专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US6166502A Thermal current limiting apparatus and method for vehicle system with electric motor actuator 有权
标题翻译：具有电动执行器的车辆系统热流限制装置和方法
公开(公告)号：US6166502A
公开(公告)日：2000-12-26
申请号：US329874
申请日：1999-06-11
申请人： Kathryn Lynn Pattok , Steven James Collier-Hallman , Ashok Chandy , Julie Ann Kleinau
发明人： Kathryn Lynn Pattok , Steven James Collier-Hallman , Ashok Chandy , Julie Ann Kleinau
IPC分类号： H02P29/02 , H02K17/32
CPC分类号： H02P29/02
摘要： An electric motor actuator used in an environment of varying loads for varying time periods is efficiently designed to a predetermined specification in terms of both motor load and time and operated up to but not exceeding this specification over the full expected operating range. A motor load signal is low pass filtered with a plurality of time constants spanning a range of expected motor operation to generate a plurality of filtered motor load signals each associated with one of the time constants. Each of these filtered motor load signals is compared with a predetermined reference value corresponding to the associated time constant. If one or more of the filtered motor load signals exceeds the predetermined reference value with which it is compared, the one that so exceeds by the greatest margin is selected. A command current limit factor is derived from the selected filtered motor load signal and used to limit the commanded motor current. The motor load signal preferably indicates motor operating current and may be derived from a motor current sensor or from the limited command current signal, motor speed and operating voltage to compensate for a decrease of current with motor speed due to inductance/slope compensation and voltage limit effects.
摘要翻译：在电动机负载和时间方面，在负载变化的环境中使用的电动机致动器在电动机负载和时间方面被有效地设计成预定的规格，并且在整个预期工作范围内被操作达到但不超过该规范。电动机负载信号通过多个时间常数进行低通滤波，该时间常数跨越预期的电动机运行的范围，以生成每个与时间常数之一相关联的多个过滤的电动机负载信号。将这些滤波的马达负载信号中的每一个与对应于相关联的时间常数的预定参考值进行比较。如果一个或多个滤波的电动机负载信号超过与其进行比较的预定参考值，则选择超过最大余量的参考值。指令电流限制因子来自所选滤波的电机负载信号，用于限制指令的电机电流。电动机负载信号优选地表示电动机工作电流，并且可以从电动机电流传感器或从限制的指令电流信号，电动机速度和工作电压得出，以补偿由于电感/斜率补偿和电压限制引起的电动机速度的降低效果。

2. 发明授权

US06408235B1 End-of-travel impact management system 失效
标题翻译：旅行结束管理系统
公开(公告)号：US06408235B1
公开(公告)日：2002-06-18
申请号：US09664183
申请日：2000-09-18
申请人： Eugene Thomas Tanke, II , Ashok Chandy , Julie Ann Kleinau , Steven James Collier-Hallman
发明人： Eugene Thomas Tanke, II , Ashok Chandy , Julie Ann Kleinau , Steven James Collier-Hallman
IPC分类号： B62D506
CPC分类号： B62D5/0469
摘要： A system and method for controlling the collisions between elements of an automotive rack and pinion steering apparatus and an end-of-travel stop is presented. The system comprises a sensor for sensing a set of dynamic variables of the rack and pinion steering apparatus and operative thereby to generate as output therefrom a first set of signals indicative of the set of dynamic variables; a controller responsive to the first set of signals and operative thereby to provide as output therefrom a modified torque assist command; and a motor drive assembly drive assembly responsive to the modified torque assist command and operative thereby to provide modified torque assistance to the rack and pinion steering apparatus. In another embodiment, the dynamic data is used to calculate a torque limit to be imposed upon the torque assist command whenever the steering system is close to end-of-stop. The two embodiments may also be superimposed. The invention reduces torque at end-of-travel impacts, and helps preserve the mechanical integrity of the power steering system.
摘要翻译：提出了一种用于控制汽车齿条和小齿轮转向装置的元件与行程终点之间的碰撞的系统和方法。该系统包括用于感测齿条和小齿轮转向装置的一组动态变量的传感器，并且由此产生作为其输出的第一组信号，该第一组信号指示该组动态变量; 响应于所述第一组信号并由此操作的控制器提供修改的转矩辅助命令作为其输出; 以及电动机驱动组件驱动组件，其响应于改进的扭矩辅助指令并由此操作，以向齿条和小齿轮转向装置提供修改的扭矩辅助。在另一个实施例中，只要转向系统接近停止终止，动态数据被用于计算要施加在转矩辅助指令上的转矩极限。两个实施例也可以叠加。本发明减少了行程结束冲击时的扭矩，并有助于保持动力转向系统的机械完整性。

3. 发明授权

US06448724B1 Apparatus and method for commutation noise reduction 失效
标题翻译：换向降噪装置及方法
公开(公告)号：US06448724B1
公开(公告)日：2002-09-10
申请号：US09658352
申请日：2000-09-11
申请人： Julie Ann Kleinau , Steven James Collier-Hallman , Dennis B. Skellenger
发明人： Julie Ann Kleinau , Steven James Collier-Hallman , Dennis B. Skellenger
IPC分类号： H02K2300
CPC分类号： B62D5/046 , B62D5/0463 , H02P6/10 , H02P6/14
摘要： A brushless DC motor modifies motor commutation events to reduce noise by providing overlapping activation of the switch being deactivated with the switch being newly activated so that three switches are temporarily activated. The newly activated switch is pulse width modulated with a motor torque controlling duty cycle, and the switch being deactivated is pulse width modulated synchronously with the newly activated switch but with a duty cycle decreasing from the torque controlling duty cycle. The decreasing modulation of the switch being deactivated allows a slower current decrease in the phase turning off to reduce or eliminate the disturbances, and thus the noise. The decreasing modulation is preferably exponential in manner, with a time constant varying inversely with motor speed so that the duty cycle reaches a predetermined minimum in a predetermined maximum number of motor electrical degrees. The decreasing modulation may be switched on at low motor speeds where its noise reduction is required and switched off at higher motor speeds where the potential for interference with commutation is greater. The decreasing modulation is applicable in a dual switching mode in which each activated switch, except for the switch being deactivated in commutation, is pulse width modulated at the torque controlling duty cycle, or in a modified single switching mode in which the activated switch of one of the upper or lower groups is always closed continuously during its activation, except for commutation, during which the switch remaining on, which alternates between the groups, is closed continuously. Each mode of operation is applied in the motor speed/torque region to which it is best suited.
摘要翻译：无刷直流电动机通过在开关被新激活的情况下通过提供交换机的重叠激活来改变电动机换向事件以减少噪声，从而使三个开关暂时被激活。新启动的开关通过电机转矩控制占空比进行脉冲宽度调制，并且禁用的开关与新启动的开关同步脉宽调制，但占空比从转矩控制占空比下降。开关减小的调制被禁用允许相位关断中的较慢的电流减小以减少或消除干扰，从而减少噪声。减小的调制优选地是指数方式，其中时间常数与电动机速度成反比变化，使得占空比在预定的最大数量的电动机电度中达到预定的最小值。降低的调制可以在需要减少噪声的低电机速度下接通，并且在更换电机的电机速度更高的情况下关闭。减小的调制适用于双重切换模式，其中除了开关在换向中被禁用之外，每个被激活的开关在扭矩控制占空比下进行脉宽调制，或者在修改的单次切换模式中，其中一个上，下组在其激活期间总是被连续地闭合，除了换向之外，在组中之间交替存在的开关被连续地闭合。每种操作模式都适用于最适合的电机速度/转矩区域。

4. 发明授权

US6002226A Brushless DC motor control method and apparatus for reduced commutation noise 失效
标题翻译：无刷直流电动机控制方法及减少换向噪音的装置
公开(公告)号：US6002226A
公开(公告)日：1999-12-14
申请号：US99007
申请日：1998-06-17
申请人： Steven James Collier-Hallman , Julie Ann Kleinau , Dennis B. Skellenger
发明人： Steven James Collier-Hallman , Julie Ann Kleinau , Dennis B. Skellenger
IPC分类号： H02P6/10 , H01R39/46
CPC分类号： H02P6/10
摘要： A brushless DC motor modifies motor commutation events to reduce noise by providing overlapping activation of the switch being deactivated with the switch being newly activated so that three switches are temporarily activated. The newly activated switch is pulse width modulated with a motor torque controlling duty cycle, and the switch being deactivated is pulse width modulated synchronously with the newly activated switch but with a duty cycle decreasing from the torque controlling duty cycle. The decreasing modulation of the switch being deactivated allows a slower current decrease in the phase turning off to reduce or eliminate the disturbances, and thus the noise. The decreasing modulation is preferably exponential in manner, with a time constant varying inversely with motor speed so that the duty cycle reaches a predetermined minimum in a predetermined maximum number of motor electrical degrees. The decreasing modulation may be switched on at low motor speeds where its noise reduction is required and switched off at higher motor speeds where the potential for interference with commutation is greater. The decreasing modulation is applicable in a dual switching mode in which each activated switch, except for the switch being deactivated in commutation, is pulse width modulated at the torque controlling duty cycle, or in a modified single switching mode in which the activated switch of one of the upper or lower groups is always closed continuously during its activation, except for commutation, during which the switch remaining on, which alternates between the groups, is closed continuously. Each mode of operation is applied in the motor speed/torque region to which it is best suited.
摘要翻译：无刷直流电动机通过在开关被新激活的情况下通过提供交换机的重叠激活来改变电动机换向事件以减少噪声，从而使三个开关暂时被激活。新启动的开关通过电机转矩控制占空比进行脉冲宽度调制，并且禁用的开关与新启动的开关同步脉宽调制，但占空比从转矩控制占空比下降。开关减小的调制被禁用允许相位关断中的较慢的电流减小以减少或消除干扰，从而减少噪声。减小的调制优选地是指数方式，其中时间常数与电动机速度成反比变化，使得占空比在预定的最大数量的电动机电度中达到预定的最小值。降低的调制可以在需要减少噪声的低电机速度下接通，并且在更换电机的电机速度更高的情况下关闭。减小的调制适用于双重切换模式，其中除了开关在换向中被禁用之外，每个被激活的开关在扭矩控制占空比下进行脉宽调制，或者在修改的单次切换模式中，其中一个上，下组在其激活期间总是被连续地闭合，除了换向之外，在组中之间交替存在的开关被连续地闭合。每种操作模式都适用于最适合的电机速度/转矩区域。

5. 发明授权

US06548975B2 Stall detection and thermal protection of vehicular systems having an electric motor 有权
标题翻译：具有电动马达的车辆系统失速检测和热保护
公开(公告)号：US06548975B2
公开(公告)日：2003-04-15
申请号：US09896704
申请日：2001-06-29
申请人： Julie Ann Kleinau , Ashok Chandy
发明人： Julie Ann Kleinau , Ashok Chandy
IPC分类号： H02K1732
CPC分类号： B62D5/0469 , B62D5/0487 , H02P29/02
摘要： A vehicular system includes a controller and an electric motor in signal communication with the controller for receiving current and rotating at speed; while the controller includes a first function responsive to a signal indicative of the speed of the electric motor, a filter responsive to a signal indicative of the heat generation rate of the vehicular system, a second function in signal communication with the first function and the filter, and a limit calculation function in signal communication with the second function for providing a motor current limit responsive to the second function; wherein a method for controlling the vehicular system includes receiving a signal indicative of the heat generation rate of the vehicular system, receiving a signal indicative of a speed of the electric motor, providing a scale factor or an overload value in response to the received signal indicative of speed, filtering the received signal indicative of heat generation rate in correspondence with a time constant, processing the filtered signal by executing a multiplication by the scale factor or a comparison with the overload value to produce a signal indicative of compliance with a duty cycle requirement, and calculating a motor current limit in correspondence with the processed signal to thereby protect the system from thermal overload while maximizing its performance.
摘要翻译：车辆系统包括控制器和与控制器进行信号通信的电动机，用于接收电流和转速; 而控制器包括响应于指示电动机速度的信号的第一功能，响应于指示车辆系统的发热速率的信号的滤波器，与第一功能信号通信的第二功能和滤波器以及与第二功能的信号通信中的限制计算功能，用于响应于第二功能提供电动机电流限制; 其中用于控制所述车辆系统的方法包括接收指示所述车辆系统的发热速率的信号，接收指示所述电动机的速度的信号，响应于所述接收到的信号指示，提供比例因子或过载值根据时间常数过滤表示发热速率的接收信号，通过执行与比例因子相乘或与过载值的比较来处理滤波信号，以产生表示符合占空比要求的信号并根据处理的信号计算电机电流极限，从而保护系统免受热过载，同时最大化其性能。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式