Danmarks Tekniske Universitet

Kristian Lindberg-Poulsen

Henrik Schneider

Thomas Andersen

Ziwei Ouyang

Gökan Sen

The present invention relates to a microwave powered sensor assembly for microwave ovens. The microwave powered sensor assembly includes a microwave antenna to generate an RF antenna signal in response to microwave radiation at a predetermined excitation frequency. A direct current (dc) power supply circuit of the microwave powered sensor assembly is operatively coupled to the RF antenna signal to extract energy from the RF antenna signal and produce a power supply voltage. A sensor is connected to the power supply voltage and configured to measure a physical or chemical property of a food item under heating in a microwave oven chamber.

Microwave powered sensor assembly for microwave ovens

The present invention relates to a medical preparation container which includes a microwave power sensor assembly. The microwave powered sensor assembly includes a sensor configured to measure a physical property or chemical property of a medical preparation during its heating in a microwave oven. The microwave powered sensor assembly is configured for harvesting energy from a microwave radiation emitted by the microwave oven and energize the sensor by the harvested microwave energy.

Medical preparation container comprising microwave powered sensor assembly

An isolated boost power converter comprises a magnetically permeable multi-legged core () comprising first and second outer legs () and a center leg () having an air gap () arranged therein. A boost inductor (Lboost) is wound around the center leg () or the first and second outer legs () of the magnetically permeable multi-legged core (). The boost inductor (Lboost) is electrically coupled between an input terminal () of the boost converter and a transistor driver () to be alternatingly charged and discharged with magnetic energy. A first and second series connected secondary transformer windings (SW; SW) with a center-tap () arranged in-between are wound around the first and second outer legs (), respectively, of the magnetically permeable multi-legged core (). In a first discharge state, the magnetic energy stored in the boost inductor (Lboost) is discharged by directing a discharge current from the boost inductor through a primary transformer winding (PW; PW) and in a second discharge state, the magnetic energy stored in the boost inductor (Lboost) is discharged by discharging a magnetic flux through the first and second secondary transformer windings (SW; SW).

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Copenhagen, Denmark

Kristian Lindberg-Poulsen