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Intermediate-frequency programmable digital power supply conversion device

A technology of power conversion and intermediate frequency, which is applied in the direction of output power conversion device, conversion of AC power input to AC power output, conversion of AC power input to DC power output, etc., which can solve the problem of reducing power density, heavy harmonic content, and affecting output Power quality and other issues, to achieve the effect of intuitive and friendly interface

Pending Publication Date: 2021-03-26
SHENYANG AEROSPACE XINGUANG GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the volume and weight of the smoothing device in the AC-DC link account for a large proportion, which reduces the power density and has a heavy harmonic content
At the same time, the power frequency chopping of the thyristor adjusts the effective value of the power supply, and the input current is pulse-like, which will affect the output power quality
Existing power conversion devices cannot be adjusted arbitrarily within the specified frequency range, and the output voltage cannot be adjusted arbitrarily at a certain frequency point
In the control interface and control effect, as well as various parameters of the output voltage, the intuitive and visible effect cannot be achieved.

Method used

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  • Intermediate-frequency programmable digital power supply conversion device
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  • Intermediate-frequency programmable digital power supply conversion device

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Embodiment Construction

[0014] now attached figure 1 And attached figure 2 To further describe the invention, the present invention is aimed at an intermediate frequency 400HZ programmable digital power conversion device for aviation. The frequency conversion power supply can be divided into two parts: the power conversion main circuit and the control system.

[0015] The main circuit of power conversion adopts AC-DC-AC structure, including rectifier, DC filter, inverter unit, AC filter and isolation transformer and other components. Among them, the AC-DC part is an uncontrollable bridge rectifier, which greatly reduces the harmonic content. The AC input power is rectified by the full bridge and filtered by electrolytic capacitors to obtain a stable DC intermediate link. The inverter unit uses IGBT as the switching element, which has the advantages of high switching frequency, large current carrying capacity, and high withstand voltage value. Sinusoidal pulse width modulation (SPWM) is used to co...

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Abstract

The invention discloses an intermediate-frequency programmable digital power supply conversion device, which adopts an AC-DC-AC conversion structure, utilizes a high-performance and reliable PXI industrial personal computer, carries a high-speed and high-precision data acquisition card as a control hardware platform, and adopts virtual instrument LabVIEW software to compile an upper computer control interface. The visual and friendly upper computer monitoring interface can display working parameters and historical curves of the variable-frequency power supply in real time. The intermediate-frequency programmable digital power supply conversion device has the technical effects that the power supply conversion can output three-phase four-wire or single-phase voltage, the voltage can be adjusted at will within a specified frequency range, the output voltage can be adjusted at will at a certain frequency point, and the output voltage frequency is wider.

Description

technical field [0001] The invention relates to the technical field of variable frequency power supplies for aviation, in particular to an intermediate frequency programmable digital power conversion device. Background technique [0002] At present, the AC-DC-AC method is mostly used in the research of power frequency conversion and amplitude conversion. Among them, the volume and weight of the smoothing device in the AC-DC link account for a large proportion, which reduces the power density and has a heavy harmonic content. At the same time, the power frequency chopping of the thyristor regulates the effective value of the power supply, and the input current is pulse-like, which will affect the quality of the output power. Existing power conversion devices cannot be adjusted arbitrarily within the specified frequency range, and the output voltage cannot be adjusted arbitrarily at a certain frequency point. In the control interface and control effect, as well as various pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/458H02M7/5387H02M7/5395H02M1/12
CPCH02M5/458H02M7/53875H02M7/5395H02M1/12
Inventor 赵春雨景月崔再铎祝贺利张一朦
Owner SHENYANG AEROSPACE XINGUANG GRP
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