参数资料
型号: 71M6511-DB
厂商: Maxim Integrated Products
文件页数: 47/115页
文件大小: 0K
描述: BOARD DEMO 71M6511 ENERGY METER
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 1
主要目的: 电源管理,电度表/功率表
嵌入式:
已用 IC / 零件: 71M6511
已供物品: 2 个板,线缆,CD,电源
71M6511/71M6511H Demo Board User’s Manual
And we calculate the new calibration current gain coefficient, including compensation for a slight gain
increase in the phase calibration circuit.
CAL _ I NEW =
CAL _ I
A XI
1 +
1
2 ? 20 PHADJ ( 2 + 2 ? 20 PHADJ ? 2(1 ? 2 ? 9 ) cos( 2 π f 0 T ))
1 ? 2 ( 1 ? 2 ? 9 ) cos( 2 π f 0 T ) + ( 1 ? 2 ? 9 ) 2
2.1.2 CALIBRATION WITH FIVE MEASUREMENTS
The five measurement method provides more orthogonality between the gain and phase error derivations.
This method involves measuring E V , E 0 , E 180 , E 60 , and E 300 . Again, set all calibration factors to nominal, i.e.
CAL_IA = 16384, CAL_VA = 16384, PHADJA = 0.
First, calculate A XV from E V :
1.
A XV = E V + 1
Calculate A XI from E 0 and E 180 :
2.
E 0 =
IV A XV A XI cos( 0 ? φ S )
IV cos( 0 )
? 1 = A XV A XI cos( φ S ) ? 1
3.
E 180 =
IV A XV A XI cos(180 ? φ S )
IV cos( 180 )
? 1 = A XV A XI cos( φ S ) ? 1
4.
E 0 + E 180 = 2 A XV A XI cos( φ S ) ? 2
5.
A XV A XI =
E 0 + E 180 + 2
2 cos( φ S )
6.
A XI =
( E 0 + E 180 ) 2 + 1
A XV cos( φ S )
Use above results along with E 60 and E 300 to calculate φ S .
7.
E 60 =
IV A XV A XI cos( 60 ? φ S )
IV cos( 60 )
? 1
= A XV A XI cos( φ S ) + A XV A XI tan( 60 ) sin( φ S ) ? 1
8.
E 300 =
IV A XV A XI cos( ? 60 ? φ S )
IV cos( ? 60 )
? 1
= A XV A XI cos( φ S ) ? A XV A XI tan( 60 ) sin( φ S ) ? 1
Subtract 8 from 7
9.
E 60 ? E 300 = 2 A XV A XI tan( 60 ) sin( φ S )
use equation 5:
Revision 5.4
? 2005-2007 TERIDIAN Semiconductor Corporation
Page: 47 of 115
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