High frequency ferroresonant transformer
First Claim
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1. A ferroresonant transformer power supply, comprising;
- a source of alternating current voltage;
a drive winding of a ferroresonant transformer coupled to said source and wound around a magnetic core of said ferroresonant transformer;
a first capacitance resonating a winding of said ferroresonant transformer for magnetically saturating a core portion under said drive winding during each cycle of said alternating current voltage;
a first load winding wound around said magnetic core for developing a first output voltage;
first means for magnetically decoupling said drive and first load windings; and
a second capacitance resonating with a winding of said ferroresonant transformer for magnetically saturating a core portion under said first load winding during each cycle of said alternating current voltage for regulating said first output voltage.
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Abstract
A ferroresonant transformer includes a drive winding wound around a thin strip of magnetic material and coupled to a high frequency voltage source. The drive winding is resonated with a capacitance for saturating the core portion of the strip under the drive winding. A load winding, separated from the drive winding sufficiently to provide substantial magnetic decoupling, via air, for example, is resonated with a capacitance to saturate the core portion of the strip under the load winding for providing a regulated output voltage across the load winding.
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Citations
22 Claims
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1. A ferroresonant transformer power supply, comprising;
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a source of alternating current voltage; a drive winding of a ferroresonant transformer coupled to said source and wound around a magnetic core of said ferroresonant transformer; a first capacitance resonating a winding of said ferroresonant transformer for magnetically saturating a core portion under said drive winding during each cycle of said alternating current voltage; a first load winding wound around said magnetic core for developing a first output voltage; first means for magnetically decoupling said drive and first load windings; and a second capacitance resonating with a winding of said ferroresonant transformer for magnetically saturating a core portion under said first load winding during each cycle of said alternating current voltage for regulating said first output voltage. - View Dependent Claims (3, 4, 5, 6, 8)
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2. A ferroresonant transformer power supply, comprising:
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a source of alternating current voltage; a drive winding of a ferroresonant transformer coupled to said source and wound around a thin strip magnetic core of said ferroresonant transformer, said thin strip having a surface area-to-volume ratio sufficient to provide cooling of said magnetic core; a first capacitance resonating a winding of said ferroresonant transformer for magnetically saturating a core portion under said drive windng during each cycle of said alternating current voltage; a first load winding wound around said magnetic core for developing a first output voltage; first means for magnetically decoupling said drive and first load windings; and a second capacitance resonating with a winding of said ferroresonant transformer for magnetically saturating a core portion under said first load winding during each cycle of said alternating current voltage for regulating said first output voltage. - View Dependent Claims (7)
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9. A ferroresonant transformer structure for providing a regulated output voltage and a reduced magnetic core temperature increase, comprising:
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a thin slat of magnetic material; an excitation winding wound around said thin slat and suitable for coupling to a source of alternating current voltage; a first capacitance for resonating with a winding of said transformer for magnetically saturating a portion of said thin slat under said excitation winding; a first output winding wound around said thin slat, said first output winding separated from said excitation winding to create a shunt magnetic flux path for providing a substantial amount of magnetic decoupling between said excitation and first output windings; and a second capacitance for resonating with a winding of said transformer for magnetically saturating a portion of said thin slat under said first output winding for providing a regulated first output voltage. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A ferroresonant transformer having a plurality of windings and a magnetizable core and capable of operation at high frequencies without a substantial increase in the temperature of said core, said transformer comprising:
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a magnetizable core including a thin strip portion of thickness small relative to the strip portion width to provide a substantial strip surface area-to-volume ratio; a first of said plurality of windings being wound around said magnetizable core and adapted for coupling to a source of high frequency unregulated alternating current voltage; a second of said plurality of windings developing an output voltage, said second winding being loosely wound lengthwise around said thin strip portion such that the amount of thin strip portion located interior to said second winding is substantially less than the space encompassed by said second winding so as to permit cooling of said thin strip portion; a capacitance coupled to one of said plurality of windings and resonating with said one winding to magnetically saturate a portion of said magnetizable core for regulating the output voltage developed across said second winding. - View Dependent Claims (16, 17)
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18. A ferroresonant transformer power supply, comprising:
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a source of alternating current voltage; an impedance; a ferroresonant transformer with a magnetizable core and a plurality of windings including a drive winding wound around a portion of said magnetizable core, said drive winding being coupled in series with said impedance across said source; a first capacitance resonating one of said plurality of windings for magnetically saturating during each cycle of said alternating current voltage a portion of said magnetizable core associated with said drive winding; a first load winding wound around a portion of said magnetizable core for developing a first output voltage; and a second capacitance resonating one of said plurality of windings for magnetically saturating during each cycle of said alternating current voltage a portion of said magnetizable core associated with said first load winding to regulate said first output voltage. - View Dependent Claims (19, 20, 21, 22)
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Specification