AN3322 datasheet(13/38 Pages) STMICROELECTRONICS

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AN3322 数据表(PDF) 13 Page - STMicroelectronics

部件名	AN3322

功能描述	Watt-hour meter based on the STM32F101 microcontroller

PDF	38 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

13 / 38 page

DocID18304 Rev 1

13/38

AN3322

Watt-hour meter using the STM32

1.8

Power and energy measurement by STM32 embedded ADC

This section gives a complete overview of the whole hardware and firmware of the STM32

power meter design. Figure 5 shows a block diagram of the firmware, Figure 6 and Figure 7

show the physical realization of the current and voltage path.

Figure 5. Complete block diagram of the algorithm used in STM32 power meter

Figure 5 shows the algorithm flow measurement.



A fast measurement of the current and voltage with injected noise from surrounding

environment triggered by network synchronized timer



Decimation of measured samples



RMS values computation



Use of a precise RTC clock source for energy computation.

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