High-speed capacitor leakage measurement systems and methods

A system for measuring capacitor leakage comprising:

• a plurality of charging switches, each charging switch controlling connection of one of a plurality of capacitors to a charging source;
• a plurality of sensing switches, each sensing switch controlling connection of one of the plurality of capacitors to a voltage sensing device;
• a controller operative to control the plurality of charging switches and the plurality of sensing switches wherein the controller is configured to
• cause all of the plurality of capacitors to be charged and soaked simultaneously, connect selected ones of the plurality of capacitors to the voltage sensing device according to a programmed sequence, and
• for each step in the programmed sequence, provide a measurement of voltage on a capacitor currently connected to the sensing device;
• and
• a computing device programmed to determine leakage values for each of the plurality of capacitors based on a measurement of time required for the voltage on the each capacitor to reach a threshold value after the each capacitor is disconnected from the charging source.

A method for measuring capacitor leakage comprising:

• providing a charging current to a plurality of capacitors, wherein the charging current charges and soaks the plurality of capacitors;
• sequentially connecting each of the plurality of capacitors to a voltage sensing device;
• monitoring voltage of the each capacitor to determine time elapsed until the monitored voltage reaches a predetermined threshold value;
• calculating leakage values for the plurality of capacitors based on the time elapsed for each capacitor, wherein monitoring of each capacitor commences after the each capacitor is disconnected from the charging current.