Shock and pulse stimulation allows loosening of the near-wellbore formation zone without the danger of long fractures. Compared with conventional hydraulic fracturing technology, the processing is carried out with low material costs, without the use of expensive equipment, with a low probability of pipe bursting.
Existing direct frequency converters (DFC) and frequency converters with a constant current link (FC with DCT) have a number of disadvantages (for DFC - low cosφ, dependent on the power factor of the load, the need to use equalizing chokes or elements to form pauses in the output voltage at joint or separate control, pulsations of the output current form; for FC with DCT - unreliability of two-operation thyristors, complexity of switching thyristors, low efficiency, etc.).
To implement energy recovery to the network in static frequency converters with a DC link containing a voltage inverter, an inverter driven by the network is used.
Modern load benches use a DC machine as a load machine. Stabilization of the DC machine parameters for proper tuning of the entire bench is extremely important ...
Для АСУ технологических процессов Нальчикского гидрометзавода требуется оперативная информация о влажности исходных промпродуктов КШМП. Применяемый в настоящее время термогравиметрический метод требует 4 ч для высушивания промпродуктов при температуре 105°С до постоянного веса ...
