Electrical transmission system

Abstract

The electrical transmission system for a motor vehicle having a traction input, a power electronic system that controls the traction input and a cooling system for cooling the power electronic system. The cooling system is a refrigerator, or possibly a heat pump, with an integrated carburetor and a compressor unit. The electrical transmission system is particularly suitable for urban buses.

1 . Electrical transmission system for motor vehicles, specially urban buses, having a traction input, a power electronic system that controls it and a cooling system for the power electronic system, characterized in that the cooling system is a refrigerator with integrated carburetor and compressor unit.  
     
     
         2 . Transmission system according to  claim 1 , characterized in that said refrigerator is connected via a primary circuit with the parts to be cooled of the power electronic system.  
     
     
         3 . Transmission system according to  claim 1 , characterized in that said refrigerator is connected via a secondary circuit with the parts to be cooled of the power electronic system.  
     
     
         4 . Transmission system according to any one of the preceding claims, characterized in that the cooling system is provided with a terminal for connection with an air-conditioning equipment in the motor vehicle.  
     
     
         5 . Transmission system according to any one of the preceding claims, characterized in that said refrigerator is provided with a terminal for connection with a fuel cell cooling existing in the motor vehicle.  
     
     
         6 . Transmission system according to any one of the preceding claims, characterized in that the cooling system is provided with a terminal for connection with the internal combustion engine cooling existing in the motor vehicle.