CN101944854A

CN101944854A - Novel frequency conversion device

Info

Publication number: CN101944854A
Application number: CN2010102408229A
Authority: CN
Inventors: 庞登元
Original assignee: Shenzhen Antuoshan Technology Co Ltd
Current assignee: Shenzhen Antuoshan Technology Co Ltd
Priority date: 2010-07-29
Filing date: 2010-07-29
Publication date: 2011-01-12

Abstract

The invention relates to a novel frequency conversion device which is characterized in that a device body comprises a U-phase power frequency conversion module, a V-phase power frequency conversion module, a W-phase power frequency conversion module, a DSP control and drive module and an output switch, wherein the DSP control and drive module is respectively connected with the U-phase power frequency conversion module, the V-phase power frequency conversion module and the W-phase power frequency conversion module, and the U-phase power frequency conversion module, the V-phase power frequency conversion module and the W-phase power frequency conversion module are respectively connected with the output switch. The invention can be conveniently combined into a three-phase input/three-phase output mode, a single-phase input/three-phase output mode or a single-phase input/single-phase output mode. By adopting a modular design structure, the invention simplifies the selection of the power device, is beneficial to cost reduction and can be easily passed by electromagnetic interference test.

Description

A kind of novel converter plant

Technical field

The present invention relates to a kind of power conversion device, especially a kind of novel converter plant.

Background technology

In some field construction operations, often use Blast Furnace Top Gas Recovery Turbine Unit (TRT), as wind power generation, diesel power generation etc., usually the voltage of electricity generation system output is two-phase or three-phase alternating voltage, and generally all in a bigger scope, fluctuate, can not directly offer external electronic device uses, all need in the practical application through a converter plant, the main effect of converter plant is exactly that unsettled voltage transitions is become fixing phase voltage, offers relevant power consumption equipment then or inputs to electrical network.

Power consumption equipment or electrical network are at present commonly used two kinds of three-phase and two-phases.In general use, need provide diverse two complete equipments, change according to the distinct device of applied power also needs in addition at different application.Angle from research and development of products, increase along with applied power, semiconductor power switch device switch under the high-voltage great-current condition is easy to produce Voltage and Current Spikes, cause component life to reduce, in order to prevent to damage, need to promote the performance of each electronic device, increased the selection difficulty, cost raises.The variation of simultaneously big electric current also is easy to generate bigger electromagnetic interference, and control system of influence own or extraneous stability of closing on electronic equipment suppress difficulty and strengthens.

Summary of the invention

At the weak point that exists in the above-mentioned technology, the invention provides and a kind ofly can be combined as the output of three-phase input three-phase easily, single-phase input three-phase output, the single-phase output of single-phase input, and a kind of novel converter plant by Electromagnetic Interference Test easily.

For achieving the above object, the invention provides a kind of novel converter plant, device body comprises U phase power frequency-variable module, V phase power frequency-variable module, W phase power frequency-variable module, DSP control and driver module, output switch, described DSP control and driver module respectively with described U mutually power frequency-variable module, described V phase power frequency-variable module and described W phase power frequency-variable module connect, described U phase power frequency-variable module, described V phase power frequency-variable module and described W phase power frequency-variable module are connected with described output switch respectively.

Device body also comprises external electric equipment, and described output switch is connected with described external electric equipment.

Described U phase power frequency-variable module, V phase power frequency-variable module and W phase power frequency-variable module are formed by input filtration module, rectification module, PFC boost module, inversion module, output filtration module.

Described input filtration module, described rectification module, described PFC boost module, described inversion module, described output filtration module connect successively.The U phase line of described three-phase input and center line N connect the input filtration module, the input filtration module connects rectification module, and rectification module connects the PFC boost module, and boost module connects inversion module, inversion module connects the output filtration module, and the output filtration module connects the output switch.

Acting as of described input filtration module suppresses common mode and differential mode interference.

The effect of described rectification module is that ac voltage signal is become the pulsating direct current signal.

Described PFC boost module act as the rectification of boosting of a pulsation direct current signal to be constant high-voltage signal, to make input current consistent with the phase place of voltage, thereby the raising input power.

Acting as of described inversion module is chopped into the standard sine AC signal to constant high-voltage signal.

Acting as of described output filtration module suppresses to disturb.

Described V phase power frequency-variable module and described W phase power frequency-variable module all are and the described U identical hardware module of power frequency-variable module mutually, structurally can remove according to actual needs or match.

The effect of described DSP control and driver module mainly is the drive signal that generates phase phasic difference 120 degree, so that U, V, W finally are output as the three-phase voltage of standard mutually, described in addition DSP control and driver module pass through each phase output voltage and current detecting, by the dicyclo control output voltage, transient state regulation and stable state accuracy have been improved.

Compared with prior art, the present invention has the following advantages:

The invention provides a kind of novel converter plant, this converter plant can be combined as the output of three-phase input three-phase easily, single-phase input three-phase output, the mode of the single-phase output of single-phase input, because it adopts modular project organization, power device is selected relatively easy, helps to reduce cost, and passes through Electromagnetic Interference Test easily.

Description of drawings

Fig. 1 is a structured flowchart of the present invention;

Fig. 2 is the structured flowchart of unidirectional power frequency-variable module.

The main element symbol description is as follows:

1, U phase power frequency-variable module 2, V phase power frequency-variable module

3, W phase power frequency-variable module 4, DSP control and driver module

5, output switch 6, external electric equipment

10, input filtration module 11, rectification module

12, PFC boost module 13, inversion module

14, output filtration module

Embodiment

In order more clearly to explain the present invention, the invention will be further described below in conjunction with accompanying drawing.

As shown in Figures 1 and 2, a kind of novel converter plant provided by the invention, form by U phase power frequency-variable module 1, V phase power frequency-variable module 2, W phase power frequency-variable module 3, DSP control and driver module 4, output switch 5 and external electric equipment 6, power frequency-variable module 1, V phase power frequency-variable module 2 and W phase power frequency-variable module 3 connect mutually with U respectively for DSP control and driver module 4, U phase power frequency-variable module 1, V phase power frequency-variable module 2 and W phase power frequency-variable module 3 are connected with output switch 5 respectively, and output switch 5 is connected with external electric equipment 6.Each single-phase power frequency-variable module is formed by the input filtration module 10 that connects successively, rectification module 11, PFC boost module 12, inversion module 13, output filtration module 14.

Acting as of input filtration module 10 suppresses common mode and differential mode interference, the effect of rectification module 11 is that ac voltage signal is become the pulsating direct current signal, PFC boost module 12 to act as the rectification of boosting of a pulsation direct current signal be constant high-voltage signal, make input current consistent with the phase place of voltage, thereby raising input power, acting as of inversion module 13 is chopped into the standard sine AC signal to constant high-voltage signal, and acting as of output filtration module 14 suppresses to disturb.

V phase power frequency-variable module 2 and W phase power frequency-variable module 3 all are and U power frequency-variable module 1 identical hardware module mutually, structurally can remove according to actual needs or match, the effect of DSP control and driver module 4 mainly is the drive signal that generates phase phasic difference 120 degree, so that U, V, W finally are output as the three-phase voltage of standard mutually, DSP control and driver module 4 pass through each phase output voltage and current detecting in addition, by the dicyclo control output voltage, transient state regulation and stable state accuracy have been improved.

More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.

Claims

1. novel converter plant, it is characterized in that, device body comprises U phase power frequency-variable module, V phase power frequency-variable module, W phase power frequency-variable module, DSP control and driver module, output switch, described DSP control and driver module respectively with described U mutually power frequency-variable module, described V phase power frequency-variable module and described W phase power frequency-variable module connect, described U phase power frequency-variable module, described V phase power frequency-variable module and described W phase power frequency-variable module are connected with described output switch respectively.

2. a kind of novel converter plant according to claim 1 is characterized in that device body also comprises external electric equipment, and described output switch is connected with described external electric equipment.

3. a kind of novel converter plant according to claim 1, it is characterized in that described U phase power frequency-variable module, V phase power frequency-variable module and W phase power frequency-variable module are formed by input filtration module, rectification module, PFC boost module, inversion module, output filtration module.

4. a kind of novel converter plant according to claim 3 is characterized in that, described input filtration module, described rectification module, described PFC boost module, described inversion module, described output filtration module connect successively.