Sign in for a personalized NXP experience.
As car makers continue to improve each piece of the electrified powertrain, the role of the traction inverter continues to be central for energy efficient and robust EV systems. The traction inverter can make a difference in improved performance, better efficiencies and ultimately, longer driving range.
The traction inverter controls energy conversion between the energy source and the mechanical shaft of the electric motor, providing acceleration, regenerative braking and switch protection. As with each safety critical component within automotive applications, the ISO 26262 functional safety standard provides recommendations for the development process of safety system products with a V cycle project management tool. The tool identifies a series of parts to address the requirements of the standard.
Developing a clear safety concept for the traction inverter is therefore essential. To achieve this, it is necessary to identify the potential hazards and limitations of the EV application. There are typically safety concerns around unintended traction or braking, as well as the risk of electric shocks. This is the first step in defining the concept.
Along with this, the safety goals are developed and the functional safety architecture is defined. This combines hardware and software sub-element functions that are used to achieve the intended item and system functionality as well as the safety measures to protect those sub-elements.
We explain how this is applied through three simplified examples of safety architecture for EV traction systems. To learn more about defining the safety concept, read the whitepaper.
Antoine Dubois, Certified Functional Safety Expert
Antoine is Functional Safety system engineer in the CTO Safety team. His journey and passion for Electric vehicle started in his engineering school in Toulouse, France as a captain of an electric race car vehicle. Today he works in the world of functional safety, where he designs system safety architecture for the next generation electric and autonomous vehicles.
Erik Santiago, Certified Functional Safety Expert
Erik is a System Safety Architect for the automotive team, with particular interest in vehicle electrification and safety stories. Erik has a Master's degree in Electronics Engineering and 18 years experience at Tier 1 level developing powertrain and steering systems before coming into the challenges of safety semiconductors.
September 24, 2020
by Monica Davis
March 26, 2020
January 7, 2020