-
公开(公告)号：US06229274B1
公开(公告)日：2001-05-08
申请号：US09500394
申请日：2000-02-08
IPC分类号： H02P620
CPC分类号： H02P6/21
摘要： A method for starting a polyphase DC motor having a rotor. The position of the rotor is detected by initiating current in each of the phases of the motor and measuring a time period between the initiation of current in the coil and an instant when the current exceeds a threshold current. The phase in which the current reaches the threshold in the shortest amount of time is the phase closest to the position of the rotor. A phase closest to the position of the rotor is identified in each of an odd number of trials, and a starting phase is selected as the phase identified in the majority of trials. The motor is started by providing current to the starting phase.
摘要翻译： 一种用于启动具有转子的多相直流电动机的方法。 通过在电动机的每个相中启动电流并测量线圈中的电流启动与电流超过阈值电流的瞬间之间的时间段来检测转子的位置。 电流在最短时间内达到阈值的相位是最靠近转子位置的相位。 在奇数个试验中的每一个中确定最靠近转子位置的相位，并且选择起始阶段作为大多数试验中确定的相位。 通过向启动阶段提供电流来启动电机。
-
公开(公告)号：US5920166A
公开(公告)日：1999-07-06
申请号：US843918
申请日：1997-04-17
摘要： A circuit for controlling the slew rate at a motor coil during turn-on in a commutation sequence is disclosed. The disclosed circuit includes a switched current mirror that receives the commutation signal, and that provides a mirrored current to the input of an integrating buffer amplifier when its associated coil is to be driven. The integrating buffer amplifier includes an amplifier with a feedback capacitor, and a current source connected at its input, for reducing the voltage slew rate during turn-off of the transistor. The mirrored current applied to the input on the integrating buffer amplifier is greater than that of the current source, but limited so as to reduce the voltage slew at the coil.
摘要翻译： 公开了一种用于在换向序列中的开启期间控制电动机线圈的转换速率的电路。 所公开的电路包括接收换向信号的开关电流镜，并且当其相关联的线圈被驱动时，其向积分缓冲放大器的输入提供镜像电流。 积分缓冲放大器包括具有反馈电容器的放大器和在其输入端连接的电流源，用于降低晶体管关断期间的电压转换速率。 施加到积分缓冲放大器的输入的镜像电流大于电流源的反射电流，但受到限制，以便减小线圈上的电压。
-
13.发明授权
公开(公告)号：US5341282A
公开(公告)日：1994-08-23
申请号：US865421
申请日：1992-04-08
CPC分类号： H01H47/325 , H02H3/08 , H02H9/047 , Y10T307/878
摘要： An inductive load drive device which has a switch defining an output terminal connectable to an inductive load between the output terminal and a reference potential line is provided. A first current recirculating branch is connectable parallel to the load and a control opens and closes the switch so that the load is supplied with current rising to a first predetermined value in a first increasing phase and falling to a second predetermined value in a first recirculating phase. The device detects a short-circuit between the output terminal of the control device and the reference potential line with a first current sensor for detecting current flow in the first recirculating branch during the first recirculating phase. A fault signaling circuit connected to the first current sensor produces a short-circuit signal in the absence of current in the first recirculating branch during the first recirculating phase.
摘要翻译： 提供一种感性负载驱动装置，其具有限定可连接到输出端子和参考电位线之间的感性负载的输出端子的开关。 第一电流循环分支可平行于负载连接，并且控制器打开和闭合开关，使得负载在第一增加阶段中以上升到第一预定值并在第一再循环阶段中下降到第二预定值 。 该装置利用第一电流传感器检测控制装置的输出端与参考电位线之间的短路，用于检测在第一再循环阶段期间第一再循环分支中的电流。 连接到第一电流传感器的故障信号电路在第一再循环阶段期间在第一再循环分支中没有电流时产生短路信号。
-
公开(公告)号：US5001414A
公开(公告)日：1991-03-19
申请号：US440034
申请日：1989-11-21
IPC分类号： H01L27/04 , G05F3/30 , H01L21/822
CPC分类号： G05F3/30 , Y10S323/907
摘要： This voltage reference circuit has high thermal stability and minimal bulk and comprises a transistor defining a base-emitter junction having a voltage drop which varies in a non-linear manner as a function of temperature and resistors connected in series to the junction, the junction and the resistors being interposed between a ground line and the output terminal. A compensation transistor generates a compensation current which varies as a function of temperature so as to produce a voltage drop with a behavior substantially opposite to the previous voltage drop upon reaching the switching on temperature of the transistor.
-
15.发明授权Method for detecting the position of a rotor of a DC motor and related circuit 有权用于检测直流电动机和相关电路的转子位置的方法公开(公告)号：US06841903B2
公开(公告)日：2005-01-11
申请号：US10285362
申请日：2002-10-30
摘要： A method for detecting the position of a rotor of a DC motor with N phases having a plurality of windings, comprising the steps of connecting two of the windings between first and second prefixed voltages through to a first current path for a prefixed time, allowing the current stored in the two windings to discharge through a second current path; comparing the voltage across one of the two windings with a reference voltage and providing a control signal when the voltage is smaller in absolute value than the reference voltage, performing the above steps for each of the winding pairs of the motor; detecting the position of the rotor on the basis of the control signals obtained.
摘要翻译： 一种用于检测具有多个绕组的N相的直流电动机的转子的位置的方法，包括以下步骤：将第一和第二预定电压之间的两个绕组连接到第一电流路径以进行预定时间，从而允许 存储在两个绕组中的电流通过第二电流路径放电; 将两个绕组中的一个的电压与参考电压进行比较，并且当电压的绝对值小于参考电压时提供控制信号，对电动机的每个绕组对执行上述步骤; 基于获得的控制信号来检测转子的位置。
-
公开(公告)号：US5661383A
公开(公告)日：1997-08-26
申请号：US315766
申请日：1994-09-30
摘要： A circuit for controlling the slew rate at a motor coil during turn-on in a commutation sequence is disclosed. The disclosed circuit includes a switched current mirror that receives the commutation signal, and that provides a mirrored current to the input of an integrating buffer amplifier when its associated coil is to be driven. The integrating buffer amplifier includes an amplifier with a feedback capacitor, and a current source connected at its input, for reducing the voltage slew rate during turn-off of the transistor. The mirrored current applied to the input of the integrating buffer amplifier is greater than that of the current source, but limited so as to reduce the voltage slew at the coil.
摘要翻译： 公开了一种用于在换向序列中的开启期间控制电动机线圈的转换速率的电路。 所公开的电路包括接收换向信号的开关电流镜，并且当其相关联的线圈被驱动时，其向积分缓冲放大器的输入提供镜像电流。 积分缓冲放大器包括具有反馈电容器的放大器和在其输入端连接的电流源，用于降低晶体管关断期间的电压转换速率。 施加到积分缓冲放大器的输入端的镜像电流大于电流源的反射电流，但受到限制，以便减小线圈上的电压。
-
公开(公告)号：US5623254A
公开(公告)日：1997-04-22
申请号：US367746
申请日：1995-01-03
IPC分类号： G01R31/02 , H03K17/082 , B60Q1/00
CPC分类号： G01R31/024 , H03K17/0822
摘要： A drive circuit fault detection device comprising a discriminating circuit generating a digital signal, the level of which indicates a fault; and an identifying circuit generating a binary-coded signal indicating the type of fault, i.e. ground shorting of the drive circuit or an open load. The discriminating circuit comprises a resistive network connected to the output of the drive circuit, for generating a voltage indicating correct connection of the load or a fault on the drive circuit and a comparator for comparing the generated voltage with a reference voltage and supplying the digital signal at its output. The identifying circuit comprises a current mirror circuit generating an output voltage having two different logic levels in the event of short circuiting or an open load, respectively, and a combination circuit for generating the binary-coded output signal.
摘要翻译： 一种驱动电路故障检测装置，包括产生数字信号的识别电路，其电平表示故障; 以及识别电路，产生指示故障类型的二进制编码信号，即驱动电路的接地短路或开路负载。 识别电路包括连接到驱动电路的输出的电阻网络，用于产生指示驱动电路上的负载或故障的正确连接的电压以及比较器，用于将产生的电压与参考电压进行比较并提供数字信号 在其产出。 识别电路包括分别在短路或开路负载的情况下产生具有两个不同逻辑电平的输出电压的电流镜电路和用于产生二进制编码的输出信号的组合电路。
-
18.发明授权Generator of reference voltage that varies with temperature having given thermal drift and linear function of the supply voltage 失效参考电压发生器随着给定热漂移和电源电压线性函数的温度而变化
公开(公告)号：US5266885A
公开(公告)日：1993-11-30
申请号：US851980
申请日：1992-03-12
CPC分类号： G01R1/28 , Y10S323/907
摘要： The generator of reference voltage comprises a first current generator suitable for generating a current that varies linearly with the supply voltage, a first voltage generator suitable for generating a constant voltage with zero thermal drift, a second current generator suitable for generating a current dependent on the voltage with zero thermal drift, a second voltage generator suitable for generating a voltage with given thermal drift, a third current generator suitable for generating a current dependent on the voltage with given thermal drift and means for combining the three currents together so as to produce across an output resistance an output voltage having a value equal to the product of the output resistance by the first and third current, divided by the second current.
-
公开(公告)号：US5208527A
公开(公告)日：1993-05-04
申请号：US811261
申请日：1991-12-19
CPC分类号： G05F1/463 , G05F3/30 , Y10S323/907
摘要： The generator comprises a first generator of voltage with thermal drift of zero, a second generator of voltage with given thermal drift, first means for applying a given load to the voltage generated by the first generator, second means for applying a given load to the voltage generated by the second generator, subtracting means for subtracting one from the other the loaded voltages generated by said first and second generator of voltage.
摘要翻译： 发电机包括具有热漂移为零的电压的第一发生器，具有给定热漂移的电压的第二发生器，用于将给定负载施加到由第一发电机产生的电压的第一装置，用于将给定负载施加到电压的第二装置 由所述第二发电机产生的减法装置，用于从所述第一和第二发电机产生的负载电压中减去一个电压。
-
-
-
-
-
-
-
-
搜索结果
19 条记录 (耗时 0.012 秒)
