Transcript ppt - Purdue University

Electric Drive System for midsize passenger vehicles
System Level Diagram of the Motor Drive
-100kW(approx 130 hp)
-FPGA based all digital control
Upper Left: A 100Amp RMS three phase current at 400Hz
Upper Right: Specifically designed inductor for the motor
drive
Bottom Central: Test circuit for ADC
Project Goals:
An ability to………
… control current through an
inductive load
…sample and digitally filter analog
waveforms
…track rotor position and speed
using an optical encoder
…display sensor feedback on userinterface (UI)
…detect system temperature for
thermal fail-safes
Achievements:
Senior Power Project of the Year
at Purdue ECE awarded from IEEE
Central Indiana PES/IAS
-Goal is to be more compact than
standard industry drives due to
reduced complexity of circuit
-Screen with user interface for
real-time status display(RPM,
temperature, battery life, etc.)
The FPGA drive system will be a
hysteresis controlled current source
allowing direct control of torque. A
wound rotor synchronous three
phase motor with brushless field
excitation will be used. These motors
have the high energy density needed
for a good automotive application,
but the control is complex. All of the
control logic for switching the power
transistors from current sensor and
rotor angular feedback data will be
digital and contained in the FPGA.
electricivic is a Purdue University senior
design team creating an all digital FPGA
based 100kW three phase motor drive
system for electric vehicles. The
motivation behind the project is to
explore the use of all-digital FPGA logic
in high-speed power switching
applications instead of the complex
circuitry associated with analog current
control methods.
Our motor drive is
designed to power
standard 230 volt AC
motors. A 325 volt bank of
batteries would be
optimum to power our
drive, but lower voltages
would work with reduced
performance.
Programming our Xilinx Sparten 3E FPGA
with some test code
Contact Information: Benjamin Dannan, Mark Snyder, Mike Mitchell, Matt Klutzke
[email protected]
[email protected]
[email protected] [email protected]
Motor Drive Circuit Board with Motor