公开(公告)号：US06577086B2

公开(公告)日：2003-06-10

申请号：US09811935

申请日：2001-03-19

申请人： Tomy Sebastian

发明人： Tomy Sebastian

IPC分类号： H02K2300

CPC分类号： B62D5/046 ,  H02P6/34 ,  Y10S388/903

摘要： A circuit for disconnecting a neutral point of an electric machine includes an inductance connected to a lead of the electric machine; a three-terminal solid-state switch that has a first terminal connected to the inductance, a second terminal connected to the neutral point, and a third terminal for controlling a flow of current between the first and second terminals; a controlling circuit coupled to the three-terminal solid-state switch that includes a first loop that has a power source, a resistance, and a voltage regulator to maintain a first voltage upon the third terminal, and a second loop that has a power source, a resistance, and a trigger switch being controllably switched on to thereby close the first loop whereby a second voltage is applied to the three-terminal solid-state switch to thereby substantially electrically disconnect the first terminal from the second terminal.

公开(公告)号：US5410229A

公开(公告)日：1995-04-25

申请号：US203504

申请日：1994-02-28

申请人： Tomy Sebastian ,  Frank F. Athari

发明人： Tomy Sebastian ,  Frank F. Athari

IPC分类号： H02P3/08 ,  H02P7/29

CPC分类号： H02P3/08 ,  H02P7/29 ,  Y10S388/903 ,  Y10S388/93

摘要： The pulse width modulated DC motor speed control circuit indirectly senses motor current using sense MOSFETs and a peak detector circuit with storage capacitor for deriving an average motor current signal. The average motor current signal is used both in the feedback loop of the pulse width modulated speed control circuit and also in the motor shutoff or clutch circuit. The clutch circuit shuts off power to the motor when a user-settable torque is reached. The motor speed control circuit is therefore adapted for use in hand-held DC power tools such as screwdrivers and nutdrivers which stop rotation at a predefined torque.

摘要翻译： 脉冲宽度调制的直流电动机速度控制电路使用感测MOSFET间接感测电动机电流，并使用具有存储电容器的峰值检测器电路来获得平均电动机电流信号。 平均电机电流信号用于脉宽调制速度控制电路的反馈环路，也用于电机关断或离合器电路。 当达到用户可设定的扭矩时，离合器电路关闭电机的电源。 因此，电动机速度控制电路适用于手持式直流电动工具，例如以预定转矩停止转动的螺丝刀和螺母起子。

公开(公告)号：US09461574B2

公开(公告)日：2016-10-04

申请号：US13795261

申请日：2013-03-12

申请人： Abraham Gebregergis ,  Ramakrishnan RajaVenkitasubramony ,  Tomy Sebastian ,  Siddharth Ballal

发明人： Abraham Gebregergis ,  Ramakrishnan RajaVenkitasubramony ,  Tomy Sebastian ,  Siddharth Ballal

IPC分类号： H02P21/00

CPC分类号： H02P21/22

摘要： A motor control system for determining a reference d-axis current and a reference q-axis current is provided. The motor control system includes a motor, a DC power source and DC input lines, and a current command controller. The DC power source generates a bridge voltage across the DC input lines. The current command controller is configured to monitor the bridge voltage and a torque reference command. The current command controller is configured to calculate the reference q-axis current based on a torque reference command. The current command controller is configured to calculate the reference d-axis current based on a magnitude of the reference q-axis current.

摘要翻译： 提供了用于确定参考d轴电流和参考q轴电流的电动机控制系统。 电动机控制系统包括电动机，直流电源和直流输入线以及电流指令控制器。 直流电源通过直流输入线产生桥电压。 电流指令控制器被配置为监视桥电压和转矩参考指令。 电流指令控制器被配置为基于转矩参考指令来计算参考q轴电流。 电流指令控制器被配置为基于参考q轴电流的大小来计算参考d轴电流。

公开(公告)号：US09263982B2

公开(公告)日：2016-02-16

申请号：US13833354

申请日：2013-03-15

申请人： Abraham G. Gebregergis ,  Ramakrishnan RajaVenkitasubramony ,  Tomy Sebastian ,  Santhosh J. Veigas ,  Vaughn E. Lietzke

发明人： Abraham G. Gebregergis ,  Ramakrishnan RajaVenkitasubramony ,  Tomy Sebastian ,  Santhosh J. Veigas ,  Vaughn E. Lietzke

IPC分类号： H02P6/00 ,  H02P23/00 ,  H02P21/00

CPC分类号： H02P23/00 ,  H02P21/22 ,  H02P23/0027 ,  H02P27/08

摘要： A motor control system is provided, and includes a motor, at least one differential amplifier configured to monitor phase current applied to the motor, and a current compensation controller. The current compensation controller is in communication with the at least one differential amplifier, and is configured to periodically determine a common-mode voltage of the at least one differential amplifier. The current compensation controller is also configured to determine a corrected phase current value based on the common mode voltage.

摘要翻译： 提供一种电动机控制系统，并且包括电动机，至少一个差分放大器，被配置为监测施加到电动机的相电流和电流补偿控制器。 电流补偿控制器与至少一个差分放大器通信，并被配置为周期性地确定至少一个差分放大器的共模电压。 电流补偿控制器还被配置为基于共模电压来确定校正的相电流值。

公开(公告)号：US20140265962A1

公开(公告)日：2014-09-18

申请号：US13804873

申请日：2013-03-14

申请人： Abraham Gebregergis ,  Ramakrishnan RajaVenkitasubramony ,  Tomy Sebastian ,  Niharika P. Popy

发明人： Abraham Gebregergis ,  Ramakrishnan RajaVenkitasubramony ,  Tomy Sebastian ,  Niharika P. Popy

IPC分类号： H02P31/00

CPC分类号： H02P31/00 ,  B62D5/046 ,  H02P6/10 ,  H02P21/05 ,  H02P21/22 ,  H02P29/50

摘要： A motor control system for determining a ripple compensating current is provided. The motor control system includes a motor having a plurality of motor harmonics and a motor frequency, and a bandwidth compensation controller that is in communication with the motor. The bandwidth compensation controller is configured to determine a magnitude response compensation value and a phase compensation value for each of the plurality of motor harmonics. The magnitude response compensation value and the phase compensation value are both based on the motor frequency. The bandwidth compensation controller is configured to determine the ripple compensating current based on the magnitude response compensation value and the phase compensation value.

摘要翻译： 提供了一种用于确定纹波补偿电流的电动机控制系统。 电动机控制系统包括具有多个电动机谐波和电动机频率的电动机以及与电动机连通的带宽补偿控制器。 带宽补偿控制器被配置为确定多个电动机谐波中的每一个的幅度响应补偿值和相位补偿值。 幅度响应补偿值和相位补偿值均基于电机频率。 带宽补偿控制器被配置为基于幅度响应补偿值和相位补偿值来确定纹波补偿电流。

公开(公告)号：US20060087316A1

公开(公告)日：2006-04-27

申请号：US10971440

申请日：2004-10-22

申请人： Mohammad Islam ,  Matthew Mielke ,  Tomy Sebastian

发明人： Mohammad Islam ,  Matthew Mielke ,  Tomy Sebastian

IPC分类号： G01B7/30

CPC分类号： G01D5/145

摘要： Disclosed herein, in an exemplary embodiment, is a position sensor assembly including a circular-shaped or rhombus-shaped magnet and at least one magnetic flux density sensor, such as a Hall effect sensor, wherein rotation of the magnet is detected by the at least one sensor. The magnet may be positioned coaxially with the longitudinal axis of a rotor shaft of a motor and provided within a support. A position extraction algorithm may be employed using the output from the sensors to detect the position of the rotor shaft.

摘要翻译： 这里公开的是，在一个示例性实施例中，是一种位置传感器组件，其包括圆形或菱形磁体和至少一个磁通密度传感器，例如霍尔效应传感器，其中磁体的旋转至少被检测到 一个传感器。 磁体可以与电动机的转子轴的纵向轴线同轴设置并设置在支撑件内。 可以使用来自传感器的输出来检测转子轴的位置的位置提取算法。

公开(公告)号：US5982067A

公开(公告)日：1999-11-09

申请号：US650519

申请日：1996-05-20

申请人： Tomy Sebastian ,  Steven James Collier-Hallman

发明人： Tomy Sebastian ,  Steven James Collier-Hallman

IPC分类号： B62D5/04 ,  H02K21/16 ,  H02K29/00 ,  H02P6/18 ,  H02K3/00

CPC分类号： B62D5/0403 ,  H02K21/16 ,  H02P6/182 ,  H02P2209/07

摘要： A brushless DC motor has a permanent magnet rotor comprising p magnetic poles and a stator having an integer multiple of 6*p*n slots containing windings, n being a positive, non-zero integer, and the poles and slots being skewed by one slot pitch with respect to each other. The windings in the slots are electrically connected in two separate groups of three-phase windings with each group having three phase terminals, the windings of each group being distributed in phase belts occupying alternate sectors of 30 electrical degrees and the windings of the first group alternating with the windings of the second group. Since the trapezoidal back EMF voltage curve has a wider top it exhibits less droop, compared with an equivalent three-phase brushless DC motor of the prior art, over the 60 electrical degree period centered on maximum back EMF in which torque producing current is applied. In addition, the maxima of back EMF voltage across pairs of terminals in the two groups of three phase windings are 30 electrical degrees out of phase with each other, so that variations in back EMF voltage in the two groups tend to cancel each other as torque producing current is applied to both groups. The result is significantly less torque ripple due to back EMF variation, compared with an equivalent three-phase brushless DC motor of the prior art, and less vibration coupled to the steering wheel of an electric power steering system in which the motor is used as a power assist actuator.

摘要翻译： 无刷直流电动机具有包括p个磁极的永磁转子和具有包含绕组的6 * p * n个槽的整数倍的定子，n是正的，非零的整数，并且极和槽被歪斜一个槽 相对于彼此的间距。 槽中的绕组以两组独立的三相绕组电连接，每组具有三相端子，每组的绕组分布在相位带中，占相位30度的交替扇形，第一组的绕组交替 与第二组的绕组。 由于梯形反电动势电压曲线具有较宽的顶部，与现有技术的等效三相无刷直流电动机相比，以施加转矩产生电流的最大反电动势为中心的60个电度周期，其下降幅度较小。 此外，两组三相绕组中的两对端子之间的反电动势电压的最大值彼此相差30电角度，使得两组中的反电动势电压的变化趋向于相互抵消作为转矩 生产电流被应用于两组。 结果是与现有技术的等效三相无刷直流电动机相比，由于反EMF变化而导致的转矩波动显着更小，并且较少的振动耦合到电动转向系统的方向盘，其中电动机用作 动力辅助致动器。