CN204086418U - High voltage converter monitor apparatus - Google Patents

Abstract

The utility model provides a high-voltage frequency converter monitor device, which comprises a main control board (1), a liquid crystal display (3) and membrane buttons (2), and the main control board (1) has a controller (4); The liquid crystal display (3) is a 240*120 pixel liquid crystal screen using parallel bus communication, which is used to display the relevant operating parameters of the frequency converter; the thin film button (2) is used to set the relevant parameters of the frequency converter; the main control The board (1) adopts STM32F103ZE of ST Company, which has the functions of time display and parameter storage, and communicates with other devices (5) through RS485 and SPI interfaces. Compared with the prior art, the utility model has the characteristics of simple external wiring and low cost.

Description

High-voltage inverter monitor device

technical field

The utility model belongs to the field of frequency converter parameter setting and monitoring devices, in particular to a parameter setting and monitoring device on a high-voltage frequency converter, which can set related parameters of the frequency converter, monitor the running state of the frequency converter and interact with other equipment data.

Background technique

At present, the high-voltage inverter monitor usually adopts the touch screen mode, which collects and displays the data through the touch screen. However, this method must be equipped with a processor such as a PLC (programmable logic controller) to process and control the data, and the cost is relatively high.

The purpose of the utility model is to overcome the defect of high cost in the prior art, and as an alternative, provide a high-voltage frequency converter monitor device that does not need a touch screen and does not need to be equipped with a PLC.

Utility model content

The technical solution of the utility model is a high-voltage frequency converter monitor device, which is characterized in that it includes a main control board (1), a membrane button (2) and a liquid crystal display (3), and the main control board (1) has a control device (4); the liquid crystal display (3) is a liquid crystal screen using parallel bus communication for displaying the relevant operating parameters of the high-voltage frequency converter; the membrane button (2) is used for setting the relevant parameters of the high-voltage frequency converter; the main The control board (1) has the functions of time display and parameter storage, and communicates with other devices (5) through RS485 and SPI interfaces.

As a technical solution to replace the existing high-voltage frequency converter monitor device, since the touch screen is abolished, and there is no need for processors such as PLC (programmable logic controller) with high cost and complicated wiring, the original function is maintained. On the other hand, it has the characteristics of low cost and small size.

Description of drawings

Fig. 1 is a structural block diagram of a high-voltage frequency converter monitor device of the present invention.

Detailed ways

The high-voltage frequency converter monitor device of the present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation cases.

As shown in Figure 1, the high-voltage inverter monitor device is used to set the relevant parameters of the high-voltage inverter and monitor the operating status of the inverter. The whole system consists of three parts, the main control board 1, the membrane button 2, and the liquid crystal display 3. The liquid crystal display 3 is adjustable in grayscale, 240*120 pixels, with a liquid crystal controller and the data transmission mode is parallel transmission, and its function is to display the relevant operating parameters of the high-voltage inverter. Membrane key 2 is used to set the relevant parameters of the high-voltage inverter. It adopts the silver paste key with shrapnel, which is characterized by good key feel and long service life. The main control board 1 is the core of the microcomputer protection device of the high-voltage frequency converter, which has the functions of time display and parameter storage. The socket connected with other equipment 5 adopts RJ45 and RJ11, and uses RS485 and SPI interface for communication.

The high-voltage frequency converter monitor device sets relevant parameters through the membrane button 2, and the parameters can be displayed on the liquid crystal display 3 and stored in the EEPROM on the main control board 1. This parameter can also be sent through SPI and RS485 after being processed by the controller 4 to perform data interaction with other devices 5 .

In the high-voltage frequency converter monitor device of this embodiment, the controller 4 of the main control board 1 adopts the chip STM32F103ZE, LQFP144 package, this chip uses 3.3V power supply, has rich SPI communication and 485 communication peripherals, and has Features such as fast running speed.

Both the liquid crystal display 3 and the membrane button 2 are connected to the main control board 1 through a flat cable (parallel data bus, flat cable). When the membrane button 2 is pressed, the button key value is quickly transmitted to the controller 4 of the main control board 1 through the flat cable. The controller 4 of the main control board 1 checks in real time whether the membrane button 2 is pressed, and the internal program determines which one The function key is pressed, and the key value of the key pressed at this time is judged. After the function of the key is determined, the corresponding selection and addition and subtraction are made according to the preset settings. The data set by the membrane key 2 is transmitted to the display on the liquid crystal display 3.

There is a shielding net on the membrane button 2, and the shielding net can be connected to the grounding metallization hole on the main control board 1. The grounding metallization hole leads the ground wire to the cabinet of the cascaded high-voltage inverter through the RJ45 shielded plug. Thereby shielding from external interference.

The relevant operating parameters of the high-voltage frequency converter in the controller 4 of the main control board 1 are displayed by the liquid crystal display 3 . In addition, in addition to displaying the operating parameters of the high-voltage inverter and the current time on the LCD 3, some parameters that need to be set are also displayed on the LCD. By identifying the key codes of the buttons, they correspond to their functions. The position and parameters will be selected or other corresponding actions will be taken, and the parameters will be confirmed after pressing the OK key when setting the parameters. The parameters are stored on the memory chip of the main control board 1 .

In this embodiment, since the controller 4 on the main control board 1 adopts STM32F103ZE, it has a main frequency of 72M, multiple SPI and 485 interfaces. So its processing speed and communication interface are very rich. The memory chip also uses SPI communication. And because of its high-speed computing and communication capabilities, it can highlight the superiority of improved products. It can quickly store the set parameters, and through the high-speed communication port SPI and 485 interface, the parameters of the high-voltage inverter monitor and other Device 5 is synchronized.

Compared with the prior art, which uses a touch screen, PLC and other processors to process data, it can achieve low cost and small volume on the basis of maintaining the original functions.

The above description is only a preferred embodiment of the utility model, and is not intended to limit the utility model. As long as it is within the spirit and principles of the utility model, any modifications, equivalent replacements, improvements, etc., should be included in the Within the protection scope of the present utility model.

Claims (5)

1. A high-voltage frequency converter monitor device, is characterized in that, comprises main control board (1), film button (2) and liquid crystal display (3), and described main control board (1) has controller (4); The liquid crystal display (3) is a liquid crystal screen using parallel bus communication, which is used to display the relevant operating parameters of the high-voltage frequency converter; the membrane button (2) is used to set the relevant parameters of the high-voltage frequency converter; the main control board (1) It has the functions of time display and parameter storage, and communicates with other devices (5) using RS485 and SPI interfaces. 2. The high-voltage frequency converter monitor device according to claim 1, characterized in that, the controller (4) is STM32F103ZE of ST Company, which is packaged in LQFP144. 3. The high-voltage frequency converter monitor device according to claim 1, characterized in that, both the liquid crystal display (3) and the membrane button (2) are connected to the main control board (1) through a flat cable. 4. The high-voltage frequency converter monitor device according to claim 1, characterized in that there are sockets RJ45 and RJ11 on the main control board (1) for connecting with other devices (5). 5. The high-voltage frequency converter monitor device according to claim 1, characterized in that, the relevant parameters are set through the membrane button (2), and the parameters can be displayed on the liquid crystal display (2) and stored on the main control board (1) on the EEPROM, the parameter is sent by the controller (4), and other devices (5) perform data interaction through SPI and RS485 interfaces.