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US 10,096,764 B2Granted
Application of piezo technology to convert alternating current (AC) line power to isolated direct current (DC) power in high external magnetic fields
AssigneeKoninklijke Philips N.V.
InventorPaul Wayne Bailey
Life of this patent
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Abstract
A system (10) and a method (200) supply power in high external magnetic fields. Alternating current (AC) line power is converted (202) to isolated power using one or more piezoelectric transformers (18). The flow of AC line power to the piezoelectric transformers (18) is regulated (204) to maintain the isolated power at a predetermined voltage.
Claims10
A power supply for supplying power in high external magnetic fields, the power supply comprising:
- a piezoelectric core converter module configured for converting alternating current (AC) line power to isolated direct current (DC) power using one or more piezoelectric transformers;
- and
- a regulator module configured for regulating the flow of AC line power to the piezoelectric core converter module to maintain the isolated power at a predetermined voltage;
- wherein the regulator module includes a microcontroller module and a bias regulator module which provides a first regulated DC power sufficient to power the microprocessor module and a second regulated DC power;
- wherein the piezoelectric core converter module includes an H-bridge module which receives the second regulated DC power from the bias regulator and generates a high frequency pulse train;
- wherein a module determines a difference between the isolated DC power and an expected isolated DC power and the microcontroller controls the H-bridge module to adjust a duty cycle of the high frequency pulse train.
3 more elements
A method for supplying power in high external magnetic fields, the method comprising:
- converting alternating current (AC) line power to isolated direct current (DC) power using one or more piezoelectric transformers;
- and
- regulating the flow of AC line power to the piezoelectric transformers to maintain the isolated power at a predetermined voltage;
- wherein the regulating includes providing a first regulated DC power;
- sufficient to power a microprocessor module and a second regulated DC power;
- wherein the converting includes receiving the second regulated DC power and generating a high frequency pulse train;
- wherein a difference between the isolated DC power and expected isolated DC power is determined and used by the microcontroller to adjust a duty cycle of the high frequency pulse train.
4 more elements
Dependencies are inferred from the claim text.