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FPGA-Based High-Bandwidth Motor Emulator for Interior Permanent Magnet Machine Utilizing SiC Power Converter

Journal Article · · IEEE Journal of Emerging and Selected Topics in Power Electronics
 [1];  [2];  [2];  [2]
  1. North Carolina State University, Raleigh, NC (United States); PowerAmerica/NC State
  2. North Carolina State University, Raleigh, NC (United States)
+ Show Author Affiliations
A high bandwidth (> 20 kHz) motor emulator prototype for AC machines, utilizing FPGA based hybrid model predictive controller (MPC) and a high fidelity motor model and implemented with a voltage source power converter, and fastswitching SiC devices, is presented in this paper. The hybrid MPC incorporates a unique gate stitching modulation strategy that synchronizes the inverter switching state with the ME switching state for accurate representation of the emulated motor currents in the physical inverter hardware output. The gate stitching MPC hybrid algorithm avoids the need for excessively high switching frequency of the ME power converter. The developed high bandwidth ME can emulate up to the switching ripple current of the Inverter Under Test (IUT) where the current slope can change up to 6 times within one switching period when using space vector PWM. The FPGA based fast iterating online motor model is another key component which along with the high performance ME current regulation algorithm can accurately emulate the motor current. The bandwidth achieved far exceeds that of existing Motor Emulator (ME) solutions that can only emulate fundamental current and only few orders of harmonic content. Furthermore, the high bandwidth also allows the use of a small line inductor which reduces the size and cost of the ME system. Simulation and experiment results are provided to the FPGA implementation and validate the high bandwidth current emulating capability.
Research Organization:
North Carolina State University, Raleigh, NC (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
EE0006521
OSTI ID:
2440868
Alternate ID(s):
OSTI ID: 1848432
Journal Information:
IEEE Journal of Emerging and Selected Topics in Power Electronics, Journal Name: IEEE Journal of Emerging and Selected Topics in Power Electronics Journal Issue: 4 Vol. 9; ISSN 2168-6777
Publisher:
IEEECopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

42 ENGINEERING
Interior permanent magnet (IPM)
Inverter testing
Power-HIL
Power-hardware-in-the-loop (PHIL)
Traction drive