Rotating electric machine and manufacturing method thereof
View Patent ↗A control device of a rotating electric machine to which an inverter is integrally assembled is downsized, and manufacturing costs are reduced. An inverter for controlling outputs from the rotating electric machine is integrated with a rotating electric machine, and in which a control device forming an inverter is constructed of a switching element and a heat sink, a drain electrode terminal of the switching element is directly joined to the heat sink, and a source electrode terminal and gate electrode terminal of the switching element are joined to a metal pattern formed at a connection member.
1. A rotating electric machine comprising:
a rotor that is fixed to a shaft, and includes a field winding;
a stator that is disposed opposite to said rotor, and includes an armature winding; and
a control device for controlling current flowing through said armature winding;
wherein said control device is formed of switching elements and heat sinks to which said switching elements are joined;
said switching elements each include a planar base part and lead terminal having a polarity different from that of said base part;
said base part is directly and electrically joined to one of said heat sinks, and said lead terminals are joined to a metal pattern formed at a connection member; and
a surface of said one heat sink, to which said base part is directly joined, and a top of said metal pattern are constructed to be substantially in the same plane.
2. The rotating electric machine according to claim 1 , wherein two said switching elements are disposed in opposition, said connection members are disposed in a space between said two elements, and further said connection members are drawn out in the same direction.
3. The rotating electric machine according to claim 1 , wherein a plurality of said switching elements are joined to one heat sink and one connection member.
4. The rotating electric machine according to claim 1 , further comprising a partition wall dividing said lead terminals.
5. The rotating electric machine according to claim 1 , wherein said lead terminals and said metal pattern are made of the same material.
6. The rotating electric machine according to claim 1 , wherein said base part is a drain of a MOSFET, and said lead terminals are the source and gate of the MOSFET.
7. A method of manufacturing a rotating electric machine, comprising a rotor that is fixed to a shaft, and includes a field winding; a stator that is disposed opposite to said rotor, and includes an armature winding; and a control device for controlling current flowing through said armature winding; wherein said control device is formed of switching elements and heat sinks to which said switching elements are joined; said switching elements each include a planar base part and lead terminals having a polarity different from that of said base part; said base part is directly and electrically joined to one of said heat sinks, and said lead terminals are joined to a metal pattern formed at a connection member; and a surface of said one heat sink, to which said base part is directly joined, and a top of said metal pattern are constructed to be substantially in the same plane, said method comprising the steps of:
assembling said connection member to said heat sink;
joining said lead terminals to said metal pattern; and
joining said base part to said heat sink.
8. A method of manufacturing a rotating electric machine, comprising a rotor that is fixed to a shaft, and includes a field winding; a stator that is disposed opposite to said rotor, and includes an armature winding; and a control device for controlling current flowing through said armature winding; wherein said control device is formed of switching elements and heat sinks to which said switching elements are joined; said switching elements each include a planar base part and lead terminals having a polarity different from that of said base part; said base part is directly and electrically joined to one of said heat sinks, and said lead terminals are joined to a metal pattern formed at a connection member; and a surface of said one heat sink to which said base part is directly joined, and a top of said metal pattern are constructed to be substantially in the same plane,
said method comprising the steps of:
joining said lead terminals to said metal pattern; and
assembling said switching element to said heat sink; and joining said base part to said heat sink.