參數(shù)資料
型號: LMD18245MWC
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 運動控制電子
英文描述: STEPPER MOTOR CONTROLLER, 6 A, UUC
封裝: WAFER
文件頁數(shù): 7/20頁
文件大?。?/td> 664K
代理商: LMD18245MWC
The Typical Application (Continued)
QUARTER STEP DRIVE WITH TORQUE
COMPENSATION
Figure 13 shows the winding currents and lookup table for a
quarter step drive (four microsteps per full step) with torque
compensation.
DS011878-26
Top Trace: Phase A Winding Current at 1A/div
Bottom Trace: Phase B Winding Current at 1A/div
Horizontal: 2ms/div
*250 steps/second
90 ELECTRICAL/FULL STEP ÷ 4 MICROSTEPS/FULL STEP = 22.5 ELECTRICAL/MICROSTEP
α
|cos(
α)|
D A
DIRECTION A
|sin(
α)|
D B
DIRECTION B
01
15
1
0
1
22.5
0.924
14
1
0.383
6
1
|
45
0.707
11
1
0.707
11
1
FORWARD
67.5
0.383
6
1
0.924
14
1
90
0
1
15
1
112.5
0.383
6
0
0.924
14
1
135
0.707
11
0
0.707
11
1
REVERSE
157.5
0.924
14
0
0.383
6
1
|
180
1
15
0
202.5
0.924
14
0
0.383
6
0
225
0.707
11
0
0.707
11
0
247.5
0.383
6
0
0.924
14
0
270
0
1
15
0
292.5
0.383
6
1
0.924
14
0
315
0.707
11
1
0.707
11
0
337.5
0.924
14
1
0.383
6
0
REPEAT
BRAKE A = BRAKE B = 0
FIGURE 13. Winding Currents and Lookup Table for Quarter Step Drive with Torque Compensation
15
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