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參數資料
| 型號： | IR22771S |
| 廠商： | International Rectifier |
| 英文描述： | Phase Current Sensor IC for AC motor control |
| 中文描述： | 相電流傳感器IC交流電機控制 |
| 文件頁數： | 11/16頁 |
| 文件大?。?/td> | 441K |
| 代理商： | IR22771S |
IR22771S/IR21771S
(PbF)
1.5
Filter AC characteristic
IR21771/22771 signal path can be considered as
composed by three stages in series (see Figure 13).
The first two stages perform the filtering action.
Stage 1 (input filter) implements the filtering action
originating the transfer function shown in Figure 14.
The input filter is a self-adaptive reset integrator
which performs an accurate ripple cancellation. This
stage extracts automatically the PWM frequency
from Sync signal and puts transmission zeros at
even harmonics, rejecting the unwanted PWM
noise.
The following timing diagram shows the principle by
which even harmonics are rejected (Figure 12).
11
www.irf.com
1.4
DC transfer functions
The working principle of the device can be easily
explained by Figure 10, in which the main signals
are represented.
Triangular
reference
SYNC
Vin
PO
Figure 10:
Main current sensor signals and
outputs
PWM out (PO pin) gives a duty cycle which is
inversely proportional to the input signal.
Eq. 2 gives the resulting
D
n
of the PWM output (PO
pin):
%
40
%
20
Eq. 2
in
n
V
V
D
=
where
V
in
= V
inp
-V
inm
30%
25%
20%
15%
10%
V
in
PO duty cycle
Figure 11:
PO Duty Cycle (
D
n
)
Figure 12:
Even harmonic cancellation principle
As can be seen from Figure 14, the odd harmonics
are rejected as a first order low pass filter with a
single pole placed in f
PWM
.
The input filter group delay in the pass-band is very
low (see GD on AC electrical characteristics) due to
the beneficial action of the zeroes.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| IR22771SPBF | 功能描述:馬達/運動/點火控制器和驅動器 1200V PHASE CURRENT SENSING IC 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 |
| IR22771STRPBF | 功能描述:馬達/運動/點火控制器和驅動器 1200VPhs Cur Sens IC for AC Mtr Cntrl 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 |
| IR2277S | 制造商:IRF 制造商全稱:International Rectifier 功能描述:Phase Current Sensor IC for AC motor control |
| IR2277SPBF | 功能描述:馬達/運動/點火控制器和驅動器 1200V PHASE CURRENT SENSING IC 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 |
| IR2277STRPBF | 功能描述:馬達/運動/點火控制器和驅動器 1200VPhs Cur Sens IC for AC Mtr Cntrl 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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