CN201191374Y - Electric wire type field bus coal plough control system - Google Patents
Electric wire type field bus coal plough control system Download PDFInfo
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- CN201191374Y CN201191374Y CNU200820029049XU CN200820029049U CN201191374Y CN 201191374 Y CN201191374 Y CN 201191374Y CN U200820029049X U CNU200820029049X U CN U200820029049XU CN 200820029049 U CN200820029049 U CN 200820029049U CN 201191374 Y CN201191374 Y CN 201191374Y
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The utility model discloses a power-line type field-bus coal plough control system, which comprises a power supply system, a main PLC control system, a coal plough body control system and a remote control signal transmission system between the main PLC control system and the coal plough body control system, wherein the remote control signal transmission system comprises a main control device, a sub-control device and a cable. The main PLC control system is connected with the main control device via communication or hard-wired mode, the sub-control device is parallelly connected to a terminal board on the main control device bus side via a ring network composed of cables, the main control device transmit control signals to the sub-control device via the ring network, and the sub-control device connected with a control loop of the coal plough body control system via an I/O interface circuit uploads the status information thereof to the main PLC control system. The utility model is low in equipment investment and operation cost, and strong in interference resistance capacity during control signal transmission, can effectively resolves problems of reliability and advancement of the remote multiple devices control system, and convenience of operating, modulating and cable laying.
Description
Technical field
The utility model relates to the power electronics technical field of automatic control, especially relates to a kind of line of electric force formula fieldbus coal plough control system that is applicable to the remote auto control field of electromechanical equipments such as mine, metallurgy.
Background technology
Coal plough is as the main coal blending means of fuel-burning power plant coal handling system coal bunker layer, and it plays an important role in defeated coal technological process.Because its quantity is many, arrange characteristics such as dispersion, time lag inertia is big, the cable laying difficulty is big, thereby be regarded as topmost monitored object in the defeated coal stored program controlled in whole fuel-burning power plant.With respect to other controlled device, it still has following singularity except that some the general characteristics with coal handling system: 1, coal bunker layer coal plough One's name is legion and to distribution and control require identical; 2, coal plough motor power (output) little (general 1.5kW), the possibility that plural coal plough moves does not simultaneously exist; 3, all coal ploughs are linear distribution along the belt limit, and the front and back scope can reach one or two hundred meters; 4, coal plough action itself needs the time, belongs to the large dead time inertial equipment, and is less demanding to the real-time of control; 5, coal plough still requires the local operation function except that distant place control, and local operation case or electric cabinet on the spot all are set in the engineering basically; 6, PLC controlling schemes coal plough signal cable is very long, and control loop is subjected to the forceful electric power serious interference; 7, the coal bunker layer belongs to strip, and coal plough relevant cables radical is many, and the cable laying difficulty is big, and cable cleaning in service is difficult for; 8, process system coal plough motor in service is in halted state, only lifts at the completely back coal plough of coal bunker to be in running status in the handoff procedure in short-term, and process is of short duration; 9, the technology specialty setting of coal bunker high charge level meter and coal plough are provided with corresponding, corresponding high charge level meter of coal plough in general.
At These characteristics, the scheme of electric power of coal plough substantially all adopts the radial pattern power supply plan in the defeated coal stored program controlled in existing fuel-burning power plant, special coal bunker layer distribution MCC cabinet is set, in the MCC cabinet, independently MCC drawer (or loop) power supply unit is set for every coal plough, each coal plough is other to be provided with an electric cabinet on the spot, the overall plan of respectively drawing a VV type cable on the spot between the electric cabinet at each MCC power supply unit and coal plough.Wherein the quantity of power supply unit in the MCC cabinet, quantity, the coal plough quantity three correspondence of electric cabinet are identical on the spot.Difference according to coal plough distribution arrangements of elements position, can be further divided into to be provided with in the MCC cabinet and mould the shell switch, be provided with in contactor and electrothermal relay and the MCC cabinet in the electric cabinet and establish elements such as moulding shell switch, contactor and electrothermal relay on the spot, two kinds of patterns of setting operation element only in the local operation case.And existing fuel-burning power plant coal handling system is at the controlling schemes of coal plough, since adopting the realization of PLC technology program control, nearly all project all adopts to concentrate at the coal bunker layer distant station is set, the scheme that links to each other with many umbilical cable between case and the program control cabinet on the spot at each coal plough.Existing scheme has following characteristics: 1, the coal bunker layer is provided with special distant station, and the I/O signal of all coal plough of coal bunker layer is distant station access thus all; 2, coal bunker high charge level meter is powered separately, and the high charge level signal adopts independently cable introducing coal bunker layer distant station, and each level-sensing device comprises one on cable at least; 3, between each coal plough and the stored program controlled all with many radial linking to each other of cable, comprise one on DI cable, one on DO cable at least; 4, to the PLC scheme, each coal plough generally only is provided with and lifts to the position, falls position, program control position, four the DI points in fault position, is provided with and lifts control, falls to controlling two DO points.
To sum up because coal bunker layer coal plough linear distribution is reaching one or two hundred meters scopes, there are following problem in existing distribution and controlling schemes: 1, the cable amount of coal plough system cost is huge, and the disposable buying expenses of cable is very high; 2, MCC cabinet, program control cabinet quantity are many, and the equipment investment expense is big, and the equipment layout area is big; 3, coal bunker layer cable radical is many, cable passage design, constructional difficulties; 4, the DI/DO number of signals of access stored program controlled is limited, and automatization level is low; 5, coal bunker layer cable pipe laying quantity is many, and the site operation workload is big; 6, cable laying workload is big, and the construction period is long; 7, the total system wiring point is many, difficulties such as field wiring, debugging and troubleshooting; 8, the relevant umbilical cable length of coal plough is long, and the forceful electric power interference problem that is subjected in service is serious; 9, the cable installation dust stratification was serious after system put into operation, cable cleaning difficulty.
The utility model content
Technical problem to be solved in the utility model is at above-mentioned deficiency of the prior art, a kind of line of electric force formula fieldbus coal plough control system is provided, its system equipment investment and operating cost are low, the transmission of control signals antijamming capability is strong, can effectively solve the simplicity problem of reliability, advance, dirigibility and operation operation, debugging and the cable laying of long-range multiple devices control system.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of line of electric force formula fieldbus coal plough control system, the power supply system that comprises the coal plough body, main PLC control system and coal plough body control system and the distant place control signal transmission system between the two, it is characterized in that: described distant place control signal transmission system comprises master control set, distributed control device and cable, be two-way communication between wherein main PLC control system and the coal plough body control system, be connected with communication modes or hardwire mode between main PLC control system and master control set, each master control set all links to each other with a plurality of distributed control devices respectively by the looped network of being made up of cable, each distributed control device is installed on respectively in the electrical control cubicles on the spot of each coal plough body, and each distributed control device all is connected in parallel on the control end of master control set by the looped network that cable is formed; Described master control set and distributed control device are by system works circuit and power supply and choke circuit composition, master control set system works circuit is made up of low voltage power line carrier module one and communications protocol function modular converter one, distributed control device system works circuit is made up of low voltage power line carrier module two, communications protocol function modular converter two and I/O interface circuit, and distributed control device joins by the control loop of described I/O interface circuit and coal plough body control system; Be connected to a high charge level meter on each distributed control device respectively.
Be connected with communication modes between described main PLC control system and master control set, and the two connects by the third party device interface module.
Described each master control set is corresponding to link to each other with interior separate distributed control device with 30.
Described master control set and third party device interface module all are arranged in the coal bunker layer distant station.
Be connected in hard wired mode between described distributed control device and the coal plough body control system.
Between described master control set and the cable, all be connected between distributed control device and the cable by terminal row.
Adopt cable connected in series between the power circuit of the described a plurality of distributed control devices that are connected with each master control set, its, the power circuit of two distributed control devices of tail connects power supply system respectively, the current supply circuit of forming a closure by cable between the power circuit of a plurality of distributed control devices and power supply system carries out centrally connected power supply.
Described master control set is one or more.
To sum up, the utility model compared with prior art, have the following advantages: 1, adopt the line of electric force field bus technique, control signal is transmitted with carrier system, have only with signal frequently and just can cause interference system, thereby this interference can predict and be eliminated by various measures, improved the antijamming capability of system thus greatly; 2, the cable radical sharply reduces, and cable only needs almost no longer to need the cable testing bridge material along belt limit cable installation in pipe, has also made things convenient for the cleaning of cable; 3, equipment layout in the scene on the spot, degree of protection is the IP67 level; 4, overhaul of the equipments and easy maintenance only need to check several simple buses and several fieldbus module; 5, the construction working amount greatly reduces, its MCC cabinet face number minimizing, the minimizing of program control cabinet quantity, cable radical and sharply minimizing of length, field wiring and school line workload sharply reduce, therefore greatly shortened the engineering construction cycle, accelerated the engineering construction progress, the integrated automation level of control system improves greatly simultaneously; 6, the task of field wiring has only the fieldbus cable connection, and the coal plough interior wiring of electric cabinet is on the spot just finished before equipment dispatches from the factory, and it is intact that the task of field adjustable guarantees that just bus cable is communicated with, so the scene does not almost have debugging work load; 7, adopt connect up simply and easily VV or KVV cable as the carrier of fieldbus signal transmission, both had site operation and safeguarded characteristic of simple, have all advantages of other common field bus technology again, and equipment price is cheap; 8, widely applicable, not only applicable to electric power, electron trade automation control area, can open up in the automation control system of multiple industry electromechanical equipments such as extensively applying to mine, metallurgy; 9, the laying structure of bus is free topological structure between master control set and distributed control device, and convenient and reliability angle generally adopts ring type structure from field wiring.In a word, this coal plough control system is from saving the construction investment cost, satisfying the angle of equipment actual power reliability requirement again sets out, change primary radiation type power supply controlling schemes into the ring type supply controlling schemes, its system architecture is simply clear, automaticity is high, the cable consumption is few, the site operation workload is little, antijamming capability is strong, operation maintenance is convenient, system reliability is high, the overall technology index is good, for the construction of fuel-burning power plant brings tangible economic benefit.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Description of drawings
Fig. 1 is the structured flowchart of a kind of line of electric force formula of the utility model fieldbus coal plough control system.
Fig. 2 is the structured flowchart of the utility model distributed control device part.Description of reference numerals:
The 1-power supply system; 2-master PLC control system; The 6-cable;
7-coal bunker layer distant station; The 8-master control set; 9-third party device interface module;
11-master control set system worker 12-power supply and choke circuit 13-low voltage power line carrier module
Make circuit; One; One;
14-communications protocol function is changeed the 15-distributed control device; 16-distributed control device system works
Die change piece one; The road;
17-low voltage power line carrier 18-communications protocol function is changeed 19-power supply and choke circuit two;
Module two; Die change piece two;
The 21-terminal row; The 22-control loop; The 23-power module;
24-high charge level meter.
Embodiment
As shown in Figure 1 and Figure 2, described line of electric force formula fieldbus coal plough control system comprises the power supply system 1 of coal plough body, main PLC control system 2 and coal plough body control system and the distant place control signal transmission system between the two.Described distant place control signal transmission system comprises master control set 8, distributed control device 15 and cable 6, be two-way communication between wherein main PLC control system 2 and the coal plough body control system, 8 of main PLC control system 2 and master control sets are connected with communication modes or hardwire mode, each master control set 8 links to each other with a plurality of distributed control devices 15 respectively by the looped network of being made up of cable 6, each distributed control device 15 is installed on respectively in the electrical control cubicles on the spot of each coal plough body, and described each distributed control device 15 all is connected in parallel on the terminal row 21 of bus side of master control set 8 by looped network, by distributed control device 15 directly the coal ploughs that linked to each other of control lift motion.In the practice, 8 of the main PLC control system 2 and the master control sets of coal plough control system are general all to be connected with communication modes.
Pass through the I/O interface between described distributed control device 15 and coal plough body control system, connect in hard wired mode, and described I/O interface is positioned on the spot on the electrical control cubicles, by be installed in the electrical control cubicles on the spot distributed control device 15 directly control coal plough mechanical parts lift action.8 of main PLC control system 2 and master control sets be connected with communication modes and the two between connect by third party device interface module 9, and third party device interface module 9 is powered by the power module 23 that joins with it.In addition, master control set 8 all is arranged in the coal bunker layer distant station 7 with third party device interface module 9, and the hardware connection point between promptly main PLC control system 2 and the master control set 8 is distributed in the coal bunker layer distant station 7.To sum up, be two-way communication between main PLC control system 2 and the coal plough body control system, described master control set 8 can be for one or more, and main PLC control system 2 is controlled by the one or more separate master control set 8 in 9 pairs of control signal transmission systems of third party device interface module; Each master control set 8 passes to coupled a plurality of separate distributed control device 15 by a looped network being made up of cable 6 with the control signal of main PLC control system 2, and distributed control device 15 is oppositely uploaded its corresponding state information to main PLC control system 2 again simultaneously.Wherein, each master control set 8 can correspondingly link to each other with interior separate distributed control device 15 with 30 by looped network.
Adopt cable 6 connected in series between the power circuit of a plurality of distributed control devices 15 that are connected with each master control set 8, its, the power circuit of two distributed control devices 15 of tail connects the power supply system 1 of coal plough respectively, 1 current supply circuit of forming a closure by cable 6 of the power circuit of a plurality of distributed control devices 15 and power supply system carries out centrally connected power supply.In this control system, also power supply system 1 power circuit direct respectively and each distributed control device 15 can be joined, each distributed control device 15 is carried out decentralized power supply.In addition, master control set 8 all is connected by terminal row 21 with 6 on cable with cable 6, distributed control device 15, and its cable 10 is KVV or VV type cable.
Described master control set 8 and distributed control device 15 are by system works circuit and power supply and choke circuit composition, master control set system works circuit 11 is made up of low voltage power line carrier module 1 and communications protocol function modular converter 1, and wherein power supply and one 12 pairs of master control set system works of choke circuit circuit 11 are powered and the various noises that may exist master control set system works circuit 11, interference wave etc. have obstruction and buffer action.Distributed control device system works circuit 16 is made up of low voltage power line carrier module 2 17, communications protocol function modular converter 2 18 and I/O interface circuit, and power supply and choke circuit 2 19 equally distributed control device system works circuit 16 powered and the various noises that may exist distributed control device system works circuit 16, interference wave etc. have and hinder and buffer action.Distributed control device 15 joins with the control loop 22 of coal plough body control system, and be that common multiply flexible cord connects by hardwire between the two, the electrical control cubicles on the spot that is each coal plough body is connected with control loop 22 by the above-mentioned I/O interface that is provided on it, directly controls the action of coal plough mechanical part by control loop 22.In addition, be connected to a high charge level meter 24 respectively on each distributed control device 15.To sum up, realization distributed control device 15 is directly controlled the coal plough mechanical parts and is lifted motion.
That is to say, can be connected by serial communication mode, hardwire or twisted-pair feeder mode between master control set 8 and the telecommunication module, all join between master control set 8 and the distributed control device 15, between each distributed control device 15 by the cable 6 of terminal row 21 with KVV or VV type.Arbitrary electrical control cubicles on the spot can be isolated fully during execute-in-place, to guarantee each maintenance convenience of electrical control cubicles on the spot; And, can not influence other distributed control device 15 work in electrical control cubicles on the spot fully in any electrical control cubicles and after it is quit work on the spot of maintenance.
In the practice according to the real needs index of building fuel-burning power plant, can the different allocation plan of corresponding selection, the master control set 8 and the distributed control device 15 of corresponding configuration varying number.In this embodiment, dispose four master control sets, 8 corresponding control four component control devices 15, every component control device 15 is made up of five or six distributed control devices 15 respectively.
In concrete operational process, master control set 8 mainly finish and main PLC control system 2 between interface communication, and fieldbus distributed control device 15 between communication, a component control device 15 of its control is controlled functions such as coordination.Interface between the host CPU of master control set 8 and program control indoor main PLC control system 2 comprises and receives the steering order that defeated coal stored program controlled is sent, simultaneously again with the packing data of the action status information of coal plough and upload synchronously, feed back in the host CPU of program control indoor main PLC control system 2.And place distributed control device 15 in the electrical control cubicles on the spot mainly to finish on the spot various steering logics of coal plough body, receive the distant place steering order that fieldbus master control set 8 sends and carry out, prepare the required various data of defeated coal stored program controlled etc.The effect of wave arrestment device is high-frequency signal in this control system and ambient systems isolated, in order to avoid system impacts and disturbs to external world.
The concrete course of work is: the host CPU of program control indoor main PLC control system 2 by the telecommunication module to master control set 8 transfer control instructions, be transformed to high-frequency signal behind the modulation circuit of this digital controlled signal in communications protocol function modular converter 1, low voltage power line carrier module 1, this that is sent to respectively that it controls through the high-frequency signal of KVV type cable ring-system after with conversion is organized each distributed control device 15 again; Distributed control device 15 demodulator circuit in low voltage power line carrier module 2 17, communications protocol function modular converter 2 18 equally successively is transformed to digital control instruction with high-frequency signal and is sent to the motion state that coal plough control loop 22 is tackled coal plough mutually and controls.Simultaneously, distributed control device 15 is with the motion state information data packing of the coal plough collected and upload, is to be uploaded to master control set 8 behind the high-frequency signal by the modulation circuit in communications protocol function modular converter 2 18, the low voltage power line carrier module 2 17 with signal transformation, and the demodulator circuit in low voltage power line carrier module 1, communications protocol function modular converter 1 feed back to the motion state signal of coal plough the host CPU of program control indoor main PLC control system 2 equally successively.
The above; it only is preferred embodiment of the present utility model; be not that the utility model is imposed any restrictions; everyly any simple modification that above embodiment did, change and equivalent structure are changed, all still belong in the protection domain of technical solutions of the utility model according to the utility model technical spirit.
Claims (8)
1. line of electric force formula fieldbus coal plough control system, the power supply system (1) that comprises the coal plough body, main PLC control system (2) and coal plough body control system and the distant place control signal transmission system between the two, it is characterized in that: described distant place control signal transmission system comprises master control set (8), distributed control device (15) and cable (6), be two-way communication between wherein main PLC control system (2) and the coal plough body control system, be connected with communication modes or hardwire mode between main PLC control system (2) and master control set (8), each master control set (8) all links to each other with a plurality of distributed control devices (15) respectively by the looped network of being made up of cable (6), each distributed control device (15) is installed on respectively in the electrical control cubicles on the spot of each coal plough body, and each distributed control device (15) all is connected in parallel on the control end of master control set (8) by the looped network that cable (6) is formed; Described master control set (8) and distributed control device (15) are by system works circuit and power supply and choke circuit composition, master control set system works circuit (11) is made up of low voltage power line carrier module one (13) and communications protocol function modular converter one (14), distributed control device system works circuit (16) is made up of low voltage power line carrier module two (17), communications protocol function modular converter two (18) and I/O interface circuit, and distributed control device (15) joins by the control loop (22) of described I/O interface circuit and coal plough body control system; Be connected to a high charge level meter (24) on each distributed control device (15) respectively.
2. according to the described line of electric force formula of claim 1 fieldbus coal plough control system, it is characterized in that: be connected with communication modes between described main PLC control system (2) and master control set (8), and the two connects by third party device interface module (9).
3. according to claim 1 or 2 described line of electric force formula fieldbus coal plough control system, it is characterized in that: described each master control set (8) is corresponding to link to each other with interior separate distributed control device (15) with 30.
4. according to claim 1 or 2 described line of electric force formula fieldbus coal plough control system, it is characterized in that: described master control set (8) all is arranged in the coal bunker layer distant station (7) with third party device interface module (9).
5. according to claim 1 or 2 described line of electric force formula fieldbus coal plough control system, it is characterized in that: be connected in hard wired mode between described distributed control device (15) and the coal plough body control system.
6. according to claim 1 or 2 described line of electric force formula fieldbus coal plough control system, it is characterized in that: between described master control set (8) and the cable (6), all be connected between distributed control device (15) and the cable (6) by terminal row (21).
7. according to claim 1 or 2 described line of electric force formula fieldbus coal plough control system, it is characterized in that: adopt cable (6) connected in series between the power circuit of the described a plurality of distributed control devices (15) that are connected with each master control set (8), the power circuit of its head, two distributed control devices of tail (15) connects power supply system (1) respectively, and the current supply circuit by a closure of cable (6) composition between the power circuit of a plurality of distributed control devices (15) and power supply system (1) carries out centrally connected power supply.
8. according to claim 1 or 2 described line of electric force formula fieldbus coal plough control system, it is characterized in that: described master control set (8) is for one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820029049XU CN201191374Y (en) | 2008-05-08 | 2008-05-08 | Electric wire type field bus coal plough control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820029049XU CN201191374Y (en) | 2008-05-08 | 2008-05-08 | Electric wire type field bus coal plough control system |
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| CN201191374Y true CN201191374Y (en) | 2009-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820029049XU Expired - Lifetime CN201191374Y (en) | 2008-05-08 | 2008-05-08 | Electric wire type field bus coal plough control system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097756A (en) * | 2009-12-11 | 2011-06-15 | 贵阳铝镁设计研究院 | Distribution structure for electric equipment of coaling system and control method thereof |
| CN102591247A (en) * | 2012-02-01 | 2012-07-18 | 浙江工业大学 | Power-carrier-based PLC control system comprising addressable relay and switch |
| CN104914796A (en) * | 2014-03-10 | 2015-09-16 | 株式会社东和电机制作所 | Control system of fishing device |
| CN107147010A (en) * | 2017-06-30 | 2017-09-08 | 青岛鸿瑞电力工程咨询有限公司 | A kind of corner pulverized-coal fired boiler electric power system |
| CN109542026A (en) * | 2019-01-03 | 2019-03-29 | 中国恩菲工程技术有限公司 | The distribution and control device and control system of shaking table cluster |
| CN112965420A (en) * | 2015-01-30 | 2021-06-15 | 费希尔-罗斯蒙特系统公司 | Apparatus to communicatively couple a three-wire field device to a controller in a process control system |
| CN113224838A (en) * | 2021-03-30 | 2021-08-06 | 中国人民解放军海军工程大学 | Fifteen-phase large-capacity induction propulsion frequency converter control framework |
-
2008
- 2008-05-08 CN CNU200820029049XU patent/CN201191374Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097756A (en) * | 2009-12-11 | 2011-06-15 | 贵阳铝镁设计研究院 | Distribution structure for electric equipment of coaling system and control method thereof |
| CN102097756B (en) * | 2009-12-11 | 2014-03-12 | 贵阳铝镁设计研究院有限公司 | Distribution structure for electric equipment of coaling system and control method thereof |
| CN102591247A (en) * | 2012-02-01 | 2012-07-18 | 浙江工业大学 | Power-carrier-based PLC control system comprising addressable relay and switch |
| CN102591247B (en) * | 2012-02-01 | 2014-07-02 | 浙江工业大学 | Power-carrier-based PLC control system comprising addressable relay and switch |
| CN104914796A (en) * | 2014-03-10 | 2015-09-16 | 株式会社东和电机制作所 | Control system of fishing device |
| CN112965420A (en) * | 2015-01-30 | 2021-06-15 | 费希尔-罗斯蒙特系统公司 | Apparatus to communicatively couple a three-wire field device to a controller in a process control system |
| CN107147010A (en) * | 2017-06-30 | 2017-09-08 | 青岛鸿瑞电力工程咨询有限公司 | A kind of corner pulverized-coal fired boiler electric power system |
| CN109542026A (en) * | 2019-01-03 | 2019-03-29 | 中国恩菲工程技术有限公司 | The distribution and control device and control system of shaking table cluster |
| CN113224838A (en) * | 2021-03-30 | 2021-08-06 | 中国人民解放军海军工程大学 | Fifteen-phase large-capacity induction propulsion frequency converter control framework |
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