CN212541086U

CN212541086U - PLC-based proportional electromagnet power supply control circuit

Info

Publication number: CN212541086U
Application number: CN202021601710.7U
Authority: CN
Inventors: 刘雄伟; 孟凡朋
Original assignee: ANYANG KAIDI ELECTROMAGNETIC TECHNOLOGY CO LTD
Current assignee: Anyang Kaidi Magnetic Technology Co.,Ltd.
Priority date: 2020-08-05
Filing date: 2020-08-05
Publication date: 2021-02-12
Anticipated expiration: 2030-08-05

Abstract

The utility model discloses a PLC-based proportional electromagnet power supply control circuit, which comprises a PLC control box and a power supply control unit which is in control connection with the PLC control box and two ends of a proportional electromagnet coil; the power control unit comprises an optical coupler and an MOS (metal oxide semiconductor) tube, the anode and the cathode of the optical coupler are respectively connected with a switch power supply end of the PLC control box and a Y1 terminal, and the collector of the optical coupler is respectively connected with the anode V + of the power supply and one end of the proportional electromagnet coil; the emitting electrode of the optical coupler is connected with the G pole of the MOS tube, and the D pole and the S pole of the MOS tube are respectively connected with the other end of the proportional electromagnet coil and the negative pole V-of the power supply; the power supply is an adjustable voltage-stabilized power supply. The utility model discloses convenient and fast's realization high-speed joint also can effectively solve simultaneously and influence proportion hydrovalve dynamic response performance, can improve the steady state characteristic of hysteresis loop comparative example valve electro-magnet to performance proportion hydrovalve is to the best performance that position or speed required precision are high.

Description

PLC-based proportional electromagnet power supply control circuit

Technical Field

The utility model relates to an electromagnet amplifier technical field for the proportional valve, concretely relates to proportional electromagnet power control circuit based on PLC.

Background

In today's automation lines, automation control is the core. In an automatic control system, the development of PLC guides the development of automation industry, and along with the rapid development of electronic technology, PLC is generally adopted in the market. The PLC integrates electricity, instruments and control into a whole, can be conveniently and flexibly combined into various control systems with different scales according to field and control requirements so as to meet the requirements of various industrial controls, and has the advantages of huge functions, sensitive response, quick configuration, convenient operation and the like. In some hydraulic environment automatic production lines and environments with high requirements for position accuracy, proportional electromagnets are widely applied, sufficient current must be provided for outputting signals to overcome spring force and hydraulic force, current values required by maximum displacement of the proportional electromagnets produced by different manufacturers on the market are usually different from 600-3000mA, and industrial control standard signals are usually voltage signals of 0-5V/0-10V/-5V- +5V/-10V- +10V or current signals of 0-20mA/4-20mA, so that the control signals have weak load carrying capacity and are not enough to push the proportional electromagnets.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a technical scheme who adopts provides a proportion electro-magnet power control circuit based on PLC, include:

the PLC control box is a power supply control unit which is in control connection with the PLC control box and two ends of the proportional electromagnet coil; wherein the content of the first and second substances,

the power control unit comprises an optical coupler and an MOS (metal oxide semiconductor) tube, the anode and the cathode of the optical coupler are respectively connected with a switch power supply end and a Y1 terminal of the PLC control box, and the collector of the optical coupler is respectively connected with the anode V + of the power supply and one end of the proportional electromagnet coil; the emitting electrode of the optical coupler is connected with the G pole of the MOS tube, and the D pole and the S pole of the MOS tube are respectively connected with the other end of the proportional electromagnet coil and the power supply negative pole V-; the power supply is an adjustable voltage-stabilized power supply.

In the above scheme, the positive electrode of the optocoupler and the terminal of the switching power supply of the PLC control box are connected in series with a first resistor R1, the output end of the D electrode of the MOS transistor is connected in series with a second resistor R2, and the emitter of the optocoupler and the S electrode of the MOS transistor are connected in parallel with a third resistor R3.

In the above scheme, the device further comprises a follow current module;

the follow current module comprises at least 2 diode groups which are arranged in parallel; the diode group is composed of at least 2 diodes which are arranged in the same direction and are connected in series; the output end of the follow current module is connected with the common end of the second resistor R2 and the proportional electromagnet coil, and the input end of the follow current module is connected with the common end of the D pole of the MOS tube and the coil at the other end of the proportional electromagnet.

In the scheme, an ammeter is connected and arranged on a connecting line of the output end of the follow current module and the proportional electromagnet coil.

In the above solution, the first resistor R1 and the second resistor R2 are resistors with a resistance of 10K Ω, and the third resistor R3 is a resistor with a resistance of 2K Ω.

In the scheme, the MOS tube is a field effect tube with the model CJU10N 10.

The utility model discloses, the PLC controller that sets up in PLC control box 1 adjusts certain frequency and amplitude through PLC program control, according to the required electric current size of proportion electro-magnet of settlement, PLC program automatically regulated duty cycle to obtain the required control current in the corresponding proportion electro-magnet; the characteristic output of the proportional electromagnet in an automatic production line can be effectively solved, a power supply can be conveniently provided for the proportional electromagnet in the automatic production line, the proportional electromagnet can be quickly connected conveniently and quickly through the change and writing of a PLC program, the dynamic response performance of a proportional hydraulic valve can be effectively influenced, the steady-state characteristic of the hysteresis proportional valve electromagnet can be improved, and therefore the optimal performance of the proportional hydraulic valve with high requirements for position or speed precision is achieved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Figure 1 is the utility model provides a proportion electro-magnet power control circuit schematic diagram based on PLC.

Description of reference numerals:

1: a PLC control box; 2: a proportional electromagnet; 3: an optical coupler; 4: an MOS tube; 5: a follow current module; 6: and (4) an ammeter.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The invention is described in detail below with reference to specific embodiments and the accompanying drawings.

As shown in fig. 1, the utility model provides a proportion electro-magnet power control circuit based on PLC, include: the PLC control box 1 is a power supply control unit which is in control connection with the PLC control box 1 and two ends of a coil of the proportional electromagnet 2; wherein the content of the first and second substances,

the power control unit comprises an optical coupler 3 and an MOS (metal oxide semiconductor) tube 4, the anode and the cathode of the optical coupler 3 are respectively connected with a switch power supply end and a Y1 terminal of the PLC control box 1, and the collector of the optical coupler 3 is respectively connected with the anode V + of the power supply and one end of a coil of the proportional electromagnet 2; the emitting electrode of the optical coupler 3 is connected with the G pole of the MOS tube 4, and the D pole and the S pole of the MOS tube 4 are respectively connected with the other end of the coil of the proportional electromagnet 2 and the negative pole V-of the power supply;

in this embodiment, the PLC control box 1 is provided with a DC24V switching power supply to supply power to the optocoupler 3; the power supply is an adjustable stabilized voltage supply;

in this embodiment, a PLC controller provided in the PLC control box 1 adjusts a certain frequency and amplitude by PLC program control, and the PLC program automatically adjusts a duty ratio according to the current magnitude required by the proportional electromagnet 2, thereby obtaining a control current required in the corresponding proportional electromagnet; the characteristic output of the proportional electromagnet in an automatic production line can be effectively solved, a power supply can be conveniently provided for the proportional electromagnet in the automatic production line, the proportional electromagnet can be quickly connected conveniently and quickly through the change and writing of a PLC program, the dynamic response performance of a proportional hydraulic valve can be effectively influenced, the steady-state characteristic of the hysteresis proportional valve electromagnet can be improved, and therefore the optimal performance of the proportional hydraulic valve with high requirements for position or speed precision is achieved.

In this embodiment, a first resistor R1 is connected in series with a connection line between the positive electrode of the optical coupler 3 and the switching power supply end of the PLC control box 1, a second resistor R2 is connected in series with the output end of the D electrode of the MOS transistor 4, and a third resistor R3 is connected in parallel between the emitter of the optical coupler 3 and the S electrode of the MOS transistor 4; the first resistor R1 and the second resistor R2 are resistors with a resistance of 10K Ω, and the third resistor R3 is a resistor with a resistance of 2K Ω. The first resistor R1, the second resistor R2 and the third resistor R3 respectively play a role of current limiting.

In this embodiment, a freewheeling module 5 for protecting the proportional electromagnet from being burned out is further provided, and the freewheeling module includes at least 2 parallel diode groups, and the diode groups include at least 2 diodes arranged in the same direction and connected in series; the output end of the follow current module is connected with the common end of the second resistor R2 and the coil of the proportional electromagnet 2, and the input end of the follow current module is connected with the common end of the D pole of the MOS tube 4 and the coil at the other end of the proportional electromagnet 2.

In this embodiment, the MOS transistor is a field effect transistor of model CJU10N 10.

In this embodiment, the output end of the follow current module is connected with the coil connecting line of the proportional electromagnet 2 to form an ammeter 6, and the detected current value is fed back to the ammeter of the PLC.

The proportional amplifier power supply based on PLC control that this embodiment provided not only can solve the dynamic response characteristic of proportional valve with the electro-magnet, has characteristics such as efficient moreover, the interface is simple and the interference killing feature is strong.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for apparatus or system embodiments, since they are substantially similar to method embodiments, they are described in relative terms, as long as they are described in partial descriptions of method embodiments. The above-described embodiments of the apparatus and system are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is only exemplary of the invention, and is intended to enable those skilled in the art to understand and implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a proportion electro-magnet power control circuit based on PLC which characterized in that includes:

the PLC control box (1) is a power supply control unit which is in control connection with the PLC control box (1) and two ends of a coil of the proportional electromagnet (2); wherein the content of the first and second substances,

the power control unit comprises an optical coupler (3) and an MOS (metal oxide semiconductor) tube (4), the anode and the cathode of the optical coupler (3) are respectively connected with a power supply end and a Y1 terminal of the PLC control box (1), and the collector of the optical coupler (3) is respectively connected with the anode V + of the power supply and one end of a coil of the proportional electromagnet (2); an emitting electrode of the optical coupler (3) is connected with a G pole of the MOS tube (4), and a D pole and an S pole of the MOS tube (4) are respectively connected with the other end of the proportional electromagnet (2) coil and a power supply negative pole V-; the power supply is an adjustable voltage-stabilized power supply.

2. The PLC-based proportional electromagnet power control circuit of claim 1, wherein the power control circuit comprises a Programmable Logic Controller (PLC)

The positive pole of opto-coupler (3) with concatenate first resistance R1 on the switching power supply terminating line of PLC control box (1), the D utmost point output of MOS pipe (4) concatenates second resistance R2, the projecting pole of opto-coupler (3) with the parallelly connected third resistance R3 of S interelectrode of MOS pipe (4).

3. The PLC-based proportional electromagnet power control circuit of claim 2, further comprising a freewheel module (5);

the follow current module (5) comprises at least 2 parallel diodes; the diode group is composed of at least 2 diodes which are arranged in the same direction and are connected in series; the output end of the follow current module (5) is connected with the common end of the second resistor R2 and the coil of the proportional electromagnet (2), and the input end of the follow current module (5) is connected with the common end of the D pole of the MOS tube (4) and the coil at the other end of the proportional electromagnet (2).

4. The PLC-based proportional electromagnet power supply control circuit according to claim 3, wherein an ammeter (6) is connected to a connection line of the output end of the follow current module (5) and the coil of the proportional electromagnet (2).

5. The PLC-based proportional electromagnet power control circuit as claimed in any one of claims 2-4, wherein the first resistor R1 and the second resistor R2 are resistors with 10K Ω, and the third resistor R3 is a resistor with 2K Ω.

6. The PLC-based proportional electromagnet power control circuit of claim 5, wherein the MOS transistor is a field effect transistor model CJU10N 10.