Method for real-time estimation of temperatures of electric components in a power electronics system

A method for real-time estimation of temperatures of electric components in a power electronics system, the method comprising:

• obtaining a current reference temperature;
• obtaining current power loss values of the electric components;
• determining self-heating coefficients of the electric components for the obtained current power loss values;
• determining external heating coefficients of the electric components;
• and
• estimating the temperatures of the electric components in real-time based on the obtained current reference temperature, the determined self-heating coefficients and the determined external heating coefficients,
• wherein the step of obtaining the current power loss values of the electric components comprises square-edge approximation of the power loss over time for each one of the electric components such that the current power loss values are obtained for specified time steps,
• wherein the step of obtaining the current power loss values of the electric components further comprises decomposing the current power loss values of each one of the electric components for the specified time steps into power loss delta steps of each one of the electric components and storing the power loss delta steps,
• wherein each one of the power loss delta steps for a specified time step is stored in one of a predetermined number of storage locations,
• wherein the oldest power loss delta steps are deleted from the storage locations when the predetermined number of storage locations is full, and
• wherein a value from the deleted power loss delta steps is retained in the next power loss delta steps.