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Research for accurate control of induction motors using amorphous core field sensors

非晶铁心磁场传感器精确控制感应电机的研究

基本信息

批准号：
60550280
负责人：
YAMASAKI Jiro
金额：
$ 1.34万
依托单位：
Kyushu Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1987
项目状态：
已结题

项目摘要

1. Detections of secondary current and electric torque of induction motors using amorphous microcore field sensors: The robust field sensor was constituted using amorphous microcore field sensors: The robust sensor was constituted using an amorphous core multivibrator with a negative feedback. Stable current detection was done for the core temperature variation of - 200 ゜C to 200 ゜C. Stable detection of the secondary current (I_2) of a squirrel-cage induction motor (IM) was carried out setting the 8 pairs of amorphous cores around two endrings. Ripple-less torque detection was done multiplying two phase I_2 by two phase main flux. Basis of construction of accurate vector control systems for IM with torque feedback loops was established.2. Detections of the slip frequency and the secondary current of IM using a shaft core field sensor: Accurate slip frequency vector control systems require direct detections of the slip frequency (sf) and I_2. These were stably detected constituting a field sensor using a magnetic multivibrator with two coils set around a IM shaft.3. Sinusoidal magnetic encoder: Accurate ac servomotors require accurate detection of the rotor position using a high-performance encoder. A new magnetic encoder was constituted using 100 pairs of amorphous microcores set around a 100-pole ring magnet. 1 million pulses for one rotation of the magnet is possible due to cancellations of irregular distribution of field strength at each pole, influence of the off-center motion of the shaft, and external disturbance fields in the starshaped amorphous core group.

1.采用非晶微磁芯磁场传感器检测感应电动机的次级电流和电动转矩：采用非晶微磁芯磁场传感器构成鲁棒磁场传感器：采用具有负反馈的非晶磁芯多谐振荡器构成鲁棒传感器。在-200 ℃ ~ 200 ℃的核心温度变化范围内进行了稳定的电流检测。在鼠笼式异步电动机两端环上设置8对非晶铁芯，实现了对二次电流I2的稳定检测。无脉动转矩检测采用两相I_2乘以两相主磁通的方法。为构建具有转矩反馈的永磁同步电动机精确矢量控制系统奠定了基础.使用轴芯磁场传感器检测IM的转差频率和二次电流：精确的转差频率矢量控制系统需要直接检测转差频率（sf）和I_2。这些被稳定地检测到，构成一个磁场传感器，使用磁多谐振荡器与两个线圈设置在IM轴周围。正弦磁编码器：精确的交流伺服电机需要使用高性能编码器精确检测转子位置。利用100对非晶微磁芯围绕100极环形磁铁构成一种新型磁编码器。由于消除了每个磁极处的场强的不规则分布、轴的偏心运动的影响以及星形非晶芯组中的外部干扰场，磁体的一次旋转可以产生1百万个脉冲。