CN1247410A - Centralized control system for electric motors - Google Patents
Centralized control system for electric motors Download PDFInfo
- Publication number
- CN1247410A CN1247410A CN 99104554 CN99104554A CN1247410A CN 1247410 A CN1247410 A CN 1247410A CN 99104554 CN99104554 CN 99104554 CN 99104554 A CN99104554 A CN 99104554A CN 1247410 A CN1247410 A CN 1247410A
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- CN
- China
- Prior art keywords
- motor
- loop
- switch
- control system
- relay
- 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.)
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- Motor And Converter Starters (AREA)
Abstract
A centralized control system for more large squirrel-cage AC motors started at low voltage and running at full voltage features use of short-time working mode, that is, more motors share a common starter equipment which sequentially starts each motor and after started,each motor is disconnected from the starter. Its advantages are less investment in apparatus, and saving energy.
Description
Description of drawings:
Figure one is principle system diagram of motor centralized control system of the present invention (device).
Figure two is W among the figure one
1-W
6The secondary control chart of switch.
Figure three is secondary control principle block diagrams of motor centralized control system device of the present invention.
Figure four is once B among the figure of the present invention
1-B
6, A-A ' winding diagram.
Figure five is semi-automatic startup of the present invention and automatic start-up operation control loop schematic diagram.
With reference to figure one explanation: capitalization one indicates number represents the three-phase disconnecting link; Two, three, four be respectively: 1 section, 0 section, II section three phase mains bus; T
1, T
0, T
2Be respectively the low-side switch that #1 becomes, #0 becomes, #2 becomes; M
1, M
2Be respectively: 1 section bus and #0 section bar coupler and #0 section and II section bar coupler.D
1-D
6Represent that respectively threephase motor is from No. 1 to No. 6; W
1-W
6Be and the corresponding run switch of motor, promptly from No. 1 motor switch-No. 6 motor switch.Square frame Q represents the three phase electric machine starting drive among the figure one; W
0Power supply power-cutting switch for Q; B among the figure one
1-B
6Wiring position for the three-phase voltage measuring relay of #1-#6 motor; A and A ' compare and measure the wiring position (its detailed wiring is drawn by figure four) in loop for Q output and input both end voltage.
W
1'-W
6' be respectively D
1-D
6The switch of isolating after the startup usefulness of motor and the startup, five, six, seven represent 1 section, 0 section, II section electric motor starting bus respectively; M
1', M
2' for starting the interconnection switch of bus.
Figure two explanation: ± KM are the control dc bus, and 1RD, 2RD are the dc operation insurance, and ZJ is an auxiliary relay, and FJ is the closing position relay, and HC is a closing relay, and TQ is a breaking coil, and KC is that switch control contact is to be provided by the centralized control quadratic diagram, K
2For 6 control cable among the figure three provides.KK is that model is: LW
2-z-1a, 4,6a, 40,20,20/F8 or LW
2-z-1a, 4,6a, 40,20, the multi-functional change over switch of 6a/F8.
LD, HD are respectively green, the red indicator light that stops, moving, and HA and TA are test button HA
0Be the test start button, BH is the protection loop, and+SM is the flash of light bus, and ZKK is the switch auxiliary contact.
Figure three explanations: the 1st, the difference protection of many merits kind power motor and protection series connection loop, contact
2 is W
0Switch and selection protection loop
3 are protection and control interlock circuit and interlocking loop
The 4th, YJ shown in the figure four of A-A '
AThe protection loop
The 5th, measure the busbar voltage supervisory relay
The 6th, the control starting drive carries out automatic control switch W when motor speed reaches certain value
1'-W
6' and W
1-W
6The purpose of correct switching
The 7th, the starting drive control loop i.e. the control loop of Q among the figure one
A
1→ A
6Be D
1-D
6It is the 1-6 motor control loop
The 8th, automatic and partial-automatic control starts the loop
RD
01, RD
02Be the operation insurance
A
0, C
0For its voltage of alternating current operation power supply is 380V or 220V
1,2,3 lines are designated as the operating power line
K
1-K
8Line is designated as to be measured and control cable
B
1-B
6Be the measurement point shown in the figure one, i.e. YJ among the figure four
5Measurement output
a
1-a
6Line is designated as D
1-D
6The control loop line
b
1-b
6Be the output lead of figure four B point measurements for the slotted line mark
→ be the control action direction, is the control that interacts.
Figure four explanations: the left side is the winding diagram that B is ordered shown in the figure one
The right is A-A ' a winding diagram shown in the figure one
ABC is a power line, and A ' B ' C ' is the output line of starting drive Q.
YJ
BAnd YJ
ABe homemade voltage relay.
Figure five explanation: A, C are that the alternating current operation power supply is 380 or 220V, and A ', C ' are the power supply of control motor D M.TA is a stop button.A
1, A
2, A
3It is start button.DM is the control motor.J
1-J
3It is auxiliary relay.DK is the moving contact that control motor D M is driven.ZK is that control drops into switch automatically.Q
1-Q
3Be still contact type contact.P is the Comprehensive Control loop of control motor D M.
The operation principle explanation:
Figure one operation principle: as starter motor D
1The time, W at first closes a switch
0With switch W
1' (W at this moment
1Disconnect) by starting drive to D
1Start, work as D
1When starting reaches certain rotating speed, by W
1The output that closes with (figure one) Q carries out disconnecting W after the parallel connection again with being in parallel
1' to observe starting current often in whole starting process.When finishing D
1Promptly finish W behind the electric motor starting
1With W
1' automatic switchover after, should observe D
1Running current whether normal.Must be when the motor on 1 section bus of startup at first with switch M
1With switch M
1' can start D after closing
3, D
4, start-up course and above-mentioned basic identical.D
5, D
6D roughly the same
3And D
4The startup method must be at first with M
2, M
2' closing is transformer parallel connection in short-term.Just can carry out D after the parallel connection
5, D
6The startup of motor.
M
1With M
1' action request: work as M
1Back M closes
1' just can close, as disconnected M
1The time, must at first disconnect M
1' switch.Require at M according to this
1And M
1Can be resolved in ' the switch control circuit, this is conspicuous.(M
2And M
1' with in like manner aforementioned).In startup, when adopting static frequency converter, should pass through voltage relay YJ
A(promptly shown in the figure four) identifies that the phase bit comparison is when reaching the same after date of homophase, YT
AAction makes W
1Switch carries out with being in parallel, and back in parallel disconnects M
1', also should adopt voltage ratio in order to prevent starting drive Q overcurrent, this task also is by YJ
AFinish, promptly relatively the voltage of the input of Q and output can carry out W for approaching when zero
1And W
1The switch operating of ' switch.
If the starting drive that adopts autotransformer is by YJ
ABe transferred to 20 volts of following actions.Output contact and YJ with this relay
BThe output contact of operation voltage more than 340V combine, finish W by 6 controls of figure three time-delay switching device shifters
1And W
1The switch operating of ' switch.
Figure two operation principles: 5., 8. multi-functional change over switch KK connects contact when closing position and send electricity with the direct current intermediate relay ZJ, in parallel with the control start button by the contact of ZJ, will connect the reduced-voltage starting that carries out this motor with starting the loop like this.When motor reaches certain rotating speed, provide signal and deliver to KC and make the charged total head operation of closing a floodgate of closing relay HC, disconnect and start the loop by 6 among the figure three.The operation closing circuit of the above motor switch is the design different with routine.Promptly be when closing a floodgate, utilize or 5., 8. contact carries out, but different be to be used for starting circuit operation, operation is through time-delay control and YJ
B, YJ
AAutomatic measurement, promptly when motor speed reaches certain value, it is 20～30 seconds of time-delay that the design adopts, and between the starting period, keep a close eye on the variation of observing starting current, makes starting current be controlled at 1.5～2 times of L
0Below the rated current.After time-delay, carry out W
1And W
1' switch and (only get D here
1The startup of motor is an example), handoff procedure is to close W earlier
1The disconnected W in back
1' switch.Utilize original multi-functional unit switch to start to all processes of operation in sum.The method that this design does not adopt this method to design this design through the domestic colleague that consults reference materials promptly is that former switch handle possesses to have to start and carries out the transition to running status, is to provide switching signal through control loop figure 36 to finish normal switching (W
1And W
1'), promptly reach the purpose that total head is moved.Originally design is just directly by 5., 8. this switch of contacting closing circuit carries out closing operation.This obviously is to have risen one-level on function comparing with original design.Do not influence protection loop regular event after improving, new operating process is more simple and convenient than origin operation process.
Figure three operation principles: at first provide selected certain power motor protection loop by 2 controls 1.The protection loop is W
0The protection of switch.
When twist switch operating handle during at closing position or when pressing start button (annotate both can be mutually for also can be independent, it is both dual-purposes that the design adopts).Promptly 8 provide selected startup loop.Provide this loop by 3 and whether can carry out start-up operation as working as startup D
3, D
4And D
5, D
6During motor, because of with W
0On a bus, do not move, so this loop has only the M of working as with miss operation
1And M
1', M
2And M
2' just can carry out D after closing
3, D
4And D
5, D
6Start-up operation.Owing to adopted measurement point B
1-B
6Point is
The result of measurement judges whether that this motor is moving, if give connection startup loop when stoppage in transit, otherwise starts the loop for connection, protects selection mistake in loop also (not to be A to connecting the startup loop by 2 controls 3 in addition
1-A
6Connection is sent).
4 is YJ
AMeasuring-signal (being shown in figure four A-A ') send 1 and 6, send 1 to be that YJ is worked as in control
ABe measured as 20 volts and can think run switch W when following
1-W
6Wherein certain is connected, disconnects and starts the loop and promptly disconnect corresponding W
1'-W
6' switch.Send 6 to be whether to carry out W for the control time-delay
1-W
6The operation of switch is as W below 20 volts the time
1-W
6Do not connect, can think that starting drive is no-load running, at this moment do not provide and connect W
1-W
6The signal of switch, i.e. K
2Do not signal.Figure two KC will disconnect closing circuit, so W
1-W
6Switch will can not close.
7 is the starting drive inner control loop, and it is to be subjected to 1,2,4,6 controls, wherein the 1,2, the 4th, control from operational power source circuit.
The 6th, control installing inside, make it satisfy entry condition, the 6th, the timing circuit central control device makes 7 to be subjected to 6 control, promptly after having started a motor by 6 send the stoppage in transit signal make 7 stop do standby.
8 is that a cover has the operation start circuit of self-locking circuit, and its principle is that each startup can only allow an electric motor starting loop connect, and is having one when this loop during at starting state, and it will be all inoperative pressing other button or twist switch handle again.Have only after this electric motor starting finishes, just can carry out the start-up operation of another motor.Other 8 is by semi-automatic.Automatic two kinds of functions are formed.
The 5th, the supervisory relay of measurement power source bus voltage provides low voltage signal when bus loss of pressure.By K
6Deliver to 8 and wait for that motor starts automatically one by one.Here illustrate that when bus loss of pressure, motor switch is provided with under-voltage protection with W
1-W
6The switch tripping.At this moment by FJ
1～FJ
6Provide shown in (figure two), switch combines with contact signal that bus provides after tripping operation, promptly constitutes to start the loop automatically, carries out the purpose that the stage time-delay can reach automatic starter motor by 8 delay circuits again.Because W at this moment
1-W
6Switch handle does not move position behind combined floodgate.Send electricity time by above-mentioned loop when bus, provide the work of a signal enabling automatic loop by 5, undertaken one by one by 8 that motor starts automatically, start will this system be stopped transport do by 6 controls after finishing standby.In addition, illustrate again because D
1-D
6When certain motor in maintenance when not allowing to start, can automatic loop do to start the work of this motor so? this situation can be got rid of fully, because the position difference at switch handle place (contact 2123 is obstructed) ZJ can be not charged, just this motor can not started (ZJ is at figure two) yet.Figure four operation principles: be general voltage ratio and measuring relay,
Be respectively B
1-B
6The three-phase voltage relay of measurement point is only used YJ in the mode of connection phase diagram because of them
BExpression.Its operation voltage is greater than 340V.YJ
ABe the homophase current potential of measuring starting drive output, input, operation voltage is less than 20 volts.
Figure five operation principles: manual control loop at first is described, its operation principle is to design (the seeing claim 8) of invention according to the structure of relay.Its content is to switch in a flash when pulling relay coil, produces big electric current and attract upper shed sections core in coil.Make it have certain acceleration and carry out adhesive, in the design of relay,, mostly adopt the hold down gag that spring or reed are arranged, also utilize this to compress performance just, make the contact that certain stroke all be arranged when on-off action in order to make its contact good.The present invention utilizes this short and small stroke to make iron core produce a responsiveness faster in the moment of relay adhesive, make it behind coil blackout, inertia by moving iron core action (speed), be enough to make the moving iron core of example to drive relay normally open contact and arrive on the position of connecting, also this principle is achieved success design of the present invention just.The function of figure five just is achieved in sum.8 functional effects of mentioning among the figure three just.Course of action is (through above explanation) J when by logical A1
1Action, action back J
1Keep sending by another loop (loop of each relay normally-closed contact of promptly not connecting) that directly connects power supply by this relay and normally opened contact.And at this moment press other start button all with inoperative.Have only when by after crossing figure five TA stop buttons (with J
1The outage back) just can carry out A
1-A
3Single any startup of button.It is the same to press other button actions principle.
Figure five automatic control loops explanations: when 5 providing a signal and exist among the DM Comprehensive Control loop P in by figure three behind the bus loss of pressure, P provides the signal of starting DM control motor when bus recovers to send electricity.This signal will drive motor and rotate, and make its requirement according to automatic startup work go work.It is to arrange by descending power of motor in proper order that automatic loop requires still.Be to carry out automatically actuatedly one by one, do not exist more than two simultaneously to start.What figure 38 started employing automatically is a motor (its rotating speed is 1-5 rev/min) by operation circuit control, the slide that has an insulation on the motor shaft, the relative motion of this moving plate and still dish obtains output contact, the contact is carried out operating sequence by the descending power of motor and is arranged on quiet dish, when rotor contact and still contacting, constitute the startup circuit operation power connection of certain motor, carry out the automatic startup work of this motor.After the initiating task of finishing this motor, the control motor will turn on the startup contact of another motor automatically.Make another motor obtain the same startup effect.When running into certain motor because a variety of causes, as the protection action, at this moment control motor power and connect and be rotated further, will be every crossing the leave office startup work of motor of this motor.Rotate back into again and treat automatic start-up control position as the starting rear motor DM that finishes at last.After (shown in figure five) all startup work were finished, motor is automatically brought to treated automatic start-up control position, and that sends at this moment that release graphics 35 provides exists signal among the P.
More than be better simply line design scheme, can reach the purpose that more complicated circuit can reach, and easy care.
Designing requirement: adopt operating handle, finish from starting state and carry out the transition to the operation scheme that running status automaticallyes switch, its advantage adopts equipment few, operating equipment also still is the mains switch operating handle of this motor, the operation secondary circuit is after the present invention improves, have the automatic switching function that carries out the transition to running status from starting state, equal to make the motor switch operating handle to strengthen function of use.And can see at a glance that in operation which platform motor can allow operation, which platform does not allow start-up operation in stoppage in transit.Like this than other establish the operation board system operation get up more convenient, easier grasp, and be not easy to occur misoperation.
To solve the problem of the shared starting drive existence of motor of many different capacities in design, must increase the capacity and the type of cooling of improving starting drive of starting drive, can reach purpose.In addition, when bus loss of pressure, the run switch that necessarily requires each motor of tripping is W
1-W
6, the design protection loop should have low-voltage variation and the upper level switch also drops into low-voltage variation for this reason.
Characteristics according to the shared cover starting drive of multiple electric motors, in start-up operation loop, motor centralized control system (device) lining is corresponding separately, the start-up operation of each motor is in this system, and each personal separately switch handle carries out indivedual start-up operation usefulness, and stopping then is a shared button.This system adopts a shared starting drive in design, a cover timing circuit, a cover warning device and the automatic and semi-automatic startup of cover loop.
Require operating power to adopt isolating transformer output in design, exchanging 380V or 220V is operating power, if when directly using alternating current as operating power, must connect earth leakage protective device can.Like this can be cutting off the power supply in a flash that the attendant gets an electric shock.Also play simultaneously operating power and the effect that electric leakage monitors when operation, occurs.
In sum, be a cover automatically and the motor centralized control system device of semi-automatic and usefulness.
Claims (10)
- Claims:1, a kind of motor centralized control system (device), it is characterized in that finishing the initiating task of multiple electric motors by (cover) starting drive, this system is linked by the input of bus through switch and starting drive, the output of starting drive becomes the startup power supply of each motor, starts the mode that all connects with switch between power supply and motor operation power supply and each motor.
- 2,, it is characterized in that at the same current potential (figure four) of comparing in the input and output two ends of starting drive voltage relay (YJ when two ends record voltage survey three-phase all less than 20 volts by the control system (device) of claim 1 regulation A) action.
- By the control system (device) of claim 1 and 2 regulations, it is characterized in that 3, the motor switch downside inserts the three-phase voltage relay, measure the three-phase voltage value and (make YJ by oneself when above at 340 volts at the motor down-lead upside B) the three-phase voltage actuating of relay.
- 4, control system (device) by claim 1～3 regulation, it is characterized in that having changed motor control switch is that (model is multi-functional change over switch: LWZ-X-1a, 46a, 40,20,6a/F8 or LWZ-Z-1a, 4,6a, 40,20,20/F8) routine operation function and method, promptly operation be taken in operating handle during at closing position 5., 8. contact is connected and is made (figure two ZJ) direct current auxiliary relay send electronic work, starts the loop by this relay contact control and realizes the normal switching of this motor from automatic starting state to running status, and the function of switching this multi-functional change over switch of back is identical with conventional design.
- 5, by the motor centralized control system (device) of right 1～4 regulation, be characterized in that whole start-up system devices adopt the short time duty scheme, after having started a motor, start the loop and be separated from the motor operating loop, for the leave from office electric motor starting is done standby.
- 6, the control system device of stipulating by right 1～5; it is characterized in that and to carry out start-up control to the multiple electric motors of different capacity; control two kinds and two kinds of electric motor startings that power is above; switch with the high or low power motor is corresponding by keeping the protection loop; and increase the capacity of starting drive and improve the type of cooling, can achieve the goal.
- 7, the control system of stipulating by right 1～6 (device), it is characterized in that every motor start-up operation handle and indivedual usefulness that start of button conduct separately, and to stop be that a shared button is operated, and adopts a cover starting drive one cover timing circuit one cover warning device one cover to start the loop automatically.
- 8, control system (device) by right 1-7 regulation, it is characterized in that by the optional a pair of normally-closed contact of each relays of a plurality of relays access operational power source circuit of connecting, and each relay selects a pair of normally opened contact for keeping with the operating power upside that is attempted by the normally-closed contact of not connecting, operational power source circuit through the series connection normally-closed contact inserts by an end that leads to button, the button other end is connected on and is used to keep the loop normally opened contact to connect the loop of this relay coil, go here and there again in the operation circuit one use as stopping by disconnected button, realize that a plurality of electrical appliances only allow the work of 1 (cover) electrical appliance at every turn in the loop, when this electrical appliance work, do not allow the circuit of other electrical appliance work, have only when this electrical appliance stops, can other electrical appliance of single startup.
- 9, the control system of stipulating by right 1-8 (device), it is characterized in that automatic startup, it is motor (its rotating speed is 1-5 rev/min) by an operation circuit control, have a slide on the motor shaft, the relative motion of this moving plate and still dish obtains output contact, the contact is carried out operating sequence by the descending power of motor and is arranged on quiet dish, constitutes automatic start-up operation loop.
- 10, press the control system (device) of the design code of claim 1～9, it is characterized in that in central station of floating dock, monitoring starting current and voltage swing, carry out multiple electric motors and start earlier by heavy-duty motor one by one, the back starts the smaller power motor, realizes the function of semi-automatic and automatic and usefulness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99104554 CN1247410A (en) | 1999-03-30 | 1999-03-30 | Centralized control system for electric motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99104554 CN1247410A (en) | 1999-03-30 | 1999-03-30 | Centralized control system for electric motors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1247410A true CN1247410A (en) | 2000-03-15 |
Family
ID=5271713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99104554 Pending CN1247410A (en) | 1999-03-30 | 1999-03-30 | Centralized control system for electric motors |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1247410A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105737325A (en) * | 2014-12-11 | 2016-07-06 | 中山大洋电机股份有限公司 | Indoor digital centralized control system and applied air conditioner and heating or refrigerating equipment |
-
1999
- 1999-03-30 CN CN 99104554 patent/CN1247410A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105737325A (en) * | 2014-12-11 | 2016-07-06 | 中山大洋电机股份有限公司 | Indoor digital centralized control system and applied air conditioner and heating or refrigerating equipment |
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