Power transformation frequency converter

Abstract

The invention discloses a power transformation frequency converter. The invention discloses a power transformation frequency converter. The converter comprises a wire inlet chamber which comprises a plurality of wiring chambers and is used for being in butt joint with a cable so as to receive and output a plurality of paths of three-phase alternating currents with different voltage values; a rectifying unit which is used for converting the three-phase alternating currents output from the wire inlet chamber into direct currents; an inversion unit which is used for converting the direct currentsoutput by the rectifying unit into alternating currents of which the frequency is different from that of the three-phase alternating currents received by the wire inlet chamber, and a control unit which is used for controlling the inversion unit to output the alternating currents of different frequencies. According to the power transformation frequency converter, two sets of cable input systems with different voltages are arranged, so that the power transformation frequency converter can meet the use of double power supplies, and the application range of the power transformation frequency converter is expanded. In addition, the power transformation frequency converter also adopts an integrated skid-mounted structure, so that the equipment is convenient to install, move and maintain.

Description

technical field [0001] The present invention relates generally to the field of frequency conversion applications. More specifically, the present invention relates to a power conversion frequency converter. Background technique [0002] In the field of oil and natural gas exploration, equipment such as oil or shale gas on-site fracturing pumps or water injection pumps are often used, and when the motor is driving the above-mentioned fracturing pumps or water injection pumps, it will inevitably encounter problems related to starting, speed regulation and braking. movement etc. For example, for the speed regulation of the motor, it is required to artificially change the speed of the motor according to the needs of production under a certain load, so that the fracturing pump or water injection pump driven by it can work more efficiently. The quality of motor speed regulation often affects production efficiency and product quality. At present, there are usually methods such as...

AI Technical Summary

Problems solved by technology

However, the inverters currently on the market usually only have a single voltage level power input, which cannot meet the application of multiple voltage level power supplies

Therefore, the existing frequency converter has limited its application range and scenarios due to the single input power supply

Secondly, due to the large number of components and scattered layout of the existing substation frequency converter, its overall volume and weight are large, and its installation is complicated, it is difficult to move, and it is also difficult to repair and maintain

In addition, during the operation of the substation frequency converter, the power device generates serious heat, but the existing technology is often not ideal for heat dissipation and cooling, which seriously affects the operation performance of the substation frequency converter

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