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| 型号： | 71M6513H-DB |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 43/112页 |
| 文件大小： | 0K |
| 描述： | BOARD DEMO 71M6513H 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： | 否 |
| 已用 IC / 零件： | 71M6513H |
| 已供物品： | 2 个板，线缆，CD，电源 |
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71M6513/71M6513H Demo Board User’s Manual
2
2
APPLICATION INFORMATION
2.1 CALIBRATION THEORY
A typical meter has phase and gain errors as shown by φ S , A XI , and A XV in Figure 2-1. Following the typical
meter convention of current phase being in the lag direction, the small amount of phase lead in a typical current
sensor is represented as - φ S . The errors shown in Figure 2-1 represent the sum of all gain and phase errors.
They include errors in voltage attenuators, current sensors, and in ADC gains. In other words, no errors are
made in the ‘input’ or ‘meter’ boxes.
INPUT
ERRORS
METER
I φ L
φ L is phase lag
?φ S
φ S is phase lead
A XI
I RMS
IDEAL = I ,
ACTUAL = I A XI
Π
W
IDEAL = IV cos( φ L )
ACTUAL = IV A XI A XV cos( φ L ? φ S )
V
A XV
V RMS
IDEAL = V ,
ACTUAL = V A XV
ERROR ≡
ACTUAL ? IDEAL = ACTUAL ?
IDEAL IDEAL
1
Figure 2-1: Watt Meter with Gain and Phase Errors.
During the calibration phase, we measure errors and then introduce correction factors to nullify their effect. With
three unknowns to determine, we must make at least three measurements. If we make more measurements, we
can average the results.
2.1.1 CALIBRATION WITH THREE MEASUREMENTS
The simplest calibration method is to make three measurements. Typically, a voltage measurement and two
Watt-hour (Wh) measurements are made. A voltage display can be obtained for test purposes via the command
>MR2.1 in the serial interface.
Let’s say the voltage measurement has the error E V and the two Wh measurements have errors E 0 and E 60 ,
where E 0 is measured with φ L = 0 and E 60 is measured with φ L = 60. These values should be simple ratios—not
percentage values. They should be zero when the meter is accurate and negative when the meter runs slow.
The fundamental frequency is f 0 . T is equal to 1/f S , where f S is the sample frequency (2560.62Hz). Set all
calibration factors to nominal: CAL_IA = 16384, CAL_VA = 16384, PHADJA = 0.
Page: 43 of 112
? 2005-2006 TERIDIAN Semiconductor Corporation
Revision 5.6
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 71M6513H-IEL | 制造商:未知厂家 制造商全称:未知厂家 功能描述:71M6513 |
| 71M6513H-IEL/F | 功能描述:计量片上系统 - SoC 3-Phase Energy Meter I/C RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel |
| 71M6513H-IELR | 功能描述:计量片上系统 - SoC 3-Phase Energy Meter I/C RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel |
| 71M6513H-IELR/F | 功能描述:计量片上系统 - SoC 3-Phase Energy Meter I/C RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel |
| 71M6513H-IGT/F | 功能描述:计量片上系统 - SoC 3-Phase Energy Meter I/C RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel |
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