CN205792315U - A kind of star triangle start circuit of threephase motor - Google Patents
A kind of star triangle start circuit of threephase motor Download PDFInfo
- Publication number
- CN205792315U CN205792315U CN201620489343.3U CN201620489343U CN205792315U CN 205792315 U CN205792315 U CN 205792315U CN 201620489343 U CN201620489343 U CN 201620489343U CN 205792315 U CN205792315 U CN 205792315U
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- China
- Prior art keywords
- star
- tentaculum
- catalyst
- normally opened
- opened contact
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Abstract
A kind of star triangle start circuit of threephase motor, including PLC, main contactor, connection delta tentaculum, star-like catalyst and the time relay, the head end of controlled motor stator winding connects power supply by the normally opened contact of main contactor, the tail end normally opened contact short circuit by star-like catalyst the normally opened contact by connection delta tentaculum are connected with power supply, the control coil of described main contactor meets PLC, the control coil of described star-like catalyst meets PLC by the normally-closed contact of connection delta tentaculum, the control coil of described connection delta tentaculum meets PLC through the time delay normally opened contact of the time relay and the normally-closed contact of star-like catalyst successively, the control coil of the time relay is connected between the normally-closed contact of star-like catalyst and the time delay normally opened contact of the time relay.This utility model is additionally arranged the time relay in motor star triangle start circuit, makes connection delta tentaculum time delay adhesive, thus prevents the generation of short trouble in star triangle transformation process, it is ensured that the normal startup of motor.
Description
Technical field
This utility model relates to the star triangle start circuit of a kind of threephase motor, can effectively prevent star triangle from becoming
Instantaneous short circuit phenomenon occurs during changing, belongs to technical field of motors.
Background technology
Star triangle start refers to use star-connection mode at the electric motor starting initial stage, after electric motor starting success again
By double-throw switch, motor switched to rapidly the triangular form mode of connection.Star triangle start belongs to reduced-voltage starting, can
Effectively reduce starting current and start power.During for starting, load is light, the motor of load weight when running, and one
As can use star triangle start mode；The starting current of squirrel-cage motor is 5-7 times of running current, in order to
Prevent electric motor starting Current on Grid from forming excessive impact, generally also can be to use star triangle start mode.
The motor of many equipment is all controlled by PLC and catalyst, Fig. 1 and Fig. 2 is conventional respectively
The major loop of star triangle start circuit and the electrical schematic diagram in control loop, when needing to start motor M, PLC is first
First control main contactor J0 and star-like catalyst J2 adhesive, make motor operate under star-connection mode, electricity
After machine reaches certain rotating speed, PLC, while making star-like catalyst J2 power-off, makes connection delta tentaculum J1
Obtain electric, motor is switched to the triangular form mode of connection.Due to pickup time of catalyst and release time not
Identical, in transformation process, likely there is the phenomenon of adhesive simultaneously in star-like catalyst J2 and connection delta tentaculum J1
(about 10ms pickup time simultaneously), causes air switch F1 short circuit, and then causes motor M to start unsuccessfully.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides the star three of a kind of threephase motor
Angle start-up circuit, to prevent from occurring in motor start-up procedure short circuit phenomenon, it is ensured that motor normally starts.
Problem described in the utility model is realized by techniques below scheme:
The star triangle start circuit of a kind of threephase motor, composition includes PLC, main contactor, connection delta
Tentaculum, star-like catalyst and the time relay, the head end of controlled motor threephase stator winding passes through main contactor
Normally opened contact connect power supply, tail end is by the normally opened contact short circuit of star-like catalyst and by connection delta tentaculum
Normally opened contact is connected with power supply after changing phase sequence, and the control coil of described main contactor connects the output port of PLC,
The control coil of described star-like catalyst meets the output port of PLC, institute by the normally-closed contact of connection delta tentaculum
State the control coil of connection delta tentaculum successively through on-delay normally opened contact and the star-like catalyst of the time relay
Normally-closed contact connect the output port of PLC, the control coil of the time relay is connected to the normally closed of star-like catalyst
Between the on-delay normally opened contact of contact and the time relay.
The star triangle start circuit of above-mentioned threephase motor, the normally opened contact of described main contactor contacts with triangle
It is provided with air switch between normally opened contact and the power supply of device.
The star triangle start circuit of above-mentioned threephase motor, the delay time of the described time relay is set as
0.3s。
This utility model is additionally arranged the time relay in conventional motors star triangle start circuit, makes connection delta
Tentaculum time delay adhesive, thus effectively prevent the generation of short trouble in star triangle transformation process, it is ensured that electricity
The normal startup of machine.
Accompanying drawing explanation
Fig. 1 is the major loop electrical schematic diagram of star triangle start circuit；
Fig. 2 is the control circuit theory figure of tradition star triangle start circuit；
Fig. 3 is control loop of the present utility model electrical schematic diagram.
Figure is respectively numbered: M, motor, F1, air switch, PLC, programmable controller, J0, master
Catalyst, J0-1, the normally opened contact of main contactor, J1, connection delta tentaculum, J1-1, connection delta tentaculum
Normally opened contact, J1-2, the normally-closed contact of connection delta tentaculum, J2, star-like catalyst, J2-1, star-like contact
The normally opened contact of device, J2-2, the normally-closed contact of star-like catalyst, KT, the time relay, KT-1, time
The on-delay normally opened contact of relay.
Detailed description of the invention
The utility model is described in further detail below in conjunction with the accompanying drawings.
Referring to Fig. 1 and Fig. 3, this utility model includes that air switch F1, PLC, main contactor J0, triangle contact
Device J1, star-like catalyst J2 and time relay KT.Main contactor J0, connection delta tentaculum J1 contact with star-like
The control coil of device J2 is controlled by Q0.0, Q0.1 and Q0.2 output port of PLC respectively.Time relay KT
It is connected in the control loop of connection delta tentaculum J1.
The adhesive of original connection delta tentaculum J1 and star-like catalyst J2 and release are all directly to use PLC to carry out
Control, and the two is contactor interlocking, connection delta tentaculum J1 and star-like catalyst when star triangular transformation
The normally opened contact (main contacts) of J2 there are about the time of 10ms and is also turned on, and causes air switch F1 short circuit.
Now the control coil of time relay KT is connected in parallel on the control coil of connection delta tentaculum J1, time relay
The on-delay normally opened contact KT-1 of device is connected in the control loop of connection delta tentaculum J1.When motor M by
Wye connection is when triangular form connection is changed, and the Q0.1 port of PLC sends control signal, time relay KT
Control coil obtain electric, but the on-delay normally opened contact KT-1 of the time relay can't close immediately, three
The control coil of corner connection tentaculum J1 also will not immediately electric, only after time delay terminates, the time relay logical
Electricity time delay normally opened contact KT-1 Guan Bi, the control coil of connection delta tentaculum J1 just can obtain electric, then motor M
It is converted into triangular form connection and runs well.The delay time that time relay KT sets is as 0.3s, it is to avoid
During star triangular transformation, connection delta tentaculum J1 connects while star-like catalyst J2.
Claims (3)
1. a star triangle start circuit for threephase motor, is characterized in that, composition includes that PLC, master connect
Tentaculum (J0), connection delta tentaculum (J1), star-like catalyst (J2) and the time relay (KT), controlled electricity
The head end of machine (M) threephase stator winding connects power supply by the normally opened contact (J0-1) of main contactor, and tail end leads to
Cross normally opened contact (J2-1) short circuit of star-like catalyst and by the normally opened contact (J1-1) of connection delta tentaculum
Being connected with power supply after changing phase sequence, the control coil of described main contactor (J0) connects the output port of PLC,
The control coil of described star-like catalyst (J2) meets PLC by the normally-closed contact (J1-2) of connection delta tentaculum
Output port, the control coil of described connection delta tentaculum (J1) is successively through the on-delay of the time relay
The normally-closed contact (J2-2) of normally opened contact (KT-1) and star-like catalyst connects the output port of PLC, time
The control coil of relay (KT) is connected to normally-closed contact (J2-2) and the time relay of star-like catalyst
Between on-delay normally opened contact (KT-1).
The star triangle start circuit of threephase motor the most according to claim 1, is characterized in that, described
Set between normally opened contact (J0-1) and normally opened contact (J1-1) and the power supply of connection delta tentaculum of main contactor
Having air switch (F1).
The star triangle start circuit of threephase motor the most according to claim 1 and 2, is characterized in that,
The delay time of the described time relay (KT) is set as 0.3s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620489343.3U CN205792315U (en) | 2016-05-25 | 2016-05-25 | A kind of star triangle start circuit of threephase motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620489343.3U CN205792315U (en) | 2016-05-25 | 2016-05-25 | A kind of star triangle start circuit of threephase motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205792315U true CN205792315U (en) | 2016-12-07 |
Family
ID=58110608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620489343.3U Expired - Fee Related CN205792315U (en) | 2016-05-25 | 2016-05-25 | A kind of star triangle start circuit of threephase motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205792315U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107565855A (en) * | 2017-09-06 | 2018-01-09 | 南京越博电驱动系统有限公司 | A kind of star triangle threephase asynchronous machine decompression starting system based on PLC controls |
| CN109802601A (en) * | 2019-01-04 | 2019-05-24 | 江苏嘉轩智能工业科技股份有限公司 | A kind of starting control circuit of small-power asynchronous starting permasyn morot |
| CN110347109A (en) * | 2019-08-05 | 2019-10-18 | 合肥合安智为科技有限公司 | A kind of fog gun linkage unit control circuit |
-
2016
- 2016-05-25 CN CN201620489343.3U patent/CN205792315U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107565855A (en) * | 2017-09-06 | 2018-01-09 | 南京越博电驱动系统有限公司 | A kind of star triangle threephase asynchronous machine decompression starting system based on PLC controls |
| CN109802601A (en) * | 2019-01-04 | 2019-05-24 | 江苏嘉轩智能工业科技股份有限公司 | A kind of starting control circuit of small-power asynchronous starting permasyn morot |
| CN110347109A (en) * | 2019-08-05 | 2019-10-18 | 合肥合安智为科技有限公司 | A kind of fog gun linkage unit control circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20161207 Termination date: 20210525 |