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For a quasisquare EMF brushless DC motor, its commutation corresponds to its EMF. Error commutation sequence not only affects torque and torque ripple, but also deteriorates commutation, or even damages inverter. This paper studies what will happen when there are mechanical and electrical errors in position sensor, and how to decrease errors.

无刷电机的换向直接与绕组反电势相对应,带有误差的换向逻辑不仅影响电机的出力和转矩的平稳性而且使换向恶化,严重时可损坏功率逆变桥.本文分析了位置传感器的机械误差和电气误差对换向的影响,指出了减小换向误差的途径.

Big turning error appeared during sine waggle of the turntable will affect the tracking accuracy of the system. The method of using variable-gain amplifier is proposed. The amplifier gain for forward channel of speed loop is designed into a function with system input speed as independent variable and it will be automatically adjusted with the variation of system speed. When the turntable runs at low speed, it has a big amplifier gain, a good rigidity and high tracking accuracy. When the turntable runs at high...

Big turning error appeared during sine waggle of the turntable will affect the tracking accuracy of the system. The method of using variable-gain amplifier is proposed. The amplifier gain for forward channel of speed loop is designed into a function with system input speed as independent variable and it will be automatically adjusted with the variation of system speed. When the turntable runs at low speed, it has a big amplifier gain, a good rigidity and high tracking accuracy. When the turntable runs at high speed, the method can control the amplifier gain and ensure the system dynamic performance. The experimental results show that the method can reduce turning error from 48 arcmin to 10 arcmin.

转台正弦摇摆时换向误差较大,影响系统的跟踪精度。对此,提出了一种变增益算法,将速度回路的前向通道放大倍数设计为一个以系统输入速度作为自变量的函数,使其随着系统速度的变化而自动调整。在低速运行时,放大倍数较大,提高系统刚度,可获得较高的低速跟踪精度;在高速运行时,控制放大倍数,以保证系统的动态性能。设计了两种变增益函数进行实验,实验结果表明,该方法可以把换向误差从48 减小到10,是一种较为实用和有效的设计方法。

This paper expatiates on applying the light electricity fixed position technique to correct error margin of stepping motor changing direction, and according to aero maneuverability reasonably choosing aero flight speed adopting kind period and stepping motor starting threshold, availably increasing speed-time control accuracy of automatic parachute opener in ejection seat.

阐述了应用光电定位技术对步进电动机的换向误差进行校正,并根据飞机的机动性能合理地选择飞机的速度采样周期和步进电动机的启动门限,有效地提高了飞机弹射座椅双态自动开锁器的速度一时间控制精度。

 
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