58 results about "Micro processor unit" patented technology

The utility model discloses a simulation test device of an initial velocity measuring device. The simulation test device comprises a main control module, a muzzle flame simulation module and a projectile initial velocity simulation module. A main control module; the system comprises a microprocessor unit MCU, a power supply management unit, a light-emitting tube LED driving unit and a communication interface unit. The MCU comprises a memory and an input unit, the memory stores an operation instruction for the light-emitting tube driving unit, and the MCU initializes the light-emitting tube LED driving unit and the communication interface unit after being powered on; the MCU controls an output signal of the LED driving unit according to the parameter setting of the input unit; the muzzle flame simulation module comprises at least one first light-emitting tube LED display screen; the projectile initial velocity simulation module comprises a plurality of second luminous tube LED display screens; and the display screen receives an output signal of the light-emitting tube LED driving unit and generates a predetermined light-emitting pattern. The simulation test device provided by the utility model is used for performance test during debugging, manufacturing and acceptance in the development process of ammunition training guarantee monitoring equipment.

A method and an apparatus are provided for Electron Beam (EB) curing of coils that are coated with energy cured resins. The apparatus comprises a curing assembly, a microprocessor unit, one or more sensors, and a user interface. The curing assembly comprises of a fixed part and a movable part. The fixed part comprises a rotator and a first moving means. The movable part comprises of an accelerator. The fixed part and the movable part are movably coupled to each other using a coupler. The coupler is configured to move using a second moving means. The curing assembly is communicatively coupled to the microprocessor unit. The coil comes at the input gate at the fixed part of the curing assembly for the curing purposes and exits through the output gate at the fixed part of the apparatus after being cured.

The invention discloses a high-voltage iron tower comprehensive performance on-line monitoring device and a monitoring method thereof, and the device comprises a comprehensive monitoring unit which is configured to obtain a monitoring instruction sent by a microprocessor unit to monitor a high-voltage iron tower. The microprocessor unit processes various data of the detected iron tower monitored by the comprehensive monitoring unit and then sends the data to the display unit; the comprehensive monitoring unit comprises a grounding resistance measuring module; an iron tower attitude measurement module; an iron tower screw loosening measurement module and an iron tower temperature measurement module; according to the high-voltage iron tower comprehensive performance on-line monitoring device and the monitoring method thereof, based on a multi-sensing technology, by arranging a plurality of measuring modules electrically connected with the microprocessor unit, the grounding resistance, the space attitude, the screw loosening condition and the iron tower temperature of the high-voltage iron tower can be monitored on line at the same time, manpower and material resources are saved, and meanwhile potential safety hazards are reduced.

The invention relates to the technical field of vehicles, in particular to an MPU rapid failure monitoring method and device, a vehicle and a storage medium, and the method comprises the steps: judging whether a microprocessor unit MPU is in a power-on state, if the MPU is in the power-on state, judging whether a heartbeat signal of the MPU is received within a preset time, and if the heartbeat signal of the MPU is not received within the preset time, judging whether the MPU is in the power-on state; and if not, judging that the MPU is in a failure state, and resetting and restarting the MPU through the power supply control pin. Therefore, the problems that the voltage monitoring cannot cover all heartbeat monitoring, the delay is high, whether the system fails or not can be judged in a long time in the heartbeat monitoring aspect, and rapid failure judgment and recovery cannot be realized in the early starting stage of the MPU, so that the user experience is reduced and the like are solved; the MCU can quickly monitor the failure of the MPU system and reset the MPU system by the aid of the UART / SPI during startup, so that the failure recovery time is remarkably shortened, and a user is prevented from perceiving abnormities.

The utility model relates to the technical field of pest monitoring and control, and discloses a multifunctional pest luring device which comprises an upper cover and a lower cover, the upper cover and the lower cover are connected with a blocking net cylinder through a triangular frame, a catching net is arranged on the inner side of the triangular frame, and the lower end of the blocking net cylinder is in threaded connection with a connecting shell. The upper cover is provided with a blocking net barrel, a trap lamp is arranged in the blocking net barrel, a solar panel is installed on the top of the upper cover, a controller, a microprocessor unit and a wireless communication module are integrated in the solar panel, and a plurality of cameras are installed at the bottom of the upper cover and used for collecting images of insects in the capturing net in real time. The trapping efficiency is improved through the specific wavelength light source and the controller, the modular design is adopted to facilitate maintenance and replacement of parts, remote data transmission and management are achieved in combination with the wireless communication module, and the problems that in the prior art, trapping efficiency is low, maintenance is inconvenient, and a remote operation function is lacked are solved.

The utility model discloses a liquid leakage detection device, which belongs to the technical field of seepage detection and comprises a detection cylinder shell and a detection main body structure, the detection main body structure comprises a plurality of groups of liquid drop receiving sensitive elements, and each liquid drop receiving sensitive element comprises a pair of gold-plated copper pole pieces fixed on the inner wall of the detection cylinder shell; a plurality of groups of liquid drop receiving sensitive elements are arranged on the inner wall of the detection cylinder shell, a centrifugal cup storage seat is movably arranged at the bottom of an inner cavity of the detection cylinder shell, and driving equipment for driving the centrifugal cup storage seat is fixed at the bottom of the detection cylinder shell. Whether liquid drops seep from the centrifugal cup or not is detected by utilizing the change of a resistance value between the two groups of gold-plated copper pole pieces, so that whether the centrifugal cup leaks liquid or not is quickly detected, meanwhile, signals are transmitted out through the signal processing unit and the microprocessor unit, the host controls the equipment to stop, continuous leakage of liquid is avoided, and the detection accuracy is high.

The application discloses a low-temperature self-adaptive intelligent emergency starting power supply and a control method thereof. The emergency starting power supply comprises an internal energy storage unit, an output interface unit, a working condition sensing unit, a power conversion unit, an active thermal management unit and a microprocessor unit. The control method acquires the real-time internal resistance and static voltage of the target battery and the ambient temperature through the working condition sensing unit, and activates the self-heating function in a low-temperature environment. The microprocessor unit matches the preliminary waveform based on a feature database, and corrects the feature sequence of the optimal discharge waveform by using the real-time internal resistance of the target battery. In the pulse output process, the real-time terminal voltage drop rate of the target battery is monitored in real time, and the duty cycle of the optimal discharge waveform is dynamically adjusted, or the pulse output is terminated. The application realizes a closed loop of sensing, preheating, matching, correction and feedback, improves the starting success rate in an extremely cold environment, and ensures the safety of the equipment and the target battery.

The invention discloses a fault diagnosis method and a fault diagnosis device, and relates to the technical field of automotive electronics. The fault diagnosis method is applied to an operating system, the operating system comprises a microprocessor unit and a micro-control unit, and the fault diagnosis method comprises the following steps: controlling the micro-control unit and the microprocessor unit to be started respectively under the condition that the operating system is started and electrified; in the starting process of the microprocessor unit, a stage information code is written into a static random access memory in the operating system through the microprocessor unit, and the stage information code is used for representing the starting stage and the operating state of operation of the operating system; and monitoring data in the static random access memory through the micro-control unit, and reporting a fault under the condition that an abnormal stage information code is monitored. According to the embodiment of the invention, fault diagnosis under the condition of system starting failure can be realized more comprehensively and accurately, so that the overall fault diagnosis efficiency can be effectively improved, and the production efficiency can be improved.

The invention provides a multi-mode control system of an abdominal massage robot. The multi-mode control system comprises an abdominal massage robot body, a main controller and an upper computer, the abdomen massage robot body comprises a multifunctional massage head; the multifunctional massage head is connected with a pressure sensor; the multifunctional massage head is driven by a micro linear motor to achieve Z-axis lifting, driven by a direct-current gear motor to achieve X-Y plane movement and driven by a voice coil motor to achieve high-frequency vibration. A microprocessor unit of the main controller analyzes a control instruction of the upper computer to obtain the position and posture of the massage head in a method pressing period, the movement track of the massage head is determined through movement planning, and the position change of the corresponding motor is obtained after inverse kinematics solution. The microprocessor unit controls the motor driving module to drive the corresponding motor to reach the driving speed or the vibration frequency to drive the massage head to massage; the main controller collects pressure information of the pressure sensor in real time. The abdomen massage robot integrates four massage manipulations including pressing, rubbing, vibrating and pushing. In addition, the position of the motor is controlled in a cascade PID closed-loop mode, real-time force feedback is combined, the accuracy and safety of massage actions are ensured, and damage caused by too large force is prevented.

The invention relates to a satellite positioning acquisition architecture, a satellite positioning acquisition method and a medium, and relates to the technical field of satellite positioning, the architecture comprises a communication module which comprises an application program service support layer and a basic software layer; the microprocessor unit comprises an inertial navigation algorithm and a real-time dynamic difference algorithm; at least two positioning modules, wherein each positioning module comprises a global navigation satellite system engine; wherein the architecture is configured to receive a real-time dynamic differential network signal, a map matching algorithm signal and a satellite positioning signal, and output a preset standardized message signal by processing the signals. The method realizes high-precision, high-robustness and continuous positioning, and can be widely applied to the fields of automatic driving, intelligent transportation and high-precision navigation.

The utility model discloses a multimedia playing device and a public broadcasting system, the device comprises a core board and a main board, the core board comprises a microprocessor unit, an audio coding and decoding unit, a switch chip, a network interface, an HDMI interface and a TF card seat; the microprocessor unit is connected with the network interface through the switch chip, and the microprocessor unit is also connected with the audio coding and decoding unit, the TF card seat and the HDMI interface; the mainboard comprises a USB interface, a loudspeaker interface, a microphone interface, an AUX IN interface and an AUX OUT interface. The USB interface is used for being externally connected with a USB flash disk, the loudspeaker interface is used for being externally connected with a loudspeaker, the microphone interface is used for being externally connected with a microphone, the AUX IN interface is used for being connected with external sound source equipment, and the AUX OUT interface is used for being connected with external sound amplification equipment. The multimedia playing equipment provided by the utility model can meet individual requirements of different users. The method can be widely applied to the technical field of playing equipment.

The invention discloses a circuit and method for resisting white noise interference of an ultrasonic water meter. The circuit comprises a transmitting end ultrasonic transducer, a transmitting coding circuit, a digital clock chip, a microprocessor unit, a receiving coding circuit and a receiving end ultrasonic transducer. The digital clock chip is connected with the transmitting end ultrasonic transducer through the microprocessor unit and the transmitting coding circuit in sequence; the microprocessor unit is connected with a receiving end ultrasonic transducer through a receiving coding circuit in sequence; the digital clock chip is respectively connected with the transmitting end ultrasonic transducer, the transmitting coding circuit, the receiving coding circuit and the receiving end ultrasonic transducer. The white noise interference resistance of the ultrasonic water meter is improved.

The utility model discloses a low-cost highway rain and fog weather vehicle photoelectric prompting device based on millimeter wave radar, which comprises a mounting shell, and a functional assembly is arranged in the mounting shell; the functional assembly comprises a millimeter wave radar module and a microprocessor unit which are arranged in the mounting shell, a power supply module is further arranged on the mounting shell, a photoelectric prompt module is further arranged on the mounting shell, and the photoelectric prompt module is electrically connected with the microprocessor unit. According to the utility model, the function assembly is arranged, the millimeter wave radar module and the microprocessor unit are adopted, traffic flow information is monitored in rainy and foggy weather, and the photoelectric prompt module is controlled, so that a driver is effectively prompted and pre-warned, and the driver can know that vehicles exist in front of and behind the vehicle and drive carefully; a driver can be continuously prompted in real time, the driving safety in rainy and foggy weather is effectively improved, and accidents are reduced.

The utility model relates to the technical field of valve accessories, in particular to a low-power-consumption intelligent fault diagnosis valve positioner which comprises a main signal management unit, a microprocessor unit, an electrical conversion unit and a display control unit which are arranged in a main loop. The auxiliary signal management unit, the signal feedback unit and the isolation communication unit are arranged in the auxiliary loop. The main loop and the auxiliary loop communicate with each other through the isolation communication unit. The main signal management unit obtains a valve position control signal and a valve position state signal, and the auxiliary signal management unit obtains an air source pressure signal, an output pressure signal and a cavity temperature signal. The microprocessor unit adjusts the opening degree of the valve through the electrical conversion unit and feeds back the position of the valve through the signal feedback unit. Through partitioned power supply and time-sharing work, low-power-consumption operation of the valve positioner is achieved, whole-system monitoring of valve position control is achieved through the auxiliary signal management unit, a complete fault safety strategy is provided, the system is overhauled and maintained in time, and safe operation of the system is guaranteed.

The invention discloses a circuit breaker mechanical characteristic on-line monitoring device and a monitoring method thereof, and the device comprises a sound signal obtaining module which is used for collecting an action sound signal in the opening and closing operation process of a circuit breaker, and a microprocessor unit starts a vibration signal obtaining module, a displacement resistance obtaining module and a current signal obtaining module based on the sound signal; the vibration signal acquisition module is used for acquiring vibration signals in the opening and closing process of the circuit breaker; the displacement resistance acquisition module comprises a linear potentiometer connected with a circuit breaker pull rod; the current signal acquisition module is used for acquiring a current signal of the circuit breaker operating mechanism; according to the online monitoring device and method for the mechanical characteristics of the circuit breaker, indexes such as the opening and closing speed, the total stroke, the opening distance, the overtravel, the opening and closing time, the energy storage driving motor coil current and the opening and closing driving electromagnet coil current of the circuit breaker can be monitored on line, and then the running state of the circuit breaker is obtained, so that safe running of the circuit breaker is guaranteed.

A battery system includes a battery subpack having first and second battery cells, a cell monitoring circuit, and a subpack microprocessor. The cell monitoring circuit obtains first and second voltage values. A first switch circuit applies an operational voltage to the subpack microprocessor in response to a first control signal from a master controller. The master controller sends a first message that requests the first and second voltage values from the subpack microprocessor. The master controller stops generating the first control signal to induce the first switch circuit to remove the operational voltage from the subpack microprocessor when the master controller does not receive a second message having the first and second voltage values from the subpack microprocessor within a predetermined amount of time after sending the first message.

The utility model discloses an intelligent wearable bracelet linked with a toll station alarm for reminding. The intelligent wearable bracelet comprises a shell and wireless transmission equipment arranged in the shell, the wireless transmission device comprises a Bluetooth and a display module, the Bluetooth is connected with the display module, and the Bluetooth is used for receiving alarm information from a toll station alarm and transmitting the alarm information to the display module; the display module comprises a microprocessor unit and a screen unit connected with the microprocessor unit. The bracelet disclosed by the utility model can receive various abnormal signals transmitted by an alarm system in a wireless mode. When the bracelet receives the wireless signals, a wearer can be reminded in a vibration and character display mode, accurate transmission of alarm information is ensured, and the wearer is helped to rapidly position an abnormal position.

The invention discloses an indoor personnel tracking method based on an electrostatic sensing technology, and the method comprises the steps: obtaining electrostatic signals when a person reaches different positions of a room through an electrostatic sensor array, a signal conditioning circuit and a microprocessor unit; training a recurrent neural network according to the electrostatic signal time sequence and the personnel position, and deploying a trained recurrent neural network model to a microprocessor; according to electrostatic signals generated by indoor personnel activities, an electrostatic signal time sequence is acquired in real time; and inputting an electrostatic signal time sequence acquired in real time into the microprocessor, and predicting the position of the indoor personnel through the trained recurrent neural network model to obtain a position prediction result. According to the invention, people do not need to carry any equipment, and real-time tracking of the position of the people can be realized through the electrostatic sensor array.

A battery system includes a battery subpack having first and second battery cells, a cell monitoring circuit, and a subpack microprocessor. The cell monitoring circuit obtains first and second voltage values. A first switch circuit applies an operational voltage to the subpack microprocessor in response to a first control signal from a master controller. The master controller sends a first message that requests the first and second voltage values from the subpack microprocessor. The master controller stops generating the first control signal to induce the first switch circuit to remove the operational voltage from the subpack microprocessor when the master controller does not receive a second message having the first and second voltage values from the subpack microprocessor within a predetermined amount of time after sending the first message.

The invention relates to the technical field of vehicle-mounted controllers, in particular to a control method and device and electronic equipment, and is used for solving the problem that the MPU cannot read and write an eMMC storage file and the vehicle use experience of a driving user is influenced due to a failure scene that eMMC firmware and the MPU are interrupted when an eMMC encounters accidental voltage drop. The method comprises the following steps: under the condition that the embedded multimedia controller has specified errors in a current driving cycle period, acquiring a target identifier, and counting an accumulated value of the specified errors; and when the target identifier is used for indicating that the embedded multimedia controller is not restarted and the accumulated value is greater than a preset threshold value, restarting information is sent to the embedded multimedia controller, and the microprocessor unit is controlled to be restarted.

The invention provides an automobile intelligent instrument display screen and a preparation method thereof.The automobile intelligent instrument display screen comprises a signal switching chip, a main port and an auxiliary port, and the signal switching chip comprises a first input port in communication connection with the main port and an output port in communication connection with a display module; a signal detection module is arranged between the main port and the signal switching chip, the signal detection module is respectively in communication connection with the main port and the first input port, the signal switching chip is also provided with a second input port and a control signal port, and the second input port and the control signal port are respectively in communication connection with the microprocessor unit. The microprocessor unit is further in communication connection with the signal detection module, the main port and the auxiliary port. The microprocessor unit controls the signal switching chip to switch the video output source, obtains the working state of the vehicle system through serial port communication and converts the working state into a second host video signal.

The invention discloses an intelligent credible sensing module based on a PUF (Physical Unclonable Function) and a device credible registration and dynamic authentication system and method, and relates to the technical field of data security, the intelligent credible sensing module comprises an encryption chip unit used for superposing a random number and a unique ID (Identity) number according to a registration and authentication process and then carrying out cryptographic conversion to generate PUF input; the PUF chip unit is used for processing the PUF input according to a registration and authentication process to obtain PUF output; the microprocessor unit is used for controlling the encryption chip unit, the PUF chip unit and the storage chip unit and interacting with Internet of Things equipment; and the storage chip unit is used for storing the unique ID number. By integrating the PUF, the traditional Internet of Things equipment is enabled not to be copied and counterfeited without depending on external auxiliary equipment.

The utility model relates to the technical field of container management, in particular to a visual container position information display system suitable for a container stockpiling station, which comprises a data acquisition module comprising a container position sensor unit and a data acquisition control unit, and a data processing module comprising a microprocessor unit and a data conversion circuit, the microprocessor unit is connected with the box position sensor unit through the data acquisition control unit and the data conversion circuit, the visual display module comprises an LED display screen unit and a graphic display controller, and the graphic display controller is connected with the LED display screen unit and the microprocessor unit. The LED display screen unit and the graphic display controller of the visual display module are matched with each other, so that data processed by the microprocessor can be displayed in a visual and clear graphic interface, and a worker can quickly obtain the position and state information of the container.

The invention discloses a passive wireless lightning arrester sensing terminal, which relates to the technical field of power system power transmission and transformation equipment monitoring, and comprises a leakage current acquisition sensing module, a microprocessor unit, a data wireless transmission module, a synchronization module, an energy supply module and a self-checking module, the leakage current acquisition sensing module adopts a Rogowski coil and a high-speed A / D converter to realize wide dynamic range current acquisition; the energy supply module takes energy by using the leakage current of the lightning arrester; the microprocessor unit processes data and controls the on-off of the wireless module to reduce power consumption; the data wireless transmission module adopts a low-power-consumption wireless protocol; the self-checking module monitors the state of each module in real time; according to the invention, the problems of low measurement precision, high power consumption, poor interference resistance and the like in the prior art are solved, high-precision acquisition and wireless transmission of the leakage current, the lightning stroke times and the lightning stroke time of the lightning arrester are realized, and the system has the advantages of low power consumption, high reliability and strong anti-interference capability.

The application discloses a kind of railway signal outdoor equipment temperature and humidity detection device and working method, it is related to railway equipment state monitoring technical field, including battery power supply unit, watchdog power management unit, microprocessor unit, temperature and humidity detection unit and wireless communication unit;The power input of the watchdog power management unit is connected with the output of battery power supply unit, and the output of battery power supply unit power is controlled by watchdog power management unit, and microprocessor unit, temperature and humidity detection unit and wireless communication unit are powered by system power bus;The application has innovative watchdog power management unit design, uses intelligent dynamic power consumption management mode, perfects fault isolation and fault tolerance, has comprehensive remote interaction and operation and maintenance capability and uses the mode of strategy intelligent cooperation, realizes the optimal balance of functionality and reliability.

The invention provides a motor self-braking circuit and a motor self-braking control method. The motor self-braking circuit comprises at least one group of upper and lower bridge circuits for correspondingly driving a motor; and the control circuit controls at least one group of upper and lower bridge circuits. The control circuit comprises a microprocessor unit which generates a control signal and a selection signal according to an input command; the normal operation signal circuit is used for converting and generating upper and lower bridge circuit control signals in a normal operation mode according to the control signals; the brake signal circuit is used for generating upper and lower bridge circuit control signals in a brake operation mode; the selection circuit is used for selecting one group from the upper and lower bridge circuit control signals in the normal operation mode and the upper and lower bridge circuit control signals in the brake operation mode according to a selection signal so as to control at least one group of upper and lower bridge circuits; in the brake operation mode, the upper and lower bridge circuit control signal conducts the lower bridge in at least one group of upper and lower bridge circuits for at least a period of time so as to eliminate the back electromotive force generated when the motor is driven to rotate without power supply.

The present invention discloses a device and method for collecting pressure signals from a shelling cylinder in an aluminum electrolytic cell. The device comprises a microprocessor unit, a signal overvoltage protection and collection unit, a CAN bus interface, an intelligent high-side power switch, and wiring terminals. The wiring terminals are connected to an AD sampling port of the microprocessor unit via an overvoltage protection and collection circuit. The microprocessor unit is connected to a CAN bus interface, which is connected to a cell controller. The wiring terminals are connected to a pressure sensor, which is powered by an intelligent high-side power switch, which is connected to the microprocessor unit. The device effectively solves the circuit protection problem of prolonged signal overcurrent, which can occur when the sensor power line and signal line are short-circuited due to the harsh environment in the electrolytic cell. Furthermore, the device can provide intelligent control and alarm functions.

The utility model discloses audio playing equipment with adjustable amplitude. The audio playing equipment comprises a potentiometer, a microprocessor unit, a resistance detection unit, a signal gain unit and an audio output unit, the potentiometer is used for adjusting the audio amplitude played by the audio playing equipment, the potentiometer is connected with the microprocessor unit, the resistance detection unit is used for detecting the total resistance value of the potentiometer, the resistance detection unit is connected with the microprocessor unit, the microprocessor unit is connected with the signal gain unit, and the signal gain unit is connected with the audio output unit; the microprocessor unit is used for receiving an input audio signal, the signal gain unit is used for performing signal gain processing on the audio signal, and the audio output unit is used for playing the audio signal after signal gain processing. According to the audio playing equipment, the accuracy of audio signal output can be improved, so that the use experience of a user is improved. The method can be widely applied to the technical field of playing equipment.

The invention discloses a multi-mode accurate evaluation system for releasing manipulation in scapulohumeral periarthritis, and the system comprises a pressure sensing glove which is worn on the hand of a doctor to monitor the pressure value during releasing in real time, the pressure sensing glove is provided with a pressure sensor at the palm center, and the pressure sensing glove is provided with a microprocessor unit at the hand back; the inertial sensing unit is used for being worn on the arm of the patient to monitor the lifting angles of the arm of the patient in all directions in the releasing process in real time; the upper computer program is used for acquiring multi-modal data in real time and observing and analyzing; and the Bluetooth communication module is used for transmitting data of the microprocessor unit and the inertia sensing unit on the pressure sensing glove to wireless synchronous data communication of an upper computer program. The problem that in the prior art, a doctor judges the force application size and the joint movement range only through subjective experience is solved, force application overload early warning and accurate release effect evaluation in the operation are achieved through pressure-movement bimodal synchronous quantitative analysis, and the iatrogenic injury risk is reduced.

A control device (1) for operating a load (10) by means of a pulse width modulated voltage signal through a cable harness (20) comprising two or more control lines (21, 22, 23), comprising: a signal generator (30), a plurality of signal generators (21, 22, 23) for generating the pulse width modulated voltage signal and feeding the pulse width modulated voltage signal into a respective one of the control lines (21, 22, 23); a transformer (40), which has a winding (41, 42, 43) for each of the control lines (21, 22, 23) and a compensation winding (44); and a regulator circuit (50), which is designed to regulate the voltage applied on the compensation winding (44) in order to reduce possible common-mode voltages on the control lines (21, 22, 23). According to the invention, the regulator circuit (50) is designed to detect the currently applied voltages of the respective voltage signal on the control lines (21, 22, 23) between the transformer (40) and the load (10) and to average therefrom as a regulating variable for regulating the voltage applied on the compensation winding (44). Furthermore, the control device comprises a low-pass filter unit (60, 70), which is designed to supply a reference variable, which is obtained from a low-pass filtering of a signal, to the regulator circuit (50) in order to regulate the voltage applied to the compensation winding (44), the signal corresponds to a common mode voltage of a pulse width modulated voltage signal output by the signal generator (30) onto the control lines (21, 22, 23) or is provided by a microprocessor unit (80).