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參數(shù)資料
| 型號： | DRM043 |
| 英文描述： | Li-on Battery Charger Reference Design Designer Reference Manual |
| 中文描述： | 李鵬總理對電池充電器參考設(shè)計(jì)，設(shè)計(jì)參考手冊 |
| 文件頁數(shù)： | 21/80頁 |
| 文件大小： | 1025K |
| 代理商： | DRM043 |
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Hardware
Measurement transformers and shunt
DRM040 — Rev 0
Designer Reference Manual
MOTOROLA
Hardware
21
2.2 Measurement transformers and shunt
The rated current(
has a step down ratio of 2500 and a maximum primary current handling
capacity of 100A. As seen from the circuit diagram the rms voltage is
developed across two shunt resistors of 626 ohms in parallel to reduce
self-heating. Together with the shunting 1/4 attenuator, the total shunt
resistance is equal to:
) equals 15 amperes. The current transformer used
Multiplying the secondary current at with the total shunt resistance the
rms voltage across the total shunt resistance is obtained:
giving a peak value of
The peak-to-peak AC voltage signal is 4928 mV. This voltage has been
designed to be slightly less than V
refh
as not to saturate the A/D
converter. Similarly the voltage input has been designed, such that the
voltage transformer delivers less than 5 volts peak-to-peak at the highest
line voltage. The voltage transformer is a 270 volt input to 1750 mV
output device. The voltage transformer has been designed to operate at
a maximum magnetic induction of 0,5 Tesla to improve linearity. The
peak voltage at the A/D is:
×
=
Giving a peak to peak value of 4850mV
n
R
shunt
=
313
×
4010
313
+
4010
=
1255130
4323
=
290,33
V
shunt
=
I
n
2500
×
R
shunt
=
15
2500
×
290,33
=
1742
mV
max
=
1742
×
2
=
2464
mV
mV
V
2475
2
1750
max
=
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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| DRM10 | 功能描述:DIP 開關(guān)/ SIP 開關(guān) BCD 10 POS RoHS:否 制造商:Omron Electronics 位置數(shù)量:10 開關(guān)類型:DIP 執(zhí)行器:Rotary 端子節(jié)距:2.54 mm 觸點(diǎn)形式: 端接類型:Solder Pin 電流額定值:100 mA 電壓額定值 DC: 工作溫度范圍: 安裝:Through Hole |
| DRM1004 | 功能描述:DIP 開關(guān)/ SIP 開關(guān) ROTARY DIP SWITCH PLASTICSHAFT RoHS:否 制造商:Omron Electronics 位置數(shù)量:10 開關(guān)類型:DIP 執(zhí)行器:Rotary 端子節(jié)距:2.54 mm 觸點(diǎn)形式: 端接類型:Solder Pin 電流額定值:100 mA 電壓額定值 DC: 工作溫度范圍: 安裝:Through Hole |
| DRM101 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Blood Pressure Monitor Using the Flexis QE128 Family |
| DRM10C | 功能描述:SWITCH DIP MINI SHAFT 10POS T/H RoHS:否 類別:開關(guān) >> DIP 系列:DR 特色產(chǎn)品:RDM Series Rotary DIP Switch 標(biāo)準(zhǔn)包裝:70 系列:RDM 電路:十六進(jìn)制 位置數(shù):16 觸點(diǎn)額定電壓:0.1A @ 42VDC 觸動器類型:用于工具旋轉(zhuǎn) 觸動器電平:凹槽式 安裝類型:通孔 方向:頂部觸動 可清洗:是 其它名稱:EG4977-5RDMAR16PIT |
| DRM10C04 | 功能描述:編碼式波段開關(guān) SW DIP MINI SHAFT 10POS T/H RoHS:否 制造商:C&K Components 位置數(shù)量:10 輸出代碼:Binary Coded Decimal 執(zhí)行器:Screwdriver 觸點(diǎn)額定值: 端接類型:Solder Pin 封裝:Tube |
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