This thesis presents the design and implementation of field-oriented control of a five-
phase interior permanent magnet synchronous motor (IPMSM).
Five-phase motors achieve higher torque density, smoother torque ripple, and greater
fault tolerance compared to their three-phase equivalents. To describe these motors, an
extended Clarke and Park transformation into the 𝑑𝑞1 3 space is introduced, decomposing
motor quantities into two parallel planes — 𝑑𝑞1 capturing the fundamental harmonic
component and 𝑑𝑞3 capturing its third harmonic. A motor model suitable for controller
design is derived using this transformation.
The motor is driven by space vector pulse width modulation (SVPWM) with a symmetric
vector arrangement. A cascade control structure is designed, consisting of an inner
current loop and an outer speed loop. Back-EMF compensation is verified in the current
loop, reducing overshoots during step changes of the reference value.
Reference currents are generated by the Maximum Torque Per Ampere (MTPA) al-
gorithm, maximising the torque produced per ampere drawn from the supply. Third
harmonic injection is also implemented, increasing the theoretical maximum torque by
approximately 20 % compared to control utilising only the fundamental harmonic sub-
space. Current references are precomputed into a lookup table to reduce the online
computational burden.
The designed algorithms are implemented and verified in Matlab/Simulink, both on a
custom analytical model and on a Simscape model. The control blocks are subsequently
adapted for HDL code generation using the Matlab HDL Coder and HDL Verifier tool-
boxes. The generated IP cores are deployed and functionally verified on the ZedBoard
development kit (SoC Xilinx Zynq-7000). The implemented solution utilises approxi-
mately 90 % of the available FPGA logic resources.