A Productive Utility for New Energy Vehicle LV123 Standards Tests Chroma High Voltage DC Power Supply Test Software

Complying with global energy conservation trends and policies driven by international governments, many automakers have released technical development standards for next generation vehicles, which define various electric vehicle tests for hybrid, plug-in hybrid and fuel cell vehicles. Chroma has integrated these regulatory requirements aiming to provide users with specialized and convenient test programs making Chroma a productive partner for testing new energy vehicles.

The test requirements of LV123 are defined by major European carmakers to test the electrical characteristics and safety of high-voltage components in road vehicles, such as HV battery system, inverter, electrical air conditioning compressor, electrical transmission oil pump, DC/DC converter HV/LV and On-board charger, etc. This standard defines the state and operating capability of each voltage range.

The LV123 standard regulates different states for voltage range from 0V to 800V, as shown in the table below, and demands rapid voltage slew rate change. Chroma’s 62150H-1000 DC power supply supports 0-1000V voltage output with up to 40V/ms slew rate control and can meet the LV123 basic electrical characteristics requirements through the test items listed below providing the best solution for testing new energy vehicles.

HV voltage ranges Unit HV_1 HV_2a HV_2b HV_3
Overvoltage at load dump V pk 220 410 500 800
Upper HV circuit limit voltage V pk 220 410 500 800
Maximum operating voltage V d.c. 200 360 470 770
Upper limited operating capability >V d.c. > 190 – 220 > 340 – 460 > 450 – 470 > 750 – 770
Unlimited operating capability V d.c. 90 – 190 170 – 340 250 – 450 520 – 750
Lower limited operating capability V d.c. 80 -< 90 160 -< 170 200 -< 250 450 -< 520
Highly limited operating capability V d.c. 60 -< 80 120 -< 160 200 -< 250
Undervoltage V d.c. 0 -< 60 0 -< 120 0 -< 150 0 -< 450

The following test items are provided according to the LV123 standard.

  1. Range of unlimited operating capability
  2. Range of upper limited operating capability
  3. Range of lower limited operating capability
  4. Range of highly limited operating capability

Chroma integrated the voltage range operating capability of LV123 into the 62000H Series DC power supplies and developed graphical test software based on the regulatory criteria so that the user can perform tests on the UUT with only one key. This not only saves time in the development schedule but also facilitates testing automotive electronics for their long-term performance and stability.

Range of unlimited operating capability
Range of unlimited operating capability

Range of upper limited operating capability
Range of upper limited operating capability

Range of lower limited operating capability
Range of lower limited operating capability

Range of highly limited operating capability
Range of highly limited operating capability

To learn more about the computer graphical user interface:

<Introduction to Softpanel for Model 62000P&H Series>
<Programmable DC Power Supply Model 62000H Series>


The Newest Electrical Mains and Power Line Interference Simulation Testing Software for Download

In recent years, renewable energy has received lots of attention in particular the huge growth of solar energy and wind power. More and more power systems incorporating into the grid could have a significant impact on the current power system. Thus, many standards were set up for integrating renewable energy into the grid such as UL 1741, IEEE 1547, IEEE 1547.1, and NBT 32004, etc.

Moreover, the Low Voltage Ride-Through (LVRT) feature put forward by various countries stipulates that the grid-connected device such as a solar inverter or wind power generator will continue to supply power, when the grid voltage falls, for a period of time until the grid power returns to normal.

To address these requirements, Chroma has released testing software that can simulate the abnormality/distortion of the electrical mains and power line interference. This graphical human-machine interface software controls Chroma’s regenerative grid simulator, the 61800 Series, which is equipped with four quadrant capabilities to satisfy test demands.

In the example below, the power dropped to 0V for 150ms and resumed 70% of output for 550ms, and then spent 800ms to rise from 70% to 90% output capacity. All these conditions can be easily simulated using the software LIST mode. In addition, a preview of the waveform can be seen on the software.

61800 Softpanel

Chroma’s AC Source Software has functions for , LIST mode, STEP mode, PULSE mode, and User-Defined Waveforms (to simulate distorted or interfered mains power). Also, the inter-harmonic test function can simulate the abnormality of the main electrical power.

Screenshots for the software are shown below:

61800 Softpanel

For more information about our testing software, please visit our website:

If you would like to download a demo version to experience the software, please email your preferred method of contact to http://www.chromaate.com/Survey?n=90a3e829-3ad1-4068-a961-2013cc402ea3. Chroma is here to serve you.

Chroma ATE Inc.

Chroma Test Equipment Designated by IFEC 2017 for Power Supply Competition

<Note: This article was released on September 6>
The IFEC, initiated by IEEE, is an international student competition for innovation, conservation, and effective use of electrical energy, which is open to college and university student teams from recognized engineering programs in any location.

Chroma, the world’s leading manufacturer of test instrumentation, has been the only official designated equipment sponsor for three consecutive years and recently participated in the competition held at the Virginia Polytechnic Institute in the United States. A Chroma 8000 Automated Test System (ATS) was customized to perform the test items for the competition where students were to create high efficiency, high density isolated DC-DC converters. The data measured by the Chroma 8000 ATS was used as the evaluation criteria and the test items are summarized as below:

Test Items Measurements
Steady State Test Output boltage, ripple voltage, efficiency
Load Transient Response Test Output voltage waveform, positive/negative overshoot voltage
Burn-in Test Output voltage, ripple voltage, efficiency

To cope with the competition requirements for high accuracy and high current slew, the 8000 ATS was equipped Chroma’s 63600 Series high precision electronic load with a sampling rate of up to 500k Hz and a 2A/µs current slew rate. Combined with the open software architecture of the Chroma 8000 ATS, a complete test report was generated to give the judges an important reference to rate the competition entries.

IFEC2017-Chroma ATS 8000
▲Chroma 8000 ATS Used by IFEC 2017

With more than 30 years of experience in precision instrumentation, Chroma is a leader of automated test systems specialized in a variety of power electronics testing. To adapt to new energy development, Chroma has been actively developing test solutions for solar energy, electric vehicles, and battery packs industries to satisfy their customer’s demands.

Chroma was proud of contributing the industry experience in this international energy design competition and will continue to sponsor the 2018 IFEC helping to nurture the future elite in the field of electronics. The IFEC 2017 competition results will be announced on the IFEC official website soon. For detailed information, please refer to the URL below:

IFEC Official Website: http://energychallenge.weebly.com/


Chroma 8000 ATS