Motor and drive arrangement for refrigeration system

A heat transfer system comprising:

• a first two-phase heat transfer fluid vapor/compression circulation loop including:
• a compressor;
• a heat exchanger assembly including:
• a heat exchanger coil circulating a first heat transfer fluid therethrough;
• a fan at least partially surrounded by the heat exchanger coil to cause a flow of air through the heat exchanger coil to exchange thermal energy from the first heat transfer fluid to the flow of air;
• a brushless direct current fan motor disposed at the fan to urge rotation of the fan;
• and
• an ancillary electrical component operably connected to the first heat transfer fluid circulation loop electrically isolated from the first heat transfer fluid;
• an expansion device;
• and
• a heat absorption/rejection side of an internal heat exchanger evaporator/condenser;
• wherein a first conduit in a closed fluid circulation loop circulates the first heat transfer fluid therethrough;
• and
• a second two-phase heat transfer fluid circulation loop that exchanges heat to the first heat transfer fluid circulation loop through the heat exchanger evaporator/condenser, including:
• a heat rejection heat exchanger;
• a liquid pump disposed vertically lower than the internal heat exchanger;
• and
• a heat absorption heat exchanger;
• wherein a second conduit in a closed fluid circulation loop circulates a second heat transfer fluid therethrough.