CN106026345B - A kind of voltage-sag prevention device of motor - Google Patents
A kind of voltage-sag prevention device of motor Download PDFInfo
- Publication number
- CN106026345B CN106026345B CN201610541061.8A CN201610541061A CN106026345B CN 106026345 B CN106026345 B CN 106026345B CN 201610541061 A CN201610541061 A CN 201610541061A CN 106026345 B CN106026345 B CN 106026345B
- Authority
- CN
- China
- Prior art keywords
- alternating current
- inverter
- motor
- input
- contactor
- 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.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
Abstract
The present invention discloses a kind of voltage-sag prevention device of motor, the device includes input breaker, rectifier, diode, afterflow capacitance, inverter, transformer, thyristor, in the control loop of motor start and stop main circuit, when alternating current occurs shaking electricity, turn on thyristors, inverter inversion exports the alternating current before electricity is shaken with appearance with frequency, alternating current with width and with phase, after alternating current occurs shaking electricity, device controls inverter to export within the time less than 2ms, ensure the lasting closure of the contactor of control loop, so as to which motor can continue to run well, the power supply that the present invention passes through inverter circuit, ensure that motor control loop voltage is not shaken electricity by the external world and interfered, avoid the heavy losses occurred during industrial production.
Description
Technical field
The present invention relates to electricity field, the equipment that belongs between AC and DC, mutually converted between direct current and exchange, tool
Body is a kind of voltage-sag prevention device of motor.
Background technology
With the development of society, demand of the people to electric power is more and more apparent, some industrial occasions get over the dependence of electric power
Come bigger, and motor is chemical industry quantity-produced important equipment, and each voltage fluctuation (shaking electricity) will directly affect motor
Normal operation and chemical plant installations continuous production.Existing motor control mode is generally using stop-and-go-guarantor's control loop, master
It is from motor main circuit to want principle, draws control power supply, then by start button, holding circuit, stop button to motor
Started, run, shutting down control.
The shortcomings that existing apparatus is mainly that control loop is easily influenced by major loop with deficiency, and the control loop part of motor connects
Tentaculum controls voltage for alternating current 220V, when short trouble or flashover electric discharge, when causing " shaking electricity ", network voltage occur for system voltage
It will reduce rapidly, when network voltage is less than 70%, operation coil is because the suction to iron core is less than release spring in control circuit
Elastic force without be attracted, cause contactor device dead electricity disconnect, cause motor stopping, heavy losses caused to industrial production.
Invention content
A kind of voltage-sag prevention device of motor provided by the invention, when there is " shaking electricity " situation, which will not cause motor
Unexpected power-off, and great loss is brought to industrial production.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of voltage-sag prevention device of motor includes the second input circuit breaker Q F2, rectifier U, diode FD, afterflow capacitance C, inverse
Become device UI, transformer T, the second thyristor JZG2, output circuit breaker Q F.
Alternating current inputs L1 phases and is connect by the described second input circuit breaker Q F2 with the input terminal of the rectifier U, described whole
The output terminal for flowing device U connects the anode of the diode FD, and the cathode of the diode FD connects the one of the inverter UI
Input terminal, another output terminal of the rectifier U connect another input terminal of the inverter UI, the afterflow capacitance C and institute
The two input terminals connection of inverter UI is stated, the output terminal of the inverter UI passes through the transformer T and second thyristor
JZG2 connections, the second thyristor JZG2 are connect with the output circuit breaker Q F.
The rectifier U will be converted to direct current by the AC energy of the second input circuit breaker Q F2.
The afterflow capacitance C is connected in parallel on the both ends of inverter, plays filtering, by the direct current after rectified device U rectifications
Electricity is filtered.
The filtered direct currents of afterflow capacitance C are converted to alternating current by the inverter UI.
The transformer T by the alternating current after inverter UI inversions by boosting, reaches contactor in energy control loop
The voltage that coil is persistently attracted.
Beneficial effects of the present invention：A kind of voltage-sag prevention device of motor when encountering " shaking electricity ", passes through the confession of inverter circuit
Electricity solves the halting problem in the case of motor " shake electricity ", has ensured the safety of important equipment, have great economic benefit and
Safety benefit.
Description of the drawings
In order to facilitate the understanding of those skilled in the art, the present invention is further illustrated below in conjunction with the accompanying drawings.
Fig. 1 is three phase electric machine start and stop main circuit diagram of the present invention；
Fig. 2 is three phase electric machine starting or stopping control circuit figure of the present invention.
Specific embodiment
A kind of voltage-sag prevention device of motor, when short trouble or flashover electric discharge occur for alternating current, when causing " shaking electricity ", which leads to
The power supply of inverter circuit is crossed, solves the halting problem in the case of motor " shaking electricity ".
As shown in Figure 1, three phase electric machine start and stop main circuit includes alternating current input L1 phases, alternating current input L2 phases, alternating current input L3
Phase, the first input circuit breaker Q F1, contactor KM main contacts, motor M, as shown in Fig. 2, three phase electric machine starting or stopping control circuit includes
Alternating current input L1 phases, the first thyristor JZG1, the second thyristor JZG2, the second input circuit breaker Q F2, rectifier U, diode
FD, afterflow capacitance C, inverter UI, transformer T, contactor KM auxiliary contact, contactor KM coils, output circuit breaker Q F,
In, anti-shake electric installation includes the second input circuit breaker Q F2, rectifier U, diode FD, afterflow capacitance C, inverter UI, transformer
T, the second thyristor JZG2.
Alternating current input L1 phases, alternating current input L2 phases, alternating current input L3 phases are defeated by first in three phase electric machine start and stop main circuit
Enter circuit breaker Q F1 to connect with contactor KM main contacts, contactor KM main contacts connection motor M；Three phase electric machine starting or stopping control circuit
Middle alternating current input L1 be connected the first thyristor JZG1 one end and connect one end of the second input circuit breaker Q F2, the second input
The input terminal of the other end connection rectifier U of circuit breaker Q F2, an output terminal of rectifier U are connected by the cathode of diode FD
In an input terminal of inverter UI, another output terminal of rectifier U is connect with another input terminal of inverter UI, in inverter UI
Two input terminals between the output terminal of connection one afterflow capacitance C, inverter UI pass through transformer T and the second thyristor JZG2 company
It connects, the second thyristor JZG2 is connected to by exporting circuit breaker Q F between the first thyristor JZG1 and contactor KM auxiliary contact
On node, start button SA1 is in parallel with contactor KM auxiliary contact, contactor KM auxiliary contact pass sequentially through stop button SA2,
Contactor KM coils are connect with zero curve.
When alternating current is normal, in the control loop of alternating current input L1 phases, after being manually pressed by start button SA1, coil KM
Coil obtains electric, is closed the contactor KM in the contactor KM and control loop in corresponding major loop, entire circuit is defeated by alternating current
Enter the first input circuit breaker Q F1 under L1 phases, alternating current input L2 phases, alternating current input L3 phase Amenorrhea conjunction states, using closure
Contactor KM main contacts under state powers to motor M, makes motor normal operation, at this time in control loop, alternating current input L1 phases
The contactor KM auxiliary contact under the first thyristor JZG1 and the closed state under conducting state are passed sequentially through all the way, finally by
Zero curve N is connected to ground, and another way becomes direct current after the second input circuit breaker Q F2 under closed state by rectifier U
Electricity, the direct current are filtered by afterflow capacitance C, and filtered direct current is converted into alternating current by inverter UI, most afterwards through becoming
Depressor T boosts.In this process, inverter UI is by synchronized sampling circuit tracing alternating current, at this point, the second thyristor JZG2 is closed
Disconnected, inverter UI is not exported.
When alternating current occurs shaking electricity, device detects that line voltage, more than 2ms, and is quickly made and being sentenced down to below 180V
Disconnected, the first thyristor JZG1 shutdowns, the second thyristor JZG2 is connected, and inverter UI inversions export and do not occur shaking the alternating current before electricity
It with frequency, the alternating current with width and with phase, exports through the second thyristor JZG2, by exporting circuit breaker Q F, powers to motor M, it should
Process only has contactor KM coils the power-off time of 2ms, not will disconnect in the time interior loop KM1 actuations of power-off, corresponding
Contactor KM main contacts continues to be closed, so as to which motor M can continue to run well.
When city power recovery voltage, the second thyristor JZG2 continues to be connected, and the first thyristor JZG1 becomes from off state
Conducting state, inverter UI power with alternating current for motor M simultaneously, and then the second thyristor JZG2 is turned off；Entire circuit is again extensive
The state that alternating current is motor M power supplies is arrived again.
In the control circuit of alternating current input L1 phases, when being manually pressed by stop button SA2, coil KM dead electricity is corresponding
Contactor KM is disconnected, and motor M shuts down.
Above content is only the design example and explanation to the present invention, affiliated those skilled in the art
Various modifications or additions are done to described specific embodiment or are substituted in a similar way, without departing from invention
Design or surmount range defined in the claims, be within the scope of protection of the invention.
Claims (4)
1. a kind of voltage-sag prevention device of motor, it is characterised in that：The voltage-sag prevention device of motor includes the second input breaker
QF2, rectifier U, diode FD, afterflow capacitance C, inverter UI, transformer T, the second thyristor JZG2, output circuit breaker Q F；
Alternating current inputs L1 phases and is connect by the described second input circuit breaker Q F2 with the input terminal of the rectifier U, the rectifier
An output terminal of U connects the anode of the diode FD, and the cathode of the diode FD connects an input of the inverter UI
End, another output terminal of the rectifier U connect another input terminal of the inverter UI, the afterflow capacitance C with it is described inverse
Become the two input terminals connection of device UI, the output terminal of the inverter UI passes through the transformer T and the second thyristor JZG2
Connection, the second thyristor JZG2 are connect with the output circuit breaker Q F；
The rectifier U will be converted to direct current by the AC energy of the second input circuit breaker Q F2；
The afterflow capacitance C is connected in parallel on the both ends of inverter, play a part of filtering, by the direct current after rectified device U rectifications into
Row filtering；
The filtered direct currents of afterflow capacitance C are converted to alternating current by the inverter UI；
The transformer T by the alternating current after inverter UI inversions by boosting, reaches contactor coil in energy control loop
The voltage being persistently attracted；
The second thyristor JZG2 plays electronic switch, the output of control inverter UI.
2. a kind of voltage-sag prevention device of motor according to claim 1, it is characterised in that：When alternating current is normal, it is manually pressed by
In control loop after start button SA1, contactor KM coils obtain electric, and corresponding contactor KM auxiliary contact are closed, entire circuit by
Three-phase mains through the first input circuit breaker Q F1, contactor KM main contacts, power to motor M successively, make motor normal operation, this
When control loop in, alternating current input L1 phases pass sequentially through all the way under the first thyristor JZG1 and closed state under conducting state
Contactor KM auxiliary contact, are connected to ground finally by zero curve N, and another way passes through the second input breaker under closed state
After QF2, become direct current by rectifier U, which filters by afterflow capacitance C, and filtered direct current passes through inversion
Device UI is converted into alternating current, most boosts afterwards through transformer T, in this process, inverter UI passes through synchronized sampling circuit tracing
Alternating current, at this point, the second thyristor JZG2 is turned off, inverter UI is not exported.
3. a kind of voltage-sag prevention device of motor according to claim 1, it is characterised in that：In alternating current normal power supply, entirely
Circuit is by alternating current input L1 phases, alternating current input L2 phases, alternating current input L3 phases by the first input circuit breaker Q F1, contactor KM master
Contact powers to motor M；In the control loop, after being manually pressed by start button SA1, contactor KM coils obtain electric actuation, connect
Tentaculum KM auxiliary contact are closed, and the alternating current is connected all the way by the first thyristor JZG1, contactor KM auxiliary contact and zero curve N
It connects, another way is successively by the second input circuit breaker Q F2, rectifier U, diode FD, inverter UI, afterflow capacitance C, transformer
T, device is by synchronized sampling circuit tracing alternating current in the process, and at this point, the second thyristor JZG2 is turned off, inverter UI
It does not export.
4. a kind of voltage-sag prevention device of motor according to claim 1, it is characterised in that：In the control loop, if manually
When pressing stop button SA2, the power down of contactor KM coils disconnects so that the contactor KM in major loop is disconnected, and motor M stops fortune
Turn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610541061.8A CN106026345B (en) | 2016-07-11 | 2016-07-11 | A kind of voltage-sag prevention device of motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610541061.8A CN106026345B (en) | 2016-07-11 | 2016-07-11 | A kind of voltage-sag prevention device of motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106026345A CN106026345A (en) | 2016-10-12 |
| CN106026345B true CN106026345B (en) | 2018-06-12 |
Family
ID=57109929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610541061.8A Active CN106026345B (en) | 2016-07-11 | 2016-07-11 | A kind of voltage-sag prevention device of motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106026345B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108767865A (en) * | 2018-07-05 | 2018-11-06 | 安徽省化工设计院 | A kind of fast switch type voltage-sag prevention device of motor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074996A (en) * | 2011-01-26 | 2011-05-25 | 江苏斯菲尔电气股份有限公司 | Voltage shock avoiding circuit |
| CN104867781A (en) * | 2015-04-19 | 2015-08-26 | 奉化市宇创产品设计有限公司 | AC contactor anti-electricity-dazzling module |
| CN105067905A (en) * | 2015-07-17 | 2015-11-18 | 国家电网公司 | Frequency converter power electronics controllable loading method based on grid connected inverter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56166733A (en) * | 1980-05-26 | 1981-12-22 | Sanken Electric Co Ltd | Switching method between inverter and commercial power soruce |
-
2016
- 2016-07-11 CN CN201610541061.8A patent/CN106026345B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074996A (en) * | 2011-01-26 | 2011-05-25 | 江苏斯菲尔电气股份有限公司 | Voltage shock avoiding circuit |
| CN104867781A (en) * | 2015-04-19 | 2015-08-26 | 奉化市宇创产品设计有限公司 | AC contactor anti-electricity-dazzling module |
| CN105067905A (en) * | 2015-07-17 | 2015-11-18 | 国家电网公司 | Frequency converter power electronics controllable loading method based on grid connected inverter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106026345A (en) | 2016-10-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104868586B (en) | Automatic switching power supply circuit for double-way power supply | |
| CN106026345B (en) | A kind of voltage-sag prevention device of motor | |
| CN205490211U (en) | Miniwatt switching power supply circuit of multiplexed output | |
| CN205249093U (en) | Pole change debugging control panel based on PLC three -phase asynchronous motor | |
| CN107565542A (en) | A kind of quiet tune power-supply system of urban rail | |
| CN104333267B (en) | Star triangle intelligent soft starting controller based on PIC | |
| CN203513001U (en) | Elevator integrated controller | |
| CN207691709U (en) | A kind of Quick-speed braking arrangement for threephase asynchronous machine | |
| CN206114861U (en) | High voltage circuit breaker electric switch's test device | |
| CN107947643B (en) | Ship motor start-stop control circuit | |
| CN204761141U (en) | Overload protection device double loop power supply automatic switch -over circuit | |
| CN205985764U (en) | Block terminal with open -phase protection | |
| CN203339950U (en) | Elevator control power supply device | |
| CN206164353U (en) | Electricity -saving device | |
| CN205960626U (en) | Default phase protection circuit | |
| CN109448952A (en) | A kind of low pressure pre-magnetizing system and method for high-power fairing | |
| CN102842894B (en) | Motor open-phase protection device without auxiliary power supply | |
| CN217135154U (en) | Contactor direct current start control circuit based on electric capacity | |
| CN202817718U (en) | Motor open-phase protecting device with no auxiliary power supply | |
| CN213484760U (en) | Single-phase power supply voltage regulator | |
| CN103944464B (en) | The compensated voltage regulator of oil pumper self-start permanent magnet synchronous | |
| CN220380237U (en) | Electrical control system for improving heat treatment process performance | |
| CN210402092U (en) | Power supply loop switching control system of energy-saving device | |
| CN214958882U (en) | Synchronous signal switching loop | |
| CN211127134U (en) | Protection circuit for preventing single-phase electric equipment from mistakenly accessing three-phase power |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |