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US 7,072,190 B2Granted
High efficiency power converter
AssigneeSynQor, Inc.
InventorMartin F. Schlecht
Life of this patent
Estimating the term…
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.
Claims33
A power converter system comprising:
- a DC power source;
- a non-regulating isolation stage comprising:
- a primary transformer winding circuit having at least one primary winding connected to the source;
- and
- a secondary transformer winding circuit having at least one secondary winding coupled to the at least one primary winding and having plural controlled rectifiers, each having a parallel uncontrolled rectifier and each connected to a secondary winding, each controlled rectifier being turned on and off in synchronization with the voltage waveform across a primary winding to provide an output, each primary winding having a voltage waveform with a fixed duty cycle and transition times which are short relative to the on-state and off-state times of the controlled rectifiers;
- and
- a plurality of non-isolating regulation stages, each receiving the output of the isolation stage and regulating a regulation stage output while the fixed duty cycle of the isolation stage is maintained.
4 more elements
A power converter system comprising:
- a DC power source;
- a non-regulating isolation stage comprising:
- a primary transformer winding circuit having at least one primary winding connected to the source;
- and
- a secondary transformer winding circuit having at least one secondary winding coupled to the at least one primary winding and having plural controlled rectifiers, each having a parallel uncontrolled rectifier and each connected to a secondary winding, each controlled rectifier being turned on and off in synchronization with the voltage waveform across a primary winding to provide an output;
- and
- a plurality of non-isolating regulation stages, each receiving the output of the isolation stage and regulating a regulation stage output.
4 more elements
A power converter system comprising:
- a DC power source;
- an isolation stage comprising:
- a primary transformer winding circuit having at least one primary winding connected to the source;
- and
- a secondary transformer winding circuit having at least one secondary winding coupled to the at least one primary winding;
- and plural controlled rectifiers, each having a parallel uncontrolled rectifier and each connected to a secondary winding, each controlled rectifier being turned on and off in synchronization with the voltage waveform across a primary winding to provide an output voltage whose value drops with increasing current flow through the isolation stage;
- and
- a plurality of non-isolating regulation stages, each receiving the output of the isolation stage and regulating a regulation stage output.
5 more elements
A method of providing multiple DC outputs comprising:
- from a DC power source providing an isolated output without regulation by applying power through at least one primary winding connected to the source 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 each connected to a secondary winding, each controlled rectifier being turned on and off in synchronization with the voltage waveform across a primary winding to provide an isolated output;
- and
- from the isolated output, providing plural regulated outputs without further isolation.
A method of providing multiple DC outputs comprising:
- from a DC power source providing an isolated output by applying power through at least one primary winding connected to the source 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 each connected to a secondary winding, each controlled rectifier being turned on and off in synchronization with the voltage waveform across a primary winding to provide an isolated output, the isolated output being a voltage whose value drops with increasing current flow;
- and
- from the isolated output, providing plural regulated outputs without further isolation.
Dependencies are inferred from the claim text.