公开(公告)号：US20180261996A1

公开(公告)日：2018-09-13

申请号：US15911445

申请日：2018-03-05

Applicant: Yazaki Corporation ,  HONDA MOTOR CO., LTD.

Inventor： Takashi KIKUCHI ,  Keisuke UETA ,  Syunsuke NAGAKURA ,  Takahiro MIYAKAWA ,  Tomoya NISHINO ,  Noboru UJIGAWA ,  Seiju KAWAMATA ,  Masataka TSUKIOKA ,  Rikuya EZOE

IPC: H02H5/04 ,  G01K3/00 ,  G01K7/42 ,  G01R19/00 ,  H02H3/08 ,  H02H6/00

CPC classification number: H02H5/04 ,  G01K3/005 ,  G01K7/42 ,  G01R19/0092 ,  H01H2011/0068 ,  H02H3/08 ,  H02H6/00 ,  H02H6/005 ,  H02H7/226 ,  H02H7/268

Abstract: An electric-wire protection device includes a voltage adjustment unit that adjusts the voltage to a load, and a controller that includes a temperature calculation unit that calculates temperature information on an electric wire from a value of current, and makes the voltage adjustment unit into a shut-off state based on the temperature information. The temperature information is calculated from an amount of temperature changes based on the current value and a predetermined initial value. The controller shifts into a sleep state when a sleep condition is satisfied that includes a condition that the temperature information is lower than the initial value. The initial value when the controller returns from the sleep state is based on a convergence value of temperature in conducting energization on the electric wire at a maximum value of steady-state current.

公开(公告)号：US09419430B1

公开(公告)日：2016-08-16

申请号：US13567608

申请日：2012-08-06

Applicant: Mark D. Tostrud ,  Peter G. Stewart ,  Ryan C. Ziegler

Inventor： Mark D. Tostrud ,  Peter G. Stewart ,  Ryan C. Ziegler

IPC: H02H6/00 ,  G06Q10/06

CPC classification number: H02H6/005 ,  G06Q10/0635

Abstract: A system and method for assessing and modeling operation of a transformer includes a controller connected to a power transformer. The controller is configured to calculate theoretical information related to operation of the power transformer, assess information related to actual operation of the power transformer, and manipulate one of more parameters associated with one or more equations used to calculate the theoretical information so that the calculated theoretical information more closely approximates the information associated with the actual operation of the power transformer. In a preferred embodiment, the controller is configured to automatically manipulate the parameters associated the theoretical calculation of operation of the power transformer although the controller may also be configured to request user confirmation of manipulation of one or more of the parameters of the equations associated with the theoretical calculations related of expected actual operation of the power transformer.

Abstract translation: 用于评估和建模变压器操作的系统和方法包括连接到电力变压器的控制器。 控制器被配置为计算与电力变压器的操作相关的理论信息，评估与电力变压器的实际操作有关的信息，并且操纵与用于计算理论信息的一个或多个方程相关联的更多参数之一，使得计算的理论 信息更接近于与电力变压器的实际操作相关的信息。 在优选实施例中，控制器被配置为自动地操作与功率变压器的操作的理论计算相关联的参数，尽管控制器还可以被配置为请求用户确认对与...相关联的方程式的一个或多个参数的操纵 电力变压器预期实际运行的理论计算。

公开(公告)号：US09234803B2

公开(公告)日：2016-01-12

申请号：US13579716

申请日：2012-02-29

Applicant: Aiming Cheng ,  Feng Wang ,  Wenping Wang

Inventor： Aiming Cheng ,  Feng Wang ,  Wenping Wang

IPC: G01K7/00 ,  G01K1/12 ,  H02H6/00 ,  G06F15/00 ,  G01K7/42 ,  H02P23/14 ,  H02P6/00 ,  H02P29/00 ,  H02H7/08

CPC classification number: G01K1/12 ,  G01K7/427 ,  G01K2205/00 ,  G06F15/00 ,  H02H6/005 ,  H02H7/08 ,  H02P6/34 ,  H02P23/14 ,  H02P29/64

Abstract: A method and device for detecting the temperature of a motor winding, a method and device for thermal protection of a motor are provided, the method for detecting the temperature of a motor winding includes: obtaining the temperature of the motor winding at a first time before a time step; calculating the temperature rise of the rotor equivalent body after the motor runs for the time step; then calculating the temperature of the motor winding after the motor runs for the time step by superposing the temperature rise of the rotor equivalent body after the motor runs for the time step on the temperature of the motor winding obtained at the first time. By the method for detecting the temperature of a motor winding, the real-time monitoring on the temperature of the winding is achieved, thus applying the ability of the motor and improving sensitivity.

Abstract translation: 提供了用于检测电动机绕组的温度的方法和装置，用于电动机的热保护的方法和装置，用于检测电动机绕组的温度的方法包括：在第一次获得电动机绕组的温度之前 时间步 计算电机运行后的转子等效体温升时间步长; 然后通过将电动机运行后的转子当量体的温度上升时间步长计算出电动机运转后的电动机绕组的温度，使其在第一次获得的电动机绕组的温度上。 通过检测电机绕组的温度的方法，实现对绕组温度的实时监测，从而应用电机的能力和提高灵敏度。

公开(公告)号：US09130368B2

公开(公告)日：2015-09-08

申请号：US13767322

申请日：2013-02-14

Applicant: Deere & Company

Inventor： Eric Vilar ,  Joseph Lingle ,  Todd Velde ,  Neal Clements

IPC: H02H9/02 ,  H02H7/08

CPC classification number: H02H7/08 ,  H02H3/025 ,  H02H6/005 ,  H02H7/226 ,  H02H9/02 ,  H02P29/032 ,  H02P29/60

Abstract: An overload prevention system and method for an electric circuit having a plurality of components is disclosed, where each component has a set of pre-computed parameters. For each component, monitored parameters are observed; a limited value is computed using the pre-computed and monitored parameters; and it is determined if the limited value reached a limit. If the limited value reaches the limit; the system limits one of the monitored parameters. Pre-computed parameters can include time constant and rated current; monitored parameters can include current; and limited value can be component temperature. A time constant, rated current and rated temperature can be pre-computed such that the temperature stays at or below the rated temperature when the current is substantially equal to the rated current. Per unit values can also be used such that per unit temperature stays at or below unity when per unit current is substantially equal to unity.

Abstract translation: 公开了一种具有多个部件的电路的过载防止系统和方法，其中每个部件具有一组预先计算的参数。 对于每个组件，观察到监视的参数; 使用预先计算和监测的参数计算有限值; 并确定有限值是否达到限制。 如果有限的价值达到限制; 系统限制其中一个受监视的参数。 预先计算的参数可以包括时间常数和额定电流; 监测参数可以包括电流; 并且有限的值可以是组件温度。 时间常数，额定电流和额定温度可以预先计算，使得当电流基本上等于额定电流时，温度保持在或低于额定温度。 也可以使用每单位值，使得当每单位电流基本上等于1时，单位温度保持在或小于单位。

公开(公告)号：US09065269B2

公开(公告)日：2015-06-23

申请号：US13233457

申请日：2011-09-15

Applicant: Kevin Jefferies

Inventor： Kevin Jefferies

IPC: H02H5/04 ,  H02H7/08 ,  H02H3/00 ,  H02H3/08 ,  H02H6/00

CPC classification number: H02H3/006 ,  H02H3/085 ,  H02H6/005

Abstract: A digital thermal model for compensating for error in a current transformer used in a solid-state overload relay. The thermal model implements a difference equation that determines using a low-pass filter two parameters corresponding to calibration points along an overload trip curve. The trip curve is adjusted at an ultimate trip current (one calibration point) independently of a trip time at a locked rotor current (another calibration point) of a motor protected by the overload relay. The ultimate trip current and trip time can be adjusted based on a motor full load current set by a user. Large CT error will cause the thermal model to adjust the trip time at the locked rotor current, increasing the range of acceptable CT error, allowing the overload relay to have a wider adjustment range.

Abstract translation: 用于补偿固态过载继电器中使用的电流互感器中的误差的数字热模型。 热模型实现了一个差分方程，其确定使用低通滤波器沿着过载跳闸曲线对应于校准点的两个参数。 跳闸曲线在最终跳闸电流（一个校准点）下进行调整，独立于由过载继电器保护的电机的锁定转子电流（另一个校准点）的跳闸时间。 最大跳闸电流和跳闸时间可以根据用户设置的电机满载电流进行调整。 大的CT误差将导致热模型调节锁定转子电流的跳闸时间，增加可接受的CT误差范围，允许过载继电器具有更宽的调节范围。

公开(公告)号：US20150103450A1

公开(公告)日：2015-04-16

申请号：US14503630

申请日：2014-10-01

Applicant: Unico, Inc.

Inventor： Christoffer S. Fox ,  Adam E. Anders ,  David R. Seidl ,  Robert T. Burman

IPC: H02K11/00

CPC classification number: H02H7/1216 ,  H02H5/042 ,  H02H6/005 ,  H02H7/1225 ,  H02P29/68

Abstract: There is disclosed an apparatus and method for protecting an electrical device. The electrical device is coupled to a power source, and an electric load, a sensor, and a controller. The controller is configured to shut off the electrical device if certain sensed thermal values exceed predetermined values.

Abstract translation: 公开了一种用于保护电气装置的装置和方法。 电气设备耦合到电源，电负载，传感器和控制器。 如果某些感测的热值超过预定值，则控制器被配置为切断电气设备。

公开(公告)号：US08767367B2

公开(公告)日：2014-07-01

申请号：US13773083

申请日：2013-02-21

Applicant: Yutaka Higuchi ,  Seiji Takahashi

Inventor： Yutaka Higuchi ,  Seiji Takahashi

IPC: H02H5/04

CPC classification number: G01K7/42 ,  G01K3/005 ,  H02H6/005 ,  H02H7/228

Abstract: With a wire protection method in accordance with the present invention, the method being used for supplying electric power from a power source to a load, an applied-current to the load is detected every predetermined time, A wire rise temperature is calculated using the detected applied-current I(n) and by a relational expression concerning heat radiation and heat generation of the wire. The calculated rise in temperature is added to a reference temperature so that a wire temperature is estimated. When the estimated wire temperature is lower than a predetermined upper limit temperature, the calculation of the rise in temperature is repeated. When the estimated wire temperature has become equal to or higher than the predetermined upper limit temperature, the electric power supply from the power source to the load is stopped so that the wire is protected.

Abstract translation: 根据本发明的线路保护方法，用于从电源向负载提供电力的方法，每隔预定时间检测到负载的施加电流，使用检测到的电线上升温度 施加电流I（n）和关于电线的热辐射和发热的关系表达式。 将计算的温度升高加到参考温度，以便估算出导线温度。 当估计的线温度低于预定的上限温度时，重复温度上升的计算。 当估计的导线温度变得等于或高于预定的上限温度时，停止从电源到负载的电力供应，使得电线被保护。

公开(公告)号：US20140161152A1

公开(公告)日：2014-06-12

申请号：US14234904

申请日：2012-07-23

Applicant: Siemens Aktiengesellschaft

Inventor： Andreas Kuhn

IPC: G01R31/00

CPC classification number: G01R31/006 ,  H02H6/005 ,  H02H7/122

Abstract: In a method for thermal monitoring of a converter the temperature of the converter is measured. In addition, the output power of the converter is determined. The temperature of the converter is estimated by means of a thermal model of the converter having the output power as an input variable. The estimated temperature is compared with the measured temperature, and a corresponding monitoring signal is provided.

Abstract translation: 在转换器的热监测方法中，测量转换器的温度。 此外，确定转换器的输出功率。 通过具有作为输入变量的输出功率的转换器的热模型来估计转换器的温度。 将估计的温度与测量的温度进行比较，并提供相应的监测信号。

公开(公告)号：US20130249696A1

公开(公告)日：2013-09-26

申请号：US13991647

申请日：2011-11-29

Applicant: Yoshinori Ikuta ,  Akinori Maruyama ,  Yoshihide Nakamura ,  Keisuke Ueta

Inventor： Yoshinori Ikuta ,  Akinori Maruyama ,  Yoshihide Nakamura ,  Keisuke Ueta

IPC: H02H3/08

CPC classification number: H02H3/085 ,  G01R31/04 ,  H02H6/005 ,  Y02E10/56

Abstract: A load circuit disconnection detector includes: a current sensor (16) for detecting current flowing through a wire (W1) of a load circuit; and a protective device (100) for estimating temperature of the wire (W1) based on the detected current and forcibly turning off a semiconductor switch (Q1) if the estimated temperature of the wire reaches threshold temperature. The load circuit disconnection detector determines that there is a connection failure in the load circuit if a temperature increase calculated by a temperature calculation unit (24) is zero even a predetermined time (P1) after the semiconductor switch (Q1) is turned on.

Abstract translation: 负载电路断路检测器包括：电流传感器（16），用于检测流过负载电路的导线（W1）的电流; 以及用于基于检测到的电流来估计导线（W1）的温度并且如果线的估计温度达到阈值温度强制关闭半导体开关（Q1）的保护装置（100）。 如果在半导体开关（Q1）导通之后，即使预定时间（P1）由温度计算单元（24）计算的温度升高也为零，则负载电路断路检测器确定负载电路中存在连接故障。

公开(公告)号：US08018182B2

公开(公告)日：2011-09-13

申请号：US11912676

申请日：2006-07-17

Applicant: Heiko Roehm ,  Wolfgang Hirschburger

Inventor： Heiko Roehm ,  Wolfgang Hirschburger

IPC: H02P1/00

CPC classification number: B25F5/001 ,  H02H6/005 ,  H02H7/18

Abstract: The invention relates to a method for detecting an overload in an electric hand tool (10) comprising an electric motor (12), in particular a battery-driven electric hand tool (10). According to the invention, an operating current (iB) of the electric motor (12) is determined, the difference (ID) between the value of the operating current (IB) and at least one stored current value (IG) is determined and a thermal overload of the electric hand tool (10) is deduced from said difference (ID). The invention also relates to a corresponding monitoring device (22).

Abstract translation: 本发明涉及一种用于检测包括电动机（12），特别是电池驱动的电动手动工具（10）的电动手动工具（10）中的过载的方法。 根据本发明，确定电动机（12）的工作电流（iB），确定工作电流（IB）的值和至少一个存储的电流值（IG）之间的差（ID），并且 从所述差值（ID）推导出电动工具（10）的热过载。 本发明还涉及相应的监视装置（22）。