公开(公告)号：US06380703B1

公开(公告)日：2002-04-30

申请号：US09681308

申请日：2001-03-15

申请人： Bertram J. White

发明人： Bertram J. White

IPC分类号： H02P118

CPC分类号： G11B19/28 ,  H02P6/08 ,  H02P6/14 ,  H02P23/186

摘要： A circuit for providing commutation control signals to a commutator for a polyphase brushless dc motor in a mass data storage device includes an accumulator (48) to accumulate a digital count that is proportional or related to a phase difference between the commutation control signals and a motor bemf. A digital variable frequency oscillator (52) generates an oscillator output signal of frequency proportional to the digital count to reset the accumulator (68) after a predetermined time determined by the frequency. The circuit may also include a digital filter (50) between the digital accumulator (48) and the digital variable frequency oscillator (52) to generate a magnitude signal (DRC) of magnitude proportional to the accumulated count for delivery to the variable frequency oscillator (52) to control the frequency thereof.

摘要翻译： 用于向大容量数据存储装置中的多相无刷直流电动机的换向器提供换向控制信号的电路包括累加器（48），用于累积与换向控制信号和电动机之间的相位差成比例或相关的数字计数 bemf。 数字可变频率振荡器（52）产生与数字计数成比例的频率的振荡器输出信号，以在由频率确定的预定时间之后复位累加器（68）。 电路还可以包括在数字累加器（48）和数字可变频率振荡器（52）之间的数字滤波器（50），以产生与用于传送到可变频率振荡器的累积计数成比例的幅度信号（DRC） 52）来控制其频率。

公开(公告)号：US06252362B1

公开(公告)日：2001-06-26

申请号：US09448571

申请日：1999-11-23

申请人： Bertram J. White ,  Michael Arkin ,  Vincent Ng

发明人： Bertram J. White ,  Michael Arkin ,  Vincent Ng

IPC分类号： H02K2300

CPC分类号： H02P6/10 ,  Y10S388/911

摘要： A method and circuit for operating a polyphase dc motor in which discontinuous sinusoidal drive voltages are applied to the windings of the motor in predetermined phases. The discontinuous portion of the sinusoid is timed with the bemf zero crossings. Bemf zero crossings are detected, and phases of the drive voltages are adjusted to have zero crossings substantially in the discontinuities of the drive voltages. The method and circuit result in motor operation with significantly reduced acoustic motor noise.

摘要翻译： 一种用于操作多相直流电动机的方法和电路，其中不连续的正弦驱动电压以预定阶段施加到电动机的绕组。 正弦曲线的不连续部分与bemf零交叉定时。 检测到Bemf过零点，并且驱动电压的相位被调整为在驱动电压的不连续性中基本上具有零交叉。 该方法和电路导致电机运行，显着降低了声电机噪声。

公开(公告)号：US06483377B2

公开(公告)日：2002-11-19

申请号：US09758961

申请日：2001-01-10

申请人： Bertram J. White ,  Ying Zhang McCleary

发明人： Bertram J. White ,  Ying Zhang McCleary

IPC分类号： G05F110

CPC分类号： H02M3/07 ,  H02M2001/0029

摘要： The present invention includes a charge pump circuit to raise a voltage including a voltage source to generate the voltage to be raised, a pair of switches to switch the voltage to a capacitor with the first pair of switches operating during different periods of time and a second pair of switches to switch additional voltage to the capacitor with the second pair of switches operating during different periods of time.

公开(公告)号：US5319289A

公开(公告)日：1994-06-07

申请号：US840440

申请日：1992-02-24

申请人： Charles C. Austin ,  Bertram J. White

发明人： Charles C. Austin ,  Bertram J. White

IPC分类号： H02P6/16 ,  H02P6/14 ,  H02P6/02

CPC分类号： H02P6/15

摘要： A circuit to provide adaptive commutation delay for multi-pole brushless DC motors. The circuit adjusts the commutation delay as a function of the rotational speed of the motor to maximize motor torque and minimize power consumption. Unlike the prior art, the circuit avoids the need for complex circuitry or external components. The circuit may be implemented entirely within a single integrated circuit. The circuit includes a back-EMF sensing input, an oscillator, a voltage holding and proportioning circuit, one or more comparators and, optionally, an external control circuit. The back-EMF sensing input controls the operation of the oscillator. The voltage holding and proportioning circuit processes the oscillator output and provides outputs which are compared by the comparators. The comparators produce commutation delay signals and, optionally, other signals. The circuit also allows adjustment to compensate for non-ideal back-EMF-to-rotor-position correspondence or fixed time delays inherent in the commutation process.

摘要翻译： 为多极无刷直流电机提供自适应换向延迟的电路。 该电路根据电动机的转速调节换向延迟，以最大限度地提高电机转矩并最大限度地降低功耗。 与现有技术不同，该电路避免了对复杂电路或外部组件的需要。 该电路可以完全在单个集成电路内实现。 电路包括反电动势检测输入，振荡器，电压保持和配比电路，一个或多个比较器和可选的外部控制电路。 反电动势检测输入控制振荡器的工作。 电压保持和配比电路处理振荡器输出并提供由比较器比较的输出。 比较器产生换向延迟信号和可选的其它信号。 该电路还允许调整以补偿非理想的反电动势到转子位置对应或在换向过程中固有的固定时间延迟。

公开(公告)号：US06538304B1

公开(公告)日：2003-03-25

申请号：US09715383

申请日：2000-11-16

申请人： Bertram J. White

发明人： Bertram J. White

IPC分类号： H01L2348

CPC分类号： H01L23/50 ,  H01L23/495 ,  H01L23/49541 ,  H01L23/5286 ,  H01L23/60 ,  H01L24/48 ,  H01L24/49 ,  H01L2224/05554 ,  H01L2224/48247 ,  H01L2224/48257 ,  H01L2224/49171 ,  H01L2924/00014 ,  H01L2924/01014 ,  H01L2924/14 ,  H01L2924/1433 ,  H01L2924/00 ,  H01L2224/45099 ,  H01L2224/05599

摘要： A lead frame for an integrated circuit includes a ground for the integrated circuit to ground the integrated circuit, the lead frame having at least one corner connected to the ground; and a connector between the corner of the lead frame and the ground located on the integrated circuit.

摘要翻译： 用于集成电路的引线框架包括用于集成电路接地集成电路的接地，引线框架具有至少一个角部连接到地面; 以及在引线框架的角部和位于集成电路上的接地之间的连接器。

公开(公告)号：US06236174B1

公开(公告)日：2001-05-22

申请号：US09300754

申请日：1999-04-26

申请人： Bertram J. White

发明人： Bertram J. White

IPC分类号： H02K2300

CPC分类号： H02P6/182 ,  H02P6/08

摘要： A method and circuit are presented for operating a polyphase dc motor in which substantially sinusoidal drive voltages are applied to the windings of the motor in predetermined phases. Zero crossings of currents flowing in respective windings of the motor are detected, and phases of the drive voltages are adjusted to have zero crossings substantially simultaneously with the detected zero crossings of the currents flowing in respective windings of the motor. The method and circuit results in motor operation with significantly reduced acoustic motor noise.

摘要翻译： 提出了一种用于操作多相直流电动机的方法和电路，其中基本上正弦的驱动电​​压以预定的相位施加到电动机的绕组。 检测在电动机的各个绕组中流动的电流的零交叉，并且驱动电压的相位被调整为与检测到的在电动机的各个绕组中流动的电流的过零点同时具有过零点。 该方法和电路导致电机运行，显着降低了声电机噪声。

公开(公告)号：US06998799B2

公开(公告)日：2006-02-14

申请号：US10260978

申请日：2002-09-30

申请人： John K. Rote ,  Tanchu Shih ,  Bertram J. White

发明人： John K. Rote ,  Tanchu Shih ,  Bertram J. White

IPC分类号： H02K23/00

CPC分类号： H02P6/10 ,  H02P6/14

摘要： A system and method of motor control enable improved motor control by controlling a phase winding to float or enter a high impedance state prior to activating phase detection of the phase winding. Because the phase winding floats prior to phase detection, the effect residual current coupling in such phase can be mitigated and thereby help improve motor operation.

摘要翻译： 电动机控制的系统和方法通过在激励相绕组的相位检测之前控制相绕组浮动或进入高阻抗状态来改善电机控制。 由于在相位检测之前相绕组浮动，所以可以减轻在这种相位下的剩余电流耦合效应，从而有助于改善电机运行。

公开(公告)号：US06819072B2

公开(公告)日：2004-11-16

申请号：US09817695

申请日：2001-03-26

申请人： Bertram J. White ,  Kevin W. Ziemer

发明人： Bertram J. White ,  Kevin W. Ziemer

IPC分类号： G05B1101

CPC分类号： G11B21/12 ,  G11B19/22

摘要： A spindle motor control circuit for controlling a motor; including a control circuit to control the motor during at least a low state, a pulse state and a high state, the motor braking during said low state, the control circuit receiving a flyback voltage from the motor during the pulse state and the control circuit receiving a reduced flyback voltage from the motor during the high state.

摘要翻译： 一种用于控制电动机的主轴电动机控制电路; 包括在至少低状态，脉冲状态和高状态期间控制电动机的控制电路，在所述低状态期间电动机制动，控制电路在脉冲状态期间接收来自电动机的回扫电压，并且控制电路接收 在高电平期间来自电动机的反激电压降低。

公开(公告)号：US06441681B1

公开(公告)日：2002-08-27

申请号：US09876449

申请日：2001-06-07

申请人： Bertram J. White ,  Tanchu Shih

发明人： Bertram J. White ,  Tanchu Shih

IPC分类号： G05F302

CPC分类号： G11B21/12

摘要： The present invention includes a circuit to maintain a constant voltage on a storage element such as a capacitor at the output of a regulator during an emergency power condition. It includes a detector to detect the emergency condition and to generate a fault signal in response to the emergency condition, a one-shot time delay circuit to delay the enabling of a regulator in response to the fault signal, and a second delay unit to delay the enabling of the load of a regulator to accommodate the non-zero recovery time of a regulator. These two time delay units are able to bypass the noisy switching on the fault signal so that the maintained voltage on the storage capacitor will not droop and can be reliably used for such purposes as head retract and spindle brake under a noisy power emergency situation.

摘要翻译： 本发明包括在紧急电力状态期间在调节器的输出处保持诸如电容器的存储元件上的恒定电压的电路。 它包括检测器，用于检测紧急情况并响应于紧急情况产生故障信号;一个单触发时延延迟电路，用于响应于故障信号延迟调节器的使能;以及第二延迟单元，用于延迟 调节器的负载能够调节调节器的非零恢复时间。 这两个延时单元能够绕过故障信号的噪声开关，使得存储电容器上保持的电压不会下降，并且可以可靠地用于在噪声电源紧急情况下的头部回缩和主轴制动。