参数资料
型号: ARD00280
厂商: Microchip Technology
文件页数: 19/50页
文件大小: 0K
描述: KIT REF DESIGN PIC18F87J72 1PH
设计资源: PIC18F87J72 BOM
PIC18F87J72 Schematics
PIC18F87J72 Gerber Files
标准包装: 1
主要目的: 电源管理,电度表/功率表
嵌入式: 是,MCU,8 位
已用 IC / 零件: PIC18F87J72
主要属性: 单相分流电度表
已供物品:
PIC18F87J72 SINGLE-PHASE ENERGY
METER REFERENCE DESIGN
Chapter 3. Calculation Engine and Register Description
3.1
CALCULATION ENGINE SIGNAL FLOW SUMMARY
RMS voltage, RMS current, Active Power and Apparent Power, and the calibration out-
put pulse are all calculated through the following process described in Figure 3-1. The
calibration registers for each calculation are shown as well as the output registers.
16/24-bit ΔΣ ADC
OFFSET_I_RMS: 16
X
ADC
CURRENT
X
2
RMS Current
Σ
Σ
X
Apparent Power
GAIN_
COMPENSATION
_90: 8
90° with
Φ Correction
X
Reactive Power
O FFSET_POWER_REACT:32
Σ
1 6/24-bi t DS ADC
Active Power
ADC
VOLTAGE
Φ
X 2
PH ASE_COMPENSATION:8
OFFSET_POWER_ACT: 32
OFFSET_V_RMS: 16
Σ
RMS Voltage
Digital to
Frequency
Converter
Digital to
Frequency
Converter
/
X
X
X
X
X
X
X
X
/
Σ
FIGURE 3-1:
Σ
PIC18F87J72 Calculation Engine Signal Flow
? 2011 Microchip Technology Inc.
DS51931A-page 19
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