Inductive measurement system and method

Details Inductive measurement system and method Inductive measurement system and method

2006-05-09

2006-05-09

Hollington, Jermele (Department: 2829)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Magnetic saturation

Reexamination Certificate

active

07042207

ABSTRACT:
A system and method measures parameters associated with an inductor such as in a switching converter. The inductance value can be determined by monitoring voltages and currents associated with the inductor when a measurement mode is activated. In one example, the measurement is provided by a signal processing system that includes an analog differentiator. In another example, the measurement is provided by a signal processing system that converts the analog measurement voltages into digital quantities that are analyzed in the digital domain. The value of the inductance value is determined by calculating of ΔVLand ΔIL/Δt. The saturation point in the inductance is located by measuring the change in slew rate of the inductance during the measurement mode. Average values for the inductor and the slew rate can be determined using digital techniques. Other parameters such as current limit and on-time of the inductor can be adjusted by this methodology.

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