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US 11,381,174 B2Granted
DC voltage conversion circuit and power supply device
AssigneeAlps Alpine Co., Ltd.
InventorMitsunao Fujimoto
Life of this patent
Estimating the term…
Abstract
A direct-current voltage conversion circuit having on/off control with a dead-time period performed alternately on a first switch and a second switch included in a direct-current voltage conversion circuit. When alternating current flows in a series circuit part including two transformers magnetically independent, current flows in an output circuit including a secondary side of one transformer, and energy is accumulated in the other transformer. The permeabilities of the magnetic cores in the first and second transformers is between 15 and 120.
Claims15
A direct-current voltage conversion circuit comprising:
- a first input terminal and a second input terminal;
- a plurality of switches;
- a series circuit in which a primary side of a first transformer and a primary side of a second transformer are electrically connected in series, the first transformer and the secondary transformer having a same polarity and magnetically independent;
- a first output circuit that includes:
- a secondary side of the first transformer and a first rectifier diode electrically connected in series, the secondary side of the first transformer;
- a first output terminal at an edge in a rectification direction of the first rectifier diode;
- and a second output terminal at an edge opposite to the rectification direction of the first rectifier diode;
- a second output circuit that includes:
- a secondary side of the second transformer and a second rectifier diode electrically connected in series with the secondary side of the second transformer;
- the first output terminal at an edge in a rectification direction of the second rectifier diode;
- and the second output terminal at an edge opposite to the rectification direction of the second rectifier diode;
- and
- a controller configured to control the plurality of switches,
- wherein the plurality of switches includes a first switch having one edge electrically connected to the first input terminal and a second switch having one edge electrically connected to the second input terminal;
- wherein the first switch and the second switch are electrically connected in series, and one edge of the series circuit part is electrically connected between the first switch and the second switch;
- wherein, the controller is configured to:
- perform on/off control alternately with a dead-time period to the first switch and the second switch, alternating direction of current flowing in the series circuit part, if a direct-current voltage is applied between the first input terminal and the second input terminal;
- and
- cause:
- a first state in which the first switch is turned on with current flowing in the rectification direction of the first rectifier diode in the first output circuit, accumulating electrical energy in the second transformer;
- and
- a second state in which the second switch is turned on with current flowing in the rectification direction of the second rectifier diode in the second output circuit, accumulating electrical energy in the first transformer, alternately;
- and
- wherein permeability of a magnetic core in the first transformer and permeability of a magnetic core in the second transformer is between 15 and 120.
21 more elements
A power supply device comprising:
- a direct-current voltage conversion circuit comprising:
- a first input terminal and a second input terminal;
- a plurality of switches;
- a series circuit in which a primary side of a first transformer and a primary side of a second transformer are electrically connected in series, the first transformer and the secondary transformer having a same polarity and magnetically independent;
- a first output circuit that includes:
- a secondary side of the first transformer and a first rectifier diode electrically connected in series, the secondary side of the first transformer;
- a first output terminal at an edge in a rectification direction of the first rectifier diode;
- and a second output terminal at an edge opposite to the rectification direction of the first rectifier diode;
- a second output circuit that includes:
- a secondary side of the second transformer and a second rectifier diode electrically connected in series with the secondary side of the second transformer;
- the first output terminal at an edge in a rectification direction of the second rectifier diode;
- and the second output terminal at an edge opposite to the rectification direction of the second rectifier diode;
- and
- a controller configured to control the plurality of switches,
- wherein the plurality of switches includes a first switch having one edge electrically connected to the first input terminal and a second switch having one edge electrically connected to the second input terminal;
- wherein the first switch and the second switch are electrically connected in series, and one edge of the series circuit part is electrically connected between the first switch and the second switch;
- wherein, the controller is configured to:
- perform on/off control alternately with a dead-time period to the first switch and the second switch, alternating direction of current flowing in the series circuit part, if a direct-current voltage is applied between the first input terminal and the second input terminal;
- and
- cause:
- a first state in which the first switch is turned on with current flowing in the rectification direction of the first rectifier diode in the first output circuit, accumulating electrical energy in the second transformer;
- and
- a second state in which the second switch is turned on with current flowing in the rectification direction of the second rectifier diode in the second output circuit, accumulating electrical energy in the first transformer, alternately;
- and
- wherein permeability of a magnetic core in the first transformer and permeability of a magnetic core in the second transformer is between 15 and 120;
- and
- a direct-current power supply electrically connected to each of the first input terminal and the second input terminal included in the direct-current voltage conversion circuit.
24 more elements
Dependencies are inferred from the claim text.