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PDF BL6511 Data sheet ( Hoja de datos )
| Número de pieza | BL6511 | |
| Descripción | Three-phase Active Energy Meter | |
| Fabricantes | SHANGHAI BELLING | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de BL6511 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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Three-phase Active
BL0952A/BL6513/BL6511 Energy Meter
FEATURES
High accuracy, less than 0.1% error over a
dynamic range of 500:1
High stability during calibration, the fluctuation
of output CF is less than 0.1%.
Low drift, the gain variety is less than 0.1%
when input frequency changes from 45Hz to 65Hz
Single 5V Supply, Static Power 25mW(typical),
Power solution only with Resistor & Capacitor can be
adopted.
The Low Frequency Output (F1, F2) can drive
motor directly;
The High Frequency Output (CF) can be used in
calibration and data processing.
Selectable between the arithmetic sum of the
three-phase active energies and the absolute value
sum of these energies.
Measure positive active power and negative
active power.
Anti-Fault, the Logic Output REVP indicates a
Potential Miswiring or Negative Power for each
phase.
On-chip Creep Protection.
On-chip Power Supply Monitoring.
On-chip Reference 2.42V ± 8%,with External
Overdrive Capability.
SOP24 package.
Interrelated patents are pending
GENERAL DESCRIPTION
The BL0952A/BL6513/BL6511 is the chief IC of
the three-phase electrical meter and a high accuracy
energy measurement IC. With low power design,
static power is only 25mW. Based on the features such
as superior accuracy, high stability and simple
peripheral circuit, the BL0952A/BL6513/BL6511 is
compatible with 3-phase 3-wire and 3-phase 4-wire
configurations.
BL0952A/BL6513/BL6511 is based on digital
signal processing. BL0952A/BL6513/BL6511 can
measure positive active power and negative active
power; can select the way to calculate the sum of the
three-phase active powers, between the arithmetic
sum and the absolute value sum.
The high frequency output CF can be used in
calibration and data processing. The low frequency
outputs F1 and F2 can be used to drive a pulse-motor
or an electromechanical counter. In this way, the
power can be measured and the energy can be
recorded.
The internal phase matching circuitry ensures
that the current and voltage channels are phase
matched.An internal no-load threshold ensures that
the BL0952A/BL6513/BL6511 does not exhibit any
creep when there is no load.
The BL0952A/BL6513/BL6511 consider
emphatically the need of stability during calibration,
the measure data of mass products show that the
output pulse ripple of CF is less than 0.1%.
System Diagram Block
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Fig.1 Functional block diagram
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BL0952A/BL6513 Three-phase Active
Energy Meter
TERMINOLOGY
1) MEASUREMENT ERROR
The error associated with the energy measurement made by the BL0952A/BL6513/BL6511 is
defined by the following formula:
Pencentage Error = Energy Registered by the BL6513 − True Energy ×100%
True Energy
2) NONLINEAR ERROR
The Nonlinear Error is defined by the following formula:
eNL%＝[（Error at X-Error at Ib）/(1+Error at Ib )]*100%
When V(V)= ±110mV, cosϕ=1, over the arrange of 5%Ib to500%Ib, the nonlinear error
should be less than 0.1%.
3) POSITIVE AND NEGATIVE REAL POWER ERROR
When the positive real power and the negative real power is equal, and V(V) =±110mV, the
test current is Ib, then the positive and negative real power error can be achieved by the following
formula:
eNP%=|[(eN%-eP%)/(1+eP%)]*100%|
Where: eP% is the Positive Real Power Error; eN% is the Negative Real Power Error.
4) START-UP CURRENT
When Ib=5A,C=800,cosϕ=1,Voltage Channel Input ±110mV rms, 5％Ib error in normal
range, the min AC current in current loop.
5) GAIN ERROR
The gain error of the BL0952A/BL6513/BL6511 is defined as the difference between the
measured output frequency (minus the offset) and the ideal output frequency. The difference is
expressed as a percentage of the ideal frequency. The ideal frequency is obtained from the
BL0952A/BL6513/BL6511 transfer function.
6) POWER SUPPLY MONITOR
BL0952A/BL6513/BL6511 has the on-chip Power Supply monitoring The
BL0952A/BL6513/BL6511 will remain in a reset condition until the supply voltage on VDD
reaches 4 V. If the supply falls below 4 V, the BL0952A/BL6513/BL6511 will also be reset and no
pulses will be issued on F1, F2 and CF.
Timing Characteristics
(VDD=5V, AGND=DGND=0V, on chip Reference, CLKIN=3.58MHz, TMIN to TMAX =
-40~+85°C)
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BL0952A/BL6513 Three-phase Active
Energy Meter
By adjusting the external capacitor Cf, the phase error can be corrected. The phase error will affect
the system gain when PF is 0.5, and bring error.
The process of BL0952A/BL6513/BL6511 can ensure the consistent compensatory value.
Power Supply Monitor
The BL0952A/BL6513/BL6511 contains an on-chip power supply monitor. If the supply is
less than 4V ± 5% then the BL0952A/BL6513/BL6511 will go in an inactive state, i.e. no
energy will be accumulated when the supply voltage is below 4V. This is useful to ensure correct
device operation at power up and during power down. The power supply monitor has built-in
hysteresis and filtering. This gives a high degree of immunity to false triggering due to noisy
supplies.
The trigger level is nominally set at 4V, and the tolerance on this trigger level is about
± 5% . The power supply and decoupling for the part should be such that the ripple at VDD does
not exceed 5V ± 5% as specified for normal operation.
Digital-To-Frequency Conversion
After multiplication，the low-pass filter is used to attenuate the ac components at the line
frequency and its harmonics. Then the three phase real powers are sent to the adder, and the
arithmetic sum or the absolute value sum (selectable by the pin ADDSEL) can be obtained. The
power sum is passed to the digital-to-frequency converter. In the digital-to-frequency, the power
signal is integrated over time to produce an output frequency. This accumulation of the signal will
suppress any non-dc component in the instantaneous real power signal. Because the average value
of a sinusoidal signal is zero, the frequency generated by the digital-to-frequency is proportional
to the average real power.
Figure 9 shows the calculating process of the output CF:
Fig.9 Real Power-to-Frequency Conversion
As can be seen in the diagram, the output frequency CF is generated by accumulating the
instantaneous real power signal over a much shorter time, while converting it to a frequency. Due
to the short accumulating time, there are still ripple in the CF. This will not be a problem in the
application. Where CF is used for calibration purposes, the frequency should be averaged by the
frequency counter. This will remove any ripple. After the output frequency CF, by other
digital-to-frequency converter, the lower output frequency F1 and F2 are obtained. Because the
outputs F1 and F2 operate at a much lower frequency, much more averaging of the instantaneous
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Total 11 Pages
4/21/2009
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet BL6511.PDF ] | |
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