STEVAL-IPE009V1 STMicroelectronics, STEVAL-IPE009V1 Datasheet - Page 34

• Manufacturer Part Number: STEVAL-IPE009V1
• Description: BOARD EVAL ST72321BR9/STPM14
• Manufacturer: STMicroelectronics
• Type: Other Power Managementr

Specifications of STEVAL-IPE009V1

• Main Purpose: Power Management, Energy/Power Meter
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: STPM14, ST72F321BR9T6
• Primary Attributes: 1-Ph 220 VAC, LCD Displays: No-Load, Reverse, Fraud, or Case Tampering
• Secondary Attributes: Up to 4 Tariff Rates, Data Accumulated for Meter Life, Time Stamp for: Tamper, Fraud, Power Failure
• Input Voltage: 220 V
• Product: Power Management Modules
• Silicon Manufacturer: ST Micro
• Silicon Core Number: ST72321BR9 And STPM14
• Features: Continuously Detects, Displays No-Load Condition, Reverse Direction, Fraud And Case Tamper Condition
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: STPM14, ST72321BR9
• Other names: 497-8434; STEVAL-IPE009V1

Energy calculation algorithm
8
Figure 22. Active energy computation diagram
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Energy calculation algorithm
Inside the STPM1x the computing section of the measured active power uses a completely
new patented signal process approach. This approach allows the device to reach high
performances in terms of accuracy.
The signals, coming from the sensors, for the instantaneous voltage is:
Equation 7
v(t) = V•sin ωt; where V is the peak voltage and ω is related to the line frequency
and the instantaneous current is:
Equation 8
i(t) = I • sin (ωt + ϕ); where I is the peak current, ω is related to the line frequency and ϕ is
the phase difference between voltage and current
Active power
Doc ID 13167 Rev 7
STPM11, STPM12, STPM13, STPM14