CN201435684Y

CN201435684Y - Low-voltage frequency converter

Info

Publication number: CN201435684Y
Application number: CN2009201359872U
Authority: CN
Inventors: 何勇波
Original assignee: Shenzhen Ambition Electronics Co Ltd
Current assignee: Shenzhen Ambition Electronics Co Ltd
Priority date: 2009-03-31
Filing date: 2009-03-31
Publication date: 2010-03-31
Anticipated expiration: 2019-03-31

Abstract

The utility model discloses a low-voltage frequency converter, which comprises a power board and a main control board. A main circuit is equipped with a rectifier bridge and an inverter module, wherein a capacitor fixing frame is arranged between the rectifier bridge and the inverter module, a plurality of inverted capacitors are fixed on the capacitor fixing frame, and the rectifier bridge is connected with the inverter module through the inverted capacitors. Compared with the prior art, the filter capacitors are reversely mounted and fixed through the capacitor fixing frame to enable the connection distance from capacitor wiring pins to the rectifier bridge and the inverter module to be shortest, thereby reducing connection wires. The main control board, the power board and a driving board which are shielded and isolated from the main circuit are not interfered by current of the main circuit, thereby achieving fine filter anti-interference effect and enabling work of the frequency converter to be more stable.

Description

A kind of low voltage frequency converter

Technical field:

The utility model relates to frequency converter, and particularly a kind of have a good low voltage frequency converter of anti-interference.

Background technology:

Frequency converter is the AC power that power frequency supply (50Hz or 60Hz) is transformed into various frequencies, equipment with the variable-speed operation of realizing motor, wherein control circuit is finished the control to main circuit, rectification circuit is transformed into direct current with alternating current, direct-flow intermediate circuit carries out smothing filtering to the output of rectification circuit, and inverter circuit becomes alternating current with direct current another mistake.

The general easy electromagnetic interference that is subjected to the external world of present frequency converter, this mainly is to arrange unreasonable because of internal capacitance, rectifier bridge, inversion module (IGBT), master control borad, power panel, drive plate, connection line between anti-interference capacitor and rectifier bridge and the inversion module (IGBT) is long, interlaced, so just cause frequency converter filtering interference free performance poor, job insecurity.

Summary of the invention:

Poor for solving existing low voltage frequency converter interference free performance, the problem of job insecurity, the purpose of this utility model are to provide a kind of good low voltage frequency converter of anti-interference that has.

For achieving the above object, the utility model is mainly by the following technical solutions:

A kind of low voltage frequency converter, comprise power panel and master control borad, described main circuit is provided with rectifier bridge and inversion module, wherein be provided with the capacitor fixing frame between rectifier bridge and the inversion module, be fixed with a plurality of inversion electric capacity on the described capacitor fixing frame, rectifier bridge then is inverted electric capacity and inversion module short distance by this, does not have staggered connection.

Also include power input on the described power panel, this power input is connected with rectifier bridge.

Also include Hall element on the described main circuit, inversion module is connected with power output end by this Hall element.

Described inversion module is provided with a drive plate.

The utility model is inverted filter capacitor and is installed, and fixes by the capacitor fixing frame, and it is the shortest to make electric capacity wiring pin and rectifier bridge be connected distance with inversion module, thereby has reduced connecting line, reaches the good anti-interference effect of filtering, makes the frequency converter more stable work.

Description of drawings:

Fig. 1 is the utility model structural representation.

Identifier declaration among the figure: power input 1, rectifier bridge 2, electric capacity 3, capacitor fixing frame 4, inversion module 5, Hall element 6, master control borad 7, power panel 8, drive plate 9, power output end 10.

Embodiment:

Core concept of the present utility model is: be installed on the capacitor fixing frame by electric capacity is inverted, the distance that is connected between electric capacity and rectifier bridge and the inversion module is reduced greatly, thereby reduced the distance of current delivery, and then avoided current delivery and the electromagnetic interference that causes, in addition, can also play the effect of filtering by electric capacity, to carry out filtering through the electric current behind the rectifier AC-DC outputs to inversion module direct current is become interchange, detect output current by Hall element then, and export by power output end.

For setting forth thought of the present utility model and purpose, the utility model is described further below in conjunction with the drawings and specific embodiments.

See also shown in Figure 1, the utility model provides a kind of good low voltage frequency converter of anti-interference that has, it mainly includes master control borad 7, power panel 8 and drive plate 9, wherein main circuit is provided with rectifier bridge 2, electric capacity 3, inversion module 5 and power input 1 and power output end 10, here rectifier bridge 2 is mainly used in and converts the alternating current from power input 1 input to direct current, after by filter capacitor 3 filtering, be input to inversion module 5 then, by inversion module 5 it is changed, the output AC electricity, and detect the back by Hall element 6 and export by power output end 10.

Wherein be provided with a capacitor fixing frame 4 between rectifier bridge 2 and inversion module 5, this capacitor fixing frame 4 is mainly used in fixed installation filter capacitor 3, and master control borad 7, power panel 8, drive plate 9 and main circuit shielding separate, and are not subjected to the interference of main circuit current.

Described filter capacitor 3 adopts and is inverted the main effect of installing is that rectifier bridge 2 and inversion module 5 and the connection line between it are oversimplified, and it is more short to connect distance, like this owing to shortened the distance of current delivery, so just make the interference that is produced in the transmission course then greatly reduce, thereby the electric current that outputs to inversion module 5 is met the requirements more, and the electric current that is input to inversion module 5 then directly passes through power output end 10 after these alternating currents detect by Hall element 6 and exports again through output AC electricity after the inversion processing.

And above-mentioned inversion module 5 realizes that by drive plate 9 drive plate 9 is then controlled by master control borad 7 at the inversion process need to electric current.

The utility model is inverted the mode of installing by adopting with filter capacitor, has realized the optimization of whole frequency converter internal structure, makes low voltage frequency converter have good anti-interference, and then makes frequency converter have better energy conservation and consumption reduction effects.

More than a kind of low voltage frequency converter provided by the utility model is described in detail, used specific case herein principle of the present utility model and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.

Claims

1, a kind of low voltage frequency converter, comprise power panel (8), master control borad (7) and main circuit, it is characterized in that: described main circuit is provided with rectifier bridge (2) and inversion module (5), wherein be provided with capacitor fixing frame (4) between rectifier bridge (2) and the inversion module (5), be fixed with a plurality of inversion electric capacity (3) on the described capacitor fixing frame (4), rectifier bridge (2) then is inverted electric capacity (3) by this and is connected with inversion module (5).

2, low voltage frequency converter according to claim 1 is characterized in that also including on the described main circuit power input (1), and this power input (1) is connected with rectifier bridge (2).

3, low voltage frequency converter according to claim 1 is characterized in that also including on the described main circuit Hall element (6), and described inversion module (5) is connected with power output end (10) by this Hall element (6).

4, low voltage frequency converter according to claim 1 is characterized in that described inversion module (5) is provided with a drive plate (9).