CN201690397U - Internally-connected soft starter circuit structure - Google Patents
Internally-connected soft starter circuit structure Download PDFInfo
- Publication number
- CN201690397U CN201690397U CN2010201997005U CN201020199700U CN201690397U CN 201690397 U CN201690397 U CN 201690397U CN 2010201997005 U CN2010201997005 U CN 2010201997005U CN 201020199700 U CN201020199700 U CN 201020199700U CN 201690397 U CN201690397 U CN 201690397U
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- Prior art keywords
- soft starter
- soft
- utility
- model
- motor
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- Expired - Fee Related
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Abstract
The utility model discloses an internally-connected soft starter circuit structure, which comprises a three-phase power supply, a controlled motor and a soft starter, wherein the input end of the soft starter is connected with the three-phase power supply, the output end of the soft starter is connected with one same direction end of the winding of the controlled motor, and the other same direction end of the three-phase winding of the controlled motor is connected into the input end corresponded by the soft starter. The utility model can reduce the current passing through the soft starter when starting and running, and start a motor with same power, the soft starter can reduce one specification, therefore the size of the whole soft starter case can be reduced, and the section of the connected cable can also be reduced.
Description
Technical field
The utility model relates to the application of soft initiator, is applicable to the motor that can adopt star-triangle start, belongs to complete sets of electric switchgears and control devices product.
Background technology
Soft starter be the soft start of a kind of current collection machine, soft stop, light-load energy saving and kinds of protect function in the motor control assembly of one, be called Soft Starter abroad.As shown in Figure 1, its main composition is three-phase anti-parallel thyristor and the electronic control circuit thereof that is serially connected with between three phase mains 2 and the controlled motor 1. the utilization diverse ways, the angle of flow of control three-phase anti-parallel thyristor, the input voltage of controlled motor is changed by different requirements, rise gradually from zero with the preset function relation, until proceed-to-send, give the motor full voltage.In Soft Start-up Process, the electric motor starting torque increases gradually, and rotating speed also increases gradually, realizes the purpose of Control current simultaneously.
The utility model content
Technical problem to be solved in the utility model be to provide at the deficiencies in the prior art a kind of reduce to start and when moving by connecing the soft initiator circuit structure in the soft starter electric current, can will reduce to former connection electric current by the electric current of soft starter
To achieve these goals, the technical solution of the utility model is as follows:
Connect the soft initiator circuit structure in a kind of, comprise three phase mains, controlled motor and soft initiator, the input termination three phase mains of described soft initiator, the end in the same way of the controlled motor windings of output termination of soft initiator, it is characterized by, another of controlled motor three phase windings termination in the same way gone into the corresponding input of soft initiator.
Advantage of the present utility model is: can reduce and start and the electric current by soft starter during operation, reach the motor that starts same power, soft initiator can reduce a specification, and whole like this soft initiator box sizes reduces, and the cross-section of cable of connection also can reduce.
Description of drawings
Fig. 1 is the circuit connection diagram of existing motor soft starter.
Fig. 2 is the circuit connection diagram of motor soft starter of the present utility model.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Soft starter is specially adapted to various load of the pumps or fan-type load, needs the occasion of soft start and soft stop.Be in light running for a long time for varying load operating mode, motor equally, have only in short-term or moment is in heavily loaded occasion, use soft starter (not with bypass contactor) and then have the effect of light-load energy saving.
The soft start of motor is mainly in the following way:
1. reduction power supply voltage start;
2. reducing supply frequency starts;
3. reducing exciting current starts.
The soft start of so-called motor, essence is exactly to allow motor with lower current start, and is little to the impact of electrical network like this, can reduce the load allowance of transformer and main circuit simultaneously, improves the useful life of equipment.When general alternating current machine directly started, starting current was 6～10 times of running current, and after adopting soft Starting Technology, starting current has reduced by 1～3 times.
The utility model as shown in Figure 2, connection circuit has changed the method for attachment of soft initiator in the soft initiator in the motor, comprises three phase mains 2, controlled motor 3 and soft initiator 1.The input termination three phase mains 2 of soft initiator 1, a certain end in the same way of the controlled motor 3 of output termination of soft initiator 1, another of this controlled motor 3 held the input that inserts soft initiator by the figure connection in the same way.After using the utility model, can make start and during operation electric current by soft initiator further drop to the former connection electric current of soft starter
Detailed process is to increase gradually at the starting stage of motor starting starting current, reaches when electric current to keep constant after the value that sets in advance, finishes until starting.In the starting process, the speed that the electric current rising changes is to set according to the motor load adjustment.The electric current climbing speed is big, and then starting torque is big, and the starting time is short.After using the utility model, the electric current that flows through in the soft initiator 3 can reduce 42% again, so can reduce the specification of soft initiator, its casing and the cross-section of cable also reduce accordingly.
More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications; these changes and improvements all fall in claimed the utility model scope, and the claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (1)
1. connect the soft initiator circuit structure in one kind, comprise three phase mains, controlled motor and soft initiator, the input termination three phase mains of described soft initiator, the end in the same way of the controlled motor windings of output termination of soft initiator, it is characterized by, another of controlled motor three phase windings termination in the same way gone into the corresponding input of soft initiator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201997005U CN201690397U (en) | 2010-05-20 | 2010-05-20 | Internally-connected soft starter circuit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201997005U CN201690397U (en) | 2010-05-20 | 2010-05-20 | Internally-connected soft starter circuit structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201690397U true CN201690397U (en) | 2010-12-29 |
Family
ID=43378674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201997005U Expired - Fee Related CN201690397U (en) | 2010-05-20 | 2010-05-20 | Internally-connected soft starter circuit structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201690397U (en) |
-
2010
- 2010-05-20 CN CN2010201997005U patent/CN201690397U/en not_active Expired - Fee Related
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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 |
Granted publication date: 20101229 Termination date: 20190520 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |