CN206807326U - A kind of star triangle frequency changer circuit - Google Patents
A kind of star triangle frequency changer circuit Download PDFInfo
- Publication number
- CN206807326U CN206807326U CN201720361241.8U CN201720361241U CN206807326U CN 206807326 U CN206807326 U CN 206807326U CN 201720361241 U CN201720361241 U CN 201720361241U CN 206807326 U CN206807326 U CN 206807326U
- Authority
- CN
- China
- Prior art keywords
- circuit
- star
- inverter
- frequency changer
- filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model provides a kind of star triangle frequency changer circuit, including star delta circuit, filter circuit, inverter circuit, filter output circuit, A/D sample circuits, drive circuit, keyboard unit, main control unit and display unit, star delta circuit connects filter circuit, filter circuit connects inverter circuit, inverter circuit connection filtering output circuit, filter output circuit connection A/D sample circuits, inverter circuit connects drive circuit, drive circuit, keyboard unit, A/D sample circuits and display unit connect main control unit respectively, the utility model is designed reasonably, it is easy to use, circuit is practical, reduce energy loss by the circuit of frequency conversion, the energy is saved, there is good application prospect.
Description
Technical field
The utility model is specifically related to a kind of star triangle frequency changer circuit.
Background technology
For the stator winding of normal operation is the squirrel-cage asynchronous motor of delta connection, if when starting
Stator winding is connected into star, waits to be connected into triangle again after starting, it is possible to reduces starting current, mitigates it to power network
Impact.Such start mode is referred to as star triangle decompression starting, or referred to as star delta control.During using star delta control, rise
Streaming current is 1/3 when pressing delta connection across-the-line starting originally.In star delta control, 2-2.3 times of starting current.
When using star delta control in other words, starting torque is also reduced to originally by 1/3 during delta connection across-the-line starting.It is applied to
The occasion of no-load or light start.And compared with any other reduced-voltage starter, its structure is most simple, price is also most just
Preferably.
Utility model content
The purpose of this utility model is to solve above-mentioned deficiency, there is provided a kind of star triangle frequency changer circuit.
The purpose of this utility model is achieved through the following technical solutions：
A kind of star triangle frequency changer circuit, including star delta circuit, filter circuit, inverter circuit, filtering output circuit, A/D
Sample circuit, drive circuit, keyboard unit, main control unit and display unit, star delta circuit connection filter circuit, filter circuit
Inverter circuit, inverter circuit connection filtering output circuit are connected, filtering output circuit connects A/D sample circuits, and inverter circuit connects
Drive circuit is connect, drive circuit, keyboard unit, A/D sample circuits and display unit connect main control unit respectively.
Main control unit uses TMS320F2812 DPS chips.
Inverter circuit is IGBT bridge inverter main circuits.
Star delta circuit inputs including three-phase current.
The utility model has following beneficial effect：
The utility model is designed reasonably, easy to use, circuit is practical, and the circuit by frequency conversion reduces energy loss, saves
The about energy, there is a good application prospect.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present utility model；
Fig. 2 is star delta circuit figure of the present utility model.
Embodiment
The utility model is further described below in conjunction with the accompanying drawings：
As depicted in figs. 1 and 2, a kind of star triangle frequency changer circuit, including star delta circuit 1, filter circuit 2, inverter circuit
3rd, output circuit 4, A/D sample circuits 5, drive circuit 6, keyboard unit 7, main control unit 8 and display unit 9, star triangle are filtered
Circuit 1 connects filter circuit 2, and filter circuit 2 connects inverter circuit 3, the connection filtering output circuit 4 of inverter circuit 3, filtering output
Circuit 4 connects A/D sample circuits 5, and inverter circuit 3 connects drive circuit 6, drive circuit 6, keyboard unit 7, A/D sample circuits 5
Main control unit 8 is connected respectively with display unit 9.
Main control unit uses TMS320F2812 DPS chips.
Inverter circuit is IGBT bridge inverter main circuits.
Star delta circuit inputs including three-phase current.
Star delta circuit principle：After power turn-on switch QS, start button SB2, contactor KM1, the time relay are pressed
KT, contactor KM3 coil electricity adhesives.KM1 closes self-locking, contactor KM1, KM3 in No. 3 lines to the normally open contact between No. 4 lines
Main contact motor M windings are connected into star decompression starting.Meanwhile contactor KM3 No. 4 lines between No. 5 lines it is normally closed touch
Head disconnects, and cuts off contactor KM2 wire loop power supplys so that in contactor KM3 adhesives, contactor KM2 is unable to adhesive.By
When motor speed is increased to certain value after certain time, motor current declines, and time relay KT delays, which reach, adjusts
Value, it is closed in No. 5 lines to timing closing normally open contact between No. 6 lines, disconnects normally closed touch in No. 7 lines to delay between No. 8 lines
Head disconnects, cut off the power supply of contactor KM3 wire loops, the release of contactor KM3 dead electricity, while KM3 No. 4 lines to No. 5 lines it
Between normally closed interlock reset closure, connect contactor KM2 wire loop power supplys, contactor KM2 coil electricity adhesive self-lockings, its lead
Motor M windings are connected into the operation of triangle junction full voltage by contact with contactor KMl main contacts.
Described above, embodiment is only that the preferred embodiment of the present invention is described, not to the present invention's
Scope is defined, on the premise of the spirit of the technology of the present invention is not departed from, skill of this area engineers and technicians to the present invention
The various modifications and improvement that art scheme is made, it all should fall into the protection domain of claims of the present invention determination.
Claims (4)
1. a kind of star triangle frequency changer circuit, including star delta circuit, filter circuit, inverter circuit, filtering output circuit, A/D are adopted
Sample circuit, drive circuit, keyboard unit, main control unit and display unit, it is characterised in that：Star delta circuit connects filtered electrical
Road, filter circuit connection inverter circuit, inverter circuit connection filtering output circuit, filtering output circuit connection A/D sample circuits,
Inverter circuit connects drive circuit, and drive circuit, keyboard unit, A/D sample circuits and display unit connect main control unit respectively.
A kind of 2. star triangle frequency changer circuit according to claim 1, it is characterised in that：Described main control unit uses
TMS320F2812 DPS chips.
A kind of 3. star triangle frequency changer circuit according to claim 1, it is characterised in that：Described inverter circuit is IGBT bridges
Formula inverter circuit.
A kind of 4. star triangle frequency changer circuit according to claim 1, it is characterised in that：Described star delta circuit includes three
Phase current inputs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720361241.8U CN206807326U (en) | 2017-04-08 | 2017-04-08 | A kind of star triangle frequency changer circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720361241.8U CN206807326U (en) | 2017-04-08 | 2017-04-08 | A kind of star triangle frequency changer circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206807326U true CN206807326U (en) | 2017-12-26 |
Family
ID=60732281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720361241.8U Expired - Fee Related CN206807326U (en) | 2017-04-08 | 2017-04-08 | A kind of star triangle frequency changer circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206807326U (en) |
-
2017
- 2017-04-08 CN CN201720361241.8U patent/CN206807326U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171226 |