CN202261123U - Series connection type voltage-regulating soft starter - Google Patents
Series connection type voltage-regulating soft starter Download PDFInfo
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- CN202261123U CN202261123U CN2011202476796U CN201120247679U CN202261123U CN 202261123 U CN202261123 U CN 202261123U CN 2011202476796 U CN2011202476796 U CN 2011202476796U CN 201120247679 U CN201120247679 U CN 201120247679U CN 202261123 U CN202261123 U CN 202261123U
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- soft starter
- autotransformer
- starting
- switch
- motor
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Abstract
The utility model discloses a series connection type voltage-regulating soft starter, which comprises a main soft starter power supply, a starting switch, an autotransformer, an electromagnetic stepless voltage regulator, an isolating switch, an operation switch and an electromotor; the main soft starter power supply is connected with the input end of the autotransformer through the starting switch; the step-down output end of the autotransformer is connected with the electromotor through the isolating switch; the common end of the autotransformer is connected in series with the electromagnetic stepless voltage regulator and then short-circuited; and the main soft starter power supply is connected with the electromotor through the operation switch. After the series connection type voltage-regulating soft starter is adopted, the starting current of the power grid side can be decreased for the starting of the electromotor, and thereby the power grid construction investment can be reduced; by means of the regulation of the electromagnetic stepless voltage regulator, the starting torque of the electromotor can be matched with the counter torque of a load, consequently, the optimal starting effect of the electromotor is achieved, and the impact of the soft starter on the power grid, the motor and mechanical equipment is reduced.
Description
Technical field
The utility model relates to a kind of motor drawing device, particularly a kind of concatenation type pressure regulation soft starter device that is used for the starting large motor.
Background technology
The soft starter device that uses in the market all is that soft starter is sealed in the motor major loop, and it can satisfy the needs of flexible starter for electric motor through pressure regulation, but starting current all will reach more than 3 times.And traditional autotransformer is used for the motor reduced voltage starting; To be the principle of utilizing transformer design the ratio of the output of autotransformer and input less than 1 for it, and the input current of autotransformer is the K doubly (K is the proportionality coefficient of autotransformer) of output current when making motor starting.Because the reduced voltage starting of traditional autotransformer is the fixed proportion coefficient, makes it smaller for the accommodation of different loads operating mode because of proportionality coefficient is unadjustable.But electronic function is reliably started when guaranteeing heavy duty, and fixedly step-down ratio can not be too low for it, otherwise in starting process, cause secondary pulse or starting failure because of the too low meeting of torque.Too high because of the fixedly step-down proportionality coefficient of autotransformer again in the time of can be for the lighter load of starting, terminal voltage of motor be too high when having starting, to weak points such as motor and plant equipment starting-impact are excessive.
The utility model content
The utility model technical problem to be solved provides a kind of concatenation type pressure regulation soft starter device.
For solving the problems of the technologies described above; The utility model is realized as follows: a kind of concatenation type pressure regulation soft starter device comprises soft starter main power source, starting switch, autotransformer, electromagnetic stepless voltage regulator, isolating switch, run switch and motor; Said soft starter main power source is connected with the input of said autotransformer through said starting switch; The step-down output of said autotransformer is connected with said motor through said isolating switch; The common port of said autotransformer is short circuit behind the said electromagnetic stepless voltage regulator that is connected in series, and said soft starter main power source is connected with said motor through run switch.
The good effect of the utility model is: adopt concatenation type pressure regulation self coupling soft starter device; Can reduce the starting current of grid side during motor starting; Can reduce the power grid construction investment, and pass through the adjusting of electromagnetic stepless voltage regulator, make the starting torque of motor and load resistive torque be complementary; Reach the optimum start effect of motor, reduced the impact of soft starter device electrical network, motor and plant equipment.
Description of drawings
Fig. 1 is the structural representation of the concatenation type pressure regulation soft starter device that embodiment provided of the utility model;
Fig. 2 is the structural representation of the concatenation type pressure regulation soft starter device that another embodiment provided of the utility model;
Wherein, 1 soft starter main power source, 2 starting switchs, 3 autotransformers
4 electromagnetic stepless voltage regulators, 5 isolating switches, 6 run switchs
7 motor
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation.
As shown in Figure 1; One of the utility model concatenation type pressure regulation soft starter device that embodiment provided comprises soft starter main power source (1), starting switch (2), autotransformer (3), electromagnetic stepless voltage regulator (4), isolating switch (5), run switch (6) and motor (7); Said soft starter main power source (1) is connected through the input of said starting switch (2) with said autotransformer (3); The step-down output of said autotransformer (3) is connected with said motor (7) through said isolating switch (5); The common port of said autotransformer (1) is short circuit behind the said electromagnetic stepless voltage regulator (4) that is connected in series, and said soft starter main power source (1) is connected with said motor (7) through run switch (6).
As shown in Figure 2; The concatenation type pressure regulation soft starter device that another embodiment of the utility model is provided comprises soft starter main power source (1), starting switch (2), autotransformer (3), electromagnetic stepless voltage regulator (4), isolating switch (5), run switch (6) and motor (7); Said soft starter main power source (1) is connected with said electromagnetic stepless voltage regulator (4) through said starting switch (2); Said electromagnetic stepless voltage regulator (4) is connected in series with the input of said autotransformer (3); The common port short circuit of said autotransformer (3); The step-down output of said autotransformer (3) is connected with said motor (7) through said isolating switch (5), and said soft starter main power source (1) is connected with said motor (7) through run switch (6).
Use the course of work of this concatenation type pressure regulation soft starter device: during system's ready to start motor (7); Starting switch (2), isolating switch (5) closure; Run switch (6) breaks off, and soft starter main power source (1) is connected to the upper end of autotransformer (3) through starting switch (2).The centre tap of autotransformer (3) is by fixing design ratio output voltage, and it is less than supply voltage.Adjust to minimum state because of the electromagnetic stepless voltage regulator (4) that is serially connected on the autotransformer (3) this moment, and the centre tap output voltage that makes autotransformer (3) is a minimum value, and to motor (7), slowly rotate by motor (7) beginning through isolating switch (5) for this voltage.Along with the carrying out of starting, progressively to regulate electromagnetic stepless voltage regulator (4) and make the centre tap output voltage values of autotransformer (3) bring up to maximum, motor (7) quickens.When the approaching full speed of motor speed, break off starting switch (2) and isolating switch (5), closed immediately run switch (6), motor (7) gets into the total head running status, and starting process is accomplished.
The good effect of the utility model is: adopt the autotransformer mode to carry out the starting current that reduced voltage starting can reduce electrical network.Adopt concatenation type pressure regulation self coupling soft starter device; It during its voltage regulator operation the size that changes electromagnetism in the voltage regulator through the angle of flow of control power electronic device thyristor; Through regulating the electromagnetic stepless voltage regulator output end voltage of autotransformer is changed during motor starting; The set end voltage scalable of motor reaches the purpose of soft start.Through after the adjusting of serial connection electromagnetic stepless voltage regulator it to have a cost low, control is simple, starting current is little, the characteristics of reliable operation.
Claims (2)
1. a concatenation type pressure regulation soft starter device is characterized in that, comprises soft starter main power source, starting switch, autotransformer, electromagnetic stepless voltage regulator, isolating switch, run switch and motor; Said soft starter main power source is connected with the input of said autotransformer through said starting switch; The step-down output of said autotransformer is connected with said motor through said isolating switch; The common port of said autotransformer is short circuit behind the said electromagnetic stepless voltage regulator that is connected in series, and said soft starter main power source is connected with said motor through run switch.
2. a concatenation type pressure regulation soft starter device is characterized in that, comprises soft starter main power source, starting switch, autotransformer, electromagnetic stepless voltage regulator, isolating switch, run switch and motor; Said soft starter main power source is connected with said electromagnetic stepless voltage regulator through said starting switch; The input of said electromagnetic stepless voltage regulator and said autotransformer is connected in series; The common port short circuit of said autotransformer; The step-down output of said autotransformer is connected with said motor through said isolating switch, and said soft starter main power source is connected with said motor through run switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202476796U CN202261123U (en) | 2011-07-14 | 2011-07-14 | Series connection type voltage-regulating soft starter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202476796U CN202261123U (en) | 2011-07-14 | 2011-07-14 | Series connection type voltage-regulating soft starter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202261123U true CN202261123U (en) | 2012-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202476796U Expired - Fee Related CN202261123U (en) | 2011-07-14 | 2011-07-14 | Series connection type voltage-regulating soft starter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202261123U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104426383A (en) * | 2013-08-29 | 2015-03-18 | 大禹电气科技股份有限公司 | Autotransformer voltage regulator circuit |
| CN109889103A (en) * | 2019-02-26 | 2019-06-14 | 杭州福斯达深冷装备股份有限公司 | A kind of adaptive soft-start by lowering voltage device and its control method |
-
2011
- 2011-07-14 CN CN2011202476796U patent/CN202261123U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104426383A (en) * | 2013-08-29 | 2015-03-18 | 大禹电气科技股份有限公司 | Autotransformer voltage regulator circuit |
| CN109889103A (en) * | 2019-02-26 | 2019-06-14 | 杭州福斯达深冷装备股份有限公司 | A kind of adaptive soft-start by lowering voltage device and its control method |
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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: 20120530 Termination date: 20180714 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |