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參數(shù)資料
| 型號： | PBL3717A |
| 廠商： | 意法半導體 |
| 英文描述： | KPTC6F10-6SC |
| 中文描述： | 步進電機驅(qū)動器 |
| 文件頁數(shù)： | 7/11頁 |
| 文件大小： | 187K |
| 代理商： | PBL3717A |
Figure 5 :
Inputand OutputSequencesfor Half Stepand Full Step Operation
APPLICATION INFORMATIONS
Figure 3 shows a typical application in which two
PBL3717Acontrola two phasebipolarsteppermo-
tor.
Programming
Thelogic inputs I
0
andI
1
setat threedifferentlevels
the amplitude of the current flowing in the motor
windingaccordingto thetruthtableofpage2.Ahigh
level on the ”PHASE” logic input sets the direction
of that currentfromoutputAto outputB; alowlevel
from outputB to outputA.
It is recommended that unused inputs are tied to
pin 6 (V
ss
) or pin 4 (GND) as appropriate to avoid
noiseproblem.
The current levels can be varied continuously by
changingthe ref. voltageon pin 11.
Control of the Motor
Thesteppermotorcanrotateineitherdirectionsac-
cording to the sequence of the input signals. It is
possibleto obtaina fullstep, ahalfstep anda quar-
ter step operation.
Full StepOperation
Both the windings of the stepper motor are ener-
gized all the time with the same current I
MA
= I
MB
.
I
0
andI
1
remainfixed at whatevertorquevalueisre-
quired.
Calling A the conditionwith winding A energizedin
one direction and A in the other direction, the se-
quencefor full step rotationis :
AB
→
AB
→
AB
→
ABetc.
For the rotation in the otherdirection the sequence
must be reserved.
In thefullstepoperationthetorqueis constanteach
step.
HalfStep Operation
Power is applied alternately to one winding then
bothaccording to the sequence:
AB
→
B
→
AB
→
A
→
AB
→
B
→
AB
→
A etc.
Like full step this can be doneat anycurrent level ;
the torque is not constantbut it is lower when only
one windingis energized.
A coil is turnedoff bysetting I
0
and I
1
bothhigh.
PBL3717A
7/11
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