Methods and Systems Involving Electric Machine Controllers

The title of the invention is methods and systems involving electric machine controller. A method for operating a controller includes receiving a first accumulated thermal value of an electrical machine (107) and an associated first time stamp from a memory (106), initializing a processor (104) of the controller (102) with the first accumulated thermal value and the associated first time stamp (310), determining whether a second time stamp has been received, calculating a difference (314) between the second time stamp and the first time stamp responsive to determining that the second time stamp has been received, calculating a second accumulated thermal value as a function of the first accumulated thermal value, the first time stamp (318), and the second time stamp, and updating the first accumulated thermal value with the second accumulated thermal value (320).