Chroma ATE introduces the Chroma 8620 OBC and DC-DC Converter Power HIL Testbed for testing electric vehicle charging systems and powertrain components. Hardware configuration can be adapted according to DUT specifications, with options including a programmable DC power supply, programmable DC electronic load, digital power meter, and oscilloscope. Chroma 8620 can be applied to different system architectures and boasts expansion and sharing of the platform.
Chroma 8620 is specially designed for the research and development of onboard chargers (OBC) or DC-DC converters. Its flexible software provides user interfaces for the operation and monitoring of manual and automated test functions and automatically generates comprehensive test reports. Users can quickly conduct large numbers of repeated tests, improving test coverage and efficiency.
Chroma 8620 supports the loading of Altair Activate models or Model-Based vehicle models so that users can continuously apply existing vehicle models, saving the trouble and time of redevelopment. Moreover, CAN HS/FD and LIN communication interfaces can load DBC and LDF communication files.
For functional testing, Chroma 8620 can simulate normal operating conditions of the DUT in a real vehicle environment. It can also simulate abnormal operating conditions, including communication abnormalities and signal faults (Open Circuit, Short to Ground, Short to Battery, Pin-to-Pin Short). This serves to avoid possible hazards during the charging process or when the vehicle is on the road. Laboratory simulation testing not only diminishes the risk of accidents in the actual vehicle but also eliminates the high costs associated with using real vehicles for testing.
VEHICLE DEVELOPMENT PROCESS AND TEST REQUIREMENTS
Chroma 8620 OBC and DC-DC Converter Power HIL Testbed support the hardware-in-the-loop test from the ISO 26262 V-model for functional safety in the development of road vehicles. It includes failure mode, functional hazard analysis, and potential risk functions related to the OBC and DC-DC converter in the design stage of the V-model. Various vehicle conditions can be simulated and tested on the bench. Users can discover and correct problems early, well before entering real vehicle tests, which helps in obtaining ASIL (Automotive Safety Integrity Level) accreditation. The testbed allows for the expansion or replacement of peripheral equipment to meet the test requirements of different DUT specifications. Also, by simply modifying existing programming, users can begin a new test project without starting from scratch. Chroma 8620 allows for highly repetitive automated tests and reduces possible errors caused by continuous manual programming of test specifications. Not only can this testbed reduce the number of tests and development costs, but it also helps to shorten the test time and improve overall test efficiency.
Chroma 8620 has an independent PLC monitoring system, which can track the running status of the system software and test hardware in real-time. When an error occurs, the protection and warning mechanisms are activated to avoid damage to the equipment and the DUT. The flexible software platform allows users to load CAN HS/FD and LIN communications files as well as combine real-time systems, power and measurement equipment, and vehicle models. This provides easy to perform real-time dynamic tests on OBC and DC-DC converters. The user interfaces and automated test procedures are so flexible they can be edited even during the execution of manual or automated tests. Automated test functions support upper-level test software using an ASAM XIL interface. After the test procedure is completed, test reports are automatically generated for convenient review of test changes and results. While testing, the test data can also be recorded and accessed in TDMS, CVS, and Text formats, for additional analysis.
Both the user interfaces and auto test procedures allow repeated editing or copying into new projects, so users can adapt test plans and apply them to different DUTs or projects. Additionally, in autotest procedures, users can implement well-known languages such as LabVIEW, C/C++, Python, and .NET, to increase flexibility, reduce repetitive engineering, and improve overall development efficiency.
OPTIMIZED TEST ITEMS & USER INTERFACES
Chroma 8620 adapts automated test sequences through its software platform. Besides editing the test procedures for OBC and DC-DC converter regulations, it is customized for editing specific functions for different DUTs, including power-on and power-off, normal and abnormal communication, and signal fault injection, and other functions. Additionally, it simulates different control flows, time changes, and fault behaviors to increase the overall test coverage. Users can complete tests that cannot be performed on a real vehicle, prevent mistakes that could result in personal injury, and improve hazard analysis and risk assessment early on.
The customizable user interfaces are based on system integration of both power and measurement equipment, along with vehicle model types. Through the UI, users can execute tests and observe data content in real-time, including parameter changes, chart display, signal statuses, etc., thus offering a great test experience and improved efficiency.
STANDARD SYSTEM ARCHITECTURE
Chroma 8620 supports customized hardware configuration. In addition to the standard configuration of the stand-alone main rack, it can also be equipped with an extension rack for optimal use of test space.