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| 型号： | 71M6545-IGT/F |
| 厂商： | Maxim Integrated |
| 文件页数： | 107/133页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METERING |
| 标准包装： | 160 |
| 系列： | * |
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71M6545/71M6545H Data Sheet
The RMS values can be computed by the MPU from the squared current and voltage samples as follows:
Ix RMS =
IxSQSUM ? LSB I ? 3600 ? F S
N ACC
Vx RMS =
VxSQSUM ? LSB V ? 3600 ? F S
N ACC
Other transfer variables include those available for frequency and phase measurement, and those reflecting
the count of the zero-crossings of the mains voltage and the battery voltage. These transfer variables are
listed in Table 74 .
MAINEDGE_X reflects the number of half-cycles accounted for in the last accumulated interval for the AC
signal of the phase specified in the FREQSEL[1 :0] field of the CECONFIG register ( CE RAM 0x20[7:6]) .
MAINEDGE_X is useful for implementing a real-time clock based on the input AC signal.
Table 74: Other Transfer Variables
≈ 0 . 509 ? 10 ? 6 Hz(for CT)
2184 Hz
2520 Hz ? 6
2
CE
Address
0x82
0x83
0x94
0x95
Name
FREQ_X
MAINEDGE_X
PH_AtoB_X
PH_AtoC_X
Description
Fundamental frequency: LSB ≡ 32
2
LSB ≡ 32 ≈ 0 . 587 ? 10 Hz(for Shunt)
The number of edge crossings of the selected voltage in the previous
accumulation interval. Edge crossings are either direction and are
de-bounced.
Voltage phase lag. The selection of the reference phase is based on
FREQSEL[1:0] in the CECONFIG register:
If FREQSEL[1:0] selects phase A: Phase lag from A to B.
If FREQSEL[1:0] selects phase B: Phase lag from B to C.
If FREQSEL[1:0] selects phase C: Phase lag from C to A.
Angle in degrees is (0 to 360): PH_AtoB_X * 360/N ACC + 2.4*15/13 (for CT)
Angle in degrees is (0 to 360): PH_AtoB_X * 360/N ACC + 2.4 (for Shunt)
If FREQSEL[1:0] selects phase A: Phase lag from A to C.
If FREQSEL[1:0] selects phase B: Phase lag from B to A.
If FREQSEL[1:0] selects phase C: Phase lag from C to B.
Angle in degrees is (0 to 360): PH_AtoC_X * 360/N ACC + 4.8*15/13 (for CT)
Angle in degrees is (0 to 360): PH_AtoC_X * 360/N ACC + 4.8*15/13 (for Shunt)
Phase angle measurement accuracy can be increased by writing values > 1 into V_ANG_CNT
( V_ANG_CNT indicates how many accumulation periods to sum PH_AtoB_X and PH_AtoC_X
over. The MPU then has to divide by that number. For standard CE codes that support shunts
with remotes, V_ANG_CNT is at CE address 0x53. For standard CE codes that support shunts
with CT, V_ANG_CNT is at CE address 0x55. For other than standard CE codes, contact Maxim
for information).
5.4.9
Pulse Generation
Table 75 describes the CE pulse generation parameters.
The combination of the CECONFIG PULSE_SLOW (CE RAM 0x20[0] ) and PULSE_FAST (CE RAM 0x20[1] )
bits controls the speed of the pulse rate. The default values of 0 and 0 maintain the original pulse rate
given by the Kh equation.
WRATE ( CE RAM 0x21 ) controls the number of pulses that are generated per measured Wh and VARh
quantities. The lower WRATE is the slower the pulse rate for measured energy quantity. The metering
constant Kh is derived from WRATE as the amount of energy measured for each pulse. That is, if Kh =
v2
107
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 71M6545-IGTR/F | 功能描述:计量片上系统 - SoC Metrology Proc. (3P 64K Flsh .1%) 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 |
| 71M6545T-IGT/F | 制造商:Maxim Integrated Products 功能描述:METROLOGY PROCESSORS - Rail/Tube |
| 71M6545T-IGTR/F | 制造商:Maxim Integrated Products 功能描述:3-PHASE AFE, 32KB FLASH, PRES TEMP SENSOR - Tape and Reel |
| 71M6601 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:On-Chip Temperature Sensor Enables Localized Digital Temperature On-Chip Power Monitoring |
| 71M6601-IF | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:On-Chip Temperature Sensor Enables Localized Digital Temperature On-Chip Power Monitoring |
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