초록 ▼

A resonant power converter is disclosed which is constructed on an integrated magnetic core, with primary, secondary and tertiary windings occupying separate legs of the core. The tertiary winding is connected in a resonant circuit and induces a flux in the primary leg that causes the primary windin

A resonant power converter is disclosed which is constructed on an integrated magnetic core, with primary, secondary and tertiary windings occupying separate legs of the core. The tertiary winding is connected in a resonant circuit and induces a flux in the primary leg that causes the primary winding current to assume the shape of a series of generally sinusoidal pulses. Primary winding switching can thus occur at zero primary current between pulses, thereby eliminating prior interference problems. Furthermore, the converter can be operated in a pulse width modulated mode to accommodate for varying output load levels without the problems of low frequency operation encountered by prior frequency modulated resonant converters.

대표청구항 ▼

A resonant power converter for converting an input DC voltage of one magnitude to an output DC voltage of another magnitude over an operating power range, comprising: an integrated transformer core having at least first, second and third legs which are magnetically coupled with each other, a primary

A resonant power converter for converting an input DC voltage of one magnitude to an output DC voltage of another magnitude over an operating power range, comprising: an integrated transformer core having at least first, second and third legs which are magnetically coupled with each other, a primary winding on the first leg connected for receiving an input DC supply voltage, a switch connected to alternately enable and disable the flow of current through the primary winding, a switch control connected to operate the switch in a rectifying cycle, a secondary winding on the second leg, an output terminal connected in circuit with the secondary winding, a tertiary winding on the third leg, and a capacitor connected in circuit with the tertiary winding to form a resonant circuit which is coupled through the core in a common magnetic flux path with the primary winding to format the primary winding current into a series of generally sinusoidal pulses. said resonant circuit being configured to remain magnetically unsaturated over said operating power range.