Geo MACRO Drive User and Reference Manual
Setting Up Turbo Motor Operation
91
Hall Sensors at 30
o
,
150
o
, and 270
o
P179=I179 P129=I129
; store previous offsets before test
#1o0
; Open loop command of zero magnitude
Six Step Method
U (M126) V(M125)
W(M124)
I179=1500 I129=1500 ; -30
o
elec.
I179=3000 I129=-1500 ; 30
o
elec.
I179=1500 I129=-3000 ; 90
o
elec.
I179=-1500 I129=-1500 ; 150
o
elec.
I179=-3000 I129=1500 ; -150
o
elec.
I179=-1500 I129=3000 ; -90
o
elec.
I179=1500 I129=1500 ; -30
o
elec.
I179=P179 I129=P129
; restore previous offsets after test
Hall Sensors at 0
o
,
120
o
, and 240
o
P179=I179 P129=I129
; store previous offsets before test
#1o0
; Open loop command of zero magnitude
Six Step Method
U (Mx26) V(Mx25)
W(Mx24)
I179=3000 I129=0
; 0
o
elec.
I179=3000 I129= -3000 ; 60
o
elec.
I179=0 I129= -3000 ; 120
o
elec.
I179=-3000 I129=0
; 180
o
elec.
I179=-3000 I129=3000 ; -120
o
elec.
I179=0 I129=3000 ; -60
o
elec.
I179=3000 I129=0
; 0
o
elec.
I179=P179 I129=P129
; restore previous offsets after test
Now that the transitions have been mapped out for the sections of the electrical cycle, define and calculate
the Hall Effect Zero (HEZ).
Note:
Remember to clear the offsets when finished with this test.
Hall Effect Zero (HEZ) –
The Hall Effect Zero is the location in the electrical cycle when U is low
(value of 0), W is high (value of 1), and V changes state either from 1 to 0 or from 0 to 1.
Example:
U
V
W
-30
30
90
150
-150
-90
1
0
1
0
1
0
Cycle:
UVW Value:
1
3
2
6
4
5
HEZ @ +60 degrees electrical
The offset can be computed using the mapping test shown above. In the example, the Hall Effect Zero
(HEZ) point was found to be b30
o
e and +90
o
e, so it is 60
o
e. The offset value can be
computed as:
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