Online Parameter Estimation Technique for Adaptive Control Applications of Interior PM Synchronous Motor Drives

MTPA Control of IPMSM Drives Based on Virtual Signal Injection Considering Machine Parameter Variations

“…In steady state, by substitution of (1), (2) and (4) into (9) and (10), the derivatives of and with respect to the current angle can be deduced in (18) and (19), respectively. It is worth noting that since in (11) and (12) is injected mathematically and no real signal is injected into motor, the measured d-and q-axis currents and the reference d-and q-axis voltages will not vary with , nor do the machine parameters in (18) and (19).…”

“…It is worth noting that since in (11) and (12) is injected mathematically and no real signal is injected into motor, the measured d-and q-axis currents and the reference d-and q-axis voltages will not vary with , nor do the machine parameters in (18) and (19).…”

On Accuracy of Virtual Signal Injection based MTPA Operation of Interior Permanent Magnet Synchronous Machine Drives

“…Substituting (6) and (7) into (3) leads to: (8) The significance of the expression in (8) is that only is required for torque evaluation. If a small high frequency sinusoidal signal is injected into the stator current angle, , according to (4) and (5), the corresponding d-and q-axis currents, and , can be expressed in (10) and (11), respectively.…”

PM-Assisted Synchronous Reluctance Machine Flux Weakening Control for EV and HEV Applications

“…In contrast, other strategies follow a stator flux reference frame control approach [29], or perform the optimum set point calculations in real time from inductances and PM-flux data [19], or by using estimated parameters [30], [31].…”