which results from the conversion, through one of input terminals and inputs a comparison reference voltage through the other input terminal, and a hysteresis application circuit that applies a hysteresis to a comparing action of the comparator. The hysteresis application circuit includes a current source circuit that generates a current of a predetermined magnitude which is added to or subtracted from the current that is an object of detection, and a switch element connected in series with the current source circuit. When the switch element is turned on or off with an output of the comparator, a current flowing into the current-to-voltage conversion element augments or diminishes. Accordingly, the detection voltage varies relatively to the comparison reference voltage. Thus, a hysteresis is applied to the comparing action of the comparator.SELECTED DRAWING: Figure 1

The invention relates to the technical field of intelligent power grid characteristic current communication, and discloses an over-temperature protection circuit, which is connected with a characteristic current generation circuit and a controller, and comprises a temperature acquisition module which is arranged in a preset range of a field effect transistor and generates structural change according to the temperature change of the field effect transistor, a detection voltage signal is output based on a voltage drop signal formed by the structure change; the voltage comparison module is connected with the temperature acquisition module, receives the detection voltage signal, and outputs a turn-off control signal when detecting that the detection voltage signal is smaller than a preset voltage signal; and the switch control module is respectively connected with the voltage comparison module and the controller, and is closed after receiving the turn-off control signal so as to stop transmitting the pulse width modulation signal sent by the controller to the characteristic current generation circuit, so that the field effect transistor stops working. The problem that the detection cost is high through a thermistor is solved.

The embodiment of the invention provides a tuning voltage calibration device, a phase-locked loop and a tuning voltage calibration method, the device comprises a voltage comparison module and a calibration module, the output end of the voltage comparison module is connected with the input end of the calibration module, the voltage comparison module is connected with the phase-locked loop, and the phase-locked loop is connected with the calibration module. The comparator is used for comparing a reference voltage with a preset value with a tuning voltage in a phase-locked loop through a hysteresis comparator to generate an error signal; and the calibration module is used for determining the calibration direction of the tuning voltage according to the error signal, calibrating the tuning voltage based on the calibration direction, and stopping calibration of the tuning voltage under the condition that the error signal is continuously overturned. According to the embodiment of the invention, one hysteresis comparator is adopted, the implementation mode is simpler, the controllable range of the tuning voltage is enlarged, calibration is stopped when the tuning voltage is stable, power consumption generated by continuous calibration is avoided, and the problems that the tuning voltage range of double comparators is limited and continuous power consumption overhead exists in the prior art can be solved.

The utility model discloses a TBU circuit, which comprises an N-channel depletion type MOSFET or an N-channel JFET, a P-channel depletion type MOSFET and a current limiting element, the source electrode of the N-channel depletion type MOSFET or the N-channel JFET is connected with the source electrode of the P-channel depletion type MOSFET, one end of the current limiting element is connected with the grid electrode of the N-channel depletion type MOSFET or the N-channel JFET, and the other end of the current limiting element is connected with the drain electrode of the P-channel depletion type MOSFET; a first voltage stabilizing branch is connected in parallel between the grid electrode and the source electrode of the N-channel depletion type MOSFET or the N-channel JFET, and a second voltage stabilizing branch is connected in parallel between the source electrode and the grid electrode of the P-channel depletion type MOSFET. According to the utility model, the voltage proportion of the N-channel depletion type MOSFET or the N-channel JFET and the P-channel depletion type MOSFET can be adjusted, and the withstand voltage value of the N-channel depletion type MOSFET or the N-channel JFET and the P-channel depletion type MOSFET can be designed flexibly.

The utility model provides a protection circuit and a vehicle power utilization system, and relates to the technical field of electronic circuits. The protection circuit comprises a voltage clamping unit, a voltage comparison unit and a first switch unit, wherein one end of the voltage clamping unit is connected with a power supply input end, the other end of the voltage clamping unit is connected with a first input end of the voltage comparison unit, and the voltage clamping unit is used for clamping the voltage of the power supply input end to a first voltage and outputting the first voltage to the voltage comparison unit; the second input end of the voltage comparison unit is connected with a preset voltage reference point, the output end of the voltage comparison unit is connected with the control end of the first switch unit, and the voltage comparison unit is used for turning off the first switch unit when the first voltage is larger than the voltage input by the preset voltage reference point; the first end of the first switch unit is connected with the power input end, and the second end of the first switch unit is connected with the voltage output end. Therefore, when a load throwing event occurs, high voltage is clamped, overvoltage protection is realized, and damage to electric equipment is avoided.

The invention discloses a CAN bus activity detection and wake-up circuit and method, and belongs to the technical field of CAN bus communication, the CAN bus activity detection and wake-up circuit comprises a CAN bus interface circuit, a signal detection and processing circuit and a controller, the input end of the CAN bus interface circuit is connected with a CAN bus; the signal detecting and processing circuit comprises a voltage comparator, the non-inverting input end and the inverting input end of the voltage comparator respectively receive a CANH signal and a CANL signal which are electrically isolated by the CAN bus interface circuit, and the output end of the voltage comparator is connected to a wake-up pin of the controller; the controller is used for monitoring the level state of the wake-up pin, and when the level of the wake-up pin is in an effective state, the electronic equipment is controlled to be switched from the sleep mode to the normal working mode. By introducing an electrical isolation and voltage difference detection mechanism, the problem of false wake-up caused by common-mode interference or bus noise in the prior art is solved, and reliable wake-up under low power consumption is realized.

The present disclosure is an open-loop digital PWM envelope tracking system with dynamic boost function. Systems, apparatuses, and methods are described for dynamically boosting (increasing) the supply voltage of an envelope tracking (ET) modulator in a transmitter system when the target / desired PA supply voltage exceeds a pre-determined threshold (e.g., the pre-determined threshold is equal to the available supply voltage of the system, such as the battery voltage). By boosting the supply voltage input to the ET modulator, the modulated supply provided to the power amplifier (PA) is also increased. As such, voltage clipping, which typically occurs when the target / desired PA supply voltage is higher than the available supply voltage, is mitigated or avoided, and the distortion of the transmitted signal is reduced.

A control circuit for a switching converter has a valley current limiting circuit, a peak current limiting circuit, an ON time control circuit, and a switching control circuit. The valley current limiting circuit provides a valley current comparison signal by comparing a current sense signal with a first current threshold. The current sense signal is representative of a current flowing through a switching circuit of the switching converter. The peak current limiting circuit provides a peak current comparison signal based on the valley current comparison signal, a switching control signal, and a second current threshold. The ON time control circuit provides an ON time control signal based on the switching control signal. The switching control circuit provides the switching control signal based on the voltage comparison signal, the valley current comparison signal, the peak current comparison signal, and the ON time control signal to control the switching circuit.

The invention provides an intrinsically safe PFC line output control circuit, a charging device and a system.The intrinsically safe PFC line output control circuit is provided with a BUCK unit, an output sampling unit, a reference voltage setting unit, a voltage comparison unit and a PWM control unit, the BUCK unit is connected with a preceding-stage PFC circuit, the output sampling unit and the PWM control unit, an output sampling voltage is obtained by outputting a sampling current, and in addition, the voltage comparison unit is connected with the PWM control unit. The output sampling unit and the reference voltage setting unit are connected with the voltage comparison unit, output sampling voltage is compared with reference voltage, a first control signal is output according to a comparison result, then the voltage comparison unit is connected with the PWM control unit, the first control signal is sent to the PWM control unit, the PWM control unit outputs a second control signal, and the PWM control unit outputs the second control signal. Therefore, the conduction state of the BUCK unit is controlled through the second control signal, the output current of the BUCK unit can be intelligently reduced when the output current corresponding to the pre-stage PFC circuit is greater than the maximum output current or the power supply circuit is short-circuited, under-voltage and over-power, and the power supply safety is ensured.

The invention discloses an AC / DC power distribution network protection method and device based on a negative sequence voltage ratio. The method comprises the following steps: constructing a fault identification criterion of a two-phase interphase short-circuit fault of the AC / DC power distribution network according to negative sequence voltage fault characteristics of internal and external faults of the AC / DC power distribution network; determining the fault type of the protection line according to the negative sequence current at the head end measuring point of the AC / DC power distribution network protection line and a pre-constructed fault type identification criterion; when the fault type is a three-phase fault, an overcurrent protection method is adopted to protect the protection line; and when the fault type is a two-phase interphase short-circuit fault, determining an internal and external fault identification result of the protection line according to the negative sequence voltage of the measuring points at the two ends of the protection line, the negative sequence comparison voltage and a fault identification criterion.

The invention discloses a universal single event lock-in effect protection circuit with adjustable multi-channel lock-in current threshold values, and belongs to the field of single event lock-in protection. The circuit comprises a switching circuit, a current monitoring and converting circuit, a voltage comparison circuit, a CPLD (Complex Programmable Logic Device) execution circuit, an MCU (Microprogrammed Control Unit) control circuit and a locking current threshold setting circuit, a locking protection threshold of current can be preset, and any locking threshold current setting can be realized even if the protection circuit is in hardware connection with a load device. Meanwhile, multiple paths of real-time current and voltage can be monitored, and when one path or multiple paths of current reach a locking threshold value, any path or multiple paths of voltage can be cut off, single event locking effect protection is completed, and a load device is protected.

The invention discloses a circuit breaker intelligent comprehensive detector and a detection method in the technical field of circuit breaker intelligent comprehensive detectors. The circuit breaker intelligent comprehensive detector comprises a central unit control / acquisition module, an AC voltage / current output module, an excitation signal module, a contact signal module, an insulation test module and a circuit breaker test module. The central unit control / acquisition module is respectively connected with other modules and is used for distributing instructions to each module, acquiring and conditioning test data signals and evaluating the comprehensive state of the circuit breaker; the alternating voltage / current output module is used for applying excitation to a coil of the voltage comparison relay or the current comparison relay; the excitation signal module is used for applying excitation to the relay coil and the circuit breaker coil; the contact signal module is used for testing the performance of a relay contact; the insulation test module is used for carrying out an insulation test on a secondary circuit of the circuit breaker; the circuit breaker test module is used for testing mechanical characteristics of the circuit breaker.