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Geo MACRO Drive User Manual
190 Appendix D
Stepping through an Electrical Cycle
It is important to know what commands to use in order to force the motor into different locations of the
electrical cycle.
Two different cases will determine the command set that will be used based on the commutation phase
angle. Below is a list of both command sets in increments of 30 degrees electrical from 0-360 degrees.
The following is meant as a reference for understanding and there is no need to perform this test to setup
the Hall Effects with PMAC.
Manually Stepping through an Electrical Cycle at 30 degree increments
Commutation Phase Angle at 120
o
–> Ixx72= 683(Turbo)
Direct PWM or Sinusoidal Commutation
P179=I179 P129=I129 ; store previous offsets before test
#1o0 ; Open loop command of zero magnitude
I179=3000 I129=0 ; 0
o
elec.
I179=3000 I129=-1500 ; -30
o
elec.
I179=3000 I129=-3000 ; -60
o
elec.
I179=1500 I129=-3000 ; -90
o
elec.
I179=0 I129=-3000 ; -120
o
elec.
I179=-1500 I129=-1500 ; -150
o
elec.
I179=-3000 I129=0 ; 180
o
elec.
I179=-3000 I129=1500 ; 150
o
elec.
I179=-3000 I129=3000 ; 120
o
elec.
I179=-1500 I129=3000 ; 90
o
elec.
I179=0 I129=3000 ; 60
o
elec.
I179=1500 I129=1500 ; 30
o
elec.
I179=3000 I129=0 ; 0
o
elec.
I179=P179 I129=P129 ; restore previous offsets after test
Commutation Phase Angle at 240
o
–> Ixx72= 1365(Turbo)
Direct PWM Commutation
P179=I179 P129=I129 ; store previous offsets before test
#1o0 ; Open loop command of zero magnitude
I179=3000 I129=0 ; 0
o
elec.
I179=1500 I129=1500 ; -30
o
elec.
I179=0 I129=3000 ; -60
o
elec.
I179=-1500 I129=3000 ; -90
o
elec.
I179=-3000 I129=3000 ; -120
o
elec.
I179=-3000 I129=1500 ; -150
o
elec.
I179=-3000 I129=0 ; 180
o
elec.
I179=-1500 I129=-1500 ; 150
o
elec.
I179=0 I129=-3000 ; 120
o
elec.
I179=1500 I129=-3000 ; 90
o
elec.
I179=3000 I129=-3000 ; 60
o
elec.
I179=3000 I129=-1500 ; 30
o
elec.
I179=3000 I129=0 ; 0
o
elec.
I179=P179 I129=P129 ; restore previous offsets after test
Note:
Remember to clear the offsets when finished with the test Ixx79=0 and Ixx29=0.