STEVAL-IPE008V1 STMicroelectronics, STEVAL-IPE008V1 Datasheet - Page 45
![BOARD EVAL STPM01/STR715FR0](/photos/9/9/90966/steval-ipe008v1_sml.jpg)
STEVAL-IPE008V1
Manufacturer Part Number
STEVAL-IPE008V1
Description
BOARD EVAL STPM01/STR715FR0
Manufacturer
STMicroelectronics
Type
Other Power Managementr
Specifications of STEVAL-IPE008V1
Main Purpose
Power Management, Energy/Power Meter
Embedded
Yes, MCU, ARM7
Utilized Ic / Part
STPM01, STR715FR0
Primary Attributes
3-Ph Energy Meter (or Single Phase)
Secondary Attributes
Measures Active, Reactive, Apparent Power
Product
Power Management Modules
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
STPM01, STR715FR0
Other names
497-6412
STEVAL-IPE008V1
STEVAL-IPE008V1
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