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    • 4. 发明专利
    • Controller for synchronous motor
    • 同步电机控制器
    • JP2011211796A
    • 2011-10-20
    • JP2010075629
    • 2010-03-29
    • Hitachi Ltd株式会社日立製作所
    • TAKANO HIROMICHIOHASHI TAKANORIYONEMOTO SHINJIYANADA TETSUOMATSUMOTO YUTAKA
    • H02P23/00H02P6/10
    • PROBLEM TO BE SOLVED: To suppress a speed ripple with an irregular amplitude by creating a correction for suppressing the speed ripple of a synchronous motor due to a cyclic disturbance, based on a preset parameter.SOLUTION: The switch 22 of a cyclic disturbance corrector 19 is switched off, and a constant speed command Nref is inputted to rotate the synchronous motor 4. At this time, a cyclic disturbance correction signal h(θ) is not supplied to an adder 6 from the cyclic disturbance corrector 19, and it operates in the state where a speed ripple caused by the cyclic disturbance Txst is not suppressed. In such a state, a PC23 for adjustment of a controller fetches and monitors a current command Iref, and finds a phase adjustment amount θofst, an order B, and an amplitude function f(θ) with a motor rotational position θ as a variable, and generates h(θ)=f(θ) sin(B θ+θ+ofst) as a cyclic disturbance correction signal h(θ), based on this parameter, and adds it to the adder 6.
    • 要解决的问题:基于预设参数,通过产生用于抑制由于循环扰动引起的同步电动机的速度纹波的校正来抑制具有不规则振幅的速度波动。解决方案:循环扰动校正器19的开关22 并且输入恒定速度指令Nref以使同步电动机4旋转。此时,循环扰动校正信号h(θ)不从循环扰动校正器19提供给加法器6,并且其操作在 不会抑制由循环扰动Txst引起的速度波动的状态。 在这种状态下,用于调节控制器的PC23提取并监视电流指令Iref,并且以电动机旋转位置θ为变量,求出相位调整量θofst,阶数B和振幅函数f(θ) 并根据该参数生成h(θ)= f(θ)sin(Bθ+θ+ ofst)作为循环扰动校正信号h(θ),并将其加到加法器6。