JP2021193860A5 - - Google Patents

Claims (10)

A power converter (10) comprising a circuit board (30), coils (21, 22a) provided on the circuit board, and a heat dissipation member (40) for holding the circuit board and dissipating heat from the circuit board. in
A heat transfer member (22b) having a higher thermal conductivity than the circuit board is in contact with at least one surface of the circuit board,
The power conversion device, wherein the heat transfer member is thermally connected to the heat dissipation member via an insulating member (63) and serves as a heat transfer path for transferring heat from the coil to the heat dissipation member. A core (50) of the coil is installed on the circuit board so as to overlap at least a part of the coil in the vertical direction of the circuit board,
The heat dissipating member is arranged opposite to the circuit board and has projecting portions (44, 45) projecting from the heat dissipating member toward the circuit board side in the vertical direction while avoiding the core,
The heat transfer member is formed to extend along the circuit board from a position overlapping with the core and the coil in the vertical direction to a position overlapping with the projecting portion. 2. The power conversion device according to claim 1, which is thermally connected to the protrusion. The coil is composed of a plurality of coil members (23a to 23g, 24a to 24h),
Among the plurality of coil members, one or more coil members are arranged so as to overlap the core,
The heat transfer member is configured such that the heat transfer path is formed along the circuit board from a position overlapping the coil member overlapping the core in the vertical direction to a position overlapping the protrusion. The power conversion device according to claim 2, wherein 4. The power converter according to claim 3, wherein the heat transfer member is configured such that the linear heat transfer path is formed along the circuit board. The core is formed with a through hole penetrating along the vertical direction, or formed with a recess (55) opening outward at an outer edge along the vertical direction, or formed with the through hole and the A recess is formed,
The power converter according to any one of claims 2 to 4 , wherein the protruding portion protrudes toward the circuit board through at least one of the through hole and the recess. The power conversion device according to any one of claims 2 to 5 , wherein a part of the coil overlaps the protruding portion without interposing the core in the vertical direction. The heat dissipation members are arranged on both sides of the circuit board in the vertical direction,
7. In the vertical direction, a protruding portion protruding from one of the heat radiating portions is opposed to a protruding portion protruding from the other heat radiating portion with the circuit board interposed therebetween. The power conversion device according to . A plurality of coils are arranged on the circuit board,
8. The projecting part according to any one of claims 2 to 7 , wherein the protruding part is arranged between adjacent coils, overlaps with any of the adjacent coils in the vertical direction, and abuts through the insulating member. A power converter as described. The power converter according to any one of claims 1 to 8 , wherein the heat transfer member also serves as a current path through which current flows. The circuit board is configured by stacking a plurality of layers,
The power converter according to any one of claims 1 to 9 , wherein the heat transfer member is arranged outside the outermost layer of the circuit board or between any one of the layers of the circuit board.