CN214255830U - Anti-interference electricity device of low-voltage soft starter of thyristor - Google Patents
Anti-interference electricity device of low-voltage soft starter of thyristor Download PDFInfo
- Publication number
- CN214255830U CN214255830U CN202120249765.4U CN202120249765U CN214255830U CN 214255830 U CN214255830 U CN 214255830U CN 202120249765 U CN202120249765 U CN 202120249765U CN 214255830 U CN214255830 U CN 214255830U
- Authority
- CN
- China
- Prior art keywords
- switch
- thyristor
- soft starter
- static switch
- static
- Prior art date
- 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.)
- Expired - Fee Related
Links
- 239000007858 starting material Substances 0.000 title claims abstract description 42
- 230000005611 electricity Effects 0.000 title claims abstract description 32
- 230000003068 static effect Effects 0.000 claims abstract description 53
- 239000003990 capacitor Substances 0.000 claims abstract description 30
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 235000013365 dairy product Nutrition 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 239000003348 petrochemical agent Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Images
Landscapes
- Motor And Converter Starters (AREA)
Abstract
The utility model discloses a thyristor low pressure soft starter anti-interference electricity device, relate to anti-interference electricity technical field, including input circuit breaker QF1, contactor KM main contact and motor M, still include thyristor soft starter and anti-interference electricity device, thyristor soft starter control circuit establishes ties anti-interference electricity device, anti-interference electricity device includes service entrance switch K1, output switch K3, first static switch K4, second static switch K5, fairing U, conversion equipment UI and condenser C, in normal operating, service entrance switch K1 is closed, first static switch K4 is closed, output switch K3 is closed, second static switch K5 disconnection, conversion equipment UI charges for condenser C. After 'power dazzling' occurs, the first static switch K4 is closed, the second static switch K5 is closed, the capacitor C supplies power to the control loop through the conversion device UI, the second static switch K5 and the output switch K3, the uninterrupted power of the equipment is guaranteed, and the continuous stable operation of the production system is guaranteed.
Description
Technical Field
The utility model relates to an anti-interference electricity technical field, concretely relates to anti-interference electricity device of thyristor low pressure soft starter.
Background
The anti-interference technology is a technology for preventing the power supply voltage from temporarily dropping or disappearing and preventing the power supply voltage from being interrupted in a short time (generally within a few seconds). This technique is commonly used in industrial process equipment because these devices are particularly sensitive to voltage sags because any one component within the equipment will cause the entire process to stop operating due to a power supply problem. These industrial processes relate to the fields of automobiles, semiconductors, plastics, petrochemicals, textiles, optical fibers, beverage dairy, mobile communications, etc., and important devices often affected by voltage sag are cooling device control, direct current motor drive, Programmable Logic Controllers (PLC), mechanical devices, speed-adjustable drive devices, etc.
In order to prevent the impact of large current on a power grid and other electric equipment when a low-voltage high-power motor is started, a large number of low-voltage soft starters which are mainly thyristor soft starters are often used in occasions without speed regulation.
Because the thyristor soft starter is a sensitive load, when the grid has a voltage surge and a voltage dip, the thyristor soft starter can jump at a low voltage. The method can cause great economic loss to important units with continuous production requirements such as petrochemical industry, national defense aviation and the like, and the current anti-interference electricity treatment method adopted in the power industry mainly comprises the following steps: supplying power by an Uninterruptible Power Supply (UPS); secondly, switching a standby power supply by a static switch (STS); fast switch switching (MS) standby power supply; and fourthly, a Dynamic Voltage Restorer (DVR). The anti-interference electricity equipment is expensive in manufacturing cost and difficult to popularize and apply in a large range.
Therefore, it is highly desirable to solve the above problems.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims to provide an anti-interference electricity device of thyristor low pressure soft starter, at anti-interference electricity device of thyristor soft starter control circuit series connection, through the circuit integrated design of inlet wire switch, output switch, first static switch, second static switch, fairing, conversion equipment and condenser in the anti-interference electricity device, after "shaking electricity" produces, can not lead to the motor outage suddenly, avoid producing production and safe great economic loss, and the reasonable facilitate promotion of device cost is used.
The utility model discloses a following technical scheme realizes:
an anti-interference electricity device of a thyristor low-voltage soft starter comprises an input breaker QF1, a contactor KM main contact, a motor M, a thyristor soft starter and an anti-interference electricity device, wherein a control loop of the thyristor soft starter is connected with the anti-interference electricity device in series, the anti-interference electricity device comprises an incoming line switch K1, an output switch K3, a first static switch K4, a second static switch K5, a rectifying device U, a conversion device UI and a capacitor C, wherein a mains supply input L2 is connected with one end of the incoming line switch K1 through a shunt circuit L21 between the input breaker QF1 and the main contact of a contactor KM, the other end of the incoming line switch K1 is connected with an input end of the conversion device UI and one end of the first static switch K4 respectively, the incoming line switch K1 is connected with the conversion device UI through the rectifying device U, and the other end of the first static switch K4 is connected with one end of the second static switch K5 and one end of the output switch K3 respectively, the other end of the second static switch K5 is connected with an output end of the conversion device UI, the other output end of the conversion device is also connected with a capacitor C, and the other end of the output switch K3 is connected with the thyristor soft starter control loop.
It can be understood that the rectifying device U converts the alternating current passing through the incoming line switch K1 into direct current; the capacitor C receives the direct current transmitted by the conversion device UI and stores the direct current therein.
In the scheme, in normal operation, the incoming line switch K1 is closed, the first static switch K4 is closed, the output switch K3 is closed, the second static switch K5 is opened, and the conversion device UI charges the capacitor C. When the 'power dazzling' condition happens, the first static switch K4 is closed, the second static switch K5 is closed, the capacitor C supplies power to the control loop through the conversion device UI, the second static switch K5 and the output switch K3, the uninterrupted power of the equipment is guaranteed, and the continuous stable operation of the production system is guaranteed.
Further, the conversion device U includes an inverter and a charger, wherein the inverter is responsible for converting the direct current transmitted by the capacitor C into alternating current, and the charger is responsible for charging the capacitor.
Preferably, when the rectifying device U passes through one end of the incoming switch K1 and is connected to the alternating current of the mains supply branch circuit L21, the rectifying device U converts the alternating current into the direct current and transmits the direct current to the charger, and the charger is connected to the capacitor C and charges the capacitor C.
Preferably, the capacitor C is connected to the inverter, and when the capacitor C is discharged, the inverter converts the direct current transmitted by the capacitor C into alternating current and transmits the alternating current through the second static switch K5 and the output switch K3.
Preferably, a bypass switch K2 is arranged between one end of the incoming switch K1 and the other end of the output switch K3, and after the electric dazzling device fails, the control loop can be switched on to supply power to the soft starter normally by closing the bypass switch K2.
Preferably, a controller is further connected between the anti-interference electricity device and the thyristor soft starter, and the controller controls the on and off of the incoming line switch K1, the first static switch K4, the second static switch K5 and the output switch K3.
It should be noted that the controller controls the on/off of the switch, and the switching time is less than 5ms, so as to ensure that each electronic element in the control loop is kept in a normal attraction state, and in addition, when the electricity shaking time of the power grid system exceeds a low-voltage delay fixed value set by the soft starter, the soft starter performs fault tripping.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
the utility model relates to a thyristor low pressure soft starter anti-interference electricity device, normal during operation, service entrance switch K1 is closed, and first static switch K4 is closed, and output switch K3 is closed, and second static switch K5 disconnection, conversion equipment UI charge for condenser C. When the motor "electric dazzling" condition takes place, first static switch K4 is closed, second static switch K5 is closed simultaneously, condenser C passes through conversion equipment UI, second static switch K5 and output switch K3 provide the power to control circuit, guarantee that equipment does not have a power failure, guarantee production system's continuous steady operation, through the service entrance switch in the opposition electric dazzling device, output switch, first static switch, the second static switch, fairing, the circuit combination design of conversion equipment and condenser, can not lead to the motor to cut off the power supply suddenly, avoid producing the great economic loss of production and safety, and the reasonable facilitate promotion of device cost is used.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a main circuit diagram of a three-phase motor start/stop in an embodiment of the present invention;
fig. 2 is a working schematic diagram of an anti-interference electricity device in an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of an anti-interference electricity device of a thyristor low-voltage soft starter in the embodiment of the present invention;
fig. 4 is a schematic diagram of the switch control in the embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail so as not to obscure the present invention.
Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the present invention. Thus, the appearances of the phrases "one embodiment," "an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the description of the present invention, it should be understood that the terms "front", "back", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the scope of the present invention.
Examples
As shown in fig. 1 and fig. 2, the utility model relates to a thyristor low-voltage soft starter anti-interference device, which comprises an input breaker QF1, a contactor KM main contact and a motor M, and further comprises a thyristor soft starter and an anti-interference device, the thyristor soft starter control loop is connected in series with the anti-interference device, the anti-interference device comprises an incoming switch K1, an output switch K3, a first static switch K4, a second static switch K5, a rectifying device U, a conversion device UI and a capacitor C, wherein, the commercial power input L2 is connected with one end of an incoming switch K1 through a branch circuit L21 between the input breaker QF1 and the contactor KM main contact, the other end of the incoming switch K1 is connected with one end of the conversion device UI and one end of the first static switch K4, the incoming switch K1 is connected with the conversion device UI through the rectifying device U, the other end of the first static switch K4 is connected with one end of a second static switch K5 and one end of the output switch K3, the other end of the second static switch K5 is connected with one output end of the conversion device UI, the other output end of the conversion device is also connected with a capacitor C, the other end of the output switch K3 is connected with a thyristor soft starter control loop, and the rectifying device U converts alternating current passing through the incoming line switch K1 into direct current; and a capacitor C for receiving and storing the direct current transmitted by the conversion device UI.
When the mains supply is normal, the coil of the contactor KM is electrified, the auxiliary contact of the corresponding contactor KM is closed, the whole circuit supplies power to the motor M through the input breaker QF1 and the main contact of the contactor KM in sequence by the three-phase mains supply, so that the motor works normally, at the moment, in the control loop, the branch circuit L21 of the mains supply input L2 phase position between the input breaker QF1 and the main contact of the contactor KM passes through the incoming line switch K1, at the moment, the first static switch K4 is closed, the second static switch K5 is disconnected, the rectifying device U accesses the alternating current and converts the alternating current into the direct current, and the direct current is transmitted to the super capacitor C through the conversion device UI.
When the utility power is abnormal, under the above conditions, the second static switch K5 is closed, the super capacitor converts the ac power into dc power through the conversion device UI and transmits the dc power to the control circuit through the second static switch K5 and the output switch K3 in sequence to provide power.
Preferably, the converter device is provided with an inverter and a charger, wherein the inverter is responsible for converting the dc power transmitted by the capacitor C into ac power, and the charger is responsible for transmitting the dc power transmitted by the rectifier device U to the capacitor for charging.
Specifically, as shown in fig. 1 and 2, when the rectifying device U is connected to the ac power of the mains supply branch line L21 through one end of the incoming switch K1, the rectifying device U converts the ac power into a dc power and transmits the dc power to the charger, and the charger is connected to and charges the capacitor C.
Specifically, as shown in fig. 2, the capacitor C is connected to an inverter, and when the capacitor C is discharged, the inverter converts the dc power transmitted from the capacitor C into ac power and transmits the ac power through the second static switch K5 and the output switch K3.
Preferably, a bypass switch K2 is arranged between one end of the incoming line switch K1 and the other end of the output switch K3, and after the electric dazzling device breaks down, the control loop can be switched on to supply power to the soft starter normally by closing the bypass switch K2.
In addition, as shown in fig. 3 and 4, a controller is connected between the anti-interference device and the thyristor soft starter, and the controller controls the on and off of the incoming line switch K1, the first static switch K4, the second static switch K5 and the output switch K3.
It can be understood that when the grid voltage interference fault occurs, the alternating current control power supply is output to the control loop by the anti-voltage interference device of the thyristor soft starter, so that the control loop of the thyristor soft starter keeps normal power supply and is matched with the low-voltage fixed value parameter of the soft starter, thereby achieving the purpose that the equipment is not stopped when the grid voltage interference occurs and ensuring the continuous and stable operation of the production system, wherein the anti-voltage interference device is matched with the low voltage in the parameter of the thyristor soft starter.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. The anti-interference electricity device of the thyristor low-voltage soft starter comprises an input breaker QF1, a contactor KM main contact and a motor M, and is characterized by further comprising a thyristor soft starter and an anti-interference electricity device, wherein a control loop of the thyristor soft starter is connected with the anti-interference electricity device in series, and the anti-interference electricity device comprises an incoming line switch K1, an output switch K3, a first static switch K4, a second static switch K5, a rectifying device U, a conversion device UI and a capacitor C;
the utility power input L2 is connected to one end of the incoming line switch K1 through a shunt L21 between the input breaker QF1 and the main contact of the contactor KM, the other end of the incoming line switch K1 is connected to the input end of the switching device UI and one end of the first static switch K4, the incoming line switch K1 is connected to the switching device UI through a rectifying device U, the other end of the first static switch K4 is connected to one end of the second static switch K5 and one end of the output switch K3, the other end of the second static switch K5 is connected to one output end of the switching device UI, the other output end of the switching device UI is further connected to a capacitor C, and the other end of the output switch K3 is connected to the thyristor soft starter control loop.
2. The anti-interference device of the thyristor low-voltage soft starter according to claim 1, wherein the conversion device U comprises an inverter and a charger.
3. The anti-interference electricity device of the thyristor low-voltage soft starter of claim 2, wherein when the rectifying device U is connected to the alternating current of the mains supply branch circuit L21 through one end of the incoming switch K1, the rectifying device U converts the alternating current into the direct current to be transmitted to the charger, and the charger is connected to and charges the capacitor C.
4. The anti-interference device of the thyristor low-voltage soft starter according to claim 2, wherein the capacitor C is connected with the inverter, and when the capacitor C discharges, the inverter converts the direct current transmitted by the capacitor C into alternating current and transmits the alternating current through the second static switch K5 and the output switch K3.
5. The anti-interference electricity device of the low-voltage soft starter of the thyristor of claim 1, wherein a bypass switch K2 is arranged between one end of the incoming switch K1 and the other end of the output switch K3.
6. The anti-interference electricity device of the low-voltage soft starter of the thyristor of claim 1, wherein a controller is further connected between the anti-interference electricity device and the soft starter of the thyristor, and the controller controls the on and off of the incoming line switch K1, the first static switch K4, the second static switch K5 and the output switch K3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120249765.4U CN214255830U (en) | 2021-01-27 | 2021-01-27 | Anti-interference electricity device of low-voltage soft starter of thyristor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120249765.4U CN214255830U (en) | 2021-01-27 | 2021-01-27 | Anti-interference electricity device of low-voltage soft starter of thyristor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214255830U true CN214255830U (en) | 2021-09-21 |
Family
ID=77796231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120249765.4U Expired - Fee Related CN214255830U (en) | 2021-01-27 | 2021-01-27 | Anti-interference electricity device of low-voltage soft starter of thyristor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214255830U (en) |
-
2021
- 2021-01-27 CN CN202120249765.4U patent/CN214255830U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20220045512A1 (en) | Inverter of grid-connected photovoltaic power generation system, startup apparatus, method, and system | |
| CN110994590A (en) | Voltage sag treatment system based on light storage system and control method thereof | |
| CN101162843B (en) | Combined uninterrupted power supply | |
| CN203813439U (en) | Automatic voltage regulator of distribution line | |
| CN110912109A (en) | Low-voltage direct-current power supply and distribution equipment and method | |
| CN110021925A (en) | DC power-supply system and its control method | |
| CN202196302U (en) | Mining explosion-proof and intrinsic safety vacuum combination switch control system | |
| CN112448408A (en) | Inverter, starting device, method and system of photovoltaic grid-connected power generation system | |
| CN214255830U (en) | Anti-interference electricity device of low-voltage soft starter of thyristor | |
| Liu et al. | A study on VSC-HVDC based black start method | |
| CN209375234U (en) | A kind of DC UPS | |
| CN116404679A (en) | Micro-grid compensation device and micro-grid compensation method | |
| CN107947236B (en) | Energy-saving inversion boosting complete device and method for photovoltaic power generation | |
| CN107196419B (en) | Energy storage unit and method for providing short-time high-power supply | |
| CN204706867U (en) | A kind of protection system of mine-used frequency-converter | |
| CN103904776A (en) | Intelligent power distribution room power system | |
| CN110137961B (en) | O-type load power supply system of thermal power plant and control method | |
| CN219717935U (en) | Voltage sag protection device suitable for direct-current bus end of low-voltage frequency converter | |
| CN217607699U (en) | Slow starting device of three-phase grid-connected star-connected chain type current converter | |
| CN104967088B (en) | The protection system of mine-used frequency-converter | |
| CN214756117U (en) | Magnetic valve type reactor self-coupling voltage-reduction soft start and high-voltage switch cabinet integrated device | |
| CN216851317U (en) | Multifunctional self-checking closing power supply device | |
| CN220732381U (en) | Flexible control system of box-type transformer of photovoltaic power station | |
| CN217643192U (en) | System for starting high-power motor off grid | |
| CN219696336U (en) | Electromagnetic anti-interference electric contactor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210921 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |