High efficiency power converter
First Claim
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1. A DC-DC power converter system providing plural regulated DC outputs, comprising:
- a DC input having a DC input voltage;
an isolating converter comprising;
a primary transformer winding circuit having at least one primary winding that receives power from the DC input; 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 of the plural controlled rectifiers having a parallel uncontrolled rectifier and being in circuit with at least one secondary winding, to provide an isolated DC output that varies by more than a few percent as the input voltage varies over its design range, the at least one primary winding having a voltage waveform with transition times that are short relative to on-state and off-state times of the plural controlled rectifiers; and
plural non-isolating switching regulators, each of the plural non-isolating switching regulators receiving power from the isolated DC output of the isolating converter and providing one of the plural regulated DC outputs having a regulated voltage.
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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.
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Citations
22 Claims
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1. A DC-DC power converter system providing plural regulated DC outputs, comprising:
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a DC input having a DC input voltage; an isolating converter comprising; a primary transformer winding circuit having at least one primary winding that receives power from the DC input; 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 of the plural controlled rectifiers having a parallel uncontrolled rectifier and being in circuit with at least one secondary winding, to provide an isolated DC output that varies by more than a few percent as the input voltage varies over its design range, the at least one primary winding having a voltage waveform with transition times that are short relative to on-state and off-state times of the plural controlled rectifiers; and plural non-isolating switching regulators, each of the plural non-isolating switching regulators receiving power from the isolated DC output of the isolating converter and providing one of the plural regulated DC outputs having a regulated voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A DC-DC power converter system providing plural regulated DC outputs, comprising:
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a DC input; an isolating converter comprising; a primary transformer winding circuit having at least one primary winding that receives power from the DC input; 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 of the plural controlled rectifiers having a parallel uncontrolled rectifier and being in circuit with at least one secondary winding, to provide an isolated DC output, the at least one primary winding having a voltage waveform with transition times that are short relative to on-state and off-state times of the plural controlled rectifiers and with a fixed duty cycle when the isolating converter is non-regulating; and plural non-isolating switching regulators, each of the plural non-isolating switching regulators receiving power from the isolated DC output of the isolating converter and providing one of the plural regulated DC outputs having a regulated voltage. - View Dependent Claims (18, 19, 20)
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21. A method of providing plural regulated DC outputs, comprising:
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from a DC input having a DC input voltage, providing an isolated DC output that varies by more than a few percent as the DC input voltage varies over its design range by applying power from the DC input through 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 of the plural controlled rectifiers having a parallel uncontrolled rectifier and being in circuit with the at least one secondary winding, the at least one primary winding having a voltage waveform with transition times that are short relative to on-state and off-state times of the plural controlled rectifiers; and applying power from the isolated DC output to plural non-isolating switching regulators, each of the plural non-isolating switching regulators providing one of the plural regulated DC outputs having a regulated voltage.
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22. A method of providing plural regulated DC outputs, comprising:
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from a DC input, providing an isolated DC output by applying power from the DC input through 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 of the plural controlled rectifiers having a parallel uncontrolled rectifier and being in circuit with the at least one secondary winding, the at least one primary winding having a voltage waveform with transition times that are short relative to on-state and off-state times of the plural controlled rectifiers and with a fixed duty cycle when the isolated DC output is non-regulated; and applying power from the isolated DC output to plural non-isolating switching regulators, each of the plural non-isolating switching regulators providing one of the plural regulated DC outputs having a regulated voltage.
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Specification