Microcontroller electro-optical information-measuring system for control of electric voltage and electric field strength

Computational methods for studying the thermal state of frequency-controlled asynchronous traction motors

“…During the transition from the load interval 𝑇𝑇 𝑙𝑙 to the idling interval 𝑇𝑇 𝑖𝑖 and from the idling interval to the load interval, the initial temperature values at intervals 𝑇𝑇 𝑙𝑙 and 𝑇𝑇 𝑖𝑖 for all nodes are determined by the formula: The current time t at each interval of each cycle starts from zero. The determination of the actual heating time is counted from the heating time of the reference unit, which selected the stator core of the electric motor [11][12][13][14][15][16]. In the calculations, the assumption is made: the thermal conductivity of the body material is large enough, the internal temperature differences of heating on the surface are determined by the time of actual heating of the support unit:…”