1293 results about "Voltage divider" patented technology

The invention discloses a DC voltage divider parameter anomaly detection method based on harmonic characteristics, and the method comprises the steps: deploying an isolation type voltage sensor at a bus of a DC power transmission system, carrying out the voltage sampling through combining with an ADC, carrying out the data buffering and preprocessing, extracting a fundamental wave component and a target harmonic component through the fast Fourier transform, and calculating the harmonic distortion rate. And constructing a low-voltage arm capacitance and harmonic distortion rate model based on a voltage divider secondary circuit equivalent circuit and an energy distribution principle, and calibrating the low-voltage arm capacitance and harmonic distortion rate model. And designing a multi-objective optimization scheduling algorithm based on energy storage capacity and capacitance characteristics, and realizing dynamic power distribution and harmonic suppression of the system. And after abnormal triggering, the system automatically loads a capacitance compensation coefficient, adaptively adjusts algorithm parameters in combination with a measurement loop PI control link, reduces a harmonic amplification effect, and ensures that a measurement error is within an acceptable range. Harmonic monitoring precision and capacitance compensation optimization capability of the direct-current power transmission system are effectively improved, and stable operation of the system is guaranteed.

The invention relates to the technical field of voltage acquisition, in particular to a battery string voltage acquisition system with a calibration system and a voltage acquisition method. Which comprises a multi-path voltage input end, a voltage signal adjusting end, a voltage follower, an analog-to-digital converter, a main control center and a communication circuit, and is characterized in that the voltage signal adjusting end comprises a dynamic voltage division network, consists of a digital potentiometer and a high-voltage operational amplifier, and dynamically adjusts the voltage division ratio to suppress common-mode voltage; the main control center is integrated with a multi-channel synchronous sampling calibration module and generates a global synchronous signal through the main MCU to control the ADC to perform synchronous acquisition; a temperature compensation module is arranged between the voltage follower and the ADC, and a digital temperature sensor is adopted to correct the gain drift of the operational amplifier in real time; the voltage division ratio of the dynamic voltage division network is dynamically adjusted according to the real-time common-mode voltage and a preset safety threshold value. According to the scheme, dynamic partial pressure adjustment, multi-channel self-calibration, nonlinear temperature compensation and a rapid protection mechanism can be integrated.

The invention relates to the technical field of medical instruments, in particular to a high-precision time interference non-invasive brain deep electrical stimulation method, equipment and system, and solves the problems that two stimulation electrodes are used for each pair of current in traditional time interference-based non-invasive brain deep electrical stimulation, so that the current distribution is relatively dispersed, and the stimulation focusing performance is relatively poor. According to the method, high-precision 4 * 1 electrode configuration is used, two electrodes for applying a stimulation current are changed into a 4 * 1 electrode form, the flowing path of the current is effectively limited, the current is more focused, and the focusing performance of the interference current is further improved. According to the device, high-precision current control is realized through the anti-phase output circuit, the 4 * 1 voltage division circuit, the constant current source module and the impedance detection module; the system supports forward and reverse electrode position optimization, a personalized real finite element head model simulation system based on MRI data is used for guiding practical application, the focusing performance of each pair of current in a target brain region is improved, and therefore the overall stimulation precision in the target brain region is improved.

A programmable driver circuit (54) and related method (600) for simultaneously controlling multiple tunable probabilistic bit generators are disclosed. The driver circuit comprises a plurality of programmable voltage generators (52; 30), a programming unit (35) and a non-volatile memory unit (34a-b). Input terminals of the plurality of programmable voltage generators are jointly connectible to a single voltage supply source. The programming unit is configured to generate a sequence of programming pulses for the different voltage generators. Each voltage generator comprises a single-stage or multi-stage voltage divider circuit (31) formed by a series of resistive elements (32-1; 32-2; 33). The non-volatile memory unit (34a-b) comprises at least the resistive element positioned first in the series of resistive elements as a programmable resistance and a program control transistor (34-1) connected in series between the programmable resistance and a fixed reference voltage. A control gate of the program control transistor is operatively coupled to the programming unit to receive the sequence of programming pulses for the programmable voltage generator when operated in a programming mode.

The power supply conversion circuit includes an isolation transformer, and the isolation transformer includes at least two primary coils and at least one secondary coil. Each primary coil is connected to a half-bridge circuit by using a first resonant network, and half-bridge circuits corresponding to the at least two primary coils are connected in series between two electrodes of a power supply. The half-bridge circuit is connected in parallel to a voltage divider, the voltage divider includes a first capacitor and a second capacitor that are connected in series, a first terminal of the first resonant network is connected to an intermediate node of the half-bridge circuit, and a second terminal of the first resonant network is connected to a connection point between the first capacitor and the second capacitor.

A device for ascertaining a property of a fluid, having: an electric conductor assembly which is designed to be at least partly brought into contact with the fluid and which is designed as a voltage divider with two elements, wherein the first element is a first conductor which, at least in a current-conducting state, has a resistance value that differs from that of the second element; a measuring bridge with two voltage dividers connected in parallel, one of said voltage dividers being formed by the electric conductor assembly; an actuation unit for applying an AC voltage to the measuring bridge; a voltage detection unit for detecting a bridge voltage; and an analysis unit which is configured to ascertain a thermal conductivity as the property of the fluid by analyzing the bridge voltage using the 3-omega method.

The present disclosure provides a semiconductor device and an electrostatic discharge (ESD) clamp circuit. The semiconductor device includes a voltage divider, a cascoded inverter, and a discharge circuit. The voltage divider is electrically coupled between a power supply voltage and an output voltage of the semiconductor device. The cascoded inverter is electrically coupled to the voltage divider. The discharge circuit is electrically coupled to the cascoded inverter. The cascoded inverter is configured to turn on the discharge circuit o discharge an electrostatic discharge (ESD) current in response to an ESD event occurring on the power supply voltage or the output voltage when the semiconductor device is in an ESD mode.

The invention belongs to the technical field of current source control, and particularly relates to a self-adaptive intelligent current source output control system, and the system works cooperatively through a plurality of modules: a load detection module monitors the load access state in real time, converts a current signal into a voltage signal Udetect, and outputs the voltage signal Udetect; the state stabilization filtering module receives the signal, filters high-frequency noise through an RC low-pass filtering unit, amplifies the signal through an in-phase proportion amplification unit, and is internally provided with a signal monitoring and judging unit to extract a load characteristic signal INPUTIDE in a stable working state; the feedback calculation module generates a feedback control parameter through preset threshold comparison and logical operation according to the INPUTIDE; the analog switch control module selects a resistance potential-divider network input channel according to the feedback control parameters, and outputs a current source regulation and control signal VC; and the adjustable current source module outputs a working current adaptive to the load according to the VC. The self-adaptive intelligent current source output control system is superior to a traditional system in dynamic adaptation, protection mechanism, multi-scene adaptation, precision and stability.

The invention provides a current source circuit and a communication chip. The current source circuit comprises a current source unit and a current processing unit which are connected in sequence, the current source unit is used for providing current; the current processing unit comprises a first voltage dividing element, a first transistor, a second transistor, a third transistor and a first operational amplifier; one end of the first voltage dividing element is connected with the output end of the current source unit, and the other end is connected with the drain electrode of the first transistor and the positive input end of the first operational amplifier; the source electrode of the first transistor is connected with power supply voltage, and the grid electrode is connected with the grid electrode of the second transistor and one end of the first voltage-dividing element; the source electrode of the second transistor is connected with the power supply voltage, and the drain electrode is connected with the source electrode of the third transistor and the reverse input end of the first operational amplifier; the grid electrode of the third transistor is connected with the output end of the first operational amplifier, and the drain electrode serves as the output end of the current processing unit. According to the technical scheme, when the power supply voltage changes, the output current can be kept stable, and the precision is high.

The invention relates to the field of electrical equipment, in particular to a series resonance test system based on a SiC power electronic transformer. The system comprises a power electronic transformer, a resonance reactor and a voltage divider, the power electronic transformer comprises a control module, a driving module, a three-phase rectification module, a high-frequency inversion module, a high-frequency transformer, an output inversion module and an output inversion module. The power electronic transformer is electrically connected with the voltage divider, the voltage divider is electrically connected with the resonance reactor, the resonance reactor is electrically connected with the output inversion module, and the three-phase rectification module, the high-frequency inversion module, the high-frequency transformer, the output inversion module and the output inversion module are in five-stage cascade connection in sequence. The control module is electrically connected with the voltage divider. According to the system, the five-stage power electronic transformer based on the SiC power electronic transformer is adopted, a variable-frequency power source and the transformer are integrally designed, the size and weight of equipment are remarkably reduced, and the system is more convenient to transport and deploy on site.

The invention discloses a virtual connection detection circuit, device and method, and relates to the technical field of circuits, the circuit comprises a comparator, a first resistor, a voltage divider and an indicator; the positive input end of the comparator is used for being connected with a moving point of the voltage divider, the first end of the voltage divider is used for being connected with power supply voltage, and the second end of the voltage divider is used for being grounded; the negative input end of the comparator is used for being connected with the first end of the first resistor, the second end of the first resistor is grounded, the negative input end of the comparator is further used for being connected with the first end of a wire to be detected, and the second end of the wire to be detected is used for being connected with input voltage; the output end of the comparator is used for being connected with an indicator, and the indicator is used for indicating a detection result. The circuit can detect the virtual connection phenomenon, thereby guaranteeing the normal connection of a lead, and reducing the error of a test result.

An electrically conductive circuit has a distal end coupled to a catalytic converter of a vehicle. A sensor such as a voltage divider is coupled to a proximal end of this conductive circuit. The voltage divider senses when a resistance associated with the conductive circuit is altered, indicative of catalytic converter tampering. An alarm signal can then be sent to the vehicle horn or otherwise beneficially outputted to warn of the tampering. The conductive circuit preferably includes a length of nichrome wire having a substantial resistance. Reliable electrical connection and tampering avoidance can be provided at the distal end of the nichrome wire by utilizing an electrically conductive washer at the distal tip, covering the nichrome wire with high temperature insulating tape, overlying the tape with a pipe clamp and encapsulating the washer, distal end of the nichrome wire, insulating tape and pipe clamp with a high temperature bonding adhesive.

A resonant asymmetrical half-bridge flyback power converter includes: a first transistor and a second transistor switching a transformer coupled to a capacitor for generating an output power; a voltage divider coupled to an auxiliary winding of the transformer; a differential sensing circuit which includes a first terminal and a second terminal coupled to the voltage divider to sense an auxiliary signal generated by the auxiliary winding for generating a peak signal and a demagnetization-time signal; and a PWM control circuit configured to generate a first PWM signal and a second PWM signal in accordance with the peak signal and the demagnetization-time signal, for controlling the first transistor and the second transistor respectively; wherein a period of an enabling state of the demagnetization-time signal is correlated to the output power level; wherein the peak signal is related to a quasi-resonance of the transformer after the transformer is demagnetized.

The invention discloses an intelligent control method and system for calibration of a full-automatic sectional direct-current voltage divider, and relates to the technical field of intelligent control and decision making, and the method comprises the steps: automatically recognizing basic parameters of a calibrated voltage divider through a scanning test, detecting the sectional characteristics of the calibrated voltage divider, and building a characteristic model of the calibrated voltage divider; determining a calibration scheme according to the characteristic model, generating test point distribution, time sequence control parameters and a security policy, performing segmented calibration based on the calibration scheme, calculating error information of each test point, obtaining an independent compensation coefficient of each segment according to segmentation characteristics by combining temperature compensation, and performing compensation correction; and obtaining the corrected test point calibration result distribution to evaluate the health state of the calibrated voltage divider, and outputting a calibration conclusion including health state evaluation. Through the intelligent calibration process, the calibration efficiency and accuracy of the direct current voltage divider are remarkably improved, meanwhile, the operation risk is reduced, and reliable technical guarantee is provided for high-voltage direct current measurement.

The invention relates to a full-simulation non-multiplication and addition operation method and device for simulation in-memory calculation, and the method comprises the steps: training a target full model, and obtaining a corresponding weight and a batch normalization parameter, the batch normalization parameter comprising bias information and a zoom factor; based on the simulation in-memory calculation array and the simulation bias array, in combination with the weight and bias information, carrying out multiplication and addition operation and batch normalized bias calculation; generating a target reference voltage of the ReLU-ADC based on a global resistance ladder voltage divider or an analog bias array in combination with a scaling factor, and setting a DAC minimum output voltage thereof; and based on the target reference voltage and the minimum output voltage of the DAC, the ReLU-ADC performs full-simulation non-multiplication-addition operation on the bias multiplication-addition simulation calculation result. Therefore, the problems that in a traditional CIM architecture, a mode of completing non-multiplication and addition operation depending on a digital domain has significant bottlenecks in key performance indexes such as speed, power consumption and area, and the requirements of resource-limited scenes such as an intelligent sensor are difficult to meet are solved.

In the present invention, an abnormality detection unit comprises first voltage divider resistors connected between a first external terminal and a second external terminal, second voltage divider resistors connected between the second external terminal and a ground potential application end, first switches connected between the first external terminal and the second external terminal, second switches connected between the second external terminal and the ground potential application end, first comparators configured to compare the voltage between the first external terminal and the second external terminal with first reference voltages, and second comparators configured to compare the voltage between the second external terminal and the ground potential application end with second reference voltages.

The invention provides an efficient solar water heater, and belongs to the technical field of solar water heaters. Comprising a support, and a base is fixed to the support and used for stably supporting the whole device. The reflecting plate is connected with a heat preservation water tank, the heat preservation water tank is installed on the top of the base, the reflecting plate is installed around the base and can rotate around the base, a vacuum heat collection pipe and a photoresistor are arranged on the side, facing the sun, of the reflecting plate, and the photoresistor is used for detecting the illumination intensity change and is connected with a fixed resistor in series. The voltage division circuit is connected to the two ends of a power supply and is used for generating different partial voltages according to the change of the resistance value of the photoresistor; the microcontroller is connected with the voltage division circuit and is used for detecting the change of the voltage at the two ends of the photoresistor in the voltage division circuit and judging whether the voltage exceeds a set threshold value or not; and the motor driver is connected with the microcontroller. According to the invention, the overall working efficiency can be improved by accurately tracking the sun.

The invention discloses an electronic device and a voltage leakage circuit, the electronic device comprises a control circuit and a power circuit, the control circuit is connected with the power circuit and is used for controlling the power circuit to perform leakage or stop leakage, and the control circuit comprises a voltage division circuit; the comparison circuit is connected with the voltage division circuit and is used for receiving the first voltage from the voltage division circuit and comparing the first voltage with a preset reference voltage; the driving circuit receives the first reference voltage, is connected with the comparison circuit and the power circuit, and is used for outputting the first reference voltage to the power circuit when the first voltage is greater than or equal to the reference voltage so as to control the power circuit to discharge; one end of the hysteresis circuit is connected with the power circuit, the other end of the hysteresis circuit is connected between the voltage division circuit and the comparison circuit, and the hysteresis circuit is used for increasing the first voltage when the driving circuit outputs the first reference voltage to the power circuit. The power circuit is controlled through the voltage division circuit, the comparison circuit and the driving circuit, the cost can be reduced, and the occupied space is small.

A voltage regulator utilizes an external pass transistor coupled between a supply voltage node and a regulated node. The voltage regulator includes an internal pass transistor that is coupled between the supply voltage node and the regulated node. A two-tap voltage divider between the regulated node and a ground node provides two feedback voltages. A first control loop that controls the external pass transistor receives the first feedback voltage and a second control loop that controls the internal pass transistor receives the second feedback voltage. At startup the control loops run concurrently but the first control loop is prioritized to reduce load current provided by the internal pass transistor at the end of startup. The voltage difference between the first and second feedback voltages ensures prioritization of the first control loop and the external pass transistor supplies most or all of the load current.

The invention discloses a final-stage voltage tracking anti-clipping circuit for an audio power amplifier, and relates to the technical field of power amplifiers, and the circuit comprises a voltage division circuit which is used for receiving final-stage voltage from target power amplifier equipment and generating a combined voltage signal; the audio attenuation module is used for receiving an audio input signal and a final-stage voltage, and judging whether amplitude limiting modulation is carried out on the audio input signal or not to complete power amplifier output by judging whether a starting signal is received or not; and the starting judgment module is used for receiving the combined voltage signal and the first output signal, and comparing the combined voltage signal with the first output signal to generate a starting signal. According to the invention, the collected final-stage voltage of the target power amplifier is set as the dynamic amplitude limiting threshold, so that an over-high signal can be effectively suppressed to a safe range quickly when the power supply drops instantaneously, and the effects of avoiding hearing deterioration caused by power amplifier signal waveform truncation and avoiding potential safety hazards caused by amplitude limiting and topping to the loudspeaker are achieved.

A measuring device for has a housing, a measuring circuit board, and a communication circuit board. The measuring circuit board has a voltage connection, a voltage divider, a CT connection for connecting an external current transformer, a measuring chip connected to the voltage divider and the CT connection for determining electrical quantities and outputting as measurement data to a first part of a plug connector. The communication circuit board is connected to a second part of the plug connector, which together with the first part connects the communication circuit board and the measuring circuit board, a data communication chip connected to the second part and electrically isolated to receive the measurement data from the measuring chip, where a galvanic isolation between the measuring chip and the data communication chip is provided on the communication circuit board, a data connection connected to the data communication chip and a user interface.

The invention discloses a high-voltage sampling system and method. The high-voltage sampling system comprises a switch control module, a voltage dividing module, a first monitoring module, a high-voltage sampling module and a main control module, in the voltage dividing module, a first-stage voltage dividing unit is electrically connected with a high-voltage bus through a switch control module; the second-stage voltage dividing unit and the first-stage voltage dividing unit are electrically connected to a first voltage dividing node; the third-stage voltage dividing unit and the second-stage voltage dividing unit are electrically connected to a second voltage dividing node; the first monitoring module is used for monitoring the voltage of the first voltage dividing node, controlling the switch control module to be switched off when the voltage of the first voltage dividing node is abnormal, and providing a first feedback signal for the main control module; the high-voltage sampling module is used for collecting the voltage of the second voltage dividing node and providing a high-voltage sampling signal for the main control module; and the main control module is used for controlling the switch control module to be switched off according to the first feedback signal when the voltage of the first voltage division node is abnormal. By adopting the technical scheme, the safety and the reliability of the high-voltage sampling system are improved.

An oscillator circuit, a corresponding radar sensor, a vehicle, and an operating method are disclosed. An oscillator includes a tunable resonant circuit having an inductor and a variable capacitor coupled between a first node and a second node, and a set of capacitors selectively coupled between the first node and the second node. An input control node receiving an input control signal is coupled to the variable capacitor and the set of capacitors. The tunable resonant circuit is tunable based on the input control signal. A biasing circuit biases the tunable resonant circuit to generate a variable frequency output signal between the first node and the second node. A voltage divider generates a set of different voltage thresholds, and a set of comparator circuits having hysteresis compares the input control signal with the set of different voltage thresholds to generate a set of control signals. The capacitors in the set of capacitors are selectively coupled between the first node and the second node according to the control signals in the set of control signals.

The invention discloses a switching-in circuit with a self-adaptive voltage class and a double check logic. The switching-in circuit comprises a high-precision voltage division module, a double-redundancy sampling framework and a double sampling judgment logic executed by an MCU (Microprogrammed Control Unit), the high-precision voltage dividing module adopts a resistance network matched with a temperature coefficient, and can accurately divide input voltage in a wide temperature range; the double-set redundancy sampling architecture performs parallel sampling on the same path of input signals through two sets of completely independent signal conditioning loops, ADCs, digital isolation chips and isolation power supplies to form a physically isolated redundancy channel; the dual sampling discrimination logic executed by the MCU verifies a dual-channel sampling result based on a logic voting mechanism, and finally outputs a reliable input state or an abnormal alarm; according to the invention, through adaptive voltage design and redundancy check, high reliability is ensured, meanwhile, the requirements for spare parts of equipment of different voltage grades are remarkably reduced, and the inventory management cost is effectively reduced.

The invention discloses a high-voltage electric pulse cracking coal rock stress shock wave monitoring device which comprises a high-voltage pulse capacitor, a voltage divider, a high-voltage pulse switch, a high-voltage pulse cracking generation chamber, a high-voltage probe, a Rogowski coil and an oscilloscope. A test piece is fixed in the high-pressure pulse cracking generation chamber, a circle of test piece clamping assembly corresponding to the test piece is arranged in the high-pressure pulse cracking generation chamber, needle-shaped electrodes are arranged on the two sides, not provided with the test piece clamping assembly, of the test piece, and a piezoelectric pressure sensor is arranged on the high-pressure pulse cracking generation chamber. The detection signal output ends of all the piezoelectric pressure sensors are connected with the pressure detection signal input end of the stress wave signal collector, and a Faraday cage used for covering the piezoelectric pressure sensors is arranged in the high-pressure pulse fracturing generation chamber. The propagation characteristics of the high-voltage electric pulse stress shock waves in the coal rock mass can be accurately and directly captured in real time, and accurate and reliable data support is provided for deep research on a high-voltage pulse electric crushing mechanism.

A low-cost optical fiber IMU voltage acquisition circuit comprises an isolation voltage acquisition circuit and a non-isolation voltage acquisition circuit. In the isolation voltage acquisition circuit, a DC / DC isolation power supply module T1 generates an isolation power supply + 5VGIS; the divider resistor R1 and the divider resistor R2 reduce the isolation voltage to be collected to the input range of the K1. The operational amplifier T2 forms a voltage follower circuit and buffers an isolation voltage signal to be collected; the K1 converts analog voltage into digital quantity; the digital isolator K2 performs level conversion on the digital voltage signal, and the converted voltage value is output to the FPGA in the form of an I2C bus; in the non-isolated voltage acquisition circuit, divider resistors R7-R14 divide non-isolated voltage to be acquired into an input range of a four-channel analog / digital converter K3; the operational amplifiers T3-T11 form a voltage follower circuit and are used for buffering to-be-collected isolation voltage signals; and the K3 converts the analog voltage into a digital quantity and outputs the digital quantity to the FPGA in the form of an I2C bus. The method is used for accurately collecting five paths of voltage values of gyroscope and accelerometer channels in an optical fiber IMU (Inertial Measurement Unit).

According to the data input control system and method of the display device and the display device, the interface compatibility of the display device is greatly expanded through the video signal compatible circuit in the front board. The media resource signal transmitted by the user equipment can be identified and processed by the system regardless of the type of the original interface. And the mainboard module intelligently determines the current interface type according to the received voltage division signal and compares the current interface type with the stored historical interface type so as to select the most suitable driving program and signal processing path. By means of the design, the problem that an existing display device is single in interface is solved, more interface selections are provided for users, and the diversified connection requirements of different users and different devices are met. Besides, the system can automatically convert the media resource signal to the preset signal type, so that the display device can smoothly display the content with high quality, and the user experience is improved.

The utility model belongs to the technical field of electronics, and relates to a detection circuit for high-voltage measurement of insulation resistance based on a solid-state optocoupler relay, when control signals output by an MCU in the detection circuit are HVPI NIOPP and HVP + I NIO, U27 and U34 in the detection circuit are conducted, and a voltage follower U29A is used for measuring the voltage U1 of a total voltage negative to a shell CAMP; when the control signals output by the MCU in the detection circuit are HVPI NIO and HVP-I NIO, U31 and U44 are conducted, and a voltage follower U29B measures the voltage U2 of the total voltage directly facing the shell CAMP; a series connection mode of U36, U27, U31, U34 and U44 is adopted, large voltage is increased, current in a loop is reduced during detection, and the withstand voltage value of the detection circuit is improved; a divider resistor group is used for dividing voltage, and a voltage follower is added, so that coupling of external interference is reduced, and the measurement precision is improved; and an isolated power supply mode is adopted, so that the complete isolation of the battery end and the MCU processing end is met.

The invention relates to the technical field of switching power supply, and discloses a switching power supply constant-current protection circuit and a protection method thereof.The switching power supply constant-current protection circuit comprises an environmental parameter sensing module which collects current signals of a constant-current output loop through a shunt resistor and a differential amplifier, collects input voltage through a resistance voltage-dividing network and collects temperature through a thermistor; the dynamic threshold value generation module is used for receiving the current signal and the environment parameter and generating a dynamic current protection threshold value to maintain constant current output; the AI prediction protection module is used for sampling current signals, extracting high-frequency energy characteristics through frequency domain analysis and comparing the high-frequency energy characteristics with a dynamic current protection threshold value; a digital twin monitoring module; and a protection execution module. Temperature parameters are collected in real time, polynomial fitting calculation is executed, the nonlinear characteristic of a thermistor is converted into a linear compensation coefficient, a protection threshold value is dynamically generated in combination with a current effective value and input voltage fluctuation, and self-adaptive drift compensation of a constant-current protection point in a full temperature range is achieved.

A method for detecting movement of a vehicle body component moveable by an electric motor having a rotor and a three-phase stator, and a motor vehicle. The method includes: loading two stator phases with a pulse-width-modulated voltage and maintaining a third stator phase at a free-floating state; monitoring the third stator phase as a measuring point for an inductive voltage divider formed using the two stator phases; and detecting movement of the vehicle body component when an electric signal at a measuring point or a variable derived from the electric signal exceeds a specified threshold value. The motor vehicle includes a control device that is operable to perform the method.