TIME SHARING CONTROL OF TRANSPORT REFRIGERATION SYSTEM

A transportation refrigeration system 200 including: a transportation refrigeration unit comprising a motor 32; a power conversion unit 26 configured convert an amplitude, a frequency and a phase of an input electrical power signal, wherein the power conversion unit 26 comprises a first power bridge 262, a DC link 264 and a second power bridge 266; an energy storage device 24 configured to supply electrical power to the motor 32 via the power conversion unit 26 during a road mode; a first switch 302 configured to selectively connect the first power bridge 262 to the energy storage device 24 or the motor 32; and a second switch 304 configured to selectively connect the second power 266 bridge to the motor 32 or a power grid 30; wherein the first switch 302 and second switch 304 are positioned to connect the first power bridge 262 and second power bridge 266 to specified sources and outputs during each of the road mode and the standby mode.