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AssigneePower Integrations, Inc.
InventorsArthur B. Odell, Chan Woong Park
Estimating the term…
An energy transfer element having an energy transfer element input winding and an energy transfer element output winding. In one aspect, the energy transfer element input winding is capacitively coupled to the energy transfer element output winding. The energy transfer element is capacitively coupled to electrical earth. One or more additional windings are introduced as part of the energy transfer element. The one or more additional windings substantially reduce capacitive displacement current between the energy transfer element input winding and energy transfer element output winding by balancing the relative electrostatic fields generated between these windings and/or between the energy transfer element and electrical earth by canceling the electrostatic fields generated by all windings within the energy transfer element relative to electrical earth through the selection of the physical position and number of turns in the additional windings.
An energy transfer element, comprising:
The energy transfer element of 1 wherein the third winding is electrically coupled to the first winding.
The energy transfer element of 1 wherein the third winding is electrically coupled to the second winding.
An energy transfer element, comprising:
The energy transfer element of 16 wherein the third winding is electrically coupled to the first winding
The energy transfer element of 16 wherein the third winding is electrically coupled to the second winding
A flyback power supply, comprising:
Dependencies are inferred from the claim text.
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Details of transformers or inductances, in general: special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load…
Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations,…:…
Adaptations of transformers or inductances for specific applications or functions: flyback transformers
Conversion of DC power input into DC power output: constructional details, e.g. physical layout, assembly, wiring or busbar connections
Term end not estimated
1. Field of the Invention
The present invention relates generally to energy transfer elements and, more specifically, the present invention relates to energy transfer elements having multiple windings.
2. Background Information
The present invention detailed illustrated by way of example and not limitation in the accompanying figures.
FIG. 1 is a schematic diagram of a flyback power supply.
FIG. 2 is a schematic diagram of a flyback power supply showing parasitic capacitances.
Embodiments of methods and apparatuses for reducing electrical earth displacement current flow generated by wound components are disclosed. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one having ordinary skill in the art that the specific detail need not be employed to practice the present invention. In other instances, well-known materials or methods have not been described in detail in order to avoid obscuring the present invention.
Reference throughout this specification to “one embodiment” or “an embodiment” means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases “in one embodiment” or “in an embodiment” in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments.
Causes of electrical noise generated by switching power supply circuits are well documented and known to those skilled in the art. This invention specifically deals with the reduction in common mode noise generated by the energy transfer element, commonly referred to as the power supply transformer, during the operation of a switching power supply.