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    • 3. 发明授权
    • Rotor control
    • 转子控制
    • US09300239B2
    • 2016-03-29
    • US14063532
    • 2013-10-25
    • Control Techniques Limited
    • Simon David Hart
    • H02P6/00H02P21/00H02P7/00H02P25/02H02P23/00
    • H02P25/022H02P23/20H02P23/26H02P25/024
    • A method arranged to control a motor for driving a load is disclosed. The motor and load form at least a part of a system and the motor comprises a stator arranged to produce a varying magnetic field responsive to an applied AC voltage and a rotor arranged to rotate responsive to the varying magnetic field produced by the stator, the rotor rotating at a speed synchronized to a frequency of the applied AC voltage. The method comprises receiving a target rotor speed, determining a voltage level for the applied AC voltage for producing a magnetic field having magnetic flux of sufficient magnitude to maintain the rotor in synchronization with the frequency of the applied AC voltage when rotating at the target speed of rotation. The voltage level is determined in accordance with the target rotor speed and a model of the system. The model comprising a plurality of model elements, wherein one or more of the model elements is indicative of an effect of one or more parts of the system on rotation of the rotor when the speed of the rotor is constant and one or more of the model elements are indicative of an effect of one or more parts of the system on rotation of the rotor when the speed of the rotor is dynamic. The method further comprising applying the applied AC voltage to the stator at the determined voltage level and at a frequency required to provide the target rotor speed.
    • 公开了一种布置成控制用于驱动负载的电动机的方法。 电动机和负载形成系统的至少一部分,并且电动机包括定子,其布置成响应于所施加的AC电压产生变化的磁场,以及转子,其布置成响应于由定子产生的变化的磁场而旋转,转子 以与所施加的AC电压的频率同步的速度旋转。 该方法包括接收目标转子速度,确定所施加的AC电压的电压电平,以产生具有足够大的磁通量的磁场,以在以目标速度转动时转子与施加的交流电压的频率同步 回转。 电压电平根据目标转子速度和系统的型号确定。 该模型包括多个模型元件,其中当转子的速度恒定时,模型元件中的一个或多个指示系统的一个或多个部分对转子旋转的影响,并且模型中的一个或多个 元件表示当转子的速度是动态时系统的一个或多个部分对转子的旋转的影响。 该方法还包括将所施加的交流电压施加到所确定的电压电平和以提供目标转子速度所需的频率的定子。
    • 5. 发明授权
    • Modulation of switching signals in power converters
    • 电源转换器中开关信号的调制
    • US08958222B2
    • 2015-02-17
    • US13969992
    • 2013-08-19
    • Control Techniques Limited
    • Simon David Hart
    • H02M5/42H02M7/539
    • H02M7/539H02M7/53875H02M2007/53876
    • There is provided a method and control system for reducing noise in a power converter by controlling a switching device in the power converter according to a modulation scheme. The switching device couples a direct current (DC) source to provide an alternating current (AC) output at a particular switching frequency. The method includes the step of, in each switching period, switching the switching device between active configurations providing a finite voltage at the output and inactive configurations providing a zero voltage at the output. The ratio between the total period of time in which the switching device is in an active configuration and the total period of time in which the switching device is in an inactive configuration is the same for each switching period and is determined according to the desired voltage at the AC output.
    • 提供了一种通过根据调制方式控制功率转换器中的开关装置来降低功率转换器中的噪声的方法和控制系统。 开关器件耦合直流(DC)源,以在特定的开关频率提供交流(AC)输出。 该方法包括以下步骤:在每个开关周期中,在输出端提供有限电压的有源配置和在输出端提供零电压的非活动配置之间切换开关装置。 开关器件处于有效配置的总时间段与开关器件处于非激活配置的总时间之间的比率对于每个开关周期是相同的,并且根据期望的电压 交流输出。
    • 7. 发明申请
    • Device For Locking To A DIN Rail
    • 用于锁定到DIN导轨的装置
    • US20140339186A1
    • 2014-11-20
    • US14276444
    • 2014-05-13
    • Control Techniques Limited
    • Charles Anthony Cachia
    • H05K7/18H05K7/12H05K7/02
    • H02B1/0526H02B1/0523Y10T29/49826
    • There is provided a device (50) for locking to a DIN rail (10). The device comprises a shaft (20) defining an axis of rotation, and first and second rail-engaging members (30a, 30b) connected to the shaft. The rail-engaging members are each shaped to engage a DIN rail in a respective engaging position. The shaft is rotatable about the axis of rotation and thereby arranged to urge each rail-engaging member into its respective engaging position with a DIN rail positioned between the first and second rail-engaging members. The invention provides for a means of locking a device to a DIN rail. Once locked to the DIN rail, an electrical component such as a circuit breaker or the like may be mounted or coupled to the device. The locking device may provide for rapid removal/attachment to the DIN rail. Equipment may either be mounted directly to the locking device or indirectly by mounting the component or electrical equipment to a platform or other support that is itself attached to the locking device. There is also provided a method of mounting a component (60) to a DIN rail (10). The method comprises positioning the DIN rail between first and second rail-engaging members (30a, 30b) connected to an actuator (20). The method further comprises triggering the actuator so as to simultaneously urge each rail-engaging member into engagement with the DIN rail. The method further comprises mounting the component to the actuator and/or at least one of the rail-engaging members. There is also provided a method of forming a device (50) for locking to a DIN rail (10). The method comprises threading a first rail-engaging member (30b) onto a first threaded shaft portion (20b). The method also comprises threading a second rail-engaging member (30a) onto a second threaded shaft portion (20a). The method also comprises joining the first and second shaft portions.
    • 提供了用于锁定到DIN导轨(10)的装置(50)。 该装置包括限定旋转轴线的轴(20)和连接到轴的第一和第二轨道接合构件(30a,30b)。 轨道接合构件各自被成形为在相应的接合位置接合DIN轨道。 轴能够围绕旋转轴线旋转,从而布置成将每个导轨接合构件推动到其相应的接合位置,其中定位在第一和第二轨道接合构件之间的DIN轨道。 本发明提供了将装置锁定到DIN导轨上的手段。 一旦锁定到DIN导轨上,可以将诸如断路器等的电气部件安装或耦合到该装置。 锁定装置可以提供快速拆卸/附接到DIN导轨。 设备可以直接安装到锁定装置,或通过将部件或电气设备安装到本身连接到锁定装置的平台或其他支撑件上而间接地安装。 还提供了将部件(60)安装到DIN导轨(10)上的方法。 该方法包括将DIN轨道定位在连接到致动器(20)的第一和第二轨道接合构件(30a,30b)之间。 该方法还包括触发致动器以便同时促使每个导轨接合构件与DIN导轨接合。 该方法还包括将部件安装到致动器和/或轨道接合部件中的至少一个。 还提供了一种形成用于锁定到DIN导轨(10)的装置(50)的方法。 该方法包括将第一导轨接合构件(30b)螺纹连接到第一螺纹轴部分(20b)上。 该方法还包括将第二轨道接合构件(30a)穿过第二螺纹轴部分(20a)。 该方法还包括接合第一和第二轴部分。