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| 型号： | 71M6515H-DB |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 31/66页 |
| 文件大小： | 0K |
| 描述： | BOARD DEMO 71M6515H 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： | 71M6515H |
| 已供物品： | 2 个板，线缆，CD，电源 |
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71M6515H Demo Board User’s Manual
Now that we know the A XV , A XI , and φ S errors, we calculate the new calibration voltage gain coefficient from
the previous ones:
CAL _ V NEW =
CAL _ V
A XV
? tan( φ S ) 1 + ( 1 ? 2 ? 9 ) 2 ? 2 ( 1 ? 2 ? 9 ) cos( 2 π f 0 T ) ] ?
[
]
? ( 1 ? 2 ) sin( 2 π f 0 T ) ? tan( φ S ) 1 ? ( 1 ? 2 ) cos( 2 π f 0 T ) ?
We calculate PHADJ from φ S , the desired phase lag:
PHADJ = 2 20 ? ? 9 ? 9 ?
And we calculate the new calibration current gain coefficient, including compensation for a slight gain
increase in the phase calibration circuit.
PHADJ ? 2 ( 1 ? 2 ? 9 ) cos( 2 π f 0 T ))
PHADJ ( 2 + 2
CAL _ I NEW =
CAL _ I
A XI
1 +
2
? 20
1
? 20
1 ? 2 ( 1 ? 2 ? 9 ) cos( 2 π f 0 T ) + ( 1 ? 2 ? 9 ) 2
2.1.6
CALIBRATION FOR METERS WITH ROGOWSKI COIL SENSORS
Rogowski coils generate a signal that is the derivative of the current. The 6515H Rogowski module
implemented in the Rogowski CE image digitally compensates for this effect and has the usual gain and
phase calibration adjustments. Additionally, calibration adjustments are provided to eliminate voltage
coupling from the sensor input.
Current sensors built from Rogowski coils have a relatively high output impedance that is susceptible to
capacitive coupling from the large voltages present in the meter. The most dominant coupling is usually
capacitance between the primary of the coil and the coil’s output. This coupling adds a component
proportional to the derivative of voltage to the sensor output. This effect is compensated by the voltage
coupling calibration coefficients.
As with the CT procedure, the calibration procedure for Rogowski sensors uses the meter’s display to
calibrate the voltage path and the pulse outputs to perform the remaining energy calibrations. The
calibration procedure must be done to each phase separately, making sure that the pulse generator is
driven by the accumulated real energy for just that phase. In other words, the pulse generator input should
be set to WhA, WhB, or WhC, depending on the phase being calibrated.
The IC has to be configured for Rogowski mode ( IMAGE =01). In preparation of the calibration, all calibration
parameters are set to their default values. VMAX and IMAX are set to reflect the system design parameters.
WRATE and PUSE_SLOW , PULSE_FAST are adjusted to obtain the desired Kh.
Step 1: Basic Calibration : After making sure VFEED_A , VFEED_B , and VFEED_C are zero, perform either the
three measurement procedure (2.1.4) or the five measurement calibration procedure (2.1.5) described in the
CT section. Perform the procedure at a current large enough that energy readings are immune from voltage
coupling effects.
The one exception to the CT procedure is the equation for PHADJ—after the phase error, φ s, has been
calculated, use the PHADJ equation shown below. Note that the default value of PHADJ is not zero, but
rather –3973.
PHADJ = PHADJ PREVIOUS ? φ S 1786
50
f 0
If voltage coupling at low currents is introducing unacceptable errors, perform step 2 below to select non-
zero values for VFEED_A , VFEED_B , and VFEED_C .
Revision 2.0
? Copyright 2005 TERIDIAN Semiconductor Corporation
31 of 66
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 71M6515H-IGT | 制造商:Maxim Integrated Products 功能描述:METERING FRONT END - Rail/Tube |
| 71M6515H-IGT/F | 功能描述:计量片上系统 - SoC Energy Meter IC 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 |
| 71M6515H-IGTR | 制造商:Maxim Integrated Products 功能描述:71M6515H-IGT - T/REEL - Tape and Reel 制造商:Maxim Integrated Products 功能描述:Metering Systems on a Chip - SoC Energy Meter IC |
| 71M6515H-IGTR/F | 功能描述:计量片上系统 - SoC Energy Meter IC 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 |
| 71M6515H-IGTW/F | 功能描述:计量片上系统 - SoC Energy Meter IC 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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