OM13005,598 NXP Semiconductors, OM13005,598 Datasheet - Page 190

• Manufacturer Part Number: OM13005,598
• Description: BOARD EVAL EM773 METER US PLUG
• Manufacturer: NXP Semiconductors
• Type: Other Power Managementr

Specifications of OM13005,598

• Design Resources: Plug Meter Schematics, Gerber Files USB Dongle Schematics, Gerber Files
• Main Purpose: Power Management, Energy/Power Meter
• Embedded: Yes, MCU, 32-Bit
• Utilized Ic / Part: EM773FHN33,551
• Interface Type: USB
• Maximum Operating Temperature: + 150 C
• Operating Supply Voltage: 1.8 V to 3.6 V
• Product: Power Management Development Tools
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Primary Attributes: -
• Secondary Attributes: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: EM773, OL2381
• Other names: 568-6680

NXP Semiconductors
UM10415
User manual
16.5.2 Additional output for sinusoidal voltage and sinusoidal and
Apparent Power: S — The apparent power S in Volt-Ampere (VA) is measured as the
product of the RMS voltage and RMS current:
Active Power: P — The active power P in Watt (W) is measured according to:
Non-active Power: N — The non-active power N in Volt-Ampere-reactive (var) is
measured according to:
Power Factor: PF — The dimensionless parameter power factor PF is measured as the
ratio between active power and apparent power.
non-sinusoidal current
The Metrology Engine output described in this chapter provides additional information for
sinusoidal voltages and sinusoidal or non-sinusoidal currents.
According to IEEE Std 1459-2010 these calculations are valid if the voltage waveform has
significantly lower distortion than the current waveform. In this case the fundamental
active power P1 approximately equals the active power P described above.
Fundamental Reactive Power: Q1 — The fundamental reactive power in
Volt-Ampere-reactive (var) is measured according to:
In this formula, k is the index of the fundamental voltage samples v1 and fundamental
current samples i1 inside the Metrology Engine and T is the sample period of the
Metrology Engine.
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 10 September 2010
Q
1
=
P
N
kT
=
ω
=
PF =
S =
kT
τ
1
+
∫ ∫
τ
S
kT
τ
VI
i
2
1
+
∫
τ
[
−
P
S
kT
vidt
v
P
Chapter 16: EM773 Metrology engine
1
2
dt
]
dt
UM10415
© NXP B.V. 2010. All rights reserved.
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