Permanent Magnet Synchronous Machine Models Comparison

Refer to the PMSM BLDC Section and PMSM SH Section pages for information related to configuring these models in the Add-On.

	Variable D-Q (VDQ)		Spatial Harmonics (SH)
	Constant Ld/Lq	Variable Ld/Lq	V1	V2
Description	2 phase equivalent circuit model with a d-q rotating reference frame and variable inductance table according to the operating point.		3 phase detailed model with 3D table for flux, torque and inductance.
Advantages	Fast execution: ~ 100 ns Low FPGA resource usage Variable Ld – Lq Good for most operating condition		Simulation of spatial/current harmonics FEA based models Mechanical model on FPGA
Disadvantages	No simulation of current harmonics.		Slower execution: ~ 500 ns High FPGA resource usage
Minimum time step	100 ns		500 ns
Electrical machine parameters	Constant Ld, Lq and magnet flux.	2D tables for Ld, Lq and magnet flux Id and Iq are dependent.	3D tables for phase inductance, magnet flux and torque tables Id Iq and θ are dependent.
Mechanical model	Basic inertia and friction mechanical model attached to the rotor. Users can define their own model on CPU or through customizing the FPGA
Compatibility with JMAG	No		JMAG v10.5+
Compatibility with ANSYS	No		ANSYS Maxwell 2016.1+
Inductance / torque / flux table size	NA	128x128 for 2 machines	32x16x16 samples for 2 machines 32x32x16 samples for 1 machine	32x32x32 for 2 machines 64x32x32 for 1 machine
Compatible Hardware Configurations	eHSx32_6_Ph_PMSM_VDQ_IO_32DO_7868R eHSx32_Dual_PMSM_VDQ_IO_32DO_7868R eHSx64_Dual_PMSM_VDQ_IO_7868R eHSx64_Quad_PMSM_VDQ_IO_7891 (Archived) Dual_eHSx64_Quad_PMSM_VDQ_IO_Dual_7868R (Archived) eHSx128_Dual_PMSM_VDQ_IO_7976R		eHSx32_Dual_PMSM_SH_IO_7868R	eHSx64_Quad_PMSM_SH_IO_7891 (Archived) eHSx128_Dual_PMSM_SH_IO_7976R