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.
Claims28
A dc-dc converter system comprising:
- isolation/semi-regulation circuitry comprising:
- a primary transformer winding circuit having at least one primary winding;
- a secondary transformer winding circuit having at least one secondary winding coupled to at least one primary winding and having plural controlled rectifiers, each having a parallel uncontrolled rectifier;
- and
- a control circuit that senses a voltage in the primary transformer winding circuit to provide a feedback control signal without bridging an isolation barrier between the primary and secondary transformer winding circuits, the feedback control signal controlling semi-regulation by control of duty cycle of a transistor in the primary transformer winding circuit;
- and
- an output of the isolation/semi-regulation circuitry whose voltage value drops due to impedance of an output path;
- and
- a plurality of non-isolating switching regulators, each receiving the output of the isolation/semi-regulation circuitry whose voltage value drops.
A method of providing multiple DC outputs comprising:
- applying power from a DC power source through at least one primary winding in a primary transformer winding circuit and at least one secondary winding coupled to the at least one primary winding, the at least one secondary winding being in a secondary transformer winding circuit having plural controlled rectifiers, each having a parallel uncontrolled rectifier, and sensing a voltage in the primary transformer winding circuit to provide a feedback control signal without bridging an isolation barrier of the primary and secondary windings, the feedback control signal controlling regulation by control of duty cycle of a transistor in the primary transformer winding circuit to provide a semi-regulated, isolated output, the semi-regulated, isolated output being a voltage whose value drops due to impedance of an output path;
- and
- from the semi-regulated, isolated output, providing plural further regulated outputs through a plurality of non-isolating switching regulators.
A dc-dc converter system comprising:
- isolation/semi-regulation circuitry comprising:
- a primary transformer winding circuit having at least one primary winding;
- a secondary transformer winding circuit having at least one secondary winding coupled to at least one primary winding and having plural controlled rectifiers, each having a parallel uncontrolled rectifier;
- and
- a control circuit that controls semi-regulation by control of duty cycle of a transistor in the primary transformer winding circuit;
- and
- an output of the isolation/semi-regulation circuitry whose voltage value drops due to impedance of an output path;
- and
- a plurality of non-isolating switching regulators, each receiving the output of the isolation/semi-regulation circuitry whose voltage value drops.
A method of providing multiple DC outputs comprising:
- applying power from a DC power source through at least one primary winding in a primary transformer winding circuit and at least one secondary winding coupled to the at least one primary winding, the at least one secondary winding being in a secondary transformer winding circuit having plural controlled rectifiers, each having a parallel uncontrolled rectifier, and controlling regulation by control of duty cycle of a transistor in the primary transformer winding circuit to provide a semi-regulated, isolated output, the semi-regulated, isolated output being a voltage whose value drops due to impedance of an output path;
- and
- from the semi-regulated, isolated output, providing plural further regulated outputs through a plurality of non-isolating switching regulators.
Dependencies are inferred from the claim text.