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參數(shù)資料
| 型號(hào)： | SA9105FPA |
| 廠商： | SAMES |
| 元件分類： | 電能質(zhì)量分析儀 |
| 英文描述： | THREE PHASE BIDIRECTIONAL POWER/ENERGY METERING IC WITH INSTANTANEOUS PULSE OUTPUT |
| 中文描述： | 三相雙向功率/電能計(jì)量IC瞬時(shí)脈沖輸出 |
| 文件頁(yè)數(shù)： | 7/12頁(yè) |
| 文件大小： | 114K |
| 代理商： | SA9105FPA |
SA9105F
sames
7/12
5.
Pulse Output Signals
The calculated power is divided down to a pulse rate of 64Hz, for rated conditions
on both FOUT1 and FOUT2.
The format of the pulse output signal, which provides power/energy and direction
information, is the only difference between the signals on FOUT1 and FOUT2.
The direction of the energy flow is defined by the mark/space ratio on FOUT1, while
the pulse width defines the direction on FOUT2.
An integrated anticreep function ensures no metering at zero line currents.
DR-00950
Wave form on DIR
m
m
Positive Energy Flow
Wave form on FOUT1
Wave form on FOUT2
pp = 1.1ms
pp
t
t
m
m
pp
t
m
m
t
m
m
pn = 3.4ms
Negative Energy Flow
pn
t
t
pn
The formula for calculating the Output Frequency (f) is given below:
f = 11.16
* FOUTX *
3.58MHz 3 * I
R
Where FOUTX
= Nominal rated frequency (64Hz)
FOSC
= Oscillator frequency (2MHz ...... 4MHz)
I
I1
, I
I2
, I
I3
= Input currents for current sensor inputs (16μA at rated line current)
I
V1
, I
V2
, I
V3
= Input currents for voltage sensor inputs (14μA at rated line voltage)
I
R
= Reference current (typically 50μA)
FOSC
*
(I
I1
I
V1
) + (I
I2
I
V2
) + (I
I3
I
V3
)
2
TYPICAL APPLICATION
In the Application Circuit (Figure 1), the components required for a three phase power
metering application are shown. Terminated current transformers are used for current
sensing.
The most important external components for the SA9105F integrated circuit are:
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