Project

# Title Team Members TA Documents Sponsor
18 PowerBox Technology Power Meter
 Abraham Benzaquen Garcia
Arisa Aramratsameekul
Frank Lu
 Jason Jung design_document1.pdf
design_document2.pdf
proposal1.pdf
proposal2.pdf
 PowerBox Technology
# PowerBox Technology Power Meter

Team Members:
- Abraham Benzaquen (ADB9)
- Arisa Aramratsameekul (arisaa2)
- Frank Lu (yuzhelu2)

# Problem

This team will work under the supervision of Oscar Castillo, the founder of PowerBox Technology, in order to create a power meter for the PowerBox. This power meter is to be used in an industrial setting, ensuring that the high-power machinery receives a consistent, clean source of energy. The purpose of this project is to resolve the common industrial problem of having unstable power for heavy machinery. In a large factory, for example, a power outage can cause hours of downtime and thousands of dollars to be lost.

# Solution

Our solution will be to create a power meter. This power meter will connect to the 3-phase output of an inverter and will be used to measure the 3-phase RMS current / voltage, real power, reactive power, and apparent power. The voltage/current will also get stepped down and outputted to be used as an instruction signal for a DSP. All of our data will be recorded for use in optimizing power delivery to the machinery that requires it.

# Solution Components

## Subsystem 1

### RMS Voltage Measurement Circuit
The RMS voltage measurement circuit uses the output of the inverter to measure the three-phase voltage. This and the AC current measurement circuit will be used to calculate the real power, reactive power, and apparent power. This circuit will also step down the voltage and output three analog signals to the digital signal processor. This high voltage will be stepped down to a value that can be outputted as signal through the use of a PCB step down transformer. In order to safely do this, we will also incorporate regulators and protection circuits.

## Subsystem 2
### AC Current Measurement Circuit
The current for the three phases will be going through current transformers, then to the AC current measurement circuit. The current transformer is used to accurately monitor the current while not damaging the equipment with the high current flow. The AC current measurement circuit and the RMS voltage measurement circuit will be used to calculate the real power, reactive power, and apparent power. The circuit will also step down the current and output three analog signals to the digital signal processor. The current transformer is given in this project, but we will have to set the current limits. We will include circuitry that will ensure that the stepped down values are clean and accurate. These may include: precision regulators, overcurrent protection, and low pass filters.

## Subsystem 3
### Power Calculation
This part of the interface board will take the voltage and current from the previous circuits and calculate real power, reactive power, and apparent. The power data will be recorded. This could be done with an Arduino board and the power data could be stored in registers for the other software to use if necessary.

## Subsystem 4
### Communication Protocol
In this subsystem, we will use a communication protocol like Modbus TCP to transmit power data (real power, reactive power, and apparent power) from the power meter to the Power Node. Modbus TCP is a well-established protocol in industrial environments and provides a reliable solution for data transmission. The Arduino board (or an equivalent microcontroller) will be equipped with an Ethernet shield to support TCP/IP communication. This microcontroller will interface with the power calculation circuit to collect power data while the Ethernet connection will facilitate communication using Modbus TCP. The Arduino will act as a Modbus TCP server that regularly updates power parameters, sending data in response to requests from the Modbus TCP client of the Power Node.

# Criterion For Success

The power meter should take the input of three-phase high voltage and three-phase current from the inverter to accurately measure the real power, reactive power, and per-phase voltage and current of the machine. The meter should also output the correct stepped-down three-phase analog voltage and current to the digital signal processor. In addition to the proper outputs, the meter should be reliable in its consistency of accurate measurements and reasonably cost-effective for production and usage.

Cypress Robot Kit

Todd Nguyen, Byung Joo Park, Alvin Wu

Cypress Robot Kit

Featured Project

Cypress is looking to develop a robotic kit with the purpose of interesting the maker community in the PSOC and its potential. We will be developing a shield that will attach to a PSoC board that will interface to our motors and sensors. To make the shield, we will design our own PCB that will mount on the PSoC directly. The end product will be a remote controlled rover-like robot (through bluetooth) with sensors to achieve line following and obstacle avoidance.

The modules that we will implement:

- Motor Control: H-bridge and PWM control

- Bluetooth Control: Serial communication with PSoC BLE Module, and phone application

- Line Following System: IR sensors

- Obstacle Avoidance System: Ultrasonic sensor

Cypress wishes to use as many off-the-shelf products as possible in order to achieve a “kit-able” design for hobbyists. Building the robot will be a plug-and-play experience so that users can focus on exploring the capabilities of the PSoC.

Our robot will offer three modes which can be toggled through the app: a line following mode, an obstacle-avoiding mode, and a manual-control mode. In the manual-control mode, one will be able to control the motors with the app. In autonomous modes, the robot will be controlled based off of the input from the sensors.