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PDF HAG240-SP-1 Data sheet ( Hoja de datos )
| Número de pieza | HAG240-SP-1 | |
| Descripción | AUTOMOTIVE CURRENT TRANSDUCER | |
| Fabricantes | LEM | |
| Logotipo |  |
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AUTOMOTIVE CURRENT TRANSDUCER
HAG 240-V/SP1
Introduction
Principle of HAG Family
The HAG Family is best suited for DC, AC or pulsed currents
measurement in high power and low voltage automotive
applications. It’s contains galvanic isolation between the primary
circuit (high power) and the secondary circuit (electronic circuit).
The HAG family gives you a choice of having different current
measuring ranges in the same housing (from ± 50 A up to
± 250 A).
Features
The open loop transducers use an Hall effect integrated circuit.
The magnetic flux density B, contributing to the rise of the Hall
voltage, is generated by the primary current IP to be measured.
The control current IP is supplied by a current source i.e. battery
or generator (Fig. 1).
Within the linear region of the hysteresis cycle, B is proportional
to:
B (IP) = constant (a) x IP
The Hall voltage is thus expressed by:
●● Open Loop transducer using the Hall effect sensor
●● Low voltage application
●● Unipolar + 5 V DC power supply
●● Primary current measuring range from 0 A up to 240 A
●● Maximum rms primary current limited by the busbar, the
magnetic core or the ASIC temperature T° < + 150°C
●● Operating temperature range: - 40°C < T° < + 125°C
●● Output voltage: full ratio-metric (in gain and offset).
VH= (RH/d) x I x constant (a) x IP
Except for IP, all terms of this equation are constant.
Therefore:
VH = constant (b) x IP
The measurement signal VH amplified to supply the user output
voltage or current.
Advantages
●● Good accuracy for high and low current range
●● Good linearity
●● Low thermal offset drift
●● Low thermal gain drift
●● Hermetic package.
+Vc
IP
Vout
-Vc
0V
Automotive applications
●● Battery Pack Monitoring
●● Hybrid Vehicles
●● EV and Utility Vehicles.
Primary current IP
Isolated output voltage
Fig. 1: Principle of the open loop transducer
090817/1
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
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1 page  
HAG 240-V/SP1
PERFORMANCES PARAMETERS DEFINITIONS
Output noise voltage:
The output voltage noise is the result of the noise floor of the
Hall elements and the linear IC amplifier gain.
Magnetic offset:
The magnetic offset is the consequence of an over-current on
the primary side. It’s defined after an excursion of IP max.
Linearity:
It’s the maximum positive or negative discrepancy with a
reference straight line VOUT = f (IP).
Unit: linearity (%) expressed with full scale of IP max.
VOUT Non linearity example
Reference
straight line
Max linearity error
Linearity variation in IN %
IP
Sensitivity:
The Transducer’s sensitivity G is the slope of the straight line
Vout = f (IP), it must establish the relation:
Vout = VC/5 (G x IP + 0.5)
Offset with temperature:
The error of the offset in the operating temperature Eoffset is
the relative variation of the offset in the temperature considered
with the initial offset at 25°C.
The offset variation TCVOUT in the operating temperature is the
slope of Eoffset = f(T).
Sensitivity with temperature:
The error of the sensitivity in the operating temperature is the
relative variation of sensitivity with the temperature considered
with the initial offset at 25°C.
The sensitivity variation TCεG in the temperature is the slope of
Eoffset = f(T).
Offset voltage @ IP = 0 A:
Is the output voltage when the primary current is null. The ideal
value of VO is VC/2. So, the difference of VO -VC/2 is called the total
offset voltage error can be attributed to the electrical offset. (due
to the resolution of the ASIC quiescent voltage trimming), the
magnetic offset, the thermal drift and the thermal hysteresis.
Response time (delay time) tr:
The time between the primary current signal and the output
signal reach at 90 % of its final values
I [A]
90 %
Ip
IN
Is
td
10 %
tr
t[µs]
Typical value @ TA:
The maximum of 90% of the values found in production.
090817/1
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
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| PDF Descargar | [ Datasheet HAG240-SP-1.PDF ] | |
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