CN203574582U - Motor speed adjusting device - Google Patents
Motor speed adjusting device Download PDFInfo
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- CN203574582U CN203574582U CN201320273902.3U CN201320273902U CN203574582U CN 203574582 U CN203574582 U CN 203574582U CN 201320273902 U CN201320273902 U CN 201320273902U CN 203574582 U CN203574582 U CN 203574582U
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- output module
- over switch
- analog output
- frequency converter
- voltage signal
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Abstract
The utility model discloses a motor speed adjusting device, and the device comprises a frequency converter, a programmable logic controller, an analog output module, an adjustable potentiometer, and a change-over switch. An input power supply is converted by the frequency converter and then supplied to a motor. A speed set value is converted by the programmable logic controller, and then a voltage signal is outputted by the analog output module. The negative electrode M of the voltage signal of the analog output module, an external frequency set end COM of the frequency converter, and the tail end of the adjustable potentiometer are connected together. The positive electrode M of the voltage signal of the analog output module is connected to the public end of the change-over switch. The normally-closed end of the change-over switch and the center tap of the adjustable potentiometer are combined together, and then connected to a voltage signal terminal AV1 in an external frequency set terminal of the frequency converter. The normally-opened and NO of the change-over switch is connected to the head end of the adjustable potentiometer. The device provided by the utility model is simple in structure, is convenient in installation, is convenient to operate, and is good in adjustability.
Description
Technical field
The utility model is mainly concerned with Motor Control Field, refers in particular to a kind of speed regulating device that are applicable to Electric Machine Control.
Background technology
In the packaging facilities such as medicine, food, the master of the equipment machine that conducts electricity adopts the threephase asynchronous machine of transducer drive mostly.
Existing main speed-regulating scheme is in frequency converter 1 foreign frequency, to set the external adjustable potentiometer 7 of terminal to realize (as shown in Figure 1), this mode is referred to as potentiometer mode of speed regulation, its advantage is that speed governing is convenient, uses very flexible when equipment debugging or maintenance; Its shortcoming is: in production run process, because the slippery fellow of adjustable potentiometer 7 inside may drift about, cause the speed of service of equipment to have the unsteadiness of random change.
Along with GMP upgrading, requirement equipment moves by certain setting speed (formula speed) when production run, potentiometer mode of speed regulation precision does not originally reach requirement, so just there is the analog output module 6(D/A module that adopts PLC) output voltage signal (scope 0-10V or a 0-5V, specifically will be depending on frequency converter 1) regulate the running frequency (as shown in Figure 2) of frequency converter 1, the size of this output voltage values can adopt the form of formula to set as required in man-machine interface, after carrying out computing, PLC inside exports from D/A module, this mode of speed regulation is referred to as the mode of speed regulation of filling a prescription.The advantage of this mode is to have avoided equipment speed destabilizing factor in process of production, and its shortcoming is the flexibility that has adopted potentiometer speed governing while having sacrificed equipment debugging or maintenance.
Utility model content
The technical problems to be solved in the utility model is just: the technical problem existing for prior art, the utility model provides a kind of simple in structure, easy for installation, easy to operate, motor speed control device that adjustability is good.
For solving the problems of the technologies described above, the utility model by the following technical solutions:
A kind of motor speed control device, comprise frequency converter, programmable logic controller (PLC), analog output module, adjustable potentiometer and change over switch, described input power is via the conversion supply motor of frequency converter, and described programmable logic controller (PLC) will be exported a voltage signal by analog output module after Speed Setting value transform according to the algorithm in program; The end that the negative pole M of the voltage signal of described analog output module, the foreign frequency of frequency converter are set end COM, adjustable potentiometer links together, the anodal V of the voltage signal of described analog output module is connected to the common port of change over switch, the normal-closed end NC of described change over switch and the centre tap of adjustable potentiometer and together be connected to frequency converter foreign frequency set voltage signal terminal AVI in terminal, the Chang Kaiduan NO of described change over switch is connected to the head end of adjustable potentiometer.
As further improvement of the utility model:
Described programmable logic controller (PLC) is connected with a man-machine interface.
Compared with prior art, the utility model has the advantage of:
1, the utility model, by change over switch will fill a prescription speed governing and these two kinds of organic combinations of mode of speed regulation of potentiometer speed governing, can adopt formula speed governing when device fabrication moves, the stability of device rate while guaranteeing production run; When debugging, can use potentiometer speed governing, the flexibility of speed governing when having retained debugging or having detected; And conversion is convenient between the two, the flexibility of the potentiometer speed governing when stability of the formula speed governing while having realized production run on same equipment and commissioning test.
2, the utility model has solved the versatility problem of Electric Appliance Cabinet panel, has reduced Machine Design personnel's workload, has reduced scheduling of production personnel and stock clerk's workload.While adopting potentiometer mode of speed regulation separately, need on Electric Appliance Cabinet panel, open the installing hole of adjustable potentiometer, and adopt separately the installing hole that need not open adjustable potentiometer while filling a prescription mode of speed regulation on Electric Appliance Cabinet panel.
3, the utility model has solved the versatility problem of control program, has reduced electrical design personnel's workload.While adopting potentiometer mode of speed regulation separately, man-machine interface program does not need Speed Setting program, and PLC program does not need velocity transformation output program; And adopt separately while filling a prescription mode of speed regulation, man-machine interface program needs Speed Setting program, and PLC program needs velocity transformation output program.
Accompanying drawing explanation
Fig. 1 is the structural principle schematic diagram of available technology adopting potentiometer mode.
Fig. 2 is the structural principle schematic diagram of available technology adopting D/A modular manner.
Fig. 3 is structural principle schematic diagram of the present utility model.
Marginal data:
1, frequency converter; 2, input power; 3, motor; 4, man-machine interface; 5, programmable logic controller (PLC); 6, analog output module; 7, adjustable potentiometer; 8, change over switch.
Embodiment
Below with reference to Figure of description and specific embodiment, the utility model is described in further details.
As shown in Figure 3, motor speed control device of the present utility model comprises the single-phase or three-phase of frequency converter 1(), programmable logic controller (PLC) 5, analog output module 6(D/A module), adjustable potentiometer 7(RP) and change over switch 8, single-phase or the three-phase of input power 2() via the conversion supply motor 3 of frequency converter 1, programmable logic controller (PLC) 5(PLC) according to the algorithm in program, will after Speed Setting value transform, by analog output module 6, export a voltage signal.Wherein, the end (being illustrated as right-hand member) that the negative pole M of the voltage signal of analog output module 6, the foreign frequency of frequency converter 1 are set end COM, adjustable potentiometer 7 links together, the anodal V of the voltage signal of analog output module 6 is connected to the common port of change over switch 8, the normal-closed end NC of change over switch 8 and the centre tap of adjustable potentiometer 7 and together be connected to frequency converter 1 foreign frequency set voltage signal terminal AVI in terminal, the Chang Kaiduan NO of change over switch 8 is connected to the head end (being illustrated as left end) of adjustable potentiometer 7.
In the present embodiment, by programmable logic controller (PLC) 5 and a man-machine interface 4(HMI) be connected, the upper limit speed when can distinguish the production run speed of set device and debugging in man-machine interface 4.Data between this man-machine interface 4 and programmable logic controller (PLC) 5 are real-time exchange.
When production run, change over switch 8 can be placed in to the position of normal-closed end NC, the voltage of analog output module 6 is directly added in the foreign frequency of frequency converter 1 and sets end COM, realizes formula speed governing, the object of stable equipment operation while reaching production run.
When commissioning test, change over switch 8 can be placed in to the position of Chang Kaiduan NO, the voltage of analog output module 6 is added in the foreign frequency of frequency converter 1 and sets end COM, the flexibility of governing speed at any time while reaching commissioning test after the dividing potential drop of adjustable potentiometer 7.
Below be only preferred implementation of the present utility model, protection range of the present utility model is also not only confined to above-described embodiment, and all technical schemes belonging under the utility model thinking all belong to protection range of the present utility model.It should be pointed out that for those skilled in the art, in the some improvements and modifications that do not depart under the utility model principle prerequisite, should be considered as protection range of the present utility model.
Claims (2)
1. a motor speed control device, it is characterized in that, comprise frequency converter (1), programmable logic controller (PLC) (5), analog output module (6), adjustable potentiometer (7) and change over switch (8), described input power (2) is via the conversion supply motor (3) of frequency converter (1), and described programmable logic controller (PLC) (5) will be exported a voltage signal by analog output module (6) after Speed Setting value transform; The end that the negative pole M of the voltage signal of described analog output module (6), the foreign frequency of frequency converter (1) are set end COM, adjustable potentiometer (7) links together, the anodal V of the voltage signal of described analog output module (6) is connected to the common port of change over switch (8), the centre tap of the normal-closed end NC of described change over switch (8) and adjustable potentiometer (7) and together be connected to frequency converter (1) foreign frequency set voltage signal terminal AVI in terminal, the Chang Kaiduan NO of described change over switch (8) is connected to the head end of adjustable potentiometer (7).
2. motor speed control device according to claim 1, is characterized in that, described programmable logic controller (PLC) (5) is connected with a man-machine interface (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320273902.3U CN203574582U (en) | 2013-05-20 | 2013-05-20 | Motor speed adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320273902.3U CN203574582U (en) | 2013-05-20 | 2013-05-20 | Motor speed adjusting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203574582U true CN203574582U (en) | 2014-04-30 |
Family
ID=50542291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320273902.3U Expired - Lifetime CN203574582U (en) | 2013-05-20 | 2013-05-20 | Motor speed adjusting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203574582U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104932404A (en) * | 2015-05-22 | 2015-09-23 | 四川建设机械（集团）股份有限公司 | Frequency converter frequency instruction control system |
| CN105396682A (en) * | 2015-10-21 | 2016-03-16 | 西部黄金克拉玛依哈图金矿有限责任公司 | Automatic ore feeding frequency adjusting system |
-
2013
- 2013-05-20 CN CN201320273902.3U patent/CN203574582U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104932404A (en) * | 2015-05-22 | 2015-09-23 | 四川建设机械（集团）股份有限公司 | Frequency converter frequency instruction control system |
| CN105396682A (en) * | 2015-10-21 | 2016-03-16 | 西部黄金克拉玛依哈图金矿有限责任公司 | Automatic ore feeding frequency adjusting system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140430 |
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| CX01 | Expiry of patent term |