Middle-high voltage frequency converter circulating cooling device for mining
A medium and high voltage frequency converter, circulation cooling technology, applied in the direction of output power conversion device, cooling/ventilation/heating transformation, electrical components, etc., can solve the problem that the oil cooling method cannot be used, and the use of oil-filled electrical equipment is not allowed.
Active Publication Date: 2013-12-04
SHANXI KEDA AUTOMATION CONTROL
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(4) Oil-cooled heat dissipation Although the heat dissipation efficiency of oil-cooled radiators is not as high as that of water-cooled methods, it has been widely used in ordinary high-power inverters due to its high electrical insulation and electromagnetic shielding effects, but its cost and environmental impact The requirements have gradually faded out these years, and according to coal mine safety regulations, oil-filled electrical equipment is not allowed to be used underground in coal mines, and oil-cooled heat dissipation methods cannot be used in coal mines
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[0020] In order to understand the present invention and its advantages more fully, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0021] Such as figure 1 , 2 As shown, the cold air in the explosion-proof cavity enters the cold air channel and passes through the power module of the inverter, then becomes hot air and enters the hot air channel. A centrifugal fan is installed at the bottom of the hot air channel to draw out the hot air in the hot air channel and send it to the heat sink at the same time. The heat exchange channel, the hot air becomes cold air after passing through the radiator, and enters the cold air channel. An axial flow fan is installed at the mouth of the cold air channel, and the cold air is sent into the cold air ch...
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The invention provides a forcibly-circulating cooling radiating device and method in order to solve the radiating problem of a middle-high voltage frequency converter for mining, the power of the frequency converter can reach 3000kW, and the requirements for mine production can be effectively met. The method comprises the steps that a circulating air flow channel is established, and forcible circulating of air is established. The device comprises a radiator. After cold air enters a frequency converter power module, first-time heat exchanging is carried out, module cooling is achieved, after the cold air passes through the radiator, second-time heat exchanging is carried out, heat is transmitted to the radiator, hot air is turned into cold air, air is forcibly driven to flow in a circulating mode through a fan, and cooling of the frequency converter is achieved.
Description
technical field [0001] The invention relates to a cooling device and method for medium and high voltage frequency converters used in mines, in particular to the cooling of cascaded high-power frequency converters, and provides a circulating cooling method for medium and high voltage frequency converters used in mines. Background technique [0002] In recent years, the development of power electronics and automatic control technology has also promoted the upgrading of coal mine production equipment. In order to meet the requirements of energy saving and safety production in coal mines, more and more flameproof frequency converters are used in coal mines, and require extremely high reliability. The high-power motors of mechanical equipment in coal mines generally adopt frequency conversion speed regulation, which can significantly improve the applicability of mechanical equipment to working conditions, thereby improving productivity and saving a lot of electric energy. Due to...
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Inventor 苗焰青杨绍鹏张建东贾华忠郭凯李晓明张志峰
Owner SHANXI KEDA AUTOMATION CONTROL