Granted Patent B2

US 12,422,501 · App. 18/248,118 · Granted Sep 23, 2025

Inventors: Enrique Rando (Málaga, ES); Fernando Rodriguez (Málaga, ES); Daniel Montiel (Málaga, ES); David Peláez (Torremolinos, ES)

Assignee: TDK ELECTRONICS AG

G01R31/64G01K1/14

Abstract

Claims (20)

1. An electrical system, comprising:

at least one capacitor element;

at least one sensor configured to measure at least one parameter chosen from device parameters and environmental parameters; and

a processing unit configured to process the at least one parameter and to evaluate a capacitor element information of the at least one capacitor element based on the at least one parameter,

wherein the capacitor element information comprises one or more chosen from a capacitance loss, a tangent variation, a stress, a remaining lifetime, a failure condition,

wherein the at least one sensor comprises one or more sensors configured to perform a pollution measurement where pollution in regard to one or more gas species that are chosen from a gas species created during a pyrolysis event of one or more components of the capacitor element is measured.

2. The electrical system according to claim 1 , wherein the capacitor element is a film capacitor comprising a polymer film.

3. The electrical system according to claim 2 , wherein the one or more gas species comprise one or more inflammable gas species produced due to a decomposition of the polymer film.

4. The electrical system according to claim 1 , wherein the electrical system comprises a plurality of sensors configured to measure a plurality of parameters chosen from device parameters and environmental parameters.

5. The electrical system according to claim 1 , wherein the at least one sensor comprises one or more sensors configured to measure an electrical condition of operation of the capacitor element and/or the electrical system.

6. The electrical system according to claim 1 , wherein the at least one sensor comprises one or more sensors configured to measure at least one of a DC voltage, a DC current, a ripple voltage, and a temperature at a hot spot of the at least one capacitor element or of a housing of the at least one capacitor element.

7. The electrical system according to claim 4 , wherein the processing unit is configured to estimate a maximum temperature inside the housing of the at least one capacitor element based on the measured temperature of the housing.

8. The electrical system according to claim 1 , wherein the at least one sensor comprises one or more sensors configured to measure an environmental humidity, an environmental temperature, vibrations.

9. The electrical system according to claim 1 , wherein the processing unit comprises a microprocessor and/or a personal computer.

10. A method for monitoring at least one capacitor element in an electrical system as claimed in claim 1 , wherein

at least one parameter is measured, the at least one parameter being chosen from device parameters and environmental parameters, and

a capacitor element information of the at least one capacitor element is evaluated based on the at least one parameter.

11. The method according to claim 10 , wherein, during operation of the electrical system and/or the at least one capacitor element, the at least one parameter is measured in real-time and the capacitor element information is evaluated in real-time.

12. The method according to claim 10 , wherein, based on the capacitor element information, an information is provided for an operator of the electrical system.

13. The method according to claim 10 , wherein the at least one parameter that is measured comprises one or more gas species that are chosen from gas species created during a pyrolysis event of one or more components of the capacitor element.

Assignments (1)

Priority Claims (2)

Continuity (1)

References Cited (13)