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參數資料
| 型號： | L6258E |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 運動控制電子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, 1.5 A, PDSO36 |
| 封裝： | ROHS COMPLIANT, SOP-36 |
| 文件頁數： | 16/31頁 |
| 文件大?。?/td> | 360K |
| 代理商： | L6258E |
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L6258E
PWM current control loop
Doc ID 8688 Rev 9
23/31
Figure 10.
Electrical model of the load
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
ωis the motor speed in radiant per second
The formula defining the gain of the load considering the Bemf of the stepper motor
becomes:
we can see that the Bemf influences only the gain of the load block and does not introduce
any other additional pole or zero, so from the stability point of view the effect of the Bemf of
the motor is not critical because the phase margin remains the same.
Practically the only effect of the Bemf is to limit the gain of the total Aloop with a consequent
variation of the bandwidth of the system.
OUT+
Bemf
R
L
OUT-
R
S
to Sense
Amplifier
ACload
Vsense
Vout
---------------------
V
S
Bemf
–
()
R
S
R
L
R
S
+
----------------------
V
S
----------------------------------------------------------------
==
Acload
V
S
Bemf
–
V
S
-----------------------------
R
S
R
L
R
S
+
----------------------
=
ACload
dB
20
V
S
Bemf
–
V
S
-----------------------------
R
S
R
L
R
S
+
----------------------
log
=
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相關代理商/技術參數 |
參數描述 |
|---|---|
| L6258E_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:PWM controlled high current DMOS universal motor driver |
| L6258EA | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:PWM controlled high current DMOS universal motor driver |
| L6258EP | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:PWM controlled high current DMOS universal motor driver |
| L6258EP_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:PWM controlled high current DMOS universal motor driver |
| L6258EX | 功能描述:馬達/運動/點火控制器和驅動器 1.5A Stepper Motor RoHS:否 制造商:STMicroelectronics 產品: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 |
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