CN101561664B - Method for controlling combined type double-control and double-purpose single-backup system and controller thereof - Google Patents
Method for controlling combined type double-control and double-purpose single-backup system and controller thereof Download PDFInfo
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- CN101561664B CN101561664B CN2008100495329A CN200810049532A CN101561664B CN 101561664 B CN101561664 B CN 101561664B CN 2008100495329 A CN2008100495329 A CN 2008100495329A CN 200810049532 A CN200810049532 A CN 200810049532A CN 101561664 B CN101561664 B CN 101561664B
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Abstract
The invention discloses a method for controlling a combined type double-control and double-operation single-standby system, which combines a controller VF1 and a controller VF2 through a main loop and acontrol loop so as to control the double-operation and single-standby state of three control objects (M1-M3) and ensure that the three control objects have three following operation-standby states: (1) the M1 and the M2 are operated and the M3 is used for standby; (2) the M1 and the M3 are operated and the M2 is used for standby; and (3) the M2 and the M3 are operated and the M1 is used for standby. A controller mainly consists of a main loop and a control circuit, wherein the main loop is provided with two combined type controllers VF1 and VF2; the output of the VF1 is respectively connected with the control object M1 through a main contact of an AC contactor KM1 and the control object M3 through a main contact of an AC contactor KM13; and the output of the VF2 is respectively connected with the control object M2 through a main contact of an AC contactor KM2 and the control object M3 through a main contact of an AC contactor KM23, thus the main loop deploys the controllers to the control objects in an operation state so as to furthest reduce the number and the capacity of the controllers and reduce the investment cost of the hardware of the controllers.
Description
Technical field
The invention belongs to technical field of electrical automatic control, what mainly propose is that a kind of combined two controls---dual-purpose one is equipped with system control method and controller.
Background technology
In technical field of electrical automatic control, the widespread use of general industrial controller such as AC converter, soft initiator etc. has reached the critical role of not replacing now.The normal several working methods that are equipped with of several usefulness that adopt of equipment in Industry Control, it is modal mode that dual-purpose one is equipped with system.Controller also is traditional rule with Power Groud coupling (1: 1 coupling) in controlling object (controlled plant).For example make a dual-purpose one of forming by 3 160KW motors and be equipped with the AC frequency conversion control system, by 2 kinds nothing more than of prior art schemes: the one controller selects for use the frequency converter of 3 same power (160KW) respectively 3 160KW pump motors to be implemented control, and the control system as 1/3 is in idle stand-by state; It two is respectively 2 160KW motors to be implemented one drag twos control with 12 times power (320KW) frequency converter, uses 1 same power (160KW) frequency converter respectively 1 160KW pump motor to be implemented control again.The thinking core of above scheme is that the power of controller and controlling object is 1: 1 coupling, in last routine system no matter whether controlling object is in the investment of stand-by state at hardware and all will disposes frequency-variable controller (capacity) for it, be that frequency-variable controller (capacity) is not according to the operate as normal equipment disposition but according to work and the configuration of standby equipment total amount, thereby cause certain idle waste the in the controller hardware investment.
Summary of the invention
Purpose of the present invention promptly is to propose a kind of combined two control-dual-purposes one to be equipped with system control method and controller.Make it in running order controlling object Configuration Control Unit, be used for the equipment of work, realize work-stand-by state control of combination in any with minimum controller.Thereby reduce the quantity and the capacity of controller to greatest extent, reduce the controller hardware cost of investment.
The present invention realizes that the technical scheme that said method is taked is: (VF1, VF2 combine, and realize the dual-purpose one of 3 controlling object M1-M3 is equipped with the control of state with 2 controllers by major loop and control loop.
Controller of the present invention is made up of major loop and control circuit, and major loop is provided with 2 controller VF1 and VF2, and the output of VF1 connects the main contacts connection controlling object M3 of controlling object M1, process A.C. contactor KM13 respectively through the main contacts of A.C. contactor KM1; The output of VF2 connects the main contacts connection controlling object M3 of controlling object M2, process A.C. contactor KM23 respectively through the main contacts of A.C. contactor KM2.
The present invention is intended to only give in running order controlling object Configuration Control Unit, is used for the controlling object of work at present state with minimum controller.In mainly being applicable to, miniwatt dual-purpose one is equipped with the control occasion of system, by major loop and control loop 2 controller VF1 and VF2 combined, realize 3 controlling object (M1-M3) are arbitrarily made with the control that dual-purpose one is equipped with state.Its middle controller VF1 and VF2 are general industrial controller (as AC converter, soft initiator etc.); Controlling object is equipment such as motor.VF1, VF2 combine with 2 controllers (for example 2 AC converter), realize the dual-purpose one of 3 controlling object (for example 3 motors) M1-M3 is equipped with the control of state.VF1 and VF2 own same controlling object M3 together, under the logic control of control circuit, realize the chain interlocking of steering logic between two VF1 and the VF2.Make it have three kinds of work assembled state switching controls: (1) 1-2 combination: M1 (VF1 control) and M2 (VF2 control) duty, M3 standby (breaking away from VF1 and VF2); (2) 1-3 combination: M1 (VF1 control) and M3 (VF2 control) duty, M2 standby (breaking away from VF2); (3) 2-3 combination: M2 (VF2 control) and M3 (VF1 control) duty, M1 standby (breaking away from VF1).Realized the work-stand-by state control of combination in any.Each equipment all might become work and standby two states, and any 2 equipment only just can be enjoyed controller when work, break away from controller when being in stand-by state.Native system also possesses the function that the using and the reserved, dual-purpose two are equipped with; Achieve with of the various work-stand-by state control of N controller by the configuration combination N+1 above controlling object.Thereby reduce the quantity and the capacity of controller to greatest extent, stop the idle and waste of controller.The present invention has the outstanding feature that reduces the controller hardware cost of investment to greatest extent.
Description of drawings
Accompanying drawing is circuit theory diagrams of the present invention.
Embodiment
In conjunction with the accompanying drawings, it is as follows to provide present embodiment:
Present embodiment dual-purpose one is equipped with system controller and is made up of major loop and control circuit, and major loop is provided with 2 controllers and is: frequency-variable controller VF1 and VF2; 3 controlling object are: M1 (motor 1), M2 (motor 2) and M3 (motor 3).By major loop and control loop 2 controller VF1 and VF2 are combined, realize 3 controlling object (M1-M3) are arbitrarily made with the control that dual-purpose one is equipped with state.The fixedly controlling object of VF1 is M1 (motor 1), and the fixedly controlling object of VF2 is M2 (motor 2), and VF1 and VF2 own same controlling object M3 (motor 3) together.Because VF1 and VF2 and the same power of controlling object promptly can only be controlled 1 same power motor separately at every turn.When VF1 switched to controlling object M3 by controlling object M1, do not allow VF2 to switch to controlling object M3 by controlling object M2 this moment.In like manner, when VF2 switches to controlling object M3 by controlling object M2, do not allow VF1 to switch to controlling object M3 by controlling object M1.Above interlocking switching controls is three closing of contact on positions by control handle SA, realizes three kinds of work-stand-by state switching controls:
During the SA-12 closing of contact, realize the 1-2 combination: M1 (VF1 control) and M2 (VF2 control) duty, M3 standby (breaking away from VF1 and VF2);
During the SA-13 closing of contact, realize the 1-3 combination: M1 (VF1 control) and M3 (VF2 control) duty, M2 standby (breaking away from VF2);
During the SA-23 closing of contact, realize the 2-3 combination: M2 (VF2 control) and M3 (VF1 control) duty, M1 standby (breaking away from VF1).
As shown in Figure 1, the main electrical part of its major loop has: VF1, VF2---frequency-variable controller; The startup A.C. contactor of KM10---VF1, the startup A.C. contactor of KM20---VF2; M1, M2, M3---motor 1, motor 2, motor 3 (controlling object); KM1---A.C. contactor main contacts (driving the M1 converting operation) through VF1, KM01---A.C. contactor main contacts (M1 power frequency operation); KM2---A.C. contactor main contacts (driving the M2 converting operation) through VF2, KM02---A.C. contactor main contacts (M2 power frequency operation); KM13---A.C. contactor main contacts (driving the M3 converting operation) through VF1, KM23---A.C. contactor main contacts (driving the M3 converting operation), KM03---A.C. contactor main contacts (M3 power frequency operation) through VF2.In major loop, the input end of VF1 is connected to the main contacts that starts A.C. contactor KM10, and the output of VF1 connects the main contacts connection controlling object M3 of controlling object M1, process A.C. contactor KM13 respectively through the main contacts of A.C. contactor KM1; The input end of frequency converter VF2 is connected to the main contacts that starts A.C. contactor KM20, and the output of VF2 connects the main contacts connection controlling object M3 of controlling object M2, process A.C. contactor KM23 respectively through the main contacts of A.C. contactor KM2; Also be provided with the power frequency operation loop in major loop: the power frequency operation loop of motor M 1 is to realize by the main contacts of A.C. contactor KM01, the power frequency operation loop of motor M 2 is to realize by the main contacts of A.C. contactor KM02, and the power frequency operation loop of motor M 3 is to realize by the main contacts of A.C. contactor KM03.Main components and parts in its control circuit have: SA---and (make-position of 3 groups of contacts: SA-12 is the 1-2 combination to three assembled state switching controls knobs; SA-13 is the 1-3 combination; SA-23 is the 2-3 combination), SA-12 passes through auxiliary reclay KA13 output, SA-23 by auxiliary reclay KA23 output by auxiliary reclay KA12 output, SA-13; KM1---A.C. contactor (VF1 drives the M1 converting operation), KM01---A.C. contactor (M1 power frequency operation); KM2---A.C. contactor (VF2 drives the M2 converting operation), KM02---A.C. contactor (M2 power frequency operation); KM13---A.C. contactor (VF1 drives the M3 converting operation), KM23---A.C. contactor (VF2 drives the M3 converting operation), KM03---A.C. contactor (M3 power frequency operation).In control circuit, mainly be provided with four and switch the interlocking link:
(1) the switching interlocking link of M1 and M3 during the converting operation under VF1 drives: with the normally opened contact of the normally opened contact of KA12 and KA13 and be unified into " or " logical relation is connected to the control coil loop of KM1, the pacing items of moving as M1; Add in the control coil loop of KM1 KM10 (VF1 driving) normally opened contact and KM13 (VF1 drives M3) normally closed contact and KM01 (M1 power frequency) normally closed contact be connected into " with " logical relation, promptly under VF1 drives during the M1 converting operation, do not allow M3 to be subjected to VF1 to drive (but allowing M3 driven by VF2) again, do not allow the M1 power frequency operation simultaneously.
(2) the switching interlocking link of M2 and M3 during the converting operation under VF2 drives: with the normally opened contact of the normally opened contact of KA12 and KA23 and be unified into " or " logical relation is connected to the control coil loop of KM2, the pacing items of moving as M2; Add in the control coil loop of KM2 KM20 (VF2 driving) normally opened contact and KM23 (VF2 drives M3) normally closed contact and KM02 (M2 power frequency) normally closed contact be connected into " with " logical relation, promptly under VF2 drives during the M2 converting operation, do not allow M3 to be subjected to VF2 to drive (but allowing M3 driven by VF2) again, do not allow the M2 power frequency operation simultaneously.
(3) M3 is to the switching interlocking link between 2 AC converter VF1 and the VF2 control: with the normally opened contact of the normally opened contact of KA13 and KA23 and be unified into " or " logical relation is connected to the control coil loop of KM13 and KM23, the pacing items of moving as M3; Add in the control coil loop of KM13 (VF1 drive M3 converting operation) KM10 (VF1 driving) normally opened contact and KM1 (M1 does not move) normally closed contact and KM03 (M3 power frequency) normally closed contact be connected into " with " logical relation, promptly under VF1 drives during the M3 converting operation, do not allow M1 driven by VF1, do not allow the M3 power frequency operation simultaneously.Add in the control coil loop of KM23 (VF2 drive M3 converting operation) KM20 (VF2 driving) normally opened contact and KM2 (M2 does not move) normally closed contact and KM03 (M3 power frequency) normally closed contact be connected into " with " logical relation, promptly under VF2 drives during the M3 converting operation, do not allow M2 driven by VF2, do not allow the M3 power frequency operation simultaneously.
(4) the switching interlocking link between converting operation and the power frequency operation: the above-mentioned interlocking that has comprised power frequency to frequency conversion, the interlocking of frequency conversion to power frequency described here,---at the control coil loop of KM01 (M1 power frequency operation) series connection KM1 (M1 converting operation) normally closed contact, promptly do not allow its converting operation simultaneously during the M1 power frequency operation; At the control coil loop of KM02 (M2 power frequency operation) series connection KM2 (M2 converting operation) normally closed contact, promptly do not allow its converting operation simultaneously during the M2 power frequency operation; Add in the control coil loop of KM03 (M3 power frequency operation) KM13 (VF1 drives the M3 converting operation) normally closed contact be connected into KM23 (VF2 drives the M3 converting operation) normally closed contact " with " logical relation, promptly do not allow its converting operation (do not allowed by frequency converter VF1 or VF2 driving) simultaneously during the M3 power frequency operation no matter be.
Claims (4)
1. combined two control-dual-purposes one are equipped with system controller, it is characterized in that: controller is made up of major loop and control circuit, major loop is provided with two AC converter VF1-VF2, three controlled motor M1-M3 and contactor KM1-KM2 and KM13, wherein the output of AC converter VF1 connects controlled motor M1, connects controlled motor M3 through the main contacts of contactor KM13 through the main contacts of contactor KM1 respectively; The output of AC converter VF2 connects the main contacts connection controlled motor M3 of controlled motor M2, process contactor KM23 respectively through the main contacts of contactor KM2; The same controlled motor M3 of the common connection of AC converter VF1-VF2; Control circuit comprises contactor, relay and knob, it connects by a plurality of contactors, relay, steering logic is set the dual-purpose one of three controlling object M1-M3 is equipped with state interlocking switching controls with two frequency converter VF1-VF2, three closing of contact on positions by control handle SA, realize the switching controls between three kinds of duties: during the SA-12 closing of contact, realize that 1-2 combination: M1 is controlled by VF2 by VF1 control, M2, M1 and M2 duty, M3 are standby; During the SA-13 closing of contact, realize that 1-3 combination: M1 is controlled by VF2 by VF1 control, M3, M1 and M3 duty, M2 are standby; During the SA-23 closing of contact, realize that 2-3 combination: M2 is controlled by VF1 by VF2 control, M3, M2 and M3 duty, M1 are standby.
2. a kind of combined two control-dual-purposes one according to claim 1 are equipped with system controller, and it is characterized in that: the logic control connection of control circuit is set to, the normally opened contact of KA12 and the normally opened contact of KA13 and be unified into " or " logic is connected to the control loop of KM1; In the loop control logic of contactor KM1, the normally closed contact that inserts the normally opened contact of contactor KM10 and contactor KM13 and KM01 be connected into " with " the logic control wiring; When realizing described frequency converter VF1 operation, the interlocking switching controls of controlled motor M1 and M3.
3. a kind of combined two control-dual-purposes one according to claim 1 are equipped with system controller, and it is characterized in that: the logic control connection of control circuit is set to, the normally opened contact of KA12 and the normally opened contact of KA23 and be unified into " or " logic is connected to the control loop of KM2; In the loop control logic of contactor KM2 output, the normally closed contact that inserts the normally opened contact of contactor KM20 and contactor KM23 and KM02 be connected into " with " the logic control wiring; When realizing described frequency converter VF2 operation, the interlocking switching controls of controlled motor M2 and M3.
4. a kind of combined two control-dual-purposes one according to claim 1 are equipped with system controller, it is characterized in that: the logic control of control circuit connects and is set to, the normally opened contact of KA13 and the normally opened contact of KA23 and be unified into " or " logic is connected to the control loop of KM13 and KM23; In the loop control logic of contactor KM13, the normally closed contact that inserts the normally opened contact of contactor KM10 and contactor KM1 and KM03 be connected into " with " the logic control wiring; In the loop control logic of contactor KM23, the normally closed contact that inserts the normally opened contact of contactor KM20 and contactor KM2 and KM03 be connected into " with " the logic control wiring; To realize the described controlled motor M3 interlocking switching controls between two frequency converter VF1 and VF2 control respectively.
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| CN2008100495329A CN101561664B (en) | 2008-04-14 | 2008-04-14 | Method for controlling combined type double-control and double-purpose single-backup system and controller thereof |
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| CN2008100495329A CN101561664B (en) | 2008-04-14 | 2008-04-14 | Method for controlling combined type double-control and double-purpose single-backup system and controller thereof |
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| CN101976998A (en) * | 2010-10-29 | 2011-02-16 | 中国神华能源股份有限公司 | Variable-frequency driving device and control method thereof |
| CN106026792A (en) * | 2016-05-26 | 2016-10-12 | 江苏省冶金设计院有限公司 | Power frequency and variable frequency operation switching control device for three working air blowers and two standby air blowers |
| CN106523338B (en) * | 2016-12-16 | 2019-01-01 | 山东金洲科瑞节能科技有限公司 | A kind of central air-conditioner cooling water circulation pump control system monitoring real time energy consumption |
| CN106765941B (en) * | 2016-12-16 | 2022-07-05 | 山东金洲科瑞节能科技有限公司 | Central air conditioning fresh air unit control system for monitoring real-time energy consumption |
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