DEVELOPMENT RESEARCH OF THE MAGNET WHEEL FOR MAGNETIC LEVITATION VEHICLE

磁轮是具有感应式斥力和推力的电磁装置。本研究使以下事实变得清晰。对于磁轮的设计：1.单位磁体体积的升力近似与磁极磁通分布的基本因子成比例。磁体长度与极距长度的最佳比值为2/3 ~ 5/6.2。当极距约为差距长度的20倍时，极数越大，性能越好。对于外径为20 cm、差距为5 mm的磁轮，四极配置最佳.从单位体积升力特性考虑，永磁体在磁化方向上的最佳厚度为2cm左右。单位驱动功率的升力近似只与导电板的表面电导率成正比，导电板的表面电导率定义为电导率乘以厚度的值。以自驱动磁轮为单位：5。电枢轭架的设计虽然增加了电机的重量，但能有效地提高电机的驱动力矩和升力.与普通电机旋转相比，磁轮结构紧凑，重量轻.在磁悬浮车辆上使用四个单元的自驱动磁轮：8。磁轮对自身重量有足够大的升力，悬浮所需的驱动力的一半可以转换为推力。9.该方法消除了转矩分量，实现了无振动的稳定悬浮。

The magnet wheel is the electromagnetic device with the induction type repulsive force and thrust. This research made the following facts become clear.For the design of the magnet wheel :1. The lift force per magnets volume is approximately proportional to the fundamental factor of flux distribution of magnet poles. The optimum ratio of the length of magnet to the length of pole pitch is from 2/3 to 5/6.2. When the pole pitch about 20 times the gap length is given, the larger the number of poles is , the performance is better. For the magnet wheel with a 20cm outside diameter a the gap of 5mm, four-pole configuration is best.3. The optimum thickness of permanent magnet in the magnetizing direction is about 2cm in the viewpoint of lift force per volume characteristics.On the conducting plate :4. The lift force per driving power is approximately proportional only to the surface conductivity of conducting plate, which is defined as the value of the conductivity multiplied by the thickness.On the unit of self-driven magnet wheel :5. The yoke of armature is effective to increase the driving torque and the lift force, although the weight increases.6. The very compact and light magnet wheel could be realized, compared with the method using as ordinary motor for the rotation.7. The power factor at the input for the drive can be almost 1.0 in spite of the induction repulsive levitation.On the maglev vehicle using four units of the self-driven magnet wheels :8. The magnet wheel has the sufficiently large lift force against the own weight, and the half of driving power required for the levitation can be converted into the thrust.9. The component of torque is canceled, and the stable levitation without vibration can be obtained.