CN109365535A - A kind of push-bench rack gear electrical control protection circuit and its guard method - Google Patents
A kind of push-bench rack gear electrical control protection circuit and its guard method Download PDFInfo
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- CN109365535A CN109365535A CN201811383483.2A CN201811383483A CN109365535A CN 109365535 A CN109365535 A CN 109365535A CN 201811383483 A CN201811383483 A CN 201811383483A CN 109365535 A CN109365535 A CN 109365535A
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- 238000005265 energy consumption Methods 0.000 claims description 4
- 238000004886 process control Methods 0.000 claims description 2
- 230000002159 abnormal effect Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
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- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/78—Control of tube rolling
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Abstract
It include energy-dissipating brake circuit, field power supply redundant circuit, PLC system redundant circuit and UPS circuit the invention discloses a kind of push-bench rack gear electrical control protection circuit and guard method, the protection circuit；Push-bench rack gear disclosed by the invention is abnormal the guard method of the protection circuit after power-off and electrical control parking; this method passes through new electrical control thinking; it is out of control after preventing push-bench rack gear from meeting with power-off suddenly during the motion; by perfect backup power source and component Redundancy Design, corresponding scheme is targetedly designed according to the various possibilities of various component damages and power cut-off.The technology can efficiently solve hang-up caused by any reason, the controlled stop that rack gear can be reliable and stable, to achieve the purpose that avoid runaway accident.
Description
Technical field
The invention belongs to technical field of electric control, in particular to a kind of push-bench rack gear electrical control protection circuit and its
Guard method.
Background technique
Push-bench is an important key equipment of seamless steel pipe hot-rolling technique, and process characteristic is: perforation is come out
Hollow billet is locked by necking machine and rod head, then feeds push-bench, hollow billet and plug are passed through push pipe by rack gear pushing tow plug
More than ten of three roller roller dies of bed piece, extruding metal are deformed into the thin-wall tube of suitable wall thickness.
Push-bench transmission structure are as follows: two 2250KW direct current generators by speed reducer connect two gears, gear with greatly
Rack gear engagement, so that dragging rack gear realizes that reciprocal positive and negative rotation campaign, the deceleration of rack gear are stopped and realized completely by motor braking,
Any mechanical brake device is not designed.In the push pipe operation of rolling, two main motors drives weigh about 50 tons of rack gear, will with push rod
Plug and hollow billet promote in the roller die of push pipe lathe bed according to 3 meter per second mill speeds of technique initialization, after the completion of rolling, reversely
Original position is quickly returned to 5 meter per second speed.
Because pushing tow speed is fast, if occurring power failure or other disorderly closedowns suddenly during the rolling process, do not take effectively
Measure quickly stop, will cause 50 tons of the rack gear of weighing necessarily with high speed inertia driving, immeasurable major accident occur.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of push-bench rack gear electrical controls to protect circuit, improves it
It is in the protection circuit includes energy-dissipating brake circuit, field power supply redundant circuit, PLC system redundancy circuit and UPS circuit；
Wherein,
The energy-dissipating brake circuit includes that direct current speeder connect the major loop to be formed with armature, is returned in the master
Road is equipped with fast breaker and bypass；The bypass is in parallel with the direct current speeder；
The field power supply redundant circuit includes multiple field power supplies, and multiple field power supplies are connected again after being connected in parallel to each other
Between the UPS circuit and the energized circuit of the motor；Wherein the energized circuit of the field power supply and the motor it
Between be in series with loss of excitation detection device, whether the field power supply for detecting series connection with it normal；
The PLC system redundant circuit includes multiple PLC control systems of mutual signal connection, multiple PLC controls
System is mutually redundant, the energy-dissipating brake circuit of the PLC control system and push-bench rack gear electrical control protection circuit, institute
Stating field power supply redundant circuit and the UPS circuit has connection；
The UPS circuit includes ups power, the ups power respectively with the field power supply, the PLC control system
Connection, for power when the protection down circuitry.
Further, in above-mentioned push-bench rack gear electrical control protection circuit,
The bypass includes the bypass cock being connected in parallel with direct current speeder and braking resistor.
Further, in above-mentioned push-bench rack gear electrical control protection circuit,
The field power supply redundant circuit includes a field power supply and an auxiliary excitation power supply, the excitation electricity
It connects again with the loss of excitation detection device with after the auxiliary excitation power sources in parallel in source.
Further, in above-mentioned push-bench rack gear electrical control protection circuit,
The PLC system redundant circuit include a PLC system and a spare PLC system, the PLC system and
After the spare PLC system is in parallel again with the direct current speeder, the fast breaker, the bypass cock, described encourage
Magnetoelectricity source redundant circuit is connected.
The present invention also provides a kind of push-bench rack gear electrical controls to protect circuit protection method, it is improved in that should
Protecting circuit is that circuit is protected in the described in any item push-bench rack gear electrical controls of claim 1-4, and the guard method includes:
Dynamic braking Protection Code, auxiliary excitation Protection Code, spare PLC system Protection Code and UPS Protection Code；Wherein,
Dynamic braking Protection Code is used when direct current speeder failure；It is protected when field power supply failure using auxiliary excitation
It defends the doctrine；Spare PLC system Protection Code is used when PLC system failure；When all incoming power failures of the protection circuit
Using UPS Protection Code.
Further, in above-mentioned guard method,
The dynamic braking Protection Code includes the following steps:
Step S11, direct current speeder failure block the thyristor component that armature is adjusted immediately, while sending status word
To PLC control system；
Step S12, the PLC control system detect direct current speeder failure, control bypass cock closure, same to time control
Fast breaker processed is opened；
Step S13, bypass cock closure, connects motor and braking resistor circuit, realizes energy consumption of electrical machinery braking.
Further, in above-mentioned guard method,
The auxiliary excitation Protection Code includes the following steps:
Step S21, loss of excitation detection device detect field power supply failure, send loss of excitation signal to the PLC and control system
System；
Step S22, the PLC control system control cut-in stand-by field power supply, restore motor excitation circuit.
Further, in above-mentioned guard method,
The spare PLC system Protection Code includes the following steps:
Step S31, spare PLC system detect the PLC control system failure, start emergency brake program；
Step S32 starts the emergency brake process control direct current speeder Brake stop, and issues PLC system event
Hinder alarm signal.
Further, in above-mentioned guard method,
The UPS Protection Code includes the following steps:
Step S41, the protection circuit incoming breaker decompression tripping, the ups power starting；
Step S42, the PLC system work normally, and detect that incoming breaker trips, start emergency brake journey immediately
Sequence.
Further, in above-mentioned guard method,
The emergency brake program includes: to connect the bypass cock, and field power supply is converted to auxiliary excitation power supply, described
Motor is stopped in a manner of dynamic braking.
Bring has the beneficial effect that the embodiment of the present invention through the above technical solution:
What protection circuit and electrical control after being abnormal power-off the invention discloses a kind of push-bench rack gear stopped
Protection circuit and its guard method, this method prevent push-bench rack gear from meeting with during the motion by new electrical control thinking
It is out of control after meeting power-off suddenly, by perfect backup power source and component Redundancy Design, according to various component damages and electricity
The various possibilities of source power-off targetedly design corresponding scheme.The technology can efficiently solve unexpected caused by any reason
It shuts down, the controlled stop that rack gear can be reliable and stable, to achieve the purpose that avoid runaway accident.
Detailed description of the invention
Fig. 1 is push-bench rack gear electrical protection circuit structural schematic diagram provided in an embodiment of the present invention.
Figure description of symbols:
1- transformer；2- incoming breaker；3- direct current speeder；4- fast breaker；5- braking resistor；6- bypass
Switch；7-PLC control system；The spare PLC system of 8-；9-UPS power supply；K1- field power supply；K2- auxiliary excitation power supply；K3- loses
Magnetic detection device；M- armature.10- incoming power；11- energy-dissipating brake circuit；12-PLC system redundancy circuit；13- excitation
Power supply redundancy circuit；14-UPS circuit.
Specific embodiment
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.The explanation of each example through the invention
Mode, which provides, to be not intended to limit the present invention.In fact, those skilled in the art will be clear that, the scope of the present invention or essence are not being departed from
In the case where mind, it can modify in the present invention and modification.For example, being illustrated or described as the spy of a part of one embodiment
Sign can be used for another embodiment, to generate another embodiment.Thus, it may be desirable to which the present invention includes to be included into appended power
Such modifications and variations in the range of benefit requirement and its equivalent.
In the description of the present invention, term " longitudinal direction ", " transverse direction ", "upper", "lower", "front", "rear", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the present invention rather than require the present invention that must be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.Term used in the present invention " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected,
It may be a detachable connection；It can be directly connected, can also be indirectly connected by intermediate member, for the common of this field
For technical staff, the concrete meaning of above-mentioned term can be understood as the case may be.
It is an object of the invention to how provide a kind of push-bench rack gear electrical equipment control protection circuit, make it in fortuitous event
Lower realization fast braking, prevents the generation of substantial equipment and personal safety accident, the motor drag tooth similar applied to push-bench
Item moves back and forth and the electrical control without mechanical braking equipment.
Because push-bench technique requires acceleration high, and breaks down and must also be able to achieve ramp to stop when shutting down, pass through
Technical performance is to when comprehensively considering, two direct current generators of main motor final choice of the present invention.The mode of braking of direct current generator has
Three kinds: dynamic braking, reversing braking, regenerative braking.When direct current speeder failure, motor is to be in free parking state,
It is uncontrolled with the great accident of high speed inertia generation to will cause rack gear, how to realize the braking of motor and uses which kind of mode of braking
It properly, is the problem of must being faced when the application designs.But no matter which kind of mode of braking, how to guarantee the excitation of direct current generator
Voltage exists, and there are also the control power supplys for how guaranteeing all kinds of executive components of mode of braking switching when occurring abnormal normally may be used
It leans on, is problem to be solved of the present invention.
Because in real work, causing push-bench abnormal power-down to have a variety of possibilities, therefore the application passes through to existing electricity
Road carries out Redundancy Design, provides a kind of meaning that rack gear can be avoided in the case where any one contingency leads to power blackout situation
Outer runaway accident occurs.
As shown in Figure 1, for a kind of push-bench rack gear electrical equipment control protection circuit provided by the invention.Wherein, dynamic braking
Circuit 11；PLC (Programmable Logic Controller, programmable logic controller (PLC)) system redundancy circuit 12；It encourages
Magnetoelectricity source redundant circuit 13；UPS(Uninterruptible Power System/Uninterruptible Power
Supply, i.e. uninterruptible power supply) circuit 14.Direct current generator can be decomposed into armature and excitation two parts, energy-dissipating brake circuit 11
Connection is armature part, and what field power supply redundant circuit 13 connected is motor excitation part.Push-bench rack gear motor is wanted
Parking after realizing accident power-off, it is necessary to assure armature circuit is normal and field power supply reliable power supply, the acting body of ups power
Guarantee the non-interruptible supply of field power supply now；And PLC system is then that each component controlled in these circuits is wanted according to design
The logic asked is acted.
Energy-dissipating brake circuit 11 as shown in Figure 1 is mainly used for starting when direct current speeder 3 breaks down.Energy consumption
Braking circuit 11 connect the major loop to be formed with motor M including direct current speeder 3, and quicking break on major loop
Device 4 and bypass.Bypass is connected to the both ends of armature M, in parallel with armature M.Bypass includes the bypass being connected in series
Switch 6 and braking resistor 5.When direct current speeder 3 breaks down, the bypass of energy-dissipating brake circuit 11 is connected, i.e., quickly
Breaker 4 disconnects, and bypass cock 6 is closed, and armature M and bypass cock 6 and braking resistor 5 form the circuit of closure at this time,
The energy of armature M rapidly depletes in braking resistor 5, to realize the purpose of Brake stop.
It is as shown in Figure 1 field power supply redundant circuit 13, after which is used for armature M loss of excitation, fast quick-recovery
Motor excitation system avoids the power-off of armature M loss of excitation from leading to contingency.
Field power supply redundant circuit 13 includes field power supply K1, and auxiliary excitation power supply K2 is series at motor after being connected in parallel to each other again
The energized circuit of armature M.Wherein consecutive is associated with excitation detection device K3 on field power supply K1, for detecting the excitation of series connection with it
Power supply K1 excitation.Further, field power supply redundant circuit 13 includes an a field power supply K1 and auxiliary excitation power supply K2,
Field power supply K1 is in parallel with auxiliary excitation power supply K2 again after connecting with excitation detection device K3.In other embodiments, excitation electricity
Source K1 or auxiliary excitation power supply K2 may have more, need to be determined according to actual condition, and the application does not do unified limit to this
It is fixed.
It is as shown in Figure 1 PLC system redundant circuit 12, which cancel closedown occurs for PLC control system 7
Shi Qidong.PLC system redundant circuit 12 includes the multiple PLC systems for being mutually redundant connection.Push-bench rack gear electrical protection circuit
In all component state and execute coil and be all connected with into PLC system.Preferably, PLC system redundant circuit in the present embodiment
12 include a PLC control system 7 and a spare PLC system 8, the component shape of all push-bench rack gear electrical protection circuits
State and execution coil are all connected with into PLC system.In other embodiments, PLC system 7 or spare PLC system 8 may have more
It is a, it needs to be determined according to actual condition, the application does not do this unified restriction.
It is as shown in Figure 1 UPS circuit 14, which enables in the case where having a power failure suddenly for all incoming powers.
UPS circuit 14 includes ups power, and ups power is with field power supply K1, auxiliary excitation power supply K2, PLC control respectively
System 7 and spare PLC system 8 connect, for powering when down circuitry to protect.
Based on above-mentioned protection circuit, present invention also provides a kind of push-bench rack gear electrical controls to protect circuit protection side
Method, the guard method are to protect circuit according to above-mentioned push-bench rack gear electrical equipment control, and determining guard method specifically includes:
Dynamic braking Protection Code, auxiliary excitation Protection Code, spare PLC system Protection Code and UPS Protection Code.
Dynamic braking Protection Code is used when direct current speeder failure；Auxiliary excitation is used when field power supply failure
Protection Code；Spare PLC system Protection Code is used when PLC system failure；When all incoming power failures of the protection circuit
Shi Caiyong UPS Protection Code.
Wherein, dynamic braking Protection Code includes the following steps:
Step S11,3 failure of direct current speeder block the thyristor component that armature is adjusted immediately, while sending status word
To PLC control system 7；
Step S12, PLC control system 7 detect 3 failure of direct current speeder, and control bypass cock 6 is closed, same to time control
Fast breaker 4 processed is opened；
Step S13, bypass cock closure, connects motor and braking resistor circuit, realizes energy consumption of electrical machinery braking.
Wherein, auxiliary excitation Protection Code includes the following steps:
Step S21, loss of excitation detection device K3 detect field power supply K1 failure, send loss of excitation signal to PLC control system
7；
Step S22, PLC control system 7 control cut-in stand-by field power supply K1, restore motor excitation circuit.
Wherein, spare 8 Protection Code of PLC system includes the following steps:
Step S31, spare PLC system 8 detect 7 failure of PLC control system, start emergency brake program；
Step S32 starts emergency brake program controlled carriage Brake stop, and issues 7 failure report of PLC control system
Alert signal.
Wherein, UPS Protection Code includes the following steps:
Step S41, protection circuit incoming breaker decompression tripping, ups power starting；
Step S42, PLC system work normally, and detect that incoming breaker trips, start emergency brake program immediately.
Incoming breaker in above-mentioned steps S41 refers to the subsequent low pressure incoming breaker of transformer.
Further, above-mentioned emergency brake program includes: to connect bypass cock 6, and field power supply K1 is converted to spare and encouraged
Magnetoelectricity source K2, armature M are stopped in a manner of dynamic braking.
Below by way of specific embodiment, the present invention is described in detail, but the present invention is not limited thereto.
Embodiment 1
Device carries out speed when operating normally, by Siemens's 6RA70 speed regulation device, the various closed loops of electric current adjust control
System.When speed regulation device failure, all silicon controlled components of armature adjusting are necessarily had turned off, therefore, are designed in armature circuit
One bypass cock, the bypass cock 6 connect with braking resistor after again with motor parallel, the energy of motor can be allowed by connecting bypass cock
Amount rapidly depletes in braking resistor, and then realizes the purpose of Brake stop.The specific method is as follows:
When direct current speeder 3 breaks down, the thyristor component that armature is adjusted is blocked immediately, while sending status word
When detecting 3 failure of direct current speeder to PLC, PLC, start the bypass cock 6 of armature circuit, connects armature M and system
The circuit of dynamic resistance 5, realizes the dynamic braking of armature M.
Using 100 above-mentioned exceptions of this method coprocessing, it can reliably realize, reach standard requirements, meeting equipment makes
Use performance.
Embodiment 2
The specific method is as follows for fast quick-recovery after motor loss of excitation:
When excitation measure loop detects field power supply K1 loss of excitation, excitation detection device K3 gives PLC to send loss of excitation signal,
The contactor of auxiliary excitation power supply K2 is closed by 7 horse back of PLC control system, puts into auxiliary excitation power supply, and then is restored motor and encouraged
Magnetic system.Motor excitation system continues to run, and direct current generator forms reliable magnetic field, controls armature by direct current speeder 3
Loop current direction and size, the final brake application stoping for realizing motor.
It tests 80 above situations altogether using this method, can guarantee the normal of input/output signal, realize motor
Brake application stoping.
Embodiment 3
The PLC device that transmission cabinet individually controls, disposition when occurring abnormal.The specific method is as follows:
Two independent PLC systems have mutually the normal interlocking signal of detection device, when the PLC of normal use controls system
When cancel closedown occurs in system 7, after spare PLC system 8 detects signal, start emergency control procedure, direct current speeder 3 at once
Implement reversing braking to stop to motor braking, and provides " PLC system exception " alarm signal.
It tests 70 above situations altogether using this method, can guarantee that the normal of interlocking signal, emergence program can be normal
It comes into operation, it is preferential to have achieved the purpose that motor braking is shut down.
Embodiment 4
There is a situation where transmission all incoming powers of cabinet to have a power failure suddenly, and the specific method is as follows:
Armature main circuit power has a power failure, and incoming breaker decompression tripping, the UPS of 40KVA capacity guarantees control power supply
Normal survival, PLC system works normally, detect that incoming breaker trips, PLC system starts emergency stop program immediately:
I.e. the bypass cock 6 of armature circuit is connected, and excitation switches to auxiliary excitation power supply K2, and motor is stopped in a manner of dynamic braking.
The above method by repeatedly test, each protection circuit and its guard method can Guarantee control system just
Often operation, emergence program can normally come into operation, so that it is preferential to have achieved the purpose that motor braking is shut down.
As known by the technical knowledge, the present invention can pass through the embodiment party of other essence without departing from its spirit or essential feature
Case is realized.Therefore, embodiment disclosed above, in all respects are merely illustrative, not the only.Institute
Have within the scope of the present invention or is included in the invention in the change being equal in the scope of the present invention.
Claims (10)
1. circuit is protected in a kind of push-bench rack gear electrical control, which is characterized in that the protection circuit includes energy-dissipating brake circuit, encourages
Magnetoelectricity source redundant circuit, PLC system redundant circuit and UPS circuit；Wherein,
The energy-dissipating brake circuit includes that direct current speeder connect the major loop to be formed with armature, on the major loop
Equipped with fast breaker and bypass；The bypass is in parallel with the direct current speeder；
The field power supply redundant circuit includes multiple field power supplies, and multiple field power supplies are series at institute after being connected in parallel to each other again
It states between UPS circuit and the energized circuit of the motor；Wherein gone here and there between the field power supply and the energized circuit of the motor
It is associated with loss of excitation detection device, whether the field power supply for detecting series connection with it is normal；
The PLC system redundant circuit includes multiple PLC control systems of mutual signal connection, multiple PLC control systems
It is mutually redundant, the energy-dissipating brake circuit of the PLC control system and push-bench rack gear electrical control protection circuit described is encouraged
Magnetoelectricity source redundant circuit and the UPS circuit have connection；
The UPS circuit includes ups power, and the ups power is connect with the field power supply, the PLC control system respectively,
For to power when the protection down circuitry.
2. circuit is protected in push-bench rack gear electrical control according to claim 1, which is characterized in that
The bypass includes the bypass cock being connected in parallel with direct current speeder and braking resistor.
3. circuit is protected in push-bench rack gear electrical control according to claim 1, which is characterized in that
The field power supply redundant circuit include a field power supply and an auxiliary excitation power supply, the field power supply with
It connects again with the loss of excitation detection device after the auxiliary excitation power sources in parallel.
4. circuit is protected in push-bench rack gear electrical control according to claim 1, which is characterized in that
The PLC system redundant circuit includes a PLC system and a spare PLC system, the PLC system and described
It is electric with the direct current speeder, the fast breaker, the bypass cock, the excitation again after spare PLC system is in parallel
Source redundant circuit is connected.
5. circuit protection method is protected in a kind of push-bench rack gear electrical control, which is characterized in that the protection circuit is claim
Circuits are protected in the described in any item push-bench rack gear electrical controls of 1-4, and the guard method includes: dynamic braking Protection Code, standby
With excitation protection method, spare PLC system Protection Code and UPS Protection Code；Wherein,
Dynamic braking Protection Code is used when direct current speeder failure；It is protected when field power supply failure using auxiliary excitation
Method；Spare PLC system Protection Code is used when PLC system failure；It is adopted when all incoming power failures of the protection circuit
With UPS Protection Code.
6. circuit protection method is protected in push-bench rack gear electrical control according to claim 5, which is characterized in that
The dynamic braking Protection Code includes the following steps:
Step S11, direct current speeder failure block the thyristor component that armature is adjusted immediately, while sending status word to PLC
Control system；
Step S12, the PLC control system detects direct current speeder failure, control bypass cock closure, while controlling fast
Fast breaker is opened；
Step S13, bypass cock closure, connects motor and braking resistor circuit, realizes energy consumption of electrical machinery braking.
7. circuit protection method is protected in push-bench rack gear electrical control according to claim 5, which is characterized in that
The auxiliary excitation Protection Code includes the following steps:
Step S21, loss of excitation detection device detect field power supply failure, send loss of excitation signal to the PLC control system；
Step S22, the PLC control system control cut-in stand-by field power supply, restore motor excitation circuit.
8. circuit protection method is protected in push-bench rack gear electrical control according to claim 5, which is characterized in that
The spare PLC system Protection Code includes the following steps:
Step S31, spare PLC system detect the PLC control system failure, start emergency brake program；
Step S32 starts the emergency brake process control direct current speeder Brake stop, and issues PLC system failure report
Alert signal.
9. circuit protection method is protected in push-bench rack gear electrical control according to claim 5, which is characterized in that
The UPS Protection Code includes the following steps:
Step S41, the protection circuit incoming breaker decompression tripping, the ups power starting；
Step S42, the PLC system work normally, and detect that incoming breaker trips, start emergency brake program immediately.
10. protecting circuit protection method according to the described in any item push-bench rack gear electrical controls of claim 8-9, feature exists
In,
The emergency brake program includes: to connect the bypass cock, and field power supply is converted to auxiliary excitation power supply, the motor
It is stopped in a manner of dynamic braking.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811383483.2A CN109365535B (en) | 2018-11-20 | 2018-11-20 | Electrical control protection circuit and protection method for rack of push bench |
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| CN201811383483.2A CN109365535B (en) | 2018-11-20 | 2018-11-20 | Electrical control protection circuit and protection method for rack of push bench |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111130055A (en) * | 2020-02-21 | 2020-05-08 | 绍兴图雅电子科技有限公司 | Emergency circuit protection device with standby power supply |
| CN111669078A (en) * | 2020-06-03 | 2020-09-15 | 奇宏电子(深圳)有限公司 | Fan brake circuit of active standby power supply |
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