公开(公告)号：US20040111233A1

公开(公告)日：2004-06-10

申请号：US10678686

申请日：2003-10-03

申请人： Leopold Kostal GmbH & Co. KG

发明人： Tobias Gerlach

IPC分类号： G06F015/00 ,  G01P003/00

CPC分类号： H02P7/2805 ,  H02P7/0094

摘要： A method for determining the rotational position of a motor drive shaft includes counting detected ripples contained in a motor current signal as the shaft is driven. Whether a ripple expected to be contained in the current signal at a probable time is absent from within a tolerance band containing the probable time of the expected current ripple is determined. If the expected ripple is absent from within the tolerance band containing the probable time, then whether a ripple is detected after the tolerance band of the expected ripple is determined. If a ripple is detected after the tolerance band and the expected ripple is absent from within the tolerance band, then the expected ripple is counted as a detected ripple. The determined rotational position of the shaft is based on the counted ripples. The length of the tolerance band dynamically changes as a function of a motor operating state.

摘要翻译： 一种用于确定电动机驱动轴的旋转位置的方法包括当轴被驱动时对包含在电动机电流信号中的检测到的波纹进行计数。 确定在可能的时间内预期包含在当前信号中的波动是否在包含预期电流纹波的可能时间的容限带内被确定。 如果在包含可能时间的容限范围内不存在预期纹波，则在确定预期纹波的容限带之后是否检测到纹波。 如果在公差带之后检测到纹波，并且在公差带内不存在预期纹波，则将预期纹波计数为检测到的纹波。 所确定的轴的旋转位置基于计数的波纹。 公差带的长度随电机运行状态的变化而动态变化。

公开(公告)号：US20040098213A1

公开(公告)日：2004-05-20

申请号：US10678799

申请日：2003-10-03

申请人： Leopold Kostal GmbH & Co. KG

发明人： Tobias Gerlach

IPC分类号： G06F019/00 ,  G01R023/16

CPC分类号： G01P3/44 ,  G01P3/48 ,  H02P7/0094

摘要： A method for determining the frequency of current ripples contained in the armature current signal of a commutated direct current (DC) motor includes determining frequency spectral results of the current signal and of a motor electric operating parameter. The frequency spectral results are subtracted from one another to determine the frequency spectral result of the current ripples contained in the current signal. The current ripple frequency is determined from the frequency spectral result of the current ripples contained in the current signal. The operating parameter may be the armature voltage signal, or the armature current signal at a different motor operating state than the motor operating state of the current signal used in the step of determining the current signal frequency spectral result. The rotational speed of a motor shaft is determined based on the current ripple frequency. The shaft rotational position is determined based on the rotational shaft speed.

摘要翻译： 用于确定包含在换向直流（DC）电动机的电枢电流信号中的电流纹波频率的方法包括确定电流信号和电动机电动操作参数的频谱结果。 频谱结果相互减去，以确定当前信号中包含的电流纹波的频谱结果。 当前纹波频率由当前信号中包含的电流纹波的频谱结果确定。 操作参数可以是在确定当前信号频谱结果的步骤中使用的当前信号的电动机工作状态下的电动机电压信号或不同电动机运行状态下的电枢电流信号。 电机轴的转速根据电流纹波频率来确定。 轴旋转位置基于旋转轴速度来确定。

公开(公告)号：US20040107071A1

公开(公告)日：2004-06-03

申请号：US10685089

申请日：2003-10-07

申请人： Leopold Kostal GmbH & Co. KG

发明人： Tobias Gerlach

IPC分类号： G01C017/00 ,  G01C019/00

CPC分类号： H02P6/18 ,  H02P7/0094

摘要： A method for determining the position of a shaft of a commutated direct current (DC) motor based on the current ripples contained in an armature current signal includes digitally sampling the armature current signal to generate signal values at sampling points. The signal value corresponding to a current sampling point and selected signal values corresponding to previous sampling points in a time interval containing the sampling points are compared. Either a rising or falling slope detection signal is generated if the comparison is indicative of either an increasing or decreasing tendency in the magnitudes of the signal values. The rising and falling slope detection signals are respectively indicative of rising and falling current ripple slopes. A current ripple signal is generated if rising and falling slope detection signals are generated one after the other in a given period. The shaft position is determined based on the current ripple signal count.

摘要翻译： 基于包含在电枢电流信号中的电流波纹来确定换向直流（DC）马达的轴的位置的方法包括对电枢电流信号进行数字采样以在采样点产生信号值。 比较对应于当前采样点的信号值和与包含采样点的时间间隔中的先前采样点对应的选定信号值。 如果比较指示信号值的幅度的增加或减小的趋势，则产生上升或下降斜率检测信号。 上升和下降斜率检测信号分别表示上升和下降电流波纹斜率。 如果在给定的周期内一个接一个地产生上升和下降的斜率检测信号，则产生电流纹波信号。 轴位置根据当前纹波信号计数确定。

公开(公告)号：US20040100250A1

公开(公告)日：2004-05-27

申请号：US10680823

申请日：2003-10-07

申请人： Leopold Kostal GmbH & Co. KG

发明人： Tobias Gerlach

IPC分类号： G01P003/46 ,  G01B007/30

CPC分类号： H02P7/0094 ,  G01P3/48 ,  H02P7/2805

摘要： A method for determining the position of an element driven by the drive shaft of a commutated direct current (DC) motor includes counting current ripples detected in an armature current signal as the motor rotatably drives the shaft. A frequency spectral analysis of the armature current signal is performed to determine frequency components of the armature current signal. The frequency components are analyzed to determine which of the frequency components is indicative of the current ripple frequency. The current ripple frequency is monitored for changes over time while the motor drives the shaft. The number of counted ripples is modified upon a change in the current ripple frequency in a time interval if the current ripple frequency change deviates from the current ripple frequency more than a threshold deviation for the time interval. The rotational position of the shaft is determined based on the modified number of counted ripples.

摘要翻译： 用于确定由换向直流（DC）电动机的驱动轴驱动的元件的位置的方法包括当电动机可旋转地驱动轴时，对电枢电流信号中检测到的电流波纹进行计数。 执行电枢电流信号的频谱分析以确定电枢电流信号的频率分量。 分析频率分量以确定哪些频率分量表示当前纹波频率。 当电机驱动轴时，监测当前纹波频率随时间的变化。 如果当前纹波频率变化偏离当前纹波频率大于时间间隔的阈值偏差，则在时间间隔内当前纹波频率的变化修改计数波纹数。 轴的旋转位置基于经修改的计数的波纹数确定。