The Investigation on Applying Heat Pipes to The Heat Dissipation System in An Air-Cooled Electrical Induction Motor
Date Issued
2015
Date
2015
Author(s)
Su, Tsung-Wen
Abstract
This study investigated the effect of the application of heat pipes to the air cooling system on the working performance of the induction motor. There are two major experiments in this study: investigation of heat pipe cooling the heater at the small scale and the application of heat pipes to the air cooling system of the induction motor at real scale. There have been limited studies regarding heat dissipation capability and the total weight of cooling system in electric motor. The experimental results of the first study revealed that, in dissipating the same amount of wasted heat, the total weight of cooling system decreased by utilizing heat pipes as the cooling apparatus. In addition, the thermal resistance of heat pipes decreased with the increment of fins attached at the condensers of heat pipe, which is beneficial to the heat transfer. Furthermore, due to higher heat transfer coefficient of two-phase flow, heat pipes took less weight than conventional water-cool systems, which significantly decreased the weight needed in the vehicle. In the second investigation regarding heat dissipation of the induction motor, experiments were conducted by inserting the evaporators of heat pipes into the housing of an electrical induction motor and attaching fins to the condensers under air-cooling system. The results showed that the efficiency of the test motor increased and stator coil temperature decreased in the working condition of high speed and low torque, indicating the application of heat pipe facilitated heat dissipating ability of the cooling system. Such results imply that heat pipes serve as better heat dissipation apparatus than traditional water-cooling system because of better heat transfer capability, lightweight and less spaces needed in electric vehicles.
Subjects
heat pipe
thermal resistance
induction motor
efficiency
air cooling
Type
thesis
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