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332 条记录 (耗时 0.013 秒)

    Two-phase brushless DC motor controller
    1.
    发明公开
    Two-phase brushless DC motor controller 失效
    两相无刷直流电机控制器

    公开(公告)号：EP0515974A3

    公开(公告)日：1995-02-01

    申请号：EP92108536.1

    申请日：1992-05-20

    申请人： Kruse, David L.

    发明人： Kruse, David L.

    IPC分类号： H02P6/02 ,  H01F40/14

    CPC分类号： H02P6/08 ,  H02P6/182

    摘要： 5n7 Control circuits for operating a two-phase brushless dc motor from a dc power source are described. Control of the motor is optimized by detecting induced back EMF of the two phases to sense rotor phase position. It is common knowledge that the voltage developed across the terminals of a permanent magnet motor can be represented by a winding resistance, a winding inductance and a generated back EMF. In two-phase brushless dc and permanent magnet stepping motors, the induced back EMFs of the two phases are displaced from each other by 90 electrical degrees. Thus, by detecting the back EMFs of the two phases, an accurate relative position of rotor-to-stator can be determined at any rotor position. Commutation of the motor phases and closed loop control of the motor and load is achieved by accurately sensing the back EMFs of the two phases. Also, phase position of the permanent magnet rotor poles is detected by integrating the sensed back EMFs of the two phases to produce quadrature sinewaves the magnitudes of which are constant relative to rotor speed.

    摘要翻译： 5n7描述了用于从直流电源操作两相无刷直流电机的控制电路。 通过检测两相的感应反电动势以检测转子相位位置来优化电动机的控制。 众所周知，在永磁电机端子上产生的电压可以由绕组电阻，绕组电感和产生的反电动势表示。 在两相无刷直流和永磁步进电机中，两相的感应反电动势彼此相差90电角度。 因此，通过检测两相的反电动势，可以在任何转子位置处确定转子 - 定子的准确相对位置。 通过精确感测两相的反电动势实现电机相位的换向和电机和负载的闭环控制。 而且，永磁体转子磁极的相位位置通过对两相的感测反电动势进行积分来检测，以产生相对于转子速度恒定的正交正弦波。

    Half-bridge turn-off slew-rate controller using a single capacitor
    3.
    发明公开
    Half-bridge turn-off slew-rate controller using a single capacitor 失效
    AbschaltbarerHalbbrücken-Austragszeit-Regler unter Verwendung eines einzelnen Kondensators。

    公开(公告)号：EP0627810A1

    公开(公告)日：1994-12-07

    申请号：EP93830247.8

    申请日：1993-05-31

    申请人： SGS-THOMSON MICROELECTRONICS S.r.l.

    发明人： Nessi, Maurizio ,  Fucili, Giona

    IPC分类号： H02P6/02

    CPC分类号： H02P6/085

    摘要： In a half-bridge output stage employing a complementary pair of output power transistors, each driven through an integrating stage for controlling the slew-rate, a single integration capacitance is conveniently shared by the two integrating stages that drive the power transistors. A pair of switches connect the single integrating capacitance to the input of either one of the two integrating stages and are controlled by a pair of nonoverlapping signals that have a certain advance with respect to the pair of logic signals that drive the half-bridge stage. In the case of a driving system of a multi-phase machine, the two configuring switches of the single integration capacitor may be driven by a pair of control signals that drive a different phase winding of the multi-phase machine, thus eliminating the need of a dedicated circuitry for generating said pair of anticipated signals to control the configuration switches.

    摘要翻译： 在采用互补输出功率晶体管对的半桥输出级中，每个驱动通过用于控制转换速率的积分级，由驱动功率晶体管的两个积分级方便地共享一个积分电容。 一对开关将单个积分电容连接到两个积分级中的任一个的输入端，并且由相对于驱动半桥级的一对逻辑信号具有一定前进的一对非重叠信号控制。 在多相机的驱动系统的情况下，单一积分电容器的两个配置开关可以由驱动多相机的不同相绕组的一对控制信号驱动，因此不需要 用于产生所述一对预期信号以控制配置开关的专用电路。

    Method and apparatus for operating polyphase DC motors using a PWM chopping signal in zero crossing determination
    5.
    发明公开
    Method and apparatus for operating polyphase DC motors using a PWM chopping signal in zero crossing determination 失效
    用于操作使用PWM斩波信号过零点检测器的多相直流电动机的方法和设备。

    公开(公告)号：EP0602977A2

    公开(公告)日：1994-06-22

    申请号：EP93310174.3

    申请日：1993-12-16

    申请人： SGS-THOMSON MICROELECTRONICS, INC.

    发明人： Carobolante, Francesco ,  Cameron, Scott W.

    IPC分类号： H02P7/29 ,  H02P6/02

    CPC分类号： H02P6/182

    摘要： A circuit for operating a polyphase dc motor has a plurality of driving coils has a circuit that provides instantaneous drive currents to selected ones of the driving coils in a each of a plurality of predetermined commutation sequences. Circuitry for detecting zero crossings of a back emf voltage of the coils is connected into a floating state during each of the predetermined commutation sequences to produce a back emf detection signal for timing changes among the predetermined commutation sequences. Circuitry controls the drive currents to the selected driving coils to be turned on and off, and circuitry delays the zero crossing detection for a predetermined time after the drive currents are turned-off. In a preferred embodiment, the circuitry for controlling the drive currents to the selected driving coils to be turned on and off comprises circuitry for generating a chop signal when the current in the active coils exceeds a predetermined threshold, and more particularly comprises PWM circuitry.
    A method for operating a polyphase dc motor having a plurality of driving coils is presented. According to the method, drive current supplied to the driving coils is chopped to control the maximum current delivered thereto by turning the drive current on and off. Zero crossings of a back emf voltage of the driving coils that are connected into a floating state are detected for producing a commutation signal, and the detection of zero crossings is inhibited for a predetermined time after the drive current is turned off during the chopping step to avoid detecting a false zero crossing. The chopping is performed as a part of a PWM operation.

    摘要翻译： 一种用于操作多相直流电动机电路具有驱动线圈的多元性具有电路确实提供瞬时驱动电流在每个预定的换向序列中的多个驱动线圈中所选择的。 电路，用于检测所述线圈的反电动势电压的过零点每个预定换向序列的过程中被连接到一个浮置状态，以产生反电动势检测信号用于定时处在预定的换向序列中的变化。 电路控制的驱动电流到所选择的驱动线圈被接通和关断，和电路延迟过零检测后的驱动电流被关断一个预定时间。 在优选实施例中，用于控制驱动电流到所选择的驱动线圈的电路，以打开和关闭包括电路被接通用于当在有源线圈的电流超过预定阈值，并且更特别地包括PWM电路产生一斩波信号。 提出一种用于操作具有驱动线圈的多个A多相直流电动机的方法。 。根据该方法，驱动电流提供给驱动线圈被斩波通过转动驱动电流和关断，以控制向其提供的最大电流。零个交叉驱动线圈没有被连接到一个浮置状态的反电动势电压的检测到 用于产生换流信号，和零个交叉检测在斩波步骤驱动电流被关闭后，以避免检测假零交叉被禁止一个预定的时间。 斩波执行作为PWM操作的一部分。

    RELUCTANCE MOTOR CAPABLE OF REGENERATIVE BRAKING AND DIRECT CURRENT MOTOR
    6.
    发明公开
    RELUCTANCE MOTOR CAPABLE OF REGENERATIVE BRAKING AND DIRECT CURRENT MOTOR 失效
    RELUKTANZMOTOR MIT NUTZBREMSUNG UND GLEICHSTROMMOTOR。

    公开(公告)号：EP0601189A1

    公开(公告)日：1994-06-15

    申请号：EP93909408.2

    申请日：1993-04-22

    申请人： KABUSHIKIGAISHA SEKOGIKEN

    发明人： BAHN, Itsuki

    IPC分类号： H02P7/00 ,  H02P6/02

    CPC分类号： H02P3/065 ,  H02P25/089

    摘要： A reluctance motor and a brushless direct current motor capable of operating at a high efficiency, at a high speed and with a high torque. When one excitating coil or armature coil is deenergized, the magnetic energy accumulated in the magnetic core is prevented from returning to the power source side by a reverse current blocking diode, and a capacitor of a small capacitance is charged and maintained at a high voltage. Therefore, the current falls rapidly. After a given time, the next excitating coil or armature coil is energized, but the applied voltage at that time is a high voltage at which the capacitor is charged. Therefore, the current rises rapidly. Since the rising and falling of the charge are sharp, it is possible to obtain a revolution of several tens of thousands per minute. At the same time, a counter torque is produced by means of a chopper circuit to execute the regenerative braking by shifting to the reserve conduction mode during the normal rotation.

    摘要翻译： 一种磁阻电动机和无刷直流电动机，其能够以高效率，高速度和高扭矩运行。 当一个激励线圈或电枢线圈被断电时，通过反向电流阻塞二极管防止积累在磁芯中的磁能返回到电源侧，并且将小电容的电容器充电并保持在高电压。 因此，目前的下降速度很快。 在给定的时间之后，下一个激励线圈或电枢线圈通电，但此时施加的电压是电容器充电的高电压。 因此，目前迅速上升。 由于电荷的上升和下降是尖锐的，所以可以获得几万分钟的转速。 同时，通过斩波电路产生反转矩，以在正常转动期间转移到保持导通模式来执行再生制动。

    Start assisting device for high speed reluctance motor
    9.
    发明公开
    Start assisting device for high speed reluctance motor 失效
    开始高速电动机辅助装置

    公开(公告)号：EP0556117A3

    公开(公告)日：1993-09-22

    申请号：EP93400338.5

    申请日：1993-02-10

    申请人： LG ELECTRONICS INC.

    发明人： Baik, In Cheol ,  Lim, Jun Young

    IPC分类号： H02P7/00 ,  H02P6/02 ,  H01L29/784 ,  H01L29/10

    CPC分类号： H02P6/185 ,  H02P1/163 ,  H02P6/22

    摘要： A start assisting device for a high speed reluctance motor, capable of starting the motor at a specific start disabling position where a static torque with a very small angle is present due to a phase advance. When the motor can not be started at a specific position, clock signals are supplied as gate drive signals, in place of drive signals based on a motor position detection. After starting the motor, the drive signals based on the position detection is supplied as gate drive signals, so as to drive normally the motor. Otherwise, when the motor can not be started, the drive signals based on the position detection is supplied as gate drive signals for different phases, so as to start the motor. After starting the motor, the drive signals based on the position detection are supplied as gate drive signals for corresponding phases, so as to drive normally the motor.

    摘要翻译： 一种用于高速磁阻电动机的启动辅助装置，其能够由于相位超前而在具有非常小的角度的静态转矩的特定起动禁止位置启动电动机。 当电机不能在特定位置启动时，作为门驱动信号提供时钟信号，代替基于电机位置检测的驱动信号。 启动电机后，基于位置检测的驱动信号作为门驱动信号提供，以便正常驱动电机。 否则，当电机不能启动时，基于位置检测的驱动信号作为不同相位的栅极驱动信号提供，以启动电机。 在启动电机之后，基于位置检测的驱动信号作为相应相位的门驱动信号提供，以便正常地驱动电动机。