【ART-Pi】Power supply direction: high current bidirectional DC/DC converter

Use nonlinear control algorithm to improve the charging and discharging switching speed of the bidirectional DCDC converter. Is the low voltage an energy storage battery, and the high voltage side is the DC bus or electrical load.

It is my master's project. I have used Dspace to implement verification before. Now I have the opportunity of art-PI to make a physical object. The core is the charging and discharging algorithm, and it is equipped with a GUI touch screen operation human-computer interaction interface.

Function 1: The bidirectional current sampling part uses la25 Hall sensor to collect current, and at the same time, the basic principle of increasing the sampling voltage based on Kilhall's current law is shown in Figure 1 below. Figure 1: Principle of voltage increase

The relevant parameters used in this design are shown in Figure 2 r1=20K r2=20K r3=15K * Vout=1.5V+0.4 Vin ** Figure 2 The design parameters used in this design

Function 2: Voltage sampling uses LV25p sampling. A sliding rheostat is installed to more flexibly adjust the sampling ratio.

Function 3: Two-channel IGBT driving PWM signal with dead zone protection uses IC. Domestic Luo Muyuan chip dead zone signal isolation IC: Luo Muyuan TX-QP102

Two isolated power supply voltage ICs required for igbt drive: Luomuyuan TX-PD203 DC/DC drive power supply

igbt driver IC: KA962

The board is working well. The board made in the laboratory before is as follows. Taobao store purchase link https://item.taobao.com/item.htm?spm=a1z10.1-c.w4004-1357102896.4.33285f8b6PA7Mn&id=8065001635