Transport Refrigeration Series Hybrid Power Supply

Abstract

A series hybrid power supply system for a trailer box refrigeration system is disclosed. The trailer box refrigeration system may use either a DC or an ac motor to power the compressor. The power system alternator produces power to power refrigeration system loads.

1 . A series hybrid mobile refrigeration power supply system comprising:
 an engine coupled to an alternator, the alternator configured to provide an alternating current output;   a rectifier bridge coupled to the output of the alternator, the rectifier bridge configured to convert alternating current to direct current;   a distribution bus coupled to the rectifier bridge to distribute direct current to a plurality of mobile refrigeration system loads; and   a direct current compressor motor electrically coupled to the distribution bus using a contactor as a switching device, the contactor energizes the compressor motor when required by refrigeration cooling demand.   
     
     
         2 . The system according to  claim 1  wherein the engine is a gasoline engine. 
     
     
         3 . The system according to  claim 1  wherein the engine a diesel engine. 
     
     
         4 . The system according to  claim 1  wherein the alternator outputs single phase ac. 
     
     
         5 . The system according to  claim 1  wherein the alternator outputs polyphase ac. 
     
     
         6 . An electric transport refrigeration system used to cool a trailer box comprising:
 an engine coupled to an alternator, the alternator configured to provide an alternating current output;   a rectifier bridge coupled to the output of the alternator, the rectifier bridge configured to convert the alternating current to direct current;   a distribution bus coupled to the rectifier bridge to distribute direct current to a plurality of electric transport refrigeration system loads;   an inverter coupled to the direct current bus, the inverter configured to invert the direct current to alternating current; and   an alternating current compressor motor electrically coupled to the inverter using a contactor as a switching device, the contactor energizes the compressor motor when required by refrigeration cooling demand.   
     
     
         7 . The system according to  claim 6  wherein the engine is a gasoline engine. 
     
     
         8 . The system according to  claim 6  wherein the engine a diesel engine. 
     
     
         9 . The system according to  claim 6  wherein the alternator outputs single phase ac. 
     
     
         10 . The system according to  claim 6  wherein the alternator outputs polyphase ac.