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公开(公告)号：US08212508B2
公开(公告)日：2012-07-03
申请号：US12208206
申请日：2008-09-10
IPC分类号： H02P6/18
CPC分类号： H02P6/182 , H02P2209/07 , H02P2209/11
摘要： In a three phase BLDC motor the rotor position is monitored by detecting the zero crossing points of the induced back EMF signals BEMF_U, BEMF_V, BEMF_W in the phase windings U, V, W. As they are illustrated, the back EMF signals are substantially sinusoidal but they may in other situations be substantially trapezoidal. The three back EMF signals are 120° out of phase with each other. In order to accurately monitor the back EMF in a phase winding, the driving waveform for each phase U, V, W includes an undriven period P close to the expected zero crossing point. The period P can be a preset part of the driving waveform or can be an interruption of the normal driving waveform in response to suitable interrupt signals. In order to determine the zero crossing points of each back EMF signal, two (or more) samples of the back EMF are taken during the undriven period P and used to interpolate the back EMF signal to determine the zero crossing point.
摘要翻译： 在三相BLDC电动机中，通过检测相绕组U，V，W中的感应反EMF信号BEMF_U，BEMF_V，BEMF_W的过零点来监测转子位置。如图所示，反电动势信号基本上是正弦曲线 但是在其他情况下也可能是梯形的。 三个反电动势信号彼此相位相差120°。 为了精确地监视相绕组中的反电动势，每相U，V，W的驱动波形包括接近预期过零点的未驱动周期P. 周期P可以是驱动波形的预设部分，或者可以响应于合适的中断信号而中断正常的驱动波形。 为了确定每个反向EMF信号的过零点，反电动势的两个（或多个）采样在未驱动周期P期间被采集，并用于内插反电动势信号以确定过零点。
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公开(公告)号：US20090096397A1
公开(公告)日：2009-04-16
申请号：US12208206
申请日：2008-09-10
IPC分类号： H02P6/18
CPC分类号： H02P6/182 , H02P2209/07 , H02P2209/11
摘要： In a three phase BLDC motor the rotor position is monitored by detecting the zero crossing points of the induced back EMF signals BEMF_U, BEMF_V, BEMF_W in the phase windings U, V, W. As they are illustrated, the back EMF signals are substantially sinusoidal but they may in other situations be substantially trapezoidal. The three back EMF signals are 120° out of phase with each other. In order to accurately monitor the back EMF in a phase winding, the driving waveform for each phase U, V, W includes an undriven period P close to the expected zero crossing point. The period P can be a preset part of the driving waveform or can be an interruption of the normal driving waveform in response to suitable interrupt signals. In order to determine the zero crossing points of each back EMF signal, two (or more) samples of the back EMF are taken during the undriven period P and used to interpolate the back EMF signal to determine the zero crossing point.
摘要翻译： 在三相BLDC电动机中，通过检测相绕组U，V，W中的感应反EMF信号BEMF_U，BEMF_V，BEMF_W的过零点来监测转子位置。如图所示，反电动势信号基本上是正弦曲线 但是在其他情况下也可能是梯形的。 三个反电动势信号彼此相位相差120°。 为了精确地监视相绕组中的反电动势，每相U，V，W的驱动波形包括接近预期过零点的未驱动周期P. 周期P可以是驱动波形的预设部分，或者可以响应于合适的中断信号而中断正常的驱动波形。 为了确定每个反向EMF信号的过零点，反电动势的两个（或多个）采样在未驱动周期P期间被采集，并用于内插反电动势信号以确定过零点。
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公开(公告)号：US07944159B2
公开(公告)日：2011-05-17
申请号：US12148350
申请日：2008-04-18
申请人： Christian Paintz , Thomas Freitag , Detlef Klose
发明人： Christian Paintz , Thomas Freitag , Detlef Klose
IPC分类号： H02P6/00
摘要： In order to determine the orientation of the rotor of a brushless DC motor 100, a sequence of current pulses may be applied to the stator phases U, V, W by the respective drivers HS0, LS0, HS1, LS1, HS2, LS2. The current generated in the stator phases U, V, W in turn generates a current in a shunt resistor 110. The current in this shunt resistor 110 is monitored by use of a current voltage converter 120 and a comparator 130 to determine when it exceeds a predetermined threshold. The rise time until the threshold current is exceeded is recorded in capture unit 140. A processor unit 150 then calculates a scalar parameter SU, SV, SW for each respective stator phase U, V, W from the recorded rise times associated with each pulse. The orientation of the magnetic axis of the rotor can then be determined by consideration of the scalar parameters SU, SV, SW of each stator phase U, V, W, as the respective rise times of each pulse are determined by the inductive properties of the respective stator phases U, V, W, which in turn are dependent upon the orientation of the rotor.
摘要翻译： 为了确定无刷直流电动机100的转子的方向，可以通过相应的驱动器HS0，LS0，HS1，LS1，HS2，LS2将一系列电流脉冲施加到定子相位U，V，W。 在定子相位U，V，W中产生的电流又产生分流电阻器110中的电流。通过使用电流电压转换器120和比较器130来监视该分流电阻器110中的电流，以确定它何时超过 预定阈值。 直到超过阈值电流的上升时间被记录在捕获单元140中。然后，处理器单元150根据与每个脉冲相关联的记录的上升时间，为每个相应的定子相位U，V，W计算标量参数SU，SV，SW。 然后可以通过考虑每个定子相位U，V，W的标量参数SU，SV，SW来确定转子磁轴的取向，因为每个脉冲的相应上升时间由 相应的定子相U，V，W又依赖于转子的取向。
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公开(公告)号：US20090108783A1
公开(公告)日：2009-04-30
申请号：US12148350
申请日：2008-04-18
申请人： Christian Paintz , Thomas Freitag , Detlef Klose
发明人： Christian Paintz , Thomas Freitag , Detlef Klose
IPC分类号： H02P1/46
摘要： In order to determine the orientation of the rotor of a brushless DC motor 100, a sequence of current pulses may be applied to the stator phases U, V, W by the respective drivers HS0, LS0, HS1, LS1 HS2, LS2. The current generated in the stator phases U, V, W in turn generates a current in a shunt resistor 110. The current in this shunt resistor 110 is monitored by use of a current voltage converter 120 and a comparator 130 to determine when it exceeds a predetermined threshold. The rise time until the threshold current is exceeded is recorded in capture unit 140. A processor unit 150 then calculates a scalar parameter SU, SV, SW for each respective stator phase U, V, W from the recorded rise times associated with each pulse. The orientation of the magnetic axis of the rotor can then be determined by consideration of the scalar parameters SU, SV, SW of each stator phase U, V, W, as the respective rise times of each pulse are determined by the inductive properties of the respective stator phases U, V, W, which in turn are dependent upon the orientation of the rotor.
摘要翻译： 为了确定无刷直流电动机100的转子的方向，可以通过相应的驱动器HS0，LS0，HS1，LS1，HS2，LS2将一系列电流脉冲施加到定子相位U，V，W。 在定子相位U，V，W中产生的电流又产生分流电阻器110中的电流。通过使用电流电压转换器120和比较器130来监视该分流电阻器110中的电流，以确定它何时超过 预定阈值。 直到超过阈值电流的上升时间被记录在捕获单元140中。然后，处理器单元150根据与每个脉冲相关联的记录的上升时间，为每个相应的定子相位U，V，W计算标量参数SU，SV，SW。 然后可以通过考虑每个定子相位U，V，W的标量参数SU，SV，SW来确定转子磁轴的取向，因为每个脉冲的相应上升时间由 相应的定子相U，V，W又依赖于转子的取向。
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