CN217563561U

CN217563561U - 485 communication circuit recloses

Info

Publication number: CN217563561U
Application number: CN202221654368.6U
Authority: CN
Inventors: 王勇
Original assignee: Wenzhou Xianghua Intelligent Technology Co ltd
Current assignee: Wenzhou Xianghua Intelligent Technology Co ltd
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2022-10-11
Anticipated expiration: 2032-06-29

Abstract

The utility model relates to a 485 communication circuit recloses, include: through electrical connection's main control chip, the 485 chip, motor drive chip, the 485 chip is used for communication, the 485 chip passes through J2 binding post connection communication line, the communication line is connected to the 6 th of 485 chip respectively through resistance, 7 pin, the 14 th pin at main control chip is connected to the 1 st pin of 485 chip, the 15 th pin at main control chip is connected to the 4 th pin of 485 chip, reach the purpose of giving main control chip from J2 binding post transmission data, the 3 rd pin at motor drive chip is connected to the 5 th pin of main control chip, the 2 nd pin at motor drive chip is connected to the 6 th pin of main control chip, motor drive chip's 6 th, 7 pins are connected respectively at the motor both ends, make main control chip control motor corotation, the reversal. The anti-interference capability is strong, and the device is suitable for remote control; the reliability of power supply is improved, the frequency of line power failure is reduced, and the stability of parallel operation of the power system can be improved.

Description

485 communication circuit recloses

Technical Field

The utility model relates to a serial ports communication technology field, more specifically say, relate to a 485 communication circuits reclose.

Background

After the overhead line fault is cleared, closing the circuit breaker in a short time, namely reclosing and reclosing; reclosing is one of the self-recovery power supply methods commonly employed in operation, since in practice most overhead line faults are transient or temporary. The shortest allowable interval time of the reclosing is 0.15-0.5 second. And in few cases, the automatic reclosing device is in permanent fault, and then is tripped out by relay protection after acting, the reason is found out, and then the power is transmitted again. This must be considered for the oil circuit breaker, because the first trip is performed under the unfavorable condition that the insulation strength of the oil is reduced by the action of the arc, and the second trip after the reclosing is performed under the unfavorable condition that the insulation is reduced, so that the breaking capacity of the oil circuit breaker is reduced to some extent (generally to about 80%) after the reclosing is adopted.

Most reclosing control circuits are manual, manual switching-on and manual switching-off are needed, and personnel are inconvenient to enter into operation in some dangerous places.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the foretell defect of prior art, provide a reclosing 485 communication circuit, include:

through electrical connection's main control chip, the 485 chip, motor drive chip, the 485 chip is used for communication, the 485 chip passes through J2 binding post connection communication line, the communication line is connected to the 6 th of 485 chip respectively through resistance, 7 pin, the 14 th pin at main control chip is connected to the 1 st pin of 485 chip, the 15 th pin at main control chip is connected to the 4 th pin of 485 chip, reach the purpose of giving main control chip from J2 binding post transmission data, the 3 rd pin at motor drive chip is connected to the 5 th pin of main control chip, the 2 nd pin at motor drive chip is connected to the 6 th pin of main control chip, motor drive chip's 6 th, 7 pins are connected respectively at the motor both ends, make main control chip control motor corotation, the reversal.

Preferably, the circuit further comprises a separating brake detection switch, wherein the separating brake detection switch is connected to the 3 rd pin of the main control chip and is used for detecting whether the motor is separated from the brake.

Preferably, the circuit further comprises a closing detection switch, and the closing detection switch is connected to the 2 nd pin of the main control chip and is used for detecting whether the motor is completely closed.

Preferably, the main control chip is HR7P169.

Preferably, the 485 chip is SP485.

Preferably, the motor driving chip is RA62892021.

Implement the utility model discloses a 485 communication circuit recloses has following beneficial effect: the communication 485 circuit has strong anti-interference capability and is suitable for remote control; the reliability of power supply is greatly improved, the times of power failure of the line are reduced, and the method is particularly remarkable for a single-circuit line of a unilateral power supply; reclosing is adopted on the high-voltage transmission line, so that the stability of parallel operation of the power system can be improved; in the design and construction process of a power grid, due to the consideration of the action of reclosing, a double-circuit line can be temporarily erected in some cases, so that the investment is saved; the device can also play a role in correcting the error tripping caused by poor mechanism or relay protection misoperation of the circuit breaker. For the economic benefit of reclosure, the national economic loss caused by power failure when reclosure is not available should be used for measurement. The investment cost is low, the work is reliable, and therefore, the method can be widely applied to power systems.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts. The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a circuit diagram of a main control chip in a 485 communication circuit of the reclosing switch of the utility model;

fig. 2 is a circuit diagram of a 485 chip in the 485 communication circuit of the reclosing switch of the utility model;

fig. 3 is the circuit diagram of the motor driving chip in the 485 communication circuit of the reclosing switch of the utility model.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Fig. 1 is a circuit diagram of a main control chip in a 485 communication circuit of the reclosing switch of the utility model; fig. 2 is a circuit diagram of a 485 chip in the 485 communication circuit of the reclosing switch of the utility model; fig. 3 is the circuit diagram of the motor driving chip in the 485 communication circuit of the reclosing switch of the utility model. Please refer to fig. 1-fig. 3, in the utility model provides a reclosure 485 communication circuit, at least, main control chip through electrical connection, the 485 chip, the motor driver chip, the 485 chip is used for communication, the 485 chip passes through J2 binding post and connects the communication line, the communication line is connected to the 6 th of 485 chip respectively through resistance, the 7 th pin, the 14 th pin at main control chip is connected to the 1 st pin of 485 chip, the 15 th pin at main control chip is connected to the 4 th pin of 485 chip, reach the purpose of giving main control chip from J2 binding post transmission data, the 3 rd pin at motor driver chip is connected to the 5 th pin of main control chip, the 2 nd pin at motor driver chip is connected to the 6 th pin of main control chip, motor driver chip's 6 th, the 7 th pin is connected respectively at the motor both ends, make the corotation of main control chip motor, the reversal.

In order to detect whether the opening is finished and ensure that the communication circuit is safer, the circuit further comprises an opening detection switch, and the opening detection switch is connected to the 3 rd pin of the main control chip and used for detecting whether the opening of the motor is finished.

In order to detect whether the closing is finished or not and ensure that the communication circuit is safer, the circuit further comprises a closing detection switch, and the closing detection switch is connected to the No. 2 pin of the main control chip and used for detecting whether the closing of the motor is finished or not.

The master control chip may be, but is not limited to, HR7P169. This example will be described with HR7P169 as an example. The 3 rd pin of the main control chip U5 is connected with one end of the opening detection switch S2, the 2 nd pin of the main control chip U5 is connected with one end of the closing detection switch S3, and the other end of the opening detection switch S2 and the other end of the closing detection switch S3 are connected and are all grounded. The 12 th pin of the main control chip U5 is connected with the 2 nd pin of the connecting terminal J1, and the 13 th pin of the main control chip U5 is connected with the 1 st pin of the connecting terminal J1.

The 485 chip may be, but is not limited to, SP485. The communication 485 chip can be changed into other communication chips, such as a serial port chip and the like. The 8 th pin of the communication 485 chip U6 is connected with one end of the resistor R20, and the 5 th pin of the communication 485 chip U6 is connected with one end of the resistor R21 and grounded. The other end of the resistor R20 is connected with the 7 th pin of the communication 485 chip U6, one end of the resistor R23 and one end of the resistor R22 respectively.

The motor driver chip may be, but is not limited to, RA62892021. This example will be described with RA62892021 as an example. The 8 th pin of the motor driving chip U4 is connected to one end of the capacitor C9 and the negative electrode of the motor MG1, respectively, and the other end of the capacitor C9 is connected to the 6 th pin of the motor driving chip U4 and the positive electrode of the motor MG1, respectively.

After a switching-off instruction is sent to the J2 wiring terminal, the communication 485 chip U6 transmits data to the U5 main control chip, then the main control chip U5 controls the motor driving chip U4 to control the motor to rotate forwards, and after the motor touches the switching-off detection switch S2, the main control chip U5 controls the motor driving chip U4 to stop, so that the switching-off instruction is realized.

After a closing instruction is sent to the J2 wiring terminal, the communication 485 chip U6 transmits data to the main control chip U5, then the main control chip U5 controls the motor driving chip U4 to control the motor to rotate reversely, and after the motor touches the closing detection switch S3, the main control chip U5 controls the motor driving chip U4 to stop, so that the action of the closing instruction is realized.

The utility model discloses a design of above embodiment, its beneficial effect is: the communication 485 circuit has strong anti-interference capability and is suitable for remote control; the reliability of power supply is greatly improved, the frequency of line power failure is reduced, and the method is particularly remarkable for a single-circuit line of a single-side power supply; reclosing is adopted on the high-voltage transmission line, so that the stability of parallel operation of the power system can be improved; in the design and construction process of a power grid, due to the consideration of the action of reclosure, double-circuit lines can be temporarily erected to save investment; the device can also play a role in correcting the error tripping caused by the poor mechanism or the relay protection misoperation of the circuit breaker. For the economic benefit of reclosure, the national economic loss caused by power failure when reclosure is not available should be used for measurement. The investment cost is low, the work is reliable, and therefore, the method can be widely applied to power systems.

While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention. Furthermore, to adapt to the particular situation of the technology of the present invention, it is possible to make numerous modifications to the present invention without departing from its scope of protection. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. The utility model provides a reclosing 485 communication circuit which characterized in that includes:

through electrical connection's main control chip, the 485 chip, motor driver chip, the 485 chip is used for communication, the 485 chip passes through J2 binding post connection communication line, the communication line is connected to the 485 chip's 6 th respectively through resistance, 7 pins, the 14 th pin at main control chip is connected to the 1 st pin of 485 chip, the 15 th pin at main control chip is connected to the 4 th pin of 485 chip, reach the purpose of giving main control chip from J2 binding post transmission data, motor driver chip's 3 rd pin is connected at motor driver chip's 5 th pin to main control chip's 5 th pin, motor driver chip's the 2 nd pin is connected at motor driver chip's 6 th pin, motor driver chip's 6 th, 7 pins are connected respectively at the motor both ends, make main control chip control motor corotation, the reversal.

2. The reclosing 485 communication circuit of claim 1, wherein the circuit further comprises an opening detection switch, the opening detection switch is connected to the 3 rd pin of the main control chip and is used for detecting whether the opening of the motor is completed.

3. The reclosing 485 communication circuit of claim 1, further comprising a closing detection switch, wherein the closing detection switch is connected to the 2 nd pin of the main control chip and is used for detecting whether the motor is closed or not.

4. The reclosing 485 communication circuit according to any one of claims 1 to 3, wherein the master control chip is HR7P169.

5. The reclosure 485 communication circuit of any one of claims 1 to 3, wherein the 485 chip is SP485.

6. The reclosure 485 communication circuit of any one of claims 1 to 3, wherein the motor driver chip is RA62892021.