CN101525107A - Frequency hoisting control system - Google Patents

Frequency hoisting control system Download PDF

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Publication number
CN101525107A
CN101525107A CN200910106209A CN200910106209A CN101525107A CN 101525107 A CN101525107 A CN 101525107A CN 200910106209 A CN200910106209 A CN 200910106209A CN 200910106209 A CN200910106209 A CN 200910106209A CN 101525107 A CN101525107 A CN 101525107A
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China
Prior art keywords
control
frequency
hoisting
motor
dragging
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Granted
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CN200910106209A
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Chinese (zh)
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CN101525107B (en
Inventor
陶文亮
黄学诚
杨先友
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KEMRON ELECTRICS TECHNOLOGY Co Ltd
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KEMRON ELECTRICS TECHNOLOGY Co Ltd
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Priority to CN2009101062095A priority Critical patent/CN101525107B/en
Publication of CN101525107A publication Critical patent/CN101525107A/en
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Abstract

A frequency hoisting control system comprises a frequency converter, a hoisting mechanism, a braking system and a hoisting drive system; wherein, the hoisting drive system comprises a generator system. The frequency hoisting control system is characterized in that the frequency hoisting control system comprises one frequency converter which is connected with the generator system of the hoisting drive system via an automatic motor switching controller. The invention has the following beneficial effects: 1. a plurality of sets of drive systems are controlled by one frequency converter, thus lowering the whole cost; 2. three phase asynchronous motors replace series resistance winding motors, thus eliminating frequent failures happening to electric brushes and slip rings; 3. the motors can hold brake under the condition of stopping due to zero-speed running, therefore, the wear of brake shoes are greatly improved; 4. the failure rate of the control system is low, therefore, the reliability is greatly enhanced; 5. the energy-saving effect is good.

Description

Frequency hoisting control system
Technical field
The present invention relates to a kind of hoisting control system, specifically refer to control system with the multiple electric motors in the Frequency Converter Control weight-lifting equipment.
Background technology
The hoist mechanism of tackling system comprises laterally, vertically and move up and down three component parts, use its motion of electric machine control separately respectively.At present, the general-duty hoisting control system is a rotor resistance control tackling system, has following problem:
1, owing to adopt the method speed governing of rotor crosstalk resistance, mechanical vibration are big, and driving is unstable, location difficulty, and the grab bucket swing is serious, causes the damage of mechanical equipment easily.Rotating speed is with load variations, the speed governing weak effect, and institute's crosstalk resistance makes power consumption bigger because of generating heat for a long time, and efficient is lower.
2, the suspension hook dragging system adopts coiling electric motor, and it is overheated that carbon brush serious wear, motor and rotor winding often take place, and causes maintenance big.In addition, when the operator located at hoisting heavy, often reverse-starting braking operation made motor produce the overload phenomenon, influences the service life of motor.
3, the close together of lifting carrying work, motor is in frequent starting, speed change and halted state, and the time relay and the AC contactor of control motor are in the frequent movement state, and old system motor moment impact electric current is big, and electric elements damages easily.
4, when lifting this rising of thing and decline, be difficult to guarantee that halliard is evenly stressed with the switching rope, have a strong impact on the service life of steel rope.
Use Frequency Converter Control can avoid the deficiency of above appearance, but existing variable frequency control is used is that the mode of one group of motor of a Frequency Converter Control is moved, tackling system comprises laterally, vertically and move up and down three groups of motors, need to use three frequency converters, strengthened manufacturing cost.
Summary of the invention
The objective of the invention is at the above problem, the technology of a Frequency Converter Control tackling system of a kind of use is provided.
This frequency hoisting control system, comprise frequency converter, hoist mechanism, brake system and lifting dragging system, wherein the lifting dragging system includes group of motors, it is characterized in that: described frequency converter is one, and frequency converter also is connected with the group of motors of lifting dragging system by motor automatic switchover controller.
Can also reach purpose of the present invention by following measure:
The lifting dragging system comprises weighing system and dragging system, and wherein dragging system comprises cart dragging system, the dolly dragging system that a vehicle motor is housed that two cargo motors are housed and the main hook motor is housed and the suspension hook dragging system of auxiliary hook motor.
Use the following beneficial effect that has of the present invention:
1, organizes the shared Frequency Converter Control of dragging system more, adopt controller to automatically switch and connect motor.Owing to replaced the sub-resistance coiling electric motor of string with general three phase asynchronous motor, reduced the complete machine cost of equipment, greatly improved the competitive power of complete machine.
2, behind many motor parallels, the automatic identified parameters of frequency converter, the automatic switchover controlled variable, control accuracy is very high.Owing to replaced the sub-resistance coiling electric motor of string with three phase asynchronous motor, eliminated the fault that brush and slip ring often have.
3, adopt frequency control after, carry out band-type brake under the situation that motor can the zero-speed operation stops, the wear pattern of brake rubber block will be greatly improved.
4, the fault rate of control system is low.Former control system is to be controlled by the contactless switch of complexity, relay system, the fault rate height, and after the employing frequency converter timing system, control system is simplified, and reliability greatly improves.
5, good energy-conserving effect.Go here and there sub-resistance coiling electric motor when low cruise, and a large amount of electric energy of outer meeting resistance consumption of rotor loop behind the employing frequency conversion speed-adjusting system, can be saved a large amount of electric energy that outer meeting resistance consumes.
Description of drawings
Fig. 1 is a frequency hoisting control system functional-block diagram of the present invention;
Fig. 2 is that the special-purpose frequency conversion system main portion of lifting is formed block scheme;
Fig. 3 is that electrical motor automatic switchover controller is formed block scheme;
Fig. 4 is a frequency hoisting control system circuit diagram of the present invention.
The specific embodiment
The present invention is specified with embodiment below in conjunction with accompanying drawing:
As Fig. 1, shown in Figure 4, this frequency hoisting control system is the same with existing tackling system, comprise frequency converter 10, hoist mechanism 60, brake system 30 and lifting dragging system 40, wherein the lifting dragging system includes group of motors, the difference part is, frequency converter 10 has only one, and frequency converter is connected with the group of motors of lifting dragging system 40 by motor automatic switchover controller 50.Motor automatic switchover controller 50 is that any the switching with being connected of frequency converter of many groups motor of Frequency Converter Control moves electric system.Hoist mechanism 60 is made up of operating unit commonly used and crane span structure and mechanical hatching gate (electromagnetic brake) mechanism.Lifting dragging system 40 is made up of a weighing system 41 and three essentially independent dragging systems, promptly comprise the cart dragging system 42 that two cargo motors are housed, the dolly dragging system 43 and the suspension hook dragging system 44 that main hook motor and auxiliary hook motor are housed of a vehicle motor are housed, cart dragging system 42 drags whole hoisting crane and does " laterally " motion (with operator's seat to being as the criterion) along the workshop, cart dragging system 42 is drawn by two 9KW three phase asynchronous motores, dolly dragging system 43 drags suspension hook and weight is done " vertically " motion along crane span structure, dolly dragging system 43 is drawn by a 4KW three phase asynchronous motor, and the up-and-down movement that suspension hook dragging system 44 pulling weights are sling or put down, suspension hook dragging system 44 is made up of main hook and auxiliary hook again, drive by two three phase asynchronous motores, a driven by motor main hook, a driven by motor auxiliary hook.Brake system is made up of brake unit and braking resistor.This tackling system control accuracy height, exactly when playing the heavy articles operation, mechanical wear little (comparing string sub-motor tackling system), cost low (many three phase asynchronous motores of a Frequency Converter Control), the stepless time adjustment energy-conserving and environment-protective are worthy to be popularized.Utilization lifting special converter is compared string sub-motor tackling system, and have the following advantages: 1, low-frequency start moment is big; 2, zero-speed locking function; 3, superpower overload capacity, frequency conversion overload capacity is more than three times; 4, stopping speed is fast, can realize quick parking; 5, antijamming capability is strong, stable and reliable operation.Utilization motor automatic switchover controller, its advantage is: 1, can automatically switch to the motor that will operate after the motor switching command provides, operate any one dragging system; 2, can after providing, the motor switching command automatically switch to electromechanics band-type brake (electromagnetic brake) system of being mated; 3, can carry out communication with frequency converter, the situation of monitoring frequency converter; 4, can carry out communication with frequency converter, the operation of control frequency converter, stop and resetting; 5, can realize lifting operator's compartment operation, terrestrial operation or shake the control operating electrical machines operation, stop and motor and frequency conversion disconnection.
Fig. 2, shown in Figure 4 for another example, R, S, T three phase mains 11 are the connection terminal part of inverter supply; Rectifying part 12 is made up of a three-phase commutation bridge or three two pipe dress rectifier bridges, for alternating current being transformed into the straight-though power electronic equipment, its input voltage is a sinusoidal waveform, the received current non-sine, have abundant harmonic wave, rectifying part 12 is connected with R, S, T three phase mains 11 and filtering part 13; Filtering part 13 reduces the chemical capacitor of mains ripple for keeping DC bus-bar voltage constant, and filtering part 13 is connected with Switching Power Supply part 16; Switching Power Supply part 16 is the switch circuit of the output multichannel insulating power supply be made up of switch transformer, switching valve, IC3842 and peripheral circuit thereof; 13 of Switching Power Supply part 16 and filtering parts are connected with power on rectification charging part 14 and charge protection control part 15; The electronic switch that the rectification charging that powers on part 14 is isolated by one or more current-limiting resistances and contactless switch or high pressure is formed, act as the reduction power-on impact current, power on and finish the automatic adhesive of back contactless switch, or electronic switch closes, the impact of big electric current to chemical capacitor do not appear with protection; Filtering part 13 also is connected with inversion drive part 17, inversion drive part 17 is that the high speed photo coupling HCPL3120 that isolated by photoelectricity or HCPL316J and peripheral circuit thereof and power pack are formed, simultaneously, inversion drive part 17 also is connected with inversion part 18, Switching Power Supply part 16 and CPU control part 19; Inversion part 18 is made up of the electronic switching element IGBT and the peripheral circuit thereof of three two pipe dresses, act as vdc is converted to all variable alternating current of voltage to frequency, exports no phase sequence requirement; Inversion part 18 is connected with current sense test section 21, brake portion 22 by motor load terminal part 20; Current sense test section 21 is made up of the Hall current sensor and the peripheral circuit thereof of two height voltage isolation, its effect is the current signal size with loading section, convert the little curtage signal of low pressure and isolation to, allow 19 pairs of loads of CPU control part discern, so that load is controlled; Brake portion 22 is made up of an electronic switching element IGBT and peripheral circuit thereof, and its effect is to consume too much feedback energy, keeps DC bus-bar voltage to be no more than the electronic component of maxim protection load and work; CPU control part 19 is by a slice printer Fujisu (CPU), model is that MB90F462 and peripheral circuit thereof are formed, CPU control part 19 is connected with external motor automatic switchover controller 50, and CPU control part 19 also is connected with temperature detection part 23, fan radiator portion 24 simultaneously; Temperature detection part 23 is made up of a temp probe and peripheral circuit thereof, and its effect is to be the low voltage signal of linear change with the temperature transition on the radiator, allows cpu controller 19 that it is discerned, to do overheating protection, with the protection electronic component; Fan radiator portion 24 is that the fan of three direct current 24V work is formed with the peripheral circuit of controlling fan running or stopping.
Electrical motor automatic switchover controller 50 be many groups motor of Frequency Converter Control switch arbitrarily with frequency converter be connected the operation electric system, comprise the operation of lifting control cabin, terrestrial operation, shake control operation and the connection of conversion motor with contactless switch or electronic switch.As shown in Figure 3, Figure 4, electrical motor automatic switchover controller 50 is divided into 2 parts again, first is that rectifying and wave-filtering 52 connects 220V source of AC 51 and is connected with Switching Power Supply part 53, and Switching Power Supply part 53 is connected Switching Power Supply with the display part 54 of weighing and is made up of the regular tap power supply; The display part 54 of weighing is made up of four eight sections charactrons and a slice micro controller system and peripheral circuit thereof, and its effect is that voltage or current signal after the LOAD CELLS conversion are shown, and allows operating personal discern playing a weight of heavy.Second portion is an each several part below CPU control part 19 bonded assemblys: hoist mechanism operator's compartment 55, to form by an operator's compartment and some electric operation switches and operating handle, and its effect is to allow operating personal in operator's compartment weight-lifting equipment be operated; Hoist mechanism terrestrial operation part 56 is made up of a terrestrial operation controller and some external equipment thereof, and its effect is to allow operating personal on ground, at operator's compartment weight-lifting equipment is not operated; Hoist mechanism shakes control function part 57, shakes control operation control and some external equipment thereof by one and forms, and its effect is to allow operating personal on ground, without connection line weight-lifting equipment is operated; Monitoring display part 58 is made up of one 240 * 128 LCD MODULE and peripheral circuit thereof, and its effect is to show the running condition of weight-lifting equipment and failure condition etc., so that the staff monitors the weight-lifting equipment situation; Motor automaticallyes switch, contactless switch conversion portion 59, is made up of eight contactless switchs and some middle controllers, carries out work so that operating personal switches to the motor that will work; CPU control part 19 also is connected with bridge motor special converter 10.
Among the present invention, a lifting special converter is controlled multiple electric motors and is realized automatic switchover, and safe and reliable, with low cost, the control accuracy height has a lot of advantages in the Industry Control, is worth society generalization to use.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, its framework form can be flexible and changeable, can the subseries product.Just make some simple deduction or replace, all should be considered as belonging to the scope of patent protection that the present invention is determined by claims of being submitted to.

Claims (2)

1, a kind of frequency hoisting control system, comprise frequency converter, hoist mechanism, brake system and lifting dragging system, wherein the lifting dragging system includes group of motors, it is characterized in that: described frequency converter is one, and frequency converter also is connected with the group of motors of lifting dragging system by motor automatic switchover controller.
2, frequency hoisting control system according to claim 1, it is characterized in that: described lifting dragging system comprises weighing system and dragging system, and wherein dragging system comprises cart dragging system, the dolly dragging system that a vehicle motor is housed that two cargo motors are housed and the main hook motor is housed and the suspension hook dragging system of auxiliary hook motor.
CN2009101062095A 2009-03-20 2009-03-20 Frequency hoisting control system Active CN101525107B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103863957A (en) * 2013-12-31 2014-06-18 三一汽车起重机械有限公司 Auxiliary arm forming mode identification method and system and engineering machinery
CN108238547A (en) * 2017-12-08 2018-07-03 中冶南方(武汉)自动化有限公司 Hook control method is slipped in the anti-load of lifting frequency converter
CN109132871A (en) * 2018-11-09 2019-01-04 三门正乐电气有限公司 A kind of overhead and gantry cranes frequency-variable controller
CN110294416A (en) * 2019-06-24 2019-10-01 中铁十二局集团有限公司 Workshop mono beam overhead crane in bridge type control method and device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103863957A (en) * 2013-12-31 2014-06-18 三一汽车起重机械有限公司 Auxiliary arm forming mode identification method and system and engineering machinery
CN103863957B (en) * 2013-12-31 2016-05-11 三一汽车起重机械有限公司 The recognition methods of auxiliary building form and system and engineering machinery
CN108238547A (en) * 2017-12-08 2018-07-03 中冶南方(武汉)自动化有限公司 Hook control method is slipped in the anti-load of lifting frequency converter
CN108238547B (en) * 2017-12-08 2019-05-17 中冶南方(武汉)自动化有限公司 Hook control method is slipped in the anti-load of lifting frequency converter
CN109132871A (en) * 2018-11-09 2019-01-04 三门正乐电气有限公司 A kind of overhead and gantry cranes frequency-variable controller
CN110294416A (en) * 2019-06-24 2019-10-01 中铁十二局集团有限公司 Workshop mono beam overhead crane in bridge type control method and device
CN110294416B (en) * 2019-06-24 2021-08-06 中铁十二局集团有限公司 Workshop single-beam traveling control method and device

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