Automatic Temperature Regulation System of Locomotive Traction Induction Motors With Power Losses Minimization

Kosmodamianskii, A. S.; Vorobiev, V. I.; Пугачев, А. А.

doi:10.7251/jit1501013k

Cited by 2 publications

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“…Montsinger [4] that the degradation speed of winding insulation doubles at 8 degree rising over the maximum operating temperature. Moreover, the windings temperature changing leads to the quality derating of the control systems [5]. It concerns, first of all, the complex control systems, such as vector control and direct torque control systems, in which the accuracy of speed control depends on accuracy of the stator and rotor resistance identification.…”

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Investigation of induction motor temperature distribution in traction applications

Пугачев

Kosmodamianskii

2017

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. The relevance of thermal behavior investigation of traction induction motors is shown. The brief survey of techniques to monitor the temperature of an induction motors is carried out. The detailed multi-node equivalent thermal circuit of an induction motor is designed for steady state. The calculation technique of some units' thermal resistances by using of construction features and geometric sizes of an induction motor is shown. Results of thermal processes calculation for 14 kWAO-63-4 induction motor are shown. The adequacy of proposed thermal model is proved by means of good convergence of calculated results with the results obtained by the experimental investigation on the same induction motor. As a result of investigation, it is established that the slot winding of the stator located about on 2/3 of its length from the cooling air entrance has the highest value of temperature. IntroductionDifferent researches dedicated to induction motor electric drives show that the thermal conditions of the motor affect both motor reliability and performance of the control systems [1,2]. The windings temperature is established to defy lifetime insulation; it is one of a main factors causing an insulation aging [3]. So, it was found by V.M. Montsinger [4] that the degradation speed of winding insulation doubles at 8 degree rising over the maximum operating temperature. Moreover, the windings temperature changing leads to the quality derating of the control systems [5]. It concerns, first of all, the complex control systems, such as vector control and direct torque control systems, in which the accuracy of speed control depends on accuracy of the stator and rotor resistance identification. Also, the temperature changing affects the efficiency of an electric drive. It becomes crucial for drives with control systems providing the minimum of power losses. To overcome or mitigate the temperature influence, the control systems have to have the correct data about actual temperature in real time. This problem has essential meaning in traction electric drives where thermal condition of electric drives is harder predictable due to a peculiarity of operation mode. So, regardless of exact traction application, i.e. railway or mining railway locomotives, the traction induction motors operate, mostly, with high torques and low speeds that causes the higher thermal stresses on the motor windings. The other factor to influence complexity of thermal state of the traction motor is a cooling system set, in many cases, separately from the actual thermal condition. In some part of general and mine locomotives park, the auxiliary motors driving the cooling fans and pumps are supplied directly from the sinchronous

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