HDCA100 Series High-temperature AC-DC Power Converters

2022-09-14
●Description:
■HDCA series 100W high-temperature offline AC-DC power converters, specially designed for electronic equipment working in the harsh environment, can continuously work for 2,000 hours at shell temperature 150℃, for 1,000 hours at shell temperature 175℃ and for 500 hours at shell temperature 185℃. With features of being resistant to high temperature, impact and humidity, it is particularly suitable for being used as power supply system for petroleum prospecting logging tool, petroleum drilling instrument, geophysical detecting instrument, vehicles, telecommunication, network infrastructures, enterprise and high-performance calculation, etc.
■HDCA100 series 100W high-temperature AC-DC power converters use the latest thermal design and new semiconductor technology, with its output power density increasing by three times than that of the FHA100 series and the volume reduces by three times, and what’s more, the most important is that its service life doubles. The designed output voltage is 12V, 15V, 18V, 24V, 36V, 48V, and 72V. The output can be either of them and combinations of any two voltages. MOUT is main output terminal and OUT1 is auxiliary output terminal. During the use, the voltage outputted from main output terminal MOUT is most stable. The main output is isolated from the auxiliary output. The output power of the main output is required to be the largest output of the two.
■HDCA100 series 100W high temperature AC-DC power converters’ AC input voltage range is up to AC100V ~ 420V, which is very suitable for oil logging, because the oil logging power supply cable’s resistance is up to 400 ohms. If the downhole cable head voltage is generally required to be 220V AC, in order to make the module output 100W power, then 0.5A current is needed by the calculation with 90% conversion efficiency. In this case, the cable will need to consume 200V voltage, which requires at least 420V ground power supply voltage to deliver 100W power down. In the actual logging, sometimes the load of the downhole equipment is not constant, which causes AC-DC module’s input voltage to change with the change of load. As the power supply voltage cannot be frequently adjusted on the ground with the change of load, which requires AC-DC module bear an AC input of 420V in extreme conditions (with the load empty). As our previous FHA100 series uses a conventional method that results in a maximum withstand voltage of only 247V, it is not suitable for use in ever-changing oil logging situations. It can only be used in situations where the load is constant after normal operation and it needs to strictly monitor the instrument’s cable-head voltage not exceeding 247V. For this reason, HDCA100 series will be the best choice for the oil logging occasions with ever-changing load.
■The temperature resistance of all components adopted by HDCA100 is above +200℃. With the currently best thermal design, the temperature of elements and casing only rises by 9℃ in the condition with good heat radiation, thus it is able to steadily work at ambient temperature +175℃ for a long time. But when temperature of chip exceeds +204℃, overheat protection circuit of chip will be activated and it begins to reduce output power until zero at +210℃. When temperature lagged to +195℃, overheat protection circuit will rest and converter begins to output power again.
■HDCA100 is able to work with full load when casing temperature is less than +175℃ and work with 80% of load at casing temperature +185℃. At ambient temperature +175℃, casing temperature will still reach 180℃ even if good heat radiation is adopted. For this reason, it is suggested to avoid working with full load at ambient temperature above +170℃. 80% of load at most.

Xi'an VAW Electronics

HDCA100 SeriesHDCA100HDCA100--220S12—S12HDCA100-220S15-S36HDCA100-220S12-S24HDCHA100-ACINSMOUT-SOUT1model HDCHA100-ACINSMOUT-SOUT1

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High-temperature AC-DC Power Convertershigh-temperature offline AC-DC power converters

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petroleum prospecting logging tool ]petroleum drilling instrument ]geophysical detecting instrument ]vehicles ]telecommunication ]network infrastructures ]enterprise ]high-performance calculation ]electronic equipment ]

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March 7th, 2017

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