6、Field Oriented control (FOC)

Source: ABB

Textbook: Bin Wu, ‘High-Power Converters and AC Drives’, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4

ω

ω

kept at the rated value ω

θ

sl

i ,,f

θr λe ωbs as v ,Rotor flux and torque are controlled independently high dynamic performance

bs as i ,*

ds i f

θds i qs

f

θ*,bs v v *cs

v Direct FOC -Rotor flux angle θmeasured motor terminal voltages and currents

)dt

i R r

i

qs

Space vector diagram for rotor flux calculation and q-axis currents and flux are ac variables

qs

λs

L σL σ*

ds

i f

θi θbs

bs as i i ,Textbook: Bin Wu, ‘High-Power Converters and AC Drives’, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4

as

AN

3

Textbook: Bin Wu, ‘High-Power Converters and AC Drives’, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4

r (Wb),)

(A as m)

(N ?e

Textbook: Bin Wu, ‘High-Power Converters and AC Drives’, Wiley-IEEE Press, 2006, ISBN: 0-471-73171-4