Demagnetization circuit for forward converter
AssigneeVeeco Instruments Inc.
InventorItzchak Cohen
Life of this patent
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Abstract
A demagnetization circuit for use with a forward converter includes a drive winding magnetically coupled to the primary winding of the forward converter, a capacitor for absorbing leakage and magnetization energies from the primary winding when the forward converter is switched off, an inductor for absorbing energy from the capacitor, and a switching circuit for selectively connecting the inductor to the input voltage source of the forward converter.
Claims23
A demagnetization circuit for use with a forward converter having a transformer with a primary winding, and an input voltage source, said circuit comprising:
- capacitance means for absorbing magnetizing and leakage energies from said primary winding of said forward converter, wherein said forward converter has a switching transistor with an off condition and an on condition;
- inductance means for absorbing energy stored in said capacitance means;
- switching means responsive to a switching signal for selectively connecting said inductance means to said input voltage source of said forward converter;
- and
- means for supplying said switching signal to said switching means to connect said inductance means to said input voltage source when said switching transistor is in said on condition.
A demagnetization circuit for use with a forward converter having a transformer with a primary winding, and an input voltage source, said circuit comprising:
- capacitance means for absorbing magnetizing and leakage energies from said primary winding of said forward converter;
- a first unidirectional conducting device connected between said primary winding and said capacitance means;
- inductance means for absorbing energy supplied from said capacitance means;
- switching means responsive to a switching signal for selectively connecting said inductance means to said capacitance means;
- and
- a second unidirectional conducting means connected between said input voltage source and said inductance means.
Dependencies are inferred from the claim text.