초록 ▼

A rotor having a thermal bridge embedded in the rotor for transferring heat released by the commutator of the rotor to the inner bushing of the drive shaft of the electric motor thereby cooling the rotor. The bridge may either be formed of a solid metal piece or a fluid containing conduits; both of

A rotor having a thermal bridge embedded in the rotor for transferring heat released by the commutator of the rotor to the inner bushing of the drive shaft of the electric motor thereby cooling the rotor. The bridge may either be formed of a solid metal piece or a fluid containing conduits; both of which are electrically insulated from the commutator. Orifices are formed in the thermal bridge so that both halfs of the resin molded commutator can be joined together and form a stronger rotor.

대표청구항 ▼

Rotor with commutator-cooling device for electric motors of the type comprising a molded unit having an inner bushing (2) on the driving shaft (6), a current commutator (3) and a winding (5) connected to the commutator (3), wherein cooling is effected by a thermal bridge established between said inn

Rotor with commutator-cooling device for electric motors of the type comprising a molded unit having an inner bushing (2) on the driving shaft (6), a current commutator (3) and a winding (5) connected to the commutator (3), wherein cooling is effected by a thermal bridge established between said inner bushing (2) and said commutator (3) by at least one thermal conductor (1-C1-C2) embedded in the rotor, one part of which is positioned immediately adjacent to said commutator (3) but without contacting it, and the other part of which is in intimate contact with said inner bushing (2) in order to create a transfer of heat from said commutator to said inner bushing.