CN210666443U

CN210666443U - Induction heating power supply digital communication control system

Info

Publication number: CN210666443U
Application number: CN201922232710.8U
Authority: CN
Inventors: 段小强; 洪涛; 田冀达
Original assignee: ZHENGZHOU KECHUANG ELECTRONIC CO Ltd
Current assignee: ZHENGZHOU KECHUANG ELECTRONIC CO Ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-06-02
Anticipated expiration: 2029-12-13

Abstract

The utility model discloses a digital communication control system of induction heating power, including induction heating power, power CPU, analog-to-digital conversion module, power alarm module, analog input module, host computer and conversion chip circuit, analog input module and analog-to-digital conversion module are connected, and analog-to-digital conversion module and power CPU connect, and power CPU respectively with induction heating power, power alarm module and conversion chip circuit connection, conversion chip circuit passes through RS485 bus and host computer connection. The utility model provides an operation interface of the upper computer in the digital communication control system of the induction heating power supply has the visual function, the operation is simple, and the user can conveniently control the induction heating power supply; the accuracy of controlling the induction thermoelectric power supply is high, digital communication control is adopted, all control quantities are input by a communication system, and other interferences are avoided; and the ModBus protocol is adopted, so that the application is mature, the debugging is relatively simple, and the follow-up maintenance is facilitated.

Description

Induction heating power supply digital communication control system

Technical Field

The utility model belongs to the induction heating field, concretely relates to digital communication control system of induction heating power.

Background

Induction heating is widely used in a plurality of industrial fields because of its characteristics of environmental protection, high efficiency, easy control, safety and reliability, etc. The basic principle is as follows: the three-phase alternating current power frequency voltage is subjected to uncontrolled rectification and filtering to be used as direct current bus voltage. And triggering the power device to be conducted by using a switching signal with a certain frequency so as to generate an alternating current signal, and heating the conductor by using the high-frequency alternating current signal. A good induction heating power supply requires a good human-machine interface, i.e. a digital communication system. The control of the device by people is effectively realized through proper input and output devices. The machine provides relevant information and prompts to the user through an output or display device, and the user controls the device by inputting the relevant information.

SUMMERY OF THE UTILITY MODEL

To the demand among the above-mentioned prior art, the utility model aims at providing an induction heating power supply digital communication control system.

The purpose of the utility model is realized through the following technical scheme.

The utility model provides an induction heating power supply digital communication control system, includes induction heating power, power CPU, analog-to-digital conversion module, power alarm module and analog input module, and analog input module and analog-to-digital conversion module are connected, and analog-to-digital conversion module and power CPU are connected, and power CPU is connected with induction heating power and power alarm module respectively, still includes host computer and conversion chip circuit, power CPU and conversion chip circuit are connected, and conversion chip circuit passes through RS485 bus and host computer connection.

The conversion chip circuit comprises an ADM2587 chip, a fourth pin of the ADM2587 chip is connected with an input end of a power supply CPU, a fifth pin, a sixth pin and a seventh pin are all connected with an output end of the power supply CPU, a seventeenth pin and an eighteenth pin are respectively connected with an interface B and an interface A on an RS485 bus, and a thirteenth pin and a fifteenth pin are respectively connected with an interface Y and an interface Z on the RS485 bus; and an interface A on the RS485 bus is connected with an interface Y, and an interface B is connected with an interface Z.

The second pin of the ADM2587 chip is connected with 3.3V voltage, the first pin and the third pin are grounded, and a first capacitor and a second capacitor are connected in parallel between the second pin and the first pin or between the second pin and the third pin; an eighth pin of the ADM2587 chip is connected with 3.3V voltage, a ninth pin and a tenth pin are grounded, and a third capacitor and a fourth capacitor are connected in parallel between the eighth pin and the ninth pin or the tenth pin; a twelfth pin of the ADM2587 chip is connected with a VCC voltage, an eleventh pin is grounded, and a fifth capacitor and a sixth capacitor are connected in parallel between the twelfth pin and the eleventh pin; the nineteenth pin of the ADM2587 chip is connected with a VCC voltage, the twentieth pin is grounded, a seventh capacitor and an eighth capacitor are connected in parallel between the nineteenth pin and the twentieth pin, and the fourteenth pin and the sixteenth pin are grounded.

The power supply CPU is a DSP chip.

And the upper computer and the power supply CPU carry out data communication processing through a ModBus protocol.

The utility model has the advantages that: the utility model provides an operation interface of the upper computer in the digital communication control system of the induction heating power supply has the visual function, the operation is simple, and the user can conveniently control the induction heating power supply; the accuracy of controlling the induction thermoelectric power supply is high, digital communication control is adopted, all control quantities are input by a communication system, and other interferences are avoided; and the ModBus protocol is adopted, so that the application is mature, the debugging is relatively simple, and the follow-up maintenance is facilitated.

Drawings

Fig. 1 is a schematic view of the structural connection of the present invention.

Fig. 2 is a schematic diagram of the connection of the conversion chip circuit of the present invention.

Fig. 3 is a schematic diagram of the connection between the practical upper computer and a plurality of induction heating power supplies.

Detailed Description

As shown in fig. 1, 2 and 3, the digital communication control system for the induction heating power supply is used for better controlling the induction heating power supply, and adjusting parameters of the induction heating power supply through communication between an upper computer and the induction heating power supply so as to control the power of the induction heating power supply. The induction heating power supply comprises an induction heating power supply, a power supply CPU, an analog-to-digital conversion module, a power supply alarm module, an analog input module, an upper computer and a conversion chip circuit, wherein the analog input module is connected with the analog-to-digital conversion module, the analog-to-digital conversion module is connected with the power supply CPU, the power supply CPU is respectively connected with the induction heating module and the power supply alarm module, the power supply CPU is connected with the conversion chip circuit, and the conversion chip circuit is connected with the upper computer through an RS485 bus. Preferably, the power supply CPU is a DSP chip, and data communication processing is carried out between the upper computer and the power supply CPU through a ModBus protocol.

As shown in fig. 3, there is more than one induction heating power source, and the upper computer can be connected with a plurality of induction heating power sources at the same time.

The analog input module is used for detecting the temperature of an object to be heated in the induction heating equipment (comprising an induction heating power supply and an induction heating coil), the water pressure, the inversion current and other numerical values in the induction heating equipment to generate a current signal value, the current signal value is converted into a voltage signal value through the analog conversion module, the voltage signal value is transmitted to the power supply CPU and processed through the power supply CPU, and when the power supply CPU detects that the numerical value exceeds the range and needs to give an alarm, the power supply CPU transmits an instruction to the power supply alarm module to give an alarm. Data communication transmission is carried out between the upper computer and the power supply CPU through a conversion chip circuit, a ModBus protocol and an RS485 bus, and finally control of the upper computer on the power supply CPU and the induction heating power supply is achieved. It should be noted that the induction heating power supply is the common general knowledge in the existing induction heating, and the analog input module, the analog-to-digital conversion module and the alarm module for collecting information of the induction heating power supply are the prior art in the field, and the utility model discloses no longer describe it in detail.

The level of the serial port communication input and output of the power supply CPU is TTL level, and the TTL level needs to be converted into 485 level through a conversion chip circuit during communication. The conversion chip circuit comprises an ADM2587 chip, the input and output signals of the DSP chip are converted into 485 levels through the ADM2587 chip, and meanwhile, the ADM2587 chip has an isolation function. It should be noted that, numbers 1 to 20 marked on the ADM2587 in fig. 2 refer to the first pin to the twentieth pin, respectively.

The second pin of the ADM2587 chip is connected with 3.3V voltage, the first pin and the third pin are grounded, and a first capacitor C1 and a second capacitor C2 are connected in parallel between the second pin and the first pin or the third pin; an eighth pin of the ADM2587 chip is connected with 3.3V voltage, a ninth pin and a tenth pin are grounded, and a third capacitor C3 and a fourth capacitor C4 are connected between the eighth pin and the ninth pin or the tenth pin in parallel; a twelfth pin of the ADM2587 chip is connected with a VCC voltage, an eleventh pin is grounded, and a fifth capacitor C5 and a sixth capacitor C6 are connected in parallel between the twelfth pin and the eleventh pin; the nineteenth pin of the ADM2587 chip is connected with a VCC voltage, the twentieth pin is connected with the ground, and a seventh capacitor C7 and an eighth capacitor C8 are connected between the nineteenth pin and the twentieth pin in parallel. The fourteenth pin and the sixteenth pin are grounded.

A fourth pin of the ADM2587 chip is connected with an input end of a power supply CPU, a fifth pin, a sixth pin and a seventh pin are all connected with an output end of the power supply CPU, a seventeenth pin and an eighteenth pin are respectively connected with an interface B and an interface A on an RS485 bus, and a thirteenth pin and a fifteenth pin are respectively connected with an interface Y and an interface Z on the RS485 bus; and an interface A on the RS485 bus is connected with an interface Y, and an interface B is connected with an interface Z.

The fourth pin, the fifth pin, the sixth pin and the seventh pin of the ADM2587 chip are all connected with a communication port of the CPU, data signals transmitted on an A interface and a B interface on the RS485 bus are converted and then input to the power supply CPU through the fourth pin, and the power supply CPU makes corresponding instructions according to the transmitted signals. And communication data signals output by the power supply CPU are sent to the fifth pin, the sixth pin and the seventh pin, are converted and then sent to the thirteenth pin and the fifteenth pin, and are transmitted to a Y interface and a Z interface on the RS485 bus.

The utility model discloses a working process does: when the induction heating power supply heats an object to be heated, the analog quantity input module detects data of the induction heating equipment and transmits the data to the power supply CPU through the analog-to-digital conversion module, the power supply CPU simultaneously detects the working state of the power supply, the working state comprises a starting and stopping state of the induction heating power supply, an external control signal and an alarm signal, and the alarm signal comprises alarm signals of water shortage, overheating, overcurrent and the like. The power supply CPU sends the signals including all the data detected by the analog input module to the ADM2587 chip in a data form, and the ADM2587 chip converts the data and sends the converted data to the RS485 bus. The host computer can receive data from the RS485 bus so as to obtain data such as a working state signal and an analog quantity signal of the induction heating power supply.

The above description is only a preferred embodiment of the present invention, and is not a limitation to the technical solution of the present invention, it should be noted that, further improvements and changes can be made by those skilled in the art on the premise of the technical solution of the present invention, and all such improvements and changes should be covered in the protection scope of the present invention.

Claims

1. The utility model provides a digital communication control system of induction heating power, includes induction heating power, power CPU, analog-to-digital conversion module, power alarm module and analog input module, and analog input module and analog-to-digital conversion module are connected, and analog-to-digital conversion module and power CPU connect, and power CPU is connected its characterized in that with induction heating power and power alarm module respectively: the power supply CPU is connected with the conversion chip circuit, and the conversion chip circuit is connected with the upper computer through an RS485 bus.

2. The digital communication control system of the induction heating power supply of claim 1, wherein: the conversion chip circuit comprises an ADM2587 chip, a fourth pin of the ADM2587 chip is connected with an input end of a power supply CPU, a fifth pin, a sixth pin and a seventh pin are all connected with an output end of the power supply CPU, a seventeenth pin and an eighteenth pin are respectively connected with an interface B and an interface A on an RS485 bus, and a thirteenth pin and a fifteenth pin are respectively connected with an interface Y and an interface Z on the RS485 bus; and an interface A on the RS485 bus is connected with an interface Y, and an interface B is connected with an interface Z.

3. The digital communication control system of the induction heating power supply of claim 2, wherein: the second pin of the ADM2587 chip is connected with 3.3V voltage, the first pin and the third pin are grounded, and a first capacitor and a second capacitor are connected in parallel between the second pin and the first pin or between the second pin and the third pin; an eighth pin of the ADM2587 chip is connected with 3.3V voltage, a ninth pin and a tenth pin are grounded, and a third capacitor and a fourth capacitor are connected in parallel between the eighth pin and the ninth pin or the tenth pin; a twelfth pin of the ADM2587 chip is connected with a VCC voltage, an eleventh pin is grounded, and a fifth capacitor and a sixth capacitor are connected in parallel between the twelfth pin and the eleventh pin; the nineteenth pin of the ADM2587 chip is connected with a VCC voltage, the twentieth pin is grounded, a seventh capacitor and an eighth capacitor are connected in parallel between the nineteenth pin and the twentieth pin, and the fourteenth pin and the sixteenth pin are grounded.

4. The digital communication control system of the induction heating power supply of claim 3, wherein: the power supply CPU is a DSP chip.

5. The digital communication control system of the induction heating power supply of claim 4, wherein: and the upper computer and the power supply CPU carry out data communication processing through a ModBus protocol.