Research On Novel Induction Machine With Inner And Outer Double Rotors

Now, the energy is becoming shorter day by day, to developing of a new type of induction machine with high efficiency has a very important meaning and a broad application prospect. For increasing the operation performance of the induction machine, a novel induction machine with inner and outer double rotors has been put forward by the SIEMENSE of Germany and Dr. Neuberger etc. in the Esslingen University of Technology of Germany in 2002. A sample has been made of, and a patent has been applied for.The structure of the induction machine with inner and outer double rotors is greatly different from the conventional AC Induction Machine. Especially, when the machine has less pole number (for example 2 or 4 pole), the resistor and leakage inductance of the stator winding are less and the excited inductance is large relatively. Therefore, the efficiency and the power factor are increased. It is a high efficiency machine. But the research with the machine is very principium, the method of study and design is still on the seeking stage.The paper first analyses the special structure of the machine and the working principle, studies on the base electro magnetism theory of the machine .The method of how to calculate the magnetic loop has been researched. The method of the magneto motive force and electro-motive force has been built. The equivalent magnetic loop and electric circuit have been given. It prepares a theory base for analysing and designing the machine.Second, base on the magnetic field analyse software of ANSYS , the paper analyses the magnetic field of the machine. The systematic model of the stator and the inner and the rotors has been built. The no-load magnetic field distributing and rotating circumstances of the machine has been calculated. The contrast analyzed of the calculation result of the magnetic field and designing result has been given.Third, the paper analyses the magnetic field of the induction machine with inner and outer double rotors. The mathematics model of the dynamic analysis of the induction machine with inner and outer double rotors has been built. The restrain of the end voltage has been given. The motion equation of the machine has been given. The simulating of the machine on the start process and the motion specific property has been finished. Base on these, the contribution of the inner and outer rotors working for the machine was analyzed.At last, the paper studies on the electromagnetism design of the induction machine with inner and outer double rotors. A sample with 1 lkW has been designed. The comparison with the performance and parameter of the induction machine with inner and outer double rotors and the conventional induction machine has been given. All the structure papers of the sample have been finished. Base on the electromagnetism calculate program of the conventional induction machine, the special design method of the machine on the magnetic loop and the winding parameter has been researched. All the calculation formula of the machine on the performance has been sum up. Moreover, the existing mechanical structure of the machine has been improved. Applied for a new practical patent in our country, and obtained the right (The patent No.ZL2004200C0230. 7)...