Electrical device and method of assembling such an electrical device

A method of assembling an electrical device for controlling an electric machine, comprising:

• filling a first zone with a first insulating material,
• wherein the first zone comprises a first circuit board comprising a first plurality of electronic elements and
• wherein the first circuit board is completely surrounded by the first insulating material;
• connecting at least one electrical connection element, in which a first end is connected to a second circuit board
• wherein the first end is opposite to a second end connected to the said first circuit, board,
• wherein the at least one electrical connection element is partially surrounded by the first insulating material;
• filling a second zone and a third zone with a second insulating material,
• wherein the second zone comprises a second circuit board comprising a second plurality of electronic elements,
• wherein the second circuit board is completely surrounded by the second insulating material, and
• wherein the at least one electrical connection element is partially surrounded by the second insulating material in an entirety of a part of the at least one electrical connection that is not partially surrounded by the first insulating material,
• wherein the electrical connection element connects the first circuit board with the second circuit board,
• wherein the first zone and the second zone are each in contact with the third zone so that the electrical device comprises at least one space extending around the third zone and between the first zone and the second zone,
• wherein the third zone is defined at least in part by a hollow column into which the electrical connection element is intended to be inserted, the hollow column extending between the first and the second zone, and
• wherein the hollow column is filled with the second insulating material.

An electrical device for controlling an electric machine, comprising:

• a first zone filled with a first insulating material;
• a first circuit board comprising a first plurality of electronic elements,
• wherein the first zone comprises the first circuit board completely surrounded by the first insulating material;
• a second zone filled with a second insulating material;
• a second circuit board comprising a second plurality of electronic elements,
• wherein the second zone comprises the second circuit board completely surrounded by the second insulating material;
• a third zone filled with the second insulating material;
• an electrical connection element;
• a first protective support;
• and
• a second protective support,
• wherein the electrical connection element connects the first circuit board with the second circuit board, and
• wherein the first zone and the second zone are each in contact with the third zone so that the electrical device comprises at least one space extending around the third zone and between the first zone and the second zone,
• wherein the first zone is covered by the first protective support,
• wherein the second zone and the third zone are covered by the second protective support, and
• wherein the first protective support and the second protective support are distinct from each other.