High efficiency power converter
AssigneeSynQor, Inc.
InventorMartin F. Schlecht
Life of this patent
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Abstract
A power converter nearly losslessly delivers energy and recovers energy from capacitors associated with controlled rectifiers in a secondary winding circuit, each controlled rectifier having a parallel uncontrolled rectifier. First and second primary switches in series with first and second primary windings, respectively, are turned on for a fixed duty cycle, each for approximately one half of the switching cycle. Switched transition times are short relative to the on-state and off-state times of the controlled rectifiers. The control inputs to the controlled rectifiers are cross-coupled from opposite secondary transformer windings.
Claims26
A power converter, comprising:
- a primary transformer winding circuit having at least one primary winding;
- a secondary transformer winding circuit comprising:
- at least one secondary winding coupled to the at least one primary winding;
- a controlled rectifier transistor, each primary winding having a voltage waveform with transition times which are short relative to the on-state and off-state times of the controlled rectifier;
- and
- a capacitive divider circuit, a signal controlling the controlled rectifier transistor being derived from the capacitive divider circuit.
A method for providing rectification in a power converter, comprising:
- controlling a voltage waveform across a primary transformer winding;
- rectifying an AC waveform by a controlled rectifier transistor in a secondary transformer winding circuit, each primary winding having a voltage waveform with transition times which are short relative to the on-state and off-state times of the controlled rectifier;
- and
- capacitively dividing the AC waveform to derive a control signal used to control the controlled rectifier transistor.
A power converter comprising:
- a primary transformer winding circuit having at least one primary winding;
- a secondary transformer winding circuit comprising:
- at least one secondary winding coupled to the at least one primary winding;
- means for rectifying an AC waveform by a controlled rectifier transistor, each primary winding having a voltage waveform with transition times which are short relative to the on-state and off-state times of the controlled rectifier;
- and
- means for capacitively dividing the AC waveform to derive a control signal used to control the controlled rectifier transistor.
Dependencies are inferred from the claim text.