CN103475299A - Alternating-current crane rotor thyristor speed regulating controller - Google Patents
Alternating-current crane rotor thyristor speed regulating controller Download PDFInfo
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- CN103475299A CN103475299A CN2013104022984A CN201310402298A CN103475299A CN 103475299 A CN103475299 A CN 103475299A CN 2013104022984 A CN2013104022984 A CN 2013104022984A CN 201310402298 A CN201310402298 A CN 201310402298A CN 103475299 A CN103475299 A CN 103475299A
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- thyristor
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- crane
- rotor
- speed setting
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Abstract
Disclosed is an alternating-current crane rotor thyristor speed regulating controller. The alternating-current crane rotor thyristor speed regulating controller is composed of a control unit and a power unit. The control unit and the power unit are fixed to be a whole, and the control unit and the power unit are electrically connected through a connector. The control unit is composed of a plurality of circuit boards, a display panel and a base plate. A control plate is connected with the base plate through a connector. The power unit is composed of a thyristor assembly, a fan assembly, a protection circuit assembly and a quick fuse. The control unit is sealed, and the control plate is sprayed with an insulation anti-corrosion layer. The control unit is connected with the thyristor power unit through a connector. The alternating-current crane rotor thyristor speed regulating controller has the advantages of being high in reliability, high in safety, strong in anti-interference capacity, simple and easy to use, reasonable in mechanism, large in capacity range and the like, is applicable to a crane lifting mechanism, a horizontal moving mechanism, a rotation mechanism, a luffing mechanism, a multiple-motor driving mechanism and the like, wherein all the mechanisms are wide in speed regulating range and low in speed change rate and run at a low speed, and is particularly applicable to high-reliability and continuous-operation occasions of a metallurgy crane.
Description
Technical field
The present invention relates to a kind of speed regulating control apparatus, especially a kind of AC crane rotor thyristor speed setting controller.
Background technology
Along with developing rapidly of China's industry, the application of crane in industry is more and more extensive, to the requirement of crane controller also in continuous raising.Especially in energy-intensive today, adopt the crane controller of serial-resistance speed-regulation due under its efficiency, progressively by the stator voltage controlling crane controller based on the variable voltage control principle, replaced.There have been at home a lot of producers can produce stator voltage controlling equipment, but their most of producer wherein adopts foreign technology, the profit of self is not high, and on market, the demand for stator voltage controlling equipment is very large, under such power and pressure, impelled some producers to prepare independent research stator voltage controlling equipment just.
Summary of the invention
In order to solve wound-rotor motor (rotor crosstalk resistance) when starting shock problem to crane, running control circuit for crane undergoes technological transformation, the present invention has adopted advanced cascade speed regulation technology, provide a kind of have high reliability, high security, antijamming capability strong, be simple and easy to the AC crane rotor thyristor speed setting controller by, characteristics such as mechanism is reasonable, range of capacity is large, to seek, efficiency is high, the better governing system of performance.
The technical solution adopted for the present invention to solve the technical problems is:
AC crane rotor thyristor speed setting controller is comprised of control unit and power cell, and both are fixed as one, complete electrical connection by connector therebetween.Described control unit is comprised of polylith wiring board, display floater and base plate.Between control board and base plate, adopt connector to connect.Described power cell is comprised of thyristor assembly, fan assembly, protective circuit assembly, fast acting fuse.Described control unit sealing, control board spraying insulating corrosion layer, can be high temperature resistant, adapts to severe operational environment.Described control unit adopts connector to be connected with thyristor power unit, is convenient to keep in repair dismounting.
AC crane rotor thyristor speed setting controller mechanism is compact, it is reliable to connect, and opens brake after first setting up motor torque during startup, and safety arrestment is guaranteed in the multiple redundancy measure, has various faults self diagnosis and defencive function.
It is full Chinese interface that AC crane rotor thyristor speed setting controller adopts friendly man-machine interface, shows running status, shows and record operation troubles.
AC crane rotor thyristor speed setting controller is taked mechanical braking after first electric braking, accurately controls mechanical braking time, has both shortened braking time, reduces again the wearing and tearing to brake.
AC crane rotor thyristor speed setting controller adopts the rotor frequency feedback, is to feed back the most simply, the most reliably force method.
The input signal of AC crane rotor thyristor speed setting controller is by built-in photoelectricity isolation settling signal isolation conversion, and output signal is isolated the power output signal by photoelectricity.
AC crane rotor thyristor speed setting controller uses traditional mode of speed regulation to control AC Asynchronous motor in conjunction with modern control force method, specific as follows:
Rotor loop resistance device series thyristor, change rotor current by the angle of flow of controlling thyristor, thereby change the torque of motor, reaches the purpose of controlling rotating speed.When power supply 1 adhesive, motor output is only to torque, and during power supply 2 adhesive, motor is exported opposing torque.
Speed preset signal and speed feedback ratio from master controller are output as given value of current than the Negotiation speed adjuster, given value of current and current feedback compare the input signal as current regulator, speed regulator and current regulator form rotating speed, current double closed-loop system is controlled the angle of flow of thyristor by phase shift trigger, reach and control the purpose that rotating speed is controlled motor torque, also realize the control to motor speed.
When main order is placed in speed governing shelves (1～3 grade), motor is in closed-loop working state.When main order is placed in full gear (4 grades), motor enters the operate in open loop state state, two accelerating contactor actions when rotor frequency 25Hz (50% speed) and 12.5Hz (75% speed) respectively, turned the resistance excision by two sections respectively, and motor is accelerated at full speed.The accelerator transfer resistance when switching determined peak current limit in the twice of full-load current.When main order is got back to other grade from full gear, two accelerating contactors discharge at once, and the resistance serial connection has been turned round to loop, and motor reenters closed-loop working state simultaneously.
The key technical indexes of AC crane rotor thyristor speed setting controller is as follows:
1, stator ring current voltage: 3 phase AC380V, 50Hz, voltage allows excursion :-20%～+ 10%, frequency allows excursion: one 1%～+ 1%.Rotor loop is suitable for YZR complete series motor.
2, control supply voltage: AC220V 50Hz voltage allows excursion :-20%～+ 10%, and frequency allows excursion :+1%～-1%.
3, speed governing error: speed governing shelves≤5%.
4, percentage speed variation: speed governing shelves≤5%.
5, current stabilizing factor: >=0.9.
6, degree of protection: control unit IP51, power cell is IP30.
The normal running conditions of AC crane rotor thyristor speed setting controller is as follows:
1, ambient temperature :-25 ℃～+ 55 ℃;
2, height above sea level :≤2000m;
3, relative humidity :≤90%RH;
4, at right angle setting, gradient :≤5.；
5, installation position allows vibration condition: during vibration frequency 5～13Hz, displacement is 1.5mm; During 13～150Hz, vibration acceleration is 1.0g.
AC crane rotor thyristor speed setting controller coordinates with master controller etc., for starting, speed governing, commutation and the braking of control and protection wound-rotor motor.Have high reliability, high security, antijamming capability strong, be simple and easy to by, characteristics such as mechanism is reasonable, range of capacity is large, be suitable for the requirement speed adjustable range wider, momentary speed variation is little, the crane hoisting mechanism of low cruise, translation mechanism, slew gear, jib lubbing mechanism, many motor-driven mechanism etc.Be specially adapted to crane for steelworks use requirement reliability high, pay no attention to the occasion of disconnected operation.
the accompanying drawing explanation:
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is overall diagram of the present invention;
Fig. 2 is System Working Principle figure of the present invention;
Fig. 3 is control principle drawing of the present invention.
In Fig. 3, K11 is that power supply 1, K21 are that power supply 2, ng are that speed preset, nf speed are fed back, f/v is that the voltage to frequency conversion is that current-voltage conversion is that current regulator, MT are phase shift trigger as current feedback link, IA as velocity feedback loop joint, SA speed regulator, Ig given value of current, If current feedback, I/v.
embodiment:
The QRTl series AC crane rotor thyristor speed setting controller of take is example:
As shown in Figure 3, rotor loop resistance device series thyristor, change rotor current by the angle of flow of controlling thyristor, thereby change the torque of motor, reaches the purpose of controlling rotating speed.When the K11 adhesive, motor output is only to torque, motor output opposing torque during the K21 adhesive, in Fig. 3, ng is that speed preset, nf speed are fed back, f/v is that the voltage to frequency conversion is that current-voltage conversion is that current regulator, MT are phase shift trigger as current feedback link, IA as velocity feedback loop joint, SA speed regulator, Ig given value of current, If current feedback, I/v.
Speed preset signal ng and speed feedback nf comparison Negotiation speed adjuster SA from master controller are output as given value of current Ig, given value of current Ig and current feedback If compare the input signal as current regulator IA, speed regulator and current regulator form rotating speed, current double closed-loop system and control the angle of flow of thyristor by phase shift trigger MT, reach and control the H that rotating speed is controlled motor torque, also realize the control to motor speed.
When main order is placed in speed governing shelves (1～3 grade), motor is in closed-loop working state.When main order is placed in full gear (4 grades), motor enters the operate in open loop state state, two accelerating contactor actions when rotor frequency 25Hz (50% speed) and 12.5Hz (75% speed) respectively, turned the resistance excision by two sections respectively, and motor is accelerated at full speed.The accelerator transfer resistance when switching determined peak current limit in the twice of full-load current.When main order is got back to other grade from full gear, two accelerating contactors discharge at once, and the resistance serial connection has been turned round to loop, and motor reenters closed-loop working state simultaneously.
Claims (6)
1. an AC crane rotor thyristor speed setting controller, is characterized in that, it is comprised of control unit and power cell, and both are fixed as one, complete electrical connection by connector therebetween; Mechanism is compact, it is reliable to connect, and opens brake after first setting up motor torque during startup, and safety arrestment is guaranteed in the multiple redundancy measure, has various faults self diagnosis and defencive function; Adopting friendly man-machine interface is full Chinese interface, shows running status, shows and record operation troubles; Take mechanical braking after first electric braking, accurately control mechanical braking time, both shortened braking time, reduce again the wearing and tearing to brake; Employing rotor frequency feedback is to feed back the most simply, the most reliably force method; The input signal of AC crane rotor thyristor speed setting controller is by built-in photoelectricity isolation settling signal isolation conversion, and output signal is isolated the power output signal by photoelectricity.
2. according to the described AC crane rotor of claim l thyristor speed setting controller, it is characterized in that, described control unit is comprised of polylith wiring board, display floater and base plate.
3. according to the described AC crane rotor of claim l thyristor speed setting controller, it is characterized in that, between described control board and base plate, adopt connector to connect.
4. according to the described AC crane rotor of claim l thyristor speed setting controller, it is characterized in that, described power cell is comprised of thyristor assembly, fan assembly, protective circuit assembly, fast acting fuse.
5. according to the described AC crane rotor of claim l thyristor speed setting controller, it is characterized in that described control unit sealing, control board spraying insulating corrosion layer.
6. according to the described AC crane rotor of claim l thyristor speed setting controller, it is characterized in that, described control unit adopts connector to be connected with thyristor power unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104022984A CN103475299A (en) | 2013-09-06 | 2013-09-06 | Alternating-current crane rotor thyristor speed regulating controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104022984A CN103475299A (en) | 2013-09-06 | 2013-09-06 | Alternating-current crane rotor thyristor speed regulating controller |
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| CN103475299A true CN103475299A (en) | 2013-12-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105438992A (en) * | 2016-01-11 | 2016-03-30 | 辽宁国远电子有限公司 | Electrical control system and method for crane |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06153566A (en) * | 1992-11-06 | 1994-05-31 | Ishikawajima Harima Heavy Ind Co Ltd | Speed control device for three-phase induction motor |
| CN201188600Y (en) * | 2008-05-06 | 2009-01-28 | 南京腾飞自动化设备厂 | Contactless speed-adjusting controller for coiling motor rotor |
-
2013
- 2013-09-06 CN CN2013104022984A patent/CN103475299A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06153566A (en) * | 1992-11-06 | 1994-05-31 | Ishikawajima Harima Heavy Ind Co Ltd | Speed control device for three-phase induction motor |
| CN201188600Y (en) * | 2008-05-06 | 2009-01-28 | 南京腾飞自动化设备厂 | Contactless speed-adjusting controller for coiling motor rotor |
Non-Patent Citations (1)
| Title |
|---|
| 百度文库: "《QY2T用户手册_2[1].0》", 7 April 2011, article "QY2T用户手册_2[1].0" * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105438992A (en) * | 2016-01-11 | 2016-03-30 | 辽宁国远电子有限公司 | Electrical control system and method for crane |
| CN105438992B (en) * | 2016-01-11 | 2017-05-31 | 辽宁奥达讯科科技有限公司 | Electrical control system and method for crane |
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Application publication date: 20131225 |