TRANSPORTATION REFRIGERATION UNIT WITH AC GENERATOR CHARGING OF PRIME MOVER ENERGY STORAGE DEVICE

A transportation refrigeration unit TRU (26) and power system. The TRU (26) and power system include a compressor (58) configured to compress a refrigerant, an evaporator heat exchanger (76) operatively coupled to the compressor (58) , and an evaporator fan (78) configured to provide return airflow (134) and flow the return airflow (134) over the evaporator heat exchanger (78). The system also includes a return air temperature RAT sensor (142) disposed in the return airflow (134) and configured measure the temperature of the return airflow (134), a TRU controller (82) operably connected to the RAT sensor (142) and configured to execute a process to determine an AC power requirement for the TRU (26) based on at least the RAT; a generator power converter (164) configured to receive a generator three phase AC power (163) and provide DC power (165b) to an energy storage system (150), a power management system (124), the power management system (124) configured to direct power the TRU (26) based on the AC power requirement.