CN104932404A - Frequency converter frequency instruction control system - Google Patents
Frequency converter frequency instruction control system Download PDFInfo
- Publication number
- CN104932404A CN104932404A CN201510264598.XA CN201510264598A CN104932404A CN 104932404 A CN104932404 A CN 104932404A CN 201510264598 A CN201510264598 A CN 201510264598A CN 104932404 A CN104932404 A CN 104932404A
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- CN
- China
- Prior art keywords
- frequency
- control module
- frequency converter
- module
- action table
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/15—Plc structure of the system
- G05B2219/15078—Modules, construction of system
Abstract
The invention relates to an electrical equipment control technology, and aims to solve the problem that remote control and stepped-stepless integrated adjustment cannot be realized due to narrow frequency adjustment range of the existing frequency converter. The invention provides a frequency converter frequency instruction control system comprising a PLC control module, a linkage platform control module, a frequency control module, and a power module. The PLC control module is connected with the linkage platform control module and the frequency control module, and the power module is connected with the linkage platform control module. The linkage platform control module is used to provide frequency instruction signals including a stepless speed adjustment voltage signal and a stepped speed adjustment switching signal. The PLC control module is used to analyze the frequency instruction signals provided by the linkage platform control module and determine to output a signal of a certain gear to the frequency control module. The frequency control module is used to adjust the frequency to a frequency corresponding to the signal of a certain gear output by the PLC control module. The power module is used to provide direct-current power for the linkage platform control module.
Description
Technical field
The present invention relates to electrical equipment control technology, particularly the frequency control system of frequency converter.
Background technology
The frequency instruction of current frequency converter is given generally adopts following three kinds of modes, and mode one: analog quantity arranges given frequency values, namely makes by the resistance value of regulator potentiometer the voltage or the current value change that are added to frequency converter, thus realize the frequency change of frequency converter; Mode two: Keyboard Setting, namely user directly changes the setpoint frequency of frequency converter by potentiometer, numerical key or the rise and fall key changed on the manipulater keyboard of frequency converter; Mode three: contact point signal is given, frequency instruction is predisposed to many gears, and the selection of each gear is controlled by input terminal, and frequency values size is then given by manipulater.Wherein mode one may affect by the anglec of rotation of operating grip, and the scope using potentiometer to regulate is narrow, only has stepless speed regulation and without step speed regulation, makes the velocity range of the output of frequency converter narrow; The System's composition more complicated of mode two keyboard operation, is generally used for local control, cannot realizes Long-distance Control; Mode three cannot realize stepless speed regulation.
Summary of the invention
The object of the invention is frequency-tuning range in order to solve existing frequency converter narrow, Long-distance Control cannot be realized and the problem that level and stepless fusion regulate can not be realized.
For achieving the above object, the invention provides a kind of frequency converter frequency command control system, it is characterized in that, comprise PLC control module, joint action table control module, frequency control module and power module, described PLC control module is connected with joint action table control module and frequency control module respectively, and described power module is connected with joint action table control module;
Joint action table control module, for providing frequency command signal, described frequency command signal comprises the voltage signal of stepless speed regulation and the switching signal of step speed regulation;
PLC control module, analyzes the frequency command signal that joint action table control module provides, and determines the signal exporting a certain gear to frequency control module;
Frequency control module, the frequency that the signal for a certain gear frequency adjustment exported to PLC control module is corresponding;
Power module, for providing direct supply for joint action table control module.
Particularly, described frequency control module is LAB circuit controller, described joint action table control module comprises operating grip, potentiometer and microswitch unit, and described operating grip is connected with potentiometer and microswitch unit, and described power module is connected with microswitch unit.
Particularly, described LAB circuit controller comprises DC relay, the second potentiometer, light emitting diode, diode and resistance, described LAB circuit controller comprises DC relay, the second potentiometer, light emitting diode and resistance, be connected with the coil of DC relay after described light emitting diode is in series with a resistor, the normally opened contact of DC relay controls the on-state of the second potentiometer.
Particularly, described frequency converter module comprises frequency converter, the analog input terminal of frequency converter and the analog quantity power supply terminal of frequency converter, potentiometer, the microswitch unit of described joint action table control module are connected with the input end of LAB circuit controller respectively, the output terminal of LAB circuit controller is connected with the analog input terminal of frequency converter respectively, the analog quantity power supply terminal of frequency converter be supplied to after LAB circuit controller inter-process joint action table potentiometer power end.
Particularly, described power module is 24V DC power supplier.
Preferably, the speed adjustable range of described stepless speed regulation is 0-50Hz.
Particularly, described microswitch unit is used for realizing step speed regulation, comprises four groups of microswitches, is respectively used to the speed regulating 50Hz, 75Hz, 100Hz and 120Hz.
Further, also comprise PLC input/output module, described PLC input/output module is connected with microswitch unit and PLC control module respectively.
Further, also comprise PLC input/output module, described PLC input/output module is connected with microswitch unit and PLC control module respectively.
The invention has the beneficial effects as follows: can realize stepless speed regulation by frequency control system and step speed regulation combines, make speed adjustable range wider, operation debugging is simplified, and user can set the frequency values of step speed regulation according to actual conditions.
Below in conjunction with drawings and Examples, technical scheme of the present invention is described in further detail, it should be noted that embodiment is only used to help reader to understand technical conceive of the present invention better, not in order to limit the protection domain of the claims in the present invention.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the frequency converter frequency command control system of the embodiment of the present invention.
Embodiment
The present invention is directed to the frequency-tuning range that existing three kinds of frequency control systems exist narrow, Long-distance Control cannot be realized and the problem that level and stepless fusion regulate can not be realized, a kind of frequency converter frequency command control system is provided, this system comprises PLC control module, joint action table control module, frequency control module and power module, described PLC control module is connected with joint action table control module and frequency control module respectively, and described power module is connected with joint action table control module; Joint action table control module, for providing frequency command signal, described frequency command signal comprises the voltage signal of stepless time adjustment and the switching signal of step speed regulation; PLC control module, analyzes the frequency command signal that joint action table control module provides, and determines the signal exporting a certain gear to frequency control module; Frequency control module, the frequency that the signal for a certain gear frequency adjustment exported to PLC control module is corresponding; Power module, for providing direct supply for joint action table control module.
Embodiment
Below in conjunction with embodiment, one exemplary description is done to the composition of this frequency converter frequency command control system and annexation thereof.
For the frequency conversion mechanism debugging control system of Sichuan Construction machinery incorporated company, as shown in Figure 1, frequency instruction control system comprises: joint action table control module, power module, PLC control module and frequency control module.Frequency control module is LAB circuit controller, and described joint action table control module comprises operating grip, potentiometer and microswitch unit, and described operating grip is connected with potentiometer and microswitch unit, and described power module is connected with microswitch unit.Microswitch unit is connected with PLC control module by PLC input/output module, it specifically comprises first gear speed microswitch, second speed microswitch, third speed microswitch and fourth speed microswitch, be respectively used to the speed of control 50Hz, 75Hz, 100Hz and 120Hz, the setting of its speed is the resistance value of the potentiometer regulating corresponding gear on LAB circuit controller.LAB circuit controller comprises DC relay, the second potentiometer, light emitting diode, diode and resistance, described LAB circuit controller comprises DC relay, the second potentiometer, light emitting diode and resistance, be connected with the coil of DC relay after described light emitting diode is in series with a resistor, the normally opened contact of DC relay controls the on-state of the second potentiometer.
Frequency converter module comprises the analog quantity power supply terminal of analog input terminal machine frequency converter of frequency converter, frequency converter, potentiometer, the microswitch unit of described joint action table control module are connected with the input end of LAB circuit controller respectively, the output terminal of LAB circuit controller is connected with the analog input terminal of frequency converter respectively, the analog quantity power supply terminal of frequency converter be supplied to after LAB circuit controller inter-process joint action table potentiometer power end.Flat device module is connected with PLC control module by external touch normally opened contact.
Use when low speed segment 0 ~ 50Hz potentiometer to realize stepless speed regulation, during more than high regime 50Hz, make joint action table microswitch realize step speed regulation mode.The top speed 50Hz of stepless speed regulation is identical with the first gear speed (50Hz) of step speed regulation, thus realizes the conversion of stepless speed regulation to step speed regulation.
Claims (9)
1. frequency converter frequency command control system, it is characterized in that, comprise PLC control module, joint action table control module, frequency control module and power module, described PLC control module is connected with joint action table control module and frequency control module respectively, and described power module is connected with joint action table control module;
Joint action table control module, for providing frequency command signal, described frequency command signal comprises the voltage signal of stepless speed regulation and the switching signal of step speed regulation;
PLC control module, analyzes the frequency command signal that joint action table control module provides, and determines the signal exporting a certain gear to frequency control module;
Frequency control module, the frequency that the signal for described a certain gear frequency adjustment exported to PLC control module is corresponding;
Power module, for providing direct supply for joint action table control module.
2. frequency converter frequency command control system as claimed in claim 1, it is characterized in that, described frequency control module is LAB circuit controller, described joint action table control module comprises operating grip, potentiometer and microswitch unit, described operating grip is connected with potentiometer and microswitch unit, and described power module is connected with microswitch unit.
3. frequency converter frequency command control system as claimed in claim 2, it is characterized in that, described LAB circuit controller comprises DC relay, the second potentiometer, light emitting diode and resistance, be connected with the coil of DC relay after described light emitting diode is in series with a resistor, the normally opened contact of DC relay controls the on-state of the second potentiometer.
4. frequency converter frequency command control system as claimed in claim 2, it is characterized in that, described frequency converter module comprises frequency converter, the analog input terminal of frequency converter and the analog quantity power supply terminal of frequency converter, potentiometer, the microswitch unit of described joint action table control module are connected with the input end of LAB circuit controller respectively, the output terminal of LAB circuit controller is connected with the analog input terminal of frequency converter respectively, the analog quantity power supply terminal of frequency converter be supplied to after LAB circuit controller inter-process joint action table potentiometer power end.
5. the frequency converter frequency command control system as described in Claims 1-4 any one, is characterized in that, described power module is 24V DC power supplier.
6. frequency converter frequency command control system as claimed in claim 5, it is characterized in that, the speed adjustable range of described stepless speed regulation is 0-50Hz.
7. frequency converter frequency command control system as claimed in claim 6, it is characterized in that, described microswitch unit is used for realizing step speed regulation, comprises four groups of microswitches, is respectively used to the speed regulating 50Hz, 75Hz, 100Hz and 120Hz.
8. frequency converter frequency command control system as claimed in claims 6 or 7, it is characterized in that, also comprise PLC input/output module, described PLC input/output module is connected with microswitch unit and PLC control module respectively.
9. frequency converter frequency command control system as claimed in claim 8, is characterized in that, also comprise external control normally opened contact, described external touch normally opened contact respectively with PLC control module and frequency converter model calling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510264598.XA CN104932404B (en) | 2015-05-22 | 2015-05-22 | Frequency converter frequency command control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510264598.XA CN104932404B (en) | 2015-05-22 | 2015-05-22 | Frequency converter frequency command control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104932404A true CN104932404A (en) | 2015-09-23 |
| CN104932404B CN104932404B (en) | 2018-02-27 |
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| CN201510264598.XA Active CN104932404B (en) | 2015-05-22 | 2015-05-22 | Frequency converter frequency command control system |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020011457A1 (en) * | 2000-04-28 | 2002-01-31 | Potain (Societe Anonyme) | Control monitoring device for tower cranes |
| CN2641003Y (en) * | 2002-12-27 | 2004-09-15 | 四川建设机械（集团）股份有限公司 | Frequency controller for hoisting mechanism of tower crane |
| CN101665220A (en) * | 2009-09-25 | 2010-03-10 | 四川建设机械（集团）股份有限公司 | Variable-frequency speed-regulating control system of crane |
| CN102185555A (en) * | 2010-12-28 | 2011-09-14 | 上海智大电子有限公司 | Digitalized alternating-current voltage and speed regulation device |
| CN103043534A (en) * | 2012-12-24 | 2013-04-17 | 西安理工大学 | Tower crane hoisting and speed control system and speed control method thereof |
| CN103338004A (en) * | 2013-07-09 | 2013-10-02 | 四川建设机械（集团）股份有限公司 | Speed adjustment control system |
| CN203574582U (en) * | 2013-05-20 | 2014-04-30 | 楚天科技股份有限公司 | Motor speed adjusting device |
-
2015
- 2015-05-22 CN CN201510264598.XA patent/CN104932404B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020011457A1 (en) * | 2000-04-28 | 2002-01-31 | Potain (Societe Anonyme) | Control monitoring device for tower cranes |
| CN2641003Y (en) * | 2002-12-27 | 2004-09-15 | 四川建设机械（集团）股份有限公司 | Frequency controller for hoisting mechanism of tower crane |
| CN101665220A (en) * | 2009-09-25 | 2010-03-10 | 四川建设机械（集团）股份有限公司 | Variable-frequency speed-regulating control system of crane |
| CN102185555A (en) * | 2010-12-28 | 2011-09-14 | 上海智大电子有限公司 | Digitalized alternating-current voltage and speed regulation device |
| CN103043534A (en) * | 2012-12-24 | 2013-04-17 | 西安理工大学 | Tower crane hoisting and speed control system and speed control method thereof |
| CN203574582U (en) * | 2013-05-20 | 2014-04-30 | 楚天科技股份有限公司 | Motor speed adjusting device |
| CN103338004A (en) * | 2013-07-09 | 2013-10-02 | 四川建设机械（集团）股份有限公司 | Speed adjustment control system |
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| CN104932404B (en) | 2018-02-27 |
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