CN102176131B - Switching device driven by stepping motor - Google Patents
Switching device driven by stepping motor Download PDFInfo
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- CN102176131B CN102176131B CN 201110045959 CN201110045959A CN102176131B CN 102176131 B CN102176131 B CN 102176131B CN 201110045959 CN201110045959 CN 201110045959 CN 201110045959 A CN201110045959 A CN 201110045959A CN 102176131 B CN102176131 B CN 102176131B
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Abstract
The invention discloses a switching device for driving a stepping motor of a reactor power regulating system. The apparatus includes a logic control section and a switching control section. The logic control part comprises an arbitration logic circuit PLC A and a PLC B, and a Central Processing Unit (CPU), a digital quantity output module DO, a digital quantity input module DI and a motion control module CFY are respectively arranged in the arbitration logic circuit PLC A and the arbitration logic circuit PLC B. The switching control part comprises a switching control arbitration logic circuit, a switching circuit, a connector A, a connector B and a connector C. The switching device judges whether the PLC works normally or not according to the pulse signals sent by the PLC A and the PLC B, and the PLC is connected with the stepping motor driver by receiving the pulse signal of which PLC. The switching device has simple structure, safety and reliability, and can ensure the safe and stable operation of the power regulating system.
Description
Technical field
The invention belongs to reactor control technology field, be specifically related to a kind of stepper motor driven switching device shifter for reactor power regulating system.
Background technology
Power regulating system is the important instrument control system of reactor.In order to ensure reactor safety, reliability service, power regulating system arranges A, the PLC control station of B two-way redundancy, and operation is hot standby each other simultaneously.During work, A, B two-way PLC control station receive all input signals simultaneously, adopt the voltage signal deconcentrator to process to analog signals, and the switching value signal of passive contact form is processed by auxiliary reclay; The control output signal of system also needs to process, and can contact or parallel processing with relay to its switching value control signal of sending.Control rod drive mechanisms (CRD) is stepper motor driven electromagnetic actuator device, and the major control object is stepper motor, during power regulating system control step motor movement, sends gating pulse, control step motor positive and inverse to stepper motor driver.Stepper motor of every shim rod configuration.The PLC control station of A, B two-way redundancy moves control program simultaneously, is that stepper motor sends gating pulse to same control object.Because stepper motor can only receive one tunnel control signal, so, the two path control signal that A, B two passages send must be switched by switching device shifter, guarantee when power regulating system is normal, stepper motor receives only the control wave of a certain passage PLC, when a certain passage breaks down, then switch automatically switches to the normal passage in another road.Simultaneously, because the step motor control signal adopts the differential signal mode to transmit, transmission speed is fast, easily be subject to external interference, the signal transmission must be adopted special-purpose interface circuit, therefore, need to there be the good switching device shifter of a cover reliability to realize the stepper motor driven quick unperturbed handoff functionality of regulating system.
At present, document is not yet reported correlation technique.
Summary of the invention
(1) goal of the invention
The present invention aims to provide the stepper motor driven switching device shifter of reactor power regulating system a kind of simple in structure, safe and reliable.
(2) technical scheme
For achieving the above object, the invention provides following technical scheme.
The stepper motor driven switching device shifter of a kind of reactor power regulating system comprises logic control part and switching control part.Logic control partly comprises arbitraling logic circuit PLC A and PLC B, and CPU module CPU, digital output module DO, digital quantity input module DI, motion-control module CFY are set respectively among arbitraling logic circuit PLCA and the PLC B.Switching control part comprises switching controls arbitraling logic circuit, commutation circuit, connector A, connector B, connector C.
Wherein the input end of switching controls arbitraling logic circuit connects respectively the DO module of PLC A and PLC B, output terminal connects respectively the DI module of PLC A and PLC B, accept respectively the heartbeat signal of PLC A, PLC B output, show self normal operation, and to PLC A and PLC B feedback states signal, i.e. " signal of where organizing PLC is the output signal of switching device shifter " and " switching device shifter running status " signal.When PLC A or PLCB duty are all normal, provide cyclic pulse signal by the DO module to the switching controls arbitraling logic circuit, if PLC A or PLC B fault, then pulse output will stop.
The input end of connector A, B connects respectively the CFY module of PLC A and PLC B, receives the pulse output signals that the CFY module is sent.
The input end of commutation circuit is the output terminal of receiving connector A, connector B, switching controls arbitraling logic circuit respectively, and its output signal sends connector C to.
Connector C links to each other with the signal port of stepper motor driver, and sends the driving instruction to stepper motor driver.
As a kind of prioritization scheme, this switching device shifter also is provided with PLC A or the PLC B passage change-over switch under the manual state, this switching signal access switching controls arbitraling logic circuit, after the switching controls arbitraling logic circuit receives this switching signal, which road PLC input judgement is, equally by commutation circuit the CFY module output signal of this PLC is transferred to connector C, connect with stepper motor driver, realize the contact of manual control PLC and stepper motor.
(3) invention effect
The switching device shifter that the technical program provides receives respectively the pulse output of the CFY module on the two cover PLC; To signals such as two cover PLC feedback switching device running statuses; And accept the heartbeat signal of A, B two cover PLC outputs.When switching device shifter works in the automatic operation mode, switching device shifter judges according to the pulse signal that PLC A and PLC B send here whether it is working properly, receives first the pulse signal of which PLC, it is main just establishing which PLC, and this PLC and stepper motor driver are connected.In case switching device shifter is not received the pulse signal that comes autonomous PLC in its failure diagnosis time T, switching device shifter is thought its fault, with tangential another road PLC of switch.If two-way PLC breaks down, the switching device shifter attitude of remaining stationary.When switching device shifter is in the manual work mode, can force to select PLC A or PLC B to devote oneself to work.This switching device shifter is simple in structure, and is safe and reliable, can guarantee power regulating system safety, stable operation.
Description of drawings
Fig. 1: switching device shifter principle of work block diagram.
Embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is further elaborated.
As shown in Figure 1, the stepper motor driven switching device shifter of a kind of reactor power regulating system, steering logic is finished by PLC, and PLC hardware is made of CPU module CPU, digital quantity input module DI, digital output module DO and motion-control module CFY etc.Switching device shifter receives the output of CFY among A row and the B row PLC, determines the signal of which row of output according to the PLC working state signal, namely the input signal from A, B two row is carried out " two get one " and selects operation.
Switching control part comprises that switching controls arbitraling logic circuit, commutation circuit, connector A, connector B, connector C etc. partly form, wherein connector A is connected with connector B with the CFY modules of two row on the PLC and is connected, connector C is the delivery outlet of switching device shifter, links to each other with stepper motor driver.
When PLC A or PLC B normal operation, periodically export the pulse heartbeat signal by its DO module to the control arbitraling logic circuit of switching device shifter, be in normal operating conditions to show this PLC.If the PLC fault, heartbeat signal will stop.The switching controls arbitraling logic circuit judges according to the pulse signal that PLC A and PLC B send here whether it is working properly, receives first the pulse signal of which PLC, and it is main just establishing which PLC.The output of connector A and connector B all accesses commutation circuit, by commutation circuit the CFY module output signal of main PLC is transferred to connector C, connect with stepper motor driver, and with the CFY module output signal shielding of another PLC.In case the switching controls arbitraling logic circuit is not received the pulse signal that comes autonomous PLC in its failure diagnosis time T, then think its fault, by the CFY module output of tangential another road PLC of commutation circuit.If two-way PLC breaks down, the switching device shifter attitude of remaining stationary.During normal operation, the switching controls arbitraling logic circuit passes through the DI module of PLC A or PLC B to PLC feedback states signal, i.e. " signal that where is listed as PLC is the output signal of switching device shifter " and " whether switching device shifter moves " signal.
As a kind of prioritization scheme, this switching device shifter also arranges PLC A, the PLC B passage switching push button under the manual state.Switching push button directly links to each other with the switching controls arbitraling logic circuit, when switching device shifter stops automatic switching function, changes into when accepting manual control, by PLC A, PLC B passage switching push button artificial selection passage.
Switching device shifter adopts the large-scale customization design of electronic circuits,, diagnoses fault that the transmitted signal occurs, stops from main work PLC and begins to finish the required time to switching and be controlled in the 1S as clock source with crystal oscillator.
The technical program has realized that power adjustments exports quick unperturbed handoff functionality on the basis of satisfy regulatory safety requirements.
Obviously those skilled in the art can carry out various modifications and variations and not break away from the spirit and scope of the present invention the present invention.Like this, if of the present invention these revise and modification belongs in the scope of its equivalent technologies of claim of the present invention, then the present invention also is intended to comprise these modifications and modification.
Claims (2)
1. a stepper motor driven switching device shifter comprises logic control part and switching control part; Logic control partly comprises arbitraling logic circuit PLC A and PLC B, and CPU module CPU, digital output module DO, digital quantity input module DI, motion-control module CFY are set respectively among arbitraling logic circuit PLC A and the PLC B; Switching control part comprises switching controls arbitraling logic circuit, commutation circuit, connector A, connector B, connector C;
Wherein the input end of switching controls arbitraling logic circuit connects respectively the DO module of PLC A and PLC B, output terminal connects respectively the DI module of PLC A and PLC B, accept respectively the heartbeat signal of PLC A, PLC B output, and to PLC A and PLC B feedback states signal;
The input end of connector A, B connects respectively the CFY module of PLC A and PLC B, receives the pulse output signals that the CFY module is sent;
Commutation circuit connects respectively connector A, connector B, switching controls arbitraling logic circuit, the output signal of receiving connector A, connector B, switching controls arbitraling logic circuit; The output signal of commutation circuit sends connector C to;
Connector C links to each other with the signal port of stepper motor driver, and sends the driving instruction to stepper motor driver.
2. stepper motor driven switching device shifter according to claim 1, it is characterized in that: described switching device shifter also is provided with PLC A or the PLC B passage change-over switch under the manual state, this switching signal access switching controls arbitraling logic circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110045959 CN102176131B (en) | 2011-02-25 | 2011-02-25 | Switching device driven by stepping motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110045959 CN102176131B (en) | 2011-02-25 | 2011-02-25 | Switching device driven by stepping motor |
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| Publication Number | Publication Date |
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| CN102176131A CN102176131A (en) | 2011-09-07 |
| CN102176131B true CN102176131B (en) | 2013-04-17 |
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| CN 201110045959 Active CN102176131B (en) | 2011-02-25 | 2011-02-25 | Switching device driven by stepping motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931900A (en) * | 2012-11-16 | 2013-02-13 | 上海宇航系统工程研究所 | High-reliability driving controller for two-phase stepping motor |
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| CN102176131A (en) | 2011-09-07 |
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