About High voltage inverter safety range
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About High voltage inverter safety range video introduction
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6 FAQs about [High voltage inverter safety range]
What is a functional safety concept for an HV traction inverter?
NXP has developed a functional safety concept for an HV traction inverter that addresses these two points. It defines several system deliverables that customers can use to build their own concept more quickly. Download the white paper * to learn more about functional safety concept for HV battery electric vehicles.
How safe is an EV HV inverter?
In the case of an EV HV inverter, the definition of the safe state is quite complex due to a high amount of energy flowing into the electrical motor. In some cases this can result in unstable behavior instead of ensuring the safe state that is requested by the system.
What is a safe state in an inverter?
This safe state open all the Phases of the Inverter. This safe state is only acceptable at low speed (see next slide). It is a preferred safe state when vehicle is stopped or at low speed. When the speed is unknown or when higher than the maximum back EMF allowed, the preferred safe state will be 3 phases short. Violation of safety Goal !
What is a safety goal for an EV HV inverter?
According to ISO 26262, these hazards are then ranked by risk level. A safety goal for an EV HV inverter could be to avoid unintended acceleration if the vehicle is stopped. Figure 2: Examples of hazards and safety goals for an EV HV inverter
What is an HV inverter for EVs?
In the example of an HV inverter for EVs, the functional assumption could be resumed as follows: an inverter is the main traction system of an electric vehicle. It controls energy conversion between an electric source (HV DC battery) and the mechanical shaft of the electric motor, based on torque requested from the vehicle control unit (VCU).
What is ISO Part 4 eV traction inverter?
· Technical safety architecture for the HV traction inverter, ISO Part 4 · System faults detection and reaction, ISO Part 4 Increasing market demand and legislation are driving the need for performance and functional safety in electric vehicles (EV). In particular, two new