Datasheet

8. Sensorless F.O.C. algorithm
Please, find below the sensor-less FOC algorithm block diagram.
Sensorless F.O.C algorithm
z
-1
z
-1
z
-1
z
-1
0 [Id
ref
]
Id PI
Iq PI
Speed PI

ref
Speed
estimation
Flux Phase
estimation
PWM
Modulation
(u, v, w) →
(, )
(, ) →
(d, q)
(d, q) →
(, )
(, ) →
(u, v, w)
Motor
Current
Reading (z
-1
)
z
-1
+
-
+
-
+
-
Vd
Vq
I
mea
I
mea
Iu
mea
Iv
mea
Id
mea
Iq
mea

est

est
Iq
ref
V
V