Systems and methods provide a non-contact current measurement system which operates to measure alternating current flowing through an insulated wire without requiring galvanic contact with the insulated wire. The measurement system may include a magnetic field sensor that is selectively positionable proximate an insulated wire under test. In operation the magnetic field sensor detects a magnetic field generated by the current flowing in the insulated wire. Using an adjustable clamp assembly, the measurement system provides control over the mechanical positioning of the insulated wire relative to the magnetic field sensor to ensure consistent measurements. The non-contact current measurement system may determine information relating to the physical dimensions (e.g., diameter) of the insulated wire. Using the detected magnetic field, the known mechanical positioning, and the determined information relating to the physical dimensions of the insulated wire, the measurement system accurately determines the magnitude of the current flowing through the insulated wire without galvanic contact.

A shunt resistor for enhancing accuracy of current detection in the process of detecting current flowing through the shunt resistor and an apparatus for detecting current including the same. The shunt resistor includes two busbars made of an electrically conductive material and spaced apart a predetermined distance, a first connection element made of an electrically conductive material and configured to be mounted in a first busbar provided on one side among the two busbars, and a second connection element made of an electrically conductive material and configured to be mounted in a second busbar provided on the other side among the two busbars. The first connection element and the second connection element are configured to have an increase or decrease in an area of direct or indirect contact between the first connection element and the second connection element.

A nested ammeter for measuring the electrical current flowing through a device under test (DUT) can include an input configured to receive an input signal having a frequency within a frequency band and representing the electrical current flowing through the DUT. The nested ammeter can also include an output configured to generate an output voltage representing the electrical current flowing through the DUT. An active shunt can be used as the resistive feedback of the ammeter. A nested active shunt can be used as the resistive feedback element of the active shunt.

A current sensor includes a bus bar, a magnetic core, and a casing. The bus bar includes a plate-shaped portion. The magnetic core surrounds the plate-shaped portion. The casing houses the bus bar and magnetic core. A thickness direction of the magnetic core is along a longitudinal direction of the plate-shaped portion. The casing includes lower and upper casings. The lower casing includes first and second press-fit portions. The first press-fit portion includes a groove portion into which the plate-shaped portion is press-fitted. In a state where the magnetic core is inserted downward into the second press-fit portion, both-side portions of the magnetic core in a width direction are press-fitted and held by the second press-fit portion. The upper casing includes a pressing portion that presses the bus bar and magnetic core downward. The groove portion is recessed downward, and is along a thickness direction of the magnetic core.

A signal process circuit includes a signal modulation unit, a first resistor, a second resistor, a first discharge unit, a second discharge unit and a discharge detection unit. The signal modulation unit is used to modulate an input signal for generating a modulated signal. The first resistor is coupled between the signal modulation unit and an operation node. The second resistor is coupled between the operation node and the signal modulation unit. The first discharge unit is coupled to the signal modulation unit. The discharge unit is coupled to the signal modulation unit. The discharge detection unit is coupled to the first discharge unit, the operation node and the second discharge unit for detecting an output common voltage and control a discharge path accordingly.

A combination current sensing device comprising a plurality of current measuring sensors, at least one ambience measuring sensor, a voltage measuring device and a computing device; at least a magnetic field concentrator, and a controlled module assembly constraining the magnetic field concentrator and the bar conductor, in a defined position with respect to one another; the combination current sensing device may have a plurality of incoming connections and a plurality of outgoing connections; and the computing device outputs a validated measure of primary current and an auxiliary information according to a plurality of range and a safe value of the primary current, ensuring functional safety. The voltage measuring device determines a voltage, configured functions and health of an electric source in combination with other sensors and the computing device. One or more of the devices may be optional and or external to the combination current sensing device.

A diode with a current sensor is disclosed. The diode includes an anode region, a cathode region, and a channel-stop region. The diode further includes a sense resistor that is connected between the channel-stop region and the cathode region. When the diode is forward biased, a sense current flows through the sense resistor that corresponds to the forward current flowing through the diode. When the diode is reverse biased, the channel-stop region helps prevent a breakdown condition in the diode.

Electrical current sensing and monitoring methods include connecting a compensation circuit across a conductor having a non-linear resistance such as a fuse element. The compensation circuit injects a current or voltage to the conductor that allows the resistance of the conductor to be determined. The current flowing in the conductor can be calculated based on a sensed voltage across the conductor once the resistance of the conductor has been determined.

A current shunt monitor (CSM) circuit for monitoring the current through a sense resistor. An analog circuit provides an analog output signal proportional to the voltage across the sense resistor. A power supply includes a fixed voltage power supply at a first voltage supply level and a floating power supply. The floating power supply operates at a second voltage supply level referenced from the voltage level on a voltage input and a floating ground. The voltage input varies from a voltage level above the first voltage supply level to a voltage level below the first voltage supply level, and the floating power supply provides power to the analog circuit at least when the voltage level of the voltage input is above the first voltage supply level. A crossover circuit switches power from the floating power to the fixed voltage power supply at the first voltage supply level upon detecting the voltage level on the voltage input proximate in value to the first voltage supply level.

The present disclosure relates to a sampling assembly and a battery pack. The assembly comprises: a circuit board comprising a sampling unit; a first detector comprising a first and second connecting ends arranged at interval, wherein the first detector is connected to the circuit board via the first and second connecting ends to transmit information on first voltage between the first and second connecting ends to the circuit board, and the first detector is connectable in series to and between the two terminals to be detected; and a second detector located in a magnetic field generated by current flowing through the first detector and can generate information on second voltage according to the magnetic field, wherein the second detector comprises an output terminal and is connectable to the circuit board via the output terminal to transmit the information on second voltage to the sampling unit.