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參數(shù)資料
| 型號(hào)： | LM629 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Precision Motion Controller |
| 中文描述： | 精密運(yùn)動(dòng)控制器 |
| 文件頁數(shù)： | 9/24頁 |
| 文件大?。?/td> | 630K |
| 代理商： | LM629 |
Theory of Operation
(Continued)
TABLE 1. System Specifications Summary
(Continued)
Feedback Device
Control Algorithm
Sample Intervals
Incremental Encoder (quadrature signals; support for index pulse)
Proportional Integral Derivative (PID) (plus programmable integration limit)
Derivative Term: Programmable from 2048/f
CLK
to (2048
*
256)/f
CLK
in steps of 2048/f
CLK
(256
to 65,536 μs for an 8.0 MHz clock).
Proportional and Integral: 2048/f
CLK
VELOCITY PROFILE (TRAJECTORY) GENERATION
The trapezoidal velocity profile generator computes the de-
sired position of the motor versus time. In the position mode
of operation, the host processor specifies acceleration, maxi-
mum velocity, and final position. The LM628 uses this infor-
mation to affect the move by accelerating as specified until
the maximum velocity is reached or until deceleration must
begin to stop at the specified final position. The deceleration
rate is equal to the acceleration rate. At any time during the
move the maximum velocity and/or the target position may
be changed, and the motor will accelerate or decelerate ac-
cordingly. Figure 10 illustrates two typical trapezoidal veloc-
ity profiles. Figure 10(a) shows a simple trapezoid, while Fig-
ure 10(b) is an example of what the trajectory looks like
when velocity and position are changed at different times
during the move.
When operating in the velocity mode, the motor accelerates
to the specified velocity at the specified acceleration rate and
maintains the specified velocity until commanded to stop.
The velocity is maintained by advancing the desired position
at a constant rate. If there are disturbances to the motion
during velocity mode operation, the long-time average veloc-
ity remains constant. If the motor is unable to maintain the
specified velocity (which could be caused by a locked rotor,
for example), the desired position will continue to be in-
creased, resulting in a very large position error. If this condi-
DS009219-11
FIGURE 9. Quadrature Encoder Signals
DS009219-12
FIGURE 10. Typical Velocity Profiles
L
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM629M-6 | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| LM629M-6 | 制造商:Texas Instruments 功能描述:MOTION CONTROL SMD SOIC24 629 |
| LM629M-6/NOPB | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 PRECISION MOTION CONTROLLER RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| LM629M-8 | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| LM629M-8 | 制造商:Texas Instruments 功能描述:MOTION CONTROL SMD SOIC24 629 |
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