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公开(公告)号：US09614459B2
公开(公告)日：2017-04-04
申请号：US14446509
申请日：2014-07-30
Applicant: Control Techniques Limited
Inventor： Antony John Webster , Simon David Hart
IPC: H02M3/24 , H02M7/5387 , H02M1/32
CPC classification number: H02M7/53871 , H02M1/32 , H02M7/5387 , H02M2001/327
Abstract: There is provided a method and control system for controlling a switching device in a 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 comprises 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. However, in each switching period, there are at least two time periods in which the switching device is in an inactive configuration, and the ratio between those at least two time periods is changed in dependence on temperature associated with the switching device.
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公开(公告)号：US20140125262A1
公开(公告)日：2014-05-08
申请号：US14068464
申请日：2013-10-31
Applicant: Control Techniques Limited
Inventor： Simon David Hart , Antony John Webster , Kondala Rao Gandu
IPC: H02P6/00
CPC classification number: H02P6/182 , G01R31/343
Abstract: A circuit for monitoring the operation of an electric motor comprises means for deriving a motor signal indicative of a relatively low frequency characteristic of the motor commutation current (for example the back EMF ripple) by rejecting the high frequency components which are mainly the result of the commutation events. The circuit also includes means for producing a pulse from the low frequency characteristic which has a duration related to the motor speed.
Abstract translation: 用于监视电动机的操作的电路包括用于通过拒绝主要是由于电动机的转换结果的高频分量而导出表示电动机换向电流（例如，反电动势纹波）的较低频率特性的电动机信号的装置 换向事件 该电路还包括用于从具有与电动机速度相关的持续时间的低频特性产生脉冲的装置。
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公开(公告)号：US20140095104A1
公开(公告)日：2014-04-03
申请号：US14044294
申请日：2013-10-02
Applicant: Control Techniques Limited
Inventor： Rhys Marc Owen , Simon David Hart
IPC: G01K1/02
Abstract: A method and apparatus to monitor the condition of an apparatus (e.g a variable speed drive), the apparatus comprising: a processor, a plurality of devices and a plurality of temperature sensors, each sensor associated with a device, the processor being arranged in use to: determine, for each of a plurality of sensors, the temperature of the associated device based on the temperature sensed by the sensor and the mode of operation of the device; compare the determined temperatures for each device with stored data relating to the mode of operation of the apparatus; and based on the comparison determine whether the apparatus is operating as expected in the mode of operation.
Abstract translation: 一种用于监视装置（例如变速驱动器）的状况的方法和装置，所述装置包括：处理器，多个装置和多个温度传感器，每个传感器与装置相关联，所述处理器被布置在使用中 基于由所述传感器感测的温度和所述设备的操作模式，为所述多个传感器中的每一个确定所述相关设备的温度; 将每个设备的确定的温度与存储的与设备的操作模式有关的数据进行比较; 并且基于比较来确定设备在操作模式下是否按预期操作。
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公开(公告)号：US09300239B2
公开(公告)日：2016-03-29
申请号：US14063532
申请日：2013-10-25
Applicant: Control Techniques Limited
Inventor： Simon David Hart
CPC classification number: H02P25/022 , H02P23/20 , H02P23/26 , H02P25/024
Abstract: 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.
Abstract translation: 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。
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公开(公告)号：US09197139B2
公开(公告)日：2015-11-24
申请号：US14091775
申请日：2013-11-27
Applicant: Control Techniques Limited
Inventor： Simon David Hart , Stephen Berry
CPC classification number: H02M7/1626 , H02M1/32
Abstract: A rectifier circuit comprising an AC input, at least one thyristor coupled to the AC input, a DC bus driven by the at least one thyristor, a controller arranged to: derive a first current in the DC bus, derive a maximum current demand on the DC bus, and provide a trigger signal to the at least one thyristor based on the derived maximum current and the derived first current.
Abstract translation: 一种整流器电路，包括AC输入，耦合到AC输入的至少一个晶闸管，由所述至少一个晶闸管驱动的DC总线;控制器，被布置成：导出所述DC总线中的第一电流， DC总线，并且基于导出的最大电流和导出的第一电流向至少一个晶闸管提供触发信号。
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Patent Agency Ranking
公开(公告)号：US08958222B2
公开(公告)日：2015-02-17
申请号：US13969992
申请日：2013-08-19
Applicant: Control Techniques Limited
Inventor： Simon David Hart
CPC classification number: H02M7/539 , H02M7/53875 , H02M2007/53876
Abstract: 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.
Abstract translation: 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。
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公开(公告)号：US20140153308A1
公开(公告)日：2014-06-05
申请号：US14091775
申请日：2013-11-27
Applicant: Control Techniques Limited
Inventor： Simon David Hart , Stephen Berry
IPC: H02M7/155
CPC classification number: H02M7/1626 , H02M1/32
Abstract: A rectifier circuit comprising an AC input, at least one thyristor coupled to the AC input, a DC bus driven by the at least one thyristor, a controller arranged to: derive a first current in the DC bus, derive a maximum current demand on the DC bus, and provide a trigger signal to the at least one thyristor based on the derived maximum current and the derived first current.
Abstract translation: 一种整流器电路，包括AC输入，耦合到AC输入的至少一个晶闸管，由所述至少一个晶闸管驱动的DC总线;控制器，被布置成：导出所述DC总线中的第一电流， DC总线，并且基于导出的最大电流和导出的第一电流向至少一个晶闸管提供触发信号。
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公开(公告)号：US20140097784A1
公开(公告)日：2014-04-10
申请号：US14049754
申请日：2013-10-09
Applicant: Control Techniques Limited
Inventor： Simon David Hart
IPC: H02P25/02
CPC classification number: H02P25/024 , H02P23/26
Abstract: A method for controlling a motor at low operational speed is disclosed, wherein the motor comprises a magnetic rotor and a stator arranged to produce a magnetic field responsive to an applied electric current, wherein the method comprises ramping up an electric current applied to a stator from an initial current level to a synchronisation current level over a period of time. The initial current level is less than a minimum current required by the stator to produce a magnetic field having magnetic flux of a sufficient magnitude for synchronising a position of the magnetic rotor with respect to the magnetic field. The synchronisation current level is greater than or equal to the minimum current required to produce a magnetic field having magnetic flux of a sufficient magnitude to synchronise the position of the magnetic rotor with the magnetic field.
Abstract translation: 公开了一种用于以低操作速度控制电动机的方法，其中所述电动机包括磁转子和定子，其布置成响应于施加的电流产生磁场，其中所述方法包括从施加到定子的电流 在一段时间内的初始电流电平达到同步电流电平。 初始电流水平小于定子产生具有足够大的磁通量以使磁转子相对于磁场的位置同步的磁场所需的最小电流。 同步电流电平大于或等于产生具有足够大的磁通量的磁场所需的最小电流，以使磁转子与磁场的位置同步。
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公开(公告)号：US09893668B2
公开(公告)日：2018-02-13
申请号：US13946541
申请日：2013-07-19
Applicant: Control Techniques Limited
Inventor： Simon David Hart , Michael Cade , Richard Mark Wain
CPC classification number: H02P27/06 , H02M7/493 , H02M2001/0003 , H02M2001/327 , H02P29/60
Abstract: Embodiments of the present invention relate to an a method, apparatus and computer program product for controlling the operation of a drive unit comprising a plurality of switching modules arranged to receive a DC electricity supply and generate an AC electricity supply for driving a load from the received DC electricity supply, the AC electricity supply being generated by the switching of the plurality of switching modules between a conducting state and a non-conducting state. The method comprises receiving one or more characteristics associated with each of the switching modules, comparing, for each switching module of the plurality of switching modules, a characteristic of the switching module with an equivalent characteristic associated with one or more other switching modules of the plurality of switching modules, and controlling a time period during which one or more of the plurality of switching modules are in the conducting state in accordance with a result of the comparison.
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公开(公告)号：US09618543B2
公开(公告)日：2017-04-11
申请号：US14206824
申请日：2014-03-12
Applicant: Control Techniques Limited
Inventor： Simon David Hart
CPC classification number: G01R19/0092 , G01R19/25 , H02M7/5387 , H02M2001/0009
Abstract: A method and a control system for a multiphase-phase inverter system, the control system comprising an electric current detection circuit and a processor, wherein each phase of an electrical cycle is separated into a plurality of sections, inputs from the electric current detection circuit are received, each input indicating a measured phase current, and a phase current is calculated in each section, wherein the phase current calculation in at least one of the sections is determined from a changing ratio of the value of the phase current calculated from the measured values of the other phase currents in the multiphase system and the measured value of the phase.
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