DSPIC33FJ128GP706A-I/MR Microchip Technology, DSPIC33FJ128GP706A-I/MR Datasheet - Page 99

IC DSPIC MCU/DSP 128K 64-QFN

DSPIC33FJ128GP706A-I/MR

Manufacturer Part Number
DSPIC33FJ128GP706A-I/MR
Description
IC DSPIC MCU/DSP 128K 64-QFN
Manufacturer
Microchip Technology
Series
dsPIC™ 33Fr

Specifications of DSPIC33FJ128GP706A-I/MR

Core Processor
dsPIC
Core Size
16-Bit
Speed
40 MIPs
Connectivity
CAN, I²C, IrDA, LIN, SPI, UART/USART
Peripherals
AC'97, Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
Number Of I /o
53
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
16K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 18x10b/12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-VFQFN, Exposed Pad
Product
DSCs
Processor Series
DSPIC33F
Core
dsPIC
3rd Party Development Tools
52713-733, 52714-737, 53276-922, EWDSPIC
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, DM240001, DV164033
Core Frequency
40MHz
Core Supply Voltage
3.3V
Embedded Interface Type
I2C, SPI, UART
No. Of I/o's
53
Flash Memory Size
128KB
Supply Voltage Range
3V To 3.6V
Rohs Compliant
No
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
© 2009 Microchip Technology Inc.
Given that the phase lag between the input voltage and current is φ, after PT and CT,
the actual measured active power is P', reactive power is Q'. RMS current is I, RMS
voltage is V, input apparent power is S, actual input active power is P and reactive
power is Q, then Figure C-11 can be drawn based on the principles of power triangle.
EQUATION C-66:
EQUATION C-67:
From the above 2 equations, we have:
EQUATION C-68:
EQUATION C-69:
Where:
EQUATION C-70:
EQUATION C-71:
By setting up certain input conditions, Δϕ can be measured, and then k
calculated.
In this design, we use an input of 0.5L for calibration. With this condition, Δϕ can be
calculated using the difference between the meaured and the actual input value of
active power. For accurate calculations, the user may also use the difference between
the measured cumulative energy and the actual cumulative energy to calculate the
difference.
EQUATION C-72:
Where err is the error rate of the energy measurement, which results from calculating
the error between the actual energy measured by a standard meter and the energy
measured by the dsPIC devices. The error can be obtained from the output of the meter
calibration workbench.
EQUATION C-73:
Δϕ
P'
Q'
=
=
=
a
cos
V I
V I
⋅ ⋅
⋅ ⋅
---------- -
2 P
err
P'
cos
sin
=
Power Calculation Theory
P
(
(
Q
φ
φ
k
k
P' P
------------- -
=
+
+
=
π
-- -
3
1
1
P
Δϕ
Δϕ
=
k
=
=
k
1
1
P'
Q' k
cos
)
)
a
sin
=
cos
+
=
=
Δ
Δϕ
Δ
------ -
k
ϕ
P
P
Q
2
2
P
(
Q'
P'
cos
cos
0.5
×
100
Δϕ
Δϕ
(
1
+
Q
P
err
sin
sin
)
Δϕ
Δϕ
)
π
-- -
3
DS51723A-page 99
1
and k
2
can be

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