A measurement arrangement, including a current line, a first measurement location provided on the current line, a second measurement location provided on the current line, and a coolant, wherein the second measurement location is provided at a distance from the first measurement location in order to make it possible to measure a voltage in a measurement section of the current line arising due to a current flowing through the current line, wherein the measurement section is defined between the first measurement location and the second measurement location, and wherein the coolant is of fluid form and at least in areas is in direct contact with the current line in an area between the first measurement location and the second measurement location.

In accordance with an embodiment, a method of measuring a load current flowing through a current measurement resistor coupled between a source node and a load node includes: measuring a first voltage across a replica resistor when a first end of the replica resistor is coupled to the source node and a second end of the replica resistor is coupled to a reference current source; measuring a second voltage across the replica resistor when the second end of the replica resistor is coupled to the source node and the first end of the replica resistor is coupled to the reference current source; measure a third voltage across the current sensing resistor; and calculating a corrected current measurement of the load current based on the measured first voltage, the measured second voltage and the measured third voltage.

Provided is current detection apparatus for detecting current flowing through a power supply path of a power supply control apparatus. The power supply path includes a first conductor and a second conductor. The current detection apparatus includes: a first and a second shunt resistor connected in parallel between the first and the second conductor, and a current detection circuit detecting: (1) current flowing through the first shunt resistor; and (2) current flowing from the first to the second conductor via both the first and second shunt resistors. The current detection apparatus further includes an arithmetic circuit that calculates current flowing through the power supply path based on a correlative relationship between the current flowing from the first to the second conductor via both the first and the second shunt resistor and current flowing through the first shunt resistor, and the current detected by the current detection circuit.

A current sensor for a detection target current using a shunt resistor includes: a resistance value correction circuit having a correction resistor; a signal application unit that applies an alternating current signal to a series circuit of the shunt resistor and the correction resistor; a voltage detection unit that detects terminal voltages of the shunt resistor and the correction resistor; and a correction unit that calculates a resistance value of the shunt resistor and corrects the resistance value for detection; and a power supply circuit having a first power supply generation unit that generates a first power supply of the signal application unit from an input power supply of an outside; and a second power supply generation unit that generates a second power supply of the voltage detection unit.

A sensor package comprising a lead frame, a current sensor die, and an interposer. The lead frame includes: (i) a primary conductor, (ii) a plurality of secondary leads, and (iii) a layer of dielectric material that is disposed between the primary conductor and the plurality of secondary leads. The current sensor die includes one or more sensing elements. The current sensor die is configured to measure a level of electrical current through the primary conductor of the lead frame. The interposer is disposed over the layer of dielectric material. The interposer includes a plurality of conductive traces that are configured to couple each of a plurality of terminals of the current sensor die to a respective one of the plurality of secondary leads.

A method detects an error in a meter having a current transformer, a burden resistor unit and a resistive path switchably connectable across the burden resistor unit. The method includes obtaining in the processing circuit a first value representative of the voltage magnitude across the burden resistor unit while the resistive path is operably decoupled across the burden resistor unit. The method also includes closing a switching element to operably couple the resistive path across the burden resistor unit, and obtaining in a processing circuit a second value representative of a voltage magnitude across the burden resistor unit. The method further includes determining in the processing circuit whether an error exists based on the first value, the second value, and at least one predetermined stored value.

A power converting device includes a DC-DC converting circuit, a DC-AC converting circuit, and an insulation detecting circuit. The DC-DC converting circuit is configured to convert a DC input voltage to a DC bus voltage. The DC-AC converting circuit is electrically coupled to the DC-DC converting circuit and configured to convert the DC bus voltage to an AC voltage. The insulation detecting circuit is electrically coupled between the DC-DC converting circuit and the DC-AC converting circuit. The insulation detecting circuit is configured to detect a ground impedance value of the power converting device according to the DC bus voltage.

A current detector includes a temperature sensor that detects a temperature that corrects variation in electric resistance of a shunt resistor caused by a temperature of the shunt resistor. The shunt resistor detects electric current. The temperature sensor includes a thermocouple. The thermocouple includes a pair of temperature detecting leads made of different types of metals, respectively. The pair of temperature detecting leads are connected to each other at a measurement point at front ends of the pair of temperature detecting leads. A measurement point of the thermocouple is electrically connected to the shunt resistor.

A wireless power feeding device includes first to Nth (N is an integer of 2 or more) switching elements connected in parallel to each other between a power line, which is connected to one end of a power transmission coil, and a ground line, each of the first to Nth switching elements supplying a current to the drive line in accordance with an oscillation signal; a first resistor connected in series with the first switching element between the power line and the ground line; and a current measurement circuit for generating a first measured current signal representing the amount of the drive current on the basis of the potential of one end of the first resistor.

A printed circuit board includes a high voltage section, a high current conductor which is arranged in the high voltage section, and a low voltage section which is separated from the high voltage section. For this purpose, the low voltage section has shielding layers which shield the low voltage section from the high voltage section. A signal processing device is embedded between the shielding layers.