Category: Show case

A 2.2kW 220V 2-phase to 220V 3-phase Variable Frequency Drive (VFD) motor driver is a crucial component in industrial and commercial applications where precise control of motor speed and power efficiency are essential. 

This project is requested by an IOT company in Shenzhen, China, who wants a solution for their latest washing machine. The washing machine is designed to be used in the commercial field. It has much greater power than the typical family washing machine.

The VFD is designed to drive the motor. My workspace collaborated with 3 companies and over 10 engineers, designing, debugging, testing, and prototyping this product.

This is a project created as my start-up, and it is a finished project on IndieGoGo and BiliBili. The products were delivered 2023/08.

ADS | Indiegogo

ADS多功能云台，现已开始众筹_哔哩哔哩_bilibili

In this project, my works are: developing a controller board for the system, the CAD design for chassis and the mass production management.

For the electrical part, the ADS needs a camera, IR thermal camera inputs, servo, and motor driver. The board requires a web server to control the system and access the cameras’ view. We used dual webserver protocol (websocket, http) to achieve the goal.

For CAD part, I used Solidworks to design a beautiful chassis for ADS. here’s some photos. 

Mass production management was actually the most difficult part of this project. Although the amount of our products is still small, we still have to collaborate with many people and different companies. Considered assembling, packaging, and the product failure rate.

However, regarding all the hard work from the good partners and us, we successfully delivered our products at the end.

This research is my senior design project. The project is sponsored by Micron.

Research resistive RAM (ReRAM) memory cell arrays, focusing on unexpected behavior induced between neighboring cells in a crossbar architecture. Start by using previously designed infrastructure to heat a cell, while measuring the electrical characteristics of its neighboring cells. Then, analyze the results, investigating the cell array limitations. Finally, refine the measuring infrastructure, research goals, and analysis method. The resulting cell limitation analysis will provide a broader ReRAM understanding to progress the memory chip industry.

Based on FreePDK_45nm.

Remote humvee with 3d printed chassis, laser turret, micro controller with 2.4ghz wireless control.

detailed specs: stc15f 8bit micro controller, lc12s wireless module, l298n motor driver

Running Wall-E robot

This is an ongoing project (Nov 2022)

Working for the GTV project, the primary purpose of research is to find the relationship between the behavior of electronic charge in different types of liquid.

Since it is an ongoing industry research project for the company, details will not be shown.

This is an ongoing research project, for the CodeS lab located at Virginia Tech (Nov 2022)

The robot shown now is a testing model. I’m working on a bigger 3D model of NAO robot now. The new 3D model has 20 separate parts and they are movable。

It’s a 3d robot viewer and simulator created by PyQT5. Continue developing different parts’ positions, bonding relationships, and angle movement.

This software is developed for CodeS lab for Undergraduate research: Child robot theater. The research is to deliver an intuitive simulator of the robot on a computer to younger kids, giving children a sense of programing on the robot. education-related.

It’s a project meant to produce a product of an electrical drill. The circuit board is made by me. Powered by 24V and a buck converter TD8655, with an adjustable voltage using a potentiometer, the electrical drill can adjust its speed accordingly.

It’s a finished project for Robot development for Robogrinder: an undergraduate engineering design team at Virginia Tech that competes in the DJI RoboMaster University Championship.

This circuit board is a digital power converter for charging or discharging the super capacitor. STM32 g474 is used as the main controller to provide a precise wave (up to 5.4ghz) to switch MOSFET. Several OPAMP circuits provide the information of input current and voltage to MCU for PID and type3(improvement PID) algorithm.

This project is developed from an old project also for Robogrinder.

Robogrinder: two-stage buck-boost-boost DCDC converter with stm32g474, constant power enable

A super capacitor board is made for the competition as well. 10 super capacitors are implemented and safety circuits for each capacitor to prevent over-charging are on the board.

The product has been delivered to the club and installed on various robots. These designs were tested and proved in the competition 2023: They were very reliable and power efficient.