CN101817473B - Frequency conversion system of rotor of alternating current mine hoist - Google Patents

Frequency conversion system of rotor of alternating current mine hoist Download PDF

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Publication number
CN101817473B
CN101817473B CN2010101463318A CN201010146331A CN101817473B CN 101817473 B CN101817473 B CN 101817473B CN 2010101463318 A CN2010101463318 A CN 2010101463318A CN 201010146331 A CN201010146331 A CN 201010146331A CN 101817473 B CN101817473 B CN 101817473B
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rotor
control plc
gig
pressure regulating
detecting
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CN101817473A (en
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郑孝平
高自政
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LUOYANG YUANCHUANG ELECTRIC CO Ltd
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LUOYANG YUANCHUANG ELECTRIC CO Ltd
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Abstract

The invention mainly provides a frequency conversion system of a rotor of an alternating current mine hoist. An electromotor rotor winding, a rotor frequency modulation and voltage modulation device (1) and a switch cabinet (2) form a rotor frequency conversion and speed regulation part; a process control part consisting of a master control PLC (Programmable Logic Controller) and an auxiliary control PLC realizes a bi-wiring type of the system control of the mine hoist; an operation platform and a host computer realize the bi-wiring type of the system monitoring of the mine hoist together; a first speed measurement element (7) and a second speed measurement element (8) installed at the end of the spindle of the hoist and a first limit switch (9) or a second limit switch (10) installed in a shaft form a depth and speed detecting part to realize the three-wire type of hoisting position control, data exchange is performed among the master control PLC (3), the auxiliary control PLC (4), a human-computer interface (5) and the rotor frequency modulation and voltage modulation device (1) through a network or a point-to-point communication mode; and the master control PLC (3) and a controlled and detecting element in the hoist are connected through a cable.

Description

Frequency conversion system of rotor of alternating current mine hoist
Technical field
The invention belongs to the mine hoist frequency conversion control technique, mainly propose a kind of frequency conversion system of rotor based on AC mine winder rotor frequency modulation pressure regulating apparatus.
Background technology
At present, known ac elevator speed governing is to be undertaken by the metallic resistor that changes the outer serial connection of rotor that exchanges wire wound asynchronous motor, seals in all resistance before the acceleration, excise resistance then step by step, gig quickens, and after all resistance cut, gig moved with command speed; In the decelerating phase, drop into electric braking electric current (low frequency current or DC current) and under the cooperation of rotor guest performer resistance, just can carry out controlled deceleration.But the rotor series resistor of this interchange wire wound asynchronous motor carries out the mode of speed governing, mainly has following shortcoming: the 1) metallic resistor of needs tens casees even case more than 200, and floor area is big; 2) quicken at gig, slow down and in the process that weight is transferred, a large amount of power consumptions is arranged on resistance, waste a large amount of energy, do not meet the policy of national energy-saving and emission-reduction; 3) step speed regulation, speed adjusting performance is poor; 4) stator side at electrical motor exists the frequent contact commutation being arranged and throw braking current to switch, and equipment dependability is not high.
The mode of speed control that changes this rotor guest performer resistance has two kinds of schemes, one: with the motor rotor winding at outlet terminal place short circuit, adopt high voltage converter that electrical motor is controlled and speed governing in stator side, but this high voltage converter is to be formed by three groups of a plurality of low-voltage variable frequency power unit cascades, power cell quantity is 3X6 (6KV) or 3X9 (10KV) normally, in addition, also will adopt secondary is many winding three-phase rectifier transformer (winding quantity is identical with the power cell number), hardware and manufacturing process complexity exist potential faults point many with respect to low voltage frequency converter, volume is big, shortcomings such as cost height; Its two: with the motor stator winding at outlet terminal place short circuit, rotor-side adopt output voltage and rotor rated voltage to be complementary low voltage frequency converter---AC mine winder rotor frequency modulation pressure regulating apparatus is controlled also speed governing to electrical motor, (applicant formerly proposes AC mine winder rotor frequency modulation pressure regulating apparatus by Chinese patent, application for a patent for invention number: CN200810141371.6) open, this rotor frequency modulation pressure regulating apparatus is characterised in that: input is state specified standards power supply voltage such as 380V, 660V, 1140V, 3KV, 6KV, 10KV, the rated voltage and the motor rotor rated voltage of output are complementary, though the specified rotor voltage of electrical motor does not have unified standard (for the electrical motor of different model different manufacturers, the rated voltage of its armature loop is different), but most rotor rated voltages are less than 1140V, in other words, this scheme is that the method with low-voltage variable frequency has solved the problem that high voltage converter could solve, hardware is simple and reliable, cost is lower, from the situation of practicality, the scheme of result of use and high voltage converter compares favourably.
Summary of the invention
The present invention proposes a kind of frequency conversion system of rotor of alternating current mine hoist, carries out the direct frequency modulation pressure regulation by the rotor to the interchange wire wound asynchronous motor, thereby realizes AC mine winder is carried out speed governing and control.
The present invention takes following technical scheme to finish its goal of the invention: a kind of frequency conversion system of rotor of alternating current mine hoist, rotor frequency conversion speed-adjusting part by motor rotor winding, rotor frequency modulation pressure regulating apparatus and switch cubicle are formed provides the ac power power supply of frequency and voltage variable for promoting electrical motor; The mouth of rotor frequency modulation pressure regulating apparatus and motor rotor winding join, and the stator winding of electrical motor is at its lead-out terminal place short circuit, and the input end of rotor frequency modulation pressure regulating apparatus is received the mouth of switch cubicle, and the input end of switch cubicle is received on the electrical network; By main control PLC and auxilliary control PLC anabolic process control part, to gig whole service process---acceleration, constant speed, slow down, creep and parking is controlled; By man-machine interface is operator's station, host computer and chopping machine are formed the process monitoring part, gig whole service process is monitored, by the operator's station in the man-machine interface gig is started, stop and sudden stop is controlled, and can observe the voltage of key parameters and signal of interest situation such as rotor, electric current, the make-and-break signal of frequency and hoisting speed and safety return circuit etc., host computer in the man-machine interface is finished the real-time demonstration to the key parameters and the signal of interest situation of gig whole service process, real time recording, report form statistics etc., realize the two-wire pattern of mine hoist system monitoring, chopping machine is by the figure of mode to being write down in the host computer of communication, table carries out hard copy or printing; Be provided with the communication network interface card in the host computer, the mode by network communication is connected with the internet and realizes described frequency conversion system of rotor of alternating current mine hoist is carried out remote diagnosis and Long-distance Control; By first detecting element that is loaded on the main shaft of hoister axle head, second detecting element be loaded on first limit switch in the pit shaft or second limit switch is formed degree of depth speed test section and for control part provides the real-time degree of depth of lifting container and speed signal, the signal of described first detecting element, second detecting element is connected respectively to the control that forms the two-wire pattern among main control PLC and the auxilliary control PLC; First limit switch, the second limit switch limit switch are connected in the main control PLC 3 respectively as the lifting container forward lifting of position closed loop control or the actual position signal that oppositely promotes, first detecting element, second detecting element and first limit switch or second limit switch are realized the three-way pattern of raised position control, guarantee the safe operation of gig; Carry out data exchange by network or point-to-point communication mode between main control PLC, auxilliary control PLC, man-machine interface and the rotor frequency modulation pressure regulating apparatus; Controlled and detecting element passes through cable connection in main control PLC and the gig, main control PLC is by finishing the control of controlled member in rotor frequency modulation pressure regulating apparatus and the gig mine hoist acceleration, constant speed, the operational process control of slowing down, creeping and stopping, in this process, auxilliary control PLC finishes correctness and accuracy that main control PLC is carried out and monitors, and realizes the two-wire pattern of mine hoist system control.
Compared to prior art, the present invention proposes the frequency conversion system of rotor of alternating current mine hoist based on AC mine winder rotor frequency modulation pressure regulating apparatus, the AC mine winder electric-control system that can replace the rotor outer meeting resistance, and realization infinite speed variation, overcome AC mine winder electric-control system shortcoming by generating heat expenditure of energy being fallen in the speed regulation process of gig of rotor outer meeting resistance, realized purpose of energy saving; And, method with low-voltage variable frequency has solved the problem that high voltage converter could solve, that relatively high pressure frequency conversion scheme has is simple in structure, potential faults point less, low cost and other advantages, simultaneously, the frequency conversion system of rotor of alternating current mine hoist that the present invention proposes, aspect control and monitoring, realize the two-wire pattern, the controlling party face is realized three-way pattern in the position, improved the safe reliability of hoister control system, and have remote diagnosis and a remote control function, improved the rapidity of production efficiency and technical service, guaranteed that the gig operation is more steadily with safe and reliable.
AC mine winder rotor frequency modulation pressure regulating apparatus is (with reference to application for a patent for invention number: the 200810141371.6) problem that has solved usefulness and operated steadily, the present invention has then solved the safety issue of hoister control system, the two organic combination, therefore, described frequency conversion system of rotor of alternating current mine hoist both also had been applicable to the technological change of old equipment applicable to the new installation type selecting, the purpose that reach energy-conservation, improves drive ability and safe reliability has practical value.
Description of drawings
Fig. 1 is a functional block diagram of the present invention.
Among the figure, 1. rotor frequency modulation pressure regulating apparatus, 2. switch cubicle, 3. main control PLC is 4. assisted control PLC, 5. man-machine interface, 6. chopping machine, 7. first detecting element, 8. second detecting element, 9. first limit switch, 10. second limit switch, 11. electrical motors, 12. gigs (contain: retarder, reel, hydraulic brake, Hydraulic Station, lifting container, Deng), 13. the Internet network.
The specific embodiment
In conjunction with the accompanying drawings the embodiment of the invention is illustrated:
In Fig. 1, the frequency conversion system of rotor of alternating current mine hoist that the present invention proposes mainly is made up of rotor frequency conversion speed-adjusting part A, process control part B, process monitoring portion C, degree of depth speed test section D; The rotor frequency conversion speed-adjusting part is by switch cubicle 2, rotor frequency modulation pressure regulating apparatus 1 and electrical motor 11 are formed, (with reference to application for a patent for invention number: mouth 200810141371.6) and electrical motor 11 armature loops join rotor frequency modulation pressure regulating apparatus 1, the stator winding of electrical motor 11 is at its lead-out terminal place short circuit, the input end of rotor frequency modulation pressure regulating apparatus 1 is received the mouth of switch cubicle 2, the input end of switch cubicle 2 is received on the electrical network, electrical network can be the normal voltage of domestic any grade, as 380V, 660V, 1140V, 3KV, 6KV, 10KV, rotor frequency modulation pressure regulating apparatus 1 becomes the normal voltage of electrical network the alternating current of frequency and voltage variable and provides electrical source of power for the rotor of electrical motor 11, electrical motor 11 drives gig 12 by mechanical axis and (contains: retarder, reel, hydraulic brake, Hydraulic Station, lifting container, Deng) running, because electrical motor 11 rotor rated voltages are different because of model and producer, therefore require the output rated voltage of rotor frequency modulation pressure regulating apparatus 1 to be complementary, adopt the scheme of low-voltage variable frequency to solve the problem that high voltage converter could solve with the rated voltage of electrical motor 11 rotors.
The process control part mainly is made up of main control PLC (Programmable Logic Controller) 3 and auxilliary control PLC 4, main control PLC 3, auxilliary control PLC4, carry out data exchange by network or point-to-point communication mode between man-machine interface 5 and the rotor frequency modulation pressure regulating apparatus 1, controlled and detecting element is (as the Oil pump electrical machinery in the Hydraulic Station in main control PLC 3 and the gig 12, electromagnetic valve, brake shoe switch on the hydraulic brake etc.) pass through cable connection, main control PLC 3 is quickened mine hoist by the control of controlled member in rotor frequency modulation pressure regulating apparatus 1 and the gig 12 is finished, constant speed, slow down, the operational process control of creeping and stopping, in this process, auxilliary control PLC4 finishes correctness and accuracy that main control PLC 3 is carried out and monitors, realize the two-wire pattern of mine hoist system control, guarantee the safe reliability of gig operation.
The process monitoring part mainly is made up of man-machine interface 5 and chopping machine 6, promoting the driver starts gig by the operator's station in the man-machine interface 5, stop and sudden stop is controlled, and can observe the voltage of key parameters and signal of interest situation such as rotor, electric current, the make-and-break signal of frequency and hoisting speed and safety return circuit etc., host computer in the man-machine interface 5 is finished the real-time demonstration to the key parameters and the signal of interest situation of gig whole service process, real time recording, report form statistics etc., realize the two-wire pattern of mine hoist system monitoring, chopping machine 6 is by the figure of mode to being write down in the host computer of communication, table carries out hard copy (printing), be provided with the communication network interface card in the host computer, mode by network communication is connected with internet 13 and realizes the frequency conversion system of rotor of alternating current mine hoist that the present invention proposes is carried out remote diagnosis and Long-distance Control, improve man-machine communication's performance, reduce the labour intensity that promotes the driver, in view of the above, gig can be realized automatic operating, improves the production efficiency of elevator system.
Degree of depth speed test section mainly by first detecting element 7 that is loaded on gig 12 main-axis ends and second detecting element 8, two groups detect first limit switch 9 and second limit switch 10 that lifting container promoted or transferred the position respectively and form, the signal of first detecting element 7 and second detecting element 8 is connected respectively to the control of formation two-wire pattern among main control PLC 3 and the auxilliary control PLC4; First limit switch 9 and second limit switch 10 are connected in the main control PLC 3 respectively as the lifting container forward lifting of position closed loop control or the actual position signal that oppositely promotes, first detecting element 7, second detecting element 8 and first limit switch 9 or second limit switch 10 are realized the three-way pattern of raised position control, guarantee that gig is by some a deceleration and an accurate stopping, avoid gig overwind trouble to occur, further improve the safety of gig operation.
Please refer to Fig. 1, with the forward lifting is example, the working process of frequency conversion system of rotor of alternating current mine hoist proposed by the invention is described: under the situation that the driving condition satisfies, after main control PLC 3 and auxilliary control PLC4 receive the driving instruction of man-machine interface 5, main control PLC 3 is sent the low speed jerking motion instruction to rotor frequency modulation pressure regulating apparatus 1, gig 12 is under the situation that its hydraulic brake does not declutch, electrical motor 11 rotor currents are set up gradually, when rotor current reaches certain threshold value, hydraulic brake in the main control PLC 3 instruction gigs 12 declutches, at this moment, the reel that electrical motor 11 drives gig 12 makes gig low frequency speed stabilizing creep, frequency and the voltage exported along with rotor frequency modulation pressure regulating apparatus 1 progressively raise, electrical motor 11 drives gig 12 and quickens, when frequency is raised to rated frequency and voltage and is raised to electrical motor 11 rotor rated voltages, gig is in the operation of constant speed section, in acceleration phase and constant speed stage, electric energy flows to electrical motor 11 from switch cubicle 2 through rotor frequency modulation pressure regulating apparatus 1, electrical motor is in motoring condition, and rotor frequency modulation pressure regulating apparatus 1 is operated in the I quadrant; When lifting container arrives decelerate position, first limit switch 9 sends restriction signal, also send restriction signal by first detecting element 7 and second detecting element 8 respectively by main control PLC 3 and auxilliary control PLC4 simultaneously, realize the three-way pattern of raised position control, comprehensively and to rotor frequency modulation pressure regulating apparatus 1 send restriction signal by main control PLC 3, in moderating process, the frequency of rotor frequency modulation pressure regulating apparatus 1 output, voltage descends gradually, because the effect of the big inertia of elevator system, it is the generating state operation that electrical motor 11 is in supersynchronous speed, electric energy flows to switch cubicle 2 from electrical motor 11 through rotor frequency modulation pressure regulating apparatus 1 and is connected to the grid, moderating process electrical motor 11 is in generating state, rotor frequency modulation pressure regulating apparatus 1 is operated in the II quadrant, entering the low frequency speed stabilizing after slowing down creeps the stage, when lifting container enters between stop place, first detecting element 7 and second detecting element 8 send pre-stop signal by main control PLC 3 and auxilliary control PLC4, rotor frequency modulation pressure regulating apparatus 1 output frequency further reduces, simultaneously, oil pressure in the gig 12 in Hydraulic Station and the hydraulic brake is reduced to and pastes the brake rubber block oil pressure, ready for stopping, when lifting container arrives actual stop position, first limit switch 9 sends the accurate stopping signal, hydraulic brake parking band-type brake and rotor frequency modulation pressure regulating apparatus 1 are out of service in the main control PLC 3 order gigs 12, guarantee the lifting container accurate stopping, so far, mine hoist is finished the process that a forward promotes.Oppositely lifting process is as the same, quickens and the constant speed section, and electrical motor 11 is in motoring condition, and rotor frequency modulation pressure regulating apparatus is operated in the III quadrant, and in the decelerating phase, electrical motor 11 is in generating state, and rotor frequency modulation pressure regulating apparatus is operated in the IV quadrant.Therefore, the frequency conversion system of rotor of alternating current mine hoist that the present invention proposes has the function of four quadrant running, is suitable for the working condition requirement of mine hoist operation.Transfer or bear in the power moderating process at the gig weight, electrical motor 11 is in generating state, and the frequency conversion system of rotor of alternating current mine hoist that the present invention proposes can change into potential energy or potential energy electric energy and feed back in the electrical network and go.

Claims (2)

1. frequency conversion system of rotor of alternating current mine hoist, it is characterized in that: the rotor frequency conversion speed-adjusting part by motor rotor winding, rotor frequency modulation pressure regulating apparatus (1) and switch cubicle (2) are formed provides the ac power power supply of frequency and voltage variable for promoting electrical motor; The input end of rotor frequency modulation pressure regulating apparatus (1) is received the mouth of switch cubicle (2), and the input end of switch cubicle is received on the electrical network; By main control PLC (3) and auxilliary control PLC (4) anabolic process control part, to gig whole service process---acceleration, constant speed, slow down, creep and parking is controlled; By man-machine interface (5) is operator's station, host computer and chopping machine (6) anabolic process monitor portion, gig whole service process is monitored, by the operator's station in the man-machine interface gig is started, stop and sudden stop is controlled, and can observe the voltage of key parameters and signal of interest situation such as rotor, electric current, the make-and-break signal of frequency and hoisting speed and safety return circuit, host computer in the man-machine interface is finished the real-time demonstration to the key parameters and the signal of interest situation of gig whole service process, real time recording, report form statistics, operator's station and host computer realize the two-wire pattern of mine hoist system monitoring jointly; Chopping machine (6) carries out hard copy or printing by the mode of communication to figure, the table that is write down in the host computer; Be provided with the communication network interface card in the host computer, the mode by network communication is connected with the internet and realizes described frequency conversion system of rotor of alternating current mine hoist is carried out remote diagnosis and Long-distance Control; By first detecting element (7) that is loaded on the main shaft of hoister axle head, second detecting element (8) be loaded on that first limit switch (9), second limit switch (10) in the pit shaft formed degree of depth speed test section and for control part provides the real-time degree of depth of lifting container and speed signal, the signal of described first detecting element (7), second detecting element (8) is connected respectively to the control that forms the two-wire pattern among main control PLC (3) and the auxilliary control PLC (4); First limit switch (9), second limit switch (10) are connected in the main control PLC (3) respectively as the lifting container forward lifting of position closed loop control or the actual position signal that oppositely promotes, first detecting element (7), second detecting element (8) and first limit switch (9) or second limit switch (10) are realized the three-way pattern of raised position control, guarantee the safe operation of gig (12); Carry out data exchange by network or point-to-point communication mode between main control PLC (3), auxilliary control PLC (4), man-machine interface (5) and the rotor frequency modulation pressure regulating apparatus (1); Controlled and detecting element passes through cable connection in main control PLC (3) and the gig, main control PLC (3) is by finishing the control of controlled member in rotor frequency modulation pressure regulating apparatus (1) and the gig mine hoist acceleration, constant speed, the operational process control of slowing down, creeping and stopping, in this process, auxilliary control PLC (4) finishes correctness and accuracy that main control PLC (3) is carried out and monitors, and main control PLC and auxilliary control PLC realize the two-wire pattern of mine hoist system control jointly.
2. frequency conversion system of rotor of alternating current mine hoist according to claim 1 is characterized in that: the specified input voltage of rotor frequency modulation pressure regulating apparatus is 380V or 660V or 1140V or 3KV or 6KV or 10KV; The output rated voltage of rotor frequency modulation pressure regulating apparatus is complementary with the motor rotor rated voltage of being controlled, and the mouth of rotor frequency modulation pressure regulating apparatus (1) and the armature loop of electrical motor join, and the stator winding of electrical motor carries out short circuit at its outlet terminal place.
CN2010101463318A 2010-04-14 2010-04-14 Frequency conversion system of rotor of alternating current mine hoist Active CN101817473B (en)

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CN105302052B (en) * 2015-10-10 2017-10-03 中信重工开诚智能装备有限公司 A kind of mining elevator electric control gear system and control method
CN110719051A (en) * 2019-07-12 2020-01-21 淮北矿业股份有限公司 Double-machine dragging large-power stepless speed regulating device for mine hoist
CN112441488A (en) * 2020-11-24 2021-03-05 新巴尔虎右旗荣达矿业有限责任公司 Elevator operation control device of multi-level friction lifting system

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JPH0559673B2 (en) * 1984-02-24 1993-08-31 Meidensha Electric Mfg Co Ltd
CN100384082C (en) * 2005-11-09 2008-04-23 杨玉华 Method and apparatus for controlling AC induction motor energy-saving operation
CN200943011Y (en) * 2006-08-15 2007-09-05 唐山开诚电器有限责任公司 PLC programmable main well lifting signal automatic quantitative loading-unloading integrated control system
HU226986B1 (en) * 2006-12-07 2010-04-28 Laszlo Glocz Method and control unit for equipment using electrical energy
CN101353130B (en) * 2008-09-16 2010-10-06 洛阳源创电气有限公司 AC mine winder rotor frequency modulation pressure regulating apparatus

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