Impulse Generator Control Module

Mid-Semester Presentation

Team Members

Phillip DillonElectrical Engineering

Team Leader

Francis TranElectrical Engineering

Calvin LiuElectrical Engineering

John FordComputer Engineering

Mohieldeen AbdelrahmanElectrical Engineering

Dr. Masoud KarimiFaculty Advisor

• Background• Problem• Solution• Constraints• Approach• System Overview• Subsystems• Timeline• Progress• References

[1]

Outline

• What is an Impulse Generator Control Module?• What is an Impulse Generator?

• Apparatus which produces short high-voltage surges.• Capacitors charge in parallel and discharge in series into a test

object.• These surges are used to test electrical power equipment.

• Impulse Generator Control Module:• Measures/adjust charging voltage• Measures/adjust the spark gap distance

Background

The Marx high impulse generator in MSU’s High Voltage Lab (HVL) is currently controlled using analog gauges at

an outdated manual control panel.

Problem

Create a digital control module for an impulse generator that can be easily used and

implemented into an existing control system similar to the one in the MSU’s High Voltage Lab.

Solution

Name Description

Power Requirement The power supply must operate on 120VAC.

Voltage Measurement The peak voltage measurement must be accurate within 3% error.

Spark Gap Control The spark gap control must operate within +/- 2mm.

Humidity Measurement The humidity must be measured over the range of 20% to 90% relative humidity and must be within an accuracy of +/- 5% relative humidity.

Temperature Measurement The surrounding air temperature must be measured within the range of 0 to 50° Celsius and must be within an accuracy of +/- 2° Celsius.

Technical Constraints

The control module must be compatible with future modifications, renovations, or

replacements of the impulse generator.

Practical Constraints: Sustainability

The control module must be able to detect any faults it could cause and must be able to report this to the user, as well as signaling the failure to any other sub-systems

that require such signaling.

Practical Constraints: Health and Safety

Microcontroller Pros Cons

PIC33

• Cost: $1.57 • 20 Pins• Clock Speed:

7.37MHz• Close Source

Arduino Due

• Clock Speed: 84MHz• 12 Analog Input Pins• Open Source• 512Kb Flash Memory

• Cost: $48.74

Arduino Uno• Cost: $24.51• Open Source

• Clock Speed: 16MHz• 32Kb Flash Memory• 14 Digital I/O Ports

Approach: Microcontroller

Pic33 Arduino Due Arduino Uno

Approach: Microcontroller

[2] [3] [4]

Motors Pros Cons

HT34-488• High Torque• 1.8 Degree Step

Angle

• Cost: $363• 4.25 A/phase

Airpax LB82773-M1• 800mA Drive Current• Cost: $29.99

• Low Torque• 7.5 Degree Step

Angle

SM42HT47-1684B• 1.8 Degree Step

Angle • Low Drive Current• Cost: $9

• Double Shaft

Approach: Motors

]

HT34-488 Step Motor

Airpax LB82773-M1 Step Motor

SM42HT47-1684B Step Motor

Approach: Motors

[5] [6] [7]

Sensors Pros Cons

SHT10• -40° to 123° C• 0.5° C Accuracy• Compatible With Arduino

• Cost

DHT11• Cost• Arduino Compatible• IEEE standard 4-1995 [11]

• 0° to 50° C• 2° C Accuracy

DHT22• -40° to 80° C• 0.5° C Accuracy

• Cost

Approach: Sensors

DHT11SHT10 DHT22

Approach: Sensors

[8] [9] [10]

Control Module

Sphere GapControl

VoltageControl

User InputAtmosphericConditions

Computer

Power

System Overview

Spark Gap

Motor

Subsystem: Spark Gap Control

+

Stepper Motor Variac

[12]

[13]

Subsystem: Voltage Control

Timeline

Effective Teaming

Phillip Calvin John Mohieldeen Francis

Spark Gap Control X X X

Voltage Control X X X

Microcontroller X X

Testing and Debugging X X X X X

Power Supply X X X

Atmospheric Sensors X X X

Progress

January:• Research• Ordered Parts

February/March:• Research• Ordered Parts• Prototype for testing

[1] Marx High Impulse Generator. [Online]. Available:http://www.ece.msstate.edu/hvl/research.html[2] PIC33. [Online]. Available:http://www.elmotex.de/bauelemente-aktiv/mikroprozessoren-und-peripherie/microchip-dspic33---controller/pic-33-fj-12-mc-202-i-sp.php[3] Arduino Due. [Online]. Available:http://www.arduino.cc/en/Main/arduinoBoardDue[4] Arduino Uno. [Online]. Available:http://www.arduino.cc/en/Main/arduinoBoardUno[5] HT34-488 Step Motor. [Online]. Available:http://www.applied-motion.com/products/stepper-motors/ht34-488[6] Airpax Step Motor. LB82773-M1. [Online]. Available:http://wiki.t-o-f.info/Arduino/ExempleMoteur%C3%80PasBipolaireEtSN754410[7] SM42HT47-1684B Step Motor. [Online]. Available:http://www.smartautomation.com.cn/ProductShow.asp?ArticleID=497

References

[8] SH10. [Online]. Available:http://learn.linksprite.com/arduino/shields/sht-10-digital-temperature-and-humidity-sensor/[9] DHT11. [Online]. Available:http://www.adafruit.com/product/386[10] DHT22. [Online]. Available:http://www.adafruit.com/product/385[11] IEEE Standard 4. [Online]. Available:http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=573333&filter%3DAND%28p_Publication_Number%3A4330%29[12] Large Stepper Motor. [Online]. Available:http://www.applied-motion.com/products/stepper-motors/ht34-488[13] Variac. [Online]. Available:http://www.circuitspecialists.com/variacs

Impulse Generator Control Module

Mid-Semester Presentation