Study on automatic power genrator

自动发电机的研究

基本信息

批准号：
14350078
负责人：
HOSAKA Hiroshi
金额：
$ 9.86万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

项目摘要

The miniaturization of power sources are strongly required as the mobile information instruments are becoming popular. In this research, various types of automatic power generators are proposed to answer this requirement. The generators are attached to a machine or a human, and convert the kinetic energy into electric energy. To convert an external vibration into a relative movement of a permanent magnet and a coil installed in the generators, three types of converting mechanism are proposed : vibrating mass, rotating mass, and rotating reel. The relationships between output power and the mass, the vibrating frequency, the angular velocity, electro-mechanical impedance of armature are studied theoretically and experimentally. As a result, the mechanical and electrical conditions to make the output power maximum are clarified. In addition, a medical sensor, an RF circuit and a measurement instrument are driven by using the developed generators. The outline of each generator is shown bel … More ow.1.Vibration type generatorThis type is highly effective to the input vibration of high frequency and small amplitude such as the machine vibration. The size of the prototype is about 10 cm. It generates 50mW by the vibration input of 6Hz and 4mm p-p. The coil of armature is divided into several parts, and the electromechanical impedance of the vibrating mass is controlled. As a result, this generator operates by the maximum efficiency under arbitrary input amplitude.2.Rotation type generatorThis type is highly effective to the input vibration of low frequency and large amplitude such as in the human and the buoy movements. In addition, when the self-excited rotation is induced, the power generation efficiency is increased greatly. The self-excited rotation is a phenomenon that the inertia body rotates like the giant swing by the vibration input. It is shown that the self excitation rotation is able to be generated by the control of the impedance of rotating mass and the control of the initial rotating velocity under arbitrary input vibration. The output power of 500μW is obtained by the prototype generator of the size of a wristwatch. The generated electric power was charged in a super capacitor and a pulse oxygen-meter and an RF circuit are driven by it.3.Rotating reel type generatorA generator installed in a digital tape measure is produced. The armature rotates by natural rotation of the tape reel. A tape position sensor and a liquid crystal circuit are driven by the generated electric power. When the tape is pulled once, the liquid crystal is driven for a few seconds. Less

随着移动信息仪器的普及，强烈要求电源的小型化，在这项研究中，提出了各种类型的自动发电机来满足这一要求。发电机附在机器或人身上，并转换动能。为了将外部振动转换为安装在发电机中的永磁体和线圈的运动，提出了三种类型的转换机构：振动质量、旋转质量和旋转卷轴。输出功率与质量之间的关系。，振动的对电枢的频率、角速度、机电阻抗进行了理论和实验研究，明确了输出功率最大的机械和电气条件，并给出了医用传感器、射频电路和测量仪器。各发电机的外形图如下所示。 1.振动型发电机这种类型对于机械振动等高频、小振幅的输入振动非常有效。大约10厘米，通过6Hz和4mm p-p的振动输入产生50mW。电枢线圈被分成几个部分，并且控制振动质量的机电阻抗，从而使该发电机以最大效率运行。 2、旋转式发生器该类型对于人体、浮标运动等低频大振幅的输入振动非常有效。感应自激旋转，发电效率大大提高自激旋转是惯性体受到振动输入而产生巨大摆动的现象。通过控制旋转质量的阻抗和控制任意输入振动下的初始旋转速度，由手表大小的原型发电机获得500μW的输出功率，所产生的电力被充电到超级电容器中。 3.旋转卷轴式发电机安装在数字卷尺上，通过卷轴的自然旋转产生发电机。卷轴位置传感器和液晶。当拉动胶带一次时，液晶就会被驱动几秒钟。