BUSBAR ASSEMBLY, INVERTER DEVICE AND ELECTRIC DRIVE FOR DRIVING A VEHICLE
A busbar assembly includes at least two busbars each having a current flow direction and a cross-sectional area with regard to the current flow direction, the cross-sectional area having opposing first and second long sides and two opposing small sides, each busbar having a through-hole extending from the first long side to the second long side. An insulating body surrounding the long sides and the small sides of each busbar along a part of the current flow direction and forming an opening for each busbar on the first long side so as to allow access to the through-hole. The insulating body forms a collar extending away from the first long side and surrounding the openings.
1 . Busbar assembly, comprising
at least two busbars each having a current flow direction and a cross-sectional area with regard to the current flow direction, the cross-sectional area having opposing first and second long sides and two opposing small sides, each busbar having a through-hole extending from the first long side to the second long side; and
an insulating body surrounding the long sides and the small sides of each busbar along a part of the current flow direction and forming an opening for each busbar on the first long side so as to allow access to the through-hole;
wherein the insulating body forms a collar extending away from the first long side and surrounding the openings.
2 . Busbar assembly according to claim 1 , wherein
the collar surrounds a single clearance around the openings.
3 . Busbar assembly according to claim 1 , wherein
the collar comprises first and second wall sections opposing each other with regard to the current flow direction, the first wall section having a recess pointing towards the second wall section between each pair of adjacent openings.
4 . Busbar assembly according to claim 3 , wherein
for each recess of the first wall section, the second wall section has a recess pointing towards the recess of the first wall section.
5 . Busbar assembly according to claim 1 , wherein
the insulating body encapsulates a free end with respect to the current flow direction of each busbar.
6 . Busbar assembly according to claim 1 , wherein
each busbar comprises a further through-hole extending from the first long side to the second long side and not being covered by the insulating body.
7 . Busbar assembly according to claim 1 , wherein
the insulating body comprises a though-hole arranged outside the collar between each pair of adjacent busbars.
8 . Busbar assembly according to claim 1 , wherein
the busbars are arranged such that in each pair of adjacent busbars the small sides face each other.
9 . Busbar assembly according to claim 1 , wherein
the busbar assembly with provided with three busbars.
10 . Inverter device, comprising
an inverter housing structure having an assembly opening;
an inverter circuit having two terminals being an AC terminal and a DC terminal; and
a busbar assembly according to claim 1 ;
wherein the busbar assembly is connected to one of the terminals and the openings of the insulating body are positioned to allows access to the though-holes of the busbars through the assembly opening.
11 . Inverter device according to claim 10 , further comprising
fastening means, in particular screws, each having a shaft and a head and each extending through one of the thorough-holes, the collar and the assembly opening forming a gap therebetween, the gap being smaller than a diameter of the head.
12 . Inverter device according to claim 10 , further comprising
a printed circuit board, the collar being arranged between the assembly opening and the printed circuit board.
13 . Inverter device according to claim 10 , wherein
the busbar assembly is connected to the AC terminal.
14 . Electric drive for driving a vehicle, the electric drive comprising:
a housing with a machine housing structure;
an inverter device according to claim 10 ; and
a rotating electric machine arranged inside the machine housing structure;
wherein the inverter housing structure forms part of the housing of the electric drive, wherein the inverter device is configured to supply the electric machine with a multiphase AC voltage via the AC terminal.
15 . Vehicle, comprising an electric drive according to claim 14 configured to drive the vehicle.
16 . Busbar assembly according to claim 2 , wherein
the collar comprises first and second wall sections opposing each other with regard to the current flow direction, the first wall section having a recess pointing towards the second wall section between each pair of adjacent openings.
17 . Busbar assembly according to claim 2 , wherein
the insulating body encapsulates a free end with respect to the current flow direction of each busbar.
18 . Busbar assembly according to claim 2 , wherein
each busbar comprises a further through-hole extending from the first long side to the second long side and not being covered by the insulating body.
19 . Busbar assembly according to claim 2 wherein
the insulating body comprises a though-hole arranged outside the collar between each pair of adjacent busbars.
20 . Busbar assembly according to claim 2 , wherein
the busbars are arranged such that in each pair of adjacent busbars the small sides face each other.