| abstract |
A transport refrigeration system includes a compressor having discharge and suction ports and at least one electric compressor drive motor disposed within the compressor. The system includes a condenser heat exchanger unit and an evaporator heat exchanger unit operatively coupled, respectively, to the compressor discharge port and the compressor suction port. At least one fan assembly having an electric fan motor is configured to provide air flow over at least one of the heat exchanger units. The system includes an integrally mounted unitary engine driven synchronous generator assembly, which is configured to selectively produce at least one A.C. voltage at one or more frequencies. The compressor drive motor and the at least one fan motor are configured to be directly coupled to the synchronous generator and to operate at a voltage and frequency produced thereby. The compressor is provided with means for unloading at least a portion of the compressor's compressing capability. Controls for the system are provided for selectively energizing the means for unloading the compressor during certain operating conditions of the refrigeration system, such as during start up of the compressor. |