CN203722532U - All-digital alternating current crane rotor thyristor speed regulation controller - Google Patents
All-digital alternating current crane rotor thyristor speed regulation controller Download PDFInfo
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- CN203722532U CN203722532U CN201420020995.3U CN201420020995U CN203722532U CN 203722532 U CN203722532 U CN 203722532U CN 201420020995 U CN201420020995 U CN 201420020995U CN 203722532 U CN203722532 U CN 203722532U
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- thyristor
- rotor
- speed
- crane
- chip microcomputer
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Abstract
The utility model discloses an all-digital alternating current crane rotor thyristor speed regulation controller. An input plate (1), an output plate (2), a single-chip microcomputer (3) and a thyristor trigger plate (4) are inserted into a substrate (8) through a connector assembly. The input plate (1), the output plate (2), the thyristor trigger plate (4) and an operation plate (7) are connected to the single-chip microcomputer (3) respectively. One end of a current sensor (5) is connected with the single-chip microcomputer (3) through a first interface circuit and the other end is connected to a motor rotor. The thyristor trigger plate (4) is connected with a thyristor (6) through a second interface circuit. The thyristor (6) is connected in series with a resistor (9) of an alternating current motor rotor loop. By using the controller of the utility model, through controlling a conduction angle of the thyristor (6), a resistance of the resistor (9) of the rotor loop is changed so that a purpose of controlling a rotating speed of the alternating current motor is achieved. During a whole process, a maximum torque of the alternating current motor is not changed. Safety performance of the crane is guaranteed and safety reliability of the crane is achieved, which is important for the crane.
Description
Technical field
The utility model relates to crane speed regulation control field, in particular to a kind of full digital AC crane rotor thyristor speed setting controller.
Background technology
The scope of silicon controlled crystal brake pipe not conducting under the effect of forward anode voltage is called to pilot angle, represent, and conducting scope is called the angle of flow with alphabetical a, obviously the size of pilot angle a, can change the size that positive-negative half-cycle waveform cuts area.Less when a angle, cut waveform area is less, and the mean value of output AC voltage is larger; On the contrary, larger when a angle, cut waveform area is larger, and the mean value of output AC voltage is less.So on motor stator serial connection controllable silicon thyristor, by controlling the size of pilot angle a, can change the size of motor stator output AC voltage.
At present, the interchange wound-rotor motor stator variable voltage speed control that people conventionally adopt is in rotor, to go here and there fixed resistance, Thyristors in series is in stator loop, by thyristor, regulate stator voltage, reach the object of change speed, when reducing stator voltage speed governing, the breakdown torque of motor becomes square reduction, concerning the crane of carrying weight, because breakdown torque reduces, be that the reliability of the safety of crane reduces by the security performance that makes crane, this is the most fatal for crane.
In order to overcome the defect of the reduction motor breakdown torque that exchanges the existence of wound-rotor motor stator variable voltage speed control method, start to adopt the scheme that exchanges wound-rotor motor rotor crosstalk resistance, the speed governing of shish-kebab brake tube, but all by Analogical Electronics, control realization.Analogical Electronics is controlled and to be had that circuit hardware is complicated, integrated level is low, poor reliability, parameter arrange dumb, use the defects such as inconvenient.
The circuit hardware that exists while control exchanging wound-rotor motor rotor crosstalk resistance, the speed governing of shish-kebab brake tube for Analogical Electronics in prior art is complicated, integrated level is low, poor reliability, parameter arrange dumb, use the problems such as inconvenient, effective solution is not yet proposed at present.
Utility model content
The circuit hardware that exists while control exchanging wound-rotor motor rotor crosstalk resistance, the speed governing of shish-kebab brake tube for Analogical Electronics in prior art is complicated, integrated level is low, poor reliability, parameter arrange dumb, use the problems such as inconvenient, effective solution is not yet proposed at present, for this reason, main purpose of the present utility model is to provide a kind of full digital AC crane rotor thyristor speed setting controller, to address the above problem.
To achieve these goals, according to an aspect of the present utility model, a kind of full digital AC crane rotor thyristor speed setting controller is provided, has comprised: tablet 1, output board 2, single-chip microcomputer 3, thyristor trigger board 4, current sensor 5, thyristor 6, operation panel 7, substrate 8;
Described tablet 1, output board 2, single-chip microcomputer 3, thyristor trigger board 4 are inserted on substrate 8 by connector;
Described tablet 1, output board 2, thyristor trigger board 4, operation panel 7 are connected with single-chip microcomputer 3 respectively;
Described current sensor 5 one end by first interface circuit with single-chip microcomputer 3 by being connected, the other end is connected with motor rotor;
Described thyristor trigger board 4 is connected with thyristor 6 by the second interface circuit;
Described thyristor 6 is connected with the resistor 9 in AC motor rotor loop, for continuously change the resistance of the resistor 9 of rotor loop by changing its angle of flow, realizes and regulates alternating current motor rotating speed.
Further, described speed setting controller also comprises the temperature sensor 10 being arranged on thyristor 6 fin, and described single-chip microcomputer 3 is connected with temperature sensor 10 by interface circuit.
Further, described speed setting controller also comprises resistance-capacitance protection device 11, and described resistance-capacitance protection device 11 one end are connected with the second interface circuit, and the other end is connected with thyristor 6.
Adopt the utility model, described speed setting controller integrated level is high, and volume is little, and reliability is high, and flexible setting for parameters is easy to use.AC motor rotor loop resistance device 9 series thyristors 6, change the resistance of the resistor 9 of rotor loop, and then change AC motor rotor electric current by controlling the angle of flow of thyristor 6, reach the object of controlling alternating current motor rotating speed.In whole process, do not change the breakdown torque of alternating current motor, the security performance that has guaranteed crane is the reliability of the safety of crane, and this is vital for crane.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms the application's a part, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is according to the circuit theory schematic diagram of the full digital AC crane rotor thyristor speed setting controller of the utility model embodiment
Fig. 2 is according to the single-chip microcomputer operation principle schematic block diagram of the full digital AC crane rotor thyristor speed setting controller of the utility model embodiment.
Fig. 3 is the full digital AC crane rotor thyristor speed setting controller speed control principle schematic diagram according to the utility model embodiment;
Wherein, in Fig. 3, NG is the speed preset signal of the given unit of electromotor velocity pre-set velocity set-point output, and IG is given value of current signal, and NF is spinner velocity feedback signal, and IF is rotor current feedback signal, 13-alternating current motor.
Embodiment
It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the utility model in detail.
Fig. 1 is according to the operation principle schematic block diagram of the full digital AC crane rotor thyristor speed setting controller of the utility model embodiment.As shown in Figure 1, this speed setting controller, comprising: tablet 1, output board 2, single-chip microcomputer 3, thyristor trigger board 4, current sensor 5, thyristor 6, operation panel 7, substrate 8;
Described tablet 1, output board 2, single-chip microcomputer 3, thyristor trigger board 4 are inserted on substrate 8 by connector;
Described tablet 1, output board 2, thyristor trigger board 4, operation panel 7 are connected with single-chip microcomputer 3 respectively;
Described current sensor 5 one end by first interface circuit with single-chip microcomputer 3 by being connected, the other end is connected with motor rotor; Described current sensor 5 is for detection of the electric current in motor rotor loop;
Described thyristor trigger board 4 is connected with thyristor 6 by the second interface circuit;
Described thyristor 6 is connected with the resistor 9 in AC motor rotor loop, for continuously change the resistance of the resistor 9 of rotor loop by changing its angle of flow, realizes and regulates alternating current motor rotating speed.
Adopt the utility model, described speed setting controller integrated level is high, and volume is little, and reliability is high, and flexible setting for parameters is easy to use.AC motor rotor loop resistance device 9 series thyristors 6, change the resistance of the resistor 9 of rotor loop, and then change AC motor rotor electric current by controlling the angle of flow of thyristor 6, reach the object of controlling alternating current motor rotating speed.In whole process, do not change the breakdown torque of alternating current motor, the security performance that has guaranteed crane is the reliability of the safety of crane, and this is vital for crane.
According to above-described embodiment of the present utility model, described speed setting controller also comprises the temperature sensor 10 being arranged on thyristor 6 fin, and described single-chip microcomputer 3 is connected with temperature sensor 10 by interface circuit.Described temperature sensor 10, for detection of the temperature of thyristor 6 fin, prevents that thyristor 6 is overheated.
At above-described embodiment of the present utility model, described speed setting controller also comprises resistance-capacitance protection device 11, and described resistance-capacitance protection device 11 one end are connected with the second interface circuit, and the other end is connected with thyristor 6.Described resistance-capacitance protection device 11 is for the protection of thyristor 6.
Full digital AC crane rotor thyristor speed setting controller described in the utility model, described single-chip microcomputer 3 comprises motor rotor speed feedback unit 31, motor rotor current feedback unit 32, speed regulator 33, current regulator 34, the given unit of electromotor velocity;
Described motor rotor speed feedback unit 31 one end are connected with motor rotor, the other end is connected with the given unit of electromotor velocity, the given unit of electromotor velocity is connected with speed regulator 33, speed regulator 33 is connected with current regulator 34, current regulator 34 is connected with thyristor trigger board 4, and thyristor trigger board 4 is connected with thyristor 61;
Described motor rotor speed feedback unit 31, motor rotor current feedback unit 32, speed regulator 33, current regulator 34, the given unit of electromotor velocity are connected with single-chip microcomputer 3.
The given unit of the electromotor velocity pre-set velocity set-point of described single-chip microcomputer 3, with the spinner velocity value comparison of motor rotor speed feedback unit 31 outputs, output speed difference signal;
Described speed difference signal is as the input signal of speed regulator 33, after the PID computing of speed regulator 33, and the given signal of output current;
The rotor current value comparison of described given value of current signal and 32 outputs of motor rotor current feedback unit, output current difference signal;
Described difference between current signal, as the input signal of current regulator 34, after the PID computing of current regulator 34, is carried phase shift triggering signal;
Described phase shift triggering signal is as the input signal of thyristor trigger board 4, thyristor trigger board 4 is transformed into phase shift triggering signal trigger impulse and carries out power amplification, be used for triggering thyristor 6, change the Trigger Angle of thyristor 6, and then resistor 9 resistances of continuous change rotor loop, realize and control electromotor velocity.
Full digital AC crane rotor thyristor speed setting controller described in the utility model, the given unit of described electromotor velocity is mainly to accept outside instruction, sets the speed preset signal of motor, the effect of described motor rotor speed feedback unit 31 is by rotor voltage step-down by resistance reduction voltage loop, then the AC signal of rotor voltage is adjusted into square-wave signal, the cycle of detecting square-wave signal in the method by sense cycle is the cycle of rotor voltage, then square-wave signal is converted to can with the given unit of electromotor velocity in the suitable signal of speed preset signal, poor and change into signal by single-chip microcomputer 3 computational speeds, then speed difference signal is as the input signal of speed regulator 33, described speed regulator 33 comprises comparator, PID arithmetic and control unit, by the given signal of output current after PID computing, described motor rotor current feedback unit 32 is by current sensor 5, to convert the rotor current detecting to weak electric signal, then by single-chip microcomputer 3, calculate the instantaneous signal of rotor current, and with the given value of current signal comparison of speed regulator 33 output, calculate difference between current and change into signal, described difference between current signal is as the input signal of current regulator 34, described current regulator 34 comprises comparator, PID arithmetic and control unit, by exporting phase shift triggering signal after PID computing.
Conventionally the speed control range of motor is at 0-100% synchronous speed, and speed setting controller described in the utility model can carry out speed control more than synchronous speed, within the scope of 0-200% synchronous speed, carries out speed control.
In above-described embodiment of the present utility model, described speed regulating control comprises mechanical interlocking directional contactor 12, be used for controlling the forward and reverse operation of alternating current motor, alternating current motor output forward torque when K11 adhesive, alternating current motor output opposing torque when K12 adhesive; Described mechanical interlocking directional contactor 12 is connected with AC electrical machine stator.
When the master controller of crane is placed in 1 ~ 3 grade of speed governing shelves, motor 13 is in closed-loop working state.When master controller is placed in 4 grades of full gears, motor enters operate in open loop state state, two accelerating contactor braking contactors, rotor contactors move respectively when rotor frequency 25HZ50% speed and 12.5HZ75% speed, by 9 excisions of rotor resistance device, motor 13 is accelerated at full speed respectively.Stator peak current limit when accelerator rotor resistor 9 switches is in the twice of full-load current.When master controller is got back to other grade from full gear, two accelerating contactor braking contactors, rotor contactors discharge at once, and by the 9 serial connection revolution sub-loops of rotor resistance device, motor reenters closed-loop working state simultaneously.
Full digital AC crane rotor thyristor speed setting controller coordinates with master controller etc. hereinafter to be referred as QRT1 speed setting controller; starting, speed governing, commutation and braking for control and protection wound-rotor motor; be suitable for 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, the occasion of uninterrupted operation.Tool has the following advantages: 1, high security: after first setting up motor torque during startup, open brake.Safety arrestment is guaranteed in multiple redundancy measure.Various faults self diagnosis and defencive function; 2, friendly man-machine interface: full Chinese interface.Show running status, show and record operation troubles; 3, superior control performance.Mechanical braking after first electric braking, accurately controls mechanical braking time, has both shortened braking time, reduces again the wearing and tearing to brake; 4 rotor frequencies feedbacks: be the most simply, the most reliable feedback method; 5, antijamming capability is strong: input signal is by built-in photoelectricity isolation settling signal isolation conversion, and output signal is isolated power output signal by photoelectricity; 6, built-in semiconductor protection fuse: effectively protect power device; 7, be simple and easy to use: quick and easy for installation.Parameter is optimized through special, and field adjustable is simple; 8, rational in infrastructure: control unit adopts connector to be connected with thyristor 6 power cells, is convenient to keep in repair dismounting; 9, range of capacity is large: optional capacity 15A～3000A.
The key technical indexes of full digital AC crane rotor thyristor speed setting controller:
1, stator ring current voltage: 3 phase AC380V, 50Hz, voltage allows excursion :-20%～+ 10%, frequency allows excursion :-1%～+ 1%.Rotor loop is suitable for YZR complete series motor;
2, control supply voltage: AC220V 50Hz voltage allows excursion :-20%～+ 10%, 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.
7, major protective function: 1., power faiture safe: power supply dead electricity, phase shortage.2., motor overload, phase shortage; 3., rotor three-phase unbalance protection; 4., thyristor 6 overtemperature protections; 5., without speed feedback protection; 6., no current feedback protection; 7., advance stall protection is only for lifting type; 8., decline overspeed protection is only for lifting type; 9., motor rotation blockage protection; 10., motor loss protecting.
Supersynchronous high speed lifting type controller, speed governing illustrates as table 1
Table 1
The speed setting value of respectively corresponding three the speed governing shelves of these three parameters, the scope that arranges of each gear speed is the same, but must meet first gear speed≤second speed≤third speed.
Note: for elevating mechanism, if the speed setting value of speed governing shelves surpasses 30%, the configuration of rotor resistance must be adjusted.
Claims (3)
1. a full digital AC crane rotor thyristor speed setting controller, it is characterized in that, comprising: tablet (1), output board (2), single-chip microcomputer (3), thyristor trigger board (4), current sensor (5), thyristor (6), operation panel (7), substrate (8);
Described tablet (1), output board (2), single-chip microcomputer (3), thyristor trigger board (4) are inserted on substrate (8) by connector;
Described tablet (1), output board (2), thyristor trigger board (4), operation panel (7) are connected with single-chip microcomputer (3) respectively;
Described current sensor (5) one end by first interface circuit with single-chip microcomputer (3) by being connected, the other end is connected with motor rotor;
Described thyristor trigger board (4) is connected with thyristor (6) by the second interface circuit;
Described thyristor (6) is connected with the resistor (9) in AC motor rotor loop, for continuously change the resistance of the resistor (9) of rotor loop by changing its angle of flow, realizes and regulates alternating current motor rotating speed.
2. full digital AC crane rotor thyristor speed setting controller according to claim 1, it is characterized in that, described speed setting controller also comprises the temperature sensor (10) being arranged on thyristor (6) fin, and described single-chip microcomputer (3) is connected with temperature sensor (10) by interface circuit.
3. according to full digital AC crane rotor thyristor speed setting controller described in claim 1 or 2; it is characterized in that; described speed setting controller also comprises resistance-capacitance protection device (11), and described resistance-capacitance protection device (11) one end is connected with the second interface circuit, and the other end is connected with thyristor (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420020995.3U CN203722532U (en) | 2014-01-14 | 2014-01-14 | All-digital alternating current crane rotor thyristor speed regulation controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420020995.3U CN203722532U (en) | 2014-01-14 | 2014-01-14 | All-digital alternating current crane rotor thyristor speed regulation controller |
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| Publication Number | Publication Date |
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| CN203722532U true CN203722532U (en) | 2014-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420020995.3U Expired - Fee Related CN203722532U (en) | 2014-01-14 | 2014-01-14 | All-digital alternating current crane rotor thyristor speed regulation controller |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104635526A (en) * | 2014-12-01 | 2015-05-20 | 国网上海市电力公司 | Electromagnetic isolation control switching system of crane |
| CN104868818A (en) * | 2015-05-29 | 2015-08-26 | 上海共久电气有限公司 | Speed regulation method and device of quenching crane |
-
2014
- 2014-01-14 CN CN201420020995.3U patent/CN203722532U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104635526A (en) * | 2014-12-01 | 2015-05-20 | 国网上海市电力公司 | Electromagnetic isolation control switching system of crane |
| CN104635526B (en) * | 2014-12-01 | 2017-11-24 | 国网上海市电力公司 | A kind of crane electromagnetic isolation controlling switch system |
| CN104868818A (en) * | 2015-05-29 | 2015-08-26 | 上海共久电气有限公司 | Speed regulation method and device of quenching crane |
| CN104868818B (en) * | 2015-05-29 | 2017-10-20 | 上海共久电气有限公司 | A kind of method and device for realizing quenching crane speed governing |
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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: 20140716 Termination date: 20160114 |