Abstract: A vehicle is disclosed that includes a battery and a controller programmed to calculate a battery voltage characteristic from previously measured charge and discharge data. The battery voltage characteristic is based on differences between the previously measured values when state of charge falls in a range in which the differences are approximately equal. Outside of the range, the charge and discharge voltage data are corrected based on a square root of time to obtain the battery voltage characteristic. The characterization may be performed with a high-rate continuous charge and discharge cycle. Also disclosed is an apparatus for generating the battery characteristic that includes a bi-directional power supply. The battery voltage characteristic is obtained based on the differences of the charge and discharge voltage data and corrected data based on the square root of time. A method is also disclosed based on the same.

Abstract: A temperature detection unit detects the temperature of a power plug. A control unit stops electric conduction to a battery when the detected temperature detected by the temperature detection unit is equal to or higher than a predetermined specified temperature (T1). The control unit recovers the electric conduction to the battery when the detected temperature detected by the temperature detection unit decreases to a specified temperature (T2) or lower, the specified temperature (T2) being lower than the specified temperature (T1).

Abstract: An apparatus is provided for charging an energy storage unit of one or more electrically operated vehicles. The apparatus has at least two charging connections. Each of the charging connections has a communication port for exchanging data with the vehicle connected to the charging connection. The communication port of each of the charging connections is coupled to an assigned first communication device, which is designed for communicating with a corresponding first communication device of the vehicle connected to the relevant charging connections, based on a pulse-width modulated signal transmission. A second communication device is coupled via a coupling point to communication ports of all charging connections to communicate with a corresponding second communication device of a vehicle, based on digital data transmission.

Abstract: A system includes a vehicle with a charge socket and a contactor switching unit, and a charger for charging an electrical energy accumulator of the vehicle at a vehicle-external AC power system. The charger is a vehicle-external charger device. The charger is a portable charger. The charger has a DC-DC converter, and includes first and second charging cables. The first charging cable has an AC power system plug, and the second charging cable has a charge plug.

Abstract: A system for connecting an electric vehicle to a Level I or Level II power source. The system including an electric vehicle supply equipment (EVSE) having an electrical plug compatible with a Level I or Level II power outlet, the plug connected to a power cord. The power cord is connected to a housing containing a number of electrical components configured to control the power flow to an electric vehicle to recharge the vehicle's batteries, via either Level I or Level II. The power cord extends from the housing and is connected to a standard electric vehicle connector compatible with battery electric vehicles (BEV) and plug-in hybrid electric vehicles (PHEV). The EVSE further includes safety measures, such as a relay that controls the flow of power to the vehicle connector and a ground fault interrupter, to protect users from high voltage electric shocks.

Abstract: Methods and systems are provided for a battery charging system. The methods and systems allow a user to charge a plurality of different battery types and configurations via a single battery charger.

Abstract: Methods and systems for adjusting the voltage limits of a battery. In some implementations, voltage data may be received from each of a plurality of battery sections of a vehicle battery. A voltage offset for the vehicle battery may be calculated using the voltage data. The voltage offset may be calculated by determining a difference between an average voltage taken from each of the plurality of battery sections and at least one of a minimum voltage of all of the battery cells and an average cell voltage from a battery section having the lowest average cell voltage. The voltage offset may be applied to dynamically adjust a voltage limit associated with the vehicle battery so as to prevent any of the battery cells in the vehicle battery from exceeding the voltage limit.

Abstract: The present invention provides a control device of a secondary battery. The control device of the secondary battery using, as a positive electrode material, a positive electrode active material that shows a difference of an open circuit voltage curve between during charge and discharge, has a judging unit that judges, on the basis of a charge-discharge state of the secondary battery, whether or not calculation of a current SOC of the secondary battery is possible; and a charge controlling unit that, when judged that the calculation of the current SOC of the secondary battery is not possible by the judging unit, charges the secondary battery up to a predetermined fully charged state.

Abstract: A Wireless battery area network permits the wirelessly monitoring and controlling of individual batteries within large-scale battery applications. The system automatically configures its wireless nodes in the network and provides for the linking of a plurality of batteries (10) to a master battery management unit (M-BMU) (100) by establishing a wireless battery area network within a battery pack that include slave units (S-BMU) (210). The entire system may also be controlled by a top level battery management unit (T-BMU) (510). The system and method allows for the monitoring of voltage, current, temperature, or impedance of individual batteries and for the balancing or bypassing of a battery. A communications controller allows for optimization of wireless communications parameters and beamforming.

Abstract: A battery block is equipped with a plurality of battery blocks. Each of the battery blocks includes at least one battery cell to provide a block voltage of the battery block. A first number of the battery blocks is selected, and the first number of the battery blocks is coupled to voltage terminals of the battery to set a battery voltage which corresponds to the sum of the block voltages of the first number of battery blocks. Further, a second number of the battery blocks is selected, and the second number of battery blocks is coupled to the voltage terminals of the battery to set a battery voltage which corresponds to the sum of the block voltages of the second number of battery blocks.

Abstract: A secure system for charging a battery of a motor vehicle from a power supply network, which system is in a vehicle and includes a mechanism measuring frequency of the network, an injection mechanism injecting current pulses into the network, a mechanism measuring voltage between the ground and a neutral of the network, an analog filter filtering the measured voltages at high frequencies, a digital filter filtering the analog-filtered voltages at low frequencies, and a mechanism determining resistance between the ground and the neutral of the network on the basis of the digitally filtered voltages and an amplitude of the current pulses. The digital filter includes a mean value filter which determines a mean value based on N voltage measurements spaced apart by a time interval T+T/N, where T is the period of the network determined by the mechanism measuring the frequency of the network.

Abstract: Disclosure has a method for charging a rechargeable battery. The rechargeable battery is charged by a charger in a first constant current mode for a main charge time period. After the main charge time period, the charger stops charging the rechargeable battery for a relaxation time period. During a sample time period that starts after a predetermined settle time period following the beginning of the relaxation time period, the charger detects an open-circuit voltage of the rechargeable battery to compare with a target voltage. If the open-circuit voltage is less than the target voltage, the charger charges the rechargeable battery in a second constant current mode for a coercive charge time period.

Abstract: An activate circuit for an electronic device includes a first node, a first transistor including a source coupled to a ground, a drain coupled to the first node, and a gate coupled to a battery voltage, a first diode including an anode coupled to an activate signal, and a cathode a first resistance coupled between the cathode of the first diode and the first node, a capacitor coupled between the first node and the ground having a logic low level, and a second transistor including a source coupled to the ground, a drain coupled to the activate signal, and a gate coupled to the first node.

Abstract: A control circuit for reducing touch current of a power converter includes an auxiliary pin, a zero-crossing signal generator, a frequency limiting signal generator, and a gate signal generator. The auxiliary pin is used for receiving a voltage generated by an auxiliary winding of the power converter. The zero-crossing signal generator is used for generating a zero-crossing signal according to the voltage generated by the auxiliary winding and a first reference voltage. The frequency limiting signal generator is used for generating a frequency limiting signal according to a gate control signal, a burst mode signal, and the voltage generated by the auxiliary winding. The frequency limiting signal is used for limiting the gate control signal to a predetermined frequency. The gate signal generator is used for generating the gate control signal to a power switch of the power converter according to the frequency limiting signal and the zero-crossing signal.

Abstract: The invention relates to a device for influencing reactive power flows in multi-phase alternating current systems comprising a plurality of thyristor-controlled or thyristor-switched coil branches, each of which comprises a first partial coil and a second partial coil, and a first partial coil and a second partial coil respectively form a structurally independent coil subassembly. The essential feature is that the inductance factor of the first partial coil is specifically dimensioned so as to be at least 10% greater than the inductance factor of the second partial coil and the second partial coil in a coil subassembly is disposed structurally above the first partial coil or the second partial coil is disposed structurally in a core region of the first partial coil.

Abstract: A circuit may include a detector, a modulator, a switch, and a stabilizer. The detector may detect current supplied to an output of the circuit to generate an overcurrent signal. The modulator may modulate a pulse signal based upon the output of the circuit. The switch may control a power stage to generate the output of the circuit based upon the overcurrent signal and the pulse signal. The stabilizer may send an offset signal to the modulator. The stabilizer may generate the offset signal with a magnitude adjusted based upon the overcurrent signal, and the modulator may adjust the pulse signal based upon the offset signal.

Abstract: A universal serial bus (USB) power supply is disclosed as including a main body (12) and a cable (24) releasably connectable with each other, the main body (12) being releasably connectable to a direct current (DC) power source and having a USB receptacle (20) electrically connectable with the DC power source. The cable (24) includes a USB plug (26) releasably connectable with the USB receptacle (20) to establish electrical connection and data communication there-between and a connector (30) electrically connected with the USB plug (26). The power supply is operable in a detached mode in which the main body (12) is out of connection with the cable (24) and in an attached mode in which the main body (12) is releasably connected with the cable (24). The power supply is adapted, when in the attached mode, to automatically change the voltage of a DC power output from the connector (30).

Abstract: A control circuit (115), a control method, a DC-DC converter and an electronic device are provided. The control circuit (115) is used to control the DC-DC converter to switch its operation modes. In the control circuit (115), whether mode of the DC-DC converter is to be switched is judged according to parameters of a first duration of an active duration and a second duration of an inactive duration. Comparison of analogue values is prevented, and as a result, the use of the analogue comparator is reduced, thus the influence of the semiconductor processes on designing a controller can be reduced.

Abstract: There is a control circuit comprising first and second DC terminals for connection to a DC network, the first and second DC terminals having a plurality of modules and at least one energy conversion element connected in series therebetween to define a current transmission path, the plurality of modules defining a chain-link converter, each module including at least one energy storage device, the or each energy storage device being selectively removable from the current transmission path to cause a current waveform to flow from the DC network through the current transmission path and the or each energy conversion element and thereby remove energy from the DC network, the or each energy storage device being selectively removable from the current transmission path to modulate the current waveform to maintain a zero net change in energy level of the chain-link converter.

Abstract: An electromagnetic device may include a magnetic flux core and an opening through the magnetic flux core. A conductor winding may be received in the opening and extend through the magnetic flux core. An electrical current flowing through the conductor winding generates a magnetic field about the conductor winding and a magnetic flux flow about the opening in the magnetic flux core. The electromagnetic device may also include a core flux sensor arrangement to detect a magnetic flux level in the magnetic flux core. The electromagnetic device may additionally include a core flux control system configured to adjust the electrical current flowing through the conductor winding to control the magnetic flux level in the magnetic flux core.

Abstract: A voltage conversion circuit is disclosed. The voltage conversion circuit includes an inductor, a first switch transistor, a second switch transistor, a first resistor, a second resistor and a P type transistor. When an input voltage is larger than an output voltage and a switch signal is transited to low voltage level, a control signal is a clamping voltage and the P type transistor enters into a saturation region, so that a drain voltage of the first switch transistor is a sum of the clamping voltage and a source-gate voltage of the P type transistor. When an output voltage is larger than an input voltage and a switch signal is changed to low voltage level, the control signal is the switch signal and the P type transistor enters into a linear region, so that a drain voltage of the first switch transistor is sum of the output voltage and voltage-drop of the P type transistor.

Abstract: A communication device, such as a smart phone, includes an envelope tracking power supply. The envelope tracking power supply is configured for direct connection to a supply voltage. The direct connection may be made without connection through an intermediate voltage regulator, such as a low drop out regulator. The supply voltage may be a relatively high battery voltage, for example, that would normally result in greater than permissible voltage limits on the transistors used in conventional envelope tracking power supplies.

Abstract: A current-mode buck converter is disclosed, wherein the current-mode buck converter operates in a pulse width modulation (PWM) mode or a pulse frequency modulation (PFM) mode. When the current-mode buck converter enters into the PFM mode, the voltage level of the parking voltage is maintained at the voltage level of compensation voltage, so as to decrease switch loss of the current-mode buck converter operating between PWM mode and PFM mode, and stabilize the output voltage of the current-mode buck converter.

Abstract: A voltage setting device has at least one multi-step voltage output, at least one power converter unit, which has at least one first power element that forms at least a part of a power converter branch, and a control unit that controls the first power element according to a first voltage step structure to provide a branch voltage. The power converter unit includes at least one second power element that, together with the first power element, forms the power converter branch and includes a group of modules, each with at least one energy storage device, a switch group and a module output. In a given control mode the control unit controls the group of modules to provide the branch voltage in cooperation with the first power element according to a second voltage step structure which is more detailed than the first voltage step structure.

Abstract: The present disclosure includes switching regulator circuits and methods. In one embodiment, multiple switching regulator stages are coupled to an output. A first switching regulator stage is operated at a different frequency than a second switching regulator stage. In another embodiment, one switching regulator stage is operated at a different duty cycle. Embodiments of the present disclosure may include multiple switching regulator stages that cancel ripple at an output node.

Abstract: The present disclosure provides a naturally freewheeling alternating (AC) current chopping main circuit structure. The naturally freewheeling AC chopping main circuit structure includes an AC chopping main circuit (1) and inductive load (2). The AC chopping main circuit includes a chopping switch element assembly (3), two inductance coils (L1 and L2), two diodes (D1 and D2), and a capacitor (C). The two inductance coils and the two diodes are connected to form a closed circulatory circuit while the circulatory circuit implements natural freewheeling of a chopping current in the two induction coils when the chopping switch element assembly is switched off.

Abstract: Embodiments provide a DC-DC converter (DC-DC=direct current to direct current) for envelope tracking. The DC-DC converter includes a digital control stage and a driving stage. The digital control stage is configured to provide a digital control signal based on digital information describing an amplitude of a digital baseband transmit signal. The driving stage is configured to provide a supply voltage for an RF amplifier (RF=radio frequency) based on the digital control signal.

Abstract: A DC-to-DC converter includes an error integrator that further includes a first amplifier and a second amplifier that each includes a first input for receiving a reference voltage and a second input for receiving a feedback voltage, a capacitor to an output of the second amplifier, and a resistor including a first end being coupled to an output of the first amplifier and a second end being coupled to the capacitor.

Abstract: In accordance with an embodiment, a circuit includes a switch coupled between a first reference terminal and a first output terminal, an inductive element coupled between an input terminal and a second output terminal, and a diode coupled between the first output terminal and the input terminal. The circuit further includes a controller coupled to a control terminal of the switch. The controller is configured to determine a switching signal based on an output signal at the second output terminal and provide the switching signal to the control terminal of the switch.

Abstract: To provide a DCDC converter achieving low power consumption. A clock generation circuit, an error amplifier, a comparator, and a timer are included in a control circuit. The clock generation circuit, the error amplifier, and the comparator each include a bias circuit and a potential hold portion for intermittently holding a constant potential generated in the bias circuit. The potential hold portion includes a capacitor and a switch. The on or off of the switch is intermittently controlled using the timer. Even in a period in which the supply of voltage is stopped, a signal based on a constant potential generated in the bias circuit is continuously output.

Abstract: An electronic apparatus and a method of controlling power thereto are disclosed. The electronic apparatus including: a signal receiver configured to receive an input signal; a power supply configured to supply power to elements of the electronic apparatus; a controller configured to controls power supplied to the power supply; and a driving circuit configured to output an ON signal to the power supply in order to supply power to the elements of the electronic apparatus in response to the signal receiver receiving a preset frequency signal while the controller is turned off. Thus, the electronic apparatus is automatically turned on and off by an input signal of a predetermined frequency without a user's manipulation of an additional power switch, and thus, a user's convenience may be improved.

Abstract: A high efficiency switched capacitor voltage regulator circuit and a method of efficiently generating an enhanced voltage from an input voltage supply. An input voltage Vin from a main power source is the base voltage to be pumped to an enhanced voltage. Auxiliary voltage sources V1 and V2 are from sources (or grounds) available in the system. During phase 1 of a clock signal, a pump capacitor is charged to ?V=V2?V1. During phase 2 of the clock signal, the pump capacitor is connected in series between Vin and an output capacitor, resulting in the sum voltage V=Vin+?V being generated across the output capacitor.

Abstract: Method and device for controlling an inductive load by pulse width modulation, on the basis of a periodic set point control signal having a given set point duty cycle. The set point control signal is, in each period of the set point control signal, in a first logic state determined from the high and low logic states for at least a first duration, and is in the other logic state during the rest of the period. Control signals are generated for activating the inductive load, on the basis of the set point control signal. With the aid of a first counter, the first duration (t0) is determined on the basis of the set point control signal. Via a second counter, a second duration (t0?td2) is determined, for which a logic signal corresponding to an effective control signal observed in the load is in the first determined logic state.

Abstract: A DC/DC converter has an active energy store, such as an inductance, which can be periodically charged and discharged by one or more semiconductor switches, such as transistors. To avoid voltage overshoot, an RCD element is provided for at least one semiconductor switch, wherein a capacitor and a diode of the RCD element are connected in series, and a resistor of the RCD element can be connected either in parallel with the diode or disconnected from the diode by a switch. The diode of the RCD element is arranged so as to be blocking in the conducting direction of the semiconductor switch.

Abstract: An integrated limiter and active filter constituted of: an input node; an output node; a transistor coupled between the input node and the output node; a first control circuit coupled to the control terminal of the transistor and arranged to limit the amount of current flowing through the output node to a predetermined value which is responsive to a signal received at a first reference input; a second control circuit coupled to the control terminal of the transistor and arranged to limit the voltage appearing at the output node to a predetermined value which is responsive to a signal received at a second reference input; and a third control circuit coupled to input node and arranged to provide the second reference input, the third control circuit arranged to set the second reference input responsive to the input voltage and to a predetermined maximum allowed output voltage.

Abstract: The present disclosure relates to methods, systems and a module for operating a power converter module, the power converter module comprises a voltage source, a remote control terminal configured to be connected to a voltage potential for remote control of the power converter module. A voltage converter is configured to send an alarm signal, determine the voltage potential of the remote control terminal, and control an output voltage of the voltage converter at an output terminal of the power converter module based on the determined voltage potential of the remote control terminal. An alarm branch is configured to change the voltage potential of the remote control terminal by a voltage source in response to an alarm signal from the voltage converter when the remote control terminal is connected to a voltage potential, thereby causing the voltage converter to control the output voltage at the output terminal.

Abstract: The invention relates to a coupling device (4) for four phases of a multi-phase converter (2). Said coupling device (4) includes four coupling modules (6, 8, 12, 14), each of which encompasses four parallel through-holes. At least one section of a conductor loop (18, 20, 22, 24) for a phase. At least one section of a conductor loop (18, 20, 22, 24) for a phase penetrates a through-hole of a coupling module (6, 8, 12, 14), sections of conductor loops (18, 20, 22, 24) for at least two phases penetrating all four through-holes of a coupling module (6, 8, 12, 14).

Abstract: A technique is provided for performing sequencing with a nanodevice. Alternating graphene layers and dielectric layers are provided one on top of another to form a multilayer stack of heterojunctions. The dielectric layers include boron nitride, molybdenum disulfide, and/or hafnium disulfide layers. A nanopore is formed through the graphene layers and the dielectric layers. The graphene layers are individually addressed by applying individual voltages to each of the graphene layers on a one to one basis when a particular base of a molecule is in the nanopore. Each of the graphene layers is an electrode. Individual electrical currents are measured for each of the graphene layers as the particular base moves from a first graphene layer through a last graphene layer in the nanopore. The base is identified according to the individual electrical currents repeatedly measured for the base moving from the first through last graphene layer in the nanopore.

Abstract: A technique is provided for performing sequencing with a nanodevice. Alternating graphene layers and dielectric layers are provided one on top of another to form a multilayer stack of heterojunctions. The dielectric layers include boron nitride, molybdenum disulfide, and/or hafnium disulfide layers. A nanopore is formed through the graphene layers and the dielectric layers. The graphene layers are individually addressed by applying individual voltages to each of the graphene layers on a one to one basis when a particular base of a molecule is in the nanopore. Each of the graphene layers is an electrode. Individual electrical currents are measured for each of the graphene layers as the particular base moves from a first graphene layer through a last graphene layer in the nanopore. The base is identified according to the individual electrical currents repeatedly measured for the base moving from the first through last graphene layer in the nanopore.

Abstract: A method of identifying a component by a response to a challenge is disclosed, the component comprising an array of bipolar transistors connectable in parallel so as to have a common collector contact, a common emitter contact and a common base contact, the challenge comprising a value representative of a total collector current value, the method comprising: receiving the challenge; supplying the total collector current to the common collector contact; detecting instability in each of a group of the transistors; and determining the response in dependence on the group. A circuit configured to operate such a method is also disclosed.

Abstract: Disclosed herein is hardware that can be fitted to a pre-existing circuit breaker panel to allow for the monitoring of power draws in the various circuit breaker branches, which hardware includes current transducers coupled to a wireless hub. The current transducers are coupled to the wires proceeding from each of the circuit breaker branches. The hub computes the power draws for each of the branches using the information provided by the CT as well as the AC input voltages provided to the panel. The hub reports these power draws to an Internet gateway, where the results can be viewed at a web server. The web server may also comprise an analysis module that reviews present and historical power draw data to provide useful power consumption information to a customer for example.

Abstract: Foreign object detection apparatus for an IPT system, includes a control means adapted to detect the presence of a foreign object on or adjacent to an IPT primary pad of the system.

Abstract: An exemplary method for calibrating a current transducer of the Rogowski type including a Rogowski coil sensor and an electronic device is performed by determining and correcting the sensitivity of the current transducer of the Rogowski type through the measurement of the self-inductance LRCCT of the coil using the electronic device.

Abstract: A measurement device that performs a predetermined measurement task together with a plurality of other measurement devices is provided. This measurement device is provided with a sampling phase generator for generating a sampling phase for instructing a timing of sampling, and a communication unit for communicating with at least one of the plurality of other measurement devices. The communication unit transmits the sampling phase generated by the sampling phase generator to at least one of the plurality of other measurement devices. The sampling phase generator is configured to generate a third sampling phase, using an operation that is based on a generated first sampling phase and a second sampling phase received by the communication unit from at least one of the plurality of other measurement devices.

Abstract: An arrangement for measuring a current with a Rogowski type current transducer and transducer electronics. The current transducer has a primary conductor winding for carrying the rated current to be measured, and a secondary conductor winding. The secondary conductor winding adapted to induce a voltage signal VS? between a pair of second terminals. The current transducer having a third conductor winding adapted to receive a calibration current signal. The voltage signal VS? contains a coil sensitivity S and is a superposition of a rated current voltage signal and an additional calibration signal. The transducer electronics being adapted to amplify both the current voltage signal and the calibration signal in the same amplifier and divide the amplified current voltage signal by that part of the amplified calibration signal that contains the coil sensitivity and the gain.

Abstract: An arrangement for measuring a current with a Rogowski type current transducer and transducer electronics. The current transducer has a primary conductor winding for carrying the rated current to be measured, and a secondary conductor winding. The secondary conductor winding adapted to induce a voltage signal VS? between a pair of second terminals. The current transducer having a third conductor winding adapted to receive a calibration current signal. The voltage signal VS? contains a coil sensitivity S and is a superposition of a rated current voltage signal and an additional calibration signal. The transducer electronics being adapted to amplify both the current voltage signal and the calibration signal in the same amplifier and divide the amplified current voltage signal by that part of the amplified calibration signal that contains the coil sensitivity and the gain.

Abstract: A dispersed state monitoring device for distributed generation includes a power module, an input conditioning module, a data processing module and a network communication module which are connected successively, wherein the power is input, via a civil plug and a 220V power socket, to the power module and the input conditioning module in the device at the same time. The power module ensures normal operation of the device through conditioning of a voltage. The input conditioning module is responsible for conditioning input voltage signals, extracting voltage transient-state and steady-state signals to be analyzed, and inputting the signals to the data processing module. The data processing module is responsible for analyzing the voltage transient-state and steady-state signals, judging the operating state of the distributed power source, and outputting a judging result to the network communication module. The result is output from the network communication module via a standard RJ45 Ethernet interface.

Abstract: An apparatus and a method for testing a magnetic field sensor are provided, in which the method includes arranging a coil for generating a magnetic field, applying the magnetic field to the magnetic field sensor using the coil, and detecting the magnetic field applied to the magnetic field sensor.

Abstract: A sensor system determines an absolute angular position of a to-be-sensed rotating member. The sensor system may include a rotor with a first magnet coupled to the rotor and a shaft having threads thereon. The sensor system may further include a sleeve with a second magnet and threads complementary to the threads of a shaft. The sleeve may be configured to travel axially along the shaft as a function of rotation of the rotor. The sensor system may also include a first transducer configured to sense orientation of the first magnet and at least one second transducer configured to sense a location of the second magnet along the shaft. Through use of the sensor system, an absolute number of turns and, consequently absolute angular position, of the rotating member can be determined.

Abstract: A current sensor according to the present invention includes a sensor element and a detector. The sensor element includes a core member, an exciting coil and a detection coil. The sensor element is configured such that, while the exciting coil is fed with an excitation signal, comprising a fundamental component, and when the signal to be detected flows, a signal, including a harmonic component, corresponding to the permeability ? of the core member at that point, being superposed on the fundamental component, is outputted from the detection coil. The detector includes a component extraction unit, a level specification unit, and an information output unit.