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參數(shù)資料
| 型號： | L6258EX |
| 廠商： | 意法半導體 |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | PWM CONTROLLED - HIGH CURRENT DMOS UNIVERSAL MOTOR DRIVER |
| 中文描述： | PWM控制-大電流DMOS的通用型電機驅(qū)動 |
| 文件頁數(shù)： | 16/24頁 |
| 文件大?。?/td> | 216K |
| 代理商： | L6258EX |
L6258E
16/24
Figure 10.
We can see that the effect of the load pole is cancelled by the zero of the Bx block ; the total Aloop cross a the
0dB axis with a slope of -20dB/decade, having in this way a stable system with an high gain at low frequency
and a bandwidth of around 8KHz.
To increase the bandwidth of the system, we should increase the gain of the Bx block, keeping the zero in the
same position. In this way the result is a shift of the total Aloop transfer function up to a greater value.
4.5 Effect of the Bemf of the stepper motor on the current control loop stability
In order to evaluate what is the effect of the Bemf voltage of the stepper motor we have to look at the load block :
Figure 11.
The schematic now shows the equivalent circuit of the stepper motor including a sine wave voltage generator
of the Bemf. The Bemf voltage of the motor is not constant, its value changes depending on the speed of the
motor.
Increasing the motor speed the Bemf voltage increases :
Bemf = Kt ·
ω
where:
Kt is the motor constant
ω
is the motor speed in radiant per second
OUT+
Bemf
R
L
L
L
OUT-
R
S
to Sense
Amplifier
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6258EX_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:PWM controlled high current DMOS universal motor driver |
| L6258EXTR | 功能描述:馬達/運動/點火控制器和驅(qū)動器 Hi-Curr Univ Motor 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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| L625CME | 制造商:COOPER INDUSTRIES 功能描述:LUFKIN / TAPE,POWER,1"(25MM)X25(8 |
| L625DG | 制造商:LIGHTING COMP DESIGN 功能描述: 制造商:Lighting Components & Design Inc 功能描述: |
| L625DR | 制造商:LIGHTING COMP DESIGN 功能描述: 制造商:Lighting Components & Design Inc 功能描述: |
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