Electrical transport refrigeration system

An electrically powered refrigeration module of a transport refrigeration unit comprising:

• an electrically powered compressor including a first stage compressor, a second stage compressor, and an inter-cooler positioned between the first stage compressor and the second stage compressor;
• an evaporator equipped with a first electric blower;
• and
• an electrically controlled expansion valve configured to control a refrigerant flow into the evaporator;
• wherein the electrically powered first compressor, the electrically powered second compressor, the inter-cooler, the evaporator and the electrically controlled expansion valve are configured to form a refrigeration circuit,
• a power regulator circuit configured to, while in transport, receive power solely from an electric power supply and configured to supply DC and AC power having variable voltages and/or frequencies to the electrically powered compressor, the first electric blower, and the electrically controlled expansion valve so as to power the electrically powered refrigeration module.

An electrically powered refrigeration module of a transport refrigeration unit comprising:

• an electrically powered refrigeration circuit that provides temperature control to a transport unit, the electrically powered refrigeration circuit including:
• a CO2 compressor including a first compression stage and a second compression stage;
• the CO2 compressor including an inter-cooler positioned between the first compression stage and the second compression stage;
• an electrically controlled expansion valve configured to control a refrigerant flow into an evaporator;
• and
• a power regulating circuit that powers the electrically powered refrigeration circuit, wherein the power regulating circuit, while in transport, receives power solely from an electric power supply and wherein the power regulating circuit is configured to provide a AC power having a variable voltage or frequency to the CO2 compressor and a DC power having a variable voltage to the electrically controlled expansion valve so as to power the electrically powered refrigeration module.