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1. 发明授权

US4574225A Apparatus for accommodating inductive flyback in pulsed motor windings 失效
标题翻译：用于在脉冲电机绕组中容纳感应反激的装置
公开(公告)号：US4574225A
公开(公告)日：1986-03-04
申请号：US637850
申请日：1984-08-06
申请人： Arthur A. Pershall , George H. Holling
发明人： Arthur A. Pershall , George H. Holling
IPC分类号： H02P6/12 , H02P6/02
CPC分类号： H02P6/12
摘要： Control circuits for operating electric motors of the class having windings pulsed in sequence and a magnetic field, the class being exemplified by brushless d.c. motors. Improved apparatus is provided for accommodating flyback action when excitation current through any one of the windings is interrupted by the opening of a switch device (e.g., on-off controlled transistor), whether that device be a sequence power switch or a main switch having a common series relation to all of the power switches and operated with an adjustable duty cycle so as to permit adjustment of motor speed and torque. The flyback apparatus, as here disclosed, provides low loss flyback current paths so as to return inductively stored energy back into the winding when its excitation is interrupted, thereby to enhance motor efficiency while eliminating high open circuit voltages across the switching devices. Negative torque which might be created in the flyback circuits as a result of back e.m.f. in a winding is precluded by threshold circuit elements or by timed control of the conductive and non-conductive states of the flyback current paths.
摘要翻译：用于操作具有顺序脉冲的绕组的电动机的电动机和磁场的控制电路，该类别由无刷直流电机。提供了改进的装置，用于当通过任何一个绕组的激励电流被开关装置（例如开关控制晶体管）的打开中断时，用于适应回扫动作，无论该装置是顺序功率开关还是具有与所有电源开关的通用串联关系，并以可调整的占空比运行，以允许调整电机转速和转矩。如本文所公开的那样，回扫装置提供低损耗回扫电流路径，以便当其激励被中断时将感应存储的能量返回到绕组中，从而提高电动机效率，同时消除开关装置两端的高开路电压。由于返回e.m.f.可能在反激电路中产生的负转矩。在绕组中由阈值电路元件排除或者通过定时控制反激电流路径的导电和非导通状态。

2. 发明授权

US06777844B2 Brushless motor 有权
标题翻译：无刷电机
公开(公告)号：US06777844B2
公开(公告)日：2004-08-17
申请号：US10012844
申请日：2001-10-24
申请人： Steven Selewski , Mark Howie , George H. Holling
发明人： Steven Selewski , Mark Howie , George H. Holling
IPC分类号： H02K100
CPC分类号： H02K19/103 , A47L9/188 , A47L9/2805 , A47L9/2842 , A47L9/2889 , H02K1/246 , H02K7/14
摘要： A vacuum cleaner assembly includes a motor having a rotor and a stator for providing motive power to the assembly. The rotor and stator each include armatures having tips. In one aspect, the widths of the rotor and stator tips are different. In another aspect, the rotor armatures have a non-constant width. Another aspect discloses the motor being a two-phase brushless motor having an even number (N) of stator armatures and N+2 rotor armatures. In another aspect, a rotor armature includes an aperture. In another aspect, each rotor armature includes a plurality of layers laminated together, with one layer being dimensionally different than the other layers. In another embodiment of the present invention, a control circuit energizes the windings of the stator so as to toggle the rotor in a first direction before alternately energizing the windings to drive the rotor in a second direction.
摘要翻译：真空吸尘器组件包括具有转子和定子的电动机，用于向组件提供动力。转子和定子各自包括具有尖端的电枢。在一个方面，转子和定子尖端的宽度是不同的。在另一方面，转子电枢具有不恒定的宽度。另一方面公开了电动机是具有偶数（N）个定子电枢和N + 2个转子电枢的两相无刷电动机。另一方面，转子电枢包括孔。另一方面，每个转子电枢包括层叠在一起的多个层，其中一层的尺寸与其它层的尺寸不同。在本发明的另一个实施例中，控制电路使定子的绕组通电，以便在交替地激励绕组之前在第一方向上转动转子，以沿第二方向驱动转子。

3. 发明授权

US5990643A Sensorless commutation position detection for brushless D.C. motors 失效
标题翻译：无刷直流电机的无传感器换向位置检测
公开(公告)号：US5990643A
公开(公告)日：1999-11-23
申请号：US122026
申请日：1998-07-24
申请人： George H. Holling , Mark Yeck , Michael Schmitt
发明人： George H. Holling , Mark Yeck , Michael Schmitt
IPC分类号： H02P6/18 , H02P6/14 , H02P5/28
CPC分类号： H02P6/182
摘要： A rotor position determination system for a polyphase D.C. brushless motor utilizing the back electromotive force (B.E.M.F.) voltage of the open or "off" phase of the motor as a critical signal for controlling the commutation of the motor, the system further including means for phase advance of the energization of the motor.
摘要翻译：一种用于多相DC无刷电动机的转子位置确定系统，其利用电动机的打开或“关闭”相的反电动势（BEMF）电压作为用于控制电动机换向的关键信号，该系统还包括用于相位推进电机的通电。

4. 发明授权

US5995710A Speed control for brushless DC motors 失效
标题翻译：无刷直流电机的速度控制
公开(公告)号：US5995710A
公开(公告)日：1999-11-30
申请号：US122497
申请日：1998-07-24
申请人： George H. Holling , Mark Yeck , Michael Schmitt
发明人： George H. Holling , Mark Yeck , Michael Schmitt
IPC分类号： H02P6/06 , H02P6/14 , H02P5/178
CPC分类号： H02P6/06 , H02P6/15
摘要： An apparatus for controlling the speed of rotation of the rotor of a brushless DC motor wherein means are provided for shifting both the on and off angle of motor excitation in opposite senses to thereby widen or narrow the pulse of energization to motor winding(s).
摘要翻译：一种用于控制无刷直流电动机的转子的转速的装置，其中提供了用于以相反的方向移动电动机励磁的接通和断开角度的装置，从而使电动机绕组的通电脉冲变宽或变窄。

5. 发明授权

US5600218A Sensorless commutation position detection for brushless motors 失效
标题翻译：无刷电机无传感器换向位置检测
公开(公告)号：US5600218A
公开(公告)日：1997-02-04
申请号：US526525
申请日：1995-09-11
申请人： George H. Holling , Mark M. Yeck , Anthony J. Brewer
发明人： George H. Holling , Mark M. Yeck , Anthony J. Brewer
IPC分类号： H02P6/00 , H02P6/18 , H02P6/20 , H02P6/02
CPC分类号： H02P6/20 , H02P6/18 , H02P6/185 , H02P6/34
摘要： A method and apparatus for the sensorless determination of commutation position in a brushless motor. The electric current flowing within the active, or energized, stator coil during energization is differentiated to produce a current rate of change waveform. The current rate of change waveform is compared to a predetermined voltage threshold which is set to approximate the point at which the rotor is in direct positional alignment with the active stator. From this comparison, it is determined when the current rate of change waveform fails to intersect the predetermined voltage threshold. This information may be used to commutate the application of a driving signal to the next stator coil in succession to maintain continuous torque on the rotor. This information may also be indicative of a stalled condition, in which case a stall indicator is triggered to alert the user of the stalled condition.
摘要翻译：一种用于在无刷电动机中无传感器确定换向位置的方法和装置。在通电期间在有源或通电的定子线圈内流动的电流被微分，以产生电流变化率波形。将当前的变化率波形与预定电压阈值进行比较，该预定电压阈值被设置为接近转子与有源定子直接位置对准的点。从该比较中，确定当前变化率波形何时不能与预定电压阈值相交。该信息可以用于将驱动信号的应用连续地转换到下一个定子线圈，以保持转子上的连续转矩。该信息也可以表示停滞状态，在这种情况下，触发失速指示器以警告用户失速状态。

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