Research On Axial Flux Permanent Magnet Linear Synchronous Machine

Nowadays, because of the environment problem, the internal combustion engine is going to be replaced by the Stirling system in some area. The axial flux permanent magnet linear synchronous machine researched in this paper is one part of the Stirling system. To fulfill the needs in the special application, this paper does some work in design, analysis, optimization and experiments about this machine.With the help of the software Ansoft, I designed a 1kW power axial flux permanent magnet linear synchronous machine. And then some optimization work about this machine is done, including the outer diameter of the mover, the width of the permanent magnet, the height of the permanent magnet and the current desity in the copper. Two kinds of construction about this kind of machine are discussed. At last, some figures about the output performance of this machine are listed.We analysis the detent force of the permanent magnet linear synchronous machine. The detent force mainly contains two parts: the ending force and the slot force. The expressions of the ending force and slot force are gived and we can find some ways to decrease the ending foce. Some methods to decrease the slot force are also listed. But we should notice there maybe some other negative effect. I have researched two applied ways which can be used in the prototype to decrease the fluctuation of the output force.When the machine is working, the temperature in this machine is not allowed to be higher than 140 centigrade degrees. So I used the software Ansys to simulate the working temperature in this machine. After the simulation, we find the highest temperature of the machine occurred in the copper and the value of the highest temperature is in the safe region. And then we discuss the output performance if the velocity is not constant. We find the output performance if the velocity is not constant is more useful than the output performance if the velocity is constant.We finally manufacture a prototype. And then I take the non-load experiments and load experiments about the prototype. The load experiments contain resistance experiments and the storage battery experiments. The maximum velocity of these experiments is only one third of the designed velocity.. These are also some problems during these experiments and I discuss the reasons. We find the output voltage of the non-load experiments is according with the designed value.