Written before the official account - QT, ARM, DSP, microcontroller, power electronics and transmission!

Section 1: Why do you want to be a public account

Search for many public accounts on WeChat, keywords: QT, microcontroller, DSP, power electronics and power transmission, switching power supply hardware design, signal acquisition, communication technology (CAN, I2C, UART, SPI, ETHERNET), LoRa, MatlabEtc., most of them are not particularly close to the system level and detail level, that is to say, there is no special professional explanation about the large program system, power electronic system, small specific program design, hardware circuit construction, and no review from a certain height.This knowledge about electricity (I stand at a very low height, and I am also a rookie in the eyes of Daniel).So I want to take the opportunity of using QT now to explain the knowledge I have learned in different categories, for colleagues who learn to write code and power electronic hardware to discuss and make progress together.

Note: The WeChat public account cannot be applied for these days. After August, you can apply for the public account. At that time, the QR code of the public account will be posted.

Section 2: Experience

Having studied power electronics and electric drive for ten years, from undergraduate to postgraduate to Ph.D., I have a general understanding of the entire power grid system, and a little knowledge.At the same time, I have been working in power electronics for 7 years, and now I have switched to the control field (almost the front end of the power system: acquisition).dabble.

In school: The basic things for undergraduates are single-chip microcomputer, power electronics, electric drive, digital, analog, and C language.Graduate students started working on converters, and they were still converters during their Ph.D., but all the knowledge was in books, and the entire knowledge framework was not systematically examined.

At work: First, I made a converter and controlled the synchronous motor. Everything was done by others, just learning.Then start to be familiar with the entire converter system, the underlying DSP control, CAN communication and so on.Later, I started to write the converter control program by myself, line by line of my own code, and debug one circuit by one circuit.Then start moving towards front-end acquisition and communication.

Now to sum up, what I have done, I should have studied it well (this is an impossible thing, the process is also very painful, and most of it is not voluntary).

1. Communication:

CAN communication, SPI communication, UART serial communication, ETHERNET communication, IIC communication, LoRa communication.Almost all common communications on ARM and DSP have been done over and over (of course, there are many things that have not been covered, the vision is only here, and the others have not been used yet).

Of course the corresponding hardware: serial port, RS232, TTL, RS485.There are also corresponding protocols: MODBUS_TCP, MODBUS_RTU and other protocols written by themselves.

2. Using the microcontroller:

Basic 2812, 28335, 6748, etc., later C409, and then later STM32 series 407, 103, H750.They are also used directly, and later also used HAL library and FREERTOS, THREAD, UCOS.Of course, the previous 51 must have been used.

3. Software aspects

This part is more, let's talk slowly!

MATLAB is a must for power electronics. I lived on this during school, and of course, there is a simpler PSIM.

keilC of 51 microcontroller.

The multisim, LT, labview of circuit simulation, protell and DXP of circuit drawing board are now domestically produced.

Reports visio for drawing.

Until later MDK, CCS, IAR, etc., Q2 for FPGA and CPLD.

QT for display.

Of course, there are network port assistants, serial port assistants, modbuspoll, CAN analysis assistants, virtual serial ports, etc.

Of course, I don't know any software that computers use to write programs, such as python, vc, vs, etc., which are interlaced like mountains. I wanted to switch to linux at first, but I found that talent and effort were insufficient, and every time I gave up halfway.

3. Power electronics hardware

This part is almost all analog circuits. I have done power supply design before, such as single-phase rectifier circuit, three-phase rectifier circuit, BOOST circuit, filter circuit, signal acquisition circuit (AC acquisition, DC acquisition, filter circuit), etc., and alsoThere are direct-use chips, such as 3854, 3845 PFC circuits.Of course, the other circuits in the converter were also done one by one, and they were not as good as others (ashamed to say, they have not been improved).

Section 3: Write to the end

In short, I want to learn what I have learned, guide beginners, communicate with peers, and ask seniors for advice.Contribute to the power electronics industry and programming industry!