9results about "Inductance measurements" patented technology

In one example, circuit (100) includes an emulate current generator (114) configured to provide an emulate current signal in response to a charge current and a discharge current. The emulate current signal may represent an emulate current (EI) through an output inductor. A comparator (116) is configured to provide a comparator signal in response to the emulate current signal and a sense current signal representing a measured value of a current (EI) through the output inductor. An inductor code counter (134) is configured to adjust an inductor code count value in response to the comparator signal. In response to the inductor code count value, a slope of the emulate current signal can be adjusted.

A method and electronic device for determining the resistance of a battery cell are disclosed. The method includes the steps of: performing an EIS analysis of the battery cell based on a plurality of temperatures including a first temperature and a second temperature to obtain a graph relating the impedance of the battery cell to a frequency variation; extracting a first inductance of the battery cell at the first temperature based on a first graph relating the impedance of the battery cell at the first temperature; and determining the resistance of the battery cell at a second temperature based on the first inductance, wherein the second temperature is higher than the first temperature.

Disclosed are a method and an electronic device for determining a resistance of a battery cell, the method comprising the steps of: performing EIS analysis of the battery cell according to a plurality of temperatures including a first temperature and a second temperature so as to obtain a chart relating to the impedance of the battery cell according to a change in frequency; extracting a first inductance of the battery cell at the first temperature on the basis of a first graph relating to the impedance of the battery cell at the first temperature; and determining the resistance of the battery cell at the second temperature on the basis of the first inductance, wherein the second temperature is higher than the first temperature.

A method of measuring a characteristic of an electrical insulation system of a high voltage device connectable to an electrical network, the method comprising the following steps: disconnecting the high voltage device from the electrical network and connecting a measuring equipment to the electrical insulation system, thereby providing a test system, connecting an inductor to the test system, determining a reference frequency, determining a measuring frequency of the measuring operation, measuring at least one of capacitance and loss at the measuring frequency and at the reference frequency, providing at least one correction factor according to formulas, and applying the at least one correction factor on measurement results at the measuring frequency to obtain corrected measurements results corresponding to the reference frequency. A device using the method is also provided.

Provided are systems that includes an a induction heating circuit and at least one processor programmed or configured to generate each line of a plurality of lines, where each line comprises a graphical representation of phase value versus frequency of a signal with which the induction heating circuit is driven, determine a line of the plurality of lines that has a maximum slope, determine an average frequency of the line having the maximum slope, determine a phase value corresponding to the average frequency of the line having the maximum slope, determine a time delay, determine a self-resonant frequency (SRF) value of the induction heating circuit based on the time delay, and determine a characteristic of the induction heating circuit based on the resonant frequency value. Methods and computer program products are also disclosed.

An electronic determination device (20) is configured for determining at least one characteristic parameter of an electrical machine (12) having P phases (22), P > 3, connected to an electrical starter (14) comprising at least P-1 switching arms (24), each switching arm (24) being connected to a respective phase (22) of the electrical machine (12). The determination device (20) comprises a control module (30) configured to control a respective switching arm (24) to be closed and other switching arm(s) (24) to be opened so as to generate a current injection on two phases (22) of the electrical machine (12), an acquisition module (34) configured to acquire, after the generation of the current injection, a measurement of a respective current(s) and voltage(s) of said two phases (22), and a calculation module (36) configured to calculate the at least one characteristic parameter of the electrical machine (12) from the measurement of the respective current(s) and voltage(s).

Flexible, longitudinally extended sensors comprising variably resistive and / or inductive sensing material. Sensors connect to an external processing unit using as few as 2 wires. In operation, sensors measure resistance / inductance along their longitudinal extent (curve). Spectral de-multiplexing allows electrical property differences along sensors to be resolved. This enables shape tracking of the flexible sensor. The sensor principles are suitable for the production of ultra-small diameter probes (for example, smaller than 0.5 mm) of arbitrary length (for example, 30 cm long). There are potential advantages for cost efficiency and ease of manufacture. The sensor can be constructed as a shape tracked guidewire to enable endovascular navigation procedures. The sensor's tracked shape enables deformation tracking of the anatomy. Using the sensor's tracked shape rather than repetitive X-ray imaging improves navigational accuracy and reduces exposure to radiation.

A system and method for measuring mutual inductance between adjacent first communication transmission line and second communication transmission line is disclosed. The system includes a mutual inductance measurement circuit that includes a coupling generator which biases the first communication transmission line with a current ramp signal; a sample and hold circuit which captures an induced voltage on the second communication transmission line using a switched capacitor storage element; a switched capacitor integrator configured to integrate the induced voltage onto an output voltage node; and a comparator configured to switch states once the switched capacitor integration has surpassed a reference trippoint.