ABSTRACT
Temperature
rise ofthe most useful industrial work icon is ofmuch concern in the short and
long term operations of asynchronous motor. The main aim of the thesis was to
develop a thermal model for the asynchronous motor and to analyze the steady
state and transient state behavior of the induction motor. The system’s thermal
network is developed, using thermal resistances, capacitances and power losses,
the algebraic and differential equations for the proposed models are solved so
as to ascertain the thermal performances of the machine under steady and
transient conditions using the lumped parameter thermal method. To analyze the
thermal process, a 7.5kW machine was divided geometrically into seven lumped
components, each component having a bulk thermal storage and heat generation
and interconnections to adjacent components through a linear mesh of thermal
impedances. The lumped parameters were derived entirely from dimensional
information, the thermal properties of the materials used in the design, and
constant heat transfer coefficients. The thermal circuit in steady-state
condition consists of thermal resistances and heat sources connected between
the components nodes while for transient analysis, the thermal capacitances
were used additionally to take into account the change in internal energy of
the body with time. MATLAB programs were developed and used to solve the steady
and transient state mathematical model ofthe machine to obtain the curve response
ofthe temperature rise for the asynchronous motor core parts. The resulting
predicted temperature values for Frame-43.53°C, Stator Lamination-44.23°C,
Stator Winding-50.10°C, Rotor Iron42.89°C, Rotor bar-42.81°C,
EndwindingL—48.33°C and EndwindingR-32.58°C when compared with other result in
Induction machine, shows that this work can appropriately be employed to
predict the temperature distribution in induction machine and also provide
useful information to designers and industries on the thermal characteristics
ofthe induction machine.
EJIONYE, E (2024). Thermal Analysis of Asynchronous Motor:- Ejionye, Onyekachi C. Mouau.afribary.org: Retrieved Nov 23, 2024, from https://repository.mouau.edu.ng/work/view/thermal-analysis-of-asynchronous-motor-ejionye-onyekachi-c-7-2
EJIONYE, EJIONYE. "Thermal Analysis of Asynchronous Motor:- Ejionye, Onyekachi C" Mouau.afribary.org. Mouau.afribary.org, 25 Jun. 2024, https://repository.mouau.edu.ng/work/view/thermal-analysis-of-asynchronous-motor-ejionye-onyekachi-c-7-2. Accessed 23 Nov. 2024.
EJIONYE, EJIONYE. "Thermal Analysis of Asynchronous Motor:- Ejionye, Onyekachi C". Mouau.afribary.org, Mouau.afribary.org, 25 Jun. 2024. Web. 23 Nov. 2024. < https://repository.mouau.edu.ng/work/view/thermal-analysis-of-asynchronous-motor-ejionye-onyekachi-c-7-2 >.
EJIONYE, EJIONYE. "Thermal Analysis of Asynchronous Motor:- Ejionye, Onyekachi C" Mouau.afribary.org (2024). Accessed 23 Nov. 2024. https://repository.mouau.edu.ng/work/view/thermal-analysis-of-asynchronous-motor-ejionye-onyekachi-c-7-2