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Development of Self-Sensing Control Technique for a Self-Bearing Motor

自轴承电机自传感控制技术的开发

基本信息

批准号：
12650223
负责人：
MATSUDA Ken-ichi
金额：
$ 1.79万
依托单位：
Ibaraki University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650223/
关键词：
Self-Bearing Motor Self-Sensing Pulse Width Modulation Differential Transformer

项目摘要

Application of self-sensing motor is considered, especially for small application such as a hard disk drive and an artificial heart pump. These systems require miniaturization and row power consumption of the actuator. Especially miniaturization of the actuator is the most important theme of the system development. However self-bearing motor is an active control system, which requires a certain type of sensor. Noncollocate configuration of the sensor and actuator might cause undesirable control property and existence of the sensor setting space becomes serious obstacle for miniaturization. To overcome these problems. this project proposes self-sensing control technique based on the principle of differential transformer.First, it was clarified that the mutual inductances between each of motoring windings and control windings has linear property for the radial direction displacement in both theoretical analysis and static self-sensing experiments. Next, noise reduction, installation of additional resonant circuit and appropriate regulation of the bandwidth of the self-sensing outputs were applied to the driving and detecting circuits to control rotor without any external sensors. Finally, self-sensing levitation control was succeeded at a specific angular position. Simultaneously the carrier component, which possesses information of the rotor displacement, changes by the angular position of the permanent magnet rotor and the value of control current. Hence the levitation control with rotation could not succeeded by those undesirable properties. However it shows a good property as a collocated sensor just levitation control and very high possibility of the self-sensing control of the self-bearing motor.

考虑了自感应电机的应用，特别是对于硬盘驱动器和人工心脏泵等小型应用。这些系统要求执行器的小型化和行功耗。特别是执行器的小型化是系统开发的最重要主题。然而自轴承电机是一种主动控制系统，需要某种类型的传感器。传感器和执行器的非配置配置可能会导致控制性能不佳，并且传感器设置空间的存在成为小型化的严重障碍。为了克服这些问题。本课题提出了基于差动变压器原理的自感控制技术。首先，理论分析和静态自感实验均阐明了各电机绕组与控制绕组之间的互感对于径向位移具有线性特性。接下来，对驱动和检测电路进行降噪、安装附加谐振电路以及适当调节自感输出带宽，以在无需任何外部传感器的情况下控制转子。最终在特定角度位置成功实现自感知悬浮控制。同时，拥有转子位移信息的载体分量根据永磁体转子的角位置和控制电流值而变化。因此，具有旋转的悬浮控制无法通过这些不良特性而成功。然而，它显示出作为并置传感器的良好特性，仅用于悬浮控制，并且自轴承电机的自感知控制的可能性非常高。