Presented by: Mark Fraysier Richard Jennings 11/28/2012

 Testing equipment device for three-phase devices  Analyzes how efficiently machines operate using desired, created load.  Done by manipulating the power triangle

 Research of cost reduction  Communication between group members  Reassured what our efforts would be during the beginning of EE 481

 We met with Dr. Famouri  Dr. Famouri suggested us to get rid of all systems except  AC Switches  DC Chopper  Microprocessor  Drive Circuits  Zero Crossing Detector  Filters  This dramatically reduced the costs and complexity of the project

 (See Microsoft Word Document)

 Printed Circuit Boards were removed from our design  This drastically increased the amount of labor to construct the hardware  Surfboards  Assembly

 We completed nearly all hardware construction of the system as designed  With + or – 10% tolerance  The seven drive circuits were tested and operated correctly  We ran out of time to do the software

 We will attempt to manually generate our own pulse width modulation using lab supplies  No microprocessor  No zero crossing circuit  No knobs

 From the graph we determine that this load would work well with the generator  However, the simulation does not include the effects of switching losses  We must build the hardware to demonstrate switching losses  Still, the simulation provides useful information about the system

 The Drive Circuits functioned properly during independent testing.  However, the turn-on rate for the MOSFETs appears to be insufficient for proper operation at 10 kHz.  This may be remedied by adjusting component values in the Drive Circuits

 An external housing would greatly improve the safety of the system.  Proper design of the system makes failure unlikely, however operator misuse could result in injury or death due to electrocution.

 Lack of proper communication with our mentor resulted in a lot of wasted time  Wasted time resulted in our failure to have software operational  We will test the system over the next several days using our own created PWM  We won’t know the final results of the entire system performance until then

 Have 4 group members  2 Electrical Engineers  1 Computer Engineer  1 Computer Scientist  The computer engineer and computer scientist work on the software while the electrical engineers work on the hardware  Include the automatic feedback and include a simple user friendly GUI

 Incorporate externalized elements to create independently functional device  Meters  Display  Power supply  Power dump  Add canceled features back into the system  Computer interface  Battery back-up  Internal memory