DC-DC converter
First Claim
1. A converter comprising:
- an input to receive an input voltage having an input voltage value;
an output;
a first voltage bus;
a midpoint;
a first transformer having a primary and a secondary;
a first circuit coupled to the input, coupled between the midpoint and the first voltage bus and coupled to the primary of the first transformer;
an output circuit coupled to the secondary of the first transformer and coupled to the output; and
a control circuit coupled to the first circuit and configured to control the first circuit to provide an AC voltage at the primary of the first transformer, wherein the control circuit is configured to generate control signals to control switches of the first circuit using a modified triangular waveform, wherein the modified triangular waveform does not follow a triangular shape over a complete cycle of the waveform, wherein the modified triangular waveform has slope values including at least a positive slope and a negative slope.
1 Assignment
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Accused Products
Abstract
Power converters and methods of converting power are provided. In one aspect a converter includes an input to receive an input voltage having an input voltage value, an output, a first voltage bus, a midpoint, a first transformer having a primary and a secondary, a first circuit coupled to the input, coupled between the midpoint and the first voltage bus and coupled to the primary of the first transformer, an output circuit coupled to the secondary of the first transformer and coupled to the output, and a control circuit coupled to the first circuit and configured to control the first circuit to provide an AC voltage at the primary of the first transformer, wherein the control circuit is configured to control switches of the first circuit using a modified triangular waveform.
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Citations
20 Claims
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1. A converter comprising:
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an input to receive an input voltage having an input voltage value;
an output;
a first voltage bus;
a midpoint;a first transformer having a primary and a secondary; a first circuit coupled to the input, coupled between the midpoint and the first voltage bus and coupled to the primary of the first transformer; an output circuit coupled to the secondary of the first transformer and coupled to the output; and a control circuit coupled to the first circuit and configured to control the first circuit to provide an AC voltage at the primary of the first transformer, wherein the control circuit is configured to generate control signals to control switches of the first circuit using a modified triangular waveform, wherein the modified triangular waveform does not follow a triangular shape over a complete cycle of the waveform, wherein the modified triangular waveform has slope values including at least a positive slope and a negative slope. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A voltage conversion method comprising:
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receiving at an input an input DC voltage, the input DC voltage having a voltage value; creating a second voltage from the input voltage at a first voltage bus; generating a plurality of control signals using a modified triangular waveform, wherein the modified triangular waveform has at least three slope values during a positive portion of a waveform cycle, wherein the modified triangular waveform has slope values including at least a positive slope and a negative slope; creating a first AC voltage from the second voltage using a first plurality of switches by controlling each of the first plurality of switches using one of the plurality of control signals; providing the first AC voltage at a primary of a first transformer; and generating an output voltage at an output from an AC voltage at a secondary of the first transformer. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A converter comprising;
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an input to receive an input voltage having an input voltage value; an output to provide an output voltage; a first voltage bus having a DC bus voltage value; a midpoint; a first transformer having a primary and a secondary; a first circuit coupled to the input, coupled between the midpoint and the first voltage bus and coupled to the primary of the first transformer; an output circuit coupled to the secondary of the first transformer and coupled to the output; and means for controlling the first circuit to generate a three level voltage waveform at the primary of the first transformer over a range of input voltage values using a modified triangular waveform, wherein the modified triangular waveform does not follow a triangular shape over a complete cycle of the waveform, wherein the modified triangular waveform has slope values including at least a positive slope and a negative slope. - View Dependent Claims (18, 19, 20)
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Specification