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Losses of capacitor run induction motor
Štaffa, Jiří ; Hájek, Vítězslav (referee) ; Mach, Martin (advisor)
This project deals with increasing efficiency of one phase induction motor with permanent split capacitor. We can whole thesis divide into two parts, the first one is basic and the second is interested in analysis and measurement. First part handles with construction of single phase induction motor, explanation of function principle, start and run of motor. Calculating of efficiency including type of losses, which reduce efficiency. Second part concerns analysis losses including moment load characteristic, motor measurement while rotor is locked, with no load operation, measuring mechanical and additional losses. Further there will be measured useful values for creation model for simulation (reactance of windings etc.). Than will be the model created in ANSYS Maxwell with module RMxprt. After analytic calculation in RMxprt and using Finite Element Method (FEM) load characteristics will be compared together. This comparison gives us information about accuracy of model for simulation. Simulation and measurement will be carried out on another engine with high quality ferromagnetic material used for magnetic circuit of motor. Further will be done simulation of motor with modifications shown in previous chapter for high efficiency.
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Single phase induction motor start optimization
Glogar, Jaroslav ; Hájek, Vítězslav (referee) ; Mach, Martin (advisor)
This bachelor thesis deals with the influence of capacitors on a start of a single phase induction machine and start optimization. The first two chapters refer to a theoretical part of the issue, describing construction, the function principle, the torque characteristic. Also used types are named there, a special emphasis is given to a split phase induction motor with the capacitor and auxiliary winding. It also describes the influence of the capacitor to a breakaway torque. The next part studies the analysis of the concrete machine by the laboratory measuring. Results of measured windings resistance, rated operation, load characteristic, mechanical losses and locked-rotor test are stated here. The main part of the thesis is dedicated to an optimization of wiring auxiliary winding, especially for breakaway torque. It is based on creating models in program ANSYS Maxwell, where an analytical calculation in module RMxprt and a calculation per finite element method (FEM) is realised. Three models are demonstrated here. The first one is identical with the measured machine, so with the permanent split capacitor. That model is created to be compared with the measuring. Another model has a capacitor start, and the last one has two capacitors – for start and run. For the last model the rotor cage with a reduced resistance of winding is used.
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Single phase induction motor start optimization
Glogar, Jaroslav ; Hájek, Vítězslav (referee) ; Mach, Martin (advisor)
This bachelor thesis deals with the influence of capacitors on a start of a single phase induction machine and start optimization. The first two chapters refer to a theoretical part of the issue, describing construction, the function principle, the torque characteristic. Also used types are named there, a special emphasis is given to a split phase induction motor with the capacitor and auxiliary winding. It also describes the influence of the capacitor to a breakaway torque. The next part studies the analysis of the concrete machine by the laboratory measuring. Results of measured windings resistance, rated operation, load characteristic, mechanical losses and locked-rotor test are stated here. The main part of the thesis is dedicated to an optimization of wiring auxiliary winding, especially for breakaway torque. It is based on creating models in program ANSYS Maxwell, where an analytical calculation in module RMxprt and a calculation per finite element method (FEM) is realised. Three models are demonstrated here. The first one is identical with the measured machine, so with the permanent split capacitor. That model is created to be compared with the measuring. Another model has a capacitor start, and the last one has two capacitors – for start and run. For the last model the rotor cage with a reduced resistance of winding is used.
|
|
|
Losses of capacitor run induction motor
Štaffa, Jiří ; Hájek, Vítězslav (referee) ; Mach, Martin (advisor)
This project deals with increasing efficiency of one phase induction motor with permanent split capacitor. We can whole thesis divide into two parts, the first one is basic and the second is interested in analysis and measurement. First part handles with construction of single phase induction motor, explanation of function principle, start and run of motor. Calculating of efficiency including type of losses, which reduce efficiency. Second part concerns analysis losses including moment load characteristic, motor measurement while rotor is locked, with no load operation, measuring mechanical and additional losses. Further there will be measured useful values for creation model for simulation (reactance of windings etc.). Than will be the model created in ANSYS Maxwell with module RMxprt. After analytic calculation in RMxprt and using Finite Element Method (FEM) load characteristics will be compared together. This comparison gives us information about accuracy of model for simulation. Simulation and measurement will be carried out on another engine with high quality ferromagnetic material used for magnetic circuit of motor. Further will be done simulation of motor with modifications shown in previous chapter for high efficiency.
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