公开(公告)号：US07205744B1

公开(公告)日：2007-04-17

申请号：US11482560

申请日：2006-07-07

Applicant: Foo Leng Leong ,  Cheng Yong Teoh ,  Siew Yong Chui

Inventor： Foo Leng Leong ,  Cheng Yong Teoh ,  Siew Yong Chui

IPC: G05B23/02

CPC classification number: H02P6/182

Abstract: In a method for measuring motor speed and position by detecting the back EMF generated during pole-pair interactions, a separate respective duration of a power phase suppression signal, that is set during back EMF detection, is stored in memory for each respective pole. The separate respective duration values are determined during a calibration phase by iteratively lengthening each respective duration one unit at a time (up to a maximum value) until no part of the respective back EMF signal occurs outside the suppression signal duration, and those values are stored. During operation, the approach of a pole-pair interaction may be determined from the electrical cycle of the power supply, and then the stored duration value is used to control the state of the suppression signal.

Abstract translation: 在用于通过检测在极对相互作用期间产生的反电动势来测量电动机速度和位置的方法中，在反电动势检测期间设置的功率相位抑制信号的单独的相应持续时间被存储在每个相应极的存储器中。 在校准阶段期间通过每次相应地延长一个单位一个单位（最多达到最大值），直到相应的反EMF信号的部分不在抑制信号持续时间之外发生，并且这些值被存储 。 在运行期间，可以从电源的电周期确定极对相互作用的方法，然后使用存储的持续时间值来控制抑制信号的状态。

公开(公告)号：US08742735B2

公开(公告)日：2014-06-03

申请号：US13449407

申请日：2012-04-18

Applicant: Ravishanker Krishnamoorthy ,  Radu Pitigoi-Aron ,  Siew Yong Chui

Inventor： Ravishanker Krishnamoorthy ,  Radu Pitigoi-Aron ,  Siew Yong Chui

IPC: G05F1/10

CPC classification number: H02M7/217 ,  H02M2001/0006

Abstract: A system including a power transistor configured to receive an alternating current (AC) line voltage and a control circuit. During a rising portion of a half cycle of the AC line voltage, the control circuit is configured to turn on the power transistor when the AC line voltage reaches a first value and turn off the power transistor when the AC line voltage reaches a second value. The second value is greater than the first value. During a falling portion of the half cycle, the control circuit is configured to turn on the power transistor when the AC line voltage reaches the second value and turn off the power transistor when the AC line voltage reaches the first value.

Abstract translation: 一种包括被配置为接收交流（AC）线路电压的功率晶体管和控制电路的系统。 在AC线电压的半周期的上升部分期间，控制电路被配置为当AC线电压达到第一值时接通功率晶体管，并且当AC线电压达到第二值时关闭功率晶体管。 第二个值大于第一个值。 在半周期的下降部分期间，控制电路被配置为当AC线电压达到第二值时接通功率晶体管，并且当AC线电压达到第一值时关闭功率晶体管。

公开(公告)号：US20120294051A1

公开(公告)日：2012-11-22

申请号：US13449407

申请日：2012-04-18

Applicant: Ravishanker Krishnamoorthy ,  Radu Pitigoi-Aron ,  Siew Yong Chui

Inventor： Ravishanker Krishnamoorthy ,  Radu Pitigoi-Aron ,  Siew Yong Chui

IPC: H02M7/06

CPC classification number: H02M7/217 ,  H02M2001/0006

Abstract: A system including a power transistor configured to receive an alternating current (AC) line voltage and a control circuit. During a rising portion of a half cycle of the AC line voltage, the control circuit is configured to turn on the power transistor when the AC line voltage reaches a first value and turn off the power transistor when the AC line voltage reaches a second value. The second value is greater than the first value. During a falling portion of the half cycle, the control circuit is configured to turn on the power transistor when the AC line voltage reaches the second value and turn off the power transistor when the AC line voltage reaches the first value.

Abstract translation: 一种包括被配置为接收交流（AC）线路电压的功率晶体管和控制电路的系统。 在AC线电压的半周期的上升部分期间，控制电路被配置为当AC线电压达到第一值时接通功率晶体管，并且当AC线电压达到第二值时关闭功率晶体管。 第二个值大于第一个值。 在半周期的下降部分期间，控制电路被配置为当AC线电压达到第二值时接通功率晶体管，并且当AC线电压达到第一值时关闭功率晶体管。

公开(公告)号：US08144420B1

公开(公告)日：2012-03-27

申请号：US12916052

申请日：2010-10-29

Applicant: Ying Tian Li ,  Siew Yong Chui ,  Cheng Yong Teoh

Inventor： Ying Tian Li ,  Siew Yong Chui ,  Cheng Yong Teoh

IPC: G11B21/02 ,  G11B15/18

CPC classification number: G11B19/02 ,  G06F1/32

Abstract: The power required by a voice coil motor (VCM) to maintain the head in the data region of a disk drive during an idle mode is further reduced. The current supplied to the VCM is switched on and off. This takes advantage of the inherent capacitance and inductance in the VCM, which maintains a current after the current supply is switched off. The current will slowly decay, with it being switched on again before it reaches a level where the average value won't offset the flex bias. In one embodiment, the current is maintained in a single direction, to offset the flex bias which pushes in one direction. Digital switches are used to reduce the power consumption of the control circuitry.

Abstract translation: 音圈电机（VCM）在空闲模式期间将磁头保持在磁盘驱动器的数据区域所需的功率进一步降低。 提供给VCM的电流打开和关闭。 这充分利用了VCM中的固有电容和电感，该电容在电流关断后保持电流。 电流将慢慢衰减，在其达到平均值不会抵消挠曲偏差的水平之前再次接通。 在一个实施例中，电流保持在单个方向上，以抵消在一个方向上推动的柔性偏压。 数字开关用于降低控制电路的功耗。

公开(公告)号：US07729141B1

公开(公告)日：2010-06-01

申请号：US12335597

申请日：2008-12-16

Applicant: Siew Yong Chui ,  Jye Sheng Hong

Inventor： Siew Yong Chui ,  Jye Sheng Hong

IPC: H02M3/18

CPC classification number: H02M3/07

Abstract: A voltage tripler circuit includes a plurality of switches and first, second, and third capacitors each having first and second terminals that are selectively interconnected via the plurality of switches. The first capacitor charges to a supply voltage during a first phase. The second capacitor charges to two times the supply voltage during a second phase that follows the first phase. The third capacitor charges to three times the supply voltage during a third phase that follows the second phase. The voltage tripler circuit draws the same peak current from a source of the supply voltage at a beginning of each of the first, second, third phases.

Abstract translation: 电压三重电路包括多个开关和第一，第二和第三电容器，每个电容器具有经由多个开关选择性地互连的第一和第二端子。 在第一阶段期间，第一电容器充电到电源电压。 在第一阶段之后的第二阶段，第二个电容充电到电源电压的两倍。 在第二阶段之后的第三阶段，第三个电容器充电到电源电压的三倍。 电压三重电路在第一，第二和第三相中的每一个的开始处从电源电压源中获得相同的峰值电流。

公开(公告)号：US07623316B1

公开(公告)日：2009-11-24

申请号：US12287899

申请日：2008-10-13

Applicant: Sakti Rana ,  Yayue Zhang ,  Siew Yong Chui

Inventor： Sakti Rana ,  Yayue Zhang ,  Siew Yong Chui

IPC: G11B21/02

CPC classification number: H02M3/07 ,  G11B21/12 ,  H02M1/36

Abstract: A charging system includes a current source, a voltage pump, and a comparator that compares a charging level of a capacitor to each of a first threshold and a second threshold. A controller turns on the voltage pump and turns off the current source after the charging level exceeds the first threshold, and turns off the voltage pump and turns on the current source when the charging level falls below the second threshold. The first threshold is greater than the second threshold.

Abstract translation: 充电系统包括电流源，电压泵和将电容器的充电电平与第一阈值和第二阈值中的每一个进行比较的比较器。 控制器打开电压泵，并在充电电平超过第一阈值后关闭电流源，并在充电电平低于第二阈值时关闭电压泵并接通电流源。 第一阈值大于第二阈值。

公开(公告)号：US07504789B1

公开(公告)日：2009-03-17

申请号：US12107698

申请日：2008-04-22

Applicant: Siew Yong Chui ,  Foo Leng Leong

Inventor： Siew Yong Chui ,  Foo Leng Leong

IPC: H02K23/00

CPC classification number: H02P6/182 ,  G11B19/28 ,  H02P2209/07

Abstract: In a method for measuring motor speed and position by detecting the back-EMF generated during pole-pair interactions, fluctuations of a three-phase motor power supply that may affect back-EMF detection are reduced. One phase of the power supply is tristated for a certain interval preceding and during back-EMF detection. For a shorter interval during back-EMF detection, the voltage drop across the motor is reduced from the full power supply voltage. This preferably is accomplished either by pulling a first of the other two power supply phases low, while pulling a second of the other two power supply phases up to a regulated voltage below the power supply voltage, or by pulling the second of the other two phases up to the power supply voltage and pulling the first of the other two phases down to a regulated voltage above ground.

Abstract translation: 在通过检测在极对相互作用期间产生的反电动势来测量电动机速度和位置的方法中，减小了可能影响反电动势检测的三相电动机电源的波动。 电源的一个阶段在反电动势检测之前和期间都保持一定的间隔。 对于反电动势检测期间较短的间隔，电机两端的电压降从全电源电压降低。 这优选地通过将另外两个电源相位中的第一相位拉低，同时将另外两个电源相位中的第二个拉至低于电源电压的调节电压，或者通过拉动另外两个相位中的第二相 直到电源电压并将另外两个相位的第一个相位降低到地面以上的稳压电压。

公开(公告)号：US07466572B1

公开(公告)日：2008-12-16

申请号：US11585566

申请日：2006-10-24

Applicant: Siew Yong Chui ,  Jye Sheng Hong

Inventor： Siew Yong Chui ,  Jye Sheng Hong

IPC: H02M3/18

CPC classification number: H02M3/07

Abstract: A three-phase voltage tripler includes first, second, and third capacitive elements and a switching module. The switching module selectively switches connections among the capacitive elements and between the capacitive elements and a reference voltage during first, second, and third periods. The switching module charges the first capacitive element to a first voltage level during the first period, the second capacitive element to a second voltage level during the second period, and the third capacitive element to a third voltage level during the third period. The third voltage level is greater than the second voltage level and the second voltage level is greater than the first voltage level.

Abstract translation: 三相三线电压器包括第一，第二和第三电容元件和开关模块。 开关模块在第一，第二和第三周期期间选择性地切换电容元件之间以及电容元件之间的连接和参考电压。 开关模块在第一周期期间将第一电容元件充电至第一电压电平，在第二周期期间将第二电容元件充电至第二电压电平，并将第三电容元件充电至第三电压电平。 第三电压电平大于第二电压电平，第二电压电平大于第一电压电平。

公开(公告)号：US07365510B1

公开(公告)日：2008-04-29

申请号：US11690513

申请日：2007-03-23

Applicant: Foo Leng Leong ,  Chen Yong Teoh ,  Siew Yong Chui

Inventor： Foo Leng Leong ,  Chen Yong Teoh ,  Siew Yong Chui

IPC: G05B23/02

CPC classification number: H02P6/182 ,  G11B19/28

Abstract: In a method for measuring motor speed and position by detecting the back EMF generated during pole-pair interactions, a separate respective duration of a power phase suppression signal, that is set during back EMF detection, is stored in memory for each respective pole. The separate respective duration values are determined during a calibration phase by iteratively lengthening each respective duration one unit at a time (up to a maximum value) until no part of the respective back EMF signal occurs outside the suppression signal duration, and those values are stored. During operation, the approach of a pole-pair interaction may be determined from the electrical cycle of the power supply, and then the stored duration value is used to control the state of the suppression signal.

Abstract translation: 在用于通过检测在极对相互作用期间产生的反电动势来测量电动机速度和位置的方法中，在反电动势检测期间设置的功率相位抑制信号的单独的相应持续时间被存储在每个相应极的存储器中。 在校准阶段期间通过每次相应地延长一个单位一个单位（最多达到最大值），直到相应的反EMF信号的部分不在抑制信号持续时间之外发生，并且这些值被存储 。 在运行期间，可以从电源的电周期确定极对相互作用的方法，然后使用存储的持续时间值来控制抑制信号的状态。

公开(公告)号：US07098621B1

公开(公告)日：2006-08-29

申请号：US11104683

申请日：2005-04-12

Applicant: Foo Leng Leong ,  Cheng Yong Teoh ,  Siew Yong Chui

Inventor： Foo Leng Leong ,  Cheng Yong Teoh ,  Siew Yong Chui

IPC: G05B23/02

CPC classification number: H02P6/182

Abstract: In a method for measuring motor speed and position by detecting the back EMF generated during pole-pair interactions, a separate respective duration of a power phase suppression signal, that is set during back EMF detection, is stored in memory for each respective pole. The separate respective duration values are determined during a calibration phase by iteratively lengthening each respective duration one unit at a time (up to a maximum value) until no part of the respective back EMF signal occurs outside the suppression signal duration, and those values are stored. During operation, the approach of a pole-pair interaction may be determined from the electrical cycle of the power supply, and then the stored duration value is used to control the state of the suppression signal.

Abstract translation: 在用于通过检测在极对相互作用期间产生的反电动势来测量电动机速度和位置的方法中，在反电动势检测期间设置的功率相位抑制信号的单独的相应持续时间被存储在每个相应极的存储器中。 在校准阶段期间通过每次相应地延长一个单位一个单位（最多达到最大值），直到相应的反EMF信号的部分不在抑制信号持续时间之外发生，并且这些值被存储 。 在运行期间，可以从电源的电周期确定极对相互作用的方法，然后使用存储的持续时间值来控制抑制信号的状态。