Electric motor design case studies, FEMM simulation walkthroughs, and practical notes on windings, losses and efficiency — from the MotorDesignSoftware team.
Beyond a single Ld/Lq: how flux look-up tables map inductance across the whole Id–Iq plane, why saturation makes them matter for MTPA and flux weakening, with 3D flux maps of a Chevy Bolt motor.
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Motor inductance isn't constant. Apparent vs. incremental inductance explained, and why Ld and Lq change as a motor saturates — compared at 5 A and 50 A.
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Ideal sinusoidal current vs. real PWM current at 4, 16 and 100 kHz — a FEMM simulation study of how the excitation waveform changes torque ripple, copper loss, core loss and efficiency.
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Why the main and auxiliary windings differ, what really drives ceiling-fan efficiency and star ratings, and a full FEMM simulation of flux, currents, torque, losses and power factor for a 14-pole, 52 W fan motor.
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