Introduion
The DHABfamily is suited for DC, AC or pulse current measurement in high power and low voltage automotive
Principle of the DHAB Family
The open loop transducers use an Hall effe IC. The magnetic induion B, contributing to the rise of the Hall voltage, is generated
applications. It’s contains a galvanic isolation between the
by the primary current I
to be measured.
primary circuit (high power) and the secondary circuit
(eleronic circuit).
The control current I
p |
or generator (Fig. 1).
is supplied by a current source i.e. battery
The DHABfamily has a dual current range. It gives you the choice of having different peak currents (from
+/- 20A up to +/- 600A) in the same housing.
I |
P |
Features
Open loop transducer using the Hall effe sensor
V |
Low voltage application
H |
Unipolar +5VDC power supply
Primary current measuring range up to &plun; 100A for range 1
W ithin the linear region of the hysteresis cycle, B is proportional to :
P |
(B) = constant (a) x I
The Hall voltage is thus expressed by :
P |
= (K/d) x I x constant (a) x I
P |
V |
Except for I , all terms of this equation are constant.
and +/- 600A for range 2
Maximum r.m.s primary admissible current: defined by primary cable to have T° < +150°C
Operating temperature range : - 40°C < T° < +125°C
Therefore:
P |
H |
H |
= constant (b) x I
Output voltage:
The measurement signal V
amplified to supply the user output
fully ratio-metric (gain and offset)
2 measuring ranges to have a better accuracy.
Advantages
Good accuracy for high and low current range
Good linearity
Low thermal offset drift Low thermal gain drift Hermetic package.
Automotive applications
Battery Pack Monitoring
Hybrid Vehicles
EV and Utility Vehicles.
voltage or current.
