CN2091041U - Light-load energy-saving star-delta automatic conversion starter - Google Patents
Light-load energy-saving star-delta automatic conversion starter Download PDFInfo
- Publication number
- CN2091041U CN2091041U CN 91203449 CN91203449U CN2091041U CN 2091041 U CN2091041 U CN 2091041U CN 91203449 CN91203449 CN 91203449 CN 91203449 U CN91203449 U CN 91203449U CN 2091041 U CN2091041 U CN 2091041U
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- CN
- China
- Prior art keywords
- star
- starter
- light
- load energy
- delta
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- 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.)
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- 239000007858 starting material Substances 0.000 title claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 title description 7
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 230000007935 neutral effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 1
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Abstract
A light-load energy-saving star-delta automatic switching starter capable of automatically switching the star-delta running mode of a motor along with the change of load is characterized in that a current detection control circuit, a voltage relay and a working state selection switch are added in an existing star-delta starter formed by electrically connecting a cabinet type shell, an alternating current contactor, a thermal relay and a control button, the star-delta starter can be automatically switched from angular connection to star connection when the motor is in light load or no load, the power consumption is saved, the switching and running modes can be selected according to the requirements of different types of loads and working states, and the protection performance of the motor is improved by utilizing the electrical characteristics of star connection of the motor.
Description
The utility model relates to a kind of starter of threephase asynchronous, especially has the star-delta starter of light-load energy saving function.
Present known star-delta starter is by case or cabinet-shaped casing, contactor, and the time relay, fuse, button, signal lamp, ammeter, electrical ties such as instrument transformer constitute.Because three phase electric machine is when underloading; the power savings that delta connection is changed into star-star connection is remarkable; therefore the scheme of the star triangle energy-saving starter of developing is a lot; but it is too much that ubiquitous problem is an element; complex circuit; different types of load and operating characteristic are not required to be distinguished, so bad adaptability, aspects such as electric motor protecting operation are being lacked comprehensive coordination.
To provide a kind of no part few order of the present utility model, and circuit is simple, and adaptability is strong, can adjust control mode according to loadtype and job requirement, and starter is changed at the light-load energy saving star angle that the electric motor protecting performance is more complete automatically.
Be achieved in that order of the present utility model in case or cabinet-shaped casing, except that the whole elements that adopt star-delta starter, increase current detection control circuit, current detection control circuit is by current transformer, ammeter, bridge rectifier, resistance, electric capacity, current relay are formed.The effect of current detection control circuit is that by the double-throw switch effect, respectively to the power supply of star corner connection tentaculum, thereby the control motor is in star or the operation of horn shape attitude when being greater than or less than the setting current value.Under middle-size and small-size or situation that instructions for use is not high, can finish the effect of current detection control circuit with a current relay.This circuit seal in two control lines not third phase; phase shortage took place in mutually when the angle was moved like this; the testing circuit electric current reduces or disappears, and circuit changes star over to and connects, and star connects the back because phase shortage; asterism voltage raises; string disconnects the normally-closed contact of string at control circuit in asterism and zero 's voltage relay action, makes motor obtain quick open phase protection; two phases failure are protected by control circuit in addition, have therefore improved the protective value to motor.A hand switch is parallel to the normally opened contact of powering to the time relay, when closing, the time relay is switched on, and it controls contact disconnection, and conversion is not controlled by the time relay, conversion is controlled by the starting time to the angle by star during disconnection, therefore realizes conversion quick-action and time control selection.The another hand switch is series in the self-insurance line of corner connection tentaculum, and the hour angle contactor energy self-insurance of closing realizes angle running locking, disconnects the hour angle contactor and loses self-insurance, and circuit can be changed with load variations.By the selection of these two switches, dissimilar loads and operating characteristic requirement have been satisfied.Two hand switches can be operated arbitrarily, no matter in what position, do not influence star triangle starting process.
Because adopt such scheme, adaptability is strong, power savings is good, and circuit is simple, misoperation fault can not take place, and is flexible and convenient to use, and the protective value to motor increases significantly simultaneously.
Below in conjunction with drawings and Examples the utility model is further specified.Graphic symbol in the Figure of description adopts new national standard 4728.
Among the figure: ABC three phase mains FU
1FU
2Protector SB
2Stop button SB
1Start button QS
1Time control quick-action selector switch QS
2Angle lock conversion selecting switch FV voltage relay FA current relay N zero line FR thermal relay KT time relay TA current transformer A ammeter R resistance C electric capacity KM main contactor KM
YStar contactor KM
△Corner connection tentaculum M motor
Listed element in the Figure of description should adopt novel product, because of the superseded cycle of electric component shorter and shorter, the performance of new product has to exceed gives the raising of seeing, as through using the WHCJ of 40 peaces under the checking equal conditions
10A.C. contactor is than the QC of 150 peaces
12Type contactor not bad (see the electric world 91 years 2 phase 19 pages).Component specification can install the time relay additional in the circuit, or this circuit is used for repeat circuit according to institute's control rating of electric machine series apolegamy, finishes more powerful control.
In the Figure of description illustrated embodiment, the current detection control circuit string is in the C phase, the double-throw single-pole switch of current relay FA, and the moved end is connected to main contactor and often opens auxiliary magnet KM
2The control power end that is provided, a quiet star contactor KM that is terminated at
YInterlocking normally-closed contact KM
△Front end, another quiet corner connection tentaculum KM that is terminated at
△Interlocking closed contact KM
Y2Front end is in order to realize the angle conversion of control star.Hand switch QS
1Be parallel to star contactor normally opened contact KM to time relay power supply
Y1, select to realize time control and quick-action.Another hand switch QS
2Be series at corner connection tentaculum self-sustaining normally opened contact KM
△, this switch closes and realizes angle running locking, opens the hour angle contactor and can not self-insurance realize conversion.Voltage relay FV is serially connected in star contactor KM
YElectrically connect between asterism and zero N, fault clock star point voltages such as the phase failure, the line that continues, short circuit take place when star connects to raise, the action of relay overvoltage disconnects string at main contactor KM self-insurance normally opened contact KM
1Interior normally-closed contact FV makes the control circuit loss protecting.It is identical with common star-delta starter that the circuit of case or cabinet-shaped casing and all the other elements connects assembling.
Claims (4)
1, starter is changed at a kind of light-load energy saving star angle automatically, in case or cabinet-shaped casing, contactor, the time relay, thermal relay, button electrically connects, and it is characterized in that: the interlocking contact of the double-throw switch of current detection control circuit and star and corner connection tentaculum electrically connects, voltage relay, two hand switches electrically connect with relevant control circuit.
2, starter is changed at light-load energy saving star according to claim 1 angle automatically, and it is characterized in that: the double-throw switch moved end is connected the control power end that the main contactor normally opened contact provides, and two quiet ends are attached at the interlocking normally-closed contact front end of star and corner connection tentaculum respectively.
3, starter is changed at light-load energy saving star according to claim 1 angle automatically, it is characterized in that: two hand switches, to connect with corner connection tentaculum self holding contact for one, and another is with in parallel to the normally opened contact of time relay power supply.
4, starter is changed at light-load energy saving star according to claim 1 angle automatically, and it is characterized in that: voltage relay one is terminated at the electrical connection asterism of star contactor, other end connecting to neutral, and its long closed contact is connected with main contactor self-sustaining normally opened contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91203449 CN2091041U (en) | 1991-03-06 | 1991-03-06 | Light-load energy-saving star-delta automatic conversion starter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91203449 CN2091041U (en) | 1991-03-06 | 1991-03-06 | Light-load energy-saving star-delta automatic conversion starter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2091041U true CN2091041U (en) | 1991-12-18 |
Family
ID=4913764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91203449 Withdrawn CN2091041U (en) | 1991-03-06 | 1991-03-06 | Light-load energy-saving star-delta automatic conversion starter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2091041U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860287A (en) * | 2010-06-29 | 2010-10-13 | 河南省电力公司许昌供电公司 | Economical and practical Y-delta starting device |
| CN102035443A (en) * | 2010-12-07 | 2011-04-27 | 河南省电力公司许昌供电公司 | Y-delta step-down starting control box for energy-saving asynchronous motor |
| CN102281030A (en) * | 2011-07-23 | 2011-12-14 | 岳群生 | Triangle-star (Y) starting method of low power, asynchronous starting and permanent-magnet synchronous motor |
| CN105262376A (en) * | 2015-10-20 | 2016-01-20 | 珠海格力电器股份有限公司 | Star-delta starting circuit for three-phase motor and starting method thereof |
-
1991
- 1991-03-06 CN CN 91203449 patent/CN2091041U/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860287A (en) * | 2010-06-29 | 2010-10-13 | 河南省电力公司许昌供电公司 | Economical and practical Y-delta starting device |
| CN102035443A (en) * | 2010-12-07 | 2011-04-27 | 河南省电力公司许昌供电公司 | Y-delta step-down starting control box for energy-saving asynchronous motor |
| CN102035443B (en) * | 2010-12-07 | 2012-09-05 | 河南省电力公司许昌供电公司 | Y-delta step-down starting control box for energy-saving asynchronous motor |
| CN102281030A (en) * | 2011-07-23 | 2011-12-14 | 岳群生 | Triangle-star (Y) starting method of low power, asynchronous starting and permanent-magnet synchronous motor |
| CN105262376A (en) * | 2015-10-20 | 2016-01-20 | 珠海格力电器股份有限公司 | Star-delta starting circuit for three-phase motor and starting method thereof |
| CN105262376B (en) * | 2015-10-20 | 2018-04-13 | 珠海格力电器股份有限公司 | Star-delta starting circuit for three-phase motor and starting method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Liu Zhenshun Document name: Notice of termination |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |