公开(公告)号：US20150036400A1

公开(公告)日：2015-02-05

申请号：US14446509

申请日：2014-07-30

Applicant: Control Techniques Limited

Inventor： Antony John Webster ,  Simon David Hart

IPC: H02M7/5387

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.

Abstract translation: 提供了一种用于根据调制方案来控制功率转换器中的开关装置的方法和控制系统。 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被确定 交流输出。 然而，在每个切换周期中，存在至少两个时间段，其中开关装置处于非活动配置，并且至少两个时间段之间的比率根据与切换装置相关联的温度而改变。

公开(公告)号：US20140293665A1

公开(公告)日：2014-10-02

申请号：US14228953

申请日：2014-03-28

Applicant: Control Techniques Limited

Inventor： Simon David Hart ,  Antony John Webster ,  Kondala Rao Gandu

IPC: H02M1/36

CPC classification number: H02M1/36 ,  H02M1/32 ,  H02M7/062

Abstract: A damage limitation approach comprising determining that a voltage produced by a rectifier circuit is indicative of a fault and consequently controlling a switch operable to bypass a resistive element of a circuit via which the rectifier circuit is supplied.

Abstract translation: 一种损伤限制方法，包括确定由整流器电路产生的电压指示故障，并因此控制可操作以绕过提供整流器电路的电路的电阻元件的开关。

公开(公告)号：US20140239741A1

公开(公告)日：2014-08-28

申请号：US14193561

申请日：2014-02-28

Applicant: Control Techniques Limited

Inventor： Michael Cade ,  Gareth Christopher James

IPC: H03K3/011

CPC classification number: H03K17/14 ,  Y10T307/773

Abstract: A method for controlling the temperature of a first semiconductor device on an inverter module of a drive configured to drive an electrical machine is disclosed. The method comprises calculating at least one harmonic component of at least one power loss of at least the first semiconductor device; using the at least one harmonic component of the at least one power loss of the at least the first semiconductor device to calculate a temperature of the first semiconductor device; and if the calculated temperature of the first semiconductor device does not meet a predetermined temperature condition, issuing a command to control the operation of the drive such that the temperature of the first semiconductor device is changed to meet the predetermined temperature condition.

Abstract translation: 公开了一种用于控制被配置为驱动电机的驱动器的逆变器模块上的第一半导体器件的温度的方法。 该方法包括计算至少第一半导体器件的至少一个功率损耗的至少一个谐波分量; 使用所述至少第一半导体器件的所述至少一个功率损耗的所述至少一个谐波分量来计算所述第一半导体器件的温度; 并且如果第一半导体器件的计算温度不满足预定的温度条件，则发出控制驱动器的操作使得第一半导体器件的温度改变以满足预定温度条件的命令。

公开(公告)号：US20140117905A1

公开(公告)日：2014-05-01

申请号：US14063532

申请日：2013-10-25

Applicant: Control Techniques Limited

Inventor： Simon David Hart

IPC: H02P25/02

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 synchronised 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 synchronisation 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。

公开(公告)号：US20140085835A1

公开(公告)日：2014-03-27

申请号：US14033776

申请日：2013-09-23

Applicant: Control Techniques Limited

Inventor： Stephen Berry

IPC: H05K1/18

CPC classification number: H05K1/18 ,  H01G2/16 ,  H01G4/38 ,  H05K1/0263 ,  H05K1/0293 ,  H05K2201/10015 ,  H05K2203/175

Abstract: A capacitor bank comprising at least two series chains each comprising a plurality of capacitors, wherein the series chains are coupled in parallel at corresponding points; and a fusible link arranged to form at least part of each coupling; wherein the corresponding points of each chain that are coupled to one another are at the same voltage when the capacitor bank is operational.

Abstract translation: 一种电容器组，包括至少两个串联链，每个串联链包括多个电容器，其中所述串联链在相应的点处并联耦合; 以及布置成形成每个联接器的至少一部分的可熔连接件; 其中当电容器组可操作时，彼此耦合的每个链的相应点处于相同的电压。

公开(公告)号：US20140049999A1

公开(公告)日：2014-02-20

申请号：US13969992

申请日：2013-08-19

Applicant: Control Techniques Limited

Inventor： Simon David Hart

IPC: H02M7/539

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 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.

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。

公开(公告)号：US20180249594A1

公开(公告)日：2018-08-30

申请号：US14958399

申请日：2015-12-03

Applicant: Control Techniques Limited

Inventor： Richard Samuel GIBSON ,  Jonathan Robert HOLMAN-WHITE ,  Robert Gwyn WILLIAMS

IPC: H05K7/20

CPC classification number: H05K7/20718 ,  G11B33/142 ,  H05K7/20145

Abstract: A drive apparatus is provided which comprising a ducting piece coupled to a drive comprises an air vent. The base of the ducting piece is open to receive exhaust gases from the drive and the ducting piece then diverts these gases horizontally. A system may be provided comprises a plurality of such apparatuses, with the ducting pieces coupled to one another to pass the gases along a horizontal pathway.

公开(公告)号：US10012684B2

公开(公告)日：2018-07-03

申请号：US15383828

申请日：2016-12-19

Applicant: Control Techniques Limited

Inventor： Mark Towers ,  Dylan Wyn Davies

IPC: G01R31/14 ,  G01R31/02 ,  G01R27/18 ,  G01R31/07 ,  H02S50/10 ,  H02S40/32

CPC classification number: G01R31/025 ,  G01R27/18 ,  G01R31/024 ,  G01R31/07 ,  H02S40/32 ,  H02S50/10

Abstract: A ground fault detection circuit comprising a fuse and a fuse detect circuit. The fuse and the fuse detect circuit are arranged to be coupled in parallel between a reference point and a second point of a monitored circuit for which ground faults are to be detected. The fuse detect circuit is further arranged to detect a fuse break indicative of a ground fault condition and disable at least a portion of the monitored circuit.

公开(公告)号：US09762141B2

公开(公告)日：2017-09-12

申请号：US14195063

申请日：2014-03-03

Applicant: Control Techniques Limited

Inventor： Frank Weiner Heerdt

IPC: H02M1/12 ,  H02M7/49 ,  H02M5/458 ,  H02M7/487

CPC classification number: H02M7/49 ,  H02M5/458 ,  H02M7/487 ,  Y10T307/696

Abstract: A circuit for an electrical load comprises a passive transformer, the secondary of which is connected to power cells for each phase according to the transformer tappings. Each power cell comprises a low cost but efficient power factor correction circuit to produce lower harmonics on the transformer.

公开(公告)号：US20170207740A1

公开(公告)日：2017-07-20

申请号：US15478697

申请日：2017-04-04

Applicant: NIDEC CONTROL TECHNIQUES LIMITED

Inventor： Colin HARGIS

IPC: H02P23/14 ,  H02P23/04 ,  H02P27/06

CPC classification number: H02P23/14 ,  H02P23/04 ,  H02P27/06 ,  H02P2205/03

Abstract: An electromechanical system includes an inverter drive, a component arranged during operation to generate a variable force having one or more periodic frequency components, and processing circuitry arranged to determine the power output of the inverter drive, measure a difference between the power output and a reference power output, and control an output frequency of the inverter drive as a function of the measured difference, so as to stabilise the power output during operation of the component. Other example electromechanical systems, inverter drives and methods are also disclosed.