CN201976065U - Frequency conversion system of AC mine hoist rotor - Google Patents
Frequency conversion system of AC mine hoist rotor Download PDFInfo
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- CN201976065U CN201976065U CN2010201584093U CN201020158409U CN201976065U CN 201976065 U CN201976065 U CN 201976065U CN 2010201584093 U CN2010201584093 U CN 2010201584093U CN 201020158409 U CN201020158409 U CN 201020158409U CN 201976065 U CN201976065 U CN 201976065U
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Abstract
The utility model mainly presents a frequency conversion system of an AC mine hoist rotor. A part for frequency conversion and speed regulation of the rotor is composed of a motor rotor winding, an apparatus(1)for frequency modulation and pressure regulation of the rotor, and a switch cabinet (2). A process control part is composed of a master control PLC (3) and an auxiliary control PLC (4). A mine hoist two-line system monitoring is jointly realized by an operating console and a host computer. A depth and speed detection part is composed of a first velocity measurement component (7) and a second velocity measurement component (8) arranged on a shaft end of a main shaft of the hoist and a first limit switch (9) or a second limit switch (10) arranged in a mineshaft; and a three-line hoist position control is realized. Data exchange is carried out through network or a point-to-point communication mode, among the master control PLC, the auxiliary control PLC, the operating console, the host computer, and the apparatus for frequency modulation and pressure regulation of the rotor. The master control PLC is connected with controlled and detection components of the hoist (12) through cables. The utility model makes the hoist operate in a more stable, secure, and reliable manner, to realize the purposes of saving energy and improving operational performance, safety and reliability.
Description
Technical field
The utility model belongs to the mine hoist frequency conversion control technique, mainly proposes a kind of frequency conversion system of rotor of alternating current mine hoist.
Background technology
At present, known ac elevator speed governing is to be undertaken by the metallic resistance 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, elevator quickens, and after all resistance cut, elevator moved with normal speed; In the decelerating phase, drop into electric braking electric current (low-frequency current or direct 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 resistance of needs tens casees even case more than 200, and floor space is big; 2) quicken at elevator, 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 motor exists the frequent contact commutation being arranged and throw stalling current to switch, and equipment dependability is not high.
The mode of speed regulation 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 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 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 supply power 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 motor does not have unified standard (for the motor of different model different manufacturers, the rated voltage of its rotor winding 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 utility model proposes a kind of frequency conversion system of rotor of alternating current mine hoist, make the elevator operation more steadily with safe and reliable, the purpose that reach energy-conservation, improves runnability and security reliability.
The utility model takes following technical scheme to finish its goal of the invention: the 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 motor; The input of rotor frequency modulation pressure regulating apparatus is received the output of switch cubicle, and the input of switch cubicle is received on the electrical network; By main control PLC and auxilliary control PLC anabolic process control section; Form the process monitoring part by operating desk, host computer and printer, elevator whole service process is monitored; Operating desk and host computer are realized the two-wire pattern of mine hoist system monitoring jointly; Printer 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 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 provided the real-time degree of depth of hoisting container and rate signal for control section; 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 or second limit switch are connected in the main control PLC respectively as the hoisting 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, second limit switch are realized the three-way pattern of raised position control; Carry out exchanges data by network or point-to-point communication mode between main control PLC, auxilliary control PLC, operating desk, host computer and the rotor frequency modulation pressure regulating apparatus; Controlled and detecting element is connected by cable in main control PLC and the elevator; Main control PLC and auxilliary control PLC realize the two-wire pattern of mine hoist system control jointly.
The frequency conversion system of rotor of alternating current mine hoist that the utility model proposes makes the elevator operation more steadily with safe and reliable, both also be applicable to the technological transformation of old equipment applicable to the new equipment type selecting, the purpose that reach energy-conservation, improves runnability and security reliability has practical value.
Description of drawings
Fig. 1 is an electric theory diagram of the present utility model.
Among the figure, 1. rotor frequency modulation pressure regulating apparatus, 2. switch cubicle, 3. main control PLC, 4. auxilliary control PLC, 5. man-machine interface, 6. printer, 7. first detecting element, 8. second detecting element, 9. first limit switch, 10. second limit switch, 11. motor, 12. elevators, 13. internet network.
Embodiment
In conjunction with the accompanying drawings the utility model embodiment is illustrated:
In Fig. 1, the frequency conversion system of rotor of alternating current mine hoist that the utility model 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 motor 11 are formed, (with reference to application for a patent for invention number: output 200810141371.6) and motor 11 rotor windings join rotor frequency modulation pressure regulating apparatus 1, the stator winding of motor 11 is at its lead-out terminal place short circuit, the input of rotor frequency modulation pressure regulating apparatus 1 is received the output of switch cubicle 2, the input 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 motor 11, motor 11 drives elevator 12 by mechanical axis and (contains: decelerator, reel, hydraulic brake, Hydraulic Station, hoisting container, Deng) running, because 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 with the rated voltage of 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 exchanges data 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 elevator, electromagnetically operated valve, brake shoe switch on the hydraulic brake etc.) connect by cable, main control PLC 3 is quickened mine hoist by the control of controlled member in rotor frequency modulation pressure regulating apparatus 1 and the elevator 12 is finished, constant speed, slow down, the running 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, and realizes the two-wire pattern of mine hoist system control.
The process monitoring part mainly is made up of man-machine interface 5 and printer 6, promoting the driver starts elevator by the operating desk in the man-machine interface 5, stop and stopping in emergency controlling, 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 velocity 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 elevator whole service process, real time record, report form statistics etc., realize the two-wire pattern of mine hoist system monitoring, printer 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, the mode by network communication is connected with internet 13 and realizes the frequency conversion system of rotor of alternating current mine hoist that the utility model proposes is carried out remote diagnosis and Long-distance Control.
Degree of depth speed test section mainly is made up of first detecting element 7 that is loaded on elevator 12 main-axis ends and second detecting element 8, first limit switch 9 and second limit switch 10, and the signal of first detecting element 7 and 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 PLC4; First limit switch 9 and second limit switch 10 are connected in the main control PLC 3 respectively as the hoisting 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 elevator.
Please refer to Fig. 1, with the forward lifting is example, the course of work of the frequency conversion system of rotor of alternating current mine hoist that the utility model proposes 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, elevator 12 is under the situation that its hydraulic brake does not declutch, motor 11 rotor currents are set up gradually, when rotor current reaches certain threshold value, hydraulic brake in the main control PLC 3 instruction elevators 12 declutches, at this moment, the reel that motor 11 drives elevator 12 makes elevator low frequency speed stabilizing creep, frequency and the voltage exported along with rotor frequency modulation pressure regulating apparatus 1 progressively raise, motor 11 drives elevator 12 and quickens, when frequency is raised to rated frequency and voltage and is raised to motor 11 rotor rated voltages, elevator is in the operation of constant speed section, in boost phase and constant speed stage, electric energy flows to motor 11 from switch cubicle 2 through rotor frequency modulation pressure regulating apparatus 1, motor is in motoring condition, and rotor frequency modulation pressure regulating apparatus 1 is operated in the I quadrant; When hoisting container arrives decelerate position, first limit switch 9 sends reduce-speed sign, also send reduce-speed sign 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 reduce-speed sign 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 motor 11 is in supersynchronous speed, electric energy flows to switch cubicle 2 from motor 11 through rotor frequency modulation pressure regulating apparatus 1 and is connected to the grid, moderating process 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 hoisting container enters between the parking area, first detecting element 7 and second detecting element 8 send pre-stop sign 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 elevator 12 in Hydraulic Station and the hydraulic brake is reduced to and pastes the brake rubber block oil pressure, ready for stopping, when hoisting container arrives actual parking spot, 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 elevators 12, guarantee the hoisting 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 motor 11 is in motoring condition, and rotor frequency modulation pressure regulating apparatus is operated in the III quadrant, and in the decelerating phase, 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 utility model 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 elevator weight, motor 11 is in generating state, and the frequency conversion system of rotor of alternating current mine hoist that the utility model 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: form the rotor frequency conversion speed-adjusting part by motor rotor winding, rotor frequency modulation pressure regulating apparatus (1) and switch cubicle (2), the input of rotor frequency modulation pressure regulating apparatus (1) is received the output of switch cubicle (2), and the input of described switch cubicle (2) is received on the electrical network; By main control PLC (3) and auxilliary control PLC (4) anabolic process control section; By operating desk, host computer and printer (6) anabolic process monitor portion, operating desk and host computer are realized the two-wire pattern of mine hoist system monitoring jointly; 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 elevator (12) main-axis end, second detecting element (8) be loaded on first limit switch (9) in the pit shaft or second limit switch (10) is formed degree of depth speed test section and provided the real-time degree of depth of hoisting container and rate signal for control section; 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 hoisting 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; Carry out exchanges data by network or point-to-point communication mode between main control PLC (3), auxilliary control PLC (4), operating desk, host computer and the rotor frequency modulation pressure regulating apparatus (1); Controlled and detecting element is connected by cable in main control PLC (3) and the elevator, 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 output of rotor frequency modulation pressure regulating apparatus (1) and the rotor winding of motor join, and the stator winding of motor carries out short circuit at its outlet terminal place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201584093U CN201976065U (en) | 2010-04-14 | 2010-04-14 | Frequency conversion system of AC mine hoist rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201584093U CN201976065U (en) | 2010-04-14 | 2010-04-14 | Frequency conversion system of AC mine hoist rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201976065U true CN201976065U (en) | 2011-09-14 |
Family
ID=44581164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201584093U Expired - Fee Related CN201976065U (en) | 2010-04-14 | 2010-04-14 | Frequency conversion system of AC mine hoist rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201976065U (en) |
-
2010
- 2010-04-14 CN CN2010201584093U patent/CN201976065U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110914 Termination date: 20180414 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |