A converter with a DC link for converting an input voltage into an alternating voltage with a pre-determined amplitude and frequency for driving a single or multiple-phase load may include a number of modules which are stackable over one another. Each module may have a ceramic cooling body with a receiving surface on which electronic components of one phase are mounted, wherein the ceramic cooling body has channel(s) in the region of the receiving surface for carrying a coolant during the operation of the converter The converter may include a DC link capacitor and input-side and output-side power connections arranged on a first carrier having a arranged perpendicular to the receiving surface. The converter may also include a control unit for driving the electronic components of the phase, the control unit being arranged on a second carrier having a main plane arranged perpendicularly to the plane of the receiving surface.

Converter With DC Link

The invention provides an outdoor installation box of a communication device. The outdoor installation box applied to outdoor instillation of a communication device comprises a mounting bracket and acooling plate arranged at the bottom of the mounting bracket. A box body in a cubic shape is arranged at the outermost side of the mounting bracket; a mounting base is arranged on the mounting bracketand is used for installing a communication device; and the cooling plate is connected with the mounting bracket. A cooling medium passage is arranged in the middle of the cooling plate and is used for flowing of a cooling medium. And a solar battery assembly placing slot is formed in the box body at the outermost side. Therefore, a problem that the temperature is not stable in the outdoor installation box for the existing communication device is solved, so that the communication device can work in a stable temperature range when being installed outdoors; high temperature generation due to thesunlight irradiation is prevented; with the solar energy for power supply, the energy consumption is saved; and the temperature is kept and energy consumption is reduced.

Outdoor installation box of communication device

An example electrical and liquid coolant midplane includes an electrical midplane having a ring bus bar assembly, a liquid coolant manifold, and a heat transfer device. The ring bus bar assembly is to receive power from power supply units of the computing system and provide the power to computing components installed in the computing system. The liquid coolant manifold includes four segments connected together as a rectangular ring, the liquid coolant manifold including first liquid connectors facing in a first direction and second liquid connectors facing in a second direction opposite the first direction. The heat transfer device is in contact with the ring bus bar assembly and one of the segments of the liquid coolant manifold, to thermally couple the ring bus bar assembly with the manifold to provide liquid cooling to the ring bus bar assembly.

Electrical and liquid cooling midplane

A fan drive circuit for a variable speed fan motor in a cooling system, includes an inverter configured to supply a current signal to stator windings of the variable speed fan motor, a frequency detection circuit coupled to an output stage of an inverter of a compressor motor of the cooling system and configured to detect a first frequency of a compressor current signal at the output stage of a variable speed compressor drive circuit and generate a frequency signal, and a digital signal processor (DSP) coupled to the inverter and the frequency detection circuit. The DSP is configured to receive the frequency signal corresponding to the first frequency from the frequency detection circuit, select a second frequency corresponding to the first frequency at which to operate the variable speed fan motor, and transmit control signals to the inverter to supply current to the stator windings at the second frequency.

Drive circuit for a variable speed fan motor

The present disclosure describes a connector assembly for a liquid manifold within a server rack The connector assembly includes a pipe configured to connect to the liquid manifold The pipe has a flexible portion configured to accommodate at least one of lateral or vertical manipulation of the pipe while the pipe remains connected to the liquid manifold The connector assembly further includes a first connector and a second connector configured to form a liquid-tight connection when coupled together One of the first connector and the second connector is connected to a distal end of the pipe The other of the first connector and the second connector is configured to connect to a component within the server rack, for supplying coolant from the liquid manifold to the component

Connector assembly and server rack

A variable speed drive includes a converter connected to an AC power source, a DC link connected to the converter, and an inverter connected to the DC link. The inverter converts DC voltage into an output AC power having a variable voltage and frequency. The inverter includes at least one power electronics module and associated control circuitry; a heat sink in thermal communication with the power electronics module and in fluid communication with a manifold. The manifold includes a tubular member having at least one vertical member portion and at least one horizontal member portion in fluid communication. A plurality of ports conduct cooling fluid into and out of the manifold. A bracket attaches the manifold to a structural frame. Brackets are provided for attachment of power electronics modules to the manifold.

Structural frame cooling manifold

A cooling system for a variable speed drive

A variable speed drive includes a converter connected to an AC power source, a DC link connected to the converter, and an inverter connected to the DC link The inverter converts DC voltage into an output AC power having a variable voltage and frequency The inverter includes at least one power electronics module and associated control circuitry; a heat sink in thermal communication with the power electronics module and in fluid communication with a manifold The manifold includes a tubular member having at least one vertical member portion and at least one horizontal member portion in fluid communication A plurality of ports conduct cooling fluid into and out of the manifold A bracket attaches the manifold to a structural frame Brackets are provided for attachment of power electronics modules to the manifold

Variable speed drive system and cooling system

A variable speed drive includes a converter connected to an AC power source, a DC link connected to the converter, and an inverter connected to the DC link. The inverter converts DC voltage into an output AC power having a variable voltage and frequency. The inverter includes at least one power electronics module and associated control circuitry; a heat sink in thermal communication with the powerelectronics module and in fluid communication with a manifold. The manifold includes a tubular member having at least one vertical member portion and at least one horizontal member portion in fluid communication. A plurality of ports conduct cooling fluid into and out of the manifold. A bracket attaches the manifold to a structural frame. Brackets are provided for attachment of power electronicsmodules to the manifold.

variable speed drive system and cooling system for heat generation electronic device sealed in housing

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Structural frame cooling manifold

A cooling system for a variable speed drive

Variable speed drive system and cooling system

variable speed drive system and cooling system for heat generation electronic device sealed in housing