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.
Claims30
A DC/DC power converter comprising:
- a nonisolating switching regulator having a regulator output;
- and
- a nonregulating isolating converter receiving the regulator output and providing an isolating converter output, the nonregulating isolating converter comprising:
- a primary transformer winding circuit having at least one primary winding;
- 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;
- a voltage sensor sensing a sensed voltage on the primary side of the power converter;
- a current sensor sensing a sensed current on the primary side of the power converter;
- and
- control of the regulator output based on both the sensed voltage and the sensed current.
A DC/DC power converter comprising:
- a nonisolating switching regulator having a regulator output;
- and
- a nonregulating isolating converter receiving the regulator output and providing an isolating converter output, the nonregulating isolating converter comprising:
- a primary transformer winding circuit having at least one primary winding;
- 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
- a control circuit that controls the nonisolating switching regulator based on both a sensed voltage on the primary side of the power converter and a sensed current on the primary side of the power converter.
A nonisolating regulation stage comprising:
- a nonisolating switching regulator having a regulator output to be applied to a nonregulating isolation stage;
- a voltage sensor sensing a sensed voltage of the regulation stage;
- a current sensor sensing a sensed current of the regulation stage;
- and
- control to the switching regulator based on both the sensed voltage and the sensed current;
- the regulation stage being free of isolation.
A method of providing a DC output comprising:
- regulating a DC input to provide a nonisolated regulated output;
- from the nonisolated regulated output, providing an isolated DC output voltage by applying power through at least one primary winding in a primary transformer winding circuit and at least one secondary winding in a secondary transformer winding circuit, the secondary transformer winding circuit having plural nonregulating controlled rectifiers, each having a parallel uncontrolled rectifier;
- sensing a sensed voltage in the primary transformer winding circuit;
- sensing a sensed current in the primary transformer winding circuit;
- and
- controlling the regulating based on both the sensed voltage and the sensed current.
A method of providing a DC output comprising:
- regulating a DC input to provide a nonisolated regulated output;
- from the nonisolated regulated output, providing an isolated DC output by applying power through at least one primary winding in a primary transformer winding circuit and at least one secondary winding in a secondary transformer winding circuit, the secondary transformer winding circuit having plural nonregulating controlled rectifiers, each having a parallel uncontrolled rectifier;
- and
- controlling the regulating based on both a sensed voltage in the primary transformer winding circuit and a sensed current in the primary transformer winding circuit.
A method of providing a DC output from a nonisolating regulation stage comprising:
- regulating a DC input to provide a non-isolated, regulated output;
- sensing a sensed voltage of the regulation stage;
- sensing a sensed current of the regulation stage;
- and
- controlling the regulating based on both the sensed voltage and the sensed current.
Dependencies are inferred from the claim text.