The present disclosure relates to controlling a capacitor bank using current measurements from different current sensors depending on the power flow direction. For example, the system may perform capacitor bank control operations using current measurements from a first current sensor coupled to the power line between an initial source and the capacitor bank when power is flowing in a first power flow direction on the power line. The system may determine that power flow on the power line has changed from flowing in the first power flow direction to flowing in a second power flow direction from an updated source, different from the initial source. The system may, upon detecting the change in the power flow direction perform control operations of the capacitor bank using current measurements from a second current sensor between an updated source and the capacitor bank.

A current sensor configured to measure current in a current-carrying conductor. The current sensor includes a shunt configured to be placed in series with the current-carrying conductor, and a Rogowski coil including at least one conductor segment. The shunt and the Rogowski coil are coupled to produce an output signal representing the current in the current-carrying conductor.

The invention relates to a method for operating an electrically drivable motor vehicle. A triggering signal for a pyrotechnic separating element is determined and output with application of a triggering criterion to a received respective electrical signal and/or at least three detected measured values by a microcontroller. A detection unit, two interfaces, and the separating element are electrically coupled to one another centrally via the microcontroller. Depending on the received triggering signal, at least one electrical connecting element is disconnected by the separating element.

A measurement circuit comprises an electronic circuit, multiple measurement channels, and a combining circuit. The electronic circuit includes a first terminal, a second terminal, and a non-resistive circuit element. Each of the multiple measurement channels includes a differential input connected to the electronic circuit. The differential inputs of the multiple measurement channels are connected in series and include a differential input coupled to the non-resistive circuit element. One input of a differential input of a first measurement channel of the multiple measurement channels is connected to the first terminal of the electronic circuit and one input of a differential input of a second measurement channel of the multiple measurement channels is connected to the second terminal of the electronic circuit. The combining circuit receives multiple outputs from the multiple measurement channels and produce a composite output signal.

Embodiments relate to sensing a current provided by a power supply circuit. The current sensing circuit includes a sense transistor for sensing the current provided by a main transistor, a driver for controlling a bias provided to the sense transistor and the main transistor, and a sense resistor for converting the sensed current to a voltage value. Moreover, the current sensing circuit includes a controller that modifies at least one of: (a) a resistance of the main transistor by adjusting the bias voltage provided by the driver, (b) a gain ratio between a load current and a sensing current by adjusting a number of individual devices that are active in the sense transistor, and (c) a resistance of the sense resistor.

Systems, methods, and an apparatus for current monitoring are disclosed. A current monitor comprises a high-voltage side configured to obtain a signal indicative of current through a conductor and apply different levels of gain to different frequency bands of the signal to produce an adjusted signal. A low-voltage side of the current monitor is electrically isolated from the high-voltage side and is configured to split the adjusted signal to produce a plurality of output signals that are each indicative of a level of current at one of the different frequency bands. An isolation amplifier is configured to communicate the adjusted signal from the high-voltage side to the low-voltage side while electrically isolating the high-voltage side from the low-voltage side.

A system and a method for correcting a current value of a shunt resistor, which calculate a change amount of a resistance value by using a variable temperature value of a shunt resistor and calculate a real-time current value flowing in the corresponding shunt resistor based on the calculated change amount of the resistance value and voltage values of both terminals of the shunt resistor, so that even though the temperature value of the shunt resistor is continuously changed, an accurate current value may be obtained by reflecting all the changes.

Embodiments relate to sensing a current provided by a power supply circuit. The current sensing circuit includes a sense transistor for sensing the current provided by a main transistor, a driver for controlling a bias provided to the sense transistor and the main transistor, and a sense resistor for converting the sensed current to a voltage value. Moreover, the current sensing circuit includes a controller that modifies at least one of: (a) a resistance of the main transistor by adjusting the bias voltage provided by the driver, (b) a gain ratio between a load current and a sensing current by adjusting a number of individual devices that are active in the sense transistor, and (c) a resistance of the sense resistor.

A current sensing circuit includes a current sense amplifier and a correction circuit. The current sense amplifier has an offset voltage. The correction circuit is configured to evaluate the offset voltage of the current sense amplifier. The correction circuit is further configured to issue a correction signal to the current sense amplifier based upon the evaluated offset voltage. The correction signal is to adjust the offset voltage.

A measurement circuit is arranged to make several measurements, either at different times or in respect of different frequency components of currents measured by current sensors in respective phases of a multiphase supply system. The measurements are then used to correct for discrepancies in the transfer function of the sensors.