CN203883683U - Frequency conversion device provided with PLC controller - Google Patents
Frequency conversion device provided with PLC controller Download PDFInfo
- Publication number
- CN203883683U CN203883683U CN201420066830.XU CN201420066830U CN203883683U CN 203883683 U CN203883683 U CN 203883683U CN 201420066830 U CN201420066830 U CN 201420066830U CN 203883683 U CN203883683 U CN 203883683U
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- plc controller
- control line
- inverter
- unit
- frequency conversion
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- Expired - Fee Related
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- Inverter Devices (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The utility model relates to a frequency conversion device provided with a PLC controller. The frequency conversion device comprises a rectifier unit, a high-capacity capacitor, an inverter and a PLC controller; the rectifier unit is connected via a control line to the PLC controller; the high-capacity capacitor is connected via the control line to the PLC controller; and the inverter is connected via the control line to the PLC controller. The frequency conversion and energy conservation of the device is mainly embodied in the application to fans and pumps. In order to ensure the reliability of the production, a certain amount of surplus is left in the design of power drive for a variety of production machinery. When a motor is not running at full load, in addition to power-driven requirements, excess torque increases the active power consumption, which results in energy waste.
Description
Technical field
The utility model belongs to control system technical field, particularly relates to a kind of converter plant of the PLC of being provided with controller.
Background technology
At present, in dragging system, mainly adopt DC motor, but DC motor because structural reason causes a lot of shortcomings, because DC motor exists commutation spark, be difficult to be applied to the adverse circumstances that have flammable explosive gas; And need to regularly replace brush and commutator, maintaining difficulty, the life-span is shorter; Complex structure besides, is difficult to manufacture large capacity, high rotating speed and high-tension DC motor.Common converter plant is controlled the electric power control of alternating current motor by changing machine operation supply frequency mode.General frequency conversion unit involves great expense than common unit, and maintenance requirement is high, and frequency converter is made up of multiple parts, and some of them parts its performance after long-term work can reduce gradually, aging, and therefore its some parts will often be changed; Frequency converter is safeguarded not in time, can break down, and then shorten the useful life of equipment, and therefore daily maintenance and maintenance seem especially important, and then increases the investment of equipment.Be badly in need of one cheap, the converter plant that maintenance cost is low.
Summary of the invention
The utility model provides a kind of simple in structure, easy to install, converter plant that is provided with PLC controller of increasing work efficiency for solving the technical problem existing in known technology.
The technical scheme that the utility model is taked for the technical problem existing in solution known technology is: comprise rectification unit, high power capacity electric capacity, inverter and PLC controller; Rectification unit is connected with PLC controller by control line, and high power capacity electric capacity is connected with PLC controller by control line, and inverter is connected with PLC controller by control line.
The utility model can also adopt following technical measures:
PLC controller is by central processor unit, power module, holder and input/output interface composition.Central processor unit is made up of controller, arithmetic unit and register.Central processor unit is connected with holder, input/output interface by address bus, data/address bus, control bus.
Rectification unit forms by diode with by carrying tap changer.
Inverter inside is provided with an error amplifier, adjuster, oscillator, the PWM generator, low-voltage variation circuit units and the short-circuit protection circuit unit that have dead band to control.
Advantage and the good effect that the utlity model has are: the energy-saving and frequency-variable of this device is mainly manifested in the application of blower fan, water pump.For the reliability that ensures to produce, various manufacturing machines, in the time of the power drive of design adapted, all leave certain surplus capacity.In the time that motor can not move under at full capacity, except reaching power drive requirement, unnecessary moment has increased the consumption of active power, causes the waste of electric energy.The traditional speed regulating methods of equipment such as blower fan, pump class are that baffle plate, the valve opening by regulating entrance or outlet regulates to air quantity and confluent, and its input power is large, and a large amount of energy resource consumptions damming in process at baffle plate, valve.In the time using frequency control, if traffic requirement reduces, can meet the demands by the rotating speed that reduces pump or fan.
Brief description of the drawings
Fig. 1 is the structural representation of the converter plant that is provided with PLC controller that provides of the utility model;
In figure: 1, rectification unit; 2, high power capacity electric capacity; 3, inverter; 4, PLC controller.
Embodiment
For further understanding summary of the invention of the present utility model, Characteristic, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Fig. 1 is the structural representation of the converter plant that is provided with PLC controller that provides of the utility model.This device comprises rectification unit 1, high power capacity electric capacity 2, inverter 3 and PLC controller 4; Rectification unit 1 is connected with PLC controller 4 by control line, and high power capacity electric capacity 2 is connected with PLC controller 4 by control line, and inverter 3 is connected with PLC controller 4 by control line.
PLC controller 4 is by central processor unit, power module, holder and input/output interface composition.Central processor unit is made up of controller, arithmetic unit and register.Central processor unit is connected with holder, input/output interface by address bus, data/address bus, control bus.Central processing unit is the core of PLC controller 4, and its continuous Gather and input signal is carried out user program, updating system output.
Rectification unit 1 forms by diode with by carrying tap changer.
Inverter 3 inside are provided with an error amplifier, adjuster, oscillator, the PWM generator, low-voltage variation circuit units and the short-circuit protection circuit unit that have dead band to control.
Alternating current fixing operating frequency is converted to direct current by rectification unit 1, high power capacity electric capacity 2 is used for storing the electric energy after conversion, inverter 3 forms electronic switch by high-power switching transistor array, direct current is changed into the square wave of different frequency, width, amplitude, PLC controller 4 is by the program work of setting, control amplitude and the pulsewidth of output square wave, make to be superposed to the alternating current of near sinusoidal ripple, drive alternating current motor.
Advantage and the good effect that the utlity model has are: the energy-saving and frequency-variable of this device is mainly manifested in the application of blower fan, water pump.For the reliability that ensures to produce, various manufacturing machines, in the time of the power drive of design adapted, all leave certain surplus capacity.In the time that motor can not move under at full capacity, except reaching power drive requirement, unnecessary moment has increased the consumption of active power, causes the waste of electric energy.The traditional speed regulating methods of equipment such as blower fan, pump class are that baffle plate, the valve opening by regulating entrance or outlet regulates to air quantity and confluent, and its input power is large, and a large amount of energy resource consumptions damming in process at baffle plate, valve.In the time using frequency control, if traffic requirement reduces, can meet the demands by the rotating speed that reduces pump or fan.
The above is only to preferred embodiment of the present utility model, not the utility model is done to any pro forma restriction, every foundation technical spirit of the present utility model is to any simple modification made for any of the above embodiments, equivalent variations and modification, all belong in the scope of technical solutions of the utility model.
Claims (4)
1. be provided with a converter plant for PLC controller, comprise rectification unit, high power capacity electric capacity, inverter and PLC controller; It is characterized in that, rectification unit is connected with PLC controller by control line, and high power capacity electric capacity is connected with PLC controller by control line, and inverter is connected with PLC controller by control line.
2. the converter plant that is provided with PLC controller according to claim 1, is characterized in that, PLC controller is by central processor unit, power module, holder and input/output interface composition; Central processor unit is made up of controller, arithmetic unit and register; Central processor unit is connected with holder, input/output interface by address bus, data/address bus, control bus.
3. the converter plant that is provided with PLC controller according to claim 1, is characterized in that, rectification unit forms by diode with by carrying tap changer.
4. the converter plant that is provided with PLC controller according to claim 1, is characterized in that, inverter inside is provided with an error amplifier, adjuster, oscillator, the PWM generator, low-voltage variation circuit units and the short-circuit protection circuit unit that have dead band to control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420066830.XU CN203883683U (en) | 2014-02-14 | 2014-02-14 | Frequency conversion device provided with PLC controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420066830.XU CN203883683U (en) | 2014-02-14 | 2014-02-14 | Frequency conversion device provided with PLC controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203883683U true CN203883683U (en) | 2014-10-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420066830.XU Expired - Fee Related CN203883683U (en) | 2014-02-14 | 2014-02-14 | Frequency conversion device provided with PLC controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203883683U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105565091A (en) * | 2016-01-26 | 2016-05-11 | 刘圣银 | Elevator control system based on Bluetooth communication technology |
| CN105769350A (en) * | 2016-02-25 | 2016-07-20 | 杨胜珍 | Skin preparation device for neurosurgery operation |
-
2014
- 2014-02-14 CN CN201420066830.XU patent/CN203883683U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105565091A (en) * | 2016-01-26 | 2016-05-11 | 刘圣银 | Elevator control system based on Bluetooth communication technology |
| CN105769350A (en) * | 2016-02-25 | 2016-07-20 | 杨胜珍 | Skin preparation device for neurosurgery operation |
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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: 20141015 Termination date: 20150214 |
|
| EXPY | Termination of patent right or utility model |