Patent ID: 11936304
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  F  Y | IPC F  H

Claim 6:
7. A DC/DC converter circuit, comprising:
a primary-side circuit configured to convert DC power from a DC power source into a pulse voltage;
an isolation transformer configured to transform the pulse voltage while isolating the pulse voltage;
a secondary-side circuit connectable in a switching manner by a switching circuit to one of a rectifier circuit for a high-voltage low-current output mode or a current doubler circuit for a low-voltage high-current output mode; and
a control circuit configured to perform connection switching control of the switching circuit so as to establish, depending on target supply power, connection to the rectifier circuit in the high-voltage low-current output mode, and connection to the current doubler circuit in the low-voltage high-current output mode,
wherein the isolation transformer has a primary winding connected to an output terminal of the primary-side circuit, and a secondary winding connected to the rectifier circuit,
wherein the rectifier circuit includes a plurality of output terminals and a plurality of rectifier elements,
wherein the current doubler circuit includes a plurality of inductors connected to the rectifier circuit,
wherein the secondary-side circuit includes the switching circuit configured to switch a connection relationship between at least one of the plurality of inductors and the plurality of output terminals in the rectifier circuit,
wherein the control circuit is configured to control the primary-side circuit and the switching circuit,
wherein the rectifier circuit includes, as the plurality of rectifier elements, a first rectifier element, a second rectifier element, a third rectifier element, and a fourth rectifier element,
wherein the switching circuit includes a first circuit and a second circuit,
wherein the secondary winding of the isolation transformer has a first terminal connected to a first terminal of the first rectifier element, a second terminal of the second rectifier element, and a first contact of the second circuit, and the secondary winding has a second terminal connected to a first terminal of the third rectifier element, a second terminal of the fourth rectifier element, and a first contact of the first circuit,
wherein the first rectifier element and the third rectifier element each have a second terminal connected to a second contact of the second circuit,
wherein the first circuit has a common terminal connected to one terminal of a second inductor,
wherein the second circuit has a common terminal connected to one terminal of a first inductor,
wherein the first inductor and the second inductor each have the other terminal connected to one terminal of a capacitor and a first output terminal, and
wherein the second rectifier element and the fourth rectifier element each have a first terminal connected to the other terminal of the capacitor and a second output terminal.