Power conversion device
A shield plate is used for reducing an influence that noise generated from a power conversion module has on a control board, and the shield plate is fastened to a resin member provided with a busbar by screw fixation from above. Thus, these are provided as separate members and the number of components increases, so that there is a problem in decrease in the number of assembly steps and size reduction. In the present disclosure, a DC busbar positive electrode, a DC busbar negative electrode, and a shield plate are stacked with non-conductive members interposed therebetween, and are integrated together with AC busbars and sensor cores by resin, to form a busbar assembly. The busbar assembly is provided between the power conversion module and the control board.
1 . A power conversion device comprising:
a power conversion module which includes a switching element and performs power conversion between DC and AC through turning on and off of the switching element;
a DC busbar having a positive electrode and a negative electrode which are connected to DC terminals of the power conversion module and through which DC current is inputted/outputted;
an AC busbar which is connected to AC terminals of the power conversion module and through which AC current is inputted/outputted;
a sensor core for detecting the AC current;
a shield plate; and
a control board including an electronic circuit for performing ON/OFF control of the power conversion module, wherein
the DC busbar includes a flat-plate-shaped DC busbar positive electrode and a flat-plate-shaped DC busbar negative electrode,
the DC busbar positive electrode, the DC busbar negative electrode, and the shield plate are stacked with non-conductive members interposed therebetween, and are integrated together with the AC busbar and the sensor core by non-conductive resin, to form a busbar assembly, and
the busbar assembly is provided between the power conversion module and the control board.
2 . The power conversion device according to claim 1 , wherein
the shield plate has a flat-surface portion covering a predetermined range on the power conversion module where the switching element is present, so that noise generated at the power conversion module flows to a housing.
3 . The power conversion device according to claim 2 , wherein
the shield plate has a bent portion at an end thereof,
the bent portion is covered by the non-conductive resin, and
a surface of the shield plate that is opposed to the control board is exposed from the non-conductive resin.
4 . The power conversion device according to claim 1 , wherein
the shield plate is connected to a housing via a metal collar.
5 . The power conversion device according to claim 4 , wherein
the metal collar is integrated with the busbar assembly by the non-conductive resin.
6 . The power conversion device according to claim 2 , wherein
the shield plate is connected to a housing via a metal collar.
7 . The power conversion device according to claim 6 , wherein
the metal collar is integrated with the busbar assembly by the non-conductive resin.
8 . The power conversion device according to claim 3 , wherein
the shield plate is connected to a housing via a metal collar.
9 . The power conversion device according to claim 8 , wherein
the metal collar is integrated with the busbar assembly by the non-conductive resin.