Patent ID: 11923775
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  Y | IPC B  H

Claim 10:
11. An in-vehicle power conversion device, comprising:
a transformer including a primary winding and a secondary winding;
an inverter circuit configured to supply a current to the primary winding;
a rectifier circuit configured to rectify an AC voltage generated in the secondary winding into a pulsating voltage;
a smoothing circuit which includes a smoothing coil and a smoothing capacitor, and is configured to smooth the pulsating voltage rectified by the rectifier circuit;
a first conductor and a second conductor to which the smoothing capacitor is electrically connected;
a resin member configured to integrate the first conductor and the second conductor with each other under a state in which the first conductor and the second conductor are insulated from each other; and
a housing which is conductive,
wherein the smoothing capacitor includes a first electrical connection portion, a second electrical connection portion, a mechanical connection portion, and a smoothing capacitor main body in which the first electrical connection portion, the second electrical connection portion, and the mechanical connection portion are provided,
wherein the first electrical connection portion is electrically connected to the first conductor,
wherein the second electrical connection portion is electrically connected to the second conductor,
wherein the mechanical connection portion functions as an additional electrical connection portion configured to fix the smoothing capacitor main body to the first conductor or the second conductor so as to be electrically connected to a fixing destination of the smoothing capacitor main body,
wherein, in the smoothing capacitor, a positional relationship between the first electrical connection portion or the second electrical connection portion and the mechanical connection portion is set such that at least a part of a magnetic flux generated by a current that flows through the first electrical connection portion or the second electrical connection portion is canceled out by a magnetic flux generated by a current that flows through the mechanical connection portion,
wherein a cancellation is achieved by the current that flows through the first electrical connection portion, wherein the current that flows through the first electrical connection portion flows through a first through via in a board secured by the mechanical connection portion,
wherein, in the smoothing capacitor, at least a part of a first rear surface pattern is opposed to a second front surface pattern across the board, the first rear surface pattern is electrically connected to a first front surface pattern through the first through via formed in the board, and
wherein, in the smoothing capacitor, at least a part of a second rear surface pattern is opposed to the first front surface pattern across the board, the second rear surface pattern is electrically connected to the second front surface pattern through a second through via formed in the board.