Circuit and method for achieving zero ripple current in the output of a converter
First Claim
1. A power converter, comprising:
- a transformer for receiving bipolar electrical input power from a power source, said power substantially free of dead time; and
a hybridge rectifier coupled to said transformer and including first and second output inductors of independently selectable, differing inductance, said hybridge rectifier receiving said input power from said transformer and rectifying said input power to produce an output power substantially free of ripple current at a predetermined duty cycle operating point of said converter, said first and second output inductors being of independently selectable, differing inductance thereby to allow said predetermined duty cycle operating point to be adjustable.
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Accused Products
Abstract
A power converter and a method of operating a power converter. The power converter includes: (1) a transformer for receiving bipolar electrical input power from a power source, the power substantially free of dead time and (2) a hybridge rectifier coupled to the transformer and including first and second output inductors of independently selectable, differing inductance, the hybridge rectifier receiving the input power from the transformer and rectifying the input power to produce an output power substantially free of ripple current at a predetermined duty cycle operating point of the converter, the first and second output inductors being of independently selectable, differing inductance thereby to allow the predetermined duty cycle operating point to be adjustable.
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Citations
20 Claims
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1. A power converter, comprising:
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a transformer for receiving bipolar electrical input power from a power source, said power substantially free of dead time; and a hybridge rectifier coupled to said transformer and including first and second output inductors of independently selectable, differing inductance, said hybridge rectifier receiving said input power from said transformer and rectifying said input power to produce an output power substantially free of ripple current at a predetermined duty cycle operating point of said converter, said first and second output inductors being of independently selectable, differing inductance thereby to allow said predetermined duty cycle operating point to be adjustable. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of operating a power converter, comprising the steps of:
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receiving bipolar electrical input power from a power source into a transformer, said power substantially free of dead time; and receiving said input power from said transformer into a hybridge rectifier coupled to said transformer and including first and second output inductors of independently selectable, differing inductance, said hybridge rectifier rectifying said input power to produce an output power substantially free of ripple current at a predetermined duty cycle operating point of said converter, said first and second output inductors being of independently selectable, differing inductance thereby to allow said predetermined duty cycle operating point to be adjustable. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An electrical system, comprising:
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a power conversion stage including power switching devices for receiving electrical power and producing therefrom bipolar electrical input power substantially free of dead time; a transformer having a primary winding coupled to said power conversion stage and having two taps on a secondary winding thereof, said primary winding receiving said bipolar electrical input power from said power conversion stage; a hybridge rectifier coupled between said two taps and including first and second output inductors of independently selectable, differing inductance, said hybridge rectifier receiving said input power from said transformer via said two taps and rectifying said input power to produce an output power substantially free of ripple current at a predetermined duty cycle operating point of said converter, said first and second output inductors being of independently selectable, differing inductance thereby to allow said predetermined duty cycle operating point to be adjustable; and an electrical load, coupled to said rectifier, for receiving and dissipating said output power. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification