The Range: LVTGO-VBS: Low Voltage Battery Simulator For EMC Standards & Robustness Testing


Hello my name is David Shaw. I’m here to
introduce the LVTGO-VBS, our low voltage EMC standards and robustness test system.
I’m going to talk about what the key elements of the system are, how they fit
together, and later I’ll show you how to build the right LVTGO for your needs.
First the basics. Embedded control systems can suffer adverse effects as a
result of power supply fluctuations. LVTGO simulates these fluctuations in the
workshop or lab, and so increases the range of testing possible during the
development of vehicle electronics. The LVTGO helps you to validate control
systems throughout the last half of the V-development cycle; that is during HIL,
labcar or prototype testing. A complete LVTGO system comprises two elements;
First the LV-Test GUI, and second the LVTGO hardware, that comes in a number
of form factors. The LV-Test GUI is a Windows program that controls the LVTGO
hardware. It allows you to specify and customised waveforms for delivery to a
device under test. It supports test triggering via CAN message, it allows
tests to be automated for the use of COM interfaces, and it can log delivered
waveforms. So we’ve seen the unit’s software, but how do we connect the unit
up? The LVTGO hardware is controlled via a link to a PC running LV-Test. In this
instance, we’re using our own adapter, COMMDongle. Depending on the voltage and
current requirements, the hardware draws power either directly from the mains,
from a car battery, or in this case, an external lab supply. Of course there are
also connections to the device under test, in this case represented by an
oscilloscope. On a basic level, that’s it, however advanced units can offer a means
to introduce noise onto the output signal, or connections to simulate
switched ignition outputs. The system’s firmware comes pre-programmed with many
common waveform types that can be configured, randomised and repeated.
What’s more, there’s onboard memory so customs CSV waveforms can be loaded
in for delivery to a device under test. So in summary once you have one of these
and one of these you’re good to go. So I mentioned how we can build the right LVTGO for you. As you can see, there are three form factors for the LVTGO
hardware – small midsize and large. However the contents of each form factor type
are not the same. The form factor of LVTGO hardware you’ll receive is related
only to the functionality you need from it. To find out what your requirements
are, we’ll ask a number of things. These include your current and voltage
requirements, the speed of voltage drop you need, which standards you’re testing
to if any, how you’d like your unit to be powered, if you’d like to introduce
voltage ripple, and if you need to simulate ignition key outputs. There is
currently LVTGO hardware to 80 volts making it suitable for many hybrid and
electric vehicle testing applications, as well as more traditional petrol and
diesel vehicles. Many thanks for watching. Next time we’ll look into some of the
more advanced functionality of the LVTGO.

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