- 您现在的位置：买卖IC网 > PDF目录20610 > 71M6545-IGTR/F (Maxim Integrated)IC ENERGY METER 3PHASE 64LQFP PDF资料下载
参数资料
| 型号： | 71M6545-IGTR/F |
| 厂商： | Maxim Integrated |
| 文件页数： | 100/133页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METER 3PHASE 64LQFP |
| 标准包装： | 1,500 |
| 系列： | * |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页当前第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页第124页第125页第126页第127页第128页第129页第130页第131页第132页第133页
71M6545/71M6545H Data Sheet
5.4
5.4.1
CE Interface Description
CE Program
The CE performs the precision computations necessary to accurately measure power. These computations
include offset cancellation, phase compensation, product smoothing, product summation, frequency
detection, VAR calculation, sag detection and voltage phase measurement. All data computed by the CE
is dependent on the selected meter equation as given by EQU[2:0] ( I/O RAM 0x2106[7:5] ).
The standard CE program is supplied by Maxim as a data image that can be merged with the MPU
operational code for meter applications. Typically, this CE program covers most applications and does
not need to be modified. Other variations of CE code may be available from Maxim. The description in
this section applies to CE code revision CE43A01A.
5.4.2
CE Data Format
All CE words are 4 bytes. Unless specified otherwise, they are in 32-bit two’s complement format
(-1 = 0xFFFFFFFF). Calibration parameters are defined in flash memory (or external EEPROM) and
must be copied to CE data memory by the MPU before enabling the CE. Internal variables are used in
internal CE calculations. Input variables allow the MPU to control the behavior of the CE code. Output
variables are outputs of the CE calculations. The corresponding MPU address for the most significant
byte is given by 0x0000 + 4 x CE_address and by 0x0003 + 4 x CE_address for the least significant byte.
5.4.3
Constants
Constants used in the CE Data Memory tables are:
?
?
?
?
?
?
?
?
?
Sampling Frequency: F S = 32768 Hz/15 = 2184.53 Hz.
F 0 is the fundamental frequency of the mains phases.
IMAX is the external rms current corresponding to 250 mV pk at each IADC input.
VMAX is the external rms voltage corresponding to 250 mV pk at each VADC input.
N ACC , the accumulation count for energy measurements is SUM_SAMPS[12:0] (I/O RAM 0x2107[4:0],
0x2108[7:0]) . This value also resides in SUM_PRE ( CE RAM 0x23 ) where it is used for phase angle
measurement.
The duration of the accumulation interval for energy measurements is SUM_SAMPS[12:0] /F S .
X is a gain constant of the pulse generators. Its value is determined by PULSE_FAST and PULSE_SLOW
(see Table 68 ) .
Voltage LSB = VMAX * 7.879810 -9 V.
VMAX = 600 V, IMAX = 208 A, and kH = 3.2 Wh/pulse are assumed as default settings.
The system constants IMAX and VMAX are used by the MPU to convert internal digital quantities (as
used by the CE) to external, i.e. metering quantities. Their values are determined by the scaling of the
voltage and current sensors used in an actual meter. The LSB values used in this document relate digital
quantities at the CE or MPU interface to external meter input quantities. For example, if a SAG threshold
of 80 V peak is desired at the meter input, the digital value that should be programmed into SAG_THR (CE
RAM 0x24) would be 80 V/ SAG_THR LSB , where SAG_THR LSB is the LSB value in the description of
SAG_THR (Table 69 ) .
The parameters EQU[2:0], CE_E, and SUM_SAMPS[12:0] , essential to the function of the CE are stored in
I/O RAM (see 5.2 for details).
100
v2
相关PDF资料 |
PDF描述 |
|---|---|
| T95S224M035LZAL | CAP TANT 0.22UF 35V 20% 1507 |
| GBC12DCSN-S288 | CONN EDGECARD 24POS .100 EXTEND |
| 78M6612-M/F/P2 | IC PWR MEASUREMENT AC 68SQFN |
| V48C28H75BL2 | CONVERTER MOD DC/DC 28V 75W |
| ISL6613IRZ-T | IC MOSFET DRVR SYNC BUCK 10-DFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| 71M6601-IL | 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 |
发布紧急采购，3分钟左右您将得到回复。