CN209217930U

CN209217930U - A kind of frequency converter having circuit protection function

Info

Publication number: CN209217930U
Application number: CN201822008173.4U
Authority: CN
Inventors: 曾冬梅
Original assignee: Shishi Ruili Machinery Technology Co Ltd
Current assignee: Shishi Ruili Machinery Technology Co Ltd
Priority date: 2018-12-03
Filing date: 2018-12-03
Publication date: 2019-08-06
Anticipated expiration: 2028-12-03

Abstract

The utility model belongs to converter technology field; more particularly to a kind of frequency converter for having circuit protection function; including frequency converter, fixed frame and protector; the side of the frequency converter is fixedly connected by fixed frame with the outside of protector; and the bottom of frequency converter side is fixedly connected with No.1 power supply line; one end of the No.1 power supply line is fixedly connected with No.1 binding post, and the No.1 binding post is fixedly mounted on the middle part of protector bottom end, and the outside of the protector offers through-hole.This has the frequency converter of circuit protection function; pass through setting through-hole, piston, movable spring, conductive plate and conducting block; it can use the principle that air expands with heat and contract with cold; so that piston is moved in the inside of protector; consequently facilitating carrying out power on/off to frequency converter; the problem of tradition controls power on/off using the deformation of bimetal leaf and is easy to appear poor contact is avoided, improves the sensitivity of the protector, it is ensured that the work that frequency converter can be stable.

Description

A kind of frequency converter having circuit protection function

Technical field

The utility model belongs to converter technology field, and in particular to a kind of frequency converter for having circuit protection function.

Background technique

Frequency converter is to be handed over using converter technique and microelectric technique by changing motor frequency mode of working power supply to control The electric control appliance of galvanic electricity motivation, supply voltage required for frequency converter can provide it according to the actual needs of motor, And then achieving the purpose that energy conservation and speed regulation, and with the continuous improvement of industrial automatization, frequency converter has also obtained very wide General application.

According to application No. is a kind of protective devices of high-voltage frequency converter of CN201820016714.5 it is found that the technical solution Although controlling the folding of breaker in the case where manual and abnormal automatic divide-shut brake, so that high-tension motor powers on or goes electricity, Ensure that high-tension motor can safe and effective operation, while also ensuring the safety of high-voltage frequency converter, reduce economic damage It loses, improves production efficiency；But most of breaker in the technical solution is controlled using being thermally deformed for bimetal leaf Circuit processed it is open or closed, and after long-term use, the case where breaker is easy to appear poor contact, so that its sensitivity Difference, or even normal power on/off can not be carried out, so that the operating to frequency converter brings inconvenience.

Utility model content

The purpose of this utility model is to provide a kind of frequency converters for having circuit protection function, to solve above-mentioned background skill The problem of being proposed in art.

To achieve the above object, the utility model provides the following technical solutions: a kind of frequency conversion having circuit protection function Device, including frequency converter, fixed frame and protector, the external fixed company that the side of the frequency converter passes through fixed frame and protector It connects, and the bottom of frequency converter side is fixedly connected with No.1 power supply line, one end of the No.1 power supply line is fixedly connected with No.1 Binding post, the No.1 binding post are fixedly mounted on the middle part of protector bottom end, and the outside of the protector offers through-hole, and Protector internal activity is socketed with piston, and the bottom of the piston is connected by movable spring and the bottom driving of protector inner cavity It connects, and is fixedly installed with No. two binding posts in the middle part of piston bottom end, the bottom of No. two binding posts passes through connecting line and No.1 The top of binding post is electrically connected, and is fixedly connected with conductive plate at the top of the piston, the top movable of the conductive plate is connected with Conducting block, the conducting block are fixedly mounted on the top of protector inner cavity, and No. three are fixedly installed at the top of the protector and is connect The bottom end of terminal, No. three binding posts is located at the inside of conducting block, and the inside fixing sleeve of No. three binding posts is connected to No. two electricity The input terminal of source line, No. two power supply lines is electrically connected with the output end of city's circuit.

Preferably, the fixed frame is welded by link block and fixing sleeve, the inner wall of fixing sleeve and the outside of protector It is fixedly attached.

Preferably, the inside of the piston is filled with molten metal, and the side of piston and the inner wall of protector closely connect Touching, forms closed air chamber between the piston and protector and conducting block.

Preferably, the movable spring is located at the inside of protector, and the both ends of movable spring respectively with protector inner cavity Bottom be fixedly connected with the bottom of piston.

Preferably, the bottom of the conductive plate is in contact with the molten metal of internal piston, and conductive plate is notheated hair Raw Bending Deformation.

Preferably, the bottom end of No. three binding posts runs through protector and extends to the inside of conducting block, and No. three wiring Column is equal in magnitude with No.1 binding post, and No. three binding posts are with No.1 binding post using the middle part of protector as symmetrical centre phase It is mutually symmetrical.

Compared with prior art, the utility model has the beneficial effects that

1, frequency converter for having circuit protection function, by the way that protector, No.1 power supply line, No.1 binding post, three is arranged Number binding post and No. two power supply lines, can play the role of circuit protection to frequency converter, keep away during frequency converter use Exempted from frequency converter because electric current is excessive be damaged the problem of, improve the service life of frequency converter, it is ensured that motor can be just Normal operating.

2, the frequency converter for having circuit protection function passes through setting through-hole, piston, movable spring, conductive plate and conduction Block can use the principle that air expands with heat and contract with cold, so that piston is moved in the inside of protector, consequently facilitating to frequency converter Power on/off is carried out, the problem of tradition controls power on/off using the deformation of bimetal leaf and is easy to appear poor contact is avoided, Improve the sensitivity of the protector, it is ensured that the work that frequency converter can be stable.

Detailed description of the invention

Fig. 1 is the front schematic view of the utility model structure；

Fig. 2 is the cross-sectional view of the utility model structural defence device；

Fig. 3 is the bottom view of the utility model structural defence device.

In figure: 1, frequency converter；2, fixed frame；3, protector；4, No.1 power supply line；5, No.1 binding post；6, through-hole；7, living Plug；8, movable spring；9, No. two binding posts；10, connecting line；11, conductive plate；12, conducting block；13, No. three binding posts；14, two Number power supply line.

Specific embodiment

The utility model is further described below with reference to embodiment.

The following examples illustrate the utility model, but cannot be used to limit the protection scope of the utility model.Implement Condition in example can be adjusted according to actual conditions are further, to the utility model under the concept thereof of the utility model Method simple modifications belong to the requires of the utility model protection range.

Fig. 1-3 is please referred to, the utility model provides a kind of technical solution: a kind of frequency converter having circuit protection function, Including frequency converter 1, fixed frame 2 and protector 3, this frequency converter 1 is suitable for the SIEMENS S7-200 of model MM440, frequency converter 1 Side be fixedly connected by fixed frame 2 with the outside of protector 3, and the bottom of 1 side of frequency converter be fixedly connected with No.1 electricity Source line 4, one end of No.1 power supply line 4 are fixedly connected with No.1 binding post 5, and No.1 binding post 5 is fixedly mounted on 3 bottom end of protector Middle part, the outside of protector 3 offers through-hole 6, and 3 internal activity of protector is socketed with piston 7, and the bottom of piston 7 passes through Movable spring 8 is connect with the bottom driving of 3 inner cavity of protector, and No. two binding posts 9 are fixedly installed in the middle part of 7 bottom end of piston, The bottom of No. two binding posts 9 is electrically connected by connecting line 10 with the top of No.1 binding post 5, and the top of piston 7 is fixedly connected with Conductive plate 11, the top movable of conductive plate 11 are connected with conducting block 12, and conducting block 12 is fixedly mounted on the top of 3 inner cavity of protector Portion, the top of protector 3 are fixedly installed with No. three binding posts 13, and the bottom end of No. three binding posts 13 is located at the inside of conducting block 12, And the inside fixing sleeve of No. three binding posts 13 is connected to No. two power supply lines 14, the output of the input terminal and city's circuit of No. two power supply lines 14 End electrical connection.

Wherein, fixed frame 2 is welded by link block and fixing sleeve, and the inner wall of fixing sleeve and the external of protector 3 are fixed Socket, can play fixed effect to protector 3 during 3 use of protector, so as to convenient for protector 3 are installed.

Wherein, the inside of piston 7 is filled with molten metal, and the inner wall of the side of piston 7 and protector 3 is in close contact, Closed air chamber is formd between piston 7 and protector 3 and conducting block 12, it can be during electric current be excessive, so that living It is moved under the pressure effect of the hot-air in air chamber of plug 7, consequently facilitating being powered off to frequency converter 1, and to frequency converter 1 Play the role of protection.

Wherein, movable spring 8 is located at the inside of protector 3, and the both ends of movable spring 8 respectively with 3 inner cavity of protector Bottom is fixedly connected with the bottom of piston 7, piston 7 can be made to move under the elastic force effect of movable spring 8, and make conduction It is in close contact between plate 11 and conducting block 12, to connect circuit, frequency converter 1 is operated normally.

Wherein, the bottom of conductive plate 11 is in contact with the molten metal inside piston 7, and conductive plate 11 is notheated generation Bending Deformation enables and comes into full contact between conductive plate 11 and conducting block 12, it is ensured that between conductive plate 11 and conducting block 12 The stability of contact area improves the patency of circuit.

Wherein, the bottom end of No. three binding posts 13 runs through protector 3 and extends to the inside of conducting block 12, and No. three binding posts 13 is equal in magnitude with No.1 binding post 5, and No. three binding posts 13 and No.1 binding post 5 are using the middle part of protector 3 as symmetrical centre Symmetrically.

The working principle and process for using of the utility model: protector 3 is mounted on by frequency converter 1 by fixed frame 2 first Side, then by No.1 power supply line 4 between frequency converter 1 and protector 3 circuit connect, while pass through No. two power supply lines 14 Circuit between protector 3 and city's circuit is connected, it is molten inside piston 7 when then the electric current when frequency converter 1 works is excessive Body metal can generate a large amount of heat, so that the pressure of 3 inner air chamber of protector increases, piston 7 can be in pressure at this time It moves under the action of difference, so that mutually being separated between conductive plate 11 and conducting block 12, and then circuit is powered off, it can be right Frequency converter 1 plays the role of protection, improves the service life of frequency converter 1, finally when electric current is stablized, inside piston 7 The no longer a large amount of heat production of molten metal, piston 7 can set back under the elastic force effect of movable spring 8 at this time, so that conductive plate 11 It is in contact between conducting block 12, to connect circuit, improves the sensitivity of the protector 3, it is ensured that frequency converter 1 can be steady Fixed work.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims

1. a kind of frequency converter for having circuit protection function, it is characterised in that: including frequency converter (1), fixed frame (2) and protector (3), the side of the frequency converter (1) is fixedly connected by fixed frame (2) with the outside of protector (3), and frequency converter (1) side Bottom be fixedly connected with No.1 power supply line (4), one end of the No.1 power supply line (4) is fixedly connected with No.1 binding post (5), The No.1 binding post (5) is fixedly mounted on the middle part of protector (3) bottom end, and the outside of the protector (3) offers through-hole (6), and protector (3) internal activity is socketed with piston (7), and the bottom of the piston (7) passes through movable spring (8) and protector (3) the bottom driving connection of inner cavity, and No. two binding posts (9) are fixedly installed in the middle part of piston (7) bottom end, No. two wiring The bottom of column (9) is electrically connected by connecting line (10) with the top of No.1 binding post (5), and the top of the piston (7) is fixed to be connected It is connected to conductive plate (11), the top movable of the conductive plate (11) is connected with conducting block (12), the fixed peace of the conducting block (12) Mounted in the top of protector (3) inner cavity, it is fixedly installed with No. three binding posts (13) at the top of the protector (3), described No. three The bottom end of binding post (13) is located at the inside of conducting block (12), and the inside fixing sleeve of No. three binding posts (13) is connected to No. two power supplys One end of line (14), No. two power supply lines (14) is electrically connected with city's circuit.

2. a kind of frequency converter for having circuit protection function according to claim 1, it is characterised in that: the fixed frame (2) it is welded by link block and fixing sleeve, the outside of the inner wall and protector (3) of fixing sleeve is fixedly attached.

3. a kind of frequency converter for having circuit protection function according to claim 1, it is characterised in that: the piston (7) Inside be filled with molten metal, and the inner wall of the side of piston (7) and protector (3) is in close contact, and the piston (7) and is protected Closed air chamber is formd between shield device (3) and conducting block (12).

4. a kind of frequency converter for having circuit protection function according to claim 1, it is characterised in that: the movable spring (8) be located at protector (3) inside, and the both ends of movable spring (8) respectively with the bottom of protector (3) inner cavity and piston (7) Bottom be fixedly connected.

5. a kind of frequency converter for having circuit protection function according to claim 1, it is characterised in that: the conductive plate (11) the bottom molten metal internal with piston (7) is in contact, and conductive plate (11) is notheated the deformation that bends.

6. a kind of frequency converter for having circuit protection function according to claim 1, it is characterised in that: No. three wiring The bottom end of column (13) runs through protector (3) and extends to the inside of conducting block (12), and No. three binding posts (13) and No.1 wiring Column (5) it is equal in magnitude, No. three binding posts (13) and No.1 binding post (5) are using the middle part of protector (3) as symmetrical centre Symmetrically.