STEVAL-IHP001V3 STMicroelectronics, STEVAL-IHP001V3 Datasheet - Page 45
STEVAL-IHP001V3
Manufacturer Part Number
STEVAL-IHP001V3
Description
BOARD SMART PLUG STM32 SPZB260PR
Manufacturer
STMicroelectronics
Series
Zigbee™ SmartPlugr
Type
Microcontroller, Energy Meteringr
Specifications of STEVAL-IHP001V3
Frequency
2.4GHz
For Use With/related Products
STM32F10x, SPZB260-PRO, STPM01
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-10677
- Current page: 45 of 60
- Download datasheet (2Mb)
STPM01
8.24.1
Figure 28. Active energy computation diagram
Equation 3
i(t) = I • sin (
where I is the peak current,
between voltage and current.
Active power
In the STPM01, after the pre-conditioning and the A/D conversion, the digital voltage signal
(which is dynamically more stable with respect to the current signal) is processed by a
differentiated stage which transforms:
Equation 4
v(t) → v’(t) = dv/dt = V
The resulted signal, together with the pre-processed and digitalized current signal:
Equation 5
i(t) = I
are then available for the calculation process. These digital signals are also provided into
two additional stages which perform the integration of themselves, obtaining:
⋅
sin(
ω
ω
t +
t +
ϕ
ϕ
); [see
);
⋅ ω ⋅
Figure 28
cos
ω
Doc ID 10853 Rev 7
is related to the line frequency and
ω
t − [see
- 6]
Figure 28
- 5]
ϕ
is the phase difference
Theory of operation
45/60
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