Intelligent Current Analysis for Resonant Converters

• US 20130307559A1
• Filed: 05/05/2013
• Published: 11/21/2013
• Est. Priority Date: 05/04/2012
• Status: Active Grant

• Current Assignee: Delta Electronics Thailand Public Company Limited (Delta Electronics Incorporated)
• Original Assignee: Det Internation Holding Limited
• Inventors: Davila, Marco Antonio
• Granted Patent: US 9,494,631 B2
• Time in Patent Office: Days
• US Class Current: 324/537
• CPC Class Codes: G01R 27/2611 Measuring inductance
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/00712 the cycle being controlled or terminated in response to electric parameters
• CPC Class Codes: H02M 3/3387 in a push-pull configuration
• CPC Class Codes: Y02B 70/10 Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
• CPC Class Codes: Y02P 80/10 Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

Abstract

A new method of extracting information from a current waveform for the purpose of controlling a resonant converter is presented. The information could also be used for the purpose predicting the inductance and load of a circuit to indicate alignment in a inductive charging system.

Claims

1. A method of analyzing a convener waveform, comprising sampling 3 times in half a period or sampling at 3 different positions in a sequence on different periods for the purpose of extracting waveform information that produces the fundamental component and triangular component (higher harmonic component).

2. The method of claim 1 comprising extracting phase information from the fundamental component.

3. The method of claim 2, wherein the extracted information is used to predict load and inductance information about the circuit.

4. The method of claim 3 wherein the extracting information is used to provide an indication of alignment of the magnetic circuit in a wireless inductive charging system.

5. The method of claim 1, wherein the extracted information is used to predict load and inductance information about the circuit.

6. The method of claim 5 wherein the extracting information is used to provide an indication of alignment of the magnetic circuit in a wireless inductive charging system