9818246808

Zeszyły Problemowe ~ Maszyny Elektryczne Nr 86/2010

NOWE POLOWO-ZORIENTOWANE ŚRODOWISKO KOMPUTEROWE DO OBLICZEŃ KONSTRUKCYJNYCH KLATKOWYCH SILNIKÓW INDUKCYJNYCH

NEW FIELD-ORIENTED ENVIRONMENT FOR COMPUTER-ASSISTED DESIGN OF INDUCTION MACHINES

Abstract: This paper describes an emiromnent for Computer assisted design of three-phase sąuirrel cage induction machines. The fmite element method is used as a computational teclmique to appropriately account for detailed geometrical propcrtics. skew. materiał nonlinearity and deep-bar effect. It enablcs determination of all electromagnetic quantities tliat are usually of interest of designers of electrical machines directly from the model. Besides of that it contains module for design optimizatioa The design of experiment is used as a principal optimization technique. Sample results including measurements and the results of optimization are presented.

Zbigniew Goryca, Politechnika Radomska, Radom Mariusz Malinowski, Politechnika Warszawska, Warszawa

PRĄDNICA DO MAŁEJ BEZPRZEKŁADNIOWEJ ELEKTROWNI WIATROWEJ

GENERATOR FOR SMALL GEARLESS WIND POWER PLANT

Abstract: The paper presents design of generator for smali gearless wind power plant. It is multi-pole machinę. whose cogging torque has been minimized through the application of odd number of stator teeth. De-signing calculations of fiat model of generator were carried out with the use of package COMSOL Multiphys-ics v3.3 using fmite element method. The simulation result shows negligible value of cogging torque for such solution. The generator has Iow mass at the power of 6kW and the speed of 150 rev/min.

Piotr Zientek, Roman Niestrój Politechnika Śląska, Gliwice

WPŁYW USZKODZEŃ KLATKI WIRNIKA NA WARTOŚĆ NAPIĘĆ I PRĄDÓW WAŁOWYCH W SILNIKACH INDUKCYJNYCH

INFLUENCE OF SQUIRREL CAGE FAULTS ON SHAFT VOLTAGE AND CURRENTS VALUES IN INDUCTION MOTORS

Abstract: The paper presents initial results of laboratory imestigations. These results emphasize the intensifi-cation of the phenomena connected with bcaring currents flow at different rotor cage damages. In the section 3 is presented the influence of rotor cage damages on the sliaft voltage value. The subject of these studies was a Iow power induction motor (fig. 3), taking into consideration easiness and Iow costs of necessary modemiza-tion of it. On the figurę 4 is presented the diagram of the shaft voltage and current measurement system. The measurements results are presented on the figures 10, 11. 12. Conelusions drawn from laboratoiy researches are presented in chaptcr 4.