3. Speed control

For both supply modes, it is assumed that the flux loop can be represented by an equivalent first order with time constant T _Φ : $\frac{Δ Φ_{r}}{Δ {(Φ_{r})}_{ref}} = \frac{1}{1 + p T_{ϕ}}$

with

$T_{Φ} \approx \frac{t_{Φ}}{3}$

In a frame of reference...

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Speed control

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page Magnetic flux control

Direct scalar drive without speed sensor

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References

(1) - DE FORNEL (B.) - Machines à courant alternatif alimentées à fréquence variable par convertisseurs statiques - . Thèse de doctorat d'État, INP Toulouse (1976).
(2) - BOSE (B.K.) - Power Electronics and AC Drives - . Prentice Hall (1986).

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