CN218547278U - Low-voltage silicon controlled soft start device and application equipment thereof - Google Patents
Low-voltage silicon controlled soft start device and application equipment thereof Download PDFInfo
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- CN218547278U CN218547278U CN202222688271.3U CN202222688271U CN218547278U CN 218547278 U CN218547278 U CN 218547278U CN 202222688271 U CN202222688271 U CN 202222688271U CN 218547278 U CN218547278 U CN 218547278U
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Abstract
The application discloses a low-voltage silicon controlled soft start device and application equipment thereof, wherein the device comprises a power supply end, a power supply control end and a power supply control end, wherein the power supply end is used for providing a power supply signal; the first switch module is connected with the power supply end and used for disconnecting or connecting the power supply signal so as to change the charged state of each module; the first protection module is connected with the first switch module, prevents other modules from influencing the power supply end after faults occur, and is used for protecting the power supply end; and the soft start module is connected with the first protection module and used for receiving the power supply signal and changing the power supply signal into a charged state. The utility model discloses a mode of connection, last electricity that each components and parts homoenergetic is fine is reserve, and soft starter accomplishes the start process of self this moment, and after obtaining the enabling signal, the soft circuit that opens will start immediately, great shortening the start-up time. The utility model discloses a mode of connection makes soft starting drive go up the electricity after, and soft starter is electrified, and equipment self detects the back and normally stands by, can solve the reserve problem of soft start-up return circuit.
Description
Technical Field
The application relates to the technical field of soft start, in particular to a low-voltage silicon controlled soft start device and application equipment thereof.
Background
The existing low-voltage silicon controlled soft starter has the wiring mode that a contactor is arranged at the upper end of the soft starter, and after a normal equipment loop is electrified, the soft starter is not electrified, so that the soft starter triggers a fault signal of a control loop, and the control loop is not standby.
And secondly, because the low-voltage silicon controlled soft starter is not electrified, when a loop is started, the low-voltage silicon controlled soft starter is automatically started after being electrified, and then the motor is triggered and started after the low-voltage silicon controlled soft starter is started, so that the starting time of the whole equipment is longer.
And thirdly, the low-voltage silicon controlled soft starter is not electrified for a long time, the standby condition of the low-voltage silicon controlled soft starter cannot be displayed, and internal components are not electrified for a long time, so that the internal attenuation or even damage of the equipment is caused, and the service life of the whole equipment is shortened.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the application is to provide a low-voltage silicon controlled soft start device and application equipment thereof, which solve the problem of a fault state of a circuit under normal standby, prolong the service life of a soft starter and shorten the starting time.
A low-voltage silicon controlled soft start device comprises a power supply end, a power supply control circuit and a power supply control circuit, wherein the power supply end is used for providing a power supply signal;
the first switch module is connected with the power supply end and used for disconnecting or connecting the power supply signal so as to change the charged state of each module;
the first protection module is connected with the first switch module and is used for protecting the power supply end;
the soft start module is connected with the first protection module and used for receiving the power supply signal and changing the power supply signal into a charged state;
the second switch module is connected with the soft start module and used for providing a starting or closing instruction for the soft start module;
the third switch module is respectively connected with the soft start module and the second switch module and is used for receiving an opening or closing instruction sent by the soft start module so as to switch an operation route between the soft start module and an equipment end;
and the second protection module is positioned between the third switch module and the equipment end and used for protecting the equipment end.
As an optional embodiment, the power supply end is connected to a power grid system, and the power grid system provides a power supply signal required by the power supply end.
As an optional embodiment, a loop where the first switch module, the soft start module, and the second switch module are located forms a primary loop, and a loop where the third switch module is located forms a bypass loop.
As an optional embodiment, the first switch module is a circuit breaker, and the circuit breaker is located between the power end and the soft start module and is configured to conduct a loop between the power end and the soft start module so as to power on the soft start module.
As an optional embodiment, the first protection module employs a fuse, and the fuse is located between the circuit breaker and the soft start module and is used for cutting off short-circuit faults on the primary loop and the bypass loop.
As an optional embodiment, the second switch module adopts a first contactor, an incoming line end of the first contactor is connected with an outgoing line end of the soft start module, and an outgoing line end of the first contactor is connected with an outgoing line end of the third switch module.
As an optional embodiment, the third switch module adopts a second contactor, an incoming line end of the second contactor is connected with a bypass outgoing line end of the soft start module, and an outgoing line end of the second contactor is connected with an outgoing line end of the first contactor.
As an optional embodiment, the second protection module adopts a protector transformer, one end of the protector transformer is connected with an equipment end, and the outlet end of the first contactor and the outlet end of the second contactor are converged and then connected with the other end of the protector transformer.
As an alternative embodiment, the maskless transformer is associated with the circuit breaker for protecting a trip circuit.
The application equipment comprises a motor and the low-voltage silicon controlled soft start device, wherein the motor is connected with the equipment end.
The embodiment of the application has the beneficial effects that:
the utility model discloses a mode of connection, last electricity that each components and parts homoenergetic is fine is reserve, and soft starter accomplishes the start process of self this moment, and after obtaining the enabling signal, the soft circuit that opens will start immediately, great shortening the start-up time.
The utility model discloses a mode of connection makes soft starting drive go up the electric back, and soft starter is electrified, and equipment self detects the back and normally stands by, can solve the reserve problem of soft-start loop. When the soft starter is in a normal standby state, the soft starter is electrified, so that the standby state of the display can be displayed, the use is convenient, and the problem of short service life caused by internal attenuation can be solved.
The utility model can cut off the induction voltage through the first contactor, and stop the personal electric shock accident; the fuse protects the power grid system, prevents the short-circuit fault of the device from spreading to the power grid system, and prevents the fault from expanding; still protect this device through the ma guay mutual-inductor, many places protective apparatus make the safety in utilization and the reliability of this device obtain very big promotion.
Drawings
FIG. 1 is a block diagram of the present application;
FIG. 2 is a schematic view of an embodiment of the present application;
some of the reference numbers:
l, a power supply end; QF, breaker; FU and a fuse; SS, soft starter; KM1 and a first contactor; KM2 and a second contactor; LH, magno transformers; m, a motor.
Detailed Description
Various aspects and features of the present application are described herein with reference to the accompanying drawings.
It will be understood that various modifications may be made to the embodiments of the present application. Accordingly, the foregoing description should not be construed as limiting, but merely as exemplifications of embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the application.
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with a general description of the application given above and the detailed description of the embodiments given below, serve to explain the principles of the application.
These and other characteristics of the present application will become apparent from the following description of preferred forms of embodiment, given as non-limiting examples, with reference to the attached drawings.
It is also to be understood that although the present application has been described with reference to some specific examples, those skilled in the art are able to ascertain many other equivalents to the practice of the present application.
The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.
Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are merely exemplary of the application, which can be embodied in various forms. Well-known and/or repeated functions and constructions are not described in detail to avoid obscuring the application of unnecessary or unnecessary detail. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present application in virtually any appropriately detailed structure.
The description may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may each refer to one or more of the same or different embodiments in accordance with the application.
An object of an embodiment of the present invention is to provide a low-voltage scr soft start device, which is referred to as a soft start circuit hereinafter.
As shown in fig. 1 and fig. 2, a loop where the first switch module, the soft start module, and the second switch module are located forms a primary loop, and a loop where the third switch module is located forms a bypass loop. The circuit is divided into the contents known to those skilled in the art and therefore not described in detail herein.
A power supply terminal L for supplying a power supply signal; as an alternative embodiment, the power supply terminal L is connected to a power grid system, and the power grid system provides a power supply signal of AC 380V.
The first switch module is connected with the power supply end L and used for disconnecting or connecting the power supply signal so as to change the electrified state of each module; as an optional embodiment, the first switch module employs a circuit breaker QF, and the circuit breaker QF is located between the power source end L and the soft-start module and configured to conduct a loop between the power source end L and the soft-start module so as to power up the soft-start module.
When the circuit breaker QF conducts the power supply signal, the soft start module and the second switch module are powered on, and the soft start module is in a standby state. The breaker QF is used to isolate the device from the grid system.
The first protection module is connected with the first switch module, prevents other modules from influencing the power supply end L after faults occur, and is used for protecting the power supply end L; as an optional embodiment, the first protection module adopts a fuse FU, and the fuse FU is located between the circuit breaker QF and the soft start module, and is used for cutting off short-circuit faults on the primary loop and the bypass loop, and preventing the fault influence from continuing to expand to a power grid system.
When short-circuit large current occurs to equipment on the soft start loop, the soft start loop can be quickly disconnected, and the accident is prevented from being enlarged. When the fuse FU is selected, the fuse FU needs to be selected according to actual requirements, and the rated current value of the fuse FU is usually not less than 80A.
The soft start module is connected with the first protection module and used for receiving the power supply signal and changing the power supply signal into a charged state; the soft start module adopts a low-voltage silicon controlled soft start device SS.
The second switch module is connected with the soft start module and used for providing a starting or closing instruction for the soft start module; as an optional embodiment, the second switch module adopts a first contactor KM1, an incoming line end of the first contactor KM1 is directly connected with an outgoing line end of the soft start module, and an outgoing line end of the first contactor KM1 is connected with an outgoing line end of the third switch module.
When the soft starter SS is powered on and in a standby state, the first contactor KM1 sends a starting operation instruction to the soft starter SS, and the soft starter SS starts again. The wiring distance between the first contactor KM1 and the soft start module is less than 10cm, and other devices are not added in the middle, so that the starting time is shortened.
The first contactor KM1 is used as a key part for starting and stopping control, and can also isolate induction voltage in a shutdown state, namely, the first contactor has an isolation effect on a primary loop, so that electric shock accidents caused by the induction voltage generated by a thyristor in the soft starter SS can be effectively prevented, and the use safety is improved; meanwhile, the soft starter SS can be protected, and the service life of the soft starter SS is prolonged.
In addition, the first contactor KM1 can be used as a starting contactor, when the soft starter SS fails, the device end is connected with an electric device, and the circuit can be combined with a second protection module to directly start the electric device under the condition that the electric device allows direct starting.
And the third switch module is respectively connected with the soft start module and the second switch module and is used for receiving an opening or closing instruction sent by the soft start module so as to switch an operation route between the soft start module and the equipment end.
As an optional embodiment, the third switch module adopts a second contactor KM2, an inlet terminal of the second contactor KM2 is connected with a bypass outlet terminal of the soft start module, and an outlet terminal of the second contactor KM2 is connected with an outlet terminal of the first contactor KM 1.
When the soft starter SS starts in the initial stage, the current flows through the first contactor KM1 and then flows into the equipment end, and after the start is finished, the current directly flows into the equipment end from the second contactor KM2, and the first contactor KM1 does not pass the current, so that the switching of the running line is realized.
And the second protection module is positioned between the third switch module and the equipment end, prevents the equipment end from being influenced by faults of other modules and protects the equipment end.
As an optional embodiment, the second protection module adopts a transformer LH, one end of the transformer LH is connected to an equipment end, and an outlet end of the first contactor KM1 and an outlet end of the second contactor KM2 are merged and then connected to the other end of the transformer LH.
Therefore, under the two states of the starting process and the bypass operation of the soft starting device, the protection is more reliable by using the transformer LH as the backup protection of the equipment.
Wherein the transformer LH is associated with the breaker QF for protecting a trip circuit. The trip circuit breaker QF can be connected by setting the constant value of the transformer LH or the trip circuit can be protected according to the level of the constant value.
In a conventional soft start device, a first contactor KM1 is arranged at the upper end of a soft starter, and after a normal equipment loop is electrified, a soft starter SS is not electrified, so that the situation that the soft starter SS triggers a control loop fault signal to cause the control loop to be out of standby occurs.
And the mode of connection of this application, when soft start loop was gone up to electricity, soft starter SS was electrified, and equipment self detects the back and normally stands by, can solve soft start loop standby problem.
The working principle of the device is as follows:
firstly, the breaker QF is closed, so that after the soft starter SS is normally electrified, the soft start loop is in a normal standby state.
In the starting process, the first contactor KM1 is started firstly, after the first contactor KM1 is closed, the auxiliary contact of the first contactor KM1 sends a starting operation instruction to the soft starter SS, and after the soft starter SS obtains the starting operation instruction, the silicon controlled rectifier is triggered to be conducted, so that the motor M is started.
When the motor is started completely, the soft starter SS sends a bypass operation instruction, the second contactor KM2 is closed, the operation state of a bypass loop is changed from a primary loop, and the starting is completed. After the operating line state is switched, the primary circuit is out of operation, but the protection function is operated, and at the moment, the first contactor KM1 does not pass through current.
When the soft start loop is stopped, the first contactor KM1 is stopped, after the first contactor KM1 is disconnected, the soft starter SS loses a starting command, and the soft start loop is stopped; and the second contactor KM2 is stopped so that the motor M is stopped and the circuit is put on standby.
This kind of mode of connection, each components and parts homoenergetic is fine goes up the electricity standby, and soft starter SS accomplishes the start-up process of self this moment, and after obtaining the start signal, the soft start circuit will start immediately, great shortening the start-up time.
In addition, when the soft starter SS is in a charged state, the standby state of the display can be displayed, and the use is convenient; moreover, the soft starter SS is in a charged state, and the problem of short service life caused by internal attenuation can be avoided.
One of the purposes of the embodiments of the present application is also to provide an application device, which includes a motor M and further includes the aforementioned low-voltage thyristor soft start device, where the motor M is connected to the device terminal.
The transformer LH is used for carrying out whole-process protection on the motor M, the whole-process protection comprises the starting process and the running process of the motor M, and the transformer LH is used as standby protection of equipment, so that the equipment protection is more reliable.
The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present application and such modifications and equivalents should also be considered to be within the scope of the present application.
Claims (10)
1. A low-voltage silicon controlled soft start device is characterized by comprising a power supply end, a soft start circuit and a soft start circuit, wherein the power supply end is used for providing a power supply signal;
the first switch module is connected with the power supply end and used for disconnecting or connecting the power supply signal so as to change the charged state of each module;
the first protection module is connected with the first switch module and is used for protecting the power supply end;
the soft start module is connected with the first protection module and used for receiving the power supply signal and changing the power supply signal into a charged state;
the second switch module is connected with the soft start module and used for providing a starting or closing instruction for the soft start module;
the third switch module is respectively connected with the soft start module and the second switch module and is used for receiving an opening or closing instruction sent by the soft start module so as to switch an operation route between the soft start module and an equipment end;
and the second protection module is positioned between the third switch module and the equipment end and used for protecting the equipment end.
2. The low-voltage thyristor soft start device according to claim 1, wherein the power supply end is connected with a power grid system, and the power grid system provides a power supply signal required by the power supply end.
3. The low-voltage silicon controlled soft start device according to claim 1, wherein a loop in which the first switch module, the soft start module and the second switch module are located forms a primary loop, and a loop in which the third switch module is located forms a bypass loop.
4. The low-voltage silicon controlled soft start device according to claim 3, wherein the first switch module is a circuit breaker, and the circuit breaker is located between the power end and the soft start module and is used for conducting a loop between the power end and the soft start module to enable the soft start module to be powered on.
5. The low-voltage silicon controlled soft start device as claimed in claim 4, wherein the first protection module is a fuse, and the fuse is located between the circuit breaker and the soft start module and used for cutting off short-circuit faults on the primary loop and the bypass loop.
6. The low-voltage silicon controlled soft start device as claimed in claim 4, wherein the second switch module adopts a first contactor, an incoming line end of the first contactor is connected with an outgoing line end of the soft start module, and an outgoing line end of the first contactor is connected with an outgoing line end of the third switch module.
7. The low-voltage silicon controlled soft start device as claimed in claim 6, wherein the third switch module adopts a second contactor, an inlet terminal of the second contactor is connected with a bypass outlet terminal of the soft start module, and an outlet terminal of the second contactor is connected with an outlet terminal of the first contactor.
8. The low-voltage silicon controlled soft start device according to claim 7, wherein the second protection module adopts a Ma Bao mutual inductor, one end of the Ma Bao mutual inductor is connected with an equipment end, and an outlet end of the first contactor and an outlet end of the second contactor are converged and then connected with the other end of the Ma Bao mutual inductor.
9. The low voltage thyristor soft start device of claim 8, wherein the mason transformer is associated with the circuit breaker for protecting a trip circuit.
10. An appliance comprising an electric motor, characterized by further comprising a low voltage thyristor soft start device according to any one of claims 1 to 9, said electric motor being connected to said appliance terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222688271.3U CN218547278U (en) | 2022-10-12 | 2022-10-12 | Low-voltage silicon controlled soft start device and application equipment thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222688271.3U CN218547278U (en) | 2022-10-12 | 2022-10-12 | Low-voltage silicon controlled soft start device and application equipment thereof |
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| Publication Number | Publication Date |
|---|---|
| CN218547278U true CN218547278U (en) | 2023-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222688271.3U Active CN218547278U (en) | 2022-10-12 | 2022-10-12 | Low-voltage silicon controlled soft start device and application equipment thereof |
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| CN (1) | CN218547278U (en) |
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