Abstract: A power electronics unit, a vapor compression system incorporating the power electronics unit, and a method of cooling a power electronics unit are provided. The power electronics unit includes a semiconductor portion and an inductor portion. Approximately 80% of the heat generated by the power electronics unit may be derived from the semiconductor portion. Approximately 20% of the heat generated by the power electronics unit may be derived from the inductor portion. The semiconductor portion is cooled using at least one fan. The inductor portion is cooled using a working fluid (e.g., a refrigerant). The working fluid may be provided from upstream of the evaporator in the vapor compression system. Limiting the use working fluid to only cool the inductor portion of the power electronics unit may minimize the impact of the power electronics unit on the vapor compression system.

Abstract: A multi-unit transport refrigeration system including: a first transportation refrigeration unit configured to refrigerate a first transport container; a second transportation refrigeration unit configured to refrigerate a second transport container; and an energy management system including: an energy storage device configured to store electricity to power the first second transportation refrigeration unit; and a power conversion system electrically connecting the energy storage device to the first transportation refrigeration unit and the second transportation refrigeration unit, the power conversion system including: a first DC/DC converter configured to increase a voltage of the electricity received from the energy storage device from a first voltage to a second voltage; and a first DC/AC inverter configured to convert the electricity received from the first DC/DC converter from DC to AC and then convey the electricity to at least one of the first transportation refrigeration unit or the second transporta

Abstract: Systems for operating a rectifier are provided. Aspects include a rectifier including a set of bridge structures configured to receive an input current of a power supply, wherein each bridge structure in the set of bridge structures includes a set of diodes and a set of active switches, wherein each active switch in the set of active switches is configured to provide a parallel path around each diode in the set of diodes when in a PWM state, a controller configure to determine a threshold current for the rectifier and operate one or more active switches in the rectifier in a PWM state based on the input current being less than the threshold current.

Abstract: A power electronics unit, a vapor compression system incorporating the power electronics unit, and a method of cooling a power electronics unit are provided. The power electronics unit includes a semiconductor portion and an inductor portion. Approximately 80% of the heat generated by the power electronics unit may be derived from the semiconductor portion. Approximately 20% of the heat generated by the power electronics unit may be derived from the inductor portion. The semiconductor portion is cooled using at least one fan. The inductor portion is cooled using a working fluid (e.g., a refrigerant). The working fluid may be provided from upstream of the evaporator in the vapor compression system. Limiting the use working fluid to only cool the inductor portion of the power electronics unit may minimize the impact of the power electronics unit on the vapor compression system.

Abstract: A voltage conversion system includes an energy storage device; a power conversion unit connected to the energy storage device, the power conversion unit comprising: an inductor, the inductor comprising a number of coils that are non-coupled or weakly coupled, with a coupling coefficient less than 0.05; a multi-phase boost stage coupled to the inductor, wherein the multiphase boost stage comprises a number of phases that equals the number of coils; an inverter coupled to the multiphase boost stage; and a load coupled to the power conversion unit.

Abstract: A power system architecture configured to power a transport refrigeration system (20) based on a determined an AC power requirement. The system (20) includes a generator power converter (164) configured to receive the generator three phase AC power (163) from an AC generator (162), and provide a generator DC power (165). The system (20) also includes a grid power converter (184) configured to receive the grid three phase AC power from a grid power source (182), and provide a grid DC power (185), an energy storage device (152), the energy storage device (152) operable to provide a DC power (157) and connected to a variable DC bus, and a power management system (190) operably connected to direct power (195) the TRU (26) based on at least the AC power requirement.

Abstract: A system and method for recharging a vehicle battery and a refrigeration unit battery with a charging station using a unified charging port are provided. The charging port is configured to receive electrical power from the charging station. The vehicle power train system and the refrigeration unit system are configured to be in connection with the charging port. The vehicle power train system receives electrical power from the charging station and stores the electrical power, at a vehicle power train system voltage, in a vehicle battery. The refrigeration unit system receives electrical power from the charging station and stores the electrical power, at a refrigeration unit system voltage, in a refrigeration unit battery. The refrigeration unit system, in the refrigeration electrical system, converts the electrical power from the refrigeration unit battery to mechanical energy.

Abstract: Systems for operating a rectifier are provided. Aspects include a rectifier comprising a set of bridge structures configured to receive an input current of a power supply, wherein each bridge structure in the set of bridge structures comprises a set of diodes and a set of active switches, wherein each active switch in the set of active switches is configured to provide a parallel path around each diode in the set of diodes when in a PWM state, a controller configure to determine a threshold current for the rectifier and operate one or more active switches in the rectifier in a PWM state based on the input current being less than the threshold current.

Abstract: A transportation refrigeration system including: a transportation refrigeration unit including a compressor, one or more valves, and a controller; an energy storage device configured to provide electrical power to the transportation refrigeration unit; and an intelligent charging connector in electrical communication with the energy storage device and/or the transportation refrigeration unit, the intelligent charging connector being connectable to a power grid and being configured to selectively control a provision of electrical power to the transportation refrigeration unit from the energy storage device and/or the power grid by transitioning the provision of electrical power to the transportation refrigeration unit from being supplied by the energy storage device or the power grid in response to the intelligent charging connector being connected to the power grid or in conjunction with the intelligent charging connector being disconnected from the power grid, respectively.

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

Abstract: An exemplary heating ventilation and cooling (HVAC) system includes a multi-phase power input, an AC-DC rectifier connected to a DC-AC inverter via a DC power bus, a multi-phase power output connecting the DC-AC inverter to a fan blower motor, and at least one redundancy power system. The redundancy power system is configured to bypass at least one of the AC-DC rectifier and the DC-AC inverter.

Abstract: An electrical system includes a power electronics system and a bus bar coupled to the power electronic system. The power electronics system includes a switching device configured to selectively connect and disconnect. The bus bar includes a first conductive layer and a second conductive layer. The first conductive layer is disposed directly adjacent a first insulation layer, wherein the first conductive layer is configured to conduct a first polarity of electrical power to, from, or both the power electronics system. The second conductive layer is disposed directly adjacent the first insulation layer, and is configured to conduct a second polarity of electrical power opposite the first polarity to, from, or both the power electronics system. The first conductive layer comprises a first thickness half a second thickness of the second conductive layer.

Abstract: An electrical system includes a power electronics system and a bus bar coupled to the power electronic system. The power electronics system includes a switching device configured to selectively connect and disconnect. The bus bar includes a first conductive layer and a second conductive layer. The first conductive layer is disposed directly adjacent a first insulation layer, wherein the first conductive layer is configured to conduct a first polarity of electrical power to, from, or both the power electronics system. The second conductive layer is disposed directly adjacent the first insulation layer, and is configured to conduct a second polarity of electrical power opposite the first polarity to, from, or both the power electronics system. The first conductive layer comprises a first thickness half a second thickness of the second conductive layer.

Abstract: In the field of high voltage direct current (HVDC) power transmission a line commutated converter (10) includes a plurality of converter limbs (12A, 12B, 12C) that extend between first and second DC terminals (16, 18). Each converter limb (12A, 12B, 2C) includes first and second limb portions (22, 24) that are separated by an AC terminal (26). The first limb portions (22) together define a first limb portion group (28) and the second limb portions (24) together define a second limb portion group (30). Each limb portion (22, 24) includes at least one switching element (32) in the form of a latching device (34). Each latching device (34) is configured to turn on and conduct current when it is forward biased and it receives a turn on signal, to naturally turn off and no longer conduct current when it is reverse biased and the current flowing through it falls to zero, and to actively turn off and prevent current from flowing therethrough when it receives a turn off signal.

Abstract: A heat sink for cooling an electronic component includes a substrate comprising an electrically non-conductive material and an inlet port and an outlet port extending outward from the substrate. The inlet and outlet ports are fluidically coupled to a fluid flow surface of the heat sink by passages that extend through a portion of the substrate. The heat sink also includes a shield comprising an electrically conductive material. The shield is disposed atop or within the substrate and is configured to suppress electromagnetic interference generated by an electronic component coupled to the heat sink.

Abstract: A device for cooling an electronic component includes a substrate having a component mounting surface and a fluid flow surface recessed relative to the component mounting surface. The device also includes an inlet orifice positioned proximate a first end of the fluid flow surface and an outlet orifice positioned proximate a second end of the fluid flow surface. A pattern of surface features is arranged on the fluid flow surface. The pattern of surface features is configured to entrain a coolant flowing across the fluid flow surface and redirect the coolant upward and away from the fluid flow surface.

Abstract: A power generation architecture includes a plurality of photovoltaic blocks and a medium voltage direct current MVDC electrical power collector. Each photovoltaic (PV) block includes a plurality of PV groups and a combiner. Each plurality of PV groups includes a plurality of PV strings and a DC to DC power converter. Each PV string is operable to output low voltage, DC electrical power. The DC to DC power converter is operable to convert the low voltage, DC electrical power to medium voltage, DC electrical power. The combiner is operable to combine the medium voltage DC electrical power of the DC to DC power converters to produce a block output. The MVDC collector is operable to combine each block output.

Abstract: A voltage converter may include a first set of silicon (Si)-based power devices coupled to a first direct current (DC) voltage source and a second set of Si-based power devices coupled to a second DC voltage source. The voltage converter may also include a first set of silicon-carbide (SiC)-based power devices coupled to the first set of Si-based power devices and to the second set of Si-based power devices. Each SiC-based power device of the first set of SiC-based power devices may switch at a higher frequency as compared to each Si-based power device of the first and second sets of the Si-based power electronic devices.

Abstract: An electrical system includes a power electronics system and a bus bar coupled to the power electronic system. The power electronics system includes a switching device configured to selectively connect and disconnect. The bus bar includes a first conductive layer and a second conductive layer. The first conductive layer is disposed directly adjacent a first insulation layer, wherein the first conductive layer is configured to conduct a first polarity of electrical power to, from, or both the power electronics system. The second conductive layer is disposed directly adjacent the first insulation layer, and is configured to conduct a second polarity of electrical power opposite the first polarity to, from, or both the power electronics system. The first conductive layer comprises a first thickness half a second thickness of the second conductive layer.

Abstract: An electrical system includes a power electronics system and a bus bar coupled to the power electronic system. The power electronics system includes a switching device configured to selectively connect and disconnect. The bus bar includes a first conductive layer and a second conductive layer. The first conductive layer is disposed directly adjacent a first insulation layer, wherein the first conductive layer is configured to conduct a first polarity of electrical power to, from, or both the power electronics system. The second conductive layer is disposed directly adjacent the first insulation layer, and is configured to conduct a second polarity of electrical power opposite the first polarity to, from, or both the power electronics system. The first conductive layer comprises a first thickness half a second thickness of the second conductive layer.