CN2768306Y - Motor soft starter using silicon controlled ACVV - Google Patents
Motor soft starter using silicon controlled ACVV Download PDFInfo
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- CN2768306Y CN2768306Y CN 200420023779 CN200420023779U CN2768306Y CN 2768306 Y CN2768306 Y CN 2768306Y CN 200420023779 CN200420023779 CN 200420023779 CN 200420023779 U CN200420023779 U CN 200420023779U CN 2768306 Y CN2768306 Y CN 2768306Y
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- motor
- soft starter
- bypass
- interface
- copper bars
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Abstract
The utility model discloses a motor soft starter using controlled silicon to carry out AC voltage regulation, which is connected between a motor and a motor power supply for starting the motor. The motor soft starter using controlled silicon to carry out AC voltage regulation comprises three input copper bars which are connected with a three-phase power supply input interface, three output copper bars which are connected with the motor, a controlled silicon assembly and a control board, wherein the control plate is provided with an AC 220V, 50HZ power supply output interface, a running state indicating interface, a failure indicating interface, a bypass operating circuit and a control signal interface. The motor soft starter is also connected to a bypass contactor, wherein each of the three output copper bars of the motor soft starter is provided with a current mutual inductor and also comprises three bypass copper bars. The motor soft starter is connected to the bypass contactor through the bypass copper bars. By making use of the technical scheme of the utility model, starting voltage is controlled through controlled silicon voltage regulation and rises according to an ideal curve. The motor soft starter monitors starting conditions in real time by adding the bypass contactor. If an abnormal situation occurs, such as overload, under-voltage, power supply phase failure, etc., the utility model can discover in time and consequently the starting safety of the motor is improved.
Description
Technical field
The utility model relates to the starting and control equipment of motor, relates in particular to a kind of motor starter that uses the SCR AC pressure regulation.
Background technology
In industrial circles such as metallurgy, chemical industry, building, mine, use motor device widely, wherein the most commonly used is mouse cage AC type asynchronous machine.This kind motor is that back-emf is main load, promptly is to use back-emf to come the balance external making alive.When motor starting, back-emf can increase and becomes big gradually along with the rotating speed of rotor, so the impulse current during starting is very big.When capacity motor is big, can cause the safe operation of disturbing or even endangering electrical network to electrical network and other loads.In order to address this problem, need to use starting to control voltage when starting, being voltage changes in mode relatively slowly, is called soft start.More particularly, be the angle of flow that utilization is serially connected with the thyristor of the soft-starter control inside between power supply and the controlled motor, the motor input voltage started from scratch rise gradually, until proceed-to-send with the preset function relation, give the motor full voltage, be soft start.The method of the control of soft start has multiple, presses start mode, star-triangle conversion starting or the like such as early stage autotransformer.Popular mode is to use the SCR AC voltage-regulating technique at present.
A kind of motor soft starter of use SCR AC pressure regulation commonly used as shown in Figure 1.This motor soft starter 100 is connected between motor and the motor power, is used for actuating motor.It comprises:
The processor (not shown in figure 1).
Three phase mains input interface 102 is connected in three copper busbar R, T and S, connects alternating current L1, L2 and the L3 of three-phase respectively.
Motor power output interface 104 is connected in three output copper bar U, V, W, respectively three-phase electricity is outputed to U1, V1 and the W1 end of motor.
(control board is not shown in Fig. 1 for one control board, but its interface is shown in Figure 1), it has running status indication interface 106, can an external status indicator lamp represents the running status of motor, but this interface is a passive interface, needs to use the working power that adds.Faulty indication interface 108 also can represent whether motor has fault to take place, and this interface also is a passive interface, needs to use the working power that adds by an external status indicator lamp.
Bypass contact coil 110 contacts normal opened contact 112 with bypass, bypass working power 114 provides working power to bypass contact coil 110.Bypass working power 114 has two kinds of working methods: adopt the 380V voltage power supply or adopt the 220V voltage power supply.When adopting the voltage of 380V, the circuit shown in adopting in the frame of broken lines shown in Figure 1, it comprises a fuse, at this moment, L1 is connected in the voltage of 380V, N does not need use.If use the voltage of 220V, then do not need the circuit in the frame of broken lines, the voltage that directly N is connected 220V gets final product.Bypass contact coil 110 and bypass normal opened contact 112 have constituted bypass contactor together, and wherein, when bypass contact normal opened contact 112 closures, the machine operation power supply will directly link to each other with motor and no longer pass through soft starter 100.In the process that starts, bypass contact normal opened contact 112 is in the state of often opening, so working power is connected to motor by soft starter.After startup finished, the effect that contacts coil 110 by bypass made normal opened contact 112 closures.
Control signal interface 116, provide stop in wink, softly stop, soft these three function signals and a common port, the note in the reference diagram.The working power of soft starter 100 is provided by power interface 118.
Voltage when this kind uses the motor soft starter of SCR AC pressure regulation to control starting by silicon-controlled voltage regulation makes it rise according to comparatively ideal curve.But; this kind soft starter has a tangible weak point; be exactly its not defencive function such as overload, under-voltage, power supply phase shortage,, so can not play the effect of the safe operation of monitoring and protecting motor if abnormal conditions such as overload, under-voltage, power supply phase shortage just can not find in time.
Summary of the invention
The purpose of this utility model provides a kind of SCR AC pressure regulation motor soft starter that can monitor starting condition effectively in real time, and it can monitor the voltage of starting, the generation of fixing a breakdown in time in starting.
In order to achieve the above object, the utility model is to use following technical scheme:
A kind of motor soft starter that uses the SCR AC pressure regulation, be connected between motor and the motor power, start described motor, comprise three input copper bars that connect the three phase mains input interface, three output copper bars that connect motor, silicon controlled component and control board, wherein, described control board has the motor power output interface, running status indication interface, the faulty indication interface, bypass operating circuit and control signal interface, described motor soft starter is also connected to bypass contactor, it is characterized in that
In three input copper bars of described motor soft starter each has a current transformer;
Also comprise three bypass copper bars, described motor soft starter is connected to described bypass contactor by described bypass copper bar.
Preferable, described motor soft starter comprises, processor is controlled described control board work and processing signals; The power conversion sync detection device carried out sampled signal before described silicon controlled component, be input to described processor; Current sensing means is connected to described current transformer, and sampling exports the current signal of described motor to from described motor soft starter, and is input to described processor; The trigger impulse generation device is connected to described processor, produces trigger impulse.
In order to monitor the circuit of motor in real time, this soft starter also comprises analog signal output interface, the start-stop running current size when the described electric motor starting of sampling moves.
According to an embodiment, this soft starter also comprises input/output unit, is connected to described processor.
After having adopted the technical solution of the utility model, soft starter is the situation of monitoring voltage and electric current in real time, can find the fail safe when helping improving electric motor starting in time for abnormal conditions.
Description of drawings
Feature of the present utility model, essence and advantage will be below become more obvious after in conjunction with the accompanying drawings and embodiments the explanation.
Fig. 1 is the control principle figure of the motor soft starter of use SCR AC of the prior art pressure regulation;
Fig. 2 is the control principle figure of the motor soft starter of an embodiment of the present utility model;
Fig. 3 is the control board structure principle chart of motor soft starter in the foregoing description;
Fig. 4 is the major loop connection layout of motor soft starter of the present utility model;
Fig. 5 is the outside drawing of input/output unit in the foregoing description.
Embodiment
Fig. 2 is the structure chart of the motor soft starter of use SCR AC of the present utility model pressure regulation.From Fig. 2, itself and soft starter major different shown in Figure 1 are that its bypass circuit from independently interface output, is shown L11, L12 and L13 among Fig. 2, are called the bypass copper bar.In fact, another improvement of the present utility model is all have a current transformer on each of three input copper bar R, S, T.。
With reference to figure 4, Fig. 4 is the major loop connection layout of motor soft starter of the present utility model, and wherein 120 is silicon controlled components, all has a current transformer 206 on each of three input copper bar R, S, T.Three bypass copper bar L11, L12 and L13 are connected before the silicon controlled component 120, it should be noted that, the link position of three bypass copper bar L11, L12 and L13 is after current transformer 206, that is to say that the electric current of being exported by bypass copper bar L11, L12 and L13 is through the electric current after the current transformer 206.The output of bypass copper bar connects bypass contact normal opened contact 112, and it is a K switch M.The other end of silicon controlled component 120 is connected to V, U, the W end of motor, and bypass circuit also is connected to V, U, the W end of motor.In the stage that starts, normal opened contact 112 is opened, and the power supply of motor is provided after silicon controlled component 120 by input, after startup finishes, and normal opened contact 112 closures, motor is directly powered by power supply by bypass.
The control board structure principle chart of motor soft starter 200 of the present utility model comprises as shown in Figure 3:
Processor 204 is controlled described control board work and processing signals.
Power conversion sync detection device 202, be connected to three phase mains, this sync detection device 202 obtains current signal by the current transformer on three input copper bars, and power conversion sync detection device 202 is sampled signal before silicon controlled component 120, is input to processor 204.
Current sensing means 208 is connected to motor, need utilize three current transformers on the input copper bar to sample equally and export the signal of motor from motor soft starter 200 to, and be input to processor 204.
Trigger impulse generation device 210 is connected to processor 204, produces trigger impulse.Processor 204 is controlled the starting process of motor according to the current signal of power conversion sync detection device 202 and current sensing means 208 collections.
From Fig. 3, be also shown in the also concrete control bypass of processor 204 normal opened contact 112, faulty indication interface 108 and control signal interface 116.These connect with prior art in identical.In this embodiment, processor 204 has also connected input/output unit 300, Fig. 5 is the outside drawing of input/output unit 300, wherein, input unit is a keyboard and display unit is a light-emitting diode display, in this embodiment, be 6 keys push-button switch as keyboard and with the light-emitting diode display of 58 hop count sign indicating numbers and three light-emitting diodes as display unit.
Return Fig. 2, soft starter shown in Fig. 2 and another difference of the prior art are that it also comprises analog signal output 124, by can the sample size of current of motor of analog signal output 124, for example use the analog current signal of 0～20mA, its current signal with sampling is used in combination the operation conditions in the time of can obtaining electric motor starting more exactly.
Adopt the technical solution of the utility model, the voltage in the time of can controlling starting by silicon-controlled voltage regulation makes it rise according to comparatively ideal curve.And this kind soft starter is by increasing the situation that current transformer is monitored starting in real time on the input copper bar, if the situation of outlet electric voltage exception can find in time, thereby the fail safe when improving electric motor starting.
The foregoing description provides to being familiar with the person in the art and realizes or use of the present utility model; those skilled in the art can be under the situation that does not break away from invention thought of the present utility model; the foregoing description is made various modifications or variation; thereby protection range of the present utility model do not limit by the foregoing description, and should be the maximum magnitude that meets the inventive features that claims mention.
Claims (4)
1. motor soft starter that uses the SCR AC pressure regulation, be connected between motor and the motor power, start described motor, comprise three input copper bars that connect the three phase mains input interface, three output copper bars that connect motor, silicon controlled component and control board, wherein, described control board has the motor power output interface, running status indication interface, the faulty indication interface, bypass operating circuit and control signal interface, described motor soft starter is also connected to bypass contactor, it is characterized in that
In three input copper bars of described motor soft starter each has a current transformer;
Also comprise three bypass copper bars, described motor soft starter is connected to described bypass contactor by described bypass copper bar.
2. the soft device of motor as claimed in claim 1 moves device, it is characterized in that, the control board that described motor soft starter comprises comprises,
Processor is controlled described control board work and processing signals;
The power conversion sync detection device carried out sampled signal before described silicon controlled component, be input to described processor;
Current sensing means is connected to described current transformer, and sampling exports the current signal of described motor to from described motor soft starter, and is input to described processor;
The trigger impulse generation device is connected to described processor, produces trigger impulse.
3. motor soft starter as claimed in claim 1 or 2 is characterized in that, also comprises analog signal output interface, the start-stop running current size of the described motor of sampling.
4. motor soft starter as claimed in claim 1 or 2 is characterized in that, also comprises input/output unit, is connected to described processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420023779 CN2768306Y (en) | 2004-06-16 | 2004-06-16 | Motor soft starter using silicon controlled ACVV |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420023779 CN2768306Y (en) | 2004-06-16 | 2004-06-16 | Motor soft starter using silicon controlled ACVV |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2768306Y true CN2768306Y (en) | 2006-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420023779 Expired - Fee Related CN2768306Y (en) | 2004-06-16 | 2004-06-16 | Motor soft starter using silicon controlled ACVV |
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| CN (1) | CN2768306Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102545776A (en) * | 2012-02-21 | 2012-07-04 | 天津天安起重电器有限公司 | Variable frequency control circuit and control method for electric hoist |
| CN102570928A (en) * | 2010-12-31 | 2012-07-11 | 上海雷诺尔科技股份有限公司 | Motor soft starter |
| CN102916626A (en) * | 2012-11-06 | 2013-02-06 | 陕西科技大学 | Three-phase chopper control soft starter |
| CN102946217A (en) * | 2012-11-06 | 2013-02-27 | 陕西科技大学 | Two-phase chopper control soft starter |
| CN103501134A (en) * | 2013-10-11 | 2014-01-08 | 昆山市润苏物资有限公司 | Soft starter for squirrel-cage motor |
| CN103901826A (en) * | 2012-12-27 | 2014-07-02 | 四川红华实业有限公司 | Control cabinet specially used for pumping-out system |
| CN106357165A (en) * | 2016-09-29 | 2017-01-25 | 合肥申通电力科技有限公司 | Starting magnetic control optimizing device of motor |
-
2004
- 2004-06-16 CN CN 200420023779 patent/CN2768306Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570928A (en) * | 2010-12-31 | 2012-07-11 | 上海雷诺尔科技股份有限公司 | Motor soft starter |
| CN102545776A (en) * | 2012-02-21 | 2012-07-04 | 天津天安起重电器有限公司 | Variable frequency control circuit and control method for electric hoist |
| CN102916626A (en) * | 2012-11-06 | 2013-02-06 | 陕西科技大学 | Three-phase chopper control soft starter |
| CN102946217A (en) * | 2012-11-06 | 2013-02-27 | 陕西科技大学 | Two-phase chopper control soft starter |
| CN102946217B (en) * | 2012-11-06 | 2016-03-23 | 陕西科技大学 | Two-phase chopper control soft starter |
| CN103901826A (en) * | 2012-12-27 | 2014-07-02 | 四川红华实业有限公司 | Control cabinet specially used for pumping-out system |
| CN103501134A (en) * | 2013-10-11 | 2014-01-08 | 昆山市润苏物资有限公司 | Soft starter for squirrel-cage motor |
| CN106357165A (en) * | 2016-09-29 | 2017-01-25 | 合肥申通电力科技有限公司 | Starting magnetic control optimizing device of motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20081212 Address after: 1, 3980 North Road, Shanghai, Jiading District, China: 201807 Patentee after: Shanghai RENLE Science & Technology Co., Ltd. Address before: No. 131 East Road, Jiading District, Shanghai, China: zip code: 201821 Patentee before: Leinuoer Electrical Co., Ltd., Shanghai |
|
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI RENAULT ER TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: SHANGHAI RENAULT ER ELECTRIC APPLICANCE CO., LTD. Effective date: 20081212 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060329 |