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參數資料
| 型號： | IM2000S |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | HIGH PERFORMANCE MICROSTEPPING STEP MOTOR CONTROLLER |
| 中文描述： | 高性能的微步進電機控制器 |
| 文件頁數： | 12/16頁 |
| 文件大小： | 142K |
| 代理商： | IM2000S |
12
C ur r e nt C ont r ol
D ig it a l C ur r e nt C ont r ol
The schematic example shown in Figure 3.7 illustrates
how the user might set up the 0 to 2V D/A reference to
control the output current of the driver.
A ut om a t ic C ur r e nt R e duc t ion
The IM2000S contains an auto-current reduction circuit
which will automatically set the CURRED output
HIGH approximately 1.5 seconds after the rising edge
of the last step clock pulse. This output, coupled with a
minimum of external components may be used to
reduce the current in the windings when the motor is at
a standstill.
The CURRED output will then be reset on the next rising edge of the step clock
input. This feature can greatly reduce motor and driver heating. It may also
increase power efficiency in systems not requiring full holding torque.
Note that although both phases are reduced by the same percentage when using
the Automatic Current reduction feature, motor shaft movement may occur,
depending on shaft positioning and load type.
E xa m ple A pplic a t ion of t he P ow e r C ont r ol Out put s
Figure 3.6: Power Control Output Interface Examples
SIGNA
ENAN
PW MA
DIR
BRAKE
PW M
TFLAG
GND
DIR
BRAKE
PW M
TFLAG
GND
SIGNB
ENBN
PW MB
+5V
OVTMP
10k
VS
OUT1
BOOT1
BOOT2
OUT2
VSEN
VS
OUT1
BOOT1
BOOT2
OUT2
VSEN
6
2
1
11
10
8
6
2
1
11
10
8
3
4
5
9
7
3
4
5
9
7
IM2000 Interface for the
National Semiconductor LMD18200 &
International Rectifier IR8200B
PHASE A
PHASE B
IM2000
ENA
HLA
HRA
ENA
IN1
IN2
ENB
IN3
IN4
VSS
GND
ENB
HLB
HRB
VS
OUT1
OUT2
OUT3
OUT4
VSENB
VSENA
IM2000 Interface for the
SGS Thomson L298
PHASE A
PHASE B
IM2000
6
5
7
11
10
12
4
2
3
13
14
15
1
9
8
TO CURRENT
ADJ UST CIRCUIT
CURRENT ADJ UST
RESISTOR
CURRENT REDUCTION
RESISTOR
INPUT FROM
CURRED
VN0300 OR
EQUIVALENT
Figure 3.8: Automatic Current Reduction
Figure 3.7: Digital Current Control Example
INPUT FROM COUT
INPUT FROM DIR
X9C102
>INC
U/ D
CS
VH
VW
VL
0 TO 2V REFERENCE
FOR D/ A CONVERTERS
LM234Z
+V
+5V
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