MCP3909RD-3PH3 Microchip Technology, MCP3909RD-3PH3 Datasheet - Page 90

Manufacturer Part Number

MCP3909RD-3PH3

Description

REF DESIGN FOR MCP3909 W/18F2520

Manufacturer

Microchip Technology

Datasheets

1.MCP3909T-ISS.pdf (44 pages)

2.MCP3909T-ISS.pdf (104 pages)

3.MCP3909RD-3PH3.pdf (88 pages)

4.MCP3909-ISS.pdf (40 pages)

Main Purpose

Power Management, Energy/Power Meter

Utilized Ic / Part

MCP3909, PIC18F2520, PIC18F4550

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Secondary Attributes

Embedded

Primary Attributes

Lead Free Status / RoHS Status

Lead free / RoHS Compliant, Lead free / RoHS Compliant

MCP3909 / dsPIC33F 3-Phase Energy Meter Reference Design

DS51723A-page 90

minimal (<0.01%). When the input frequency deviates from the multiple of cycle

frequencies, the calculation error increases rapidly. As the calculation error is related

to the frequency offset to the multiple of freqency point, the calculation error caused by

frequency offset can be corrected. Figure C-6 is the error analysis after frequency off-

set correction using simple parabolic interpolation. Calcultion errors for all parameters

are shown to be less than 0.015% after the correction.

FIGURE C-5:

Iterations.

FIGURE C-6:

Compensation.

Error Analysis Of Improved Quasi-sync Calculation Using 3

Calculation Error Analysis After The Frequency Offset