Method to control electric starter generator for gas turbine engines

A gas turbine engine starting system comprising:

• a systems controller that:
• receives a plurality of sensor inputs, wherein the plurality of sensor inputs comprises a sensed engine speed and a sensed ambient air temperature;
• determines a future temperature of at least one subcomponent of an electrical start generator (ESG), wherein the prediction of the future temperature is based on the plurality of sensor inputs and a plurality of ESG historical thermal information;
• and
• stores the future temperature on a non-transitory storage medium.

A method of starting a gas turbine engine comprising:

• receiving a plurality of sensor information, wherein the plurality sensor information includes sensed engine speed, sensed ambient temperature, and sensed oil temperature;
• modifying a first starting condition for an electric starting generator (ESG) based on the plurality of sensor information and a plurality of historical ESG thermal information, wherein the plurality of historical ESG thermal information includes a plurality of historical temperature data of a respective plurality of ESG subcomponents;
• and
• sending the first starting condition to an ESG controller that controls the ESG.