Insulated wire

1. An insulated wire, comprising:

an aluminum conductor; and

a first insulating film, wherein said first insulating film is in contact with said aluminum conductor, the first insulating film consisting essentially of a first polyimide obtained by reacting an acid component with a diamine component, the acid component consisting essentially of, with respect to 100 mol % of the acid component:

60 mol % to 70 mol % of 3,3′,4,4′-biphenyl tetracarboxylic dianhydride (BPDA),

10 mol % to 15 mol % of 3,3′,4,4′-benzophenone tetracarboxylic dianhydride (BTDA),

and 25 mol % to 30 mol % of pyromellitic dianhydride (PMDA), and

the diamine component consisting essentially of 90 mol % or greater of 4,4-diaminodiphenyl ether.

2. The insulated wire according to claim 1 , wherein the first polyimide has a glass transition point (T g ) of 250° C. to 350° C.

3. The insulated wire according to claim 1 , wherein the first insulating film has a thickness of 10 μm to 200 μm.

4. The insulated wire according to claim 1 , further comprising a second insulating film provided on the first insulating film, the second insulating film being made of a second polyimide.

5. The insulated wire according to claim 1 , wherein the conductor is a rectangular conductor.

6. The insulated wire according to claim 5 , wherein the rectangular conductor has a rectangular cross section of 2.0 mm to 7.0 mm in width and 0.7 mm to 3.0 mm in thickness.

7. The insulated wire according to claim 1 , wherein the acid component consists of 60 mol % BPDA, 15 mol % BTDA and 25 mol % PMDA.